To improve forming performance in a smart mill allowing implementation of required forming by moving a forming tool arranged in a stand of a pipe mill automatically to a predetermined position.
To improve forming performance in a smart mill allowing implementation of required forming by moving a forming tool arranged in a stand of a pipe mill automatically to a predetermined position.
Non-drive type breakdown rolls BD exclusive to bending are arranged in multiple stands. Drive roll DR stands exclusive to driving are arranged in stages in front of and behind each DR stand. The drive roll DR is configured to apply thrust to a central portion of a raw material using an upper flat roll and a lower flat roll, and has thrust control means and driving rotation number control means for applying thrust required for passage through the step using the drive rolls DR in multiple stages entirely and controlling the thrust. Applying the thrust under pressure control to the central portion of the material using the upper and lower flat rolls at the DR stand provides a definite roll reference diameter and feeds the raw material at a constant speed and thrust, making it possible to ensure thrust required for various product diameters or thicknesses.
B21C 37/08 - Making tubes with welded or soldered seams
B21C 37/18 - Making tubes with varying diameter in longitudinal direction conical tubes
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
The purpose of the present invention is to provide a simple structure that does not interfere with a chopping mechanism, in a bead processing part of a mandrel for use in manufacturing a small-diameter pipe. In order to achieve such structure, a reciprocating rod 15 for horizontally moving a movable blade 11 is mounted inside and outside a mandrel 1 and extended to an open side of a raw pipe that supports the mandrel 1 on an upstream side, and a drive source 30 is disposed on a support part side. As a machine mechanism for transmitting an input from the drive source 30 to the reciprocating rod 15, an input conversion link mechanism is employed, wherein one end of a joint link 23 joining two links 21 is a fixed end 24, another end thereof is connected as a slidable end 25 to the reciprocating rod 15, an input rod 26 from the drive source 30 is pivotally attached to the joint point of the joint link 23, and the reciprocating rod 15 is caused to move linearly by motion of the joint link 23 which is straightened and bent by the input rod 26.
B23D 1/24 - Planing or slotting machines cutting by relative movement of the tool and workpiece in a horizontal straight line only with tool-supports or work-supports specially mounted or guided for working in different directions or at different anglesSpecial purpose machines for planing inner surfaces, e.g. of moulds
B23K 37/08 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for flash removal
B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
In a method for manufacturing a metal pipe from a metal plate using a forming tool, the position of the tool is optimized simply and correctly by incorporating individuality of the raw material plate into setting of the tool position.
In a method for manufacturing a metal pipe from a metal plate using a forming tool, the position of the tool is optimized simply and correctly by incorporating individuality of the raw material plate into setting of the tool position.
As a preparatory stage, a forming process is analyzed by simulation for each plate. Based on result of the analysis, correlation between a deformed shape value of a raw pipe and tool position information is acquired. Then, the forming process for each plate is stored as correlation between the deformed shape value of the raw pipe and the tool position information. During pipe manufacturing, a deformed shape value of the raw pipe is measured actually while a plate is passed. On the basis of the actually measured deformed shape value, a forming process for the raw pipe is expected and assumed (by using the correlation). Tool position information necessary for implementing the expected and assumed forming process is retrieved from the stored correlation. The retrieved tool position information is realized at a stand array.
B21C 31/00 - Control devices for metal extruding, e.g. for regulating the pressing speed or temperature of metalMeasuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
B21C 37/08 - Making tubes with welded or soldered seams
B21C 37/30 - Finishing tubes, e.g. sizing, burnishing
[Problem to be solved] To provide a squeeze device of excellent economic efficiency and excellent workability for electric resistance welded pipe manufacturing having a simple configuration, achieving size reduction and weight reduction easily, and allowing operation in roll changing to be performed simply.
[Problem to be solved] To provide a squeeze device of excellent economic efficiency and excellent workability for electric resistance welded pipe manufacturing having a simple configuration, achieving size reduction and weight reduction easily, and allowing operation in roll changing to be performed simply.
[Solution] The squeeze device includes: a U-shaped fixed stand 10 with an open top; and a slidable roll support plate 60 inserted into the U-shaped fixed stand 10 through the open top of the U-shaped fixed stand 10 and held in the U-shaped fixed stand 10 in a manner allowing taking off of the roll support plate 60. The roll support plate 60 supports right and left side rolls 40 in a pair and an upper roll 50 on an upstream-side main surface in a manner allowing the side rolls 40 and the upper roll 50 to move in screw down directions. The roll support plate 60 has space 61 for passage of the pipe-shaped material formed at a position surrounded by these rolls. The space 61 is a part of a cutout-shaped opening opened toward a lower edge of the roll support plate 60. Each of the right and left side rolls 40 in a pair is a tilted roll with a corresponding roll shaft 42 tilted outwardly toward a higher position.
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
[Problem] To improve formability in a smart mill capable of achieving desired forming by causing the position of a forming tool disposed in a stand of a pipe mill to be automatically moved to a predetermined position. [Solution] A drive-free breakdown roll BD dedicated to bend forming is disposed on a plurality of stands. Drive-dedicated drive roll DR stands are disposed upstream and downstream of each BD stand. Drive rolls DR are configured to apply a thrust to a center portion of a material using upper and lower flat rolls, and each have a thrust control means and a driving rotation speed control means for applying, by a plurality of stages of drive rolls DR as a whole, and controlling thrust required for passing respective steps. A thrust is applied to the center portion of the material by pressure control using the upper and lower flat rolls in the DR stands, whereby a roll reference diameter is clearly defined, the material is transferred at a constant speed and thrust, and a required thrust can be ensured for various outer diameters and wall thicknesses of products.
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
[Problem] To provide a method for manufacturing a metal tube from a metal plate by using a molding tool, in which an optimization task for a tool position is performed simply and accurately by reflecting the uniqueness of a material plate to the setting of the tool position. [Solution] As a preparation step, a molding process is subject to a simulation analysis for each plate. From the analysis result thereof, a correlation between a modification value of a raw tube and tool position information is obtained. In addition, the molding process for each tube is stored as the correlation between the modification value of the raw tube and the tool position information. When a tube is made, the modification value of the raw tube is actually measured while the plate is passed. From the actually measured modification value, the molding process for the raw tube is predicted and supposed (the correlation is used). The tool position information, which is required to execute the predicted and supposed molding process, is extracted from the stored correlation. The extracted tool position information is implemented in stand rows.
[Problem] To provide a squeeze device for manufacturing an electric resistance welded pipe, which has a simple structure, achieves easy downsizing and weight reduction, and requires an easy operation at a time of roll exchanging, and which is excellent in economy and workability. [Solution] A squeeze device provided with: a U-shaped fixed stand 10, a top portion of which is opened; and a slide-type roll support plate 60 which is inserted in the stand so as to be capable of being taken out from the opened top portion of the U-shaped fixed stand 10, and held in the stand. The roll support plate 60 supports a pair of left and right side rolls 40 and upper rolls 50 on a main surface on an upstream side so as to be movable in a pressing direction, and has, in a position surrounded by the rolls, a space 61 for causing the pipe-like material to pass through. The space 61 is a part of a notch-like opening portion which is opened toward a lower rim of the roll support plate 60. The pair of left and right side rolls 40 is tilted rolls, roll axes 42 of which are tilted outwards upwardly.
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
B21C 37/08 - Making tubes with welded or soldered seams
Changing of a horizontal roll in a horizontal roll stand involving readjustment of an amount of pressing is to be done readily and promptly. In order to achieve this, a horizontal roll stand 10 with a pair of built-in upper and lower horizontal rolls 11 is configured to retreat toward one side across a forming line. A fixed stand 40 stands upright on a counter-retreating side of the forming line. An overhang part 42 of the fixed stand 40 jutting out over the forming line is provided with a pressure device 43 that applies a pressing force to the horizontal rolls 11. The horizontal roll stand 10 includes a horizontal roll housing 12 with an opened top, receives the pressing force from the pressure device 43 via the opened top, and retreats to the outside of the forming line while the pressure device 43 is left on the forming line. The overhang part 42 of the fixed stand 40 is engaged with the horizontal roll housing 12 of the horizontal roll stand 10 to support the horizontal roll housing 12 in the forming line.
B21B 31/20 - Adjusting rolls by moving rolls perpendicularly to roll axis
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
B21B 31/08 - Interchanging rolls, roll mountings, or stand frames
B21C 37/08 - Making tubes with welded or soldered seams
9.
Welded pipe manufacturing apparatus and welded pipe manufacturing method
To manufacture a high-quality welded pipe, there is provided a welded pipe manufacturing apparatus for manufacturing a welded pipe by bending a metal plate and welding butting end portions of the metal plate. The welded pipe manufacturing apparatus includes a bending unit that bends the metal plate, a light emitter that emits directional light to an inner surface of the metal plate bent by the bending unit, an image capturing unit that captures light emitted by the light emitter and reflected by a surface of the metal plate, and an adjustment assistance unit that assists adjustment of the bending unit in accordance with a shape of the reflected light.
B21C 37/08 - Making tubes with welded or soldered seams
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
B23K 37/053 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical workClamping devices therefor
G01N 21/88 - Investigating the presence of flaws, defects or contamination
[Problem] To enhance moldability in molding a square tube, wherein a round tube is passed through a plurality of roll stands arranged along an element tube molding direction and thereby molded into a square tube, and to provide a square tube molding device with high versatility, and to reduce the overall length of a line of roll stands. [Solution] First flat roll stands 20A and second flat roll stands 20B, the reduction directions of which are orthogonal to each other, are arranged alternately in a molding direction to form a roll stand line 10. Each of the roll stands 20A and 20B has a roll interval adjustment means with which the reduction amount can be set independently, and among the adjacent first flat roll stands 20A and second flat roll stands 20B, one stand is rotationally driven by a roll driving means 40. A molding reduction amount distribution from an initial stand to a final stand is selected in advance in accordance with the outer diameter, the wall thickness, and the material of the element tube to be molded, as well as the size of the planned square tube product, and is allocated individually as a reduction amount for each of the roll stands 20A and 20B.
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
B21C 37/15 - Making tubes of special shapeMaking the fittings
A pipe cutting machine comprises: rotary blades in a pair, with a plane at a right angle to a center line of a pipe, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in an x-axis direction; a straightforward driving mechanism that drives the rotary blades straightforward in opposite directions of a y-axis direction so as to make the rotary blades pass each other on the x axis and in the vicinity of the x axis; and power direction conversion mechanisms that move the rotary blades outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades pass each other on the x axis and in the vicinity of the x axis.
B23D 45/12 - Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade for cutting tubes
B23D 45/10 - Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of circular saw blades
B23D 47/00 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
B23D 21/00 - Machines or devices for shearing or cutting tubes
B23D 45/20 - Flying sawing machines, the saw carrier of which is reciprocated in a guide and moves with the travelling stock during sawing
B23D 47/04 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
B23D 25/08 - Flying shearing machines having two coacting shearing blades mounted independently
B23D 33/02 - Arrangements for holding, guiding, or feeding work during the operation
B23D 47/12 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
The purpose of the present invention is to simply and rapidly perform replacement operations for horizontal rolls within a horizontal roll stand, including readjustment of reduction amount. To achieve this, a horizontal roll stand 10, which has an upper and lower pair of built-in horizontal rolls 11, can be retracted to one side of the forming line. A fixed stand 40 is arranged on the side of the forming line opposite from the retraction, and a reduction device 43 for imparting reduction force to the horizontal rolls 11 is provided in an overhanging part 42 for the fixed stand 40 jutting out above the forming line. The horizontal roll stand 10 has a horizontal roll housing 12 that is open at the top, and receives reduction force from the reduction device 43 via that open upper part and is retracted to the outside of the forming line leaving the reduction device 43 above the forming line. The overhanging part 42 of the fixed stand 40 is mated with the horizontal roll housing 12 of the horizontal roll stand 10 within the forming line and supports the horizontal roll housing 12.
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
Provided is a welded tube manufacturing device that, in order to manufacture a high quality welded tube, manufactures a welded tube by bending a metal plate and welding together the edges of the metal plate that are made to abut each other, wherein the welded tube manufacturing device comprises: a bending means that bends the metal plate; a light emission means that projects directional light onto the inner surface of the metal plate that was bent by the bending means; an imaging means that images reflected-light produced by reflecting the light projected by the light emission means onto the surface of the metal plate; and an adjustment assistance means that assists adjustment of the bending means according to the shape of the reflected light.
B21C 37/08 - Making tubes with welded or soldered seams
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
B23K 37/053 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical workClamping devices therefor
G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
[Problem] To provide a pipe cutting machine, which is capable of efficiently cutting even large diameter pipes in a short time, the structure of which is simple, small, lightweight and economical, and which has excellent durability. [Solution] A pipe cutting machine for cutting a pipe 10 at a right angle to the center line thereof is provided with: a pair of rotating saw blades 20, 20 disposed, when a plane at a right angle to the center line of the pipe 10 to be cut is the x-y plane and the center of the pipe 10 is the origin of the coordinates, opposite each other on the two sides of the y-axis so that the tool edges overlap in the x-axis direction; a rectilinear drive mechanism 50 for rectilinearly driving the pair of rotating saw blades 20, 20 in opposite directions in the y-axis direction so that the pair of rotating saw blades 20, 20 pass by each other on and near the x-axis; and motive power direction-changing mechanisms 46 and 47 for moving the pair of rotating saw blades 20, 20 outward from the y-axis by changing a portion of the rectilinear driving force in the y-axis direction to the x-axis direction in order to avoid interference of the tool edges when the pair of rotating saw blades 20, 20 pass each other on and near the x-axis.
B23D 45/12 - Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade for cutting tubes
B23D 21/00 - Machines or devices for shearing or cutting tubes
B23D 45/10 - Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of circular saw blades
B23D 45/20 - Flying sawing machines, the saw carrier of which is reciprocated in a guide and moves with the travelling stock during sawing
B23D 47/00 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
B23D 47/04 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
B23D 47/12 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
15.
Ring tool unit, method for manufacturing the same, sleeve, and mandrel
An object is to prolong the life of a ring tool, and improve the productivity of a welded pipe. A ring tool unit is held in a downstream-side end portion of a mandrel to be inserted into a welded pipe currently being manufactured from the upstream side of a welding position, and is used as a cutting tool for continuously cutting a bead produced on the inner surface of the welded pipe, wherein the ring tool unit is formed by fitting a ring tool having a ring-like blade in a sleeve having a circular hole for holding the outer circumference of the ring tool.
B23K 37/08 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for flash removal
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
The purpose of the present invention is to manufacture a round pipe with an opening diameter of several inches to several tens of inches in a small number of steps (number of processes, number of stands) while suppressing non-steady deformations such as dipping at the front end parts and back end parts of materials that become problematic when sheet materials are used as forming materials. To achieve this, an FP stand (20) is disposed on the downstream side of a line for BD forming of the forming material into an open pipe. The FP stand (20) has a configuration which uses a turning unit (21) for an upper unit and rolls (22, 23) for a lower unit and side units, wherein the turning unit (21) is configured to support, so as to be able to rotate on an endless track, a die train of grooved dies connected to each other endlessly. An SZ stand (40), which is formed from two rolls, up and down, or four rolls, up, down, left, right, is disposed on the downstream side of the FP stand (20), and furthermore, a welding means (50) for outer surface welding or inner surface tack welding of both edge parts of the open pipe is disposed within the line so as to carry out in-line outer surface welding or in-line inner surface tack welding of both edge parts of the open pipe.
B21D 5/10 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
B21C 37/08 - Making tubes with welded or soldered seams
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
B23K 9/025 - Seam weldingBacking meansInserts for rectilinear seams
The purpose of the present invention is to manufacture a round pipe the diameter of which is from a few inches to tens of inches, using a small number of stages (number of steps, number of stands), and while suppressing irregular deformation such as sagging at the leading end or tail end of a material, which is a problem that occurs if a sheet material is used as the molding material. In order to achieve the foregoing, in the present invention, a BD stand (10) is formed by a pair of rotation units (11, 11). An FP stand (20), which is provided at a stage subsequent to the BD stand (10) stage, has a one-stand three-roll configuration in which a rotation unit (21) is used as an upper unit and molding rolls (22, 23) are used as a side unit and a lower unit. The pair of rotation units (11, 11) in the BD stand (10) and the rotation unit (21) in the FP stand (20) overlap at the side where the units are adjacent. In that overlap area, while an open pipe is held by an auxiliary bottom roll (32) which is liftable, portions of the open pipe near both edges thereof are subjected to a pressing force by side support rolls (31, 31) which are present on both sides of the open pipe.
B21D 5/10 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
B21C 37/08 - Making tubes with welded or soldered seams
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
B30B 5/06 - Presses characterised by the use of pressing means other than those mentioned in groups and wherein the pressing means is in the form of an endless band co-operating with another endless band
18.
RING CUTTING UNIT, METHOD FOR PRODUCING SAME, SLEEVE, AND MANDREL
The purpose of the present invention is to increase the service life of a ring cutting tool and produce welded pipes more efficiently. A ring cutting unit is held on the downstream end of a mandrel that is inserted inside a welded pipe in production, upstream of the welding position, and is used as a cutting instrument for continuously cutting beads occurring on the inner surface of the welded pipe. The ring cutting unit is characterized by being formed by fitting a ring cutting tool with a ring-shaped blade into a sleeve that has a circular hole for embracing the outer periphery of the ring cutting tool.
B23D 1/24 - Planing or slotting machines cutting by relative movement of the tool and workpiece in a horizontal straight line only with tool-supports or work-supports specially mounted or guided for working in different directions or at different anglesSpecial purpose machines for planing inner surfaces, e.g. of moulds
B21C 37/30 - Finishing tubes, e.g. sizing, burnishing
B23K 37/08 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for flash removal
In order to efficiently and economically achieve precise hydraulic testing of each test tube, even when there is a wide range of test tube sizes, a plurality of pressure-increasing cylinders (41) are used that are connected in parallel to the test tubes and have a gradually increasing pressure-increase ratio. A plurality of servo motor drive pumps (51) arranged in parallel are used as the drive source for the plurality of pressure-increasing cylinders (41). The plurality of servo motor drive pumps (51) are operated simultaneously until the output-side water pressure of the pressure-increasing cylinders (41) approaches the test pressure. Then the driving of all but one of the plurality of servo motor drive pumps (51) is stopped and the pressure is increased to the test pressure by using the remaining one servo motor drive pump (51). When boosting pressure, the plurality of pressure-increasing cylinders (41) are used in order, from the cylinder having the lowest pressure-increase ratio to the cylinder having the highest.
[Problem] To provide a heat transfer tube for a heat exchanger, which enables the heat exchanger to have a compact construction. [Solution] A heat transfer tube (11) for a heat exchanger is provided with: an outer tube (13); multiple inner tubes (15) inserted through the outer tube (13) so that the axes of the inner tubes are arranged with an equal distance from one to the other in a cross section orthogonal to the axes; a first coil (17) having at least a portion thereof fixed on an inner circumferential surface (21) of the outer tube, said multiple inner tubes (15) being inserted through the first coil (17); second coils (19) each having at least a portion thereof fixed on an inner circumferential surface (23) of each inner tube; a flow path cross-section area (S1) of a first flow path (25) defined by the inside of the outer tube (13) and the outsides of the inner tubes (15); and a flow path cross section area (S2) of second flow paths (27), defined by a total area of flow path cross sections of the inner tubes (15) and having a ratio with the flow path cross section (S1) such that S1:S2 = 1:2 to 2:1.
F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
F28D 7/14 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically both tubes being bent
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
21.
HEAT EXCHANGER AND METHOD FOR PRODUCING HEAT EXCHANGER
[Problem] To provide: a heat exchanger such that it is possible to configure an inlet/outlet section, a duct conversion section, and a heat exchanging section by means of few types of members; and a method for producing a heat exchanger. [Solution] The heat exchanger (11) is provided with: a heat exchanger substrate (13) at which through-holes (25) are arrayed in an even number of at least two columns and an odd number of at least three stages; a duct conversion substrate (15) having an interconnecting hole (27) that interconnects at least two obliquely adjacent through-holes in different columns and different stages; a laminate heat exchanger (17) having a primary duct and secondary duct by laminating the heat exchanger substrate (13); two end substrates (19) that are disposed in a left-right inverted manner sandwiching the laminate heat exchanger (17) and punctured by through-holes (25) corresponding to a pair of through-holes (25) positioned at the two ends in the direction of a diagonal line; and a first duct conversion section (21) and second duct conversion section (23) that connect the pair of through-holes (25) of the end substrates (19) to the primary ducts and secondary ducts by means of laminating the duct conversion substrate (15) and being interposed between the respective end substrates (19) and the laminate heat exchanger (17).
F28F 3/08 - Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F28D 9/02 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the heat-exchange media travelling at an angle to one another
Provided is a helical blade cutter having excellent handling properties and economy with which economic losses due to blade damage can be suppressed to the extent possible, for which a blade is mounted and replaced easily, and for which manufacturing costs are inexpensive. The present invention is a helical blade cutter on which a plurality of linear blades (20), inclined at a prescribed helix angle (α) with respect to a line on the outer circumferential face parallel to the central axis of rotation (O), is mounted on the outer circumferential face of a circular body (10), the exterior face of which is a cylindrical circumferential face, at prescribed intervals in the circumferential direction of the outer circumferential face. Blade mounting faces (13), inclined at the same angle as the helix angle (α) of the blade (20) and inclined at a rake angle (β) in the direction of the elevation angle with respect to a line tangent to the outer circumferential face of the circular body (10), are formed on the outer circumferential face at prescribed intervals in the circumferential direction with steps (14) that are created by the inclination of the elevation angle therebetween. The blade (20) is removably mounted via a tip holder (30) into a blade mounting section (17) that has an L-shape cross section and is enclosed by the blade mounting face (13) and the step (14).
An object of the present invention is to provide a forming method and a forming machine in which in forming e.g., a round steel pipe, predetermined forming can be performed with less additional deformation imparted to a workpiece without deteriorating the productivity of the conventional roll forming, thereby manufacturing a high-quality product with high dimension precision. To achieve this object, the present invention provides a forming method and a forming machine, which adopt a rotating unit which rotatably moves on an endless track a die train having dies with outwardly directed and swingable forming passes in a breakdown step at an early forming stage, and in which the forming pass of each die holds the edge of the workpiece to rotatably move the die by changing the die to a predetermined angle, thereby realizing bending, so that problems due to twisting onto forming rolls and high locally-caused contact stress can be greatly reduced.
B21D 7/08 - Bending rods, profiles, or tubes by passing between rollers or through a curved die
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
NATIONAL UNIVERSITY CORPORATION KYOTO INSTITUTE OF TECHNOLOGY (Japan)
Inventor
Wang Feizhou
Nakano Tomoyasu
Inokuma Akinori
Yin Jilong
Akai Terutomo
Akiyama Masayoshi
Uchimura Takashi
Abstract
[Problem] To prevent occurrences of abrasion marks on the outside surface of material that has undergone molding processing between revolving units in a molding device that carries out a molding process for material to be molded between a pair of the revolving units in which an endless mold row moves in a revolving motion on an endless track, said endless mold row being constituted by connecting mold units (9), in which hole forms (11) for molding molds (10) are oriented outward, in an endless row. To achieve this, mutually latching parts (12b, 12c) that prevent positional offsetting with respect to each other of the adjacent mold units (9) in the endless mold row in the circumferential direction within a plane at a right angle to the direction of movement during movement between the revolving units are provided on the two sides of each mold unit (9). Edge parts of the hole forms (11) in the molds (10) are rounded at the end parts in the direction of movement of the units.
B21D 5/10 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
B21C 37/08 - Making tubes with welded or soldered seams
[Problem] To keep the installation space small with respect to the length of the test pipe for a pipe drifting machine that passes a drift mandrel through the interior of various kinds of manufactured pipes such as cast pipes, molded pipes, etc. to examine the internal diameter precision and bending precision of the various kinds of pipes over the entire lengths thereof. To prevent damage to the inner surface of the test pipe due to bending of the linear member that supports the drift mandrel. To this end, a chain (30) that can be wound in one direction is used as the linear member that supports the drift mandrel (20) and said chain (30) is wound three-dimensionally and stored in a reel (40) that is set behind the test line. Because the chain (30), which is dispensed from the reel (40), maintains a linear state and does not curve in other directions as a result of the adjacent pieces abutting against each other, the propulsion force applied on the chain (30) is transmitted effectively to the drift mandrel (20) on the tip. The chain (30) has a running roller (36) for each piece and moves inside the test pipe (10) with the rollers contacting the inner surface of the lowest section of said test pipe (10).
G01B 5/12 - Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
26.
HEAT EXCHANGER, COUPLER THAT CONNECTS HEAT EXCHANGER TUBES TO HEADER WALL OF HEAT EXCHANGER, AND METHOD OF MANUFACTURING HEAT EXCHANGER USING SAID COUPLERS
[Problem] To provide a heat exchanger which can decrease the pitch of heat exchanger tubes without decreasing the pitch of the holes in the header wall, and in which the ends of the heat exchanger tubes do not protrude from the header wall. [Solution] A heat exchanger (1) provided with a header wall (21) with holes (22) configured to have a smaller diameter than the outer diameter of the ends of the heat exchanger tubes (3), and couplers (6) which connect the heat exchanger tubes (3) to the holes (22) of the header wall (21), wherein the couplers (6) are configured so as to be provided with a flange (61) which contacts the surface of the header wall (21) and a body (62) which, in a state inserted into said hole (22) in the header wall (21), is disposed so as to protrude from the hole (22). Further, the inner circumference of the heat exchanger tubes (3) and the outer circumference of the bodies (62) which protrude from the holes (22) in the header wall (21) are in contact, and therefore, the pitch of the heat exchanger tubes (3) is smaller than the pitch of the holes (22).
Provided is a pipe clamp apparatus (50) which is small in size and simple in structure and is suitable for a hydraulic tester for testing a quality of a seam welded pipe. According to the present invention, an elevating base (52) which comprises a pipe support body (55) at an upper portion is installed on a fixed base (51) in an elevatable manner. Clamp chucks (56) are installed in a rotatable manner at a position where the pipe support body (55) of the elevating base (52) is inserted. A chuck driving member (58) performing an elevation movement independently of the elevating base (52) is installed in the elevating base (52). Both side portions of the chuck driving member (58) are connected to the clamp chucks (56) at both sides via a link (59) so that the clamp chucks (56) at both sides rotate in a closing direction due to a relative drop against the elevating base (52). A first driving unit (53) which elevates the elevating base (52) and a second driving body (54) which elevates the chuck driving member (58) are installed together at the fixed base (51). Since a drop stroke of the chuck driving member (58) required for a closing operation of the clump chuck (56) is borne in part by an elevation of the elevating base (52) entailed by a pipe transfer, the drop stroke of the chuck driving member (58) for opening and closing the clamp chuck (56) is limited to a low level.
Provided is a squeeze roll stand with which the squeeze rolls can be exchanged easily, and which has a simple equipment configuration. This squeeze roll stand, which is arranged in a junction location of an electro-resistance welded tube manufacturing line, is constructed by combining a stationary unit (10), in which the squeeze rolls are incorporated such that the squeeze rolls, excluding the left/right upper rolls, can be removed, and a movable unit (20), which is placed on top of the stationary unit (10), and in the interior of which the left/right upper rolls are incorporated in a removable manner, and which, with the back side (the downstream side of the line) as the pivot point, tilts from its assembled position on top of the stationary unit (10) to a retracted position toward the back side, which opens the top of the stationary unit (10). The movable unit (20) moves reciprocally between the assembled position and the retracted position with cylinder-type actuators (24) as the drive mechanism (40). In the retracted position the movable unit (20) lies atop bead grinding equipment (50), located on the back side (the downstream side of the line) of the stationary unit (10), with the front face of the movable unit facing upward.
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
The purpose of the present invention is to provide a forming method and a device which are capable of manufacturing a high quality product with high dimensional accuracy by performing a required forming with less additional strain given to a material to be formed without impairing the productivity of a conventional roll forming in forming a round steel pipe, for example. To attain the purpose, in the present invention, in an initial breakdown process, a turning unit having the structure in which a die line using dies having a forming groove which is swingably formed outward turns and moves on an endless track is employed, the dies are turned and moved while being changed to a required angle by locking an edge portion of the material to be formed with the forming groove of the die to attain bending forming, and thus it is possible to remarkably reduce various problems due to a wrapping phenomenon and a high contact stress locally generated by the roll formed.
B21D 5/10 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
Disclosed is a turks head stand that, in a state in which a four-way correcting roll has been mounted in a prescribed position, further adjusts the position of the entire four-way roll in the vertical and horizontal direction, wherein a stacked body of roll chocks/yokes can be extracted from the stand in an orthogonal direction to the direction of movement of products and exchanged. For this purpose, a double-layer inner frame is disposed within an outer frame. The first frame is disposed in a manner enabling positioning exclusively in the vertical direction, and the second frame is disposed within the first frame in a manner enabling positioning exclusively in the horizontal direction. The four-way correcting roll and a positioning device are built within the second frame. A mechanical mechanism of depressed and protruding fittings is disposed on the facing surfaces of the roll chocks/yokes and the inner frame, and the roll chocks/yokes are guided using the lowering motion of the inner frame after the connection with a screw-down device is broken, thereby enabling the stacked body to be successively formed and extracted from the roll stand. The stacked body is released using the upward motion of the inner frame, thereby allowing the roll chocks/yokes to be guided to a prescribed position in the stand and locked.
Disclosed is a molding apparatus in which, to enable the extraction and exchange of a stacked body of roll chocks/yokes from a molding roll stand in an orthogonal direction to the direction of movement of products, a more compact size with a simple structure has been achieved and rolls can be easily exchanged without mounting a hydraulic actuator, or the like, which forms and releases the stacked body, on an inner frame or a roll stand. In order to realize this, the inner frame is disposed within the molding roll stand in raisable manner. A mechanical mechanism of depressed and protruding fittings is disposed on the facing surfaces of the roll chocks/yokes and the inner frame, and the roll chocks/yokes are guided using the lowering motion of the inner frame after the connection with a screw-down device is broken, thereby enabling the stacked body to be successively formed and extracted from the roll stand. The stacked body is released using the upward motion of the inner frame, thereby allowing the roll chocks/yokes to be guided to a prescribed position in the stand and locked.
B21B 31/08 - Interchanging rolls, roll mountings, or stand frames
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
32.
Forming apparatus, shoe thereof and forming method
A forming apparatus and method for forming a sectional profile of round tubing, angled tubing or open forming stock without losing the manufacturability of conventional roll forming The forming apparatus comprises individual shoe blocks having a pass on their rotating curved faces. The shoe blocks can be moved in the circumferential direction on an endless track, and are connected to provide the same curvature radius and length as a required arc segment of a virtual large-diameter circle.
B21C 37/08 - Making tubes with welded or soldered seams
B21C 37/083 - Supply, or operations combined with supply, of strip material
B21D 5/10 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
Disclosed is a shape forming device which is made compact with a simple structure by not attaching a hydraulic actuator, or the like, for forming/breaking up a stacked body, to an inner frame or a roll stand in order to make it possible to draw out a stacked body of a roll chock/yoke in a direction intersecting the advancing direction of a product from a forming roll stand perpendicularly and to replace the stacked body, thereby allowing a roll to be replaced easily. An inner frame is arranged in a forming roll stand so as to be able to elevate/lower freely in order to accomplish the replacing. A machine mechanism is arranged between the opposing surface of each roll chock/yoke and the inner frame. After breaking connection with a screw down device, each roll chock/yoke is guided utilizing the lowering operation of the inner frame to form a stacked body sequentially so that the stacked body can be drawn out from the roll stand. The stacked body is broken up utilizing the elevating operation of the frame, and each roll chock/yoke is guided to a required position in the stand and connected with the screw down device.
B21B 31/10 - Interchanging rolls, roll mountings, or stand frames by horizontally displacing
B21B 31/08 - Interchanging rolls, roll mountings, or stand frames
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
34.
MOLDING APPARATUS AND SHOES THEREOF AND A MOLDING METHOD
Disclosed are a molding apparatus and method that are able to form a required sectional profile by a variety of molding methods, such as roll molding, die molding or shoe molding, etc., when molding round tubing, angled tubing or open molding stock, are able to perform the required molding in any of these molding processes without losing the manufacturability of conventional roll molding and imparting minimal additional deformation to the formed stock, and that can manufacture high-quality goods with high dimensional precision. Disclosed is a molding apparatus that is constituted to be able to substantially realize the use of, for instance, a large molding roller by using an endless shoe block train, in which a multiplicity of individual shoe blocks, which have a pass on their rotating curved faces, and which pass is able to continuously move in the circumferential direction on an endless track, are connected to provide the same curvature radius and length as a required arc segment of a virtual large-diameter circle to the surface of the endless track of the molding segments that come in contact with the stock being formed.
B30B 5/06 - Presses characterised by the use of pressing means other than those mentioned in groups and wherein the pressing means is in the form of an endless band co-operating with another endless band
B21C 37/08 - Making tubes with welded or soldered seams
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
35.
ROLL FORMING METHOD AND FORMING DEVICE OF RECTANGULAR PIPE
A method for producing a rectangular pipe being highly precise in dimension and profile and excellent in internal quality while doubling as a roll by roll-forming a circular pipe into a rectangular pipe without imposing undue burden on those parts of a blank pipe becoming the corner portions and the shoulder portions. Curvature of the surface of a major forming roll in the direction of the axis of rotation is arranged such that linearization of a blank pipe portion (part for a shoulder portion) adjacent to a part for the corner portion of the rectangular pipe precedes other blank pipe parts (other parts for side portions). For example, stands of four-way roll configuration are employed as the uppermost-stream and lowermost-stream forming roll stands, vertical and lateral main forming roll stands of two-way roll configuration are arranged in-between, and a support roll only abutting in the direction intersecting the pair of two-way main forming rolls perpendicularly is disposed in-between, thus balancing the doubling effect as a roll and the facility costs optimally to allow low-cost production.
A device and a method for controlling welding angle capable of eliminating restrictions produced when a conventional floating type control device is adopted to maximally develop the advantages of the floating type control device by adopting a fin roll supporting mechanism and a fin roll adjusting mechanism in manufacturing a welded tube. When the welding angle is controlled by inserting a fin roll between both edges of band materials facing each other before a squeeze roll, the fin roll is mounted on a link mechanism formed of two arms rotatably connected to each other in a plane formed by the direction of a tube manufacturing line and a direction perpendicular to the direction of the tube manufacturing line, and the positions of the holding points of the arm are changed so that the positions of the fin roll in the plane can be adjusted. Thus, the mechanism of the device can be simplified, a mounting space for the device can be reduced, an environment in which the device is used can be remarkably improved, and a load on the maintenance of the device can be remarkably reduced.
B23K 13/00 - Welding by high-frequency current heating
B21D 5/12 - Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
B23K 9/025 - Seam weldingBacking meansInserts for rectilinear seams
patents
