A method for the production of a poppet valve which is armoured in at least the region of a valve seat, comprising providing a substantially cylindrical or cup-shaped semi-finished product produced from a valve steel, which is coated with an armouring material, whereupon the coated semi-finished product is formed into an armoured poppet valve.
A valve rotating device with valve stem seal includes a valve rotating device, with a cylinder head rest and a spring rest intended to bear against a valve spring during operation. The valve rotating device is designed to rotate the spring rest relative to the cylinder head rest during operation. A valve stem seal is attached to the cylinder head rest of the valve rotating device. The valve stem seal being designed to bear against a valve stem and to seal same during rotational and axial movements.
F01L 1/32 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
F01L 3/08 - Valve guidesSealing of valve stem, e.g. sealing by lubricant
The present invention relates to a valve blank (40) and a valve base cover (20) for an internally cooled hollow-stem valve (60) having an optimized friction-weld seam, an internal friction-weld burr being reduced, accommodated in a recess (48) or concealed by a projection.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B23K 33/00 - Specially-profiled edge portions of workpieces for making soldering or welding connectionsFilling the seams formed thereby
The present invention relates to a valve base (2) with a serrated portion (16) which is designed as a stepped-serration portion or saw-tooth serration portion (24) for transmitting a torque during friction welding, and a holding tool (40) for the valve base, the holding tool (40) being provided with a complementary stepped-serration portion or saw-tooth serration portion on one end.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B23K 33/00 - Specially-profiled edge portions of workpieces for making soldering or welding connectionsFilling the seams formed thereby
6.
FRICTION-WELD HOLLOW-STEM VALVE, COMPONENTS THEREOF, AND TOOL FOR ITS MANUFACTURE
The present invention relates to a valve base (2) with a serrated portion (16) which is designed as a stepped-serration portion or saw-tooth serration portion (24) for transmitting a torque during friction welding, and a holding tool (40) for the valve base, the holding tool (40) being provided with a complementary stepped-serration portion or saw-tooth serration portion on one end.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
The invention relates to a lightweight composite component (22) for a valve rotating device (2), comprising: - at least one sheet-metal element (4), which forms a contact surface for a Belleville spring (44), a rolling element (40) or another part of a valve rotating device (2) or of an internal combustion engine; and - a plastics element (6), which is connected to the sheet-metal element (4).
F01L 1/32 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
8.
Method and device for manufacturing hollow, internally cooled valves
A method for shaping a hollow valve preform of a pull rod (20) includes a structuring bulb (22) which is inserted into the cavity (56) of a shaft portion (44) of a valve preform. The structuring bulb (22) has an outer diameter, and has an outer structuring, whereafter the hollow shaft portion (44) is shaped, wherein at least a portion of an inner diameter of the cavity (56) is reduced below an outer diameter of the structuring bulb (22). The structuring bulb (22) is then pulled out through the shaped shaft portion (44), wherein the outer structuring is at least partially pressed into the surface of the cavity (56).
The invention relates to a valve rotating device comprising: a valve stem seal (2) having a valve rotating device (6); a cylinder head support (8); and a spring support (10) intended to rest against a valve spring during operation. The valve rotating device is designed to rotate the spring support relative to the cylinder head support (8) during operation, and a valve stem seal, which is designed to rest against a valve stem and to seal the latter during rotational and axial movements, is fitted to the cylinder head support (8) of the valve rotating device.
F01L 1/32 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
F01L 3/08 - Valve guidesSealing of valve stem, e.g. sealing by lubricant
A method for producing a poppet valve (10) armored at least in the region of a valve seat, comprising the step of providing an essentially cylindrical or cup-shaped semi-finished product (2, 4) made of valve steel (6) that is coated with an armored material (8) and of forming the coated semi-finished product to an armored poppet valve.
A method for producing a valve body of a hollow valve includes providing a workpiece blank or semi-finished product, spin extruding the workpiece to produce a preform having a cup with a hollow shape formed by the cup wall. A hollow valve produced by this method is also provided.
The invention relates to a method for producing a valve body for a hollow valve. Said method comprises the following steps: providing a workpiece, blank or semi-finished product and a forming punch, introducing a protective layer between the workpiece and the forming punch (22) and press forming the workpiece to produce a preform. The invention also relates to a hollow valve produced by means of this method.
A method for producing a cavity valve is provided. The method includes providing a valve body which has a cavity in the interior. The valve body has a circular opening having an opening edge surface on a bottom side. A circular valve cover with a cover edge surface is provided. Inductive heating of at least one of the opening edge surface or the cover edge surface takes place and then welding the valve body to the valve cover by friction welding of the opening edge surface to the cover edge surface.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B23K 13/01 - Welding by high-frequency current heating by induction heating
A production method for a valve body of a hollow valve includes providing a preform with a valve head and a tubular wall which surrounds a cylindrical cavity. The tubular wall is flow formed above a flow forming mandrel which is inserted into the cavity in order to increase a length of the tubular wall. A hollow valve produced by flow forming is also disclosed.
A cover body (2) for a valve rotating device includes a ring-shaped upper part (4) and a ring-shaped lower part (6). The upper part (4) and the lower part (6) are axially spaced apart and are adapted to accommodate an axial spring element (24) therebetween. The upper part (4) and the lower part (6) are connected to one another by at least one connecting piece arranged at the location opposite an insertion position of the axial spring element (24).
A valve rotating device (12) having such a cover body is also provided. A ring-shaped base body (22) has a plurality of pockets (16) oriented in a circumferential direction, in each of which a ball (14) and a tangential spring (32) are arranged. The pockets (16) have a variable depth in the circumferential direction such that inclined raceways (26) for the balls (14) arranged therein are formed. The tangential springs (32) push the balls (14) toward an end of the respective pocket (16). The axial spring element (24) is ring-shaped and a first end of the axial spring element (24) is supported on an ring-shaped stop surface (18) of the base body (22) and a second end of the axial spring element (24) is supported on a surface of the upper part (4) of the cover. A surface of the lower part (6) facing away from the axial spring element (24) rests against the balls (14), and wherein the halls (14) and the axial spring element (24) are arranged overlapping in the axial direction.
A method for producing a cover both (2) for a valve rotating device is also provided.
F01L 1/32 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
F01L 1/46 - Component parts, details, or accessories, not provided for in preceding subgroups
A method for producing a magnetic core for an electromagnetic actuator of an electromagnetic valve train includes punching a core blank from a soft magnetic metal sheet and reshaping the core blank. The core blank has a base segment with an opening and a plurality of wall segments that extend outwardly from an outer edge of the base segment. The plurality of wall segments is bent in a direction substantially perpendicular to the base segment during the reshaping.
H01F 7/06 - ElectromagnetsActuators including electromagnets
H01F 7/08 - ElectromagnetsActuators including electromagnets with armatures
H01F 7/11 - ElectromagnetsActuators including electromagnets with armatures specially adapted for AC reducing or eliminating the effects of eddy currents
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
17.
Method for producing a hollow valve with an optimised interior stem geometry for internal combustion engines
A method for producing a valve body of a hollow valve with optimised interior stem geometry includes a preform with a valve plate and a tubular wall surrounding a cavity. Flow forming the tubular wall over a flow-forming mandrel, which is inserted into the cavity to enlarge a length of the tubular wall. An interior area of the tubular wall is embossed with a structure either due to the fact that the flow-forming mandrel is a structuring mandrel having a surface structure, or alternatively, because the method includes a further step of reducing an outer diameter of the tubular wall by swaging or drawing and ironing over a structuring mandrel. Furthermore, a hollow valve is produced by this method.
The present invention relates to a method for shaping a hollow valve preform by means of a tension rod (20) having a texturing head (22), which is inserted into the cavity (56) of a shaft portion (44) of a valve preform, the texturing head (22) having an outside diameter and an outside texture, whereupon the hollow shaft portion (44) is shaped, at least part of an inside diameter of the cavity (56) being reduced below an outside diameter of the texturing head (22), and then the texturing head (22) is pulled out through the shaped shaft portion (44), the outside texture being at least partially pressed into the surface of the cavity (56).
A method for manufacturing an internally cooled valve (2), includes providing a valve body (4) having a valve stem (6) that ends in a valve head (8). The valve body (4) has a cavity (10) that is open toward the valve head (8) and with a valve base element (12) by friction welding the valve base element (12) to the valve head (8). The valve bottom element (12) is preferably a sintered component.
F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
F01P 3/14 - Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
B22F 3/22 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor for producing castings from a slip
20.
Process and device for manufacturing hollow, internally cooled valves
A matrix for shaping a valve preform has a circular through opening and a reduced conical section. The reduced conical section tapers from an outer diameter to a reduced cone inner diameter, the outer diameter being greater than or equal to the initial outer diameter of the valve preform, and the matrix inner diameter being smaller than the initial outer diameter.
A internally cooled poppet valve (2) with inertial pump (4) includes a valve body (20) having a valve head (22) and a valve stem (24). The valve body (20) has a closed cavity (26), in which a cooling fluid (28) is disposed. The inertial pump (4) is disposed in the valve body (20), which moves the cooling fluid (28) in the cavity during operation.
An internally cooled valve (2) includes a valve body having a valve head (4) and a valve stem (6). The valve body has at least one cavity (8) in which coolant (10) is situated. The coolant is a nanofluid (12) in which nanoparticles (14) are dispersed in a dispersion medium (16).
A valve rotating device has an annular main body, an annular cover body, and an annular axial spring element. The main body has multiple pockets of variable depth so that raceways are formed for balls situated therein, wherein tangential springs press the balls against ends of the pockets in the circumferential direction. The cover body is rotatable relative to the main body about an axis and is axially displaceable, and has an annular first support element, an annular second support element, and a connection, wherein the support elements are axially spaced apart from one another and the connection connects the support elements so that they are fixed relative to one another. The axial spring element at a first end rests on an annular stop surface of the main body, and at a second end rests on a surface of the first support element, wherein the axial spring element is situated between the first support element and the second support element. A surface of the second support element facing away from the axial spring element rests against the balls, and the balls and the axial spring element are arranged in an overlapping manner in the axial direction.
F01L 1/32 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
F01L 1/46 - Component parts, details, or accessories, not provided for in preceding subgroups
F16K 29/02 - Arrangements for movement of valve members other than for opening or closing the valve, e.g. for grinding-in, for preventing sticking providing for continuous motion
F16K 29/00 - Arrangements for movement of valve members other than for opening or closing the valve, e.g. for grinding-in, for preventing sticking
The invention relates to a poppet valve (2) which has improved sliding characteristics, comprising a valve head (4), a valve shaft 6, and a valve shaft end. A sliding surface SL is extending along said valve shaft 6 between said valve head (4) and said valve shaft end (8). Said sliding surface SL is provided with at least one recess (10, 12, 14, 16, 18).
The present invention for coating a valve head (6) of an inlet and/or outlet valve (4) comprises a preparation of a surface, which is to be coated, of the valve (4) for a coating, and a coating of the prepared surface with a ceramic high-temperature coating (22).
B05D 3/04 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
26.
METHOD FOR PRODUCING A HOLLOW VALVE FOR INTERNAL COMBUSTION ENGINES
The invention relates to a method for producing a valve body for a hollow valve. Said method comprises the following steps: providing a workpiece, blank or semi-finished product and a forming punch, introducing a protective layer between the workpiece and the forming punch (22) and press forming the workpiece to produce a preform. The invention also relates to a hollow valve produced by means of this method.
The invention relates to a method for producing a valve body of a hollow valve. Said method comprises the following steps: providing a preform having a valve body/valve plate and a tubular shaped wall which surrounds a hollow chamber; and axial, feed and transverse rolling the tubular shaped wall with at least of pressing roller in order to expand a length of the tubular wall, in which the preform is moved with respect to the at least one pressing roller. The invention also relates to a hollow valve produced by means of this method.
B21D 22/16 - Spinning over shaping mandrels or formers
B21D 51/10 - Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
B21D 51/16 - Making hollow objects characterised by the use of the objects
B21D 53/84 - Making other particular articles other parts for engines, e.g. connecting-rods
F01L 3/00 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing facesParts or accessories thereof
B21H 1/18 - Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely
B21H 7/00 - Making articles not provided for in groups , e.g. agricultural tools, dinner forks, knives, spoons
B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
B21D 31/06 - Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering, beating, peen forming
28.
METHOD FOR PRODUCING A HOLLOW VALVE FOR INTERNAL COMBUSTION ENGINES
The invention relates to a method for producing a valve body of a hollow valve. Said method comprises the following steps: providing a workpiece, blank or semi-finished product, spin extruding the workpiece to produce a preform which comprises a cup having a hollow shape formed by the cup wall. The invention also relates to a hollow valve produced by means of this method.
The present invention relates to an internally cooled valve (2), having a valve body (4) which comprises a valve stem (6) and a valve head (8), wherein a cavity (10) in the valve body (4) extends from the valve stem (6) into the valve head (8) and has a greater diameter (D) in the valve head region (12) than in a valve stem region (14). An equalising channel (16) is arranged in the valve (2) and extends between the valve stem region (14) of the cavity into a valve head region (14) of the cavity (10).
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
F01P 3/14 - Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
30.
METHOD AND DEVICES FOR EMBOSSING SURFACE STRUCTURES INTO AN INSIDE OF A PIPE OR A VALVE SHAFT OF A POPPET VALVE AND POPPET VALVE HAVING AN EMBOSSED INNER STRUCTURE
The invention relates to an embossing tool (4) for embossing a structure in an inside of a pipe, comprising at least three embossing stamps (6) and a wedge (20), wherein each of the at least three embossing stamps (6) has an outer, in the radial direction, stamp or embossing surface (16), which has a structure (18), which corresponds to a negative form of the structure to be embossed, wherein the stamp surface (16) is curved about a straight line, which is parallel to the center axis, two flank surfaces (14), which are at an angle to each other, and the section line of which is parallel to the center axis, and a wedge inner surface (10), which is inclined relative to the center axis and intersects each of the two flank surfaces (14) at an identical angle, wherein the wedge has at least three wedge outer surfaces (22), each of which have the same angle relative to the center axis, and wherein each of the wedge outer surfaces (22) have an identical angle relative to the respectively adjacent wedge outer surfaces (22).
A hollow valve having optimized interior stem geometry, whose valve stem has surface-enlarging structuring on an inner surface is provided. Also provided is a method for manufacturing a valve body of such a hollow valve, wherein the method comprises: providing a bowl-shaped semi-finished product having an annular wall that surrounds a cavity, and having a base section, followed by lengthening the wall with an inserted, structured mandrel, and lastly, reducing an outer diameter of the annular wall without a mandrel to obtain a predetermined valve stem outer diameter of a valve to be manufactured.
Disclosed is a method for the production of a valve body of a hollow chamber valve, said method comprising: providing a bowl-shaped semi-finished product having an annular wall, which surrounds a hollow chamber, and a bottom portion, followed by a lengthening of the wall and a final reducing of an outer diameter of the annular wall in order to obtain a predetermined valve shaft outside diameter of a valve that is to be produced. Further disclosed is a hollow chamber valve produced by means of said method.
A method for manufacturing a poppet valve or mushroom valve includes providing a mixture of metal powder and a binder, filling and pressing said mixture in a mold, to obtain a green product, removing the binder from the green product, and thermally sintering the green product to a poppet valve blank, by hot isostatic pressing. A poppet valve is also provided that is manufactured with this method.
F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group
F16K 3/24 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
B22F 3/14 - Both compacting and sintering simultaneously
The invention relates to a method for producing a cavity valve. The method comprises: providing a valve body, which has a cavity in the interior, the valve body having, on a bottom side, a circular opening having an opening edge surface; providing a circular valve cover having a cover edge surface; inductively heating at least one of the opening edge surface or the cover edge surface; and welding the valve body to the valve cover by friction welding the opening edge surface to the cover edge surface.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
35.
Internally cooled poppet valve for internal combustion engine
A poppet valve (2) with a valve body (4) has a cavity (6), a coolant inlet port (8). A coolant outlet port (10). The coolant inlet port (8) and the coolant outlet port (10) are arranged on a valve stem (12) of the poppet valve (2). The cavity (6) extends into the valve stem (12) of the poppet valve (2) and into a valve head (14) of the poppet valve (2), wherein there is provided a coolant conducting element (16) within the cavity (6) and extending into the cavity (6) from the valve head (14) to the valve stem (12), where the coolant conducting element (16) in each case has a cross-section. The coolant conducting element (16) includes a pipe section (18) and a funnel section (20), and the coolant conducting element (16) extends concentrically to the poppet valve (2) in the cavity (6) of the poppet valve (2).
The invention relates to a method for producing poppet valves, the method including: cross-wedge rolling a preform (2), which has at least one disk portion (4) and a shaft portion, to produce a valve blank (10), wherein a diameter of the shaft portion (6) is reduced substantially to a shaft diameter of a shaft (16), and additionally a length of the shaft portion (6) is increased substantially to a length of the shaft (16) by means of a rolling-out process.
Disclosed is a production method for a valve body of a hollow valve, said method comprising: providing a preform with a valve plate and a tubular wall, which surrounds a hollow chamber; and roller spinning the tubular wall by means of a roller mandrel introduced into the hollow space in order to increase a length of the tubular wall. Further disclosed is a hollow valve produced by means of said method.
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
38.
METHOD FOR PRODUCING A HOLLOW VALVE HAVING OPTIMISED SHAFT INNER GEOMETRY FOR COMBUSTION ENGINES, AS WELL AS A HOLLOW VALVE PRODUCED BY MEANS OF THIS METHOD
The invention relates to a production method for a valve body of a hollow valve with optimised shaft inner geometry, said method comprising the following steps: providing a preform (6) with a valve plate (12) and with a tubular wall (14), which surrounds a hollow space (8); and flow forming the tubular wall (14) via a flow forming mandrel (22) introduced into the hollow space in order to increase a length of the tubular wall (14). An inner surface of the tubular wall (14) is imprinted with a structure, wherein either the flow forming mandrel (22) is a structuring mandrel having a surface structure, or alternatively, the method also includes, as a further step, a reducing of an outer diameter of the tubular wall via rotary swaging or ironing over a structuring mandrel. The invention also relates to a hollow valve produced by means of this method.
B21D 53/10 - Making other particular articles parts of bearingsMaking other particular articles sleevesMaking other particular articles valve seats or the like
B21D 22/16 - Spinning over shaping mandrels or formers
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
39.
Inside-cooled disc valve and a semi-finished product and method for its production
A method for the production for a semi-finished valve product (4), includes casting, forging, deep-drawing, pressing and/or drop-welding of one or several metal material into a semi-finished valve product (4) that corresponds to a circle segment of a valve cut open in the axial direction. A valve is produced by welding together at least two semi-finished valve products (4) into an internally cooled valve, with the weld running in the axial direction of the valve.
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
F01L 3/06 - Valve members or valve seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group
F16K 1/32 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces Details
F16K 49/00 - Means in or on valves for heating or cooling
40.
SHAPED MAGNETIC CORE FOR AN ELECTROMAGNETIC ACTUATOR, AND METHOD FOR PRODUCING SAME
Method for producing a magnetic core for an electromagnetic actuator of an electromagnetic valve drive, wherein the method comprises punching a core blank from a soft-magnetic sheet metal and shaping the core blank. The core blank comprises a base segment with an opening, and several wall segments extending outwards from an outer edge of the base segment. In the shaping process, the several wall segments are bent in a direction substantially perpendicular to the base segment.
H01F 7/11 - ElectromagnetsActuators including electromagnets with armatures specially adapted for AC reducing or eliminating the effects of eddy currents
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
The present invention relates to an internally cooled poppet valve (2) with inertial pump (4), comprising a valve body (20) having a valve head (22) and a valve stem (24), wherein the valve body (20) comprises a closed cavity (26), in which a cooling fluid (28) is disposed, and wherein further an inertial pump (4) is disposed in the valve body (20), which moves the cooling fluid (28) in the cavity during operation.
Disclosed is a matrix for shaping a valve blank, said matrix having a round through-hole and a truncated-conical section which tapers from an outer diameter to an inner diameter of a truncated cone, the outer diameter being larger than or equal to the initial outer diameter of the valve blank, and the inner diameter of the matrix being smaller than the initial outer diameter.
B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
B21C 1/22 - Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles
B21C 1/24 - Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes specially adapted for making tubular articles by means of mandrels
B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
43.
INTERNALLY COOLED VALVE HAVING A VALVE BOTTOM, AND METHOD FOR THE PRODUCTION THEREOF
The present invention relates to a method for producing an internally cooled valve (2), which comprises providing a valve body (4) having a valve stem (6) that ends in a valve head (8), wherein the valve body (4) has a cavity (10) that is open towards the valve head (8), providing a valve bottom element (12), and closing the cavity (10) with the valve bottom element (12) by friction welding the valve bottom element (12) to the valve head (8), wherein the valve bottom element (12) is preferably a sintered component.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
F01L 3/00 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing facesParts or accessories thereof
The invention relates to a valve rotating device having an annular main body, an annular cover body and an annular axial spring element. The main body has a plurality of pockets of variable depth such that raceways for balls located therein are formed, wherein tangential springs press the balls against ends of the pockets in the circumferential direction. The cover body can be rotated about an axis relative to the main body and can be displaced axially and has an annular first support element, an annular second support element and a connection means, wherein the support elements are spaced axially from one another and the connection means connects the support elements such that they are fixed relative to one another. A first end of the axial spring element rests on an annular contact surface of the main body and a second end rests on a surface of the first support element, wherein the axial spring element is arranged between the first support element and the second support element. A surface of the second support element, which is remote from the axial spring element, abuts the balls, and the balls and the axial spring element are arranged so as to overlap in the radial direction.
F01L 1/32 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for rotating lift valves, e.g. to diminish wear
45.
INTERNALLY COOLED VALVE FOR AN INTERNAL COMBUSTION ENGINE
The invention relates to an internally cooled valve (2) comprising a valve body having a valve head (4) and a valve stem (6), wherein the valve body has at least one cavity (8) in which coolant (10) is arranged, which is a nanofluid (12), in which nanoparticles (14) are dispersed in a dispersion medium (16).
The invention relates to a process for manufacturing an internally cooled valve, said process involving providing an externally at least partly cylindrical semifinished product (2), creating or increasing the depth of an at least partly cylindrical cavity in the semifinished product (2) in a hot-working procedure using a male die such that a valve blank is formed; during the hot-working procedure, a recess on an end face of the male die forms a structure on the bottom of the cavity.
The invention relates to a cavity valve with an optimized shaft interior geometry, the valve shaft of said valve having a surface-increasing structure on the inner surface. The invention additionally relates to a method for producing a valve body of such a cavity valve, said method having the steps of: providing a cup-shaped semi-finished product with an annular wall which surrounds a cavity and with a base section; followed by a lengthening of the wall using an inserted structured mandrel; and a subsequent reducing of the outer diameter of the annular wall without using the mandrel in order to obtain the specified valve shaft outer diameter of a valve to be produced.
Disclosed is a method for the production of a valve body of a hollow chamber valve, said method comprising: providing a bowl-shaped semi-finished product having an annular wall, which surrounds a hollow chamber, and a bottom portion, followed by a lengthening of the wall and a final reducing of an outer diameter of the annular wall in order to obtain a predetermined valve shaft outside diameter of a valve that is to be produced. Further disclosed is a hollow chamber valve produced by means of said method.
A poppet valve for a combustion engine is provided comprising a valve body with a valve stem and a valve head, wherein the valve comprises at least one protrusion of a predetermined shape located on the valve stem; wherein the at least one protrusion is formed by at least one weld seam obtained by depositing material on an outer surface of the valve stem with a welding process. Further, a method for producing a poppet valve having a protrusion on the valve stem is provided.
F01L 3/06 - Valve members or valve seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
A poppet valve for a combustion engine is provided comprising a valve body with a valve stem and a valve head, wherein the valve comprises at least one protrusion of a predetermined shape located on the valve stem; wherein the at least one protrusion is formed by at least one weld seam obtained by depositing material on an outer surface of the valve stem with a welding process. Further, a method for producing a poppet valve having a protrusion on the valve stem is provided.
F01L 3/06 - Valve members or valve seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group
The present invention relates to a method for manufacturing a poppet valve or mushroom valve, comprising: providing a mixture of metal powder and a binder, filling and pressing said mixture in a mold, to obtain a green product, removing the binder from said green product, and thermally sintering said green product to a poppet valve blank, by hot isostatic pressing, and also to a poppet valve manufactured with said method.
B22F 3/22 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor for producing castings from a slip
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
F01L 3/00 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing facesParts or accessories thereof
52.
Valve for internal combustion engines having a guide vane for coolant
An internally cooled inlet or outlet valve for internal combustion engines, has a valve disc, a valve stem and a cavity inside the valve stem and the valve disc. A coolant is arranged in the cavity, wherein the cavity is provided with at least one guide vane for the coolant.
It is disclosed a poppet valve (2) with a valve body (4) which has a cavity (6), a coolant inlet port (8), and a coolant outlet port (10); wherein the coolant inlet port (8) and the coolant outlet port (10) are arranged on a valve stem (12) of the poppet valve (2), wherein the cavity (6) extends into the valve stem (12) of the poppet valve (2) and into a valve head (14) of the poppet valve (2), wherein there is provided a coolant conducting element (16) within the cavity (6) and extending into the cavity (6) from the valve head (14) to the valve stem (12), where the coolant conducting element (16) in each case has a cross-section, wherein the coolant conducting element (16) includes a pipe section ( 18) and a funnel section (20), wherein the coolant conducting element (16) extends concentrically to the poppet valve (2) in the cavity (6) of the poppet valve (2).
The invention relates to a method for producing poppet valves, the method including: cross-wedge rolling a preform (2), which has at least one disk portion (4) and a shaft portion, to produce a valve blank (10), wherein a diameter of the shaft portion (6) is reduced substantially to a shaft diameter of a shaft (16), and additionally a length of the shaft portion (6) is increased substantially to a length of the shaft (16) by means of a rolling-out process.
Method for the production of a semi-finished valve product (4), comprising casting, forging, deep-drawing, pressing and/or drop-welding of one or several metal materials into a semi- finished valve product (4) that corresponds to a circle segment of a valve cut open in the axial direction, and production of a valve by welding together at least two semi-finished valve products (4) into an internally cooled valve, with the weld running in the axial direction of the valve.
The invention relates to a method for producing an internally cooled valve (2). Said method comprises the steps of inserting a valve semi-finished product (16) into a die (28, 30), wherein the valve semi-finished product (16) has a valve stem (18) and a valve head (20), wherein the valve semi-finished product (16) further has a recess (22) that extends from the valve stem (18) through the valve head (20) and opens towards the valve head (20), inserting a valve bottom (24) into the die, and fire-welding the valve bottom (24) and the valve semi-finished product (16) in the die (28, 30) under high pressure to form a valve blank (26).
F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
B23K 20/02 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press
B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
The invention relates to a method for coating a valve head (6) of an intake and/or exhaust valve (4) comprising: preparing a surface of the valve (4) to be coated for a coating, and coating the prepared surface with a ceramic high-temperature coating (22).
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
59.
INTERNALLY COOLED VALVE FOR INTERNAL COMBUSTION ENGINES, AS WELL AS METHOD AND DEVICE FOR THE PRODUCTION THEREOF
The invention relates to a method and a device for producing an internally cooled inlet or outlet valve (4) for internal combustion engines, as well as the valve produced using the method or the device. The method comprises providing a work piece comprising a cylindrical shaft and a cylindrical hole running from a valve shaft end in the axial direction. The method also comprises deforming the valve shaft end via form rolling the cylindrical shaft to a smaller diameter, wherein a diameter of the cylindrical hole is reduced wherein the cylindrical hole remains intact. The method further comprises deforming the section of the work piece connected to the valve shaft to form a valve head via form rolling.
The invention relates to a cooled inlet or outlet valve (4) for internal combustion engines, comprising a valve disc (6), a valve stem (8), and a hollow space (10) inside the valve stem (8) and the valve disc (6). A coolant (12) is arranged in the hollow space (10). The valve is designed comprising at least two parts and has on a valve disc surface (22) an opening (18) which is closed by a cover (20), wherein the cover (20) is additionally provided with at least one relief groove (34) which relieves a joint (32) between the opening (18) in the valve disc surface (22) and the cover (20).
The present invention relates to an internally cooled intake or exhaust valve (4) for internal combustion engines, having a valve disk (6), a valve stem (8) and a cavity (10) within the valve stem (8) and the valve disk (6). A coolant (12) is provided in the cavity (10), the cavity (10) being provided with at least one guide vane (14, 16) for the coolant (12).
The method of forming hard facing on an engine valve comprising providing an engine valve, providing an austenitic iron-based alloy, the austenitic iron-based alloy including, by weight, about 0.25% to about 0.9% carbon, about 1.5% to about 3.5% boron, about 1% to about 2% silicon, at least 20% chromium, an amount of manganese effective to provide the iron-based alloy with an austenitic structure, and the balance including iron and incidental impurities, and welding the austenitic iron-based alloy to at least a portion of the engine valve.
