The invention relates to a grinding disc unit (400) for use in a lateral surface grinding machine, comprising a main part (410) which defines a disc rotational axis (402) and which is installed or can be installed on a tool spindle such that the disc rotational axis (402) runs coaxially to the spindle axis, wherein a circumferential region (412) of the main part (410) has a plurality of installation regions (420) which are offset to one another in the circumferential direction of the main part and which comprise securing devices for securing a respective exchangeable tool segment (500) to the main part (410). A tool segment (500) has a cutting means support (510), which comprises installation structures for securing the cutting means support in one of the installation regions, and a cutting fitting (520) on a cutting fitting side, said cutting fitting forming an abrasive functional surface of the tool segment. The abrasive functional surfaces of the cutting fittings are arranged on a lateral surface of the grinding disc unit, said lateral surface being oriented perpendicularly to the disc rotational axis, within an annular functional region (430) at a radial distance to the disc rotational axis (402). At least one tool segment has a segmented cutting fitting (520) on the cutting fitting side of the cutting means support, said segmented cutting fitting comprising at least two cutting material bodies which are arranged in a mutually spaced manner.
B24D 7/06 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front faceBushings or mountings therefor with inserted abrasive blocks, e.g. segmental
B24D 7/14 - Zonally-graded wheelsComposite wheels comprising different abrasives
B24B 7/17 - Single-purpose machines or devices for grinding end faces, e.g. of gauges, rollers, nuts or piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders
2.
GRINDING DISC UNIT FOR A LATERAL SURFACE GRINDING MACHINE
The invention relates to a grinding disc unit (400) for use in a lateral surface grinding machine, comprising a main part (410) which defines a disc rotational axis (402) and which is installed or can be installed on a tool spindle such that the disc rotational axis (402) runs coaxially to the spindle axis, wherein a circumferential region (412) of the main part (410) has a plurality of installation regions (420) which are offset to one another in the circumferential direction of the main part and which comprise securing devices for securing a respective exchangeable tool segment (500) to the main part (410). A tool segment (500) has a cutting means support (510), which comprises installation structures for securing the cutting means support in one of the installation regions, and a cutting fitting (520) on a cutting fitting side, said cutting fitting forming an abrasive functional surface of the tool segment. The abrasive functional surfaces of the cutting fittings are arranged on a lateral surface of the grinding disc unit, said lateral surface being oriented perpendicularly to the disc rotational axis, within an annular functional region (430) at a radial distance to the disc rotational axis (402). An installation region (420) has a receiving device (440) with stop surfaces for receiving a tool segment (500) in a defined position and a quick-clamping device (470) which can be switched between an open configuration and a clamping configuration, wherein in the open configuration, a tool segment (500) can be inserted into the receiving device (440) or can be removed from the receiving device, and in the clamping configuration, the tool segment is pressed against the stop surfaces and can be fixed on the main part (410) in a specified position.
B24D 7/06 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front faceBushings or mountings therefor with inserted abrasive blocks, e.g. segmental
B24D 7/14 - Zonally-graded wheelsComposite wheels comprising different abrasives
B24B 7/17 - Single-purpose machines or devices for grinding end faces, e.g. of gauges, rollers, nuts or piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders
3.
EXCHANGEABLE TOOL ELEMENT FOR GRINDING DISC UNIT OF A LATERAL SURFACE GRINDING MACHINE AND GRINDING DISC UNIT
An exchangeable tool segment (500) for use in a grinding disc unit of a lateral surface grinding machine has a cutting means support (510) which has mounting structures for fastening the cutting means support in a mounting region provided at the circumferential region of the main body of the grinding disc unit. The main body has, on its circumference, many mounting regions each for mounting one tool segment. On a cutting layer side (515), the cutting means support has, in the operationally ready state, a cutting layer (520) which forms an abrasive effective surface of the tool segment. The abrasive effective surfaces of the cutting layers are, in an operationally ready state of the cutting disc unit, arranged in a side surface of the cutting disc unit within an annular effective region with a radial distance to the disc rotational axis, said side surface being oriented perpendicularly to the disc rotational axis. The cutting means support (510) defines a longitudinal direction (L), a width direction (B) perpendicular thereto and a height direction (H) perpendicular to the longitudinal direction and the width direction, and can be mounted on the main support such that, in the mounted state, the longitudinal direction (L) is oriented tangentially to the disc rotational axis, the width direction is oriented substantially in the radial direction and the height direction is oriented parallel to the disc rotational axis. The cutting means support furthermore has a bottom side (512), an outer side (513), an inner side (514) opposite thereto in the width direction (B) and a cutting layer side (515) opposite the bottom side in the height direction and end faces oriented transverse to the longitudinal direction. In the region of the end faces, a bevel is in each case formed such that the cutting means support has, in the section along a sectional plane oriented perpendicular to the height direction between the bevels, a trapezoid shape such that the cutting means support is longer on the inner side (514) than on the outer side.
4.
HONING TOOL AND METHOD FOR PRODUCING A HONING TOOL
The invention relates to a honing tool (100) for machining the inner surface of a bore in a workpiece by means of at least one honing operation, comprising: a tool body (110) that defines a tool axis (112) and has a guide bore (115), which is coaxial to the tool axis, for receiving two adjusting elements which can be moved axially independently of each other, and a plurality of guide openings (160) which are distributed over the circumference of the tool body (110) and lead radially relative to the tool axis (112) from the guide bore (115) to an outer face of the tool body; a plurality of cutting means supports which each have a support section (152) that is wide in the circumferential direction and comprises an outer face for receiving cutting means, and have an adjusting section (158) that is narrower than the support section and has an inclined surface on the inner face facing away from the outer face for interacting with an associated inclined surface of one of the two adjusting elements. The adjusting sections of cutting means supports are each radially movably received in one of the guide openings. All the cutting means supports which can be adjusted via the first adjusting element form a first cutting group, and all the cutting means supports which can be adjusted via the second adjusting element form a second cutting group, wherein the tool body (110) has fourteen or more guide openings (160) which have an irregular angular division such that one or more of the guide openings has a different angular spacing (WA) from the directly adjacent guide openings in the circumferential direction.
The invention relates to a honing tool (100) for machining the inner surface of a bore in a workpiece by means of at least one honing operation, comprising: a tool body (110) that defines a tool axis (112) and has a guide bore (115), which is coaxial to the tool axis, for receiving two adjusting elements which can be moved axially independently of each other, and a plurality of guide openings (160) which are distributed over the circumference of the tool body (110) and lead radially relative to the tool axis (112) from the guide bore (115) to an outer face of the tool body; a plurality of cutting means supports which each have a support section (152) that is wide in the circumferential direction and comprises an outer face for receiving cutting means, and have an adjusting section (158) that is narrower than the support section and has an inclined surface on the inner face facing away from the outer face for interacting with an associated inclined surface of one of the two adjusting elements. The adjusting sections of cutting means supports are each radially movably received in one of the guide openings. All the cutting means supports which can be adjusted via the first adjusting element form a first cutting group, and all the cutting means supports which can be adjusted via the second adjusting element form a second cutting group, wherein the tool body (110) has fourteen or more guide openings (160) which have an irregular angular division such that one or more of the guide openings has a different angular spacing (WA) from the directly adjacent guide openings in the circumferential direction.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
A honing tool (100) for machining an inner face of a bore in a workpiece with the aid of at least one honing operation comprises a tool body (110) that defines a tool axis (112); a first cutting group (160-1), attached to the tool body, having a plurality of radially feedable first carriers (150-1) that are feedable radially with respect to the tool axis (112) by means of an associated first cutting group feeding system (170-1), wherein each first carrier covers, on its radial outer side, a circumferential angle range of at least 20° and carries, on its outer side (154), a single first cutting material body that is wide in the circumferential direction or a plurality of narrow first cutting material bodies (140-1), which are arranged in a manner spaced apart from one another; and a second cutting group (160-2), attached to the tool body, having a plurality of radially feedable second carriers (150-2) that are feedable radially with respect to the tool axis (112), independently of the first carriers (150-1), by means of an associated second cutting group feeding system (170-2), wherein each second carrier (150-2) carries, on its radial outer side (154), a single narrow second cutting material body (140-1, 140-2). All the cutting material bodies (140-1, 140-2) of the first and the second cutting group are arranged in an axially short cutting region (130) that has a length, measured in the axial direction, which is much less than an effective outside diameter of the cutting groups with the cutting material bodies fully retracted.
A honing tool (100) for processing an inner surface of a bore in a workpiece by the means of at least one honing operation comprises a tool body (110), which defines a tool axis (112); a first cutting group (160-1) attached to the tool body and having a plurality of radially adjustable first carriers (150-1), which are adjustable radially in relation to the tool axis (112) by means of an associated first cutting group adjustment system (170-1), each first carrier on its radial outer side covering a peripheral angular range of at least 20° and on the outer side (154) carrying a single first cutting material body, which is broad in the peripheral direction, or a plurality of narrow first cutting material bodies (140-1), which are arranged at a mutual distance from one another; and a second cutting group (160-2) which is attached to the tool body and has a plurality of radially adjustable second carriers (150-2), which are adjustable radially in relation to the tool axis (112) by means of an associated second cutting group adjustment system (170-2) independently of the first carriers (150-1), each second carrier (150-2) carrying an individual narrow second cutting material body (140-1, 140-2) on its radial outer side (154). All cutting material bodies (140-1, 140-2) of the first and second cutting group are arranged in an axially short cutting region (130), which has a length, measured in the axial direction, which is substantially smaller than an effective outer diameter of the cutting groups when the cutting material bodies are fully retracted.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
The invention relates to a honing method for machining the inner surface of a borehole in a workpiece by means of at least one honing operation, wherein, during a honing operation, an expandable honing tool coupled to a spindle is moved back and forth inside the borehole in the axial direction of the borehole in order generate a stroke movement and, at the same time, is rotated in order to generate a rotational movement superimposed on the stroke movement. A borehole shape that is rotationally symmetrical with respect to a borehole axis and deviates from the circular cylinder shape is generated with an axial contour profile. In order to generate an axially varying material removal, a stroke length and/or a stroke position of the stroke movement is varied in at least one stroke variation phase. Before the honing operation is started, an axial target contour profile is defined, which represents the dependence of the target diameter on the axial position in the borehole to be machined. Based on the target contour profile, a stroke variation profile is specified for the stroke variation phase. During the stroke variation phase, a measurement of the actual diameter of the borehole is carried out in order to determine a diameter measurement signal, which represents the actual diameter of the borehole in a measured borehole section, and a target-actual comparison is carried out between the determined actual diameter and an associated target diameter in order to determine a diameter deviation. During the stroke variation phase, at least one honing parameter influencing the material removal, e.g. the stroke speed, the rotational speed, the delivery speed and/or the delivery force, is variably controlled according to the result of the target-actual comparison.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
B24B 49/04 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
B24B 33/06 - Honing machines or devicesAccessories therefor with controlling or gauging equipment
9.
HONING TOOL AND FINE MACHINING METHOD USING THE HONING TOOL
A honing tool (100) for machining an inner face (322) of a bore (320) in a workpiece (300) with the aid of at least one honing operation comprises a tool body (110) that defines a tool axis, and an expandable cutting group (330), attached to the tool body, having a plurality of radially feedable cutting material body carriers (150) that each cover a circumferential angle range and are feedable radially with respect to the tool axis by means of a cutting group feeding system assigned to the cutting group. Each cutting material body carrier carries, on its radial outer side, a plurality of narrow cutting material bodies (140) configured as cutting material strips (140-1, 140-2, 140-3, 440-1, 440-2) that are narrow in the circumferential direction and have a width in the circumferential direction that is small compared with the axial length of the cutting material strips. The cutting material bodies are arranged at a mutual spacing from one another. An elastically resilient intermediate layer (160) is arranged in an intermediate space between a cutting material body (140) and the cutting material body carrier (150) carrying the cutting material body, said intermediate layer (160) filling the intermediate space between the cutting material body and the cutting material body carrier. A preferred field of application is the honing of cylinder surfaces in the production of cylinder blocks or cylinder liners for reciprocating piston engines.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
The invention relates to a precision machining method for producing a non-circular-cylindrical bore (110), which has at least one non-circular-cylindrical bore section having a non-round bore cross section and/or an axial contour course, which method uses a machine tool (400) comprising a main spindle (410) that is rotatable about a main spindle axis (412) by means of a first drive (440) and displaceable parallel to the main spindle axis by means of a second drive (450). Starting from an initial shape, the bore (110) is brought to a non-circular-cylindrical bore shape by means of a grinding operation with axially and/or azimuthally non-uniform material removal. Thereafter, the inner surface of the bore is finally machined by means of at least one further machining operation. A grinding tool unit (500) is coupled to the main spindle (410). The grinding tool unit has a base (520) that is rotatable about a base axis (522) and carries at least one grinding spindle unit (550) having a grinding tool (560) that is driven in rotation about an grinding tool axis (562) by means of a grinding tool drive (580). By producing working movements of the grinding tool (560), a grinding operation is carried out, wherein the grinding tool (560) is rotated at a predefinable speed in order to produce material removal on the bore inner surface (115); an abrasive circumferential surface (567) of a grinding element (565) of the grinding tool is brought locally into engagement with the bore inner surface (115) by one-sided feeding of the grinding tool in the direction of the bore inner surface; an axial position of the grinding tool (560) in the bore is controlled by activating the second drive (450); an angular position of the grinding tool (560) in the bore is controlled by activating the first drive (440); and a local material removal rate in the local engagement area between the grinding element (565) and the bore inner surface (115) is controlled via a variation in the feed rate of the grinding tool and/or via a variation in the speed of the grinding element and/or via a variation in the contact time between grinding element and bore inner surface.
B24B 5/40 - Single-purpose machines or devices for grinding tubes internally
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
B24B 47/12 - Drives or gearings for grinding machines or devicesEquipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
The invention relates to a honing method for machining the inner surface (214) of a bore (210) in a workpiece (200) by means of at least one honing operation, wherein, during a honing operation, an expandable honing tool (150) coupled to a spindle is moved back and forth inside the bore in the axial direction of the bore in order generate a reciprocating motion and, at the same time, is rotated in order to generate a rotational motion superposed on the reciprocating motion. A bore shape that is rotationally symmetrical with respect to a bore axis (212) and that deviates from the circular cylinder shape and that has an axial contour profile is produced. In order to generate axially varying material removal, a stroke length and/or a stroke position of the reciprocating motion is varied in at least one stroke variation phase. A honing tool (150) having an annular cutting group (155) having a plurality of cutting material bodies (156), which are distributed around the periphery of a tool body (152) and which can be radially advanced, is used. The honing method is characterized in that, during the stroke variation phase, the actual diameter of the bore (210) is measured in order to determine a diameter measurement signal, which represents the actual diameter of the bore in a measurement plane, and the stroke length and/or the stroke position of the reciprocating motion is controlled in accordance with the diameter measurement signal. The invention further relates to a machine tool suitable for carrying out the honing method. The honing method is particularly suited for honing cylinder walls in the production of cylinder blocks or cylinder liners for reciprocating-piston machines.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
A honing tool (100) for machining an inner surface (322) of a borehole (320) in a workpiece (300) with the help of at least one honing operation comprises a tool body (110), which defines a tool axis, and an expandable cutting group (330), which is attached to the tool body and has a plurality of cutting material body supports (150), which can be radially advanced and which each cover a circumferential angle range, and can be radially advanced with respect to the tool axis by means of a cutting group advancing system associated with the cutting group. Each cutting material body support carries, on its radial outer side, a plurality of narrow cutting material bodies (140), which are formed as narrow cutting material strips (140-1, 140-2, 140-3, 440-1, 440-2) in the circumferential direction and have a width, in the circumferential direction, that is small in relation to the axial length of the cutting material strips. The cutting material bodies are arranged spaced apart from each other. In an intermediate space between a cutting material body (140) and the cutting material body support (150) that carries the cutting material body, an elastically yielding intermediate layer (160) is arranged that fills the intermediate space between the cutting material body and the cutting material body support. A preferred area of application is the honing of cylinder running surfaces during the production of cylinder blocks or cylinder liners for reciprocating piston machines.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
The invention relates to a honing method for machining the inner surface of a bore in a workpiece with the aid of at least one honing operation, in particular for honing cylinder running surfaces in the production of cylinder blocks, or cylinder liners for reciprocating piston machines, wherein during a honing operation, an expandable honing tool coupled with a spindle is moved back and forth inside the bore for generating a lifting movement in the axial direction of the bore. At the same time, the honing tool is rotated with a torque transmitted via the spindle for generating a rotational movement superimposing the lifting movement. A bore shape that is rotationally symmetrical with respect to a bore axis and that deviates from the circular cylinder shape, and has an axial contour profile is produced. For generating an axially varying material removal, a length of stroke and/or a lifting position of the lifting movement is changed in at least one variable stroke phase (PH2). The honing method is characterized by a control of the torque (DM) transmitted to the honing tool via the spindle such that during the variable stroke phase (PH2), the torque substantially remains constant.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
B24B 33/06 - Honing machines or devicesAccessories therefor with controlling or gauging equipment
B24B 49/16 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
The invention relates to a honing method for machining the inner surface of a bore (110) in a workpiece (100) with the aid of at least one honing operation, wherein during a honing operation, an expandable honing tool coupled with a spindle is moved back and forth inside the bore for generating a lifting movement in the axial direction of the bore, and at the same time, is rotated about a tool axis for generating a rotational movement superimposing the lifting movement. In this way, a bore is generated that is rotationally symmetrical with respect to a bore axis and that deviates from the circular cylinder shape, which bore has a circular cylindrical first bore section (120) and adjacent thereto, has a non- circular cylindrical second bore section (130) having an axially variable diameter. A measuring of the diameter of the first bore section (120) in at least one measuring plane (M1-1, M1-2, M1-3) for determining a first diameter value and a measuring of the diameter of the second bore section (130) in at least one second measuring plane (M2-1, M2-2, M2-3) for determining a second diameter value takes place. An evaluation of the second diameter value takes place using the first diameter value in order to determine actual shape values, which represent an actual shape of the bore. The actual shape values are compared to target shape values in order to determine shape deviation values. A subsequent honing operation is controlled subject to the shape deviation values.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
B24B 49/02 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
B24B 49/08 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving liquid or pneumatic means
A honing tool for machining an inner surface of a bore in a workpiece with the aid of at least one honing operation comprises a tool body (210) which defines a tool axis (212), an expandable annular cutting group (220) having a plurality of cutting material bodies distributed around the circumference of the tool body, the axial length of said cutting material bodies, measured in the axial direction, being less than an effective outside diameter of the cutting group with the cutting material bodies fully retracted, wherein the cutting material bodies are arranged in an end region, remote from the spindle, of the tool body and are infeedable radially with respect to the tool axis by means of a cutting group infeed system assigned to the cutting group; and an expandable guiding group (300) having a plurality of guiding strips (320) distributed around the circumference of the tool body, said guiding strips (320) being arranged on the tool body partially or fully between the annular cutting group (220) and a spindle-side coupling structure of the honing tool and being radially infeedable independently of the cutting material bodies by means of a guiding group infeed system. The honing tool can be used in particular for honing cylinder surfaces in the production of cylinder blocks or cylinder liners for reciprocating piston engines.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
In a honing method for machining the inner face of a bore (122) in a workpiece (120) by means of at least one honing operation, an expandable honing tool is used in a honing operation, said expandable honing tool having an expandable annular cutting group (220) having a plurality of cutting material bodies distributed around the circumference of the tool body in an end region of the tool body that is remote from the spindle, the axial length of said cutting material bodies being less than the effective outside diameter of the cutting group with the cutting material bodies fully retracted. The method is characterized by the following steps of: rigidly coupling the honing tool to a work spindle of a machine tool; positioning the honing tool and the bore relative to one another such that a tool axis (212) of the honing tool is coaxial with a setpoint position (SB) of the bore axis of the bore; introducing the honing tool into the bore, with the cutting material bodies retracted, as far as an insertion end position in which the cutting group is located in an end region (123), remote from the entry, of the length to be machined of the bore; rotating the honing tool and simultaneously expanding the cutting group, at or in the region of the insertion end position, as far as a first radial position of the cutting material bodies such that, by material-removing engagement of cutting material bodies with the inner side of the bore, a cylindrical widening (121) of the bore is produced in the end region of the bore, said cylindrical widening (121) being centred substantially with respect to the setpoint position of the bore axis; withdrawing the honing tool from the bore while simultaneously rotating the honing tool such that the bore is widened, starting from the cylindrical widening, successively in the direction of the entry side.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
In a honing method for machining the internal surface of a bore in a workpiece with the aid of at least one honing operation, during a honing operation an expandable honing tool is moved up and down within the bore in order to produce a reciprocating movement in the axial direction of the bore and at the same time is rotated in order to produce a rotary movement superimposed on the reciprocating movement. In the process, a bottle-shaped bore is produced, said bore having a first bore section with a first diameter after a bore inlet, a second bore section with a second diameter greater than the first diameter away from the bore inlet, and a transition section having a continuous transition from the first diameter to the second between the first and the second bore section. In this case, during at least one honing operation use is made of an annular tool (200) which has at least one annular cutting unit (220) with a plurality of radially adjustable cutting-material bodies that are distributed around the circumference of a tool body and are formed as honing segments that are wide in the circumferential direction and narrow in the axial direction, wherein an axial length, measured in the axial direction, of the honing segments is less than the width measured in the circumferential direction and the axial length of the cutting region equipped with cutting-material bodies is less than the effective outside diameter of the honing tool. The method is particularly suitable for honing cylinder running surfaces in the production of cylinder blocks or cylinder liners for reciprocating piston machines.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
The invention relates to a machining method for machining a curved workpiece surface (210) of a workpiece (200), in which a roll forming operation is carried out. At least one roller element (180A, 180B, 180C) of a machining tool (100) is rolled under a contact pressure against a segment (198) of the curved workpiece to be machined. An outer surface of the roller element comprises a rough surface structure in at least one working segment (190A, 190B, 190C) intended for rolling contact with the workpiece surface. The contact pressure is set so that a rough roll-formed structure is generated when rolling by locally deforming the workpiece material without removing material in the area of the workpiece surface being machined. The machining method can be used, for example, for machining the inner surface of a hole in a workpiece, in particular for roughening the workpiece surface for subsequent coating. The invention further relates to a machining tool and to a workpiece thus produced.
B21H 7/18 - Making articles not provided for in groups , e.g. agricultural tools, dinner forks, knives, spoons grooved pinsRolling grooves, e.g. oil grooves, in articles
In a method for fine processing of an internal surface of a borehole in a work piece, which is composed at least in the region of the borehole substantially of a light metal material, a processing tool performs during at least one processing operation a working motion within the borehole to be processed. The method comprises a friction strengthening operation, wherein a processing tool is used which has at least one friction element, which has at least one contact surface provisioned for friction contact with the internal surface. The friction element is moved over the internal surface at a relative speed with respect to the internal surface and at a friction-inducing pressure so that under the influence of dynamic friction and pressure in the region of the internal surface, a friction strengthened layer is produced which is induced essentially by friction and pressure. The method can be used in particular for processing cylinder running surfaces in the production of light-metal engine blocks.
B24B 33/02 - Honing machines or devicesAccessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
