EP4260979A1 - Dispositif de meulage et procédé d'usinage par meulage d'une pièce à usiner - Google Patents

Dispositif de meulage et procédé d'usinage par meulage d'une pièce à usiner Download PDF

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Publication number
EP4260979A1
EP4260979A1 EP23166553.0A EP23166553A EP4260979A1 EP 4260979 A1 EP4260979 A1 EP 4260979A1 EP 23166553 A EP23166553 A EP 23166553A EP 4260979 A1 EP4260979 A1 EP 4260979A1
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EP
European Patent Office
Prior art keywords
grinding
tool
workpiece
regrinding
tools
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23166553.0A
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German (de)
English (en)
Inventor
Sabri Akdemir
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dvs Universal Grinding GmbH
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Dvs Universal Grinding GmbH
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Filing date
Publication date
Application filed by Dvs Universal Grinding GmbH filed Critical Dvs Universal Grinding GmbH
Publication of EP4260979A1 publication Critical patent/EP4260979A1/fr
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
    • B24B7/17—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/07—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table
    • B24B7/075—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table using a reciprocating grinding head mounted on a movable carriage

Definitions

  • the invention relates to a grinding device for grinding a workpiece, in particular a brake disc, with a workpiece carrier for carrying the workpiece to be ground and with at least one grinding tool for grinding at least one workpiece surface to be ground of the workpiece carried by the workpiece carrier.
  • the invention relates to a method for grinding a workpiece, in particular a brake disc, with a grinding device, in particular of the type mentioned above.
  • Grinding devices are known in different designs, for example in the form of machine tools, and are used for the grinding processing of workpieces of different types. Regardless of the type of workpieces to be ground, grinding devices often have a workpiece carrier, for example in the form of a workpiece spindle, which holds the material to be ground Carries the workpiece during grinding. In addition, grinding devices typically have a grinding tool, for example in the form of a grinding wheel, with which the grinding processing of a workpiece surface to be ground of the workpiece carried by the workpiece carrier is carried out. Some grinding devices also have several grinding tools so that different workpiece surfaces of the workpiece can be grinded at the same time.
  • hard materials are increasingly being used as materials for many workpieces.
  • brake discs increasingly have a hard material coating in the area of their friction surfaces in order to reduce the abrasion that occurs on the brake disc during braking and thus the emitted To reduce the amount of fine dust.
  • the use of hard materials leads to a significant increase in the processing time required for grinding, which ultimately results in increased costs.
  • the present invention is based on the object of designing and developing the grinding device and the method of the type mentioned at the beginning and previously described in more detail in such a way that the grinding processing of workpieces can be carried out more cost-effectively.
  • a grinding device according to the preamble of claim 1 in that at least one regrinding tool is provided for grinding post-processing of the at least one workpiece surface processed by the grinding tool, at least partially simultaneously with the grinding processing of the workpiece surface to be ground by the grinding tool.
  • the grinding device therefore has at least one regrinding tool in addition to the at least one grinding tool.
  • At least that's one Regrinding tool is designed to grind the workpiece surface processed by the grinding tool, at least partially simultaneously with the grinding processing of the workpiece surface to be ground by the grinding tool.
  • rough machining can be carried out using the grinding tool and fine machining, often also referred to as finishing, can be carried out on the workpiece surface using the regrinding tool.
  • This offers the additional advantage that there is no need to change tools between rough machining and fine machining and therefore rough machining and fine machining can be carried out in one clamping.
  • rough machining of the workpiece surface does not necessarily have to be carried out with the grinding tool and fine machining with the regrinding tool, although this may be preferred.
  • it can also be provided that rough machining of the workpiece surface is carried out with both the grinding tool and the regrinding tool, for example in order to achieve a relatively large amount of material removal in a short time.
  • the grinding device which can be designed, for example, as a machine tool, can have a base, for example in the form of a machine bed. Then The base can carry the workpiece carrier, the at least one grinding tool and the at least one regrinding tool. In this way, a precise relative arrangement of the corresponding components to one another can be achieved, which can have a positive effect on the manufacturing tolerances that can be achieved.
  • the workpiece carrier, the at least one grinding tool and the at least one regrinding tool can expediently be mounted on the base, for example directly or indirectly via at least one further component.
  • the base in particular the machine bed, can at least predominantly, in particular at least essentially, be made of granite. Granite has good vibration-damping properties and is particularly temperature-stable, which has a positive effect on consistently high workpiece quality.
  • Granite is preferably understood to mean natural granite, which can consist at least essentially of quartz, feldspars and mafic minerals, in particular mica.
  • the workpiece carrier which can be designed, for example, as a workpiece spindle, is designed to carry the workpiece to be ground, in particular during grinding and/or post-processing. This contributes to simple and precise grinding.
  • the workpiece carrier can expediently have at least one clamping device for clamping the workpiece. This means the workpiece can be easily and temporarily fixed to the workpiece carrier.
  • the at least one grinding tool and/or the at least one regrinding tool can be designed simply and expediently as a, in particular circular, grinding wheel. Regardless of this, the at least one grinding tool and/or the at least one regrinding tool can have a grinding surface for, in particular flat, grinding contact with the workpiece surface. Then the at least one grinding surface can be in grinding contact with the workpiece surface during the grinding processing and/or the grinding post-processing. Alternatively or additionally The at least one grinding surface can be arranged at least essentially in one plane. This can be particularly useful for flat workpiece surfaces in terms of simple and uniform grinding.
  • the workpiece which can be part of the grinding device, can be made at least essentially of a metallic material, in particular cast iron or steel. With such materials, grinding can be particularly complex due to the typically relatively high hardness, so that the time advantages of simultaneous grinding and post-processing are particularly important.
  • the workpiece has a coating, at least in the area of the at least one workpiece surface to be ground, which has a higher hardness than a core of the workpiece carrying the coating. The coating can then expediently be partially removed using the at least one grinding tool and/or the at least one regrinding tool.
  • the coating can be made, for example, from cast iron, steel, aluminum oxide, carbon ceramic, tungsten carbide, silicon carbide, chromium carbide or niobium carbide.
  • Aluminum oxide, carbon ceramic, tungsten carbide, silicon carbide, chromium carbide and niobium carbide enable particularly hard surfaces.
  • the workpiece can be at least essentially rotationally symmetrical.
  • the workpiece can be designed as a brake disc, in particular for a motor vehicle, such as a commercial vehicle and/or a passenger car.
  • a motor vehicle such as a commercial vehicle and/or a passenger car.
  • the at least one workpiece surface to be ground can expediently be a friction surface of the brake disc.
  • the workpiece carrier is rotatably mounted about a workpiece rotation axis.
  • simultaneous grinding can be carried out by the grinding tool and the regrinding tool in a structurally simple manner.
  • the grinding device can have a workpiece rotary drive for rotating the workpiece carrier around the workpiece rotation axis. This is not only useful in terms of the effort required for grinding, but can also contribute to a uniform grinding result.
  • the at least one grinding tool can be rotatably mounted about a tool axis of rotation. This can have a positive effect on the grinding result and even wear on the grinding tool.
  • the at least one regrinding tool is mounted rotatably about a tool rotation axis. It can be advantageous in terms of design if the at least one tool axis of rotation is arranged at least substantially parallel to the workpiece axis of rotation.
  • the grinding device can have at least one tool rotation drive. This helps simplify grinding and can have a positive effect on uniform grinding results. It is fundamentally conceivable that the at least one grinding tool and the at least one regrinding tool are driven by the same tool rotary drive. Structurally and with regard to flexible grinding, however, it may be preferred if a tool rotary drive is assigned to the at least one grinding tool and the at least one regrinding tool.
  • the grinding tool can be movable in a feed direction relative to the workpiece carrier. This can contribute to a simple realization of the simultaneous processing of the workpiece by the grinding tool and the regrinding tool. Against the same background, it can alternatively or additionally be advantageous if the at least one regrinding tool can be moved relative to the workpiece carrier for moving along the workpiece surface in a feed direction.
  • the feed direction of the at least one grinding tool can expediently be arranged at least substantially parallel to a grinding surface of the grinding tool.
  • the feed direction of the at least one regrinding tool can expediently be arranged at least substantially parallel to a grinding surface of the regrinding tool.
  • the at least one feed direction can be arranged transversely, in particular at least substantially perpendicularly, to the workpiece rotation axis. This can be useful in terms of simple grinding for workpiece surfaces that are arranged at an angle to the workpiece axis of rotation, such as the friction surfaces of brake discs.
  • the feed direction of the at least one regrinding tool can be arranged at least substantially parallel to the feed direction of the at least one grinding tool.
  • This can in terms of an evenly distributed force input into the workpiece and therefore a high workpiece quality. Regardless of this, with a plurality of grinding tools and/or regrinding tools, it can be structurally simple if the grinding tools and/or regrinding tools are movable in the same feed direction.
  • the grinding device can have at least one feed drive. This not only simplifies grinding, but can also contribute to an even grinding result.
  • the at least one grinding tool and the at least one regrinding tool can be driven simply and cost-effectively by the same feed drive.
  • the grinding device can have a, preferably electronic, control device.
  • the control device can then be set up to move the at least one grinding tool and the at least one regrinding tool in relation to the respective distance from a workpiece carrier axis of the workpiece carrier at an offset to one another in the respective feed direction.
  • the control device can therefore be set up to move the at least one grinding tool and the at least one regrinding tool in the respective feed direction in such a way that the grinding tool and the regrinding tool are in relation to the respective distance in the feed direction to the workpiece carrier axis are arranged at an offset from one another.
  • the control device can expediently be set up to control the at least one feed drive in such a way that the at least one grinding tool and the at least one regrinding tool are moved accordingly.
  • the offset can in particular mean a difference between the distance of the at least one grinding tool in the feed direction to the workpiece carrier axis and the distance of the at least one regrinding tool in the feed direction to the workpiece carrier axis.
  • the workpiece carrier axis can expediently be the workpiece rotation axis.
  • the offset is at least essentially constant. Then the offset between the at least one grinding tool and the at least one regrinding tool can remain at least essentially unchanged while the grinding tool and the regrinding tool are moved in the respective feed direction. Regardless of whether the offset is constant or not, it may be advisable if the offset is smaller than the extension of the grinding tool, in particular a grinding surface of the grinding tool, in the feed direction. In this way, the size of the contact surface between the grinding tool and the workpiece and thus the forces acting on the grinding tool during grinding can be reduced. against this background, it may also be advisable if the offset is at most 0.5 times the extent of the grinding tool, in particular the grinding surface of the grinding tool, in the feed direction. A particularly low force on the grinding tool can be achieved if the offset is at most 0.25 times, preferably at most 0.1 times, the extension of the Grinding tool, in particular the grinding surface of the grinding tool, in the feed direction.
  • the offset can be at least 1 mm and/or at most 30 mm. On the one hand, it can be ensured that sufficient material removal is achieved with the grinding tool until the regrinding tool comes into grinding contact with the respective section of the workpiece surface, and on the other hand, short processing times can be ensured. Against this background, it can be particularly preferred if the offset is at least 2 mm, in particular at least 3 mm, and/or at most 20 mm, in particular at most 15 mm.
  • the at least one grinding tool can be adjustable in an adjustment direction relative to the workpiece carrier. This means the material removal can be easily adjusted.
  • the at least one regrinding tool is adjustable in an adjustment direction relative to the workpiece carrier in order to adjust the material removal to be effected with the regrinding tool.
  • a flexible adjustment of the material removal is made possible if the at least one grinding tool and/or the at least one regrinding tool is adjustable in a pair of opposing adjustment directions.
  • the at least one grinding tool and the at least one regrinding tool are independently adjustable in the respective setting direction.
  • the at least one adjustment direction can expediently be arranged at least substantially perpendicular to the feed direction of the at least one grinding tool and/or the at least one regrinding tool.
  • the grinding device can have at least one actuator. This means that material removal can be adjusted particularly easily and precisely.
  • the at least one grinding tool and the at least one regrinding tool can basically be driven by the same actuator. With regard to flexible adjustment of the tools independently of one another, however, it may be advisable if at least two actuators are provided, with the at least one grinding tool and the at least one regrinding tool each being assigned their own actuator.
  • the grinding device can have two grinding tools.
  • the grinding tools can then be set up to grind two workpiece surfaces of the workpiece to be ground at least partially, in particular at least essentially, simultaneously. This means cycle times can be further reduced for workpieces with multiple workpiece surfaces to be ground.
  • simultaneous grinding of the workpiece with two grinding tools can be advantageous in terms of the forces acting on the workpiece during grinding and thus the quality of the workpiece. For this reason, it can also be advantageous if the grinding tools are designed to grind workpiece surfaces that are at least essentially parallel and/or facing away from one another. Alternatively or additionally, for the reasons mentioned above, it may also be advisable if the grinding device has two regrinding tools.
  • the regrinding tools can then be set up to at least partially, in particular at least substantially, simultaneously re-process the workpiece surfaces that have been ground by the grinding tools.
  • the grinding tools in particular grinding surfaces of the different grinding tools, can have a grinding gap limit on opposite sides.
  • the workpiece can then be accommodated in sections in the grinding gap during grinding. This can also have an additional impact on the forces acting on the workpiece during grinding and have a positive effect on the workpiece quality.
  • the regrinding tools in particular grinding surfaces of the various regrinding tools, limit a grinding gap on opposite sides, so that the workpiece can be accommodated in sections in the grinding gap during the grinding post-processing.
  • the at least one grinding tool and the at least one regrinding tool can be designed in such a way that at least essentially the same surface quality can be achieved on the workpiece with the grinding tool and the regrinding tool. This can be useful, for example, if a large amount of material needs to be removed in a short period of time.
  • the at least one grinding tool is designed for rough machining of the workpiece surface and the at least one regrinding tool is designed for fine machining of the workpiece surface. This means that rough machining and fine machining of the workpiece surface can be carried out in one clamping operation. This not only enables particularly short processing times, but also prevents inaccuracies in processing that can result from re-clamping the workpiece and/or the tool.
  • the at least one grinding tool and the at least one regrinding tool can be designed at least essentially the same way. However, it can be particularly advantageous not only with regard to rough machining and subsequent fine machining if the at least one grinding tool and the at least one regrinding tool differ from one another with regard to the maximum grain size of the abrasive particles, the material of the abrasive particles and/or the material of the bond. This means that the grinding tool and the regrinding tool can be used for different grinding tasks be adjusted, which can have a positive effect on cycle times.
  • the choice of the maximum grain size, the abrasive particle material and the bonding material depends in particular on the material to be processed, the required material removal and the required surface quality.
  • the maximum grain size of the abrasive particles of the regrinding tool is smaller than the maximum grain size of the abrasive particles of the grinding tool.
  • the ratio of the maximum grain size of the abrasive particles of the regrinding tool to the maximum grain size of the abrasive particles of the grinding tool can expediently be between 0.1 and 0.7, preferably between 0.2 and 0.55, in particular between 0.3 and 0.45.
  • the material for the abrasive particles of the at least one grinding tool and / or the at least one regrinding tool can be, for example, natural or synthetic diamond or cubic boron nitride. These materials have a particularly high hardness.
  • the bond of the at least one grinding tool and/or the at least one regrinding tool can expediently be a metallic or ceramic bond.
  • the abrasive particles mean in particular the particles that cause the material to be removed from the workpiece.
  • the bond serves in particular to hold the abrasive particles.
  • the abrasive particles are preferably embedded in the bond at least in sections. Regardless of this, the abrasive particles of the at least one grinding tool and/or the abrasive particles of the at least one regrinding tool can expediently form a grinding surface of the grinding tool or the regrinding tool.
  • the at least one grinding tool and the at least one regrinding tool are arranged on opposite sides of the workpiece carrier, in particular on opposite sides of the workpiece rotation axis. Then the at least one grinding tool can be arranged on one side of the workpiece carrier and the at least one regrinding tool can be arranged on an opposite side of the workpiece carrier.
  • the workpiece is rotated, in particular continuously, about a workpiece rotation axis during the grinding processing and/or during the grinding post-processing.
  • the workpiece is therefore preferably rotated while the at least one grinding tool and/or the at least one regrinding tool is in grinding contact with the workpiece surface.
  • the at least one grinding tool can be rotated, in particular continuously, about a tool rotation axis during the grinding processing and/or the at least one regrinding tool during the grinding post-processing. Then the at least one grinding tool and/or the at least one regrinding tool can be rotated about the, in particular respective, tool axis of rotation, while the grinding tool and/or the regrinding tool is in grinding contact with the workpiece surface. This can contribute to a high quality of the grinding result and even wear of the grinding tool and/or the regrinding tool. Regardless, it can be constructively advantageous if the at least one tool axis of rotation is arranged at least substantially perpendicular to the workpiece surface.
  • the at least one grinding tool can be moved during the grinding processing and/or the at least one regrinding tool during the grinding post-processing, in particular continuously, in a feed direction along the workpiece surface. Then the at least one grinding tool and/or the at least one regrinding tool can be moved in the, in particular respective, feed direction while the grinding tool and/or the regrinding tool is in grinding contact with the workpiece surface. This can contribute to a simple realization of the simultaneous processing of the at least one workpiece surface by the grinding tool and the regrinding tool.
  • the at least one grinding tool and/or the at least one regrinding tool can be moved from a starting position assigned to one end of the workpiece surface in the feed direction to an end position assigned to another end of the workpiece surface. In this way, the entire workpiece surface can be successively grinded and/or reworked. Regardless of this, the at least one grinding tool and the at least one regrinding tool can expediently be moved at least partially simultaneously in the respective feed direction.
  • the at least one feed direction can expediently be arranged at least substantially parallel to the workpiece surface. Regardless of this, the feed direction of the at least one grinding tool can be arranged opposite to the feed direction of the at least one regrinding tool. This can have a positive effect on the forces acting on the workpiece during grinding and therefore on the workpiece quality and the service life of the workpiece carrier. Alternatively or additionally, at least one can For the sake of simplicity, the feed direction points in the direction of the workpiece rotation axis.
  • the at least one grinding tool and the at least one regrinding tool are at an, in particular at least essentially constant, offset from one another in relation to the respective distance from a workpiece carrier axis of the workpiece carrier, in particular the workpiece rotation axis respective feed direction can be moved. Then the at least one grinding tool and the at least one regrinding tool can be moved in the respective feed direction in such a way that the grinding tool and the regrinding tool are arranged at an offset from one another in relation to the respective distance in the feed direction to the workpiece carrier axis. In this way, the at least one workpiece surface can be successively machined in a simple manner, first with the grinding tool and then re-machined with the regrinding tool, which can be particularly advantageous for rough machining and fine machining.
  • a projection of the at least one grinding tool that is in grinding contact with the workpiece surface is arranged perpendicularly onto the workpiece surface at least in sections in a section of the workpiece surface that has been reworked with the regrinding tool . Then the projection of the grinding tool can be arranged in sections in the section that has been reworked with the regrinding tool, while the at least one workpiece surface is both machined with the grinding tool and refinished with the regrinding tool.
  • a particularly significant reduction in the forces acting on the grinding tool can be achieved if the projection of the grinding tool is at least over a predominant, in particular at least over a substantial, part of the width of the with Regrinding tool extends grinding reworked section of the workpiece surface.
  • the width can in particular mean the extent of the relevant section in the feed direction of the grinding tool.
  • the at least one regrinding tool that is in grinding contact with the workpiece surface projects in the direction of the workpiece surface compared to the grinding tool that is in grinding contact with the workpiece surface. This not only enables effective grinding of the workpiece surface with the regrinding tool, but can also contribute to a reduction in the forces acting on the grinding tool during grinding. Then the at least one regrinding tool can protrude relative to the grinding tool in the direction of the workpiece surface, while the workpiece surface is both processed by grinding with the grinding tool train and refinished by grinding with the regrinding tool.
  • the at least one regrinding tool protrudes by 5 ⁇ m to 100 ⁇ m, preferably 10 ⁇ m to 70 ⁇ m, in particular 15 ⁇ m to 50 ⁇ m, relative to the grinding tool.
  • a material removal to be effected with the at least one grinding tool and/or the at least one regrinding tool is adjusted. This can be done in a simple manner by adjusting the at least one grinding tool and/or the at least one regrinding tool in an adjustment direction, in particular relative to the workpiece carrier. A precise adjustment of the material removal can easily be made possible if the at least one adjustment direction is arranged at least substantially perpendicular to the workpiece surface.
  • the material removal of the at least one grinding tool and/or the at least one regrinding tool can expediently be adjusted before the grinding process begins Grinding tool and/or grinding post-processing with the regrinding tool.
  • the position of the at least one grinding tool during the grinding processing and/or of the at least one regrinding tool during the grinding post-processing can be at least essentially constant in the, in particular respective, setting direction.
  • constant material removal across the workpiece surface can be achieved in a simple manner.
  • material removal is preferably understood to mean the thickness of the layer removed from the workpiece surface during grinding or grinding post-processing.
  • a grinding device 1 is shown in a schematic top view and a schematic side view.
  • the grinding device 1 has a workpiece carrier 2 in the form of a workpiece spindle.
  • the workpiece carrier 2 carries a workpiece 3 in the form of a brake disc, for example for a commercial vehicle.
  • the workpiece 3 has two workpiece surfaces 4 to be ground, which in the illustrated and preferred exemplary embodiment are the friction surfaces of the brake disc.
  • the grinding device 1 in the present case has two grinding tools 5 and two regrinding tools 6, each of which is assigned to one of the workpiece surfaces 4.
  • the grinding tools 5 and the regrinding tools 6 are arranged on opposite sides of the workpiece carrier 2.
  • the workpiece carrier 2 is rotatably mounted about a workpiece rotation axis DWS, which in the present case corresponds to the longitudinal axis AL of the workpiece carrier 2.
  • the workpiece carrier 2 can thus be rotated together with the workpiece 3 about the workpiece rotation axis DWS.
  • the grinding device 1 For rotating the workpiece carrier 2 about the workpiece rotation axis DWS, the grinding device 1 has a workpiece rotary drive, not shown, which can be designed, for example, as an electric or hydraulic drive.
  • the grinding tools 5 and the regrinding tools 6 are also rotatably mounted.
  • the grinding tools 5 as well as the regrinding tools 6 can be rotated about a common tool axis of rotation DWZ stored.
  • the grinding device 1 has four tool rotary drives (not shown), for example electrical or hydraulic, with each of the grinding tools 5 and the regrinding tools 6 being assigned one of the tool rotary drives.
  • the grinding tools 5 are arranged in such a way that the grinding surfaces 7 of the grinding tools 5 delimit a grinding gap 9 on opposite sides.
  • the grinding surfaces 8 of the regrinding tools 6 delimit a grinding gap 10 on opposite sides.
  • the grinding tools 5 and the regrinding tools 6 differ in the illustrated and therefore preferred exemplary embodiment with regard to their grinding particles forming the grinding surfaces 7, 8.
  • the abrasive particles of the regrinding tools 6 are finer than the abrasive particles of the grinding tools 5.
  • the abrasive particles of the grinding tools 5 have a maximum grain size of approximately 400 ⁇ m.
  • the abrasive particles of the regrinding tools 6 have a maximum grain size of approximately 150 ⁇ m.
  • the abrasive particles of the grinding tools 5 are metallic and the abrasive particles of the regrinding tools 6 are ceramic-bonded.
  • the grinding tools 5 and the regrinding tools 6 are shown in starting positions before the start of the grinding processing and the grinding post-processing.
  • the grinding tools 5 and the regrinding tools 6 can each be in a pair of opposing adjustment directions RE can be adjusted continuously.
  • the setting directions RE are each arranged parallel to the tool rotation axis DWZ and perpendicular to the grinding surface 7, 8 of the respective grinding tool 5 or regrinding tool 6.
  • the grinding devices 5 and the regrinding tools 6 are each moved towards the workpiece rotation axis DWS in a feed direction RV perpendicular to the respective adjustment direction RE.
  • the grinding device 1 has two feed drives, not shown, designed as linear drives, one feed drive being assigned to the grinding tools 5 and the other feed drive being assigned to the regrinding tools 6.
  • the feed drives can each move a slide on which the grinding tools 5 or the regrinding tools 6 are mounted.
  • the feed drives are controlled by an electronic control device (not shown) in such a way that the grinding tools 5 and the regrinding tools 6 are continuously moved in the respective feed direction RV.
  • the grinding tools 5 and the regrinding tools 6 are driven to rotate about the respective tool rotation axis DWZ and the workpiece carrier 2 together with the workpiece 3 about the workpiece rotation axis DWS, which can also be controlled by the control device, not shown.
  • the grinding device 1 is shown in a schematic top view and a schematic side view.
  • the grinding tools 5 are shown in positions shortly after the grinding tools 5 come into grinding contact with the assigned workpiece surface 4, and the regrinding tools 6 are shown in positions immediately before the regrinding tools 6 come into grinding contact with the assigned workpiece surface 4.
  • the workpiece surfaces 4 each have a still unground and therefore to be ground section 11, which is arranged radially on the inside, and a section 12 which has already been ground by the respective grinding tool 5 and which is arranged radially on the outside.
  • the grinding tools 5 and the regrinding tools 6 are moved by the control device (not shown) in the respective feed direction RV in such a way that the grinding tools 5 and the regrinding tools 6 are arranged at an offset V to one another based on the respective distance to the workpiece rotation axis DWS.
  • the offset V is set so that the distance between the grinding tools 5 and the workpiece rotation axis DWS is smaller than the distance between the regrinding tools 6 and the workpiece rotation axis DWS.
  • the offset V is significantly smaller than the extension of the grinding tools 5 in the feed direction RV and is approximately 0.5 cm to 1 cm. With the at least essentially constant offset V relative to one another, the grinding tools 5 and the regrinding tools 6 are moved continuously in the respective feed direction RV.
  • the grinding device 1 is shown in a schematic top view and a schematic side view.
  • the grinding tools 5 and the regrinding tools 6 are each in a position opposite the position according to Fig. 2A-B shown in the position moved further in the respective feed direction RV.
  • Both the grinding tools 5 and the regrinding tools 6 are in grinding contact with the respective workpiece surface 4. Accordingly, the workpiece surfaces 4 each have a section 13 which is reworked by the respective regrinding tool 6 and which is arranged radially on the outside.
  • the width of the sections 11 of the workpiece surfaces 4 to be ground is reduced and the sections 12 of the workpiece surfaces 4 that have been ground by the respective grinding tool 5 but have not yet been reworked by the respective regrinding tool 6 have migrated radially inwards.
  • the projections of the grinding surfaces 7 of the grinding tools 5 extend in a direction perpendicular to the assigned workpiece surface 4 over the entire width B of the respective section 13 of the workpiece surface 4 that has been reworked by the regrinding tool 6.
  • the grinding device 1 is shown in a schematic top view and a schematic side view.
  • the grinding tools 5 are each shown in a position upon reaching the radially inner end of the respective workpiece surface 4 and the regrinding tools 6 are each shown in a position shortly before reaching the radially inner end of the respective workpiece surface 4. Accordingly, the sections 12 of the workpiece surfaces 4 that have been ground by the respective grinding tool 5 but have not yet been reworked by the respective regrinding tool 6 have migrated to the radially inner end of the respective workpiece surface 4.
  • the width B of the sections 13 of the workpiece surface 4 reworked by the respective regrinding tool 6 is correspondingly increased.
  • the workpiece surfaces 4 are completely ground by the respective grinding tool 5.
  • the regrinding tools 6 are moved further in the feed direction RV until they reach the radially inner end of the respective workpiece surface 4, in order to complete the grinding finishing of the workpiece surfaces 4. Then the grinding tools 5 and the regrinding tools 6 are each moved away from the associated workpiece surface 4 in a direction perpendicular to the respective feed direction RV and then back into the starting position according to Fig. 1A-B emotional. The finished ground workpiece 3 can then be removed from the workpiece carrier 2 and another workpiece 3 to be ground can be arranged on the workpiece carrier 2, whereupon the grinding process can begin again.
  • Fig. 5 is a detail of the grinding device 1 in the area of the workpiece carrier 2 in a sectional view along the in the Fig. 4A shown sectional plane VV.
  • the grinding tools 5 and the regrinding tools 6 are in the position according to Fig. 4A-B shown.
  • the brake pot 14 of the workpiece 3 designed as a brake disc rests on a support element 15 of the workpiece carrier 2.
  • a centering mandrel 17 extends through the hub bore 16 of the brake disc of the workpiece carrier 2, over which the brake disc is clamped in the axial direction by means of a flange cover 18 and a bayonet lock 19 of the workpiece carrier 2.
  • Fig. 6 is a detail of the grinding device 1 in the area of the grinding tools 5 and the regrinding tools 6 in a sectional view along the in the Fig. 3A shown section plane VI-VI.
  • the grinding tools 5 and the regrinding tools 6 are in the position according to Figs. 3A-B and, like the workpiece 3, shown partially cut.
  • the workpiece 3 has a coating 20 which is applied to a core 21 of the workpiece 3 and whose thickness is shown significantly enlarged here.
  • the coating 20 is designed as a hard material coating, for example made of aluminum oxide, carbon ceramic, tungsten carbide, silicon carbide, chromium carbide or niobium carbide, the hardness of which is higher than the hardness of the core 21 of the workpiece 3.
  • the grinding tools 5 and the regrinding tools 6 each remove part of the coating 20.
  • the material removal MS caused by the grinding tools 5 is approximately 70 ⁇ m and the material removal MN caused by the regrinding tools 6 is approximately 30 ⁇ m, so that the total material removal in the present case is approximately 100 ⁇ m.
  • the material removal MS,MN is shown significantly enlarged for the sake of clarity.
EP23166553.0A 2022-04-11 2023-04-04 Dispositif de meulage et procédé d'usinage par meulage d'une pièce à usiner Pending EP4260979A1 (fr)

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DE102022108706.9A DE102022108706A1 (de) 2022-04-11 2022-04-11 Schleifvorrichtung und verfahren zur schleifenden bearbeitung eines werkstuecks

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473269A (en) * 1967-05-05 1969-10-21 La Salle Machine Tool Grinding apparatus
JP2011156606A (ja) * 2010-01-29 2011-08-18 Aisin Takaoka Ltd ブレーキディスクロータの研削装置および研削方法
CN103551947A (zh) * 2013-11-12 2014-02-05 嵊州市创宇机械科技有限公司 一种立式数控磨簧机
CN105397604A (zh) * 2015-10-26 2016-03-16 霍凤伟 密封环磨床
CN111002130A (zh) * 2019-12-30 2020-04-14 南京平双塑机齿轮制造有限公司 一种双螺杆挤出机专用齿轮的高精度加工工艺及其磨床

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5012618A (en) 1989-12-21 1991-05-07 Hmt Technology Corporation Magnetic disc surface treatment and apparatus
US5484327A (en) 1993-06-21 1996-01-16 Eaton Corporation Method and apparatus for simultaneously grinding a workpiece with first and second grinding wheels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473269A (en) * 1967-05-05 1969-10-21 La Salle Machine Tool Grinding apparatus
JP2011156606A (ja) * 2010-01-29 2011-08-18 Aisin Takaoka Ltd ブレーキディスクロータの研削装置および研削方法
CN103551947A (zh) * 2013-11-12 2014-02-05 嵊州市创宇机械科技有限公司 一种立式数控磨簧机
CN105397604A (zh) * 2015-10-26 2016-03-16 霍凤伟 密封环磨床
CN111002130A (zh) * 2019-12-30 2020-04-14 南京平双塑机齿轮制造有限公司 一种双螺杆挤出机专用齿轮的高精度加工工艺及其磨床

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