EP4147821A1 - Procédé et dispositif d'usinage d'une surface de pièce revêtue de matière dure d'une pièce symétrique en rotation - Google Patents

Procédé et dispositif d'usinage d'une surface de pièce revêtue de matière dure d'une pièce symétrique en rotation Download PDF

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Publication number
EP4147821A1
EP4147821A1 EP21196493.7A EP21196493A EP4147821A1 EP 4147821 A1 EP4147821 A1 EP 4147821A1 EP 21196493 A EP21196493 A EP 21196493A EP 4147821 A1 EP4147821 A1 EP 4147821A1
Authority
EP
European Patent Office
Prior art keywords
rotation
workpiece
grinding wheel
axis
machining
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
EP21196493.7A
Other languages
German (de)
English (en)
Inventor
Sebastian Goeke
Sebastian SCHUMANN
Martin Lupp
Thomas Schmitz
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.)
Thielenhaus Technologies GmbH
Original Assignee
Thielenhaus Technologies GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thielenhaus Technologies GmbH filed Critical Thielenhaus Technologies GmbH
Priority to EP21196493.7A priority Critical patent/EP4147821A1/fr
Priority to CN202211094173.5A priority patent/CN115805501A/zh
Priority to US17/944,126 priority patent/US20230083679A1/en
Publication of EP4147821A1 publication Critical patent/EP4147821A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/01—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor for combined grinding of surfaces of revolution and of adjacent plane surfaces on work
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/04—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels

Definitions

  • the present invention relates to a method and a device for machining a hard-material-coated, in particular planar workpiece surface of a rotationally symmetrical, in particular disk-shaped workpiece using at least one grinding wheel.
  • the invention relates in particular to the processing of a brake disc coated with hard material.
  • Methods and devices are known for machining conventional brake disks, in which the brake disk is driven to rotate about a workpiece axis of rotation and the grinding wheel is driven to rotate about the grinding wheel axis of rotation, with the workpiece axis of rotation and the grinding wheel axis of rotation being aligned parallel to one another, so that the machining workpiece surface of the brake disc and the machining surface of the grinding wheel are aligned parallel to each other.
  • the grinding wheel and the brake disk are in contact with one another over a large area.
  • the basic idea of the invention is that the grinding wheel is positioned towards the workpiece during machining (i.e. while the grinding wheel is in contact with the workpiece and both are driven in rotation (the grinding wheel axis of rotation and the axis of rotation of the workpiece are not parallel).
  • the workpiece surface is therefore also not parallel to the flat machining surface of the grinding wheel.Such an adjustment has the consequence that the grinding wheel with a smaller surface (preferably quasi-linear or even only quasi-punctiform) with the workpiece surface during the processing is in contact.
  • the pressure between the workpiece surface and the grinding wheel can be increased with the same application of force, which means that better removal of the hard material-coated workpiece surface is achieved.
  • the grinding wheel can only be used on a pu nkt or line-shaped point in contact with the workpiece surface to be machined, while the shape of the contact point can change as machining progresses due to wear of the grinding wheel.
  • the device for one (or each) workpiece drive device has a second grinding wheel drive device for generating a rotational movement about a second axis of rotation of the grinding wheel, which is arranged in particular in such a way that a second, in particular planar, workpiece surface of the rotationally symmetrical workpiece, which is opposite the first workpiece surface, is machined by means of a second grinding wheel rotating about the second axis of rotation of the grinding wheel can.
  • the direction of rotation of the two grinding wheels is preferably in opposite directions.
  • a second adjustment device for adjusting the second grinding wheel axis of rotation to the workpiece axis of rotation is provided for the second grinding wheel drive device, so that the second axis of rotation of the grinding wheel and the axis of rotation of the workpiece are not parallel during the machining of the second workpiece surface.
  • the second workpiece surface can be machined simultaneously with the first workpiece surface, with high stock removal on the second workpiece surface also being possible due to the adjustment of the second grinding wheel to the workpiece axis of rotation.
  • the second grinding wheel drive device is operated synchronously (in the opposite direction) to the first grinding wheel drive device.
  • the amount of the (first) angle of attack between the (first) grinding wheel axis of rotation and the axis of rotation of the workpiece is therefore equal to the amount of the (second) angle of attack between the second axis of rotation of the grinding wheel and the axis of rotation of the workpiece during machining.
  • both sides of a brake disc can be processed simultaneously and in the same way.
  • the device is preferably set up in such a way that the two grinding wheel drive devices can be pivoted independently of one another but in opposite directions relative to a machine frame during machining.
  • exactly one adjustment device can be sufficient, with which either the grinding wheel drive device is adjusted to the workpiece drive device or with which the workpiece drive device is adjusted to the grinding wheel drive device.
  • the adjustment of a grinding wheel to the workpiece can take place in particular by means of a pivoting movement by exactly one rotational degree of freedom.
  • the corresponding adjustment device has exactly one rotational degree of freedom.
  • the adjustment allows a pivoting movement by two or more rotational degrees of freedom. Accordingly, the or each adjustment device has two rotational degrees of freedom or the workpiece rotation axis(s) or the grinding wheel rotation axis can be pivoted by two rotational degrees of freedom.
  • the at least one adjustment device can include, for example, one or more (pivoting) axis(es), spherical surface(s), spherical surface(s) or flexure joints for realizing the one degree of freedom or the multiple degrees of freedom.
  • the adjusting device preferably comprises a sleeve-shaped outer body in which the workpiece drive device is pivotably mounted by one or more rotational degrees of freedom.
  • the sleeve-shaped outer body can preferably be linearly advanced in exactly one direction or in all three spatial directions. If the adjusting device can only be linearly advanced in one spatial direction, the workpiece drive device can preferably be linearly advanced in one or more (two or three) spatial directions.
  • an adjustment drive for each rotational degree of freedom can be attached to the sleeve-shaped outer body.
  • At least one infeed device To bring the at least one grinding wheel into contact with the workpiece surface, at least one infeed device must be provided, with which the workpiece (or its workpiece drive device) and the grinding wheel (or its grinding wheel drive device) can be infed relative to one another. In principle, it would be sufficient if only one infeed device (for the workpiece drive device or the grinding wheel drive device) is provided, with which a relative movement can be carried out parallel and/or orthogonally to the workpiece axis of rotation.
  • At least one infeed device is provided, with which the workpiece (or the workpiece drive device) can be moved in a plane orthogonal to the workpiece axis of rotation (in particular radially to the workpiece axis of rotation) to the preferably in particular assigned to a respective adjusting device Grinding wheel drive devices can be moved.
  • each grinding wheel drive device is assigned an infeed device with which the grinding wheel drive device can be moved in a plane orthogonal to the axis of rotation of the workpiece and/or axially.
  • at least one infeed device is set up in such a way that the grinding wheel(s) and the workpiece can be moved relative to one another during machining in a plane at right angles to the axis of rotation of the workpiece.
  • the rotating grinding wheel or grinding wheels is moved relative to the rotating workpiece (specifically, linearly in a radial direction toward or away from the workpiece axis of rotation) in a path disposed in the plane perpendicular to the axis of rotation of the workpiece. In this way, the entire workpiece surface to be machined on one side of the workpiece can be machined by means of the grinding wheel and, if necessary, a desired cross-cut can be produced.
  • the grinding wheel(s) are placed on the workpiece, which is preferably designed as a brake disk, while the grinding wheels are not (yet) in contact with the workpiece surface.
  • a relative movement then takes place in a plane orthogonal to the axis of rotation of the workpiece, so that the grinding wheels touch the workpiece surfaces of the brake disk from the radial outside machine radially inwards (and subsequently in the opposite direction, if necessary). In this way, a high removal rate can be achieved.
  • the (first) setting angle between the (first) grinding wheel axis of rotation and the workpiece axis of rotation and possibly also the (second) setting angle between the second grinding wheel axis of rotation and the workpiece axis of rotation is changed during machining.
  • the lead angle is changed while the workpiece face is in contact with the grinding wheel. Since the effective machining area between the grinding wheel and the workpiece surface increases with increasing wear of the grinding wheel when the grinding wheel is engaged, the effective machining area can be reduced by changing the angle of attack, which in turn increases the pressure between the grinding wheel and the workpiece surface. The removal rate can thus be changed, adjusted or corrected during processing.
  • the device comprises at least one conditioning device, which can be brought from an initial position into a conditioning position, so that the grinding wheel can be conditioned during machining.
  • the grinding wheel is thus conditioned while the grinding wheel itself is in contact with the workpiece.
  • the conditioning during processing at one point with the rotating Grinding wheel are brought into contact, which is opposite the machining point of the grinding wheel with the workpiece.
  • the conditioning device which is mounted pivotably and preferably movably in the axial direction of the workpiece axis of rotation, can be brought by means of a suitable drive from the initial position into the position referred to as the conditioning position, in which the grinding wheel is also in contact with the conditioning device.
  • the workpiece surface is machined with the grinding wheel(s) set in position, while in a subsequent machining step the axis of rotation of the workpiece and the axis of rotation of the grinding wheel are aligned parallel to one another, so that the grinding wheel(s) with a relatively large area on the (respective) workpiece surface.
  • a relatively large amount of material is removed from the hard-material-coated workpiece surface, while in the subsequent processing step a higher surface quality (e.g. dimensional accuracy and/or required roughness) can be achieved.
  • the at least one grinding wheel and the workpiece can be advanced onto one another, in particular parallel to the axis of rotation of the workpiece.
  • the device includes a control device that is set up to carry out the described method.
  • the device shown for machining a hard-material-coated workpiece 1 designed as a brake disk comprises a workpiece drive device 3, with which the brake disk 1 can be driven to rotate about a workpiece axis of rotation 1.1.
  • the device also includes an infeed device 5, with which the brake disk 1 and the workpiece drive device 3 can be moved in the horizontal direction and in the vertical direction.
  • the device also includes a first grinding wheel drive device 4a mounted in a first adjusting device 6a, with which a first grinding wheel 2a can be driven to rotate about a grinding wheel axis of rotation 2a.1.
  • the device also includes a second grinding wheel drive device 4b, mounted in a second adjusting device 6b, with which a second grinding wheel 2b is driven to rotate about a second grinding wheel axis of rotation 2b.1 can be.
  • the adjusting devices 6a, 6b are related to the Figures 2 to 4 explained in more detail.
  • the device also includes a first conditioning device 7a, which can be brought from an initial position into a conditioning position and with which the grinding wheels 2a, 2b can be dressed.
  • the device also includes a second conditioning device 7b, which can also be brought from a starting position into a conditioning position and with which the grinding wheels 2a, 2b can be sharpened.
  • the first adjusting device 6a and a first grinding wheel drive device 4a mounted therein are now described with reference to FIGS Figures 2 to 4 explained in more detail, it being pointed out that the second grinding wheel drive device 4b and the second adjusting device 6b have the same structure.
  • the first adjusting device 6a comprises an inner bearing sleeve 6a.3, in which the drive device 4a for generating a rotational movement of the first grinding wheel 2a is arranged.
  • the inner bearing sleeve 6a.3 is mounted pivotably about a first pivot axis 6a.1 in a second bearing sleeve 6a.4, while the second bearing sleeve 6a.4 is mounted pivotably about a second pivot axis 6a.2 in an outer sleeve 6a.5.
  • the first grinding wheel drive device 4a and thus also the first grinding wheel axis of rotation 2a.1 can thus be pivoted by two rotational degrees of freedom.
  • a first adjusting drive 6a. 1i is provided, with which the inner bearing sleeve 6a.3 can be pivoted about the first pivot axis 6a.1.
  • a second adjusting drive 6a.2i is provided, with which the second bearing sleeve can be pivoted about the second pivot axis 6a.2.
  • the invention can preferably also be realized with only one pivot axis and in particular with an associated adjusting drive.
  • the first screwdown device 6a and the second screwdown device 6b can be advanced at least in the horizontal direction by drives that are not shown.
  • both the brake disc 1 and the grinding discs 2a, 2b are driven in rotation, with the grinding discs 2a, 2b each being brought into contact with one side of the brake disc 1.
  • the grinding wheels 2a, 2b are set in opposite directions in such a way that the first grinding wheel axis of rotation 2a.1 and the second grinding wheel axis of rotation 2b. 1 are not aligned parallel to the workpiece axis of rotation 1.1.
  • Such a non-parallel positioning of the grinding wheels 2a, 2b can take place by means of the positioning devices 6a, 6b.
  • FIG 6 a particularly preferred process sequence is shown, to which the invention is not limited.
  • the grinding wheels 2a, 2b are first aligned with the adjusting devices 6a, 6b in such a way that the first grinding wheel axis of rotation 2a.1 and the second grinding wheel axis of rotation 2b.1 are not parallel to the workpiece axis of rotation 1.1 (see upper image in figure 6 ).
  • the brake disk 1 and the grinding disks 2a, 2b are fed to one another in the horizontal direction in such a way that the brake disk is at the level between the two grinding disks 2a, 2b.
  • the contact area between the respective grinding wheel 2a, 2b and the associated workpiece surface (compared to a parallel adjustment) is reduced, so that with the same external force there is a higher pressure between the grinding wheel 2a, 2b and the brake disc 1 is present in the contact zone.
  • the brake disk 1 can thus be machined with a high removal rate with reduced process forces.
  • a piercing movement can take place along the arrows 8b, in which the grinding wheels 2a, 2b are moved parallel to the workpiece axis of rotation 1.1 towards the brake disc 1.
  • the grinding disk rotation axes 2a.1, 2b.1 are first pivoted (indicated by the arrows 8c) (see middle image in figure 6 ) aligned parallel to the workpiece axis 1.1.
  • a classic flat machining of the brake disc 1 takes place, in which the workpiece surface of the brake disc 1 to be machined and the end faces of the grinding wheels 2a, 2b used for machining are aligned parallel to one another. To correct a process force change caused by the removal the brake disks 2a, 2b are moved towards the brake disk 1 during this last processing step along the arrows 8d parallel to the workpiece axis of rotation 1.1.
  • both the first conditioning device 7a for dressing the grinding wheels 2a, 2b and the second conditioning device 7b for sharpening the grinding wheels 2a, 2b are brought into a conditioning position in which the conditioning devices 7a and 7b are in contact with one of the grinding wheels 2a, 2b, while the brake disk 1 is machined with the grinding disks 2a, 2b.
  • the grinding wheels 2a, 2b are thus conditioned during the machining process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP21196493.7A 2021-09-14 2021-09-14 Procédé et dispositif d'usinage d'une surface de pièce revêtue de matière dure d'une pièce symétrique en rotation Pending EP4147821A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21196493.7A EP4147821A1 (fr) 2021-09-14 2021-09-14 Procédé et dispositif d'usinage d'une surface de pièce revêtue de matière dure d'une pièce symétrique en rotation
CN202211094173.5A CN115805501A (zh) 2021-09-14 2022-09-08 用于加工工件的覆层有硬质材料的工件面的方法和设备
US17/944,126 US20230083679A1 (en) 2021-09-14 2022-09-13 Method and device for processing a hard-coated workpiece surface of a rotationally symmetrical workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21196493.7A EP4147821A1 (fr) 2021-09-14 2021-09-14 Procédé et dispositif d'usinage d'une surface de pièce revêtue de matière dure d'une pièce symétrique en rotation

Publications (1)

Publication Number Publication Date
EP4147821A1 true EP4147821A1 (fr) 2023-03-15

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EP21196493.7A Pending EP4147821A1 (fr) 2021-09-14 2021-09-14 Procédé et dispositif d'usinage d'une surface de pièce revêtue de matière dure d'une pièce symétrique en rotation

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US (1) US20230083679A1 (fr)
EP (1) EP4147821A1 (fr)
CN (1) CN115805501A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117140273B (zh) * 2023-10-24 2023-12-22 江苏骏马压路机械有限公司 一种压路机发动机外罩生产用打磨砂轮

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988000513A1 (fr) * 1986-07-21 1988-01-28 Tschudin Werkzeugmaschinenfabrik Procede et dispositif de fabrication de pieces tournees coupees dans des barres
DE4039805A1 (de) * 1990-12-13 1992-06-17 Schaudt Maschinenbau Gmbh Schleifscheibe
EP1884314A1 (fr) * 2006-08-03 2008-02-06 Automatismi Brazzale S.R.L Machine, ligne automatique et procédé pour l'usinage superficiel d'éléments en forme de disque
DE102010026026A1 (de) * 2010-07-03 2012-01-05 Emag Holding Gmbh Verfahren und Schleifmaschine zum Schleifen von Rotationsflächen
DE102019128522A1 (de) * 2019-10-22 2021-04-22 J.G. WEISSER SöHNE GMBH & CO. KG Werkzeugmaschine zum Schleifen von Werkstücken, insbesondere von Bremsscheiben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988000513A1 (fr) * 1986-07-21 1988-01-28 Tschudin Werkzeugmaschinenfabrik Procede et dispositif de fabrication de pieces tournees coupees dans des barres
DE4039805A1 (de) * 1990-12-13 1992-06-17 Schaudt Maschinenbau Gmbh Schleifscheibe
EP1884314A1 (fr) * 2006-08-03 2008-02-06 Automatismi Brazzale S.R.L Machine, ligne automatique et procédé pour l'usinage superficiel d'éléments en forme de disque
DE102010026026A1 (de) * 2010-07-03 2012-01-05 Emag Holding Gmbh Verfahren und Schleifmaschine zum Schleifen von Rotationsflächen
DE102019128522A1 (de) * 2019-10-22 2021-04-22 J.G. WEISSER SöHNE GMBH & CO. KG Werkzeugmaschine zum Schleifen von Werkstücken, insbesondere von Bremsscheiben

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Publication number Publication date
US20230083679A1 (en) 2023-03-16
CN115805501A (zh) 2023-03-17

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