EP2394783A1 - Meuleuse cylindrique sans pointe, dispositif et procédé de meulage sans pointe à l'aide d'une plaque de réglage réglable en hauteur - Google Patents

Meuleuse cylindrique sans pointe, dispositif et procédé de meulage sans pointe à l'aide d'une plaque de réglage réglable en hauteur Download PDF

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Publication number
EP2394783A1
EP2394783A1 EP10405115A EP10405115A EP2394783A1 EP 2394783 A1 EP2394783 A1 EP 2394783A1 EP 10405115 A EP10405115 A EP 10405115A EP 10405115 A EP10405115 A EP 10405115A EP 2394783 A1 EP2394783 A1 EP 2394783A1
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EP
European Patent Office
Prior art keywords
grinding
workpiece
regulating wheel
wheel
rotation
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.)
Granted
Application number
EP10405115A
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German (de)
English (en)
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EP2394783B1 (fr
Inventor
Urs Tschudin
Libor Dr. Sedlacek
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Individual
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Individual
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Priority to EP20100405115 priority Critical patent/EP2394783B1/fr
Priority to ES10405115.6T priority patent/ES2470645T3/es
Priority to US13/156,785 priority patent/US9085059B2/en
Publication of EP2394783A1 publication Critical patent/EP2394783A1/fr
Application granted granted Critical
Publication of EP2394783B1 publication Critical patent/EP2394783B1/fr
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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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • 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
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/30—Regulating-wheels; Equipment therefor
    • 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
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/307—Means for supporting work

Definitions

  • the invention relates to the technical field of manufacturing technology, and more particularly to a centerless grinding machine according to claim 1, an arrangement of a centerless grinding workpiece according to claim 16 and a corresponding method according to claim 18.
  • Centerless cylindrical grinding usually involves sanding above or below the centers of the grinding and regulating wheel.
  • the tangent angle at which the workpiece abuts the grinding and regulating wheel is typically between 6 and 11 degrees.
  • the workpiece support is adjusted in height. This happens, for example, via a wedge, an eccentric shaft or via a motor-adjustable axle.
  • the diamond for dressing the regulating wheel in the center height i. be brought to the height of the axis of rotation of the workpiece to obtain a straight surface line at the contact height of the workpiece with the regulating wheel.
  • the diamond height of the regulating wheel must first be designed adjustable. However, an exact adjustment is still difficult because the dressing must be carried out offset to the circumference.
  • the support When working in the oblique engraving method, where the axis of rotation of the grinding wheel is not parallel to the workpiece support and the axis of rotation of the regulating wheel, the support must be tilted to avoid distortion to avoid or minimize a shoulder of the workpiece.
  • an essential point of the cylindrical grinding machine according to the invention is that now the centers of the grinding wheel and the workpiece lie in one plane and an adjustment of the workpiece support exclusively via a - decoupled from all other movements - Height adjustment of the regulating wheel is made.
  • the respective center of the grinding and regulating wheel as well as the workpiece is to be understood in the following to mean the point which is formed by the latter in the viewing direction of the respective axis of rotation.
  • a stable axle can be constructed for the height adjustment of the regulating wheel.
  • the center height of the workpiece can be adjusted very accurately via the procedure of the infeed carriage of the regulating wheel.
  • This can be used to grind always at the optimum height, especially at large Abschliff, in which the diameter of the workpiece changes.
  • the diamond or the rotating dressing tool for the regulating wheel can be mounted at a fixed height because the regulating wheel can be moved to the correct height.
  • the height of its axis of rotation can come to lie both above and below the common plane. Since all settings on only one axis, namely the corresponding position of the axis of rotation of the regulating wheel are made, a particularly simple construction of the machine is possible.
  • the axes of rotation of the grinding wheel and the regulating wheel are not aligned axially parallel to each other, in particular are arranged for Schrägeinstichschleifen.
  • there is the need for an angular position of the axes of the workpiece profile for example, a diagonal stitch requires.
  • also from the nature of the grinding process such as during continuous grinding with an axis that is inclined a slope forming to the other axis. In both cases, it may increasingly lead to profile distortions, which essentially result from removal of the grinding and / or regulating wheel and / or by grinding the workpiece with a consequent wandering of the workpiece from an original position.
  • the height adjustment of the regulating wheel now makes it possible to compensate for these profile distortions by adjusting the regulating wheel alone, whereby the advantages of continuous as Schrägeinstichschleifens, such as grinding high volumes and complex workpiece profiles, are much easier to use.
  • a motor drive for adjusting the regulating wheel is provided.
  • a manual adjustment of the regulating wheel is conceivable.
  • a computing unit for automatically controlling the motor drive is also provided.
  • a computer-controlled drive allows an already high degree of automation, e.g. by using a CNC (Computer Numeric Control) controller. This inaccuracies of a manual presetting are reliably excluded, which increases the machining quality of the workpieces.
  • different heights of the regulating wheel can be approached quickly via the CNC control in order to optimize the roundness of the workpieces.
  • These optimal height settings of the regulating wheel are included preferably deposited on a storage unit and retrievable. Since the values are already available on the machine, a particularly fast presetting of the regulating wheel is possible.
  • These height settings can also be stored workpiece-related, so that a quick changeover to different workpieces is possible. As a result, the processing time per workpiece decreases, which enables a rapid passage of different batches.
  • a particularly high degree of automation arises from the fact that the arithmetic unit is connected to the memory unit for retrieving optimum height settings of the regulating wheel. As a result, the usually required set-up time of the machine drops again considerably, since the regulating wheel can automatically retrieve the optimum height setting in each case and start in the sequence.
  • the arithmetic unit is further preferably designed to compensate for deviations of the axis of rotation of the workpiece from the common plane with the axis of rotation of the grinding wheel out by adjusting the regulating wheel. Such a deviation can be caused by removal of the grinding and / or regulating wheel and / or by grinding of the workpiece itself. This can be compensated by the fact that the arithmetic unit reacts to measured values of a corresponding sensor system which detects an emigration of the workpiece from its original center position. In the memory unit optimum height settings are stored for each of these deviations, which are approached by the regulating wheel.
  • the arithmetic unit is also for automatically dressing the regulating wheel on at least one Dressing tool designed, which also the dressing process can be carried out automatically and thus easily, quickly and reliably. This reduces the set-up time of the machine before the actual grinding process.
  • the at least one dressing tool is guided in the common plane of the rotation axis of the grinding wheel and the axis of rotation of the workpiece. This eliminates all adjustments in the height of the tool, which on the one hand simplifies the construction of the machine and on the other hand makes the dressing itself very simple and reliable. In addition, the tool is easily accessible for maintenance, since it is arranged to be moved out between the grinding wheel and the regulating wheel.
  • the at least one dressing tool can be controlled and moved in a changeable position and / or via additional axes. This facilitates the dressing of the grinding as well as the regulating wheel itself on such workpiece geometries that change greatly along the axis of rotation of the workpiece.
  • the grinding machine is thus also quickly and reliably adjustable to workpieces that are considered to be rather difficult to grind.
  • the at least one dressing tool has a dressing diamond or a dressing device for the grinding wheel and / or a dressing diamond or a dressing device for the regulating wheel or is prepared for the optional assembly with such dressing devices.
  • the dressing diamond or the dressing device can be the first dressing tool for the grinding wheel and / or used as a second dressing tool for the regulating wheel.
  • the grinding machine further includes a coolant supply, through which coolant can be brought into an engagement region of the grinding wheel with the workpiece.
  • a reliable cooling is ensured, whereby the life of the grinding and regulating wheel is increased.
  • Another advantage of this direct cooling is the assurance of high thermal stability.
  • an outlet nozzle of the coolant supply can be attached to a housing of the machine. Since this nozzle is permanently arranged in the grinding gap, its position must not be compensated for an operational decrease in the diameter of the grinding wheel.
  • the grinding wheel preferably comprises a plurality of partial grinding wheels arranged one behind the other on the axis of rotation of the grinding wheel, and the regulating wheel comprises a plurality of partial regulating wheels arranged one behind the other on the axis of rotation of the regulating wheel.
  • the workpiece support is preferably designed so that the workpiece for performing sequential grinding operations along its axis of rotation is moved sequentially.
  • the workpiece support in the vertical direction is designed to be rigid and movable in the horizontal direction. A total time required for the grinding operation is thereby significantly shortened.
  • the dressing (diamond) of the grinding and regulating wheel and also an oscillation of the workpieces supported is preferably designed so that the workpiece for performing sequential grinding operations along its axis of rotation is moved sequentially.
  • the workpiece support in the vertical direction is designed to be rigid and movable in the horizontal direction. A total time required for the grinding operation is thereby significantly shortened.
  • the dressing (diamond) of the grinding and regulating wheel and also an oscillation of the workpieces supported.
  • the grinding machine is constructed on a machine bed of thermostable natural granite, which ensures a high mechanical and thermal stability of the components of the grinding machine.
  • a significant simplification, acceleration and quality improvement of the grinding process is achieved by compensating for a deviation of the axis of rotation of the workpiece from the common plane with the axis of rotation of the grinding wheel by automatic adjustment of the regulating wheel.
  • abrasions of the grinding and / or regulating wheel and / or a grinding of the workpiece can be detected and an associated optimum height adjustment of the regulating wheel calculated or retrieved, which must be approached by the regulating wheel to compensate for the deviation of the workpiece.
  • the abradings or the abrasion can be derived by an angle change between the center of the regulating wheel and the center of the grinding wheel on the one hand and the center of the regulating wheel and the center of the workpiece on the other hand.
  • the dressing tool is guided in the common plane of the axis of rotation of the grinding wheel and the axis of rotation of the regulating wheel, eliminates errors that may be caused by a height-adjustable tool.
  • the dressing tool can be rigidly mounted in the vertical direction be. Since therefore only the regulating wheel must be adjusted to perform the dressing process, this can be carried out according to more accurate and reliable.
  • FIG. 1 shows a schematic diagram of the inventive arrangement of grinding wheel 10, regulating wheel 20 and workpiece 30.
  • the workpiece 30 is located on a workpiece support 40 which is dimensioned and arranged in accordance with the dimensions of the workpiece 30 that according to the invention a center of the workpiece 30, ie its axis of rotation A-30 (Axis-30), in a common plane P (plane) with the center of the grinding wheel 10, that is, the axis of rotation A-10.
  • the grinding wheel 10 and the regulating wheel 20 along the directions H-10 (horizontal-10) and H-20 deliver the workpiece 30 and remove it again when the grinding process is completed.
  • the discs 10 and 20 rotate during grinding in the specified directions R-10 and R-20.
  • a center or a rotation axis A-20 of the regulating wheel 20 has, relative to the plane P, a height adjustment D (displacement) according to the invention, by which it is moved vertically beyond the plane P.
  • the axis of rotation A-20 of the regulating wheel 20 is shifted downwards relative to the plane P in the height adjustment D.
  • the axis of rotation A-20 can also be adjusted by the height adjustment D upwards compared to the plane P.
  • the regulating wheel 20 can be moved in the directions V-20, and decoupled from the movements along the directions H-20.
  • All adjustments required for grinding are made solely via the regulating wheel 20.
  • Whose control can have a memory unit, are deposited in the optimal height settings D depending on the workpiece 30 to be grounded and retrieved by an operator.
  • the storage unit can also record height settings D, which are dependent on a removal of the grinding wheel 10 and / or the regulating wheel 20 and / or by grinding the workpiece 30 are approached.
  • a sensor system may be provided for this purpose, which detects a wandering of the workpiece 30 out of its position via an angle change between the center A-20 of the regulating wheel 20 and the center A-10 of the grinding wheel 10.
  • the inventive arrangement is structurally particularly easy to implement by the sole height adjustment of the regulating wheel 20, especially in the area of the regulating wheel 20 is enough space for arranging a corresponding stable vertical guidance including motor drive.
  • all process-relevant adjustments and adjustments via the regulating wheel 20 alone feasible, which significantly simplifies the control of grinding.
  • This control can also be used to deliver the regulating wheel 20 to a dressing tool (not shown) ideally located between the discs 10 and 20 in the plane P.
  • a dressing tool not shown
  • the arrangement according to the invention allows for a particularly simple construction of a respective grinding machine, which moreover has a high degree of automation, with the result of significantly easier, faster and more accurate machining of the workpieces.
  • FIG. 2 shows a perspective view obliquely from above on a first arrangement according to the invention of grinding wheel 10, regulating wheel 20 and workpiece 30 in a straight recess, with the same functional elements as in FIG FIG. 1 ,
  • the FIG. 2 serves in particular the representation of spatial aspects of the inventive arrangement. It can thus be seen that the workpiece 30 has different diameters. A wandering of the workpiece 30 from a desired center position can only by Removal of the grinding wheel 10 and / or the regulating wheel 20 and / or carried out by grinding of the workpiece 30 itself. Profile distortions are not usually expected in this arrangement.
  • the axis of rotation A-20 of the regulating wheel 20 would be slightly inclined in order to produce a gradient along which the workpiece 30 moves between the disks 10, 20. In the case of a non-optimal height adjustment of the regulating wheel 20, this would lead to profile distortions over the entire circumference of the workpiece 30.
  • An optimal surface contact of the regulating wheel 20 to the workpiece 30 is according to the invention but now by adjusting a height adjustment D of the regulating wheel 20 on the plane P (see FIG. 1 ) along the V-20 directions.
  • FIG. 3 shows a perspective view obliquely from above on a second arrangement according to the invention of grinding wheel 10 ', regulating wheel 20' and workpiece 30 'in an oblique recess.
  • This figure is intended to clarify the spatial aspects of the inventive arrangement again.
  • Grinding and regulating wheel 10 'and 20' are thereby the workpiece 30 'delivered at an angle between the directions H-10' and H-20 '.
  • Such a puncture is particularly applied where in a single operation a cylindrical seat of the workpiece 30 'is to be ground together with his / her shoulder (s).
  • This control can provide that an optimum height adjustment D 'of the regulating wheel 20' with respect to the grinding wheel 10 'and the workpiece 30' automatically approached and even with changing diameters of the discs 10 ', 20' and / or the workpiece 30 'is adjusted .
  • a sensor system may be provided which, for example, determines the angle between a connection of the centers A-10 'and A-20' and / or the centers A-30 'and A-20', in each case to the plane P '.
  • the axis of rotation A-20 ' can also be offset upwards relative to the plane P' by the height adjustment D '.
  • Associated values of optimal height settings D ' may be stored in a memory unit accessed by the controller, to adjust the regulating wheel 20 'accordingly. Even in the oblique puncture thus a highly automated, faster and high-quality grinding of the workpiece 30 'is possible, and this also with a simple and inexpensive construction of a corresponding grinding machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP20100405115 2010-06-14 2010-06-14 Meuleuse cylindrique sans pointe et procédé de meulage sans pointe à l'aide d'une plaque de réglage réglable en hauteur Active EP2394783B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20100405115 EP2394783B1 (fr) 2010-06-14 2010-06-14 Meuleuse cylindrique sans pointe et procédé de meulage sans pointe à l'aide d'une plaque de réglage réglable en hauteur
ES10405115.6T ES2470645T3 (es) 2010-06-14 2010-06-14 Rectificadora cilíndrica sin centros y procedimiento para el rectificado sin centros con disco regulable desplazable en altura
US13/156,785 US9085059B2 (en) 2010-06-14 2011-06-09 Centerless cylindrical grinding machine and centerless grinding method with height-adjustable regulating wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100405115 EP2394783B1 (fr) 2010-06-14 2010-06-14 Meuleuse cylindrique sans pointe et procédé de meulage sans pointe à l'aide d'une plaque de réglage réglable en hauteur

Publications (2)

Publication Number Publication Date
EP2394783A1 true EP2394783A1 (fr) 2011-12-14
EP2394783B1 EP2394783B1 (fr) 2014-03-19

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EP20100405115 Active EP2394783B1 (fr) 2010-06-14 2010-06-14 Meuleuse cylindrique sans pointe et procédé de meulage sans pointe à l'aide d'une plaque de réglage réglable en hauteur

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US (1) US9085059B2 (fr)
EP (1) EP2394783B1 (fr)
ES (1) ES2470645T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104842229A (zh) * 2015-06-10 2015-08-19 重庆跃进机械厂有限公司 长杆零件无心磨加工方法
EP3269500A1 (fr) * 2016-07-12 2018-01-17 Tschudin GmbH Grenchen Procede et dispositif de rectification cylindrique sans pointe simultanee de plusieurs pieces usinees
CN112476085A (zh) * 2020-11-10 2021-03-12 浙江浪潮精密机械有限公司 一种刀具柄部全自动化无心磨削加工设备及方法
DE102021123380B3 (de) 2021-09-09 2022-12-22 Schaeffler Technologies AG & Co. KG Vorrichtung und Verfahren zur spanabhebenden Bearbeitung von rotierenden Werkstücken

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
DE102010026663A1 (de) * 2010-07-09 2012-01-12 Emag Holding Gmbh Schleifmaschine zum Schleifen von Nockenscheiben
CN104209821A (zh) * 2014-09-05 2014-12-17 河北富恒轴承科技开发有限公司 圆锥滚子无心磨床恒中心高磨削方法
US10195709B2 (en) 2015-02-09 2019-02-05 Glebar Acquisition, Llc Motorized blade rest apparatus and grinding system with motorized blade rest apparatus
JP6625463B2 (ja) * 2015-03-31 2019-12-25 日本碍子株式会社 円柱部材の外周加工装置、及び円柱部材の製造方法
JP7082583B2 (ja) * 2019-01-24 2022-06-08 日本碍子株式会社 セラミックスハニカム構造体の加工方法及び加工装置
IT202000022861A1 (it) * 2020-09-28 2022-03-28 Consiglio Nazionale Ricerche Metodo per la minimizzazione delle ondulazioni su un pezzo da lavorare mediante un processo di rettifica

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US4570387A (en) * 1983-05-27 1986-02-18 Toyoda Koki Kabushiki Kaisha Centerless grinding machine
JP2003191153A (ja) * 2001-12-25 2003-07-08 Toshin Technical:Kk 心なし研削盤

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US1722386A (en) * 1922-11-21 1929-07-30 Cincinnati Grinders Inc Centerless grinding machine
US2020541A (en) * 1933-09-08 1935-11-12 Cincinnati Grinders Inc Grinding machine
US4062150A (en) * 1975-09-10 1977-12-13 Hitachi, Ltd. Centerless grinding method and device using same
US4083151A (en) * 1977-06-06 1978-04-11 Cincinnati Milacron Inc. Angular feed centerless grinder
US4783932A (en) * 1987-02-11 1988-11-15 Sager Russell J Centerless grinder construction

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US4570387A (en) * 1983-05-27 1986-02-18 Toyoda Koki Kabushiki Kaisha Centerless grinding machine
JP2003191153A (ja) * 2001-12-25 2003-07-08 Toshin Technical:Kk 心なし研削盤

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104842229A (zh) * 2015-06-10 2015-08-19 重庆跃进机械厂有限公司 长杆零件无心磨加工方法
EP3269500A1 (fr) * 2016-07-12 2018-01-17 Tschudin GmbH Grenchen Procede et dispositif de rectification cylindrique sans pointe simultanee de plusieurs pieces usinees
US10232484B2 (en) 2016-07-12 2019-03-19 Tschudin GmbH Grenchen Method and device for simultaneous centreless cylindrical grinding of multiple workpieces
CN112476085A (zh) * 2020-11-10 2021-03-12 浙江浪潮精密机械有限公司 一种刀具柄部全自动化无心磨削加工设备及方法
DE102021123380B3 (de) 2021-09-09 2022-12-22 Schaeffler Technologies AG & Co. KG Vorrichtung und Verfahren zur spanabhebenden Bearbeitung von rotierenden Werkstücken

Also Published As

Publication number Publication date
US9085059B2 (en) 2015-07-21
ES2470645T3 (es) 2014-06-24
EP2394783B1 (fr) 2014-03-19
US20110306273A1 (en) 2011-12-15

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