EP2162260B1 - Verfahren zum schleifen von nocken einer nockenwelle - Google Patents

Verfahren zum schleifen von nocken einer nockenwelle Download PDF

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Publication number
EP2162260B1
EP2162260B1 EP08757924A EP08757924A EP2162260B1 EP 2162260 B1 EP2162260 B1 EP 2162260B1 EP 08757924 A EP08757924 A EP 08757924A EP 08757924 A EP08757924 A EP 08757924A EP 2162260 B1 EP2162260 B1 EP 2162260B1
Authority
EP
European Patent Office
Prior art keywords
camshaft
cams
workpiece
grinding
cam
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.)
Active
Application number
EP08757924A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2162260A1 (de
Inventor
Roland 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.)
EMAG Holding GmbH
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EMAG Holding GmbH
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Filing date
Publication date
Application filed by EMAG Holding GmbH filed Critical EMAG Holding GmbH
Publication of EP2162260A1 publication Critical patent/EP2162260A1/de
Application granted granted Critical
Publication of EP2162260B1 publication Critical patent/EP2162260B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/12Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding cams or camshafts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/0076Other grinding machines or devices grinding machines comprising two or more grinding tools

Definitions

  • the invention relates to a method for grinding cams of a camshaft.
  • From the JP 2005052912 A is a machine known for finishing of camshafts.
  • a corresponding number of finishing units are arranged around the camshaft.
  • the machine is difficult for the operator to access.
  • the camshaft can not be supported with steady rests, because the space required for this is added with finishing units.
  • the machine is therefore not suitable for grinding with high removal rates.
  • multiaxial motion sequences are necessary for loading and unloading, since the camshafts inevitably have to be moved lengthwise into and out of the working area.
  • the EP 0 085 225 B1 shows a method for grinding of camshafts, wherein to achieve a uniform feed rate, the rotational speed of the camshaft is adapted to the cam contour. After this procedure, the cams are processed one by one. From the DE 10 2004 012 385 is a machine tool for machining undulating workpieces known. Turrets with driven tools, also for grinding, are provided on both sides of the workpiece spindle. For loading and unloading at least one revolver is equipped with a gripping device for workpieces.
  • the invention is based on the object to improve a method of the type described above so that a grinding machining with increased removal rates is possible. At the same time, the accessibility of the machine should be improved.
  • the rotational speed of the camshaft is adjusted to the cam contour, ie, when grinding the areas between the cam lobe and the base circle contour, the rotational speed is slowed down.
  • An advantageous aspect The invention is to process according to this method camshafts with mirror-image arranged cams with two grinding spindles simultaneously.
  • the method is particularly suitable for machining camshafts for four-cylinder internal combustion engines. These camshafts have four cams or pairs of cams, which are arranged in pairs in mirror image to the longitudinal axis of the camshaft.
  • the first two cams or pairs of cams are first processed in a single clamping, the grinding spindles are moved along the longitudinal axis of the camshaft to the still unprocessed cams, and finally the second cams or pairs of cams are subjected to grinding.
  • loading and unloading can be done from the operator side and the support of the camshaft, for example, with lunettes, from the back. Since, unlike the prior art, only two grinding spindles are used, there is sufficient space for the support and the automatic loading available.
  • two workpiece grippers are provided for loading and unloading. While the first workpiece gripper grips the finished camshaft and deposits it on the transport device, the second workpiece gripper detects an unprocessed camshaft from the transport device and places it in the workpiece holding device.
  • Fig. 1 shows a machine tool 1 for machining camshafts 7, not essential to the invention details of the drive, the controller and the housing are not shown.
  • the camshafts 7 are clamped in the workpiece holding device 6, consisting of the workpiece spindle 8 and the tailstock 9 and set in rotation.
  • the two grinding spindles 10 and 11 are arranged on both sides of the workpiece rotation axis 16. They are guided on the machine frame 2 in two mutually orthogonal directions (X and Z axis) movable.
  • vertical guides 3 are provided for the vertical slide 4 on the machine frame 2 and these in turn carry guides 12 for the Horizontal carriage 5.
  • the intake and removal of the camshaft 7 via transport devices 13, 13 '.
  • Fig. 2 shows that the workpiece rotation axis 16 and the rotation axes 19, 19 'of the grinding spindles 10, 11 are arranged in a plane.
  • the bezel 15 is arranged to support the camshaft 7.
  • the guides 3, the workpiece holding device 6 and the bezel 15 are arranged on a vertical wall 20 of the machine frame 2.
  • the unprocessed camshafts 7 are supplied with the transport device 13 and finished camshafts are discharged from the transport device 13 '.
  • the first workpiece gripper 14 ' grips the finished camshaft and places it on the transport device 13'.
  • the second workpiece gripper 14 detects an unprocessed camshaft from the transporting device 13 and places it in the workpiece holding device 6.
  • the arrangement of the grinding spindles 10, 11 on opposite sides of the workpiece rotation axis 16 and the attachment of the bezel 15 hiss the vertical guides 3 improves accessibility considerably.
  • the camshaft 7 can be inserted by simple circular arc pivotal movements of the operating side in the workpiece holding device 6.
  • the Figures 3 and 4 show snapshots of the loading process.
  • the Fig. 3 shows the workpiece gripping devices 14, 14 'during the pivoting movement.
  • the workpiece grippers 19, 19 ' are designed as a pivot lever.
  • the camshaft 7 for loading and unloading between the transport devices 13, 13 'and the workpiece holding device 6 on circular tracks 21, 21' moves.
  • an unprocessed camshaft is inserted into the workpiece holding device 6 and at the same time the finished camshaft 7 is deposited on the transport device 13 '.
  • the grinding wheels 22, 22 ' shown partially broken.
  • the workpiece gripper 14 For gripping the camshafts 7, the workpiece gripper 14 is provided with a pair of pliers 23. When the pliers are open, the workpiece gripper 14 can pivot into or out of the area of the workpiece rotation axis 16 for gripping or inserting the camshaft 7 along the circular path 21.
  • the Fig. 6 shows details of the camshaft 7 with the workpiece rotation axis 16 in the side view.
  • Each cam has a base circle contour 17, beyond which protrudes the cam lobe 18.
  • the cam lobes 18 are arranged in mirror image with respect to the workpiece rotation axis 16 and enclose angles of 90 ° with each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP08757924A 2007-06-13 2008-04-12 Verfahren zum schleifen von nocken einer nockenwelle Active EP2162260B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007027832 2007-06-13
PCT/DE2008/000542 WO2008151586A1 (de) 2007-06-13 2008-04-12 Verfahren und vorrichtung zum schleifen von nocken einer nockenwelle

Publications (2)

Publication Number Publication Date
EP2162260A1 EP2162260A1 (de) 2010-03-17
EP2162260B1 true EP2162260B1 (de) 2010-10-13

Family

ID=39708320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08757924A Active EP2162260B1 (de) 2007-06-13 2008-04-12 Verfahren zum schleifen von nocken einer nockenwelle

Country Status (7)

Country Link
US (1) US8398455B2 (zh)
EP (1) EP2162260B1 (zh)
CN (1) CN101687303B (zh)
AT (1) ATE484358T1 (zh)
DE (2) DE502008001547D1 (zh)
ES (1) ES2354592T3 (zh)
WO (1) WO2008151586A1 (zh)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007051904B3 (de) * 2007-10-29 2009-02-12 Emag Holding Gmbh Werkzeugmaschine
DE102009024209B4 (de) * 2009-06-08 2012-12-06 Erwin Junker Maschinenfabrik Gmbh Verfahren und vorrichtung zum mehrlagenschleifen von werkstücken
DE102010026663A1 (de) * 2010-07-09 2012-01-12 Emag Holding Gmbh Schleifmaschine zum Schleifen von Nockenscheiben
DE102012012331B4 (de) * 2011-07-28 2016-03-03 Emag Holding Gmbh Werkzeugmaschine
DE102011110118B4 (de) * 2011-08-15 2015-07-09 Emag Holding Gmbh Simultanschleifmaschine
US20160045996A1 (en) * 2011-08-15 2016-02-18 Emag Holding Gmbh Simultaneous grinding machine
US9687919B2 (en) * 2012-09-17 2017-06-27 Schaeffler Technologies AG & Co. KG Method and system for introducing recesses in workpiece surfaces to be machined, with the aid of at least one tool
DE102014106924A1 (de) 2014-05-16 2015-11-19 Thyssenkrupp Presta Teccenter Ag Verfahren zur Herstellung einer gebauten Nockenwelle
DE102014013120A1 (de) 2014-09-03 2016-03-03 Emag Holding Gmbh Werkzeugmaschine
US10309474B2 (en) * 2015-03-25 2019-06-04 ITT Italian S.r.l. Automated finishing station for a brake pad
DE102015007023B3 (de) * 2015-05-30 2016-11-10 Emag Holding Gmbh Schleifmaschine
DE102016116161A1 (de) 2016-08-30 2018-03-01 Supfina Grieshaber Gmbh & Co. Kg Werkzeugmaschine und Verfahren zur finishenden Bearbeitung von Werkstücken
CN108372445A (zh) * 2018-05-23 2018-08-07 平湖乾丰机械有限公司 一种凸轮轴凸轮抛光机
CN110370110B (zh) * 2019-06-27 2021-08-24 江苏理工学院 一种汽车凸轮轴端面打磨装置
CN111843771A (zh) * 2020-07-31 2020-10-30 汪小林 一种可防止磨轮异形误差的校准磨具

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE431052C (de) 1926-06-28 Churchill Machine Tool Co Ltd Maschine zum Schleifen oder Fraesen der Steuerdaumen oder Knaggen an Steuerwellen
US1622755A (en) * 1924-08-18 1927-03-29 Asbridge Harry Hales Cam-grinding machine
US1957568A (en) * 1930-03-03 1934-05-08 Carborundum Co Cam shaft lapping machine
US2771716A (en) * 1955-02-23 1956-11-27 Norton Co Grinding machine-work loader
USRE24885E (en) * 1956-06-05 1960-10-11 Grinding machine-work loader
US4419845A (en) * 1980-03-25 1983-12-13 Ernst Thielenhaus Kg Method of and apparatus for finish-grinding a camshaft
US4443976A (en) 1982-01-29 1984-04-24 Litton Industrial Products, Inc. Cylindrical grinding machine
JPH048405A (ja) * 1990-04-27 1992-01-13 Toyoda Mach Works Ltd 工作主軸装置
DE4103091A1 (de) * 1991-02-01 1992-08-06 Erwin Junker Verfahren und vorrichtung zum gleichzeitigen schleifen aller nocken einer nockenwelle in einer aufspannung
US5722878A (en) * 1995-08-28 1998-03-03 J. D. Phillips Corporation Method and apparatus for microfinishing
US5975995A (en) * 1997-06-25 1999-11-02 Unova Ip Corp. Machining apparatus and method
DE19800885A1 (de) * 1998-01-13 1999-07-15 Thielenhaus Ernst Gmbh & Co Kg Vorrichtung zum Finishen von Umfangsflächen an rotierenden Werkstücken, insbesondere zum Finishen von Kurvenscheiben und Nocken einer Nockenwelle
DE20208792U1 (de) * 2002-06-06 2003-07-24 Niles Simmons Industrieanlagen Dreh-Fräsmaschine
JP3878519B2 (ja) * 2002-07-12 2007-02-07 株式会社ジェイテクト 研削方法
EP1463082A1 (de) 2003-03-26 2004-09-29 Siemens Aktiengesellschaft Elektromagnetisches Schaltgerät
JP2005052912A (ja) 2003-07-31 2005-03-03 Musashi Seimitsu Ind Co Ltd カムシャフトの仕上げ加工装置
DE102004012385B3 (de) * 2004-03-13 2005-09-29 Emag Maschinenfabrik Gmbh Werkzeugmaschine mit hängendem Werkzeugrevolver

Also Published As

Publication number Publication date
ATE484358T1 (de) 2010-10-15
ES2354592T3 (es) 2011-03-16
US20100233939A1 (en) 2010-09-16
DE502008001547D1 (de) 2010-11-25
DE102008026655B4 (de) 2016-06-02
DE102008026655A1 (de) 2008-12-18
CN101687303B (zh) 2013-05-29
WO2008151586A1 (de) 2008-12-18
EP2162260A1 (de) 2010-03-17
US8398455B2 (en) 2013-03-19
CN101687303A (zh) 2010-03-31

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