EP1920884B1 - Procédé destiné au traitement de finition de bandes de surfaces circonférentielles de pièces à usiner - Google Patents

Procédé destiné au traitement de finition de bandes de surfaces circonférentielles de pièces à usiner Download PDF

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Publication number
EP1920884B1
EP1920884B1 EP20070020675 EP07020675A EP1920884B1 EP 1920884 B1 EP1920884 B1 EP 1920884B1 EP 20070020675 EP20070020675 EP 20070020675 EP 07020675 A EP07020675 A EP 07020675A EP 1920884 B1 EP1920884 B1 EP 1920884B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
strip
convex
concave
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.)
Expired - Fee Related
Application number
EP20070020675
Other languages
German (de)
English (en)
Other versions
EP1920884A1 (fr
Inventor
Holger Steinwender
Martin Herbert Lupp
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
Publication of EP1920884A1 publication Critical patent/EP1920884A1/fr
Application granted granted Critical
Publication of EP1920884B1 publication Critical patent/EP1920884B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-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
    • B24B19/12—Single-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

Definitions

  • the invention relates to a method for strip finishing of workpiece peripheral surfaces using an endless and driven abrasive belt, wherein the abrasive belt is pressed for working konkaver surface portions of a workpiece by means of a roller against the workpiece surface to be machined.
  • Such a method is for example from the document DE 103 42 135 A1 known.
  • the workpiece to be machined is partially wrapped by the abrasive belt so that the abrasive belt lies flat against the circumference of the workpiece.
  • the DE 103 42 137 A1 describes a method for finish machining crankshafts and camshafts by means of an endless abrasive belt which is associated with a dressing roller to prevent uneven wear of the abrasive layer.
  • a method for finish machining of non-cylindrical camshafts is from the document US 2004/0029499 A1 known.
  • two support rollers press the abrasive belt against the rotating workpiece.
  • the abrasive belt is not endless, but is used after a single contact with the workpiece on a spool for spent Sanding belt wound up.
  • the surface of the workpiece is processed linearly in two contact zones with the grinding belt.
  • DE 40 29 129 A1 For example, a method for grinding cams by means of a revolving belt is described.
  • the sanding belt is guided over a deflection roller which presses the sanding belt against the cam surface to be machined.
  • the invention has for its object to provide a fast and effective method for finish machining of workpieces, in particular of camshafts, with both convex and concave surface portions on the workpiece circumference.
  • the object is achieved in that the grinding belt is applied with a free-tensioned band section to the convex surface portions of a workpiece.
  • the method according to the invention enables a flat support of the grinding belt on the workpiece surface to be machined, even in the concave surface regions.
  • the tape is moved at high tape speeds, and easily oscillatory movements can be superimposed. It will be with one on the respective surface area optimally adapted tool geometry achieves an improvement of the workpiece surface.
  • the inventive method is much more effective than the machining of the concave surface sections with honing stones.
  • the high working speed of the sanding belt enables high removal rates.
  • the inventive method is also very flexible, since it can be used largely independently of the workpiece geometry.
  • the tape follows in the processing of the predetermined shape of the workpiece, in particular to act on the surface roughness.
  • the abrasive belt can be guided over a deflection roller, wherein the deflection roller and the workpiece for processing the convex and concave surfaces are adjusted relative to each other.
  • the deflection roller can be adjusted, for example, transversely to the direction of tape travel to change the wrap angle of the free-tensioned belt section in the processing of convex surface portions and adapt to the curvature of the convex surface portion.
  • the guide roller can be adjusted, for example in the direction of tape travel and thereby press the abrasive belt against the machined concave workpiece surface.
  • the method according to the invention makes it possible, during machining, to switch from the finishing of convex surface sections to the finishing of concave surface sections. In each case optimum strip contours for the respective surface section to be processed are used.
  • the sanding belt can alternatively be pressed against the concave surface portions of the workpiece surfaces to be machined by means of a pressure roller, which is adjustable transversely to the strip running direction and acts on the free-tensioned belt section.
  • the tape always adapts to the shape of the workpiece to avoid a change in shape.
  • the workpiece is rotated during processing and the feed movement of the roller pressing the grinding belt against concave surfaces is controlled as a function of the angular position of the workpiece.
  • first the concave surface sections of the workpiece and subsequently the convex surface sections are machined.
  • the workpiece may be at rest when the concave surface portions are machined while the workpiece is rotating during subsequent processing of the convex surface portions.
  • the strip finish machining is specifically controlled to optimize the workpiece surface.
  • the band contour can be individually adapted to convex or concave surface sections.
  • the roller In order to enable surface contact with the sanding belt during machining of the concave surface sections, the roller preferably has a surface that is soft compared to steel, for example Vulkollan or rubber, in particular of low Shore hardness.
  • the Fig. 1a and 1b show an inventive method for strip finishing of workpiece peripheral surfaces having convex and concave surface portions, using an endless and driven abrasive belt 1.
  • the workpiece to be machined is in the exemplary embodiment to a camshaft 2.
  • the grinding belt. 1 pressed by means of a roller 3 against the workpiece surface to be machined (see Fig. 1b ).
  • the grinding belt 1 is applied to the camshaft 2 with a free-tensioned belt section (see Fig. 1a ).
  • the sanding belt 1 is guided over the roller 3, which is also designed as a deflection roller.
  • the deflection roller 3 is adjusted for machining the convex and concave surfaces of the camshaft 2 relative to this (see arrows in the Fig. 1a and 1b ).
  • Fig. 1a the deflection roller 3 is moved transversely to the strip running direction to change the wrap angle ⁇ of the free-tensioned band section during the processing of convex surface portions and adapted to the curvature of the convex surface portion.
  • the guide roller 3 is adjusted in the strip running direction and thus presses the machining of the concave surface sections the sanding belt 1 against the camshaft 2. With an optimally adapted to the surface of the camshaft 2 contour of the sanding belt 1 is achieved in the camshaft 2, a surface improvement.
  • a pressure roller 4 is additionally provided, which is adjustable transversely to the direction of tape travel.
  • the pinch roller 4 is in a rest position and is spaced from the sanding belt 1.
  • the pinch roller 4 acts on the free-tensioned belt section and presses the sanding belt 1 against the concave workpiece surface.
  • the workpiece 2 is rotated during processing.
  • the feed movement of the grinding belt against the concave workpiece surfaces pressing roller 3 and 4 is controlled in dependence of the angular position of the workpiece 2, so that the roller 3, 4 abuts the corresponding angle on the concave surface.
  • Optimal for the machining time is a process with continuous rotation of the workpiece, wherein the feed movement of the roller 3, 4 is controlled in the manner described above during the continuous rotation of the workpiece 2.
  • An existing under the teaching of the invention method variant is that first the concave surface portions of the workpiece 2 are processed with appropriate delivery of the roller 3, 4 and then the convex surface portions, ie the in the Fig. 1b or 2b illustrated process steps are prior to the process steps in the Fig. 1a and 2a carried out.
  • the workpiece 2 is at rest when the concave surface portions are processed, while the workpiece 2 rotates in the subsequent processing of the convex surface portions.
  • the method according to the invention makes it possible to control the strip finishing process for optimizing the workpiece surface.
  • abrasive belt 1 and workpiece 2 can be selected during machining between a concave or a convex geometry.
  • This Bermmkontur can also be changed during processing, so that the grinding belt 1 follows the predetermined shape of the workpiece 2 and thus does not change the shape of the workpiece 2, but only edited its surface roughness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (9)

  1. Procédé d'usinage fini à la bande de surfaces périphériques de pièces, qui présentent des sections de surfaces convexes et concaves, en utilisant une bande abrasive (1) sans fin et entraînée,
    la bande abrasive (1), pour l'usinage de sections de surfaces concaves d'une pièce (2), étant pressée au moyen d'un rouleau contre la surface de la pièce à usiner,
    caractérisé en ce que la bande abrasive (1) est appliquée par une section de bande librement tendue sur les sections de surfaces convexes de la pièce (2).
  2. Procédé suivant la revendication 1, caractérisé en ce que la bande abrasive (1) est guidée par l'intermédiaire d'une poulie de renvoi (3), la poulie de renvoi (3) et la pièce (2) étant déplacées l'une par rapport à l'autre pour l'usinage des surfaces convexes et concaves.
  3. Procédé suivant la revendication 2, caractérisé en ce que la poulie de renvoi (3) est déplacée transversalement à la direction de défilement de la bande, pour modifier l'angle d'enroulement (α) de la section de bande librement tendue et l'adapter à la courbure de la section de surface convexe.
  4. Procédé suivant la revendication 2, caractérisé en ce que la poulie de renvoi (3) est déplacée dans la direction de défilement de la bande et presse la bande abrasive (1) contre la surface de la pièce à usiner lors de l'usinage des sections de surfaces concaves de la pièce (2).
  5. Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que la bande abrasive (1) est pressée contre les sections de surfaces concaves de la surface de la pièce à usiner au moyen d'un rouleau presseur (4), qui peut être déplacé transversalement à la direction de défilement de la bande et agit sur la section de bande librement tendue.
  6. Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la pièce (2) est tournée pendant l'usinage et le mouvement d'avance du rouleau (3, 4), pressant la bande abrasive (1) contre des surfaces concaves, est réglé en fonction de la position angulaire de la pièce (2).
  7. Procédé suivant la revendication 6, caractérisé en ce que la pièce (2) est tournée en continu pendant l'usinage.
  8. Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que sont usinés d'abord les sections de surfaces concaves de la pièce (2), puis les sections de surfaces convexes.
  9. Procédé suivant la revendication 8, caractérisé en ce que la pièce (2) est au repos lorsque les sections de surfaces concaves sont usinées, la pièce (2) tournant pendant l'usinage consécutif des sections de surfaces convexes.
EP20070020675 2006-11-09 2007-10-23 Procédé destiné au traitement de finition de bandes de surfaces circonférentielles de pièces à usiner Expired - Fee Related EP1920884B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610052829 DE102006052829A1 (de) 2006-11-09 2006-11-09 Verfahren zur Bandfinishbearbeitung von Werkstückenumfangsflächen

Publications (2)

Publication Number Publication Date
EP1920884A1 EP1920884A1 (fr) 2008-05-14
EP1920884B1 true EP1920884B1 (fr) 2009-05-13

Family

ID=38792020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070020675 Expired - Fee Related EP1920884B1 (fr) 2006-11-09 2007-10-23 Procédé destiné au traitement de finition de bandes de surfaces circonférentielles de pièces à usiner

Country Status (3)

Country Link
EP (1) EP1920884B1 (fr)
JP (1) JP2008119824A (fr)
DE (2) DE102006052829A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5379607B2 (ja) * 2009-08-27 2013-12-25 株式会社サンシン 研磨方法及びその装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU209638B (en) * 1989-10-27 1994-09-28 Miskolci Egyetem Method and apparatus for generating machining with abrasive belt
DE4029129C2 (de) 1990-09-13 1994-12-22 Bayerische Motoren Werke Ag Vorrichtung zum Schleifen von insbesondere hohlen Nocken
DE4235408A1 (de) * 1992-10-21 1994-04-28 Schaudt Maschinenbau Gmbh Verfahren und Vorrichtung zum Schleifen von unrunden Werkstücken
FR2835460B1 (fr) * 2002-02-05 2004-07-23 Procedes Et Machines Speciales Procede et dispositif d'usinage par bande abrasive d'une surface de portee sur une piece, notamment pour la superfinition d'une surface de came sur un arbre a cames
DE10342137B4 (de) * 2003-09-12 2010-07-29 Thielenhaus Technologies Gmbh Vorrichtung und Verfahren zur Finishbearbeitung von Wellen, insbesondere von Kurbel- und Nockenwellen
DE10342139B4 (de) * 2003-09-12 2008-06-19 Thielenhaus Technologies Gmbh Verfahren zur Finishbearbeitung von Umfangsflächen an wellenförmigen Werkstücken
DE10342135A1 (de) * 2003-09-12 2005-04-07 Thielenhaus Technologies Gmbh Vorrichtung zur Finishbearbeitung von Wellen, insbesondere Kurbel- und Nockenwellen

Also Published As

Publication number Publication date
EP1920884A1 (fr) 2008-05-14
DE502007000725D1 (de) 2009-06-25
JP2008119824A (ja) 2008-05-29
DE102006052829A1 (de) 2008-05-15

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