EP0906173A1 - Dispositif pour rectifier des vilebrequins ou pieces similaires - Google Patents

Dispositif pour rectifier des vilebrequins ou pieces similaires

Info

Publication number
EP0906173A1
EP0906173A1 EP97921768A EP97921768A EP0906173A1 EP 0906173 A1 EP0906173 A1 EP 0906173A1 EP 97921768 A EP97921768 A EP 97921768A EP 97921768 A EP97921768 A EP 97921768A EP 0906173 A1 EP0906173 A1 EP 0906173A1
Authority
EP
European Patent Office
Prior art keywords
polishing
jaws
workpiece
diameter
finishing
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
EP97921768A
Other languages
German (de)
English (en)
Other versions
EP0906173B1 (fr
Inventor
Dieter Lehmann
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.)
NAXOS-UNION GmbH
Original Assignee
NAXOS-UNION SCHLEIFMITTEL- und SCHLEIFMASCHINENFABLEHMANN DIETER RIK AG
NAXOS UNION SCHLEIFMITTEL
NAXOS-UNION 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 NAXOS-UNION SCHLEIFMITTEL- und SCHLEIFMASCHINENFABLEHMANN DIETER RIK AG, NAXOS UNION SCHLEIFMITTEL, NAXOS-UNION GmbH filed Critical NAXOS-UNION SCHLEIFMITTEL- und SCHLEIFMASCHINENFABLEHMANN DIETER RIK AG
Publication of EP0906173A1 publication Critical patent/EP0906173A1/fr
Application granted granted Critical
Publication of EP0906173B1 publication Critical patent/EP0906173B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/04—Honing machines or devices; Accessories therefor designed for working external surfaces of revolution
    • 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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency

Definitions

  • the invention relates to a device for finishing cylindrical surfaces of workpieces, for example the bearing seats of crankshafts or the like, the workpiece being rotatably supported and preferably being driven at low speed, with a plurality of jaws encompassing the workpiece surface to be machined, which extend over the circumference of the workpiece surface are distributed.
  • the seats of the center bearings and pin bearings of crankshafts are subjected to a so-called custom finish in order to achieve the surface quality of the plain bearings required in mass production in the automotive industry.
  • abrasives are pressed against the finished ground seat on a flexible belt (sanding belt) or in a ceramic bonded form (finishing stone) and polished at a slow workpiece speed of, for example, 100 revolutions per minute with the addition of cooling lubricants such as petroleum or low-viscosity oils.
  • the diameter of the barrel seat decreases slightly, but the diameter tolerance specified by finish grinding remains.
  • the roundness and ripple, the spatial geometry of the seat are not changed or only slightly changed.
  • the object of the invention is therefore to enable an excellent surface quality of the workpiece surface with a simple construction of the dimensional finishing device.
  • the jaws have a high-strength polishing material on a polishing surface and act directly on the workpiece surface, and in that the inside diameter of the polishing surface corresponds to the final diameter of the workpiece surface to be achieved.
  • the ultra-hard polishing agents enable wear-free machining of the seat surface, which ensures that the ripple and roundness from pre-machining are reduced. Since the polishing jaws directly touch the workpiece, an additional sanding belt and the necessary conveying and deflecting devices can be dispensed with. Since larger oversizes can also be ground with the device according to the invention and corrections of the surface quality, roundness and ripple as well as the diameter of the bearing seat are possible, larger deviations can be accepted during the pre-processing. This means that the finish grinding process can be omitted, so that the finishing process can be carried out directly after the pre-processing by machines that work with a defined cutting edge, such as turning broaching, turning or rotary milling.
  • Polishing material a diamond, CBN, a polycrystalline
  • Corundum or silicon carbide grain or the like since these polishing materials have sufficient hardness and low Show wear and thus ensure a sufficiently long service life.
  • the effectiveness of the dimensional finishing process is further improved without the quality of the processed surface being impaired.
  • the polishing material is preferably applied to the jaws using a molding process with hardening binders.
  • a measuring sensor for in-process monitoring of the workpiece diameter is provided on at least one jaw. Due to the long service life of the polishing jaws, they can also be used as a measuring support, so that the position of the measuring polishing jaw precisely indicates the current diameter of the seat to be polished. This enables measurement-controlled polishing via the pressure to be applied to the polishing jaw, for which, according to the invention, a device is provided for controlling the finishing process in accordance with the decreasing workpiece diameter.
  • At least one jaw can be pressed against the workpiece surface by pressurization, this jaw preferably having the measuring sensor.
  • a swiveling device for Movement of the jaws provided between an open and a closed position.
  • the jaws which cannot be pressurized and accordingly have no sensor can be pivoted against a fixed stop.
  • the diameter of the workpiece still has a small allowance compared to the finished diameter before the finish machining.
  • the jaws have the final diameter to be achieved.
  • the bending cross section of the jaws is dimensioned over its support so that a resilient expansion takes place under the pressure of the polishing jaws.
  • the jaws In order to enable the jaws to lie evenly on the workpiece surface when the dimensional finishing device is closed, they are in particular movably mounted on a jaw holder via a ball support.
  • connection of the jaws to the jaw holder can take place via springs acting on the jaws, which additionally simplifies the construction of the device.
  • a finishing tool having the jaws and the measuring device is articulated in order to ensure that the holder is free from lateral force.
  • 1A is a front view of a custom finishing tool according to the invention
  • FIG. 1B is a side view of the custom finishing tool according to FIG. 1A,
  • Fig. 4 is a representation of the similar to that in Figs. 2 and 3 of a third embodiment of the invention, wherein the bearing seat is encompassed by four jaws.
  • the polishing jaws 3 are flexible in the cross section of their support and have on their polishing surface 4 facing the bearing seat 2 an ultra-hard or low-wear polishing material, such as Diamond, CBN, a polycrystalline sintered grain (corundum or silicon carbide) or the like, which was preferably applied to the polishing surface 4 of the polishing jaws 3 in the molding process, ie with hardening binders.
  • the inner diameter of the circular segment-shaped polishing surfaces 4 corresponds to the desired final diameter of the bearing seat.
  • two polishing jaws 3A are, for example, via hydraulically or pneumatically operated swiveling devices 5 between an open position which enables the workpiece 2 to be inserted and removed easily from the finishing device 1 and a closed position in which the machining takes place , pivotable.
  • a defined position of the polishing jaws 3A is determined by pivoting the polishing jaws 3A against stops 13.
  • the jaws 3 are connected in an articulated manner to a jaw holder 11 by means of a ball support 10, so that they can be adapted exactly to the contour of the bearing seat 2 when it is put on.
  • the jaws 3 are held on the jaw holder 11 by means of a spring 9 which engages on projections 8 formed on the jaws 3.
  • the bending cross section of the jaws 3 is dimensioned over its support so that they are under the contact pressure against the Bearing seat 2, which has a slightly larger diameter than the desired final diameter before the finishing process, expand and adapt to the starting diameter.
  • the finishing tool 1 is suspended via an articulated suspension 12 on the machine body of the dimensional finishing device (not shown in more detail) in order to ensure that the finishing tools 1 are supported without lateral force.
  • finishing tools 1 are arranged next to one another in a dimensional finishing device.
  • FIG. 3 shows a further embodiment of the invention, in which the workpiece 2 is only surrounded by two opposing polishing jaws 3.
  • a polishing jaw 3A is fixed or pivotable against a fixed stop, while the second polishing bake 3B can be pressurized and has the sensor 7.
  • the invention thus proposes a made-to-measure finishing device in which the ultra-hard polishing materials enable targeted machining of the workpiece surfaces. Furthermore, due to the integrated measuring control, an improvement in the diameter tolerance can be achieved, because even larger oversizes can be ground due to the stability of the coating of the polishing jaws. As a result of this, larger deviations in terms of surface quality, roundness and waviness as well as the diameter can be tolerated during the preprocessing, it is possible with the help of the dimensional finishing device according to the invention to dispense with the finish grinding process that has been customary up to now. The dimensional finishing can be used directly after the pre-processing with machines that work with a defined cutting edge, that is, turning, broaching or turning. Reference symbol list:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne un dispositif pour rectifier des surfaces cylindriques de pièces, par ex. de sièges de palier (2) de vilebrequin ou similaires. La pièce (2) est montée de façon rotative et peut être entraînée avec une faible vitesse de rotation. Ce dispositif présente une pluralité de mâchoires (3A, 3B) qui entourent les surfaces des pièces à usiner et sont réparties de façon régulière à la périphérie de la surface des pièces. L'invention vise à permettre un usage ciblé et de grande précision des surfaces des pièces avec un dispositif de rectification simple. A cet effet, les mâchoires (3A, 3B) présentent sur une surface de polissage (4) un matériau de polissage très résistant et viennent directement en contact avec la surface des pièces, et le diamètre intérieur de la surface de polissage (4) correspond au diamètre final souhaité de la surface des pièces.
EP97921768A 1996-05-16 1997-04-25 Dispositif pour rectifier des vilebrequins ou pieces similaires Expired - Lifetime EP0906173B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19619825A DE19619825A1 (de) 1996-05-16 1996-05-16 Vorrichtung zum Mikrofinishen von Kurbelwellen oder dergleichen Werkstücken
DE19619825 1996-05-16
PCT/EP1997/002134 WO1997043088A1 (fr) 1996-05-16 1997-04-25 Dispositif pour rectifier des vilebrequins ou pieces similaires

Publications (2)

Publication Number Publication Date
EP0906173A1 true EP0906173A1 (fr) 1999-04-07
EP0906173B1 EP0906173B1 (fr) 2003-09-24

Family

ID=7794516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97921768A Expired - Lifetime EP0906173B1 (fr) 1996-05-16 1997-04-25 Dispositif pour rectifier des vilebrequins ou pieces similaires

Country Status (4)

Country Link
EP (1) EP0906173B1 (fr)
DE (3) DE19619825A1 (fr)
ES (1) ES2207729T3 (fr)
WO (1) WO1997043088A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6074282A (en) * 1997-03-26 2000-06-13 Sunnen Products Company External hone and method of making and using the same
CN117086767B (zh) * 2023-10-16 2023-12-12 蓬莱三和铸造有限公司 一种半挂车配件生产用表面抛光装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2083685A (en) * 1936-07-27 1937-06-15 Ray Edgar Falkinburg Grinding or polishing device
DE3008606A1 (de) * 1980-03-06 1981-09-10 Peter 7442 Neuffen Nagel Vorrichtung zur feinbearbeitung von exzentrisch umlaufenden flaechen
DE3240332A1 (de) * 1982-10-30 1984-05-03 Ernst Thielenhaus KG, 5600 Wuppertal Verfahren und schleifmaschine zur schleifbearbeitung einer welle
DE3440350A1 (de) * 1984-11-05 1986-05-15 Maschinenbau Grieshaber GmbH, 7620 Wolfach Vorrichtung zur feinbearbeitung der lager einer kurbelwellle
DE3712101A1 (de) * 1987-04-10 1988-10-27 Techno Keramik Gmbh Honwerkzeug fuer die bearbeitung von lagerflaechen
DE3813484A1 (de) * 1988-04-21 1989-11-02 Ford Werke Ag Vorrichtung zur feinbearbeitung der hubzapfen von kurbelwellen
FR2719516B1 (fr) * 1994-05-04 1996-07-26 Procedes Machines Speciales Outillage pour le toilage de portées cylindriques avec contrôle de diamètre des portées.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9743088A1 *

Also Published As

Publication number Publication date
DE19619825A1 (de) 1997-11-20
EP0906173B1 (fr) 2003-09-24
DE59710787D1 (de) 2003-10-30
DE29610110U1 (de) 1996-08-01
ES2207729T3 (es) 2004-06-01
WO1997043088A1 (fr) 1997-11-20

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