EP0906173B1 - Dispositif pour rectifier des vilebrequins ou pieces similaires - Google Patents

Dispositif pour rectifier des vilebrequins ou pieces similaires Download PDF

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Publication number
EP0906173B1
EP0906173B1 EP97921768A EP97921768A EP0906173B1 EP 0906173 B1 EP0906173 B1 EP 0906173B1 EP 97921768 A EP97921768 A EP 97921768A EP 97921768 A EP97921768 A EP 97921768A EP 0906173 B1 EP0906173 B1 EP 0906173B1
Authority
EP
European Patent Office
Prior art keywords
polishing
jaws
workpiece
diameter
jaw
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 - Lifetime
Application number
EP97921768A
Other languages
German (de)
English (en)
Other versions
EP0906173A1 (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 GmbH
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 GmbH, NAXOS-UNION GmbH filed Critical NAXOS UNION GmbH
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

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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
    • B24B5/36—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 dimensional finishing cylindrical Surfaces of workpieces according to the preamble of claim 1.
  • Such a device is known from DE 37 12 101 A.
  • 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 or only slightly changed.
  • EP 680 806 A1 is a tool for belt grinding cylindrical Bearing surfaces can be removed, pressing elements on the cutting movement Press the grinding belt towards the surface of a workpiece.
  • a pressure element On a carrier there is a pressure element and a U-shaped measuring head arranged.
  • idle workpiece surface deflection rollers are provided so that the measuring legs rest directly on the workpiece surface, and the Pressure elements indirectly with the interposition of the grinding belt on the Rest the workpiece surface.
  • the object of the invention is therefore to provide an excellent surface quality Workpiece surface with simple construction of the custom finishing device enable.
  • the ultra-hard polishing agents enable wear-free machining the seat surface, thereby reducing the ripple and roundness from the Pre-processing is ensured. Since the polishing jaws directly on the Grinding the workpiece can be done with an additional sanding belt and the corresponding one necessary conveyor and deflection devices are dispensed with. As with the The device according to the invention can also be ground to larger oversizes can and thereby corrections of the surface quality, roundness and ripple and the diameter of the bearing seat are possible at Larger deviations are accepted in advance.
  • the polishing material is a diamond, CBN, a polycrystalline corundum or silicon carbide grain or the like, since these polishing materials have sufficient hardness and low Have wear and thus a sufficiently long time Ensure service life.
  • the polishing material By feeding loose, fine-grained Abrasive grain, e.g. corundum, mixed with the cooling lubricant, For example, petroleum, the effectiveness of the custom finishing process further improved without the quality of the machined surface would be affected.
  • the polishing material preferably using an impression process curing binders applied to the jaws.
  • a swivel device for Moving the jaws between one opening and one Closed position provided.
  • the diameter of the workpiece has before finishing machining a small allowance compared to the finished diameter.
  • the jaws have the final diameter to be achieved on.
  • Bending cross-section of the jaws dimensioned over its support so that under the pressure of the polishing jaws a resilient expansion he follows.
  • connection of the jaws to the jaw holder can be done here via springs acting on the jaws, which build up the device additionally simplified.
  • a Bake and the finishing tool having the measuring device suspended in an articulated manner in order to secure a shear-free bracket guarantee.
  • the dimensional finishing tool 1 shown in FIGS. 1 and 2 Custom finishing device for machining cylindrical Workpieces, especially the bearing seats 2 of the middle and Pin bearing of crankshafts (in Fig. 1 A is the crankshaft shown in dashed lines), has three evenly over the Distributed polishing jaws 3 on the circumference of the bearing seat 2.
  • the polishing jaws 3 are flexible in the cross section of their support and have on their polishing surface facing the bearing seat 2 4 an ultra-hard or low-wear polishing material, such as Diamond, CBN, a polycrystalline sintered grain (or corundum Silicon carbide) or the like, which is preferably in Molding process, i.e. with hardening binders on the Polishing surface 4 of the polishing jaws 3 was applied.
  • the Inner diameter of the circular segment-shaped polishing surfaces 4 corresponds to the desired final diameter of the bearing seat.
  • Figs. 1 and 2 are two polishing jaws 3A via, for example, hydraulic or pneumatically operated swivel devices 5 between one Open position, which makes it easy to insert and remove the Allows workpiece 2 from the finishing device 1 and one
  • the closed position in which processing takes place, can be swiveled.
  • a defined position of the polishing jaws 3A determined by the polishing jaws 3A against stops 13 can be pivoted.
  • the third polishing jaw 3B is via a pressure supply line 6 can be pressurized hydraulically or pneumatically pressed against the bearing seat 2.
  • a measuring sensor 7 is arranged in the polishing jaws 3B. through which the decreasing diameter of the bearing seat 2 during the finishing process can be recorded. Not over one Control device shown can the custom finishing process controlled according to the decreasing workpiece diameter and be ended specifically.
  • the jaws 3 articulated via a ball support 10 with a jaw holder 11 connected so that they are in contact with the bearing seat 2 can be adapted exactly to its contour.
  • the bracket of the Jaws 3 on the jaw holder 11 take place via a spring 9, which engages on the projections 8 formed on the jaws 3.
  • the bending cross section of the jaws 3 is so over its support dimensioned that they press against the Bearing seat 2, the one before the custom finishing has a larger diameter than the desired final diameter, expand resiliently and to the initial diameter to adjust.
  • the finishing tool 1 is connected via an articulated suspension 12 the machine body of the finishing device, not shown suspended to ensure that the To ensure finishing tools 1.
  • Custom finishing device For simultaneous processing of all middle and pin bearing seats enable a crankshaft are in one Custom finishing device a variety of finishing tools 1 arranged side by side.
  • FIG. 3 is another embodiment of the invention shown, in which the workpiece 2 of only two opposing polishing jaws 3 is surrounded.
  • a polishing jaw 3A is fixedly arranged or against a fixed stop swiveling while the second polishing jaw 3B can be pressurized and the sensor 7 has.
  • this is Workpiece 2 out of four evenly distributed over its circumference Surround polishing jaws 3.
  • two polishing jaws 3A are fixed arranged or pivotable against a fixed stop, while the polishing jaws 3B opposite these over Pressure supply lines, not shown here, with pressure are acted upon.
  • the invention thus becomes a custom finishing device suggested by the ultra-hard polishing materials targeted machining of the workpiece surfaces possible is. Furthermore, due to the integrated measurement control Improvement in diameter tolerance achievable because the stability of the surface of the polishing jaws is also greater Allowances can be ground. As a result, at the Pre-processing larger deviations in terms of surface quality, Roundness and ripple as well as the diameter are tolerable, it is with the help of the invention Custom finishing device possible on the usual To dispense with the final grinding process. The custom finish can directly after the pre-processing with machines with defined Work cutting edge, i.e. turning, turning or rotary milling.

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  • 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)

Claims (13)

  1. Dispositif de rectification des surfaces cylindriques de pièces à usiner, par exemple des logements de palier (2) de vilebrequins ou de pièces similaires, la pièce à usiner (2) étant tourillonnée et pouvant être entraínée de préférence à une faible vitesse de rotation, avec une pluralité de mâchoires (3A, 3B) saisissant la surface de la pièce à usiner à travailler et qui sont réparties sur la circonférence de la surface de la pièce à usiner, caractérisé en ce que les mâchoires (3A, 3B) présentent sur une surface de polissage (4) un matériau de polissage très résistant et qu'elles attaquent directement la surface de la pièce à usiner (2), en ce que le diamètre intérieur de la surface de polissage (4) correspond au diamètre final à atteindre de la pièce à usiner (2) et en ce qu'il est prévu sur au moins une mâchoire (3B) un capteur de mesure (7) pour la surveillance en cours de procédé du diamètre de la pièce à usiner.
  2. Dispositif selon la revendication 1, caractérisé en ce que le matériau de polissage est un grain de diamant, de CBN, un grain fritté polycristallin, comme du grain de corindon ou de carbure de silicium, ou un matériau semblable.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le matériau de polissage est appliqué sur les mâchoires de polissage (3A, 3B) par un procédé de moulage avec des agglomérants durcissants.
  4. Dispositif selon la revendication 1, caractérisé par une installation pour la commande du processus de rectification en fonction de la diminution du diamètre de la pièce à usiner.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que deux à quatre mâchoires de polissage (3A, 3B), de préférence trois, sont disposées régulièrement sur la circonférence de la surface de la pièce à usiner.
  6. Dispositif selon la revendication 5, caractérisé en ce qu'au moins une mâchoire de polissage (3B) peut être pressée contre la surface de pièce à usiner par application de pression.
  7. Dispositif selon la revendication 1 et 6, caractérisé en ce que la mâchoire de polissage (3) sur laquelle on applique de la pression est munie du capteur de mesure (7).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé par un dispositif de pivotement (5) pour déplacer les mâchoires de polissage (3A) entre une position d'ouverture et une position de fermeture.
  9. Dispositif selon la revendication 8, caractérisé en ce que les mâchoires de polissage (3A) sur lesquelles on n'applique pas de pression peuvent pivoter contre une butée fixe.
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que les mâchoires de polissage (3A, 3B) sont flexibles sur leur support et s'adaptent au diamètre initial de la pièce à usiner (2).
  11. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que les mâchoires de polissage (3A, 3B) sont montées de façon mobile sur un support de mâchoire (11), notamment au moyen d'un support à billes (10).
  12. Dispositif selon la revendication 11, caractérisé en ce que les mâchoires de polissage (3A, 3B) sont tenues sur les supports de mâchoires (11) au moyen de ressorts (9).
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé par une suspension articulée (12) d'outils de rectification (1) présentant les mâchoires de polissage (3A, 3B) et le dispositif de mesure (7).
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 EP0906173A1 (fr) 1999-04-07
EP0906173B1 true 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 (3)

* 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
DE29819442U1 (de) 1998-10-31 1999-01-14 Nagel Maschinen- und Werkzeugfabrik GmbH, 72622 Nürtingen Vorrichtung zur Feinbearbeitung einer im wesentlichen zylindrischen Werkstückoberfläche
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.

Also Published As

Publication number Publication date
DE19619825A1 (de) 1997-11-20
DE59710787D1 (de) 2003-10-30
DE29610110U1 (de) 1996-08-01
WO1997043088A1 (fr) 1997-11-20
ES2207729T3 (es) 2004-06-01
EP0906173A1 (fr) 1999-04-07

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