EP0318353B1 - Kurbelwellenzapfenfeinschleifanordnung - Google Patents

Kurbelwellenzapfenfeinschleifanordnung Download PDF

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Publication number
EP0318353B1
EP0318353B1 EP19880402860 EP88402860A EP0318353B1 EP 0318353 B1 EP0318353 B1 EP 0318353B1 EP 19880402860 EP19880402860 EP 19880402860 EP 88402860 A EP88402860 A EP 88402860A EP 0318353 B1 EP0318353 B1 EP 0318353B1
Authority
EP
European Patent Office
Prior art keywords
shell
crankshaft
shells
unit according
rectification unit
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
EP19880402860
Other languages
English (en)
French (fr)
Other versions
EP0318353A1 (de
Inventor
Paul Favrot
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0318353A1 publication Critical patent/EP0318353A1/de
Application granted granted Critical
Publication of EP0318353B1 publication Critical patent/EP0318353B1/de
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
    • 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

Definitions

  • crankpin grinding machine which allows large-scale machining of parts with different bearing diameters.
  • several solutions have been proposed but they all lead to complicated mechanics, therefore unreliable, and lead to a decrease in rigidity and therefore in precision. For all these reasons they are only very little used in large automobile series where it is preferred to interpose, between the bearings of the crankshafts and the workpiece heads of the grinding machine, shells which are changed manually when modifying the type of crankshaft, which leads to campaigns whose duration is at least a few hours.
  • the present invention relates to a rectification assembly which allows, on the contrary, to machine in a random distribution, crankshafts which have not even between bearings and crankpins and same crankpin width but whose strokes and bearing diameters are different .
  • shells are used with each crankshaft such that, on the one hand, they blend with the diameter of the bearings, and on the other hand, they position the axis of the crank pin (s) on the machine. to be substantially corrected on the axis of rotation of the workpiece heads.
  • the grinding assembly includes a grinding machine 1 comprising a frame 2, a table 3 and two workpiece heads 4 fixed on the table 3. In each of these heads is mounted rotationally a spindle 5 secured a mounting element 6; the two pins are connected to a drive motor not shown by means of a common drive shaft 7 and sets of gears 8 and 9.
  • the assembly also includes a gantry 12 for loading and unloading the crankshafts 11 from a conveyor 13 to the grinding machine 1.
  • This gantry comprises a beam 14 which rests on feet 15 and on which a handling trolley can move 16 provided with two clamps 17 and two supports 18.
  • the assembly includes a support 19 on which are fixed bearings 20 for an axis 21 integral with two loading arms 22 and with respect to which a magazine 23 for shells 10 can move in the direction of the arrow f-f ′.
  • a motor 24 makes it possible to pivot the axis 21, therefore the arms 22.
  • crankshafts which have not even a between bearings and crankpins and same width b of crankpins, but the other dimensions of which, in particular the half-stroke c , can vary by a few millimeters.
  • the magazine 23 contains four shells per type of crankshaft programmed, the homologous shells being spaced by the distance e between the two arms 22.
  • each shell 10 can be fixed to one of the bearings 11 a of a crankshaft 11 by a dog 25 pivotally mounted at 26 relative to the shell.
  • This has a well 27 on the bottom of which is supported by a helical spring 28 pressing, by means of a pusher 29, on a beak 30 of the dog 25 and thus tending to maintain the latter in the closed position.
  • the shell carries a stop 31 which ensures the correct angular orientation of the shell relative to the crankshaft.
  • each loading arm 22 is integral with a double-acting hydraulic cylinder 32, the chambers of which can be brought into communication with a source of hydraulic pressure by holes 33 and 34.
  • the piston 35 of this cylinder can, when arm 22 occupies the position of Figure 4, engage in the well 27 and push the spout 30 against the action of the spring 28 to open the dog 25 and release the shell 10 from the crankshaft.
  • the arm 22 is also provided with a pin 36 suitable for engaging in a bore 37 of the shell perpendicular to the axis of the well 27.
  • each shell 10 has two bearing faces 10 a by which it can rest in a recess in one of the mounting elements 6.
  • rollers 41 supported in the mounting element 6. there is provided a roller 42 whose axis is integral with the jaw and a roller 43 which can be interposed between the roller 42 and a sleeve 44 carried by the fixing element 6.
  • the axis of this roller 43 is carried by a piston 45 which is movable in a chamber 46 of the mounting element 6.
  • a liquid under pressure can be admitted into the chamber 46 by holes 47 and 48 opening on either side of the piston 45.
  • the jaw arrives in the clamping position, it is positioned in front of the dog 25 by a stop screw 49 applied against the mounting element by a spring 50 tending to rotate the jaw relative to the mounting element.
  • a piston 51 movable in a chamber 52 of the mounting element can be applied against the jaw 38 by admitting a pressurized liquid into the chamber 52 by a bore 53, to loosen the jaw.
  • the rectification assembly which has just been described operates in the following manner.
  • the gantry 12 takes a raw crankshaft on the conveyor 13 at A, raises it at B, and translates to bring it to C where the two arms 22 load it with two shells 10 taken from the magazine 23.
  • the gap e between the arms 22 is equal to a in the case of the rectification of the central pins 11 b and to 3 a in the case of the extreme pins.
  • the arms 22 being at rest, as indicated in solid lines in Figure 3, come to take the desired shells in the magazine 23; the piston 35 is then brought into the extended position so as to open the hammer 25 and secure the shell with the arm, the force reaction of the piston 35 being absorbed by the pin 36 ( Figure 4). Then the arms continuing to move deposit the shells on the bearings 11b of the crankshaft; the pistons 35 are brought into position retracted so that the jaws 25 secure the shells to the crankshaft ( Figure 5).
  • crankshaft with its two shells is then translated into D, then loaded into E on the grinding machine 1.
  • the latter is thus fixed, by its shells 10, on the mounting elements 6 and its crank pins 11 b which are then coaxial with the pins 5 can be corrected.
  • the crankshaft After rectification, the crankshaft follows a reverse path. It is first released from the mounting elements 6 by admitting fluid through the holes 48 and 53, then brought back to D and C; in this position, it is released from its shells by admitting fluid into the jacks 32 through the holes 33, so that the pistons 35 push back the beaks 30 of the dogs 25. The shells 10 released are brought back into the magazine 23 by the arms 22 while the crankshaft returns to the conveyor 13 to be evacuated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (7)

1. Kurbelwellenzapfenfeinschleifanordnung für Kurbelwellen mit gleichen Abständen zwischen Lagern und Zapfen und gleicher Breite der Zapfen, welche umfaßt:
- eine mit zwei Werkstückspindelstöcken (4) ausgerüstete Schleifmaschine (1), von denen jeder mit einem Werkstück-Einspannelement (6) versehen ist, das in Drehung versetzt wird und Befestigungsmittel für eine Lagerschale (10) aufweist, an der das eine der Lager (11a) einer zu bearbeitenden Kurbelwelle festgelegt ist dergestalt, daß diese sich um die Achse ihrer Zapfen dreht,
- eine Werkstück-Zuführeinrichtung (13),
- und eine Brücke (12) zur Zuführung und Entnahme der Kurbelwellen (11), dadurch gekennzeichnet, daß sie außerdem eine Einrichtung zum Zuführen und Entnehmen der Lagerschalen (10) beinhaltet, welche ein Auflager (19) für Arme (22) zum Zuführen und Entnehmen der Lagerschalen (10) und ein Lagerschalen-Magazin (23) umfaßt, das in bezug auf das Auflager verschieblich und geeignet ist, den Armen die passenden Lagerschalen (10) zuzuführen, und dadurch, daß die Lagerschalen (10) mit Mitteln zur Fixierung auf der Kurbelwelle ausgerüstet sind, die unabhängig von den Werkstück-Einspannelementen (6) sind.
2. Feinschleifanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Einrichtung zur Festlegung der Lagerschalen (10) auf der Kurbelwelle (11) für jede Lagerschale eine Spannzange (25) enthält, die schwenkbar an der Lagerschale (10) angebracht und der Einwirkung einer Feder (28) ausgesetzt ist, die sie in Schließstellung zu halten sucht.
3. Feinschleifanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Feder (28) in einer Bohrung (27) der Lagerschale (10) angeordnet ist.
4. Feinschleifanordnung nach Anspruch 3, dadurch gekennzeichnet, daß jeder Arm (22) einen hydraulischen Kolben (35) trägt, der geeignet ist, in die Bohrung (27) einzugreifen und die Spannzange in ihre Offenstellung entgegen der Kraft der Feder (28) zu bringen.
5. Feinschleifanordnung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß jeder Arm (22) mit einem Stein (36) versehen ist, der geeignet ist, in eine Bohrung (37) der Lagerschale einzugreifen, die senkrecht zur Achse der Bohrung (27) angeordnet ist.
6. Feinschleifanordnung nach einem der ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Einrichtung zur Verbindung einer Lagerschale (10) mit einem Einspannelement (6) eine Spannbacke (38), die an dem Spannelement schwenkbar angebracht ist, und eine Einrichtung aufweist, um die Spannbacke auf die Lagerschale (10) oder einen Bestandteil davon zu drücken, beispielsweise auf die Spannzange (25), mit der sie versehen ist.
7. Feinschleifanordnung nach Anspruch 6, gekennzeichnet durch einen hydraulischen Kolben (51), um die Spannbacke (38) zu schwenken und sie in die Freigabestellung zu führen.
EP19880402860 1987-11-26 1988-11-15 Kurbelwellenzapfenfeinschleifanordnung Expired - Lifetime EP0318353B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8716828A FR2623741B1 (fr) 1987-11-26 1987-11-26 Ensemble de rectification des manetons de vilebrequins
FR8716828 1987-11-26

Publications (2)

Publication Number Publication Date
EP0318353A1 EP0318353A1 (de) 1989-05-31
EP0318353B1 true EP0318353B1 (de) 1991-05-22

Family

ID=9357455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880402860 Expired - Lifetime EP0318353B1 (de) 1987-11-26 1988-11-15 Kurbelwellenzapfenfeinschleifanordnung

Country Status (3)

Country Link
EP (1) EP0318353B1 (de)
DE (1) DE3862926D1 (de)
FR (1) FR2623741B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664192B1 (fr) * 1990-07-09 1992-10-02 Peugeot Machine a rectifier des manetons de vilebrequin.
GB9608351D0 (en) * 1996-04-23 1996-06-26 Western Atlas Uk Ltd Composite component grinding method and apparatus
DE102016116161A1 (de) * 2016-08-30 2018-03-01 Supfina Grieshaber Gmbh & Co. Kg Werkzeugmaschine und Verfahren zur finishenden Bearbeitung von Werkstücken
CN108581702A (zh) * 2018-05-31 2018-09-28 上汽大众汽车有限公司 曲柄连杆颈去毛刺机构
CN112025433B (zh) * 2020-09-22 2024-08-16 江苏罡阳股份有限公司 一种整体式曲轴曲拐磨削自动定位夹具
CN112872439B (zh) * 2021-01-18 2022-06-10 山西东鑫衡隆机械制造股份有限公司 一种汽车曲轴加工用铣孔装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780895A (en) * 1954-06-04 1957-02-12 Norton Co Crankpin grinding machine
DE2104904C3 (de) * 1971-02-03 1974-04-11 Werkzeugmaschinenfabrik Gildemeister & Co Ag, 4800 Bielefeld Spannvorrichtung für Drehmaschinen u.dgl. Werkzeugmaschinen mit Schnellwechsel der Aufsatzspannbacken
US4003721A (en) * 1976-04-26 1977-01-18 Landis Tool Company Cylindrical grinder

Also Published As

Publication number Publication date
DE3862926D1 (de) 1991-06-27
FR2623741A1 (fr) 1989-06-02
EP0318353A1 (de) 1989-05-31
FR2623741B1 (fr) 1990-04-27

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