EP0669188A1 - Vorrichtung zum Zentrieren und Blockieren eines Werkstückes zwecks dessen Honen mittels eines aufweitbaren Honwerkzeuges - Google Patents

Vorrichtung zum Zentrieren und Blockieren eines Werkstückes zwecks dessen Honen mittels eines aufweitbaren Honwerkzeuges Download PDF

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Publication number
EP0669188A1
EP0669188A1 EP95400391A EP95400391A EP0669188A1 EP 0669188 A1 EP0669188 A1 EP 0669188A1 EP 95400391 A EP95400391 A EP 95400391A EP 95400391 A EP95400391 A EP 95400391A EP 0669188 A1 EP0669188 A1 EP 0669188A1
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EP
European Patent Office
Prior art keywords
piston
lapping
support
fluid
pinion
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
EP95400391A
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English (en)
French (fr)
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EP0669188B1 (de
Inventor
Jean-Claude Pineau
Richard Bonachera
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.)
Procedes Machines Speciales S P M S Ste
Original Assignee
Procedes Machines Speciales S P M S Ste
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 Procedes Machines Speciales S P M S Ste filed Critical Procedes Machines Speciales S P M S Ste
Publication of EP0669188A1 publication Critical patent/EP0669188A1/de
Application granted granted Critical
Publication of EP0669188B1 publication Critical patent/EP0669188B1/de
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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • 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
    • B24B33/10—Accessories

Definitions

  • the present invention relates to a device for centering and clamping a workpiece with a view to running it in using an expansion lapper, comprising a support by which the workpiece to be lapped is applied against a fixed stop, and a set of two fluid pistons acting on said support.
  • Another known centering and clamping device specially designed for lapping pinions comprises a fixed stop against which the pinion to be lapped is applied directly by a support on which acts a set of concentric fluid pistons.
  • This assembly comprises a first fluid piston having a large stroke relative to its cylinder, and a second fluid piston interposed between the support and the first piston and having a reduced stroke relative to this latest.
  • the stroke of the first piston is fixed and is chosen so that when the first piston is at the bottom of the travel direction in the advance direction and the second piston at the bottom of the travel in the backward direction, there remains between the pinion and the support and / or the fixed stop, a slight play less than the stroke of the second piston.
  • the pinion being angularly immobilized by an anti-rotation system, then the rod lapped in rotation is engaged in the pinion and the rod is expanded until the establishment of a predetermined braking torque between the rod and the pinion, indicating that, the abrasive stones of the lapping being in contact with the bore of the pinion, the latter is centered relative to the lapping.
  • the second piston is then fed in the direction of advance so that the pinion thus centered is clamped by the support against the fixed stop, for its running-in.
  • This known device while offering advantages compared to the cassette device (fewer wear parts, possibility of making the pinion-bearing and pinion-abutment contact surfaces coincide with reference surfaces recessed on the pinion), nevertheless has the disadvantage that the stroke of the first piston is fixed and predetermined, so that each time a pinion having an axial thickness given to a pinion having another axial thickness, it is necessary to also change the stopper replace it with a stop having a complementary axial dimension.
  • the present invention relates to a device for centering and clamping a part with a view to lapping it using an expansion lapping device, a device which, while being of simple structure, can be used without modification for the lapping of parts with different axial thicknesses.
  • the first piston therefore has a stroke which is independent of the axial thickness of the part to be lapped, so that the device can be used interchangeably for clamping parts having different axial thicknesses.
  • the first piston performs a stroke in the direction of advance which is automatically adapted to the axial thickness of the part to be lapped and is then locked in its position until the end of lapping.
  • the second piston performs a predetermined fixed stroke which is independent of the axial thickness of the part to be lapped.
  • step (e) it is possible, following step (e), to f) supply the first piston with fluid in the direction of advance and remove the blocking of the first piston by its blocking element, until the end of the running-in operation of the part.
  • step c) the supply of fluid to the second piston in the reverse direction according to step c) is effected through the first piston, in which case step c) also includes the supply of fluid to the first piston in the reverse direction.
  • blocking element can be used to block the first piston in its cylinder, it is advantageous for this blocking element to be constituted by a fluid tightening sleeve, of a type known per se.
  • a pinion 1 whose bore must be run in is brought by means not shown, on a support surface 2, below a stop 3 installed in a fixed position, at a distance above the surface 2 , on a support 3a.
  • the support 3a and the stop 3 are traversed by a through hole for the introduction, from the top, of an expansion lapping 4 into the bore of the pinion 1.
  • This device comprises a cylinder 6 in which is vertically movable back and forth a first piston 7 serving itself guide to a second piston 8 extended upwards by a rod 8a which carries, by means of a swivel bearing 9, a support piece 10 for the pinion 1 to be lapped.
  • the support piece 10 which is hollowed out in its upper part to be able to receive the lower end of the lapping 4 is movable, under the action of the two pistons 7 and 8, in a hole 11 in the support surface 2, for lifting and clamp the pinion 1 against the stopper 3.
  • a fluid clamping sleeve 12 is fixed in the cylinder 6, around a rod 7a which extends the piston 7 downwards beyond the cylinder 6 at its lower part.
  • the first piston 7 can be supplied with pressurized fluid in the direction of advance, on its lower face by a connector 13 and in the reverse direction on its upper face by a connector 14 on the cylinder 6.
  • the second piston 8 can be supplied with pressurized fluid in the direction of advance, on its lower face by a connector 15 provided on the rod 7a and in the reverse direction on its upper face by a passage 16 formed in the piston 7 and communicating with the connector supply 14 of the latter.
  • the clamping sleeve 12 can be supplied with fluid by a fitting 17 on the cylinder 6.
  • the support 3a carries a finger 18 projecting downwards to serve as an anti-rotation element for the pinion 1, as described in more detail below.
  • the various fluid elements of the device 5 are supplied, by a command, as described below.
  • the pressurized connections 13 and 15 are supplied with pressurized fluid to move the two pistons 7 and 8 in the direction of advance (upwards), namely the piston 8 at the bottom of the travel in the direction of advance and the piston 7 in the direction of advance until the pinion 1 is clamped by the support piece 10 against the stopper 3.
  • the finger 18 of the support 3a of the stopper 3 automatically engages with teeth of pinion 1 and prevents rotation of the latter.
  • the clamping sleeve 12 is supplied with pressurized fluid through its connector 17, so that the sleeve 12 blocks the rod 7a of the piston 8 in its position relative to the cylinder 6.
  • a third step the supply of pressurized fluid to the first piston 7 and to the second piston 8 is reversed, by putting pressurized the connection 15 and pressurized the connection 14 and, consequently, the passage 16 which communicates with the connection 14.
  • the first piston 7 blocked by the clamping sleeve 12 does not change position, while the second piston 8 is is thus brought to the bottom of the travel in the reverse direction (down).
  • the support piece 10 descends from the value of the stroke of the second piston 8 and thus debrides the pinion 1 while maintaining it in engagement with the finger 18.
  • the expansion lapping 4 is introduced from the top, through the support 3a and the stop 3, into the bore of the pinion 1 and, while driving the lapping in rotation, the latter is made to expand so that its lapping stones come into contact with the bore of the pinion 1 to be lapped.
  • This expansion continues until a predetermined torque is measured, by a torque detector, between the lapping 4 and the pinion 1 angularly immobilized by the finger 18. The detection of this torque is the sign that the pinion 1 is is perfectly centered on the lap.
  • a fifth step the supply of the second piston 8 is again reversed, by pressurizing its connector 15, so that the piston 8 is brought back to the end of travel in the direction of advance (upwards). and re-clamps against the stop 3 the pinion 1 previously centered by the lapping 4.
  • the actual lapping of the pinion 1 can then be carried out by the lapping 4, the device 5 remaining in the same position.
  • the stroke of the second piston 8 can be very short (of the order of 0.5 mm) since this piston has the sole function of allowing, after clamping the pinion, an unclamping of the pinion with a view to centering the latter by the lapping 4 and then re-clamping the pinion after centering by the lapping 4.
  • the first piston 7 must on the other hand have a sufficient stroke to allow the clamping, against the same fixed stop 3, of all the pinions 1 to be run in, that is to say compensation for the differences in axial thickness that these pinions 1 may have between their two opposite reference surfaces coming into contact one with the fixed stop 3 and the other with the movable support piece 10 of the device 5.
  • the anti-rotation finger 18 is a fixed, uncontrolled part, which is not stressed during the actual running-in, the pinion then being immobilized angularly by its blocking against the stop 3.
  • the hydraulic control 19 of the device 5 comprises three sub-assemblies 20, 21 and 22.
  • the hydraulic control 19 of the device 5 is completed by an electronic control 23 which controls the progress of the sequences as described above, by making use of a measurement of the torque on the lapping 4 (detector element 24) to define the end of the pinion centering cycle 1.
  • This torque measurement can be done, for example, by measuring the current absorbed by the electric motor for driving the lapping, or in any other manner known per se.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP95400391A 1994-02-28 1995-02-24 Vorrichtung zum Zentrieren und Blockieren eines Werkstückes zwecks dessen Honen mittels eines aufweitbaren Honwerkzeuges Expired - Lifetime EP0669188B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402256 1994-02-28
FR9402256A FR2716640B1 (fr) 1994-02-28 1994-02-28 Dispositif de centrage et de blocage d'une pièce en vue de son rodage à l'aide d'un rodoir à expansion.

Publications (2)

Publication Number Publication Date
EP0669188A1 true EP0669188A1 (de) 1995-08-30
EP0669188B1 EP0669188B1 (de) 1999-01-13

Family

ID=9460488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400391A Expired - Lifetime EP0669188B1 (de) 1994-02-28 1995-02-24 Vorrichtung zum Zentrieren und Blockieren eines Werkstückes zwecks dessen Honen mittels eines aufweitbaren Honwerkzeuges

Country Status (5)

Country Link
US (1) US5667425A (de)
EP (1) EP0669188B1 (de)
DE (1) DE69507173T2 (de)
ES (1) ES2125568T3 (de)
FR (1) FR2716640B1 (de)

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DE2903622A1 (de) * 1979-01-31 1980-08-14 Gehring Gmbh Maschf Vorrichtung zum halten von werkstuecken, insbesondere zahnraedern
FR2508366A1 (fr) * 1981-06-26 1982-12-31 Gehring Gmbh Maschf Dispositif de fixation de pieces
FR2541613A1 (fr) * 1983-02-25 1984-08-31 Gehring Gmbh Maschf Dispositif pour tenir des pieces a usiner, notamment des roues dentees aux fins de glacage de l'alesage axial central

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US3029562A (en) * 1959-08-12 1962-04-17 Emerson Electric Mfg Co Stator bore honing machine and method of honing
US3552069A (en) * 1967-08-04 1971-01-05 Nat Automatic Tool Co Floating seat structure for honing machines and the like
DE2903622A1 (de) * 1979-01-31 1980-08-14 Gehring Gmbh Maschf Vorrichtung zum halten von werkstuecken, insbesondere zahnraedern
FR2508366A1 (fr) * 1981-06-26 1982-12-31 Gehring Gmbh Maschf Dispositif de fixation de pieces
FR2541613A1 (fr) * 1983-02-25 1984-08-31 Gehring Gmbh Maschf Dispositif pour tenir des pieces a usiner, notamment des roues dentees aux fins de glacage de l'alesage axial central

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110281150A (zh) * 2019-07-31 2019-09-27 沈阳建筑大学 一种用于陶瓷轴承套圈内沟道装夹工具的活塞式动力装置

Also Published As

Publication number Publication date
FR2716640B1 (fr) 1996-05-03
FR2716640A1 (fr) 1995-09-01
DE69507173T2 (de) 1999-09-16
EP0669188B1 (de) 1999-01-13
US5667425A (en) 1997-09-16
DE69507173D1 (de) 1999-02-25
ES2125568T3 (es) 1999-03-01

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