EP2324955A1 - Maschine zum Finishen - Google Patents

Maschine zum Finishen Download PDF

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Publication number
EP2324955A1
EP2324955A1 EP10306241A EP10306241A EP2324955A1 EP 2324955 A1 EP2324955 A1 EP 2324955A1 EP 10306241 A EP10306241 A EP 10306241A EP 10306241 A EP10306241 A EP 10306241A EP 2324955 A1 EP2324955 A1 EP 2324955A1
Authority
EP
European Patent Office
Prior art keywords
abrasive belt
cassettes
machine according
abrasive
arm
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.)
Withdrawn
Application number
EP10306241A
Other languages
English (en)
French (fr)
Inventor
Edoardo Sura
Philippe Vandewiel
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP2324955A1 publication Critical patent/EP2324955A1/de
Withdrawn legal-status Critical Current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
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency

Definitions

  • the present invention generally relates to abrasive machining machines, particularly roughing and finishing, and more particularly relates to the change of tools required for machining.
  • grinding In the field of finishing and finishing of machining, it is known to remove the material by abrasion, in particular using an abrasive cloth.
  • This type of machining process known as "grinding” is, for example used for the finishing of cylindrical bearings, including crankshaft bearings intended to come in the crankcase bearings or in the bearings of connecting rods.
  • the patent application EP 0366 506 discloses a machine having, for each workpiece to be machined on a workpiece, a vertically movable swivel arm and abrasive belt application pads mounted on two jaws hinged to the arm and coupled so that they can be clamped together. one against the other.
  • the change time of the abrasive cloth or the workpiece is very long. This change requires the modification of each arm of several elements, including the abrasive tape reel, the enveloping jaws and the advance system, guiding and blocking the tape.
  • the reel of the abrasive belt and the web feed system are, in general, located outside the machining area present at the enveloping jaws.
  • the path of the abrasive cloth is complex and not very accessible. This causes a significant stoppage of the machine in order to perform the modification of the tools required either when changing the abrasive cloth, or in general, when changing the workpiece.
  • the object of the invention is therefore to overcome the drawbacks associated with the use of conventional cloth-making machines and to propose a device allowing a quick and simple change of the tools of the machine or the workpiece and thus to speed up the sequence. modifications to be made by the operator during a change of abrasive cloth or workpiece.
  • a webbing machine comprises a webbing member having two articulated webbing arms, an abrasive tape reel, two jaws adapted to clamp the abrasive web against a workpiece, and web guiding and blocking means. the abrasive belt.
  • the machine comprises two cassettes that can be detachably attached respectively to each of the hinged arms; each of the cassettes comprising a jaw support, means for guiding and blocking the abrasive belt, one of the cassettes further comprising a device for supporting the abrasive belt reel.
  • the abrasive member is intended to surround a range of a piece to be toiled by scrolling an abrasive face of a band on the scope. It comprises two symmetrical arming arms articulated between an open position and a closed position clamping the scope of the workpiece. Each of the arming arms comprises a housing for receiving each of the veiling cassettes.
  • the cassettes form a combined compact assembly mounted directly on a belt member by means of a positioning device and a rapid clamping device.
  • the operator extracts the cassettes by simple and fast disassembly and replaces them with cassettes prepared beforehand, so as to gain machine availability.
  • the clamping device may comprise a stud, a lever connected to an eccentric and a locking piece, so as to block the stud by the locking piece when the lever is lowered.
  • the positioning device of the cassette in the arm of the machine may comprise a ball and a spring; the ball being placed in a predetermined housing of the cassette, so as to accurately position the cassette in the arm of the belt.
  • the means for blocking and guiding the abrasive cloth comprise a jack, a locking pad and two guides of the abrasive cloth.
  • the jack may be pneumatic or mechanical type.
  • an abrasive belt feeding device can be mounted directly on one of the cloth cassettes.
  • the feed device of the abrasive belt may comprise a pinion capable of being driven by a worm mounted on the frame of the machine.
  • the worm can be positioned on the frame of the machine so as to come into contact with one of the gears when opening the wire arm.
  • an abutment is positioned on the frame of the sheeting machine, so as to actuate the opening of the band locking device during the opening of the sheeting arm.
  • the stop may actuate a cylinder pulling a pad so as to release the abrasive belt.
  • the support device of the coil may comprise two flexible plates ensuring the vertical positioning of said coil and the maintenance of tension of the abrasive belt.
  • the machine has a webbing member 2 and two cloth cassettes 10 and 11.
  • the two cloth cassettes can define an upper cassette 10 and a lower cassette 11.
  • the upper veiling cassette 10 comprises a jaw support 12, an upper jaw 5, means 9a for guiding and blocking the abrasive belt 8 and a device 14 for supporting the abrasive belt coil 7.
  • the lower casing 11 comprises a jaw support 13, a lower jaw 6, means 9b for guiding and blocking the abrasive belt 8.
  • the weaving member 2 is intended to surround a bearing of a workpiece 4 and comprises two symmetrical arms 3 articulating between an open position and a closed position clamping the scope of the workpiece 4. One of the arms of 3 can be held fixed and one of the arming arm 3 can be pivoted so as to tighten the reach of the piece to be clothed 4.
  • Each of the arming arm 3 comprises a housing U intended to receive each of the cloth cassettes 10 and 11.
  • the enveloping jaws 5 and 6 envelop the scope to be machined 4 when the two webbing arms 3 articulate in the closed position.
  • the abrasive belt 8 is held by the locking means 9a and 9b, the workpiece can then be rotated.
  • the cloth cassettes 10 and 11 are detachably attached respectively to each of the articulated arms 3.
  • Each cassette 10 and 11 forms a single assembly comprising a jaw support, a jaw and guide means.
  • Each assembly is mounted directly on the webbing member 2 by means of a positioning device 20 and a clamping device 15.
  • the operator extracts the cassettes 10 and 11 from the housings U and replaces them with cassettes prepared beforehand according to the piece to be clothed, which is inserted into the housings U
  • the jaws of the cassettes are adapted to the piece to be clothed, so during a change of part to be clothed, it is enough to remove the cassettes and to replace them by cassettes including the adequate jaws.
  • the operator can either extract the upper cassette 10 comprising the abrasive belt coil 7 and replace it with a cassette comprising a new abrasive belt coil 7, or extract the two cassettes 10 and 11.
  • the simultaneous extraction of the two cassettes makes the machine available more quickly.
  • the positioning device 20 comprises an abutment composed of a spring 21 and a ball 22.
  • the ball 22 is positioned in a housing (not shown ) located in the casing cassette so as to precisely position the casing cassette inside the arming arm 3.
  • the clamping device 15 comprises a stud 16, a lever 17 connected to an eccentric 18 and a locking piece 19.
  • the stud 16 is first mounted on each of the cassettes, then inserting each of the cassettes 10 and 11 in the arms 3, the stud 16 is positioned in a specially designed space inside a locking piece 19, using grooves in the arm 3.
  • the lever 17 then actuated the eccentric 18
  • the force of the eccentric 18 is applied to the locking piece 19 so as to lock the stud 16 in translation.
  • the means 9a for guiding and blocking the abrasive belt 8 comprise at least two guides 24, a jack 23 and a pad 25 that press or release the abrasive belt 8.
  • the jack 23 can be pneumatic type. Thus the cylinder 23 is actuated at the end of the machining cycle, pulling on the pad 25 to release the abrasive belt 8.
  • the means 9b for guiding and blocking the abrasive belt 8 comprise at least two guides 27, a jack 26 and a pad 28 which press or release the strip.
  • the jack 26 may be of the mechanical type.
  • a feed device 30 of the abrasive belt 8 is mounted directly on one of the cassettes.
  • This feed device 30 is composed of three pinions 31, 32, 33 held in position by a resilient means 39 of the spring type.
  • the abrasive belt. 8 is blocked by the locking means 9a and 9b. Then when the machining is finished, the abrasive belt 8 can advance thanks to the feed device 30.
  • the abrasive belt 8 is tensioned by means of a tensioning device 37 consisting of two pulleys 38, one of which is mounted on the arming arm 3 by means of a spring and the other is located on the casing cassette 10.
  • one of the pinions 32 is capable of being driven by a worm 34 mounted on the frame 36 of the machine.
  • the worm 34 is positioned on the frame 36 so as to come into contact with the pinion 32 during the opening of the weaving arm 3.
  • the weaving member 2 descends so as to actuate a stop 35 positioned on the frame 36.
  • the stop 35 in turn actuates the mechanical jack 26 of the band locking means 9b, which removes the blocking pad 28 pressed against the abrasive belt 8.
  • the worm 34 can be actuated so as to mesh with the pinion 32 and move the abrasive belt 8.
  • the clamping device 15 shown is in the unclamped position.
  • the stud 16 can be positioned in a housing of the locking piece 19. In this position, the pad 16 is free and the clothing cassette is not fixed in the arm 3 of the cloth.
  • the clamping device 15 shown is in the clamped position.
  • the lever 17 is actuated, the eccentric 18 then comes to press the locking piece 19 so as to block the head of the stud 16 in a fixed position. In this position, the pad 16 is not movable and the clothing cassette is thus fixed in the arm 3 of cloth,
  • This device 15 allows a strong, fast and compact.
  • the support device 14 of the coil 7 comprises two flexible plates 29 comprising two symmetrical hubs located in the center of each plate.
  • the flexible plates 29 are inclined towards the inside of the support device 14, so as to hold the abrasive belt coil 7.
  • the two hubs located on the flexible plates 29 are inserted in the center of the coil 7 abrasive belt.
  • the abrasive belt coil 7 is positioned vertically in the support device 14 of the coil and held by the two hubs.
  • the pneumatic cylinder 23 is actuated automatically, thus allowing the abrasive belt 8 to be released.
  • the lower arming arm 3 can then articulate downwards, allowing the lower cassette 11 to press on the abutment 35.
  • the mechanical jack 26 is actuated by means of a rod system, to release in turn the abrasive belt 8.
  • the abrasive belt 8 is provided by the feed device 30. Once the abrasive belt. 8 advanced, the lower arm 3 returns to its initial position, and the pad 28 pinches the abrasive belt 8 in the lower cassette 11.
  • the clamping device 15 When changing the abrasive belt 8 or the workpiece 4, the clamping device 15 is placed in the free position of the figure 3a , and the cassettes 10 and 11 are removed from the housings U located in the arming arms 3. New cassettes prepared beforehand are positioned accurately in each of the housing U of the arming arm 3 by the positioning device 20.
  • the ball 22 of the positioning device 20 is inserted into a housing (not shown) located in the veiling cassette, the pilot 16 is positioned, by a groove in the arming arm 3, inside the locking piece 19.
  • the lever 17 is then actuated, as shown in FIG. figure 3b , pressing against the locking piece 19 and clamp the pad 16.
  • Each of the cassettes is thus robustly maintained in each arm of the cloth 3.
  • the cloth cassettes can be prepared outside the enclosure of the machine, thus obtaining better safety and ergonomics for the operator.
  • belt grinding tape that just described also provide a reduction of tool change time and workpiece and thus a better machine availability and playability of production

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP10306241A 2009-11-24 2010-11-10 Maschine zum Finishen Withdrawn EP2324955A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0958301A FR2952845B1 (fr) 2009-11-24 2009-11-24 Machine de toilage

Publications (1)

Publication Number Publication Date
EP2324955A1 true EP2324955A1 (de) 2011-05-25

Family

ID=42288841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10306241A Withdrawn EP2324955A1 (de) 2009-11-24 2010-11-10 Maschine zum Finishen

Country Status (2)

Country Link
EP (1) EP2324955A1 (de)
FR (1) FR2952845B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124205A1 (de) * 2014-02-21 2015-08-27 Supfina Grieshaber Gmbh & Co. Kg Bandfinishvorrichtung und verfahren zur bewegungssteuerung eines finishbands
DE102016111155A1 (de) * 2016-06-17 2017-12-21 Supfina Grieshaber Gmbh & Co. Kg Finishband-Klemmeinrichtung und Finishvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366506A1 (de) 1988-09-27 1990-05-02 Societe Des Procedes Machines Speciales Zur Schleifbearbeitung von zylindrischen Lagerflächen von Werkstücken, insbesondere für die Bearbeitung von Kurbelwellen- und Kurbelzapfen mittels Bandschleifer
DE4419366A1 (de) * 1994-06-03 1995-12-07 Otmar Fahrion Finishmaschine
US5755615A (en) * 1995-11-13 1998-05-26 Toyota Jidosha Kabushiki Kaisha Lapping apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366506A1 (de) 1988-09-27 1990-05-02 Societe Des Procedes Machines Speciales Zur Schleifbearbeitung von zylindrischen Lagerflächen von Werkstücken, insbesondere für die Bearbeitung von Kurbelwellen- und Kurbelzapfen mittels Bandschleifer
DE4419366A1 (de) * 1994-06-03 1995-12-07 Otmar Fahrion Finishmaschine
US5755615A (en) * 1995-11-13 1998-05-26 Toyota Jidosha Kabushiki Kaisha Lapping apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124205A1 (de) * 2014-02-21 2015-08-27 Supfina Grieshaber Gmbh & Co. Kg Bandfinishvorrichtung und verfahren zur bewegungssteuerung eines finishbands
DE102016111155A1 (de) * 2016-06-17 2017-12-21 Supfina Grieshaber Gmbh & Co. Kg Finishband-Klemmeinrichtung und Finishvorrichtung
DE102016111155B4 (de) 2016-06-17 2024-02-29 Supfina Grieshaber Gmbh & Co. Kg Finishband-Klemmeinrichtung und Finishvorrichtung

Also Published As

Publication number Publication date
FR2952845A1 (fr) 2011-05-27
FR2952845B1 (fr) 2011-12-09

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