EP0063966B1 - Dispositif de préhension et de transport de pièces et procédé d'ébavurage de noyaux de fonderie en sable - Google Patents

Dispositif de préhension et de transport de pièces et procédé d'ébavurage de noyaux de fonderie en sable Download PDF

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Publication number
EP0063966B1
EP0063966B1 EP82400480A EP82400480A EP0063966B1 EP 0063966 B1 EP0063966 B1 EP 0063966B1 EP 82400480 A EP82400480 A EP 82400480A EP 82400480 A EP82400480 A EP 82400480A EP 0063966 B1 EP0063966 B1 EP 0063966B1
Authority
EP
European Patent Office
Prior art keywords
cores
support
gripping
pellet member
outside
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
Application number
EP82400480A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0063966A1 (fr
Inventor
Jacques Chamdru
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 SA
Original Assignee
Regie Nationale des Usines Renault
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 Regie Nationale des Usines Renault filed Critical Regie Nationale des Usines Renault
Publication of EP0063966A1 publication Critical patent/EP0063966A1/fr
Application granted granted Critical
Publication of EP0063966B1 publication Critical patent/EP0063966B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • B66C1/46—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces by inflatable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/18—Finishing

Definitions

  • the present invention relates to a device for gripping and transporting parts, comprising, for gripping a part, at least one flexible element which can be inflated by supplying pressurized fluid and which cooperates in the inflated state by clamping effect with the part.
  • the invention also relates to a method of finishing friable parts using this device.
  • Document FR-A-2 238 662 describes a device for the spatial transport of a plurality of objects which comprises a movable support on which are slidably mounted at least two optionally removable jaws which constitute, in the close position, all or part of the periphery of the group of objects to be transferred, the support also receiving friction members of shape and distribution corresponding to those of the spaces of the group of objects in order to penetrate there freely when the support is lowered above the group of objects, means being provided for bringing the friction members into the active position, other means being provided for bringing the jaws together and apart and other means being provided for moving the support according to any desired movement.
  • the document FR-A-553 283 describes two systems of gripping members suitable for being placed on either side of an object to be handled, and such that they can grasp this object between them thanks to a suitable pressure d '' an elastic fluid acting on at least one of these systems.
  • Document DE-A-2 513 285 describes a method for deburring foundry cores in which a cutting template in the form of a blade is directed towards a core at a depth such as burrs due to the joint plane of the nucleus are eliminated.
  • the present invention relates to a device for gripping and transporting parts making it possible to simultaneously grasp several parts, even of complicated shape and / or oriented at different angles.
  • the subject of the invention is also a method of finishing friable parts using such a gripping and transport device and allowing in particular the deburring of foundry cores in sand with a view to eliminating burrs due to the plane of joint of the core box, in order to prevent the initiation of rupture on the parts cast using these cores, in particular safety parts in the automotive industry, for example suspension arms.
  • the device according to the invention for gripping and transporting parts comprises, for gripping a part, at least one pair of inflatable flexible pads mounted face to face on a common support movable relative to the part to be gripped, being inflatable l '' in the direction of the other so as to leave between them, in the non-inflated state, an interval whose width is slightly greater than the distance separating two opposite faces of the part or of a raised part of the piece, and clamping said faces together in the inflated state.
  • This device can be adapted without difficulty to the gripping of parts of any shape, by means of an appropriate conformation of the support carrying the inflatable pads.
  • Each swelling pad of the device according to the invention consists of a body of revolution made of flexible material, for example rubber or plastic, having the shape of a bucket with a substantially cylindrical external lateral surface, having an annular rim external to opposite the bottom of the bucket.
  • This patch is connected to the support by a mount having, on its face for fixing to the support, a nozzle whose external shape corresponds to the internal shape of the patch.
  • This tip is surrounded at its base by a groove with a depth slightly less than the thickness of said edge of the pellet.
  • the frame comprises a pressurized fluid supply channel opening at the free end of the end piece, opposite the bottom of the pellet fitted on said end piece.
  • the patch is thus simply fitted onto the end piece of the frame and when the mount thus fitted is fixed on the support, the edge of the patch is clamped between the frame and the support. In the event of a damaged tablet, simply detach the corresponding mount from the support and change the tablet.
  • the support has, at the place of attachment of each pellet mount, a through hole whose diameter corresponds substantially to the outside diameter of the cup-shaped body of the pellet and whose depth is equal to or slightly greater than the axial distance between the mounting face of the frame and the outside face of the bottom of the patch.
  • a through hole whose diameter corresponds substantially to the outside diameter of the cup-shaped body of the pellet and whose depth is equal to or slightly greater than the axial distance between the mounting face of the frame and the outside face of the bottom of the patch.
  • the end piece of the frame has a frusto-conical shape which widens towards its free end and that the cup-shaped body of the patch has an inner shape in a truncated cone flaring towards the bottom.
  • the latter comprises several supports capable of being fixed in an adjustable manner to a single mobile support plate.
  • the cores are advantageously gripped in the core box, inside the outside contour of the cores and / or above the burrs due to the joint plane of the box, using a device comprising as many supports with swelling pads as the box contains cores.
  • a device comprising as many supports with swelling pads as the box contains cores.
  • a plate 1 is mounted on a handling system not shown making it possible to print on the plate 1 a movement perpendicular to the plane of the drawing, as well as a displacement in the plane of the drawing.
  • the supports 2 are fixed to the plate 1 in a reciprocal arrangement chosen so as to allow the accommodation of a maximum number of parts 3 of identical shape in a given surface.
  • four of the five pieces 3 of very tormented shape are oriented at different angles in a plane parallel to the plane of the plate 1.
  • each part 3 has three parts 4 projecting upwards.
  • Each support 2 has three corresponding recesses 5 capable of receiving said projections 4 of parts 3.
  • each support 2 comprises in the present case three pairs of gripping means shown in detail in FIG. 2.
  • Each gripping means comprises a flexible inflatable pad 6, for example made of rubber or plastic, and a metal frame 7 for this pad.
  • the pad 6 is constituted by a bucket-shaped body of revolution, with a substantially cylindrical outer lateral surface, having an outer annular rim 8 opposite the bottom 9.
  • the inner lateral surface of the bucket is in the form of a truncated cone and goes in widening towards the bottom 9.
  • the mount 7 comprises, on its fixing surface 10, a projecting end piece 11, having an external shape corresponding substantially to the internal shape of the patch 6. At its base, the end piece 11 is surrounded by a groove 12 formed in the fixing surface 10, this groove 12 having a depth slightly less than the (axial) thickness of the rim 8 of the patch 6.
  • the mount 7 also comprises a channel 13 for supplying pressurized fluid extended by a channel 14 which opens at the free end of the end piece 11, opposite the bottom 9 of the patch 6 fitted onto the end piece 11 of the frame.
  • a part of the support 2 to which the frame 7 is fitted with its pad 6 has also been indicated in dashed lines.
  • the support 2 has, at the place of attachment of the frame 7, a through hole 15 of which the diameter d corresponds substantially to the outside diameter of the cup-shaped body of the patch 6.
  • the depth p of the hole 15 corresponds substantially to the distance (axial) p 'between the fixing surface 10 of the mount 7 and the face outside of the bottom 9 of the patch 6 fitted on the end piece 11.
  • Two mounts 7 with pads 6 are fixed on two opposite sides of each part of the support 2 provided with a recess 5 for a projection 4 of the part 3, as shown in FIG. 1.
  • the rim 8 of each patch 6 is clamped between the bottom of the groove 12 of the frame 7 and the surface of the support 2 to which the frame 7 is fixed.
  • the support plate 1 has on top a pneumatic distributor 16 connected by conduits 17 passing through holes in the plate 1, to connection blocks 18 each of which is fixed to one of the supports 2.
  • connection blocks 18 each of which is fixed to one of the supports 2.
  • Each block of connection 18 is connected by pipes not shown to the supply channel 13 of each of the mounts 7 fixed on each support 2.
  • a particularly advantageous use of the gripping and transport device as described above consists in the extraction of the foundry cores in sand from a core box, the different cores having complicated and / or different shapes and / or being oriented at different angles in the box.
  • these cores are intended for the casting of parts which must be free of any initiation of rupture, in particular of so-called safety parts for motor vehicles, for example of suspension arms, it is necessary to eliminate on the foundry cores, the burrs due to the joint plane of the box since these burrs would lead precisely to the formation of such incipient fractures on the cast parts.
  • the deburring assembly comprises a support plate 20 on which are fixed in an adjustable manner, by means not shown, for example screws, as many deburring blades 21 as the plate 1 of the gripping and transport device comprises supports 2 for cores 3.
  • each blade 21 is cut a recess 22 whose contour corresponds to the external contour of a core 3.
  • the reciprocal arrangement of the different blades 21 corresponds to the reciprocal arrangement of the cores 3 below the plate 1, which in turn corresponds to the reciprocal arrangement of the cores 3 in the core box.
  • the cores After having brought the cores 3 suspended from the supports 2 below the plate 1 above the deburring blades 21, the cores are lowered to make them penetrate into the blades 21.
  • the depth of penetration of the cores 3 into the blades 21 is such that the burrs formed on the cores 3 due to the plane of the joint of the box are eliminated by the blades 21.
  • the latter are advantageously mounted in an adjustable manner on the plate 1.
  • the free supports 2 having been placed on the cores in the box, the plate 1 is lowered on the box.
  • the plate is indexed on the dowel of the box and can then descend onto the supports 2 which are then fixed in their correct reciprocal position to the plate 1.
  • Each support 2 advantageously comprises several removable centering studs referenced 23 in FIG. 1.
  • the deburring blades 21 according to FIG. 3 have on their side several centering holes 24, which allows the first descent of the cores 3 on the deburring assembly, to center the blades 21 relative to the supports 2, thanks to the centering studs 23 of the latter, before fixing the blades 21 on the plate 20.
  • the studs 23 are then removed.
  • the gripping and transport device can be used for parts of all shapes. When the parts do not have protruding parts, it is possible to grip the parts at their periphery, between two opposite points each time.
  • the number of pairs of swelling pads used to grip a piece is also variable and depends, among other things, on the shape, size and fragility of the pieces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Casting Devices For Molds (AREA)
EP82400480A 1981-04-07 1982-03-16 Dispositif de préhension et de transport de pièces et procédé d'ébavurage de noyaux de fonderie en sable Expired EP0063966B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8106983 1981-04-07
FR8106983A FR2503011A1 (fr) 1981-04-07 1981-04-07 Dispositif de prehension et de transport de pieces et procede de parachevement de pieces a l'aide d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP0063966A1 EP0063966A1 (fr) 1982-11-03
EP0063966B1 true EP0063966B1 (fr) 1985-06-19

Family

ID=9257121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400480A Expired EP0063966B1 (fr) 1981-04-07 1982-03-16 Dispositif de préhension et de transport de pièces et procédé d'ébavurage de noyaux de fonderie en sable

Country Status (5)

Country Link
US (1) US4480865A (enrdf_load_stackoverflow)
EP (1) EP0063966B1 (enrdf_load_stackoverflow)
DE (1) DE3264210D1 (enrdf_load_stackoverflow)
FR (1) FR2503011A1 (enrdf_load_stackoverflow)
PL (1) PL235860A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322567C2 (de) * 1983-06-23 1985-05-23 Georg Fischer GmbH, 4020 Mettmann Einrichtung zum Entgraten von als Gießerei-Kerne oder dergleichen ausgebildeten Werkstücken
US4682806A (en) * 1985-01-02 1987-07-28 General Electric Company Quadruple gripper
DE3909102C1 (enrdf_load_stackoverflow) * 1989-03-20 1990-01-18 Adolf Hottinger Maschinenbau Gmbh, 6800 Mannheim, De
DE4002555C1 (enrdf_load_stackoverflow) * 1990-01-30 1991-05-29 Adolf Hottinger Maschinenbau Gmbh, 6800 Mannheim, De
US5000318A (en) * 1990-03-07 1991-03-19 Kupersmit Julius B Container construction for automobile bodies
CN103935764B (zh) * 2013-01-21 2017-05-03 张家港市瑞昌智能机器系统有限公司 一种抓取装置
CN104692231B (zh) * 2015-03-27 2016-08-24 宁波全力机械模具有限公司 一种大型机体主体芯的下芯吊具

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR553283A (fr) * 1921-06-27 1923-05-19 Perfectionnements apportés aux appareils de manutention, notamment à ceux à utiliser pour manutentionner des objets fragiles et de petites dimensions
DE1065593B (enrdf_load_stackoverflow) * 1956-10-01
US3056625A (en) * 1961-03-01 1962-10-02 Thomas J Timmerman Lifting device
US3161431A (en) * 1962-03-09 1964-12-15 William K Mathews Brick carrier
CH380915A (fr) * 1962-03-15 1964-08-14 Georges Lesieur & Ses Fils Soc Dispositif de préhension d'un objet mou
US3347587A (en) * 1962-07-23 1967-10-17 Frost James Dahle Article handling apparatus
FR1486737A (fr) * 1966-07-13 1967-06-30 Dansk Ind Syndikat Procédé d'introduction de noyaux dans des moules de fonderie composés d'éléments de moule identiques fabriqués successivement et installation servant à la mise en oeuvre de ce procédé
DE1266931B (de) * 1966-08-12 1968-04-25 Volkswagenwerk Ag Vorrichtung fuer die Entnahme von Kernen aus den Formkaesten von Kernschiessmaschinen
DE1710054A1 (de) * 1967-04-11 1971-09-16 Zinser Textilmaschinen Gmbh Greiforgan fuer Textilhuelsen
GB1323673A (en) * 1969-06-13 1973-07-18 Nat Res Dev Gripping
AT326844B (de) * 1972-07-27 1975-12-29 Badische Maschf Gmbh Einrichtung zum einleger von kernen in giessformen
FR2266581B1 (enrdf_load_stackoverflow) * 1973-05-03 1979-07-06 Soprec
DE2330460A1 (de) * 1973-06-15 1975-01-09 Juergen Kuenzel Vorrichtung zum halten und transportieren von beliebig geformten gegenstaenden
FR2238662A1 (en) * 1973-07-25 1975-02-21 Technifil Multiple item handling process - pair of jaws grip opposed sides of items placed in flat array
FR2277025A1 (fr) * 1974-07-03 1976-01-30 Cetec Dressler Const Etud Ther Dispositif pour la manutention de pieces
DE2513285A1 (de) * 1975-03-26 1976-10-07 Christianhemmers Horst Verfahren zum entgraten von in einer kernformmaschine o.dgl. hergestellten kernen und kernformmaschine

Also Published As

Publication number Publication date
EP0063966A1 (fr) 1982-11-03
DE3264210D1 (en) 1985-07-25
US4480865A (en) 1984-11-06
PL235860A1 (enrdf_load_stackoverflow) 1982-11-22
FR2503011A1 (fr) 1982-10-08
FR2503011B1 (enrdf_load_stackoverflow) 1984-04-27

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