EP0094875A1 - Form- und Kalibrierwerkzeug, insbesondere für Gelenkpfannen von Achszapfen von homokinetischen Gelenkkupplungen - Google Patents

Form- und Kalibrierwerkzeug, insbesondere für Gelenkpfannen von Achszapfen von homokinetischen Gelenkkupplungen Download PDF

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Publication number
EP0094875A1
EP0094875A1 EP83400954A EP83400954A EP0094875A1 EP 0094875 A1 EP0094875 A1 EP 0094875A1 EP 83400954 A EP83400954 A EP 83400954A EP 83400954 A EP83400954 A EP 83400954A EP 0094875 A1 EP0094875 A1 EP 0094875A1
Authority
EP
European Patent Office
Prior art keywords
bowl
jaws
rocket
tool body
forming
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Withdrawn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
EP83400954A
Other languages
English (en)
French (fr)
Inventor
Pierre Broutchoux
Jean Brin
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.)
Luchaire SA
Original Assignee
Luchaire 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 Luchaire SA filed Critical Luchaire SA
Publication of EP0094875A1 publication Critical patent/EP0094875A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B21J13/025—Dies with parts moving along auxiliary lateral directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
    • B21K1/765—Outer elements of coupling members

Definitions

  • the present invention relates to forming and sizing tools and, more particularly, to a forming and sizing tool used to manufacture rocket bowls for constant velocity joints.
  • CV joints There are many types of CV joints and one of them includes a first bowl-shaped part and a second part which is articulated inside the first part.
  • inside the bowl of the first par- t ie has deep grooves, in which spherical balls can roll. These grooves, six in number for example, are made in the wall of the bowl, from top to bottom, so that their bottom line is located on the same spherical surface and that the balls move along large diameters of the surface spherical.
  • the second part has, for example, the shape of a ring whose height is less than the depth of the bowl and which cooperates with the balls so as to allow it different inclinations inside the bowl.
  • rocket bowls There are different methods of making rocket bowls, but all of them include a machining and finishing phase inside the bowl, in particular grooves. This machining must be precise and therefore requires the use of high precision tools mounted on automatic machines.
  • the object of the present invention is therefore to provide a tool for forming and calibrating rocket bowls for constant velocity joints which avoids the need for a machining operation of said rocket bowls.
  • An object of the present invention is a tool for forming and calibrating rocket bowls which comprises a lower tool body designed to receive a rocket bowl in the draft state and a mobile upper tool body comprising a hollow interior volume in which slides a movable support at the lower end of which calibration jaws are fixed, said jaw support and the jaws themselves being hollow for receiving a sliding mandrel whose lower end of frustoconical shape spreads the jaws during its sliding towards the lower tool body. laughing to put them in the calibration position and lets them return to their rest position after the forming and calibration operation to allow the jaws to withdraw from the rocket bowl when the mandrel, the jaw support move away and of the upper tool body.
  • FIG. 1 is a top view of a rocket bowl 10 for constant velocity joint while FIG. 2 is a sectional view along line 2-2 of FIG. 1.
  • the right part corresponds to the rocket bowl before the forming and calibration operation according to the present invention, while the left part corresponds to the rocket bowl after said operation.
  • the rocket bowl is in the form of a hollow bowl 11 with a large opening carried by a foot 12.
  • the internal wall 13 of the bowl 11 has six grooves or grooves , the three of the right part bearing the reference 14 and the three of the left part bearing the reference 15.
  • the bottom of the bowl has a reference surface 16 for the calibration of the internal wall 13 and the opening 17 of the bowl is relatively large.
  • the rocket bowl comes mainly from a forging operation which transformed a block of metal into a rocket bowl whose internal dimensions, in particular those of the grooves and the opening, are coarse and do not match those required.
  • the grooves cannot each receive a ball which would move along a large diameter of a sphere.
  • the internal wall 13 of the rocket bowl 11 is, after having undergone certain metallurgical treatments (annealing, shot blasting, etc.), precisely machined to obtain the grooves with annealed dimensions. It should be noted that for such a machining operation, the opening 17 generally has a diameter smaller than that shown on the right-hand part of FIGS. 1 and 2.
  • the rocket bowl 11 has the shape shown on the left part of FIGS. 1 and 2.
  • the comparison between the right and left parts of said figures shows that this forming operation and calibration, new compared to what is done currently has the effect of closing the opening 17 of the bowl, ovalizing the bowl and reducing its height.
  • FIGS. 3 to 7. are each a very schematic sectional view
  • the rocket bowl 11 is placed in a support, table or lower tool body 20, its upper part projecting from the upper surface 21 of said lower tool body.
  • the formation and the calibration of the rocket bowl are obtained by the jaws 22 secured by a support 23 intended to move inside an upper tool body 24 which can itself move vertically so coming into contact with the wall of the rocket bowl 11.
  • This displacement of the tool body 24 is obtained by known means such as a press on which the upper tool body 24 is mounted.
  • the jaw support 23 is hollow to allow the passage and the vertical displacement of a mandrel 25 which has a frustoconical lower end 26 which is extended upwards by a first cylindrical part 27 of small diameter, then by a second cylindrical part 28 of larger diameter to end with an upper end 29 of cylindrical shape having a diameter greater than the previous ones.
  • the jaws 22 are six in number, as many as the rocket bowl grooves, articulated so as to be able to take, using springs 53 and 54 ( Figures 4 and 5), two different inclinations relative to the axis 30 of the different elements of the forming and calibration tool.
  • the different section views have been made according to a plane of symmetry passing through the middle of two diametrically opposite jaws 31 and 32.
  • the vertical displacement of the jaw support 23 is for example obtained pneumatically by modifying the pressure inside a chamber 33 of annular shape limited by the internal wall 34 of the upper tool body 24 and the external wall 35 of the jaw support 23. Seals 36 and 37 respectively seal the chamber 33 at the upper and lower ends of the jaw support 23.
  • the pneumatic fluid for example air, is brought into the chamber 33 through an orifice 38 passing through the wall of the body. tool 24.
  • the movement of the jaw support 23 is limited upwards by a stop constituted by the lower surface 39 of a ring 48 and downwards by a stop 40 carried by a part 62, these two stops being integral with the body of tools 24.
  • An orifice 60 drilled in the wall of the upper tool body 24 allows the air to enter and exit during the movement of the jaw support 23.
  • the vertical displacement of the mandrel 25 is obtained hydraulically by modifying the pressure inside two chambers 41 and 42 arranged on either side of the upper end 29 of the mandrel which acts as a piston, the seal between the two chambers being provided by seals 43.
  • the upper chamber 41 is limited by the internal wall 34 of the tool body 24, the upper part 44 of the piston 29 and the lower wall 45 of a circular part 53 which closes hermetically by a seal 54 the upper end of the tool body 24.
  • the lower chamber 42 is limited by the internal wall 34 of the tool body 24, the external wall 46 of the second part 28 of the mandrel 25, the lower part 47 of the piston 29 and the ring 48.
  • the tightness of this chamber 42 is provided by a seal 49 between the ring 48 and the tool body 24 and by seals 50 between the ring 48 and the mandrel 25.
  • the hydraulic fluid, oil for example is brought into the chamber upper 41 by an orifice 51 and in the lower r i eure chamber 42 through an orifice 52, two orifices passing through the wall of the tool body 24.
  • the displacement of the mandrel is limited upwards by the part 53 and downwards by a stop 56 carried by the jaw support 23.
  • the tool body 24 can move vertically to bring the jaws inside the rocket bowl ( Figures 5 and 7) and move relative to the mandrel 25 and the jaw support 23 to strike the wall of the rocket bowl ( Figure 5, left part and Figure 7) using means not shown in the figures but which are known to those skilled in the art.
  • jaws 22, as well as the internal peripheral periphery 55 of the lower end 62 of the tool body 24 have shapes suitable for obtaining a rocket bowl having the required internal surface, in particular as regards the throats.
  • FIG. 3 represents the forming and calibration tool in the rest position; in this rest position, the mandrel 25 and the jaw support 23 are in the high position and come into abutment, respectively, on the part 53 and the ring 48, this being obtained by maintaining a high pressure inside chambers 42 and 33, the chamber 41 being maintained at a lower pressure than that which prevails in the chamber 42.
  • the jaws 22 can take an inclined position relative to the axis 30.
  • the entire tool that is to say the upper tool body 24 moves downward to introduce the jaw 22 into the rocket bowl 11, l 'lower end of the jaws coming into contact with the reference surface 16 of the bottom of the rocket bowl ( Figure 5, right part).
  • the introduction of the jaws into the rocket bowl is made possible by the fact that the opening of the rocket bowl was flared during the previous forging operation.
  • the forming and calibration operation takes place by lowering the upper tool body 24 alone, the internal peripheral periphery 55 of which strikes the external wall of the rocket bowl 11 (FIG. 5, left part), which causes the forming and the calibration of the internal surface of the bowl on the jaws.
  • the pressure in the chamber 42 is allowed, while that in the chamber 41 is removed, which causes the mandrel 25 to rise; by the effect of springs 53 and 54, the jaws tend to approach the axis 30, which allows the jaws to exit through the opening of smaller diameter of the rocket bowl.
  • Pressure is also admitted into chamber 33, which has the effect of raising the jaw support 23 while helping to bring the jaws closer to the axis 30. This raising of the jaw support allows the jaws to be taken out of the rocket bowl without that he this results in a deformation of the wall of the rocket bowl, in particular of its opening.
  • the upper tool body 24 can then be raised to return to its rest position ( Figure 3, Figure 4, right part).
  • the rocket bowl After the forming and calibration operation which has just been described, the rocket bowl has the shape shown on the left-hand side of FIGS. 1 and 2 and it is not necessary to subject it to a machining operation.
  • the invention has been described using a particular embodiment but it is clear that it is not limited to this particular example and that it can be implemented for other embodiments without departing from its field.
  • the chambers 41 and 42 can be produced inside the jaw support 23 and not inside the upper part of the tool body 24.
  • the sealing of the pneumatic and hydraulic chambers can be carried out by means other than the joints described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP83400954A 1982-05-13 1983-05-11 Form- und Kalibrierwerkzeug, insbesondere für Gelenkpfannen von Achszapfen von homokinetischen Gelenkkupplungen Withdrawn EP0094875A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8208337A FR2526687B1 (fr) 1982-05-13 1982-05-13 Outil de formage et de calibrage notamment pour bols de fusees de joints homocinetiques
FR8208337 1982-05-13

Publications (1)

Publication Number Publication Date
EP0094875A1 true EP0094875A1 (de) 1983-11-23

Family

ID=9273997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400954A Withdrawn EP0094875A1 (de) 1982-05-13 1983-05-11 Form- und Kalibrierwerkzeug, insbesondere für Gelenkpfannen von Achszapfen von homokinetischen Gelenkkupplungen

Country Status (3)

Country Link
EP (1) EP0094875A1 (de)
ES (1) ES8406249A1 (de)
FR (1) FR2526687B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003655A1 (en) * 1984-02-18 1985-08-29 Pfd Limited Tool for and method of making hollow articles
GB2203076A (en) * 1987-04-10 1988-10-12 Loehr & Bromkamp Gmbh Press tooling for manufacturing constant velocity ratio universal joint members
FR2708883A1 (fr) * 1993-08-13 1995-02-17 Orain Michel Procédé et dispositif pour usiner une rainure à génératrice circulaire et directrice courbe sur une pièce mécanique.
CN102671989A (zh) * 2012-05-11 2012-09-19 成都西马汽配制造有限责任公司 一种钟形壳冲头以及钟形壳的加工工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102861848A (zh) * 2011-07-06 2013-01-09 江苏威鹰机械有限公司 球笼式万向节钟形壳冷锻成型凹模
CN110722085A (zh) * 2019-11-05 2020-01-24 如皋市大生线路器材有限公司 一种球窝坯料用成型模具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013545A1 (de) * 1978-11-29 1980-07-23 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Schmiedegesenk und mit dem Schmiedegesenk hergestellter Formling
JPS55141347A (en) * 1979-04-24 1980-11-05 Mitsubishi Heavy Ind Ltd Working method of outer race of universal joint
DE2830275B2 (de) * 1978-07-10 1980-11-13 Volkswagenwerk Ag, 3180 Wolfsburg Preßwerkzeug zur Herstellung einer Innenkontur eines vorgeformten Werkstücks
JPS5659556A (en) * 1979-10-18 1981-05-23 Komatsu Ltd Forging method of parts having undercut
FR2474909A1 (fr) * 1980-02-05 1981-08-07 Rudolf Liebergeld Procede et outil pour la fabrication d'un corps creux massif metallique comportant des evidements interieurs en contre-depouille

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2830275B2 (de) * 1978-07-10 1980-11-13 Volkswagenwerk Ag, 3180 Wolfsburg Preßwerkzeug zur Herstellung einer Innenkontur eines vorgeformten Werkstücks
EP0013545A1 (de) * 1978-11-29 1980-07-23 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Schmiedegesenk und mit dem Schmiedegesenk hergestellter Formling
JPS55141347A (en) * 1979-04-24 1980-11-05 Mitsubishi Heavy Ind Ltd Working method of outer race of universal joint
JPS5659556A (en) * 1979-10-18 1981-05-23 Komatsu Ltd Forging method of parts having undercut
FR2474909A1 (fr) * 1980-02-05 1981-08-07 Rudolf Liebergeld Procede et outil pour la fabrication d'un corps creux massif metallique comportant des evidements interieurs en contre-depouille

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003655A1 (en) * 1984-02-18 1985-08-29 Pfd Limited Tool for and method of making hollow articles
EP0153810A1 (de) * 1984-02-18 1985-09-04 Pfd Limited Werkzeug und Verfahren zur Herstellung hohler Gegenstände
GB2183187A (en) * 1984-02-18 1987-06-03 Pfd Ltd Tool for and method of making hollow articles
GB2203076A (en) * 1987-04-10 1988-10-12 Loehr & Bromkamp Gmbh Press tooling for manufacturing constant velocity ratio universal joint members
GB2203076B (en) * 1987-04-10 1991-06-05 Loehr & Bromkamp Gmbh Press tooling for manufacturing constant velocity ratio universal joint members
FR2708883A1 (fr) * 1993-08-13 1995-02-17 Orain Michel Procédé et dispositif pour usiner une rainure à génératrice circulaire et directrice courbe sur une pièce mécanique.
CN102671989A (zh) * 2012-05-11 2012-09-19 成都西马汽配制造有限责任公司 一种钟形壳冲头以及钟形壳的加工工艺
CN102671989B (zh) * 2012-05-11 2015-03-11 成都西马汽配制造有限责任公司 一种钟形壳冲头以及钟形壳的加工工艺

Also Published As

Publication number Publication date
ES522343A0 (es) 1984-08-01
FR2526687A1 (fr) 1983-11-18
FR2526687B1 (fr) 1985-08-30
ES8406249A1 (es) 1984-08-01

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Inventor name: BROUTCHOUX, PIERRE

Inventor name: BRIN, JEAN