EP0534818B1 - Verfahren zum Herstellen einer Achse mit profilierten Enden, Maschine zur Durchfuhrung des Verfahrens und damit hergestellte Achse - Google Patents

Verfahren zum Herstellen einer Achse mit profilierten Enden, Maschine zur Durchfuhrung des Verfahrens und damit hergestellte Achse Download PDF

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Publication number
EP0534818B1
EP0534818B1 EP19920402493 EP92402493A EP0534818B1 EP 0534818 B1 EP0534818 B1 EP 0534818B1 EP 19920402493 EP19920402493 EP 19920402493 EP 92402493 A EP92402493 A EP 92402493A EP 0534818 B1 EP0534818 B1 EP 0534818B1
Authority
EP
European Patent Office
Prior art keywords
pin
axial passage
profiled
bore
blank
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
EP19920402493
Other languages
English (en)
French (fr)
Other versions
EP0534818A1 (de
Inventor
Claude Bellido
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.)
Perfect Circle Europe SA
Original Assignee
Floquet Monopole SRL
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 Floquet Monopole SRL filed Critical Floquet Monopole SRL
Publication of EP0534818A1 publication Critical patent/EP0534818A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21K1/06—Making machine elements axles or shafts
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/08—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles

Definitions

  • the present invention relates to a method for manufacturing an axis with profiled axial passage ends, a machine for implementing the method, as well as the axes thus obtained. It is understood that these are axes whose axial passage of revolution has at its ends a widening with a particular profile, these axes being obtained starting from a blank in the form of a tube whose said axial passage is cylindrical (see for example US-A-3034840).
  • Such axes are used in particular to ensure the connection between a connecting rod end and an internal combustion engine piston, these axes being subjected to significant bending and ovalization forces which, due to their mounting between the bosses of the piston, are not evenly distributed.
  • the zones between the end parts of the axial passage are subjected to the greatest bending and ovalization forces and must be relatively thick.
  • the conical widening (or of any other profiled shape) of the ends of the axial passage makes it possible to avoid an excess of material in the least stressed areas, that is to say at the level of the piston bosses.
  • the object of the invention is to remedy this, and for this purpose a method of the general type defined at the start will be characterized in that it consists essentially in maintaining said axis in a sliding die, in engaging one of the ends of said axial passage of the axis on a counter-punch, in engaging a movable punch in the other end of said axial passage , and to exert on this movable punch, the axis then being in abutment on the counter-punch, a force capable of imparting by stamping, at the two ends of said axial passage, the desired profiled deformation.
  • the axis or axis blank will not be rigidly held by it other than laterally, and that it will be axially blocked only by the counter-punch.
  • the forces that the two punches will exert on the respective ends of the axis will therefore be exactly equal, which will make it possible to obtain precisely, by this stamping, the desired profiled internal deformation, without favoring one end of the axis relative to the 'other.
  • the first operation could advantageously consist in making a tube by forging.
  • the invention also relates to a machine according to the preamble of claim 2 for the implementation of such a method (see for example US-A-3034840).
  • the roughing section of axis 1 of FIG. 1 is a hollow cylinder of revolution with constant wall thickness.
  • the axis 2 that the invention aims to obtain is shown in Figure 2; the axial passage 3 of the blank 1 has been widened at its ends by stamping, in 2 a and 2 b , according to conical surfaces (in FIG. 8, it is a rounded surface 2 c ).
  • the axial passage remains as is only in the central part.
  • axis 2 can be mounted so as to ensure the connection between a foot connecting rod 6 and the bosses 5 of a piston 4, in a known manner. We see that there is a reduction in thickness of the axis 2 only in the least working parts, at the level of the bosses 5 of the piston, and a normal thickness in the center.
  • the counter-punch has been referenced 7b . It comprises at its base a head 12 b normally resting on a table 14, which comprises a bore 15 in which an ejector 16 can slide.
  • the movable punch has been shown at 7 a , in the axis of the previous one. These punches each have a point, respectively 10 b and 10 a , and a profiled shoulder, in this case conical (working part), respectively 13 b and 13 a .
  • the machine also comprises a fixed support 17 resting on a base 18 fixed on the table 14, and in which support is mounted a sliding die 8 consisting of two coaxial parts 8 a and 8 b secured by conical fitting. This matrix rests on studs 19 which are elastically biased upwards by helical springs 20 held in cylindrical housings 21 of the base 18. The sliding of the matrix 8 upwards is limited by shoulders 22.
  • the central part 8b of the matrix is interchangeable, so that one can block in its central bore 23, oriented in the direction of sliding, blanks 1 of different diameters. (The end of the counter-punch 7b is engaged in the bore 23).
  • the movable punch 7 a When the axis blank 1 is in place in the sliding die 8, the movable punch 7 a is lowered by a hydraulic cylinder or the like so that its tip 10 a engages at the end in the axial passage 3 of the blank 1, the tip 10b of the counter-punch 7b then being engaged in the other end of this passage (see Figures 4 and 5).
  • the pressurization of the jack causes the desired deformations 2 a and 2 b with a perfect balancing of the forces exerted by the conical shoulders 13 b and 13 a on the blank, since the die 8 can slide slightly downwards by compressing the springs 20 ( Figure 6). Indeed, the pressure exerted by the conical shoulders of the punches on the blank 1 causes the latter to block in the bore 23 of the matrix, and it is therefore the friction forces which cause the latter to descend.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Claims (7)

  1. Verfahren zur Herstellung einer Achse mit profilierten Enden eines axialen Durchgangs, und zwar deren axialer Rotationsdurchgang an seinen Enden eine Vergrößerung mit einem bestimmten Profil zeigt, ausgehend von einem Rohteil, das sich in der Form eines Rohres darstellt, von dem der genannte axiale Durchgang zylindrisch ist, dadurch gekennzeichnet, daß es im wesentlichen darin besteht, die besagte Achse (1) in einer verschiebbaren Matrize (8) zu halten, eines der Enden dieses axialen Durchganges (3) der Achse mit einem Gegenstempel (7b) in Eingriff zu bringen, einen beweglichen Stempel (7a) mit dem anderen Ende des genannten axialen Durchgangs in Eingriff zu bringen und wobei die Achse (1) alsdann auf dem Gegenstempel (7b) unterstützt ist, einen Druck auf den beweglichen Stempel (7a) auszuüben, der geeignet ist, durch Pressen den beiden Enden des genannten axialen Durchgangs (3) die gewünschte profilierte Verformung zu verleihen.
  2. Maschine zur Durchführung des Verfahrens nach Anspruch 1 für die Herstellung einer Achse mit profilierten Enden eines axialen Durchgangs und zwar deren axialer Rotationsdurchgang an seinen Enden eine Vergrößerung mit einem bestimmten Profil zeigt, ausgehend von einem Rohteil, das sich in der Form eines Rohres darstellt, dessen axialer Durchgang zylindrisch ist, dadurch gekennzeichnet, daß sie aufweist: eine Matrize (8), die verschiebbar in einem festen Träger (17) montiert ist und aufweist, entsprechend der Richtung dieser Verschiebung, eine Bohrung (23), die geeignet ist, ein Rohteil der Achse (1) aufzunehmen und durch Verklemmung zu halten; einen Gegenstempel (7b) mit profilierter Schulter (13b), der mit seiner Spitze mit einem Ende dieser Bohrung (23) in Eingriff steht; einem beweglichen Stempel (7a) mit profilierter Schulter (13a), der geeignet ist, mit seiner Spitze mit dem anderen Ende dieser Bohrung (23) in Eingriff zu kommen und mit Druckmitteln, die geeignet sind, eine Kraft auf den genannten beweglichen Stempel (7a) auszuüben in der Art, daß die Enden des axialen Durchgangs (3) des genannten Rohteils der Achse (1) komprimiert und verformt werden durch Pressen zwischen den profilierten Schultern (13a, 13b) der Stempel.
  3. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß die genannte verschiebbare Matrize (8) auf Blöcken (19) ruht, die elastisch zurückgestellt werden durch Federn (20), die in einer Befestigungsfläche (18) gelegen sind, die den genannten Träger (17) trägt.
  4. Maschine nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die genannte verschiebbare Matrize (8) Anschlagschultern (22) aufweist, die das Verlassen des Trägers (17) verhindern.
  5. Maschine nach irgendeinem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die genannte verschiebbare Matrize (8) gebildet ist aus zwei koaxialen Teilen (8a, 8b), die durch ein konisches Einsteckende zusammengefügt sind und deren mittleres Teil, das die genannte Bohrung (23) aufweist, austauschbar ist.
  6. Maschine nach irgendeinem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß sie einen Auswerfer (16) aufweist, der geeignet ist, die Achse (2) aus der Bohrung (23) der verschiebbaren Matrize (8) mit Hilfe des genannten Gegenstempels (7b) auszuwerfen.
  7. Maschine nach irgendeinem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die genannten Schultern (13a, 13b) der Stempel konisch sind.
EP19920402493 1991-09-13 1992-09-11 Verfahren zum Herstellen einer Achse mit profilierten Enden, Maschine zur Durchfuhrung des Verfahrens und damit hergestellte Achse Expired - Lifetime EP0534818B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111332A FR2681267B1 (fr) 1991-09-13 1991-09-13 Procede de fabrication d'un axe a extremites de passage axial profilees, machine pour la mise en óoeuvre du procede et axe ainsi obtenu.
FR9111332 1991-09-13

Publications (2)

Publication Number Publication Date
EP0534818A1 EP0534818A1 (de) 1993-03-31
EP0534818B1 true EP0534818B1 (de) 1995-05-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920402493 Expired - Lifetime EP0534818B1 (de) 1991-09-13 1992-09-11 Verfahren zum Herstellen einer Achse mit profilierten Enden, Maschine zur Durchfuhrung des Verfahrens und damit hergestellte Achse

Country Status (4)

Country Link
EP (1) EP0534818B1 (de)
DE (1) DE69202427T2 (de)
ES (1) ES2074848T3 (de)
FR (1) FR2681267B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102120293A (zh) * 2010-12-30 2011-07-13 江苏森威集团有限责任公司 一种电枢轴的精密锻造加工方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3950940B2 (ja) * 2002-07-25 2007-08-01 株式会社椿本チエイン ブッシュの製造方法
KR100512264B1 (ko) * 2003-07-10 2005-09-02 강근수 헤딩머신에 의한 슬리브핀의 제조장치 및 그 제조방법
CN106077208B (zh) * 2016-08-15 2018-02-09 深圳市华惠连接器有限公司 自动翻边机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR863445A (fr) * 1940-02-16 1941-04-01 Boulonnerie Et De Matricage De Dispositif pour la fabrication, par matriçage de précision, de pièces métalliques telles que des fusées d'obus
US3034840A (en) * 1958-04-21 1962-05-15 Thompson Ramo Wooldridge Inc Piston pins and like articles
DE1577029A1 (de) * 1966-01-26 1970-04-09 Kabel U Metallwerke Neumeyer G Vorrichtung zum Kaltverformen von Stangenabschnitten aus Metall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102120293A (zh) * 2010-12-30 2011-07-13 江苏森威集团有限责任公司 一种电枢轴的精密锻造加工方法

Also Published As

Publication number Publication date
EP0534818A1 (de) 1993-03-31
DE69202427D1 (de) 1995-06-14
ES2074848T3 (es) 1995-09-16
DE69202427T2 (de) 1995-09-14
FR2681267B1 (fr) 1993-12-10
FR2681267A1 (fr) 1993-03-19

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