EP0271393A1 - Method and device for assembling the constitutive elements of an engine exhaust line - Google Patents

Method and device for assembling the constitutive elements of an engine exhaust line Download PDF

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Publication number
EP0271393A1
EP0271393A1 EP87402626A EP87402626A EP0271393A1 EP 0271393 A1 EP0271393 A1 EP 0271393A1 EP 87402626 A EP87402626 A EP 87402626A EP 87402626 A EP87402626 A EP 87402626A EP 0271393 A1 EP0271393 A1 EP 0271393A1
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EP
European Patent Office
Prior art keywords
support
assembly
positioning
space
exhaust line
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
EP87402626A
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German (de)
French (fr)
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EP0271393B1 (en
Inventor
Philippe Lebourhis
Maurice Przybyl
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
Regie Nationale des Usines Renault
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Renault SAS
Regie Nationale des Usines Renault
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Publication of EP0271393A1 publication Critical patent/EP0271393A1/en
Application granted granted Critical
Publication of EP0271393B1 publication Critical patent/EP0271393B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/02—Assembly jigs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/006—Supporting devices for clamps

Definitions

  • the present invention relates to the assembly and control of the constituent elements of an exhaust line of an internal combustion engine.
  • It relates more particularly to a method and a device intended for such operations, and also applicable for the control of exhaust elements and anti-roll bars.
  • the invention therefore proposes to solve this problem.
  • it relates to such a process which consists, according to an essential characteristic, of precisely positioning in space, these various constituent elements of an exhaust line, by assimilating the straight tubular sections of the latter to vectors in order to be able to press them on adjustable vee assembly supports whose adjustment and positioning parameters are calculated via software and a benchmark called "vehicle benchmark".
  • each assembly support is designed to adjust in this reference, the three coordinates of a point on the axis of the tubular rectilinear section defined in space and chosen as reference for this support on the one hand , and the two angles of inclination and orientation of the vector defining this axis at the point where this support is placed, on the other hand.
  • the assembly of different elements constituting an exhaust line as illustrated in Figure 1 is carried out according to the following principle.
  • the rectilinear and tubular sections of this line are assimilated to vectors, and are supported on assembly supports S in vee. These are judiciously placed and adjusted so as to properly position the pipes, expansion pot, silencer, hooks, legs, supports on flanges, etc.
  • the various adjustment parameters are obtained by means of a program supplied with usual data from the design offices.
  • This grid marble is graduated according to this mark.
  • the different tubular sections are positioned using adjustable assembly supports S which support them ( Figure 5).
  • the programming system comprises a computer, a terminal provided with an alphanumeric keyboard and a screen, a printer and a specific program for the calculation of these adjustment parameters.
  • a device for implementing the assembly and control method described above comprises: - a grid marble O graduated according to the "vehicle reference system"; - and different assembly supports S each made up of the following parts: . a cross tie-back 4, 5, 6 with rectilinear displacements XR, YR; . a v-base 3 mounted on this cross base and capable of rotating by an orientation angle ⁇ ; .a rule 2 integral with this base 3; . a vernier worn-vé 1 sliding on this rule in the direction ZR and capable of rotating by an angle of inclination ⁇ ; . a vernier 17 for volume positioning, integral with a vee 14 and capable of rotating by a pivot angle ⁇ ; . and a vé 14 element holder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)

Abstract

Method for assembling the constitutive elements of an internal-combustion engine exhaust line and anti-wheel-tilt bars; it consists, in particular, in positioning them accurately in space, while assimilating the straight tubular sections thereof with respect to vectors in order to be able to support them on adjustable V-shaped assembly supports (S) whose adjustment and positioning parameters are calculated by means of software and of a so-called "vehicle reference frame" mark. <IMAGE>

Description

La présente invention se rapporte à l'assemblage et au contrôle des éléments constitutifs d'une ligne d'échappement de moteur à combustion interne.The present invention relates to the assembly and control of the constituent elements of an exhaust line of an internal combustion engine.

Elle vise plus particulièrement un procédé et un dispositif des­tinés à de telles opérations, et applicables également pour le contrôle d'éléments d'échappement et de barres anti-devers.It relates more particularly to a method and a device intended for such operations, and also applicable for the control of exhaust elements and anti-roll bars.

Pour ces différentes opérations, une grande précision est requise en raison d'un nombre élevé d'éléments constitutifs (tuyau de sortie de collecteur, tuyau de descente de collecteur, tuyau d'entrée de catalyseur, catalyseur, tuyau d'entrée d'un volume de détente, volume de détente, tuyau de sortie de volume de détente, tuyau d'entrée de silencieux, silencieux, canule), d'une longueur importante de la ligne d'échappement et de la complexité de celle-ci due à un tracé de ligne brisée aux angles alternativement saillants et rentrants.For these different operations, high precision is required due to the high number of constituent elements (manifold outlet pipe, manifold down pipe, catalyst inlet pipe, catalyst, inlet pipe of a expansion volume, expansion volume, expansion volume outlet pipe, muffler inlet pipe, muffler, cannula), of a considerable length of the exhaust line and of the complexity thereof due to a broken line drawn at alternately salient and re-entrant angles.

L'invention se propose donc de résoudre ce problème. A cet effet, et dans l'optique d'un gain de temps et d'une amélioration de la qualité, elle a pour objet un tel procédé qui consiste, suivant une parti­cularité essentielle, à positionner avec précision dans l'espace, ces divers éléments constitutifs d'une ligne d'échappement, en assi­milant les sections rectilignes tubulaires de celle-ci à des vecteurs pour pouvoir les appuyer sur des supports réglables d'as­semblage en vé dont les paramètres de réglage et de positionnement sont calculés par l'intermédiaire d'un logiciel et d'un repère dit "référentiel véhicule".The invention therefore proposes to solve this problem. To this end, and with a view to saving time and improving quality, it relates to such a process which consists, according to an essential characteristic, of precisely positioning in space, these various constituent elements of an exhaust line, by assimilating the straight tubular sections of the latter to vectors in order to be able to press them on adjustable vee assembly supports whose adjustment and positioning parameters are calculated via software and a benchmark called "vehicle benchmark".

Ce procédé permet un positionnement très précis dans l'espace au moyen de supports d'assemblage faciles et rapides à régler. Suivant une autre particularité, chaque support d'assemblage est conçu pour régler dans ce repère, les trois coordonnées d'un point de l'axe de la section rectiligne tubulaire défini dans l'espace et choisi comme référence de ce support d'une part, et les deux angles d'inclinaison et d'orientation du vecteur définissant cet axe au point où est placé ce support, d'autre part.This process allows very precise positioning in space by means of assembly supports that are easy and quick to adjust. According to another particularity, each assembly support is designed to adjust in this reference, the three coordinates of a point on the axis of the tubular rectilinear section defined in space and chosen as reference for this support on the one hand , and the two angles of inclination and orientation of the vector defining this axis at the point where this support is placed, on the other hand.

Il s'avère ainsi facile d'afficher sur un écran, les paramètres de règlage des supports d'assemblage, une fois que l'ordinateur utilisé a enregistré la forme d'une section tubulaire définie par ses coordonnées, ainsi que les emplacements des supports choisis.It is thus easy to display on a screen, the adjustment parameters of the assembly supports, once the computer used has saved the shape of a tubular section defined by its coordinates, as well as the locations of the supports. choose.

D'autres particularités et avantages de l'invention ressortiront plus clairement de la description qui suit, d'un mode de réali­sation préféré, donné à titre d'exemple non limitatif, en réfé­rence aux dessins annexés dans lesquels :

  • - la figure 1 représente une vue en perspective d'une ligne d'échappement ;
  • - la figure 2 représente une vue en perspective d'une implan­tation d'un repère dit "référentiel véhicule" ;
  • - la figure 3 représente un schéma de principe relatif au procédé conforme à l'invention ;
  • - la figure 4 représente une vue schématique en perspective d'un support d'assemblage ;
  • - la figure 5 représente une vue partielle en perspective d'une ligne d'échappement assemblée sur supports en vé ;
  • - la figure 6 représente une vue en élévation d'un support d'assemblage ;
  • - la figure 7 représente une vue de droite de la figure pré­cédente, en coupes partielles suivant A-A et B-B ;
  • - et la figure 8 représente une vue partielle suivant F de la figure 7.
Other particularities and advantages of the invention will emerge more clearly from the description which follows, of a preferred embodiment, given by way of nonlimiting example, with reference to the appended drawings in which:
  • - Figure 1 shows a perspective view of an exhaust line;
  • - Figure 2 shows a perspective view of an installation of a reference called "vehicle reference";
  • - Figure 3 shows a block diagram relating to the method according to the invention;
  • - Figure 4 shows a schematic perspective view of an assembly support;
  • - Figure 5 shows a partial perspective view of an exhaust line assembled on vee supports;
  • - Figure 6 shows an elevational view of an assembly support;
  • - Figure 7 shows a right view of the previous figure, in partial sections along AA and BB;
  • FIG. 8 represents a partial view along F of FIG. 7.

Conformément à l'invention, l'assemblage de différents éléments constituant une ligne d'échappement telle qu'illustrée à la figure 1, est effectué suivant le principe suivant. Les sections rectilignes et tubulaires de cette ligne sont assimilées à des vecteurs, et sont appuyées sur des supports d'assemblage S en vé. Ceux-Ci sont judicieusement placés et réglés de façon à posi­tionner convenablement les tuyaux, pot de détente, silencieux, crochets, pattes, supports sur brides etc...According to the invention, the assembly of different elements constituting an exhaust line as illustrated in Figure 1, is carried out according to the following principle. The rectilinear and tubular sections of this line are assimilated to vectors, and are supported on assembly supports S in vee. These are judiciously placed and adjusted so as to properly position the pipes, expansion pot, silencer, hooks, legs, supports on flanges, etc.

Les différents paramètres de réglage sont obtenus au moyen d'un programme alimenté par des données habituelles en provenance des bureaux d'études.The various adjustment parameters are obtained by means of a program supplied with usual data from the design offices.

En effet, l'assemblage de la ligne d'échappement s'effectue sur un marbre quadrillé (Figure 4).Indeed, the assembly of the exhaust line is carried out on a grid marble (Figure 4).

Les coordonnées des différents points définissant chaque élément constitutif sont données dans le "référentiel véhicule" défini par le bureau d'études (figure 2).The coordinates of the different points defining each constituent element are given in the "vehicle reference system" defined by the design office (Figure 2).

Ce marbre quadrillé est gradué selon ce repère. Le positionnement des différentes sections tubulaires est réalisé à l'aide de supports réglables d'assemblage S qui les soutiennent (figure 5).This grid marble is graduated according to this mark. The different tubular sections are positioned using adjustable assembly supports S which support them (Figure 5).

Ces supports d'assemblage permettent le réglage (figure 3) :
- des trois coordonnées d'un point de l'axe de la section tubulaire défini dans l'espace et choisi comme référence du support ;
- et des deux angles d'inclinaison α et d'orientation β du vecteur définissant l'axe de cette section tubulaire au point où est placé ce support.These assembly supports allow adjustment (Figure 3):
- the three coordinates of a point on the axis of the tubular section defined in space and chosen as a reference support;
- And of the two angles of inclination α and of orientation β of the vector defining the axis of this tubular section at the point where this support is placed.

Le positionnement des différents "volumes" constituant les sections non tubulaires de la ligne d'échappement est rendu possible par l'adoption sur ce support d'assemblage d'un moyen de réglage de la rotation γ de chaque volume autour de son propre axe.The positioning of the different "volumes" constituting the non-tubular sections of the exhaust line is made possible by the adoption on this assembly support of a means of adjusting the rotation γ of each volume around its own axis.

Le calcul des paramètres de réglage de chaque support d'assem­blage porteur de sections tubulaires est réalisé par un logiciel.The calculation of the adjustment parameters of each assembly support carrying tubular sections is carried out by software.

Une fois que les formes des sections tubulaires définies par leurs coordonnées axiales, et les emplacement des supports choisis sont introduits dans l'ordinateur, le traitement peut s'effectuer, puis les paramètres sont affichés en sortie.Once the shapes of the tubular sections defined by their axial coordinates, and the locations of the chosen supports are entered into the computer, the processing can be carried out, then the parameters are displayed on output.

Le système de programmation comprend un ordinateur, un terminal pourvu d'un clavier alphanumérique et d'un écran, une imprimante et un programme spécifique pour le calcul de ces paramètres de réglage.The programming system comprises a computer, a terminal provided with an alphanumeric keyboard and a screen, a printer and a specific program for the calculation of these adjustment parameters.

En référence aux figures 4 à 8, un dispositif pour la mise en oeuvre du procédé d'assemblage et de contrôle précédemment décrit comprend :
- un marbre quadrillé O gradué suivant le"référentiel véhicule" ;
- et différents supports d'assemblage S constitués chacun des pièces suivantes :
. une embasse croisée 4, 5, 6 à déplacements rectilignes XR, YR ;
. une embase porte-vé 3 montée sur cette embase croisée et susceptible de tourner d'un angle d'orientation β ;
.une règle 2 solidaire de cette embase 3 ;
. un vernier porté-vé 1 coulissant sur cette règle suivant la direction ZR et susceptible de tourner d'un angle d'inclinaison α ;
. un vernier 17 de positipnnement de volume, solidaire d'un vé 14 et susceptible de tourner d'un angle de pivotement γ ;
. et un vé 14 porte-élément.With reference to FIGS. 4 to 8, a device for implementing the assembly and control method described above comprises:
- a grid marble O graduated according to the "vehicle reference system";
- and different assembly supports S each made up of the following parts:
. a cross tie-back 4, 5, 6 with rectilinear displacements XR, YR;
. a v-base 3 mounted on this cross base and capable of rotating by an orientation angle β;
.a rule 2 integral with this base 3;
. a vernier worn-vé 1 sliding on this rule in the direction ZR and capable of rotating by an angle of inclination α;
. a vernier 17 for volume positioning, integral with a vee 14 and capable of rotating by a pivot angle γ;
. and a vé 14 element holder.

Claims (4)

1. Procédé pour l'assemblage des éléments constitutifs d'une ligne d'échappement de moteur à combustion interne, caractétisé en ce qu'il consiste notamment à les positionner avec précision dans l'espace en assimilant les sections rectilignes tubulaires de celle-ci à des vecteurs pour pouvoir les appuyer sur des supports réglables d'assemblage (S) en vé dont les paramètres de réglage et de positionnement sont calculés par l'intermé­diaire d'un logiciel et d'un repère dir "référentiel véhicule".1. Method for assembling the constituent elements of an internal combustion engine exhaust line, characterized in that it consists notably in positioning them with precision in space by assimilating the straight tubular sections thereof to vectors in order to be able to press them on adjustable support for assembly (S) in vee, the adjustment and positioning parameters of which are calculated by means of software and of a reference frame "vehicle reference system". 2. Procédé suivant la revendication 1, caractérisé en ce que chaque support d'assemblage est conçu pour régler dans ce repère, les trois coordonnées d'un point de l'axe de la section rectiligne tubulaire défini dans l'espace et choisi comme réfé­rence de ce support d'une part, et les deux angles d'inclinaison et d'orientation du vecteur définissant cet axe au point où est placé ce support, d'autre part.2. Method according to claim 1, characterized in that each assembly support is designed to adjust in this reference, the three coordinates of a point on the axis of the straight tubular section defined in space and chosen as reference on the one hand, and the two angles of inclination and orientation of the vector defining this axis at the point where this support is placed, on the other hand. 3. Procédé suivant la revendication 1 ou 2, caractérisé en ce que chaque support d'assemblage est conçu pour pouvoir régler dans ce repère, l'angle de rotation d'une section non tubulaire dite "volume" autour de son propre axe défini dans l'espace.3. Method according to claim 1 or 2, characterized in that each assembly support is designed to be able to adjust in this reference, the angle of rotation of a non-tubular section called "volume" around its own axis defined in space. 4. Dispositif pour la mise en oeuvre du procédé conformément à l'une quelconque des revendications 1, 2 et 3, caractérisé en ce qu'il comprend :
- un marbre quadrillé (O) gradué suivant le référentiel véhicule ;
- et différents supports d'assemblage (S) constitués chacun des pièces suivantes :
. une embasse croisée (4, 5, 6) à déplacements rectilignes (XR, YR) ;
. une embase porte-vé (3) montée sur cette embase croisée, à rotation (β) ;
. une règle (2) solidaire de cette embase porte-vé ;
. un vernier porte-vé (1) coulissant sur cette règle suivant (ZR) et à rotation (α) ;
. un vernier de positionnement de volume (17) à rota­tion (γ) ;
. et un vé (14) porte-élément4. Device for implementing the method according to any one of claims 1, 2 and 3, characterized in that it comprises:
- a grid marble (O) graduated according to the vehicle reference system;
- and different assembly supports (S) each consisting of the following parts:
. a cross tie-back (4, 5, 6) with rectilinear displacements (XR, YR);
. a v-base (3) mounted on this crossed base, in rotation (β);
. a rule (2) integral with this base v-carrier;
. a caliper carrier (1) sliding on this next rule (ZR) and rotating (α);
. a volume positioning vernier (17) with rotation (γ);
. and a vé (14) element holder
EP19870402626 1986-11-21 1987-11-20 Method and device for assembling the constitutive elements of an engine exhaust line Expired - Lifetime EP0271393B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8616222A FR2607046B1 (en) 1986-11-21 1986-11-21 METHOD AND DEVICE FOR ASSEMBLING THE COMPONENTS OF AN ENGINE EXHAUST LINE
FR8616222 1986-11-21

Publications (2)

Publication Number Publication Date
EP0271393A1 true EP0271393A1 (en) 1988-06-15
EP0271393B1 EP0271393B1 (en) 1991-09-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870402626 Expired - Lifetime EP0271393B1 (en) 1986-11-21 1987-11-20 Method and device for assembling the constitutive elements of an engine exhaust line

Country Status (3)

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EP (1) EP0271393B1 (en)
DE (1) DE3773350D1 (en)
FR (1) FR2607046B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544146A1 (en) * 1991-11-23 1993-06-02 Helmut Christmann Clamping device for workpieces
EP0767297A1 (en) * 1995-10-04 1997-04-09 Friedrich Boysen GmbH & Co. KG Process for assembling and welding resp. completing exhaust systems for motor vehicles
WO2003011678A1 (en) * 2001-07-27 2003-02-13 Audi Ag Transport protection device
EP1787748A2 (en) * 2005-11-18 2007-05-23 Dipl.-Ing. H. Schulz HDS Hydraulic GmbH & Co. KG Auxiliary device for manufacturing hydraulic hoses
WO2013036790A1 (en) * 2011-09-07 2013-03-14 Robert Bosch Gmbh Workpiece clamp for miter saw
CN105171649A (en) * 2015-08-28 2015-12-23 芜湖恒隆汽车转向系统有限公司 Workpiece clamp for adjustable marking machine
WO2016046472A1 (en) * 2014-09-25 2016-03-31 Renault S.A.S. Method of discrete manufacturing of a sub-assembly of elements of an exhaust line by means of a jig

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5302510B2 (en) * 2007-02-23 2013-10-02 東海ゴム工業株式会社 Bending hose shape inspection tool
CN103028879B (en) * 2012-12-11 2015-09-16 芜湖市顺昌汽车配件有限公司 A kind of steering drive axle assembly tooling
CN110000726A (en) * 2019-04-16 2019-07-12 解玉梅 A kind of material tests fixed clamping device that can carry out multi-faceted rotation
CN114714076B (en) * 2022-03-18 2022-11-22 佛山市南海建泰铝制品有限公司 Annular assembly line of walking aid appliance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713725A (en) * 1954-10-07 1955-07-26 Shakespeare O Goldsmith Tube gage
CH434150A (en) * 1965-03-19 1967-04-15 Lienhard Rene Process for prefabrication of pipe strings composed of pipe and / or molded parts and device for carrying out the process
US3507487A (en) * 1967-03-30 1970-04-21 Lummus Co Workbench for pipe assembly
GB1505258A (en) * 1975-10-22 1978-03-30 Automotive Prod Co Ltd Manufacture of elongate elements
FR2531488A1 (en) * 1982-08-05 1984-02-10 Gautier Lucien Novel burnt-gas exhaust system for vehicles and especially for lorries.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713725A (en) * 1954-10-07 1955-07-26 Shakespeare O Goldsmith Tube gage
CH434150A (en) * 1965-03-19 1967-04-15 Lienhard Rene Process for prefabrication of pipe strings composed of pipe and / or molded parts and device for carrying out the process
US3507487A (en) * 1967-03-30 1970-04-21 Lummus Co Workbench for pipe assembly
GB1505258A (en) * 1975-10-22 1978-03-30 Automotive Prod Co Ltd Manufacture of elongate elements
FR2531488A1 (en) * 1982-08-05 1984-02-10 Gautier Lucien Novel burnt-gas exhaust system for vehicles and especially for lorries.

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544146A1 (en) * 1991-11-23 1993-06-02 Helmut Christmann Clamping device for workpieces
EP0767297A1 (en) * 1995-10-04 1997-04-09 Friedrich Boysen GmbH & Co. KG Process for assembling and welding resp. completing exhaust systems for motor vehicles
WO2003011678A1 (en) * 2001-07-27 2003-02-13 Audi Ag Transport protection device
EP1787748A2 (en) * 2005-11-18 2007-05-23 Dipl.-Ing. H. Schulz HDS Hydraulic GmbH & Co. KG Auxiliary device for manufacturing hydraulic hoses
EP1787748A3 (en) * 2005-11-18 2007-08-08 Dipl.-Ing. H. Schulz HDS Hydraulic GmbH & Co. KG Auxiliary device for manufacturing hydraulic hoses
WO2013036790A1 (en) * 2011-09-07 2013-03-14 Robert Bosch Gmbh Workpiece clamp for miter saw
US9387572B2 (en) 2011-09-07 2016-07-12 Robert Bosch Gmbh Workpiece clamp for miter saw
WO2016046472A1 (en) * 2014-09-25 2016-03-31 Renault S.A.S. Method of discrete manufacturing of a sub-assembly of elements of an exhaust line by means of a jig
FR3026434A1 (en) * 2014-09-25 2016-04-01 Renault Sas METHOD FOR INDIVIDUALLY MANUFACTURING A SUBASSEMBLY OF EXHAUST LINE ELEMENTS USING A TEMPLATE
CN105171649A (en) * 2015-08-28 2015-12-23 芜湖恒隆汽车转向系统有限公司 Workpiece clamp for adjustable marking machine

Also Published As

Publication number Publication date
FR2607046B1 (en) 1989-03-31
FR2607046A1 (en) 1988-05-27
DE3773350D1 (en) 1991-10-31
EP0271393B1 (en) 1991-09-25

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