EP0701882B1 - Dispositif de serrage pour pièces en cours d'usinage ou similaires - Google Patents

Dispositif de serrage pour pièces en cours d'usinage ou similaires Download PDF

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Publication number
EP0701882B1
EP0701882B1 EP95113442A EP95113442A EP0701882B1 EP 0701882 B1 EP0701882 B1 EP 0701882B1 EP 95113442 A EP95113442 A EP 95113442A EP 95113442 A EP95113442 A EP 95113442A EP 0701882 B1 EP0701882 B1 EP 0701882B1
Authority
EP
European Patent Office
Prior art keywords
slider member
clamping
counter
workpiece
slide
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
EP95113442A
Other languages
German (de)
English (en)
Other versions
EP0701882A2 (fr
EP0701882A3 (fr
Inventor
Hans Klingel
Markus Hessbrüggen
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.)
Trumpf SE and Co KG
Original Assignee
Trumpf SE and Co KG
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 Trumpf SE and Co KG filed Critical Trumpf SE and Co KG
Publication of EP0701882A2 publication Critical patent/EP0701882A2/fr
Publication of EP0701882A3 publication Critical patent/EP0701882A3/fr
Application granted granted Critical
Publication of EP0701882B1 publication Critical patent/EP0701882B1/fr
Anticipated expiration legal-status Critical
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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive

Definitions

  • the invention relates to a device for clamping workpieces or the like.
  • a workpiece holder with two clamping bodies arranged on opposite sides of the workpiece and displaceable relative to one another, the one clamping body being displaceable in the clamping direction on at least one slide that can be acted upon by a source for a pressure medium and the slide (s) is (are) connected via a deflection gear to at least one counter slide, on which the other tensioning body can be displaced in the opposite direction of the tensioning body on the slide side.
  • the invention relates in particular to a device of the type mentioned, on which the counter slide is acted upon by the deflecting gear outside of its central axis in the direction of displacement.
  • Devices of this type are used, for example, on machine tools and serve to fix the workpiece to be machined in the machining position in a defined manner.
  • the slide With a clamping jaw attached to it, is moved as a clamping body with force applied in the direction of the workpiece arranged between the clamping bodies. Coupled with the slide via the deflection gear, the counter slide is also moved with a clamping jaw in the direction of the workpiece.
  • the slide and counter slide move in the clamping direction the same distance until they are supported with their full and opposing clamping forces via the clamping jaws on opposite sides of the workpiece. Accordingly, the workpiece is automatically centered between the clamping jaws of the workpiece holder.
  • the workpiece is fixed in the clamping position by means of a single workpiece holder with two clamping bodies. Accordingly, the known devices disadvantageously result in a single-axis workpiece centering, namely centering in the direction of the common movement axis of the clamping bodies displaced relative to one another, unless additional centering takes place through the shape of the clamping bodies.
  • a further disadvantage is that, in the known devices, only two clamping or holding forces are introduced into the workpiece over the circumference thereof.
  • the known devices for clamping workpieces Danger of inaccurate workpiece centering, especially under the influence of the workpiece loads associated with workpiece machining.
  • the invention is based on the object of creating a device for clamping workpieces or the like, on which an improved or simplified position fixing of the clamped workpiece is ensured compared to the known devices.
  • At least one further workpiece holder is provided on a device of the type mentioned at the outset and that the slider of different workpiece holders can be acted upon in parallel by means of the source for the pressure medium.
  • the device according to the invention can be used in particular for clamping workpieces whose surface areas acted upon by the clamping bodies on the slide and counter slide have different distances from one another in the clamping position in the direction of the centering axes of the different workpiece holders, and on which slide and counter slide of the different workpiece holders each have to travel different path lengths until the assigned clamping bodies come to rest on the workpiece to be clamped.
  • a preferred embodiment of the device according to the invention is characterized in that two workpiece holders are provided with clamping bodies lying opposite one another in pairs, the clamping directions of the pairs of clamping bodies enclosing an angle, preferably an approximately right angle.
  • the forces for clamping the workpiece are introduced in a manner distributed over its circumference. As a result, secure all-round support of the workpiece in the clamping position is to be ensured.
  • the use of an embodiment with clamping directions running at right angles to one another is particularly recommended for workpieces with a rectangular cross section.
  • the shape of the clamping jaws which are adapted to the cross section of the workpiece is held on the sides facing the workpiece.
  • the clamping bodies can be formed in one piece with the slides or counter slides of the workpiece holder.
  • a complementary gear symmetrical with respect to the central axis of the counter slide, is provided on a device of the type mentioned at the beginning, on which the counter slide is acted upon by the deflection gear outside of its central axis in the direction of displacement, via which the slide (s) is connected to the counter slide.
  • a complementary gear symmetrical with respect to the central axis of the counter slide
  • the symmetrical application of force to the counter slide in the direction of displacement takes place in that the slide (s) is (are) displaceably connected to two legs which cross over the workpiece on opposite sides and on one leg via the deflection gear and is connected to the other leg via the complementary gear with the counter slide.
  • the deflecting gear and the complementary gear each have a two-armed lever which can be rotated about an axis of rotation extending transversely to the direction of displacement of the slide (s) and the counter slide, the levers on one Support the lever arm on the slide (s), if necessary on the legs connected to the slide (s), and on the other lever arm on the counter slide.
  • the two two-armed levers arranged symmetrically with respect to the central axis of the counter slide allow the required deflection of the movement of the slide into a counter movement of the counter slide using structurally simple means.
  • a groove-like receptacle is provided on the sides facing the lever of the legs connected to the slide (s) and on the opposite sides of the counter slide, in which supports the associated end of the respective lever arm of the two-armed lever.
  • the two-armed levers are supported in a further advantageous embodiment of the invention by means of a rotatable support roller at the ends of the lever arms in the respectively associated receptacle with the the connected leg (s) and on the counter slide.
  • a rotatable support roller at the ends of the lever arms in the respectively associated receptacle with the the connected leg (s) and on the counter slide.
  • the symmetrical introduction of force into the counter slide is accomplished in that the counter slide and the legs connected to the slide (s) are formed on the opposite sides over at least a partial length in the direction of displacement as racks and that the reversing gear and the complementary gear each have a pinion rotatable about a rotational axis extending transversely to the direction of displacement of the legs and the counter-slide, which meshes with the racks on the legs and on the counter-slide.
  • a preferred embodiment of the device according to the invention is characterized in that the measures described above are provided in combination both for the symmetrical introduction of force into the counter slide and for exact multi-axis centering and reliable support of the workpiece.
  • the clamping device shown in Fig. 1 is used on laser processing machines and serves to fix the workpieces to be machined.
  • the workpieces are fixed by means of two pairs of clamping bodies designed as clamping jaws, of which clamping jaws 1, 2 are shown in detail in FIG. 1.
  • the clamping jaws 1, 2 are guided in the direction of a double arrow 3 so as to be displaceable relative to one another on a housing 4 of the clamping device.
  • the clamping jaws of the second pair of clamping jaws, not shown in FIG. 1, are offset from the clamping jaws 1, 2 perpendicular to the plane of the drawing and arranged rotated by 90 ° and can be displaced relative to one another in the direction of a double arrow 5.
  • a jaw 28 of the second pair of jaws is shown in FIG. 2.
  • a circular arc 6 inside the clamping device marks its maximum opening width.
  • the clamping jaw 1 is screwed to sliders 7a, 7b, which are designed as piston rods of pneumatic piston-cylinder units 8a, 8b and by means of double-acting pistons 9a, 9b in pneumatic cylinders 10a, 10b are displaceable in the direction of the double arrow 3.
  • a guide rod 13 mounted in a sliding guide on the housing 4 serves to guide the clamping jaw 1 in the direction of displacement.
  • the slides 7a, 7b are connected via the clamping jaws 1 to legs 11, 12, which grip the interior of the clamping device in a fork-like manner.
  • the legs 11, 12 are guided by slide bearings on the housing 4 and have groove-like receptacles 14, 15 at their ends facing away from the clamping jaw 1.
  • two-armed levers 16, 17 are supported by support rollers 18, 19.
  • the two-armed levers 16, 17 are pivotally connected to the housing 4 of the clamping device about axes of rotation 20, 21. At their ends facing away from the legs 11, 12, the two-armed levers 16, 17 engage in groove-like receptacles in the form of fork pieces 24, 25 via support rollers 22, 23.
  • the fork pieces 24, 25 are secured against displacement on a counter slide 26 which is guided on the housing 4 of the clamping device so as to be displaceable in the direction of the double arrow 3 and carries the clamping jaws 2 at an end facing the clamping jaw 1.
  • a central axis 27 of the counter slide 26 is indicated by dash-dotted lines in FIG. 1.
  • the central axis 27 of the counter slide 26 coincides with the axis of symmetry of the slide 7a, 7b.
  • the two-armed levers 16, 17 form the essential components of a deflection gear and a complementary gear which is symmetrical with respect to the central axis 27 of the counter slide 26.
  • the counter slide 26 forms together with the slides 7a, 7b, the clamping jaws 1, 2 and the above-mentioned gear elements a workpiece holder for the workpiece to be machined.
  • a second workpiece holder of the clamping device shown comprises the pair of clamping jaws, not shown in FIG. 1, with the clamping jaws offset relative to the clamping jaws 1, 2 shown and is constructed according to the workpiece holder described above. 2 shows the clamping jaws 28, slides 29a, 29b designed as piston rods on double-acting pistons 30a, 30b and pneumatic cylinders 31a, 31b, pneumatic piston-cylinder units 32a, 32b.
  • Fig. 1 indicated by broken lines are two-armed levers 33, 34 of the second workpiece holder.
  • the pneumatic cylinders 10a, 10b, 31a, 31b are connected in parallel with a pneumatic pressure source, not shown, via a switching valve 35.
  • the switching valve 35 can be switched in two switching positions I, II. In the switching position I of the switching valve 35 shown in FIG. 2, the clamping device is open.
  • a workpiece If a workpiece is now to be fixed by means of the clamping device, it must first be inserted into the interior of the clamping device.
  • the switching valve 35 is then switched from the switching position I shown in FIG. 2 to the switching position II.
  • the double-acting pistons 9a, 9b, 30a, 30b of the piston-cylinder units 8a, 8b, 32a, 32b are pressurized on their piston surfaces facing away from the clamping jaws 1, 28. Under the effect of the pressurization, the slides 7a, 7b and the slides 29a, 29b move towards the center of the clamping device.
  • the displacement movement of the slides 7a, 7b is converted via the legs 11, 12 and the two-armed levers 16, 17 supported on them into a movement of the counter slide 26 opposite to the movement of the slides 7a, 7b.
  • Corresponding kinematics result from the displacement of the slides 31a, 31b for the counter slide, not shown, assigned to them.
  • the clamping jaws 1, 2 first run onto the workpiece on the surfaces facing them. Due to the coupling of the displacement movements of the two clamping jaws 1, 2 and the 1: 1 ratio when transmitting the displacement movement of the slide 7a, 7b to the counter slide 26, the workpiece is centered in the direction of their common movement axis by the clamping jaws 1, 2.
  • the clamping jaw 28 and the clamping jaw displaced coupled therewith run onto the surfaces assigned to them of the workpiece.
  • the offset arrangement of the pairs of jaws perpendicular to the plane of FIG. 1 enables the jaws to come into contact with the workpiece without interfering with each other during the displacement movement. Due to the parallel connection of the slide 7a, 7b; 29a, 29b, the clamping jaws 1, 2 initially rest on the workpiece almost without pressure. Accordingly, the workpiece can also be centered in the direction of the axis of movement thereof by the clamping jaws 28 and the clamping jaws coupled to the clamping jaws 1, 2.
  • the full clamping pressure builds up on all clamping jaws at the moment in which the centering in the direction of both movement axes, namely both in the direction of the movement axis of the clamping jaws 1, 2 and in the direction of the common movement axis of the clamping jaw 28 and the clamping jaw associated therewith, is completed is.
  • the rectangular profile shown in dashed lines in FIG. 1 is held symmetrically to the center of the clamping device.
  • the embodiment of a clamping device shown in FIG. 3 is used in particular for clamping workpieces whose cross section deviates from the rectangular shape.
  • shaped jaws in the form of pressure pieces 36, 37, 38, 39 are screwed onto the clamping jaws 1, 2 of the first pair of clamping jaws, as well as onto the clamping jaws, not shown, of the second pair of clamping jaws, which are rotated by 90 ° with respect to the first pair of clamping jaws.
  • the pressure pieces 36, 37, 38, 39 are adapted to the cross section of the workpiece to be clamped.
  • the pressure pieces 36, 37, 38, 39 as shown in Fig. 3, designed such that a large-area support of the assigned surface of the profile is guaranteed. 3
  • the pressure pieces 36, 37; 38, 39 and the associated pairs of clamping jaws are arranged in one and the same plane parallel to the drawing plane according to FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Claims (11)

  1. Dispositif de serrage pour pièces en cours d'usinage ou similaires, avec un porte-pièce doté de deux corps de serrage (1, 2, 28) disposés sur des côtés mutuellement opposés de la pièce et pouvant être déplacés l'un par rapport à l'autre, l'un (1, 28) des corps de serrage pouvant être déplacé dans la direction de serrage par au moins un coulisseau (7a, 7b, 29a, 29b) pouvant être alimenté en force au moyen d'une source de fluide sous pression, et le ou les coulisseaux (7a, 7b, 29a, 29b) étant reliés par l'intermédiaire d'une transmission de renvoi à au moins un coulisseau antagoniste (26), par lequel l'autre corps de serrage (2) peut être déplacé en direction contraire du corps de serrage (1) côté coulisseau(x), caractérisé en ce qu'au moins un porte-pièce supplémentaire est prévu, et en ce que les coulisseaux (7a, 7b, 29a, 29b) des différents porte-pièce peuvent être alimentés en force en parallèle au moyen de la source de fluide sous pression.
  2. Dispositif selon la revendication 1, caractérisé en ce que deux porte-pièce avec des corps de serrage (1, 2, 28) mutuellement opposés par paires sont prévus, les directions de serrage des paires de corps de serrage (1, 2, 28) formant un angle, de préférence un angle approximativement droit.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que des mors profilés (36, 37, 38, 38), dont la forme est adaptée à la section de la pièce, sont fixés sur les côtés des corps de serrage (1, 2, 28) qui sont tournés vers la pièce.
  4. Dispositif selon la revendication 3, caractérisé en ce que les mors profilés (36, 37, 38, 38) sont fixés de manière amovible sur les corps de serrage (1, 2, 28).
  5. Dispositif selon le préambule de la revendication 1, dans lequel la transmission de renvoi alimente en force le coulisseau antagoniste (26) en dehors de son axe médian (27) dans la direction de déplacement, caractérisé en ce qu'est prévue une transmission complémentaire, symétrique à la transmission de renvoi par rapport à l'axe médian (27) du coulisseau antagoniste (26) et par l'intermédiaire de laquelle le ou les coulisseaux (7a, 7b, 29a, 29b) sont reliés au coulisseau antagoniste (26).
  6. Dispositif selon la revendication 5, caractérisé en ce que le ou les coulisseaux (7a, 7b, 29a, 29b) sont reliés en déplacement à deux branches (11, 12) qui engagent en recouvrement la pièce sur deux côtés mutuellement opposés à la manière d'une fourche, et sont reliés au coulisseau antagoniste (26) par l'intermédiaire de la transmission de renvoi par l'une des branches (11, 12) et par l'intermédiaire de la transmission complémentaire par l'autre branche (11, 12).
  7. Dispositif selon la revendication 6, caractérisé en ce que la transmission de renvoi ainsi que la transmission complémentaire présentent chacune un levier à deux bras (16, 17) rotatif autour d'un axe de rotation (20, 21) s'étendant transversalement à la direction de déplacement du ou des coulisseaux (7a, 7b, 29a, 29b) ainsi que du coulisseau antagoniste (26), les leviers (16, 17) s'appuyant par l'un des bras de lever contre le ou les coulisseaux (7a, 7b, 29a, 29b), le cas échéant contre les branches (11, 12) reliées au(x) coulisseau(x) (7a, 7b, 29a, 29b), et par l'autre bras de lever contre le coulisseau antagoniste (26).
  8. Dispositif selon la revendication 7, caractérisé en ce qu'un logement respectif du genre rainure (14, 15, 24, 25) est prévu sur les côtés des branches (11, 12) reliées au(x) coulisseau(x) (7a, 7b, 29a, 29b) qui sont tournés vers le levier (16, 17) ainsi que sur les côtés opposés du coulisseau antagoniste (26), l'extrémité associée des bras de lever respectifs des leviers à deux bras (16, 17) s'appuyant dans ces logements.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que les leviers à deux bras (16, 17) s'appuient par l'intermédiaire d'un galet d'appui rotatif respectif (18, 19, 22, 23) aux extrémités des bras de levier dans le logement respectivement associé (14, 15, 24, 25) des branches (11, 12) reliées au(x) coulisseau(x) (7a, 7b, 29a, 29b) et du coulisseau antagoniste (26).
  10. Dispositif selon la revendication 6, caractérisé en ce que le coulisseau antagoniste (26) ainsi que les branches (11, 12) reliées au(x) coulisseau(x) (7a, 7b, 29a, 29b) sont réalisés, sur leurs côtés mutuellement opposés, sous la forme de crémaillères sur au moins une longueur partielle dans la direction de déplacement, et en ce que la transmission de renvoi ainsi que la transmission complémentaire présentent chacune un pignon rotatif autour d'un axe s'étendant transversalement à la direction de déplacement des branches (11, 12) et du coulisseau antagoniste (26), pignon qui engrène avec les crémaillères des branches (11, 12) ainsi que du coulisseau antagoniste (26).
  11. Dispositif selon une des revendications 5 à 10, caractérisé par les caractéristiques d'au moins une des revendications 1 à 4.
EP95113442A 1994-09-10 1995-08-26 Dispositif de serrage pour pièces en cours d'usinage ou similaires Expired - Lifetime EP0701882B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9414699U 1994-09-10
DE9414699U DE9414699U1 (de) 1994-09-10 1994-09-10 Vorrichtung zum Einspannen von Werkstücken o.dgl.

Publications (3)

Publication Number Publication Date
EP0701882A2 EP0701882A2 (fr) 1996-03-20
EP0701882A3 EP0701882A3 (fr) 1996-10-16
EP0701882B1 true EP0701882B1 (fr) 1997-10-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113442A Expired - Lifetime EP0701882B1 (fr) 1994-09-10 1995-08-26 Dispositif de serrage pour pièces en cours d'usinage ou similaires

Country Status (3)

Country Link
EP (1) EP0701882B1 (fr)
JP (1) JP2956025B2 (fr)
DE (2) DE9414699U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110757379A (zh) * 2019-12-10 2020-02-07 无锡职业技术学院 一种油压夹具装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29820630U1 (de) * 1998-11-20 1999-02-18 Trumpf GmbH + Co., 71254 Ditzingen Zuführeinrichtung für wenigstens ein Werkstück an einer Bearbeitungsmaschine
DE102016221227A1 (de) * 2016-10-27 2018-05-03 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Vorrichtung zum Einspannen von Werkstücken sowie Anordnung und Werkzeugmaschine mit einer derartigen Vorrichtung
CN107695746A (zh) * 2017-11-16 2018-02-16 重庆市乐珐机电有限责任公司 法兰盘固定夹具
CN112222603B (zh) * 2020-09-17 2021-11-16 湖南坤鼎数控科技有限公司 一种基于弹力作用的摩擦焊静龙门工作台夹持固定板
CN112247469A (zh) * 2020-10-15 2021-01-22 李高师 一种工业机械钢管定位焊接装置
CN113601223A (zh) * 2021-09-13 2021-11-05 江苏沈数机床自动化设备有限公司 一种用于立式加工中心的卧式加工工装装置
CN114985921B (zh) * 2022-05-14 2023-10-27 常州比优特机械科技有限公司 齿轮齿条传动全行程重载激光切管卡盘
CN117102519B (zh) * 2023-03-15 2025-09-30 南昌意达机械配件有限公司 一种航空配件加工用车孔装置及其车孔方法

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JPS55144947A (en) * 1979-04-19 1980-11-12 Asake Seikou Kk Automatic centering clamp for forged product
JPS6017661B2 (ja) * 1981-09-18 1985-05-04 本田技研工業株式会社 自動車のブレ−キデイスク研削機の研削精度向上装置
JPH0226587Y2 (fr) * 1986-08-28 1990-07-19
JPH0829468B2 (ja) * 1987-07-29 1996-03-27 相生精機株式会社 工作機械用ワ−ク位置決め兼クランプ装置
DE4237422C2 (de) * 1991-12-18 1993-12-09 Magerl Feinmechanik Gmbh Werkstückhaltevorrichtung für auf Werkzeugmaschinen mehrseitig zu bearbeitende Werkstücke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110757379A (zh) * 2019-12-10 2020-02-07 无锡职业技术学院 一种油压夹具装置

Also Published As

Publication number Publication date
DE9414699U1 (de) 1994-11-03
JP2956025B2 (ja) 1999-10-04
EP0701882A2 (fr) 1996-03-20
DE59500753D1 (de) 1997-11-06
EP0701882A3 (fr) 1996-10-16
JPH08168931A (ja) 1996-07-02

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