EP0441725A1 - Gasfeder-betriebenes Spannelement für diverse Werkstücke - Google Patents

Gasfeder-betriebenes Spannelement für diverse Werkstücke Download PDF

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Publication number
EP0441725A1
EP0441725A1 EP91420037A EP91420037A EP0441725A1 EP 0441725 A1 EP0441725 A1 EP 0441725A1 EP 91420037 A EP91420037 A EP 91420037A EP 91420037 A EP91420037 A EP 91420037A EP 0441725 A1 EP0441725 A1 EP 0441725A1
Authority
EP
European Patent Office
Prior art keywords
jaw
clamping
ramp
piston
chamber
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
EP91420037A
Other languages
English (en)
French (fr)
Other versions
EP0441725B1 (de
Inventor
Joel Diot
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.)
Dimeco Enoma SA
Original Assignee
Dimeco Enoma 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 Dimeco Enoma SA filed Critical Dimeco Enoma SA
Publication of EP0441725A1 publication Critical patent/EP0441725A1/de
Application granted granted Critical
Publication of EP0441725B1 publication Critical patent/EP0441725B1/de
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
    • 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
    • B25B5/08—Arrangements for positively actuating jaws using cams
    • B25B5/087—Arrangements for positively actuating jaws using cams actuated by a hydraulic or pneumatic piston

Definitions

  • the present invention relates to the immobilization of various parts on trays, plates, working or machining tables or on any other similar support with respect to which any part must be firmly immobilized temporarily.
  • the invention relates to the immobilization of work pieces on machine tool tables.
  • the immobilization of parts on any support is generally carried out by direct or indirect mechanical clamping.
  • the invention relates to direct clamping.
  • the flanges used to ensure direct immobilization, are, generally, of the mechanical type and most often comprise an anchoring foot of the lardon type, capable of being fitted into a groove, of the Tee type, presented by the support.
  • the mechanical flange comprises, in elevation from the foot, a kind of tie rod or the like, or even a body supporting a movable jaw whose position can be adjusted by a screw or toggle control.
  • a screw control ensures immobilization capable of withstanding high stresses, but its relatively long commissioning does not allow adaptation in work sequences with high intervention frequencies.
  • the clamping force is only dependent on the manual action. of the operator, so that variable pressure constraints can intervene with all the damaging consequences likely to be attached to a tightening that is too weak or too strong.
  • hydraulic flanges have a speed of action greater than that of the mechanical flanges, on the other hand, they require to be permanently connected to two hydraulic circuits whose size is always inconvenient. Such dependence removes any possibility of autonomous use.
  • the present invention aims to solve the above drawbacks by proposing an autonomous clamping flange, produced in the form of an elementary assembly, functionally autonomous, which can be adapted to all fields of application, whenever it is necessary. to temporarily immobilize a part or any object on a support.
  • Fig. 1 is a sectional elevation of a first embodiment of the flange according to the invention.
  • Fig. 2 is a transverse view taken along line II-II of FIG . 1 .
  • Fig. 3 is a sectional elevation of another form of realization of the flange according to the invention.
  • Fig. 4 is a sectional elevation of another embodiment of the object of the invention.
  • Figs. 5 to 7 are sections taken, respectively, along the lines VV to VII-VII of FIG. 4 .
  • Fig. 8 is a partial section taken on the line VIII-VIII of FIG. 7 .
  • Fig. 9 is a perspective, in exploded view, illustrating the particular conformation of two constituent elements of the example according to FIGS. 4 to 8 .
  • Figs. 1 and 2 show a first embodiment of an independent gas clamping clamp 1 designed, according to the invention, to immobilize a part 2 relative to a support 3 , illustrated in the form of a machine tool table .
  • a table has, from place to place, grooves 4 , of the inverted tee type, which are used to ensure the adaptation of the flange 1 .
  • the flange 1 comprises a body 5 which forms directly at its base a connecting and anchoring foot 6 of the lardon type, capable of being engaged in a groove 4 of complementary profile.
  • the body 5 preferably has a gallows shape and comprises an upper part 7 extending in overhang from the body 5 and parallel to the foot 6 .
  • the upper part 7 defines a closed cylinder 8 , in particular by a plug 9 , which may or may not be removable.
  • the cylinder 8 communicates, by its bottom, with a concentric bore 10 opening out inside a blind housing 11 opening onto the face of the terminal part 7 oriented in the direction of the foot 6 .
  • the cylinder 8 contains a piston 12 delimiting, inside the cylinder 8 , two chambers with inversely variable volumes 13 and 14 .
  • the piston 12 capable of sliding with sealing inside the cylinder 8 , is extended by a rod 15 sliding with sealing in the bore 10 .
  • the rod 15 forms at the end a protruding wedge 16 in the housing 11 to cooperate with a ramp 17 formed by a clamping jaw 18 , capable of slide in the housing 11 .
  • the sliding direction xx ′ of the clamping jaw 18 is perpendicular to the sliding direction yy ′ of the piston 12 .
  • the clamping jaw 18 is, preferably, projecting continuously from the lower face 7a and can be retained within the housing 11 by any appropriate technical means, such as a shoulder, a ring or a member elastic return, such as 18 a .
  • the ramp 17 can be formed directly by the jaw 18 or, preferably, by a ball joint 19 , of spherical or substantially semi-cylindrical type, placed in a complementary cavity presented by the jaw 18 to offer the ramp 17 in cooperation with corner 16 .
  • the chamber 13 constitutes a closed capacity in which is confined a charge of fluid, preferably gaseous, under pressure, for example introduced via a valve plug 20 closing a conduit 21 opening into the chamber 13 .
  • the chamber 14 of the cylinder 8 communicates with an extended conduit 22 , externally to the body 7 , by a connector 23 , preferably of the quick type, making it possible to connect the chamber 14 to a circuit 24 capable of delivering, in a controlled manner, a pressure fluid, preferably hydraulic, developing in the chamber 14 an opposing force greater than that generated in the chamber 13 by the gas charge.
  • the ramp 17 makes, with respect to a plane PP ′ perpendicular to the axis xx ′ , an angle ⁇ complementary to the angle ⁇ ′ presented by the corner 16 .
  • the angles ⁇ and ⁇ ′ are of the non-reversible actuation type, that is to say that the displacement of the piston 12 , in the direction of the arrow f2 , produces the sliding of the clamping jaw 18 in the clamping stroke in the direction of the arrow f2 , without a reverse mutual actuation being able to intervene.
  • the flange When it is appropriate to place the part 2 on the support or the table 3 , the flange is connected, by the connector 13 , to the source 24 which delivers, in the chamber 14 , a fluid under pressure higher than that of confinement of the gas charge inside the chamber 13 .
  • the piston 12 is thus biased in the opposite direction to that of the arrow f2 , so that the erasing of the clamping jaw 18 can intervene, directly or indirectly.
  • Such a phase occurs, preferably, after adaptation of the flange 1 on the table 3 , by cooperation between the foot 6 and at least one of the grooves 4 .
  • the fluid source 24 is disconnected from the connector 23 to release the pressure prevailing in the chamber 14 .
  • the charge of gas confined in the chamber 13 then causes the piston 12 to move in the direction of the arrow f2 .
  • the corner 16 acts on the ramp 17 which pushes the jaw 18 in the direction of the arrow f1 , so as to exert a clamping action between the jaw and the foot 6 to clamp the part 2 between the table 3 and the jaw 18 .
  • the clamping action is exerted by the flange 1 independently, due to the charge of pressurized fluid trapped in the chamber 13 .
  • the immobilization of the part 2 therefore remains effective, without requiring any intervention from an operator, as long as a connection to the source 24 is not established.
  • the flange according to the invention has an irreversible type wedge and ramp mechanism which makes it possible to maintain a relative clamping force, even if the gas pressure accidentally drops in chamber 13 .
  • the clamping mechanism through the wedge 16 and the jaw 18 , provides a stiffening stiffness which has a certain advantage, in the case where the immobilization of the part 2 must undergo relatively large dynamic forces, even generating vibrations.
  • the energy required for unlocking, provided by the source 24 involves a high relative pressure which is only applied to the flange in the unclamping phase.
  • this form of actuation makes it possible to reduce the high pressure which would ordinarily be necessary if the clamping action intervened by connection between the chamber 13 and the source 24 , in replacement of the on-board gas charge. .
  • the application of the release pressure takes place in a generally very short time, so that the flange is only very slightly stressed by this pressure and can therefore be produced in a reliable and robust manner, without involving mobile equipment. of very high technical characteristic, able to work efficiently and durably at the release pressure.
  • FIG. 3 Another embodiment is illustrated in FIG. 3 in which the piston rod 15 is extended by the wedge 16 which acts on an indirect type clamping system.
  • the wedge 16 acts on a jaw 181 , internal to the housing 11 , which is closed by a plug 30 for possible guidance of this jaw.
  • a tie rod 31 is supported on the jaw 181 opposite the ramp 17 .
  • the tie freely crosses the jaw 181 , the corner 16 by a notch 32 and the body 5 which has a heel 33 forming the jaw 18 of the previous example, in association with the jaw 181 .
  • the tie rod Externally to the body 5 , the tie rod has a foot 6 able to cooperate with a groove 4 .
  • the support of the tie rod on the jaw 181 is preferably provided by a threaded end piece 34 allowing the useful length of the tie rod 31 to be adjusted.
  • the clamping action of the part 2 on the support 3 occurs, as before, by the action of the gaseous charge pushing the piston in the direction of the arrow f2 .
  • the corner 16 acts on the ramp 17 to lift the jaw 181 which carries with it the tie rod 31 immobilized by the foot 6 in the groove 4 .
  • a relative downward movement of the body 5 is, in this way, produced with application of the static jaw 33 on the part 2 pressed on the table 3 .
  • the corner 16 is extended by a finger 36 , capable of projecting out of the body 5 , to constitute a visual witness to the state of clamping or unclamping of the flange.
  • FIGS. 4 to 9 A preferred embodiment of the object of the invention is illustrated in FIGS. 4 to 9 in which the same references designate the same constituent elements as those described above.
  • the clamping jaw 18 is produced in the form of a solid piece forming the nose 41 .
  • the jaw 18 comprises, opposite a bearing heel 43 , a convex profile 44 cooperating with a complementary wall 11b of the housing 11 .
  • the jaw 18 has an edge 45 for adapting an elastic member 46 working in traction and responsible for bringing the jaw 18 back into a retraction position relative to the housing 11 .
  • the end portion of the jaw 18 opposite the nose 41 , has, below the edge 45 , two inclined ramps 47 and 48 which occupy different planes corresponding to two orthogonal control directions perpendicular to the axis xx ′ .
  • the ramps 47 and 48 are intended to cooperate with two complementary ramps 49 and 50, respectively formed by the wedge 16 which can be formed directly by the piston rod 12 or by an independent part, as shown in FIG. 9 .
  • the piston 12 Under the action of the fluid charge occupying the chamber 13 , the piston 12 is moved, in the direction of the arrow f2 , so that the corner 16 comes to cooperate, firstly, by the ramp 49 with the ramp 47 of the bit 18 .
  • the movement in the direction of the arrow f2 causes the extension of the nose 41 outside the body 5 , in a direction which is perpendicular to the axis yy ′ .
  • the cooperation of the ramp 50 with the ramp 48 causes the jaw 18 to tilt or pivot, simultaneously with its extension stroke, by pressing on the heel 43 with concomitant guidance, by cooperation of the profile 44 with the wall 11 b .
  • the action of the piston 12 therefore produces, in a first time, an extension stroke bringing the exit of the nose 41 out of the body 5 then, by pivoting-tilting, the clamping of the part 2 between the nose 41 and the support or the table 3 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Clamps And Clips (AREA)
EP19910420037 1990-02-05 1991-02-04 Gasfeder-betriebenes Spannelement für diverse Werkstücke Expired - Lifetime EP0441725B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001486 1990-02-05
FR9001486A FR2657804B1 (fr) 1990-02-05 1990-02-05 Bride de serrage autonome, a gaz, pour pieces diverses.

Publications (2)

Publication Number Publication Date
EP0441725A1 true EP0441725A1 (de) 1991-08-14
EP0441725B1 EP0441725B1 (de) 1995-11-15

Family

ID=9393512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910420037 Expired - Lifetime EP0441725B1 (de) 1990-02-05 1991-02-04 Gasfeder-betriebenes Spannelement für diverse Werkstücke

Country Status (3)

Country Link
EP (1) EP0441725B1 (de)
DE (1) DE69114538T2 (de)
FR (1) FR2657804B1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578989A1 (de) * 1992-07-16 1994-01-19 Luciano Trindade De Sousa Monteiro Spannvorrichtung mit Nocken und mit schwingendem Spannarm
US5400078A (en) * 1992-09-18 1995-03-21 Sgs-Thomson Microelectronics S.A. Circuit for identifying television standards
CN104551257A (zh) * 2015-01-14 2015-04-29 新昌县荣进机械有限公司 一种液压镁锭切削机
CN107486743A (zh) * 2017-09-29 2017-12-19 重庆维庆液压机械有限公司 液压缸夹具的工作方法
CN107486744A (zh) * 2017-09-29 2017-12-19 重庆维庆液压机械有限公司 液压缸夹具
CN108098410A (zh) * 2017-12-26 2018-06-01 保定向阳航空精密机械有限公司 一种内孔液压辅助支承缸
CN109926857A (zh) * 2019-04-23 2019-06-25 上海矢力机械设备有限公司 一种夹紧装置及其驱动方法
CN111136302A (zh) * 2019-12-30 2020-05-12 绍兴圣万特热流道有限公司 一种用于热流道加工的打孔加工设备
CN113044559A (zh) * 2021-04-13 2021-06-29 烟台工程职业技术学院(烟台市技师学院) 一种智能制造用组装设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104907861A (zh) * 2014-03-11 2015-09-16 苏州春兴精工股份有限公司 一种气动夹具锁紧装置
CN105583642A (zh) * 2014-10-23 2016-05-18 富鼎电子科技(嘉善)有限公司 定位装置
CN107263139B (zh) * 2017-06-27 2019-10-22 鹰普（中国）有限公司 一种自定心辅助夹紧装置
CN113385752A (zh) * 2021-07-08 2021-09-14 山西风源机械制造有限公司 一种适用于单头螺杆泵转子加工的定位夹紧装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087041A1 (de) * 1982-02-08 1983-08-31 Deere & Company Spannklemme zum Montieren von Druckplatten oder dgl. auf dem Arbeitstisch von Stempelpressen
DE8702023U1 (de) * 1987-02-11 1987-04-23 Hörner, Bernd, Dipl.-Ing., 42287 Wuppertal Hydraulisches Spannelement
US4721293A (en) * 1986-08-12 1988-01-26 Jergens, Inc. Self-locking clamping device
DE3736421C1 (en) * 1987-10-28 1988-10-27 Hilma Gmbh Maschf Workholding fixture with retractable clamping jaw

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087041A1 (de) * 1982-02-08 1983-08-31 Deere & Company Spannklemme zum Montieren von Druckplatten oder dgl. auf dem Arbeitstisch von Stempelpressen
US4721293A (en) * 1986-08-12 1988-01-26 Jergens, Inc. Self-locking clamping device
DE8702023U1 (de) * 1987-02-11 1987-04-23 Hörner, Bernd, Dipl.-Ing., 42287 Wuppertal Hydraulisches Spannelement
DE3736421C1 (en) * 1987-10-28 1988-10-27 Hilma Gmbh Maschf Workholding fixture with retractable clamping jaw

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578989A1 (de) * 1992-07-16 1994-01-19 Luciano Trindade De Sousa Monteiro Spannvorrichtung mit Nocken und mit schwingendem Spannarm
US5400078A (en) * 1992-09-18 1995-03-21 Sgs-Thomson Microelectronics S.A. Circuit for identifying television standards
CN104551257A (zh) * 2015-01-14 2015-04-29 新昌县荣进机械有限公司 一种液压镁锭切削机
CN107486743A (zh) * 2017-09-29 2017-12-19 重庆维庆液压机械有限公司 液压缸夹具的工作方法
CN107486744A (zh) * 2017-09-29 2017-12-19 重庆维庆液压机械有限公司 液压缸夹具
CN108098410A (zh) * 2017-12-26 2018-06-01 保定向阳航空精密机械有限公司 一种内孔液压辅助支承缸
CN109926857A (zh) * 2019-04-23 2019-06-25 上海矢力机械设备有限公司 一种夹紧装置及其驱动方法
CN109926857B (zh) * 2019-04-23 2024-04-12 上海矢力机械设备有限公司 一种夹紧装置的驱动方法
CN111136302A (zh) * 2019-12-30 2020-05-12 绍兴圣万特热流道有限公司 一种用于热流道加工的打孔加工设备
CN113044559A (zh) * 2021-04-13 2021-06-29 烟台工程职业技术学院(烟台市技师学院) 一种智能制造用组装设备

Also Published As

Publication number Publication date
EP0441725B1 (de) 1995-11-15
FR2657804B1 (fr) 1993-09-24
DE69114538T2 (de) 1996-04-18
DE69114538D1 (de) 1995-12-21
FR2657804A1 (fr) 1991-08-09

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