EP0236672A1 - Dispositif de serrage pour serrer des pièces à usiner sur des établis ou établis de machines ou d'installations d'usinage - Google Patents

Dispositif de serrage pour serrer des pièces à usiner sur des établis ou établis de machines ou d'installations d'usinage Download PDF

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Publication number
EP0236672A1
EP0236672A1 EP87100243A EP87100243A EP0236672A1 EP 0236672 A1 EP0236672 A1 EP 0236672A1 EP 87100243 A EP87100243 A EP 87100243A EP 87100243 A EP87100243 A EP 87100243A EP 0236672 A1 EP0236672 A1 EP 0236672A1
Authority
EP
European Patent Office
Prior art keywords
clamping
eccentric
clamping bolt
bolt
clamping device
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
EP87100243A
Other languages
German (de)
English (en)
Other versions
EP0236672B1 (fr
Inventor
Peter Maier
Hartmut Walter
Wolfgang Dr.-Ing. Kofink
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.)
Festo SE and Co KG
Original Assignee
Festo 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 Festo SE and Co KG filed Critical Festo SE and Co KG
Priority to AT87100243T priority Critical patent/ATE45531T1/de
Publication of EP0236672A1 publication Critical patent/EP0236672A1/fr
Application granted granted Critical
Publication of EP0236672B1 publication Critical patent/EP0236672B1/fr
Expired 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
    • B25B5/08—Arrangements for positively actuating jaws using cams
    • 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
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/163—Jaws or jaw attachments

Definitions

  • the invention relates to a clamping device for clamping workpieces on work tables or work tables of processing devices or machines with the features of the preamble of claim 1.
  • a machine stand for holding angle cutters is known in practice, a generic clamping device being provided on the work table of this machine stand.
  • This clamping device contains a clamping bolt in the form of a screw bolt which is guided from below through a longitudinal slot in the work table and is secured against rotation on the underside of the work table.
  • a clamping jaw is first placed on the screw bolt, formed by an angle piece, and then an eccentric bearing an internal thread, which is rigidly connected to a handle.
  • the eccentric attaches itself to the rear of the upright leg of the contra-angle handpiece and, when it is rotated around the longitudinal axis of the screw bolt, strives for the contra-angle handpiece, i.e. the jaws to push away from the bolt.
  • the screw bolt By rotating the eccentric, the screw bolt is simultaneously clamped in the direction of its longitudinal axis as a result of the internal thread in the eccentric against the underside of the work table or is released from it.
  • the object of the invention is to create a clamping device in which can be brought into any rotational positions with respect to the longitudinal axis of the clamping bolt without impairing the clamping action of the clamping jaws, i.e. in which the clamping jaw can take any azimuth angle, based on the longitudinal axis of the clamping bolt.
  • the handle is pivotally mounted about a transverse axis perpendicular to the longitudinal axis of the clamping bolt and the clamping device with the handle is coupled in terms of drive with respect to a pivoting movement about its transverse axis, after turning the clamping jaw about the longitudinal axis of the clamping bolt, it can first be moved through the handle with the handle still open Clamping device of the eccentric be brought into its optimal starting position without the clamping device being effective. After reaching the optimal starting position for the eccentric, the clamping device can be closed by pivoting the handle about the transverse axis, whereby the clamping device is immovably locked on the work table with the clamping bolt when the clamping jaw is still loose.
  • the handle which is now pivoted into a horizontal position, now allows the eccentric to be rotated to save energy and thus allows the clamping jaw to be pushed forward against the workpiece to be fixed.
  • a very simple to manufacture and reliably working clamping device has a second eccentric which can be actuated by the handle independently of the first eccentric and which interacts with a pressure surface which is displaceable with respect to the clamping bolt.
  • This pressure surface can be supported either indirectly or directly against the top of the work table or the edges of the T-slot if the clamping force is to be achieved by a longitudinal force in the clamping bolt.
  • the second eccentric is mounted on an axis that is axially immovably fastened to the clamping bolt and that runs at right angles to the longitudinal axis of the clamping bolt.
  • a symmetrical distribution of force, which generates almost no bending moments in the clamping bolt, consists in designing the second eccentric forked, both parts being located to the side of the clamping bolt and the axis supporting it being inserted in its two eccentric parts.
  • the transverse axis of the handle can be formed by the axis for mounting the eccentric, with the second eccentric possibly even being formed in one piece with the handle.
  • the combined possibility of movement of the handle in which the one movement actuates the first and the second movement actuates the second eccentric in the sense of the tightening movement thereby achieved, can be achieved according to the invention in that the first eccentric has two jaws which delimit and to the clamping bolt carries parallel extensions, wherein the handle engages in at least one of its pivot positions with respect to its transverse axis in the mouth in order to transmit torques to the first eccentric.
  • the second eccentric is arranged in the mouth between the two extensions and the pressure surface is formed by the base of the mouth.
  • the clamping device In order to prevent excessive clamping of sensitive workpieces, the clamping device has a clamping force limiting device. This ensures that in the event of excessive forces acting on the clamping jaws orthogonal to the clamping bolt, the entire clamping device can move backwards. This measure is also useful if the clamping device is used on workbenches that are composed of individual profile parts and may be somewhat sensitive to excessive transverse forces. In this case, the clamping device evades before the profile parts are bent.
  • a very simple clamping force limiting device is formed by a spring device which is kinematically located in the pressure action path of the second eccentric.
  • a space-saving arrangement is achieved if a pressure piece is seated on the clamping bolt on the side of the first eccentric facing the head of the clamping bolt, while the spring means are preferably arranged in the form of at least one plate spring between the pressure piece and the first eccentric. The pressure piece protrudes through an elongated opening in the clamping jaw.
  • the pressure piece has a radially projecting annular shoulder, such that the clamping jaw moves from the annular shoulder towards the top of the work table is held. On in this way, the clamping jaw is guided between the ring shoulder and the top of the work table or when using a spacer between the ring shoulder and the top of the spacer.
  • a sliding block is preferably seated on the head of the clamping bolt, which can be rotated about the longitudinal axis of the clamping bolt. This results in a large-area contact of the sliding block with the projections of the T-slot or the back of the table, which effectively prevents deformation. If the T-slots are recessed, the spacer can also be extended in the direction of the sliding block, so that no damage can occur here either. For easier handling, the spacer and the sliding block are advantageously locked against one another and can only rotate together on the clamping bolt.
  • spring means can sit in the form of a helical spring in the elongated opening of the jaw, through which the clamping bolt or the pressure piece are passed.
  • the first eccentric has a cylindrical outer surface and the transverse axis is perpendicular to the normal intersecting the axis of the eccentric and the longitudinal axis of the clamping bolt, this results in the actuation of the first eccentric symmetrical conditions, ie depending on the starting position, the clamping jaw can be tightened by turning the handle clockwise or counterclockwise, which is why such a clamping device is suitable for both left-hand and right-hand clamping of the workpiece.
  • a clamping device 1 which serves for clamping of workpieces on workbenches or worktables of machining devices or machines.
  • the clamping device 1 contains, as a central element with which essentially all the other components are held together, a cylindrical clamping bolt 2, at the lower end of which a cylindrical head 3 with a larger diameter than the shaft of the clamping bolt 2 is formed.
  • the bottom component is an approximately cuboid sliding block 4, which contains a stepped bore 5 in the center into which the tightening bolt 2 is inserted from below, the cylindrical head 3 being countersunk in the stepped bore 5.
  • An approximately cuboidal spacer 6, which contains a cylindrical bore 7 for this purpose, is also placed over the sliding block 4 on the clamping bolt 2.
  • the sliding block 4 and the spacer 6 extend with their longest dimension at right angles to the longitudinal axis of the clamping bolt. Both, the sliding block 4 and the spacer 6, are axially displaceable against each other on the clamping bolt 2, but connected to one another in a rotationally secured manner.
  • a clamping jaw 15 which contains a rectangular, plane-parallel plate 16 parallel to the longitudinal axis of the clamping bolt 2, on the lower side of which a horizontally extending guide plate 17 is formed at right angles thereto.
  • the guide plate 17 slides with its flat underside on the likewise flat upper side of the spacer 6 and contains an elongated oval opening 18 approximately in the center, which extends from the upper side of the plate 17 to the underside and through which the clamping bolt 6 passes.
  • the clamping jaw 15 is displaceably guided in the direction perpendicular to the longitudinal axis of the clamping bolt 2, with respect to each azimuth angle on the spacer 6. Since the longer axis of the elongated opening 18 is perpendicular to the plate 16, i.e. the back and the front of which runs, the freedom of movement of the jaw 15 is so far fixed.
  • a cylindrical pressure piece 19 designed as a sleeve, which is pushed onto the clamping bolt 2 and carries a radially projecting cylindrical collar 21 on its upper end face.
  • the section of the pressure piece 19 with a smaller diameter passes through the correspondingly dimensioned elongated opening 18 in the plate 17, so that the lower flat end face of the pressure piece 19 can rest on the flat top of the spacer 6.
  • the distance from the lower edge of the annular shoulder 21 to the top of the distance piece 6 is slightly larger than the thickness of the plate 17, so that when the pressure piece 19 is pressed onto the spacer 6, the jaws 15 on the pressure piece 19 has almost no play in the axial direction, ie in the direction parallel to the longitudinal axis of the clamping bolt 2 , on the other hand, remains' displaceable and rotatable between the annular shoulder 21 and the spacer 6.
  • a first eccentric 22 in the form of a circular cylindrical body is placed on the clamping bolt 2, the surface lines of which extend parallel to the longitudinal axis of the clamping bolt 2.
  • the first eccentric 22 contains a stepped bore 23 which widens downward, based on the illustration in FIG. 1, and whose axis is offset parallel to the axis * of the cylindrical body of the eccentric 22.
  • the expanded part of the stepped bore 23 receives the annular shoulder 21 and two disc springs 24 and 25, which are also attached to the clamping bolt 2 and are located between the flat top of the annular shoulder 21 and the flat step of the stepped bore 23.
  • the two plate springs 24 and 25 serve, as explained further below, as a means for limiting the clamping force.
  • the smaller diameter of the stepped bore 23 is only slightly larger than the outer diameter of the continuously cylindrical clamping bolt 2, so that the clamping bolt 2 cannot escape in the stepped bore 23.
  • the eccentric 22 With its outer circumferential surface, the eccentric 22, which, as the figure shows, is designed as a thick cylindrical disk, bears against the rear side 26 of the plate 16 adjacent to it, i.e. the flat rear side 26 forms a pressure surface against which the eccentric 22 can be supported, so that when the eccentric 22 rotates about the longitudinal axis of the clamping bolt 2, a relative movement between the clamping jaw 15 and the clamping bolt 2 takes place.
  • a fork piece 27 is fixed rigidly, for example for the sake of clarity for the sake of screws not shown, which forms two extensions 28 and 29 projecting parallel to this on both sides of the clamping bolt 2, the mutually opposite surfaces 31 and 32 of which are also flat and run diametrically opposite to each other parallel to the clamping bolt 2.
  • the two flat surfaces 31 and 32 together with a surface 33 connecting them to one another at the lower end, delimit a mouth within which the upper end of the clamping bolt 2 lies.
  • the orientation of the two flat surfaces 31 and 32 is otherwise such that they run parallel to a normal which defines the axis of the bore 23, i.e. the longitudinal axis of the clamping bolt 2 and the axis of the cylindrical eccentric 22 intersects.
  • a hand or actuating handle 35 is pivotally mounted on the end on a transverse axis 34.
  • the transverse axis 34 consists of a cylindrical bolt with a transverse hole, by means of which it is plugged onto the clamping bolt 2 and whose laterally projecting cylindrical sections extend close to the flat surfaces 31 and 32.
  • the Handle 35 is geoabelled at its bearing end, each of the resulting fork ends 36, 37 containing a bore 38, in each of which a section of the transverse axis 34 is inserted, the fork ends 36 and 37 between the clamping bolt 2 and the respectively adjacent flat surface 31 and 32 run, as can be seen in particular in FIG. 2.
  • the forked end of the handle 35 fits with little lateral play between the two flat surfaces 31 and 32, which is why the handle in this area is also provided by flattening with corresponding flat surfaces that lie flat on the flat surfaces 31 and 32, in each pivoted position of the Handle 32 with respect to its transverse axis 38, which is perpendicular to the clamping bolt 2.
  • the two fork ends 31 and 32 are rounded off at 41 to form a quarter-circle cylinder, their associated axis running parallel to the transverse axis 34, but being offset to the right relative to this, with reference to FIG. 1.
  • the two quarter-cylindrical surfaces 41 act as a second eccentric, which can act symmetrically on both sides of the clamping bolt 23 on the pressure surface 33.
  • the two surfaces 41 are therefore referred to below with a second eccentric.
  • the forked ends are followed by a stop surface 42 running at right angles to the longitudinal axis of the handle 35, which together with the Pressure area 33 limits the pivoting movement of the handle 35.
  • the handle 35 can therefore, based on FIG. 1, only be turned clockwise into the horizontal position, starting from the vertical position.
  • a compression spring 43 is provided in the elongated opening 18, which acts between the pressure piece 19 and the inner surface of the opening 18, in such a way that it presses the pressure piece 19 in the direction of the pressure surface 26.
  • the functioning of the clamping device 1 is as follows: By raising the handle 35 into the vertical position, in which the handle 35 extends in the extension of the clamping bolt 7, the second eccentric 41 is brought into a position in which the clamping bolt 7 is extended downward , whereby the clamping means that hold the clamping device 1 in the T-slot, namely the sliding block 4, the spacer 6 and the compression spring 25, are released. Then the first eccentric 22 is turned by turning the handle 35 about its longitudinal axis about c a. 90 0 clockwise or counterclockwise from the position shown in FIG. 1, in which the clamping jaw 15 is its greatest distance from the clamping bolt 2 has turned out.
  • the clamping device 1 In this position of the handle 35, the clamping device 1 is brought up to the workpiece until its clamping jaws 15 or a plastic molding 45 possibly pushed onto the clamping jaw 15 lies against the workpiece in order to protect the workpiece surface.
  • the handle 35 is folded from the vertical position into the horizontal position, as shown in FIGS. 3 and 4.
  • the clamping bolt 2 By turning the handle 35 into the horizontal position, the clamping bolt 2 is pulled upward by the second eccentric 41., Which is supported on the pressure surface 33, and thus also the sliding block 4.
  • the distance between the sliding block 4 and the underside of the spacer 6 is thus reduced and with the handle 35 completely folded down, the projecting edge of the T-slot, in which the device 1 is inserted, is clamped between the spacer 6 and the sliding block 4.
  • the power transmission takes place from the second eccentric 41 on the one hand via the pressure surface 33, the first eccentric 22 under pressure, the spring 25 and the pressure piece 19 to the upper side of the spacer 6.
  • the tensioning force of the second eccentric 41 acts via the transverse axis 34, which supports the second eccentric 41, the screw nut 39, the clamping bolt 2, the head 3 of which is on the sliding block 4.
  • the clamping jaw 15 could easily be rotated easily around the pressure piece 19, although it would, however, perform a translatory movement with respect to the clamping bolt 2.
  • the tensioning movement of the first eccentric 22 can, as can easily be seen, be brought about both by a pivoting movement of the handle 35 in the clockwise direction and by a pivoting movement in the counterclockwise direction, which only depends on whether the eccentrics start in the counterclockwise direction or has been turned clockwise to the starting position.
  • the clamping device 1 can be therefore readily for left and for right to use voltage, if any parts of the workpiece to Actuate the - gungsweg of the handle would limit 35th
  • the eccentric 22 together with the handle 35 remains in the starting position shown in FIG. 1, while the clamping jaws 15 are 90 in relation to the illustration around the clamping bolt 2 ° is turned clockwise or counterclockwise. Subsequently, the handle 35 is flipped over and the clamping device 1 is fixed immovably in the T-slot. Subsequent pivoting of the folded handle 35 results in the clamping.
  • the possible application stroke of the clamping jaw 15 is consequently only dependent on the relative position of the eccentric 22 and the clamping jaws 15 when the handle 35 is folded over in the sense of a clamping of the clamping device 1 in the T-slot.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Multi-Process Working Machines And Systems (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP87100243A 1986-02-08 1987-01-10 Dispositif de serrage pour serrer des pièces à usiner sur des établis ou établis de machines ou d'installations d'usinage Expired EP0236672B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100243T ATE45531T1 (de) 1986-02-08 1987-01-10 Spannvorrichtung zum spannen von werkstuecken auf werktischen oder werktischen von bearbeitungseinrichtungen oder -maschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3604005 1986-02-08
DE19863604005 DE3604005A1 (de) 1986-02-08 1986-02-08 Spannvorrichtung zum spannen von werkstuecken auf werktischen oder werktischen von bearbeitungseinrichtungen oder -maschinen

Publications (2)

Publication Number Publication Date
EP0236672A1 true EP0236672A1 (fr) 1987-09-16
EP0236672B1 EP0236672B1 (fr) 1989-08-16

Family

ID=6293707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100243A Expired EP0236672B1 (fr) 1986-02-08 1987-01-10 Dispositif de serrage pour serrer des pièces à usiner sur des établis ou établis de machines ou d'installations d'usinage

Country Status (4)

Country Link
EP (1) EP0236672B1 (fr)
AT (1) ATE45531T1 (fr)
DE (2) DE3604005A1 (fr)
ES (1) ES2011021B3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737562A1 (fr) * 1994-03-22 1997-02-07 Dea Spa Appareil fixe de support reconfigurable, particulierement destine aux machines de mesure, et procede de configuration s'y rapportant
CN109333413A (zh) * 2018-12-10 2019-02-15 福州麦辽自动化设备有限公司 一种夹具
CN109605070A (zh) * 2018-11-28 2019-04-12 江苏金飞达电动工具有限公司 一种型材切割机
CN109676550A (zh) * 2019-01-16 2019-04-26 沈阳飞机工业（集团）有限公司 一种可变压紧角压紧器

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9000267U1 (fr) * 1990-01-12 1990-08-30 Otto Ganter & Co Kg Normteile Zum Bedienen Und Spannen, 7743 Furtwangen, De
IT1284664B1 (it) * 1996-07-16 1998-05-21 Dea Spa Elemento di supporto riconfigurabile, particolarmente per pezzi atti ad essere misurati da una macchina di misura.
DE10148809A1 (de) * 2001-10-02 2003-05-08 Hilti Ag Bohrständer mit fixierbarer Fussplatte
DE102012204301A1 (de) * 2012-03-19 2013-09-19 Reiner Ruggaber Klemmvorrichtung für eine hinterschnittene Profilnut
CN104057411A (zh) * 2014-06-28 2014-09-24 杨海蓉 一种夹紧装置
CN105666357A (zh) * 2016-03-28 2016-06-15 苏州市合叶精密机械有限公司 一种偏心轮夹紧机构
CN105666368A (zh) * 2016-03-28 2016-06-15 苏州市合叶精密机械有限公司 一种凸轮式夹紧机构
CN105643517B (zh) * 2016-03-30 2017-03-29 苏州博众精工科技有限公司 一种双斜块夹紧装置
CN107855962A (zh) * 2017-12-10 2018-03-30 无锡特恒科技有限公司 转轴凸轮式顶升弹性定位销组件
CN108748265A (zh) * 2018-06-13 2018-11-06 郭金玲 一种保护机器人紧固软材料表面的螺栓
CN109129261A (zh) * 2018-11-05 2019-01-04 深圳市鹏朗贸易有限责任公司 一种加工夹具
CN111745561B (zh) * 2020-06-23 2021-10-22 湖北中烟工业有限责任公司 一种适用于gdx1四号轮出口接烟杆定位的专用工装

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE379874C (de) * 1923-08-29 Heinrich Vollmer Spannstock mit Exzenter
CH266180A (it) * 1948-06-23 1950-01-15 Meyer Guido Morsa senza vite a chiusura rapida.
US3424450A (en) * 1966-01-10 1969-01-28 Leroy T Atkins Shaping template clamp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD66147A (fr) *
US1351232A (en) * 1919-08-22 1920-08-31 George J S Collins Cylinder-block holder
US2524317A (en) * 1945-10-13 1950-10-03 Johansson Alf Nikolaj Vise handle having plural cams to sequentially effect quick-positioning and work-clamping movements of slidable jaw
CH255514A (de) * 1947-03-29 1948-06-30 Knab Karl Einspannwerkzeug.
FR2320447A1 (fr) * 1975-08-08 1977-03-04 Roux Pierre Perfectionnement aux dispositifs de serrage rapide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE379874C (de) * 1923-08-29 Heinrich Vollmer Spannstock mit Exzenter
CH266180A (it) * 1948-06-23 1950-01-15 Meyer Guido Morsa senza vite a chiusura rapida.
US3424450A (en) * 1966-01-10 1969-01-28 Leroy T Atkins Shaping template clamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737562A1 (fr) * 1994-03-22 1997-02-07 Dea Spa Appareil fixe de support reconfigurable, particulierement destine aux machines de mesure, et procede de configuration s'y rapportant
CN109605070A (zh) * 2018-11-28 2019-04-12 江苏金飞达电动工具有限公司 一种型材切割机
CN109333413A (zh) * 2018-12-10 2019-02-15 福州麦辽自动化设备有限公司 一种夹具
CN109676550A (zh) * 2019-01-16 2019-04-26 沈阳飞机工业（集团）有限公司 一种可变压紧角压紧器
CN109676550B (zh) * 2019-01-16 2024-03-08 沈阳飞机工业（集团）有限公司 一种可变压紧角压紧器

Also Published As

Publication number Publication date
EP0236672B1 (fr) 1989-08-16
ES2011021B3 (es) 1989-12-16
DE3760442D1 (en) 1989-09-21
DE3604005A1 (de) 1987-08-13
ATE45531T1 (de) 1989-09-15

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