EP0052379A2 - Dispositif de serrage, notamment étau - Google Patents

Dispositif de serrage, notamment étau Download PDF

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Publication number
EP0052379A2
EP0052379A2 EP81109761A EP81109761A EP0052379A2 EP 0052379 A2 EP0052379 A2 EP 0052379A2 EP 81109761 A EP81109761 A EP 81109761A EP 81109761 A EP81109761 A EP 81109761A EP 0052379 A2 EP0052379 A2 EP 0052379A2
Authority
EP
European Patent Office
Prior art keywords
clamping
jaw
jaw part
workpiece
cheek
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.)
Withdrawn
Application number
EP81109761A
Other languages
German (de)
English (en)
Other versions
EP0052379A3 (fr
Inventor
Gerhard Arnold
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0052379A2 publication Critical patent/EP0052379A2/fr
Publication of EP0052379A3 publication Critical patent/EP0052379A3/fr
Withdrawn legal-status Critical Current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
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws
    • B25B1/2473—Construction of the jaws with pull-down action on the workpiece

Definitions

  • the invention relates to a clamping device, in particular a vise, the clamping jaws of which are at least in two parts, wherein the jaw part which can be placed on the workpiece is supported on its rear jaw part in such a way that, viewed from the workpiece, it slightly deviates outwards when clamped.
  • “Outside below” refers to the slight evasive movement performed by the attachable jaw part under the action of the clamping force with the workpiece to be clamped as a reference point.
  • Such a clamping device has the advantage over a conventional or a simple vice that the clamping jaws on the Workpiece not just a compressive force in horizontal direction, but at the same time also exert a force directed against the contact surface of the vice, so that the resulting force components enclose an obtuse angle of less than 180 ° with one another.
  • the workpiece is drawn into the vise during clamping, in contrast to vices or clamping devices with clamping jaws that can only be moved in the horizontal direction.
  • the workpiece is raised slightly, in particular if it is only clamped with the upper jaw areas, with the result that too much material is removed, for example, in a subsequent machining operation.
  • the known clamping device prevents the workpiece from going up during clamping and, of course, also a downward deflection if it is supported on its underside by, for example, the vice guides or an intermediate plate placed thereon.
  • the divergence of the cheek parts that can be put on compared to their rear cheek parts is achieved in that the two cheek parts lie against one another via inclined surfaces, whereby this wedge effect is then used.
  • Fs is considered to be disadvantageous in that these inclined surfaces wear out over time and there is at least an uneven clamping on the two jaws. With wear and / or permanent deformation This is particularly to be expected if the upper jaw areas are frequently clamped and strong local pressures occur as a result. There is also the risk that chips, grinding dust and the like, in particular in connection with machine tools. Like. Between the inclined surfaces and thereby affects the clamping and work result.
  • the object of the invention is therefore to improve such a clamping device in such a way that the susceptibility to contamination is reduced and a uniform pressure is ensured in the usual clamping tasks.
  • the tensioning device is designed according to the preamble of claim 1 in accordance with the characterizing part of this claim.
  • the jaw part that can be applied does not lie directly against the rear jaw part, at least in the case of the clamping forces that are usually used, but is at a certain distance from the latter. For this reason, the susceptibility to soiling is considerably reduced and a local increase in the pressing force between the two jaw parts that can be applied is also avoided when clamping the workpieces with the upper regions of the two jaws.
  • the resilient spacers are to be designed in such a way that the attachable cheek parts on the one hand dodge in the desired direction when the pressing force of the two packs is firmly against it holding workpiece is sufficiently large and that this evasive movement, on the other hand, is so minimal that the two jaws carry out or attempt to carry out only a very slight downward movement.
  • the latter is particularly important because the jaw parts which can be applied to a workpiece supported at the bottom, at least theoretically, perform a sliding movement downwards with respect to the workpiece if the spring elements yield elastically.
  • An inadmissibly large evasive movement can also be prevented, for example, by letting the cheek part which can be put on, after a predetermined maximum evasive movement, be triggered either on the rear cheek part or, if appropriate, on the guide of the vice or the like.
  • each cheek piece that can be put on is supported on its rear cheek piece by at least one spacer formed as a spring element and inclined to the jaw clamping surface, the end of the spring element associated with the rear cheek piece being located higher than that associated with the cheek piece that can be put on. Because of this inclination, the horizontally applied pressing force causes a downward force component on the movable jaw part.
  • the spring element expediently engages in the region of the upper end on the rear jaw part and on or in the vicinity of the lower end of the jaw part which can be put on. Otherwise, the cheek piece can be put on not only supported resiliently via the spring element or elements, but also advantageously retained on the rear part of the package.
  • each cheek part that can be put on is supported on its rear cheek part via at least one spacer element, which is arranged approximately parallel to the jaw clamping surfaces and is designed as a spring element.
  • the attachable jaw part is not only held by the inclined spring element or elements, but alternatively or additionally by the parallel spring element on the rear jaw part.
  • This parallel spring element must be designed in such a way that it allows the insertable cheek part to deflect towards the rear, this evasive movement not necessarily having to be rectilinear.
  • the spring elements each in the A a leaf spring formed rt and the two jaw parts with the spring elements are strong, but resiliently connected. Spring elements designed in this way can be made relatively stiff on the one hand and on the other hand they can also be subjected to slight torsional stress in addition to bending.
  • a particularly preferred variant of the invention consists in that a central region of the pack part which can be placed on the central part of the centrally arranged, approximately parallel spring element and its two lateral regions each on an inclined spring element are supported. This results in a symmetrical, over the entire width of the jaw resilient support of the insertable jaw part against its rear.
  • a further development of the invention provides that the approximately parallel spring element is further away from the jaw clamping surface than the inclined spring elements. If the jaw part that can be put on does not deviate exactly parallel to itself under the action of the clamping force during spring-elastic yielding, the support point that is decisive for the extremely minimal tilting movement lies far enough away from the clamping area, and a relatively long lever arm is obtained in this way. The longer the latter, the lower the risk of a deviation from the mere parallel adjustment of the cheek piece that can be put on.
  • the jaws By appropriate shaping and dimensioning, it can be ensured that the jaws, if they incline very slightly, especially in the case of an unfavorable force application, the inclination basically takes place in the direction that the gap between the two jaws can only widen at its lower end. This then increases the surface pressure in the upper jaw area, so that you can still count on good clamping conditions.
  • the attachable jaw part has an approximately T-shaped shape, wherein Longitudinal T-bar with lateral play protrudes into a slot in the rear jaw part, in which the approximately parallel spring element is held with its lateral ends, the T-long bar abutting or engaging in the middle on the approximately parallel spring element. It is advantageous if the width of the rear end of the insertable jaw part associated with the parallel spring element is reduced, in particular, in batches. You can thus make the T-longitudinal beam relatively stable and still apply the force only in the central region of the parallel spring element, the length of which can then be approximately the same size as the width of the T-longitudinal beam.
  • a particularly preferred embodiment of the invention provides that the two jaw parts are made in one piece with the spring elements. Both precise casting and machining of the spring elements can be considered as production methods.
  • the jaw part that can be applied distributes the applied clamping force to the spring elements specifically dimensioned in the force absorption in such a way that when a load is less than or equal to the maximum clamping force, the stresses that occur are below the permissible stress values, and that the loadable cheek part rests on the guide at the end of its relatively small spring travel via a vertical stop running transversely to the clamping direction on the cheek parts.
  • the evasive movement is in the range of approx. 2/100 mm. This avoids overstressing the spring elements and at the same time achieves a clear limitation of the evasive movement of the cheek parts that can be put on.
  • the jaw part that can be put on can also be made to strike the guide for the movable jaw of the vice or the like.
  • a vice it can be a version with a fixed and a movable jaw or with two movable packs.
  • each cheek piece that can be put on consists of two fixed but detachable parts connected cheek piece elements.
  • the cheek piece element that can be placed directly on the workpiece is always subject to a certain amount of wear or damage in all such clamping devices and it is therefore advantageous if it can be removed and replaced by another.
  • this design has the advantage that the jaw part element having the pressing surface can also be replaced when it is not damaged, but baking with a differently designed pressing surface or from other material is more suitable for a specific clamping task.
  • the base plate 4 has a cross-sectionally T-shaped guide 5. The adjustment takes place via a rotatable spindle 6 in a known manner which is not of interest here.
  • Both the fixed pack 1 and the movable jaw 3 are each formed in two parts, and they consist of the attachable cheek part 7 or 8 and the rear cheek part 9 or 10.
  • the attachable cheek part 7 or 8 on its rear cheek part held by spring-elastic spacers 11 and 12 and 13.
  • the resilient spacers are only deformed in their elastic area.
  • Fig. 1 they are shown schematically as leaf springs, the precise connection of the jaw parts with the spring-elastic spacers not being shown in view of the clarity of this representation.
  • one-piece manufacture of the jaw parts and the spring-elastic spacers is provided.
  • the resilient spacers preferably have the shape of comparatively thick and short leaf springs. In this respect, they are referred to below as "spring elements 11, 12, 13".
  • spring elements 11, 12, 13 two external spring elements 11 and 12, which are arranged at an angle to the jaw clamping surface 14 and 15, are provided, the end of which is assigned to the rear jaw part 9 and 10, respectively, is higher than the end which is assigned to the attachable jaw part.
  • T-bar with its reduced width 16 is then connected to the parallel spring element 13, this T-bar engaging between two legs 17 and 18 of the rear jaw part 9 and 10, which form a slot 19 between them and which end at the end facing the base plate 4 in a wedge shape against the clamping region 20.
  • each cheek piece that can be put on is constructed from two cheek piece elements 23 and 24 that are firmly but releasably connected to one another.
  • the cheek parts 7 and 8 which can be put in place yield to their rear cheek parts 9 and 10, if the clamping force is sufficiently large.
  • the jaws 1 and 3 exert not only a compressive force acting in the horizontal direction on this workpiece, but also a downward pressure in the direction of the arrow 25. This avoids that the workpieces are slightly removed from their base plate 4 during clamping, which is always the case with vices and similar clamping devices of simple design.
  • the parallel spring elements 13 initially allow the clamping jaws to be displaced parallel to themselves, but this evasive movement can also be superimposed on a minimal tilting movement, although it should be added that the parallel adjustment of the clamping jaws is also limited to a very short distance.
  • the spring elements can be dimensioned in such a way that, when the clamping forces are usually applied by hand, optionally hydraulically reinforced, the jaw parts that can be applied hardly move relative to their rear, but exert the necessary hold-down force on the workpiece in the direction of arrow 25. Then there are also no relative movements between the jaw clamping surfaces and the assigned workpiece surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
EP81109761A 1980-11-19 1981-11-19 Dispositif de serrage, notamment étau Withdrawn EP0052379A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803043606 DE3043606C2 (de) 1980-11-19 1980-11-19 Spannvorrichtung, insbesondere Schraubstock
DE3043606 1980-11-19

Publications (2)

Publication Number Publication Date
EP0052379A2 true EP0052379A2 (fr) 1982-05-26
EP0052379A3 EP0052379A3 (fr) 1983-07-06

Family

ID=6117126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109761A Withdrawn EP0052379A3 (fr) 1980-11-19 1981-11-19 Dispositif de serrage, notamment étau

Country Status (2)

Country Link
EP (1) EP0052379A3 (fr)
DE (1) DE3043606C2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0196544A1 (fr) * 1985-03-18 1986-10-08 3R Management ab Etau pour le support précis d'une pièce
GB2192146A (en) * 1986-06-10 1988-01-06 Peter N Jackson A transverse clamp
GB2193663A (en) * 1986-06-10 1988-02-17 Peter Naughton Jackson A transverse clamp
US4736935A (en) * 1986-01-16 1988-04-12 Santo Vasapolli Vice
EP0362753A1 (fr) * 1988-10-04 1990-04-11 Manfred Schanz Dispositif de fixation
CN107755993A (zh) * 2017-08-24 2018-03-06 深圳市系存通信技术有限公司 机械组装设备精定位装置
CN113941823A (zh) * 2021-11-18 2022-01-18 湖南泰嘉新材料科技股份有限公司 一种分齿机钳口粘结与修磨装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3233915C2 (de) * 1982-09-13 1987-02-12 Oerlikon-Boehringer GmbH, 7320 Göppingen Spannbacke für Aufspannvorrichtungen, insbesondere für Mehrbacken-Spannfutter von Werkzeugmaschinen
DE3827674A1 (de) * 1988-08-16 1990-02-22 Werkzeug Gmbh Spannvorrichtung mit einer festen und einer beweglichen spannbacke
US5019129A (en) * 1990-07-18 1991-05-28 Lars Johanson Workpiece holding system
DE4341744C2 (de) * 1993-12-08 2001-04-19 Emil Stark Tiefziehspanner für Spannvorrichtungen an Werkstückbearbeitungsmaschinen
DE19543621A1 (de) * 1995-11-23 1997-08-21 Johannes Drake Schnellspann-Zwinge
DE29603811U1 (de) * 1996-03-01 1996-04-18 Drake, Johannes, 33106 Paderborn Spannzwinge zur Einhandbedienung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE425019C (de) * 1924-04-26 1926-02-09 Bruno Friedrich Parallelschraubstock
DE1022977B (de) * 1953-05-20 1958-01-16 Ing Bruno Friedrich Parallelschraubstock
CH379230A (fr) * 1961-09-07 1964-06-30 Torossian Edouard Mors d'étau
CH543939A (de) * 1972-04-14 1973-11-15 Spengler Ernst Niederzugbacke
DE2447243B2 (de) * 1974-10-03 1976-11-25 Prewo, Willi, 7126 Sersheim Niederzug-werkstueckspannvorrichtung, insbesondere niederzug-maschinenschraubstock
US4043547A (en) * 1976-12-10 1977-08-23 Chicago Tool And Engineering Company Precision machine vise

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1402404A1 (de) * 1959-12-30 1968-11-28 Joseph Robert Spannvorrichtung,insbesondere fuer Werkzeugmaschinen
US3223405A (en) * 1963-07-24 1965-12-14 Nicholas Gust Jaws for a vise
DE1283169B (de) * 1964-09-25 1968-11-14 Franz Arnold Maschinenschraubstock mit Tiefspannbacken
US3951395A (en) * 1974-11-25 1976-04-20 Control Data Corporation Resilient vise jaw

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE425019C (de) * 1924-04-26 1926-02-09 Bruno Friedrich Parallelschraubstock
DE1022977B (de) * 1953-05-20 1958-01-16 Ing Bruno Friedrich Parallelschraubstock
CH379230A (fr) * 1961-09-07 1964-06-30 Torossian Edouard Mors d'étau
CH543939A (de) * 1972-04-14 1973-11-15 Spengler Ernst Niederzugbacke
DE2447243B2 (de) * 1974-10-03 1976-11-25 Prewo, Willi, 7126 Sersheim Niederzug-werkstueckspannvorrichtung, insbesondere niederzug-maschinenschraubstock
US4043547A (en) * 1976-12-10 1977-08-23 Chicago Tool And Engineering Company Precision machine vise

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0196544A1 (fr) * 1985-03-18 1986-10-08 3R Management ab Etau pour le support précis d'une pièce
US4925168A (en) * 1985-03-18 1990-05-15 System 3R Usa, Inc. Vise
US5063013A (en) * 1985-03-18 1991-11-05 System 3R Usa, Inc. Vise
US4736935A (en) * 1986-01-16 1988-04-12 Santo Vasapolli Vice
GB2192146A (en) * 1986-06-10 1988-01-06 Peter N Jackson A transverse clamp
GB2193663A (en) * 1986-06-10 1988-02-17 Peter Naughton Jackson A transverse clamp
GB2192146B (en) * 1986-06-10 1990-09-05 Peter Naughton Jackson A transverse clamp.
EP0362753A1 (fr) * 1988-10-04 1990-04-11 Manfred Schanz Dispositif de fixation
CN107755993A (zh) * 2017-08-24 2018-03-06 深圳市系存通信技术有限公司 机械组装设备精定位装置
CN113941823A (zh) * 2021-11-18 2022-01-18 湖南泰嘉新材料科技股份有限公司 一种分齿机钳口粘结与修磨装置

Also Published As

Publication number Publication date
DE3043606A1 (de) 1982-07-29
DE3043606C2 (de) 1983-05-26
EP0052379A3 (fr) 1983-07-06

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