EP0196544B1 - Etau pour le support précis d'une pièce - Google Patents

Etau pour le support précis d'une pièce Download PDF

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Publication number
EP0196544B1
EP0196544B1 EP86103650A EP86103650A EP0196544B1 EP 0196544 B1 EP0196544 B1 EP 0196544B1 EP 86103650 A EP86103650 A EP 86103650A EP 86103650 A EP86103650 A EP 86103650A EP 0196544 B1 EP0196544 B1 EP 0196544B1
Authority
EP
European Patent Office
Prior art keywords
clamping
bed
reference surface
longitudinal channel
clamping jaw
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
EP86103650A
Other languages
German (de)
English (en)
Other versions
EP0196544A1 (fr
Inventor
Börje Ramsbro
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.)
3R MANAGEMENT AB
Original Assignee
3R MANAGEMENT AB
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 3R MANAGEMENT AB filed Critical 3R MANAGEMENT AB
Publication of EP0196544A1 publication Critical patent/EP0196544A1/fr
Application granted granted Critical
Publication of EP0196544B1 publication Critical patent/EP0196544B1/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
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2484—Supports
    • 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
    • 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
    • B25B1/2489—Slideways

Definitions

  • the invention relates to a vice with a bed over which a first fixed, a first clamping plate having clamping jaw rises, and with a second, movably guided on the bed, rising above the bed, a second clamping plate having clamping jaw, with a on the bed rotatably mounted spindle is rotatably connected, the spindle extending in a longitudinal channel formed in the bed, and in the longitudinal channel is surrounded by a foot of the second clamping jaw, which is connected to the second clamping plate via a neck captured in a longitudinal slot of the bed.
  • the vice is suitable for holding a precisely aligned workpiece in a machine tool, in particular relative to the cutting wire of a wire cutting spark erosion machine.
  • Wire cutting spark erosion machines have the peculiarity compared to other machine tools that the working area in which the workpiece can be held in front of the cutting wire is limited. This working area is usually limited on the one hand by a feed device for the cutting wire and on the other hand by the receiving device for the used cutting wire. If a workpiece is to be held in the work area with a vise, it is therefore necessary for the vise to take up as little space as possible within the work area.
  • a vice with a clamping jaw is known from US Pat. No. 4,411,415, in which the clamping plate is connected to the head of the clamping jaw via connecting members. These connecting links are directed obliquely downwards onto the bed of the vise and serve to hold the workpiece on the bed when the clamping jaws are tightened against the workpiece.
  • This vice intended for boring mills, is of a very massive construction and is therefore not suitable for use in the work area of a wire cutting spark erosion machine.
  • the connecting links are designed such that they are the cause of considerable alignment deviations of the workpiece.
  • the use of articulated connecting links is prohibited in spark erosion machines because the inevitable play in the joints prevents the tolerances in the alignment of the workpiece from being observed.
  • the invention is intended to create a vice which allows a workpiece to be held precisely relative to a predetermined reference and also has a construction which is as light as possible so that it can hold workpieces ready for processing by a wire-cutting spark erosion machine over a relatively large dimensional range .
  • the invention provides that a flat reference surface extending transversely to the clamping plates and between them is formed on relatively thin side walls of the bed defining the longitudinal channel, that at least two adjacent clamping surfaces extending in the direction of the reference surface are formed on the side walls, of which a first clamping surface is inclined relative to the reference surface, and the second clamping surface is inclined in opposite directions relative to the reference surface, and that at least two clamping surfaces adjacent to the clamping surfaces are formed on the second clamping jaw, of which the first clamping surface is parallel to the first clamping surface and the second clamping surface extends parallel to the second clamping surface.
  • the engagement of the clamping surfaces in the clamping surfaces when clamping a workpiece on the reference surface of the bed by means of the clamping jaws prevents the side walls of the vice, which define the reference surface as well as the slot and the longitudinal channel, from evading laterally under the action of the forces that occur.
  • This makes it possible to choose a very flat design for the bed with relatively thin side walls defining the slot and the longitudinal channel.
  • the Flat design has the advantage of a small footprint, so that the invention is particularly suitable for holding a workpiece precisely in the working area of a wire-cutting spark erosion machine.
  • the longitudinal channel has at least two parallel grooves, each of which is provided with one of the clamping surfaces, the foot having two parallel projections, each of which is provided with one of the clamping surfaces.
  • the clamping surfaces and clamping surfaces are directed outwards and upwards. The wedge-shaped engagement of clamping surfaces in clamping surfaces holds the relatively thin-walled bed together in such a way that the reference surface remains flat.
  • the longitudinal channel has a rectangular cross section that is larger than that of the slot, the grooves can be formed at the transition from the slot to the longitudinal channel.
  • the clamping surfaces can be formed on both sides next to the reference surface, the head of the second clamping jaw then having lateral tongues on which the clamping surfaces are formed.
  • the bed of the vise is pressed together from above by tightening the second clamping jaw and held in alignment, since the clamping surfaces and clamping surfaces are directed outwards and downwards.
  • the tongues can expediently be formed on the clamping plate.
  • At least one of the clamping plates can be connected to the head of the associated clamping jaw via parallel elastic bridges, the bridges being directed obliquely downwards onto the bed. It proves to be advantageous if the clamping plate with head and bridge are made from one piece, since the required dimensional accuracy of the workpiece holder is then ensured.
  • an infeed of a machine part can be achieved by an elastically deformable element which can be pressurized and which is interposed between a solid base and an arm connected to the base via an elastically deformable web.
  • the vise has a leveling device for the reference surface, which has the shape of at least one open slot which is cut into the flesh of the plate from a side edge of a plate forming the bed and extends essentially parallel to the reference surface. It proves to be expedient if a lug which delimits an expansion of the slot is formed on the plate.
  • an adjustable stop which limits the compression of the slot can be provided.
  • the slot expediently ends in front of the center of the plate, so that another, similar slot can be cut into the meat of the plate from the opposite side of the plate.
  • 1, 2 and 12 has a base plate 3, which forms a bed of the vice, which has a substantially rectangular shape and is made of tool steel.
  • the base plate 3 has substantially flat outer surfaces. In the embodiment of the invention shown in the drawing, one dimension of the base plate is very much smaller than the others, so that the base plate 3 is very thin in a side view and in a top view (FIGS. 2, 12) compared to the known vice.
  • a thick, solid mounting block 2 extends from the underside 30 of the base plate 3, through which a plurality of mounting holes 32, 34, 36, 38 extend.
  • the holes allow the vice to be fastened to a base (not shown) by means of bolts or the like.
  • the base plate 3 and the mounting block 2 consist of one piece.
  • two tracks 50, 52 are formed which extend in the longitudinal direction of the bed and parallel to one another.
  • the two tracks 50, 52 are exactly flat and lie in a common plane.
  • the tracks 50, 52 can therefore be used as a reference surface for setting up a rectangular workpiece 25 in a wire cutting spark serve rosion machine (not shown).
  • the workpiece 25 is indicated by dashed lines in FIG. 1.
  • a fixed jaw 4 rises above one end of the top 5 of the base plate 3.
  • the fixed jaw 4 has a head 42, the side surfaces of which are extensions of the adjacent surfaces of the base plate 3.
  • a first clamping plate 44 is connected via two parallel first bridges 46, 48 to that end face 49 of the first clamping jaw head 42 which points to the tracks 50, 52.
  • Each of the first bridges 46, 48 has the same width as the first jaw head 42 and the first clamping plate 44 and extends downward from the end face 49 at an acute angle.
  • the first clamping plate 44 is held slightly above the adjacent end of the tracks 50, 52, namely slightly above their common plane.
  • the first clamping plate 44 and the first bridges 46, 48 and the first clamping jaw head 42 are cut from a single piece of metal.
  • a longitudinal slot 8 is cut into the bed of the base plate 3, which is defined according to FIGS. 4, 10 and 11 by two opposite wall sections 82, 84 of the base plate 3, the inner surfaces of which are parallel to the opposite outer surfaces 35, 37 of the base plate 3 extend.
  • a longitudinal channel 7 of substantially rectangular cross-section is cut into the bed immediately below the slot 8, which communicates with the longitudinal channel 7, so that the longitudinal channel 7 opens into the reference surface through the longitudinal slot 8.
  • the wall sections 72, 74 that define the longitudinal channel 7 are thinner than the upper wall sections 82, 84, and the inner surfaces 76, 78 of these wall sections 72, 74 run parallel to the corresponding outer surfaces 35, 37 of the base plate 3.
  • a wedge is formed which is directed into the interior of the longitudinal channel 7 and which is provided with clamping surfaces 62, 64 which are outwardly and with respect to the reference surface are inclined at the top.
  • the vice comprises a second clamping jaw (FIGS. 5 and 6).
  • the second clamping jaw 6 has a foot 61, the cross-sectional shape of which is adapted to the cross-sectional shape of the longitudinal channel 7.
  • the foot 61 thus has opposite side surfaces 63, 65, each of which is intended to slide along the associated, opposite inner surface 76 or 78 of the longitudinal channel 7.
  • the side surfaces 63, 65 are exactly flat and run exactly parallel to one another and perpendicular to sliding surfaces 54, 56, which are formed at the lower end of the head 69 next to and above the neck 67.
  • the foot 61 has the neck 67 which fits into the longitudinal slot 8.
  • the transition from the neck 67 to each of the side surfaces 63, 65 is formed into an outward extension which has clamping surfaces 66, 68, each of which cooperates with one of the clamping surfaces 62, 64 when the foot 61 enters the longitudinal channel 7 and the longitudinal slot 8 is introduced.
  • the second clamping jaw 6 has a head 69, on the end face 71 of which a second clamping plate 73 is fastened via a pair of parallel second bridges 75, 77. Each of these bridges faces downward toward foot 61.
  • the foot 61 is longer than the head of the second clamping jaw 6 and has a longitudinal bore 79.
  • the front section 81 of the longitudinal bore 79 which is removed from the head 69, has a reduced diameter and an internal thread into which one with an external thread provided spindle 94 (Fig. 12) can engage.
  • the spindle 94 is screwed into the front section 81 of the longitudinal bore 79 of the second clamping jaw 6, and the foot 61 together with the spindle 94 is inserted into the longitudinal channel 7 and the longitudinal slot 8, when viewing FIG. 1 from the left forth, introduced so that the clamping plates 44 and 73 assign to each other.
  • the second clamping jaw 6 then rides on the reference surface, that is to say the surfaces 54 and 56 ride on the tracks 52 and 50, respectively.
  • the spindle protrudes over the two lateral ends of the base plate 3 from the longitudinal channel, it can be moved in this by one on the End of the spindle 94 firmly attached handle 96 and an intermediate plate 97 are attached, which are placed on the right-hand end of the spindle 94 protruding from the longitudinal channel 7 over the right side of the base plate 3.
  • the opposite end of the spindle is fastened by a pair of nuts 98, 99 and an intermediate washer 100, which are applied to the left end of the spindle 94, which projects beyond the left-hand end of the longitudinal channel (FIGS. 1 and 12).
  • the spindle 94 rotates accordingly, so that the second clamping jaw slides over the tracks 50, 52.
  • each slot 15, 16 completely penetrates the thickness of the base plate and follows a stepped line to a final hole 17 or 18, which is located near the center of the base plate 3. Both holes 17, 18 are arranged symmetrically to the center and are equidistant from the reference surface.
  • the stepped line that each slot 15, 16 follows is designed so that an outwardly extending lug 12 and 13 is created.
  • the slots 15, 16 divide the base plate 3 into an upper section 11 and a lower section 12, which are held together by that part of the base plate which is located between the closing holes.
  • each outer end 20 or 21 of the lower section 12 an upwardly directed threaded hole 22 (FIG. 3) is cut, into which a set screw 18, 19 is screwed.
  • the upper end face of each of the set screws abuts the opposite underside of the upper section 11.
  • the upper section 11 can be raised slightly by turning one of the two set screws 18, 19.
  • An inwardly directed arm 24, 26 of the upper section engages the associated outwardly extending nose 12 and 13, respectively, so that the abutment of each arm against the associated nose forms a stop for the upward bending of the corresponding part of the upper section 11 of the base plate 3. Therefore, if the reference surface should be curved convexly when clamping the workpiece 25, this deviation can be eliminated by turning the corresponding set screw, whereby the associated part of the upper section is raised slightly and the tracks 50, 52 are aligned in the reference surface.
  • FIGS 7, 8 and 9 show a second embodiment of the invention, which relates to the formation of the clamping surfaces and the clamping surfaces.
  • each of the webs 50, 52 is provided on its outer longitudinal edge with an outwardly inclined clamping surface 62 ', 64'.
  • the clamping plate 63 'of the second clamping jaw 6' is provided with downwardly extending aprons 75 ', on which clamping surfaces 66', 68 'are formed, which are inclined downwards and outwards with respect to the reference surface.
  • the downwardly extending skirts abut the downward and outward clamping surfaces and prevent the walls defining the longitudinal slot and the longitudinal channel from bending away from a straight line.
  • the wedges at the transitions between the longitudinal slot and the longitudinal channel are omitted.
  • these aprons can be provided on the opposite lower side ends of the head 69 'of the clamping jaw 6'.
  • a shaft can be provided which can be clamped in a hydraulic chuck of a spark erosion machine.
  • different fastening devices can be provided instead of the assembly block explained above.

Landscapes

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

Claims (12)

1. Etau avec un banc (3) au-dessus duquel s'élève un premier mors de serrage fixe (4) comportant une première plaque de serrage (44), ainsi qu'avec un second mors de serrage (6; 6') qui est guidé de manière mobile sur le banc (3), qui s'élève au-dessus du banc, qui comporte une seconde plaque de serrage (73; 73') et qui est lié en rotation à une broche (94) fixée à rotation sur le banc, la broche s'étendant dans un canal longitudinal pratiqué dans le banc et étant entourée, dans le canal longitudinal, par un pied (61) du second mors de serrage (6), ledit pied étant relié à la seconde plaque de serrage (73; 73') par l'intermédiaire d'un col (67) logé dans une fente longitudinale (8) du banc (3), caractérisé en ce que, sur des parois latérales relativement minces (72, 74) du banc (3) définissant le canal longitudinal (7), est réalisée une surface de référence plane (50, 52) s'étendant transversalement aux plaques de serrage (44, 73, 73') et entre celles-ci, en ce que, sur les parois latérales, sont réalisées au moins deux surfaces de serrage voisines (62, 64; 62', 64') qui s'étendent dans le sens de la surface de référence et dont une première surface de serrage (62, 62') est inclinée par rapport à la surface de référence (50, 52), et la seconde surface de serrage (64, 64') est inclinée en sens contraire par rapport à la surface de référence, et en ce que, sur le second mors de serrage (6,6') sont réalisées au moins deux surfaces de blocage (66, 68; 66', 68') dont la première surface de blocage s'étend parallèlement à la première surface de serrage et la seconde surface de blocage s'étend parallèlement à la seconde surface de serrage.
2. Etau conforme à la revendication 1, caractérisé en ce que le canal longitudinal (7) comporte au moins deux gorges parallèles qui sont munies chacune d'une des surfaces de serrage, et en ce que le pied (61) comporte deux saillies parallèles dont chacune est munie d'une des surfaces de blocage.
3. Etau conforme à la revendication 1 ou 2, caractérisé en ce que le canal longitudinal (7) a une section transversale rectangulaire qui est supérieure à celle de la fente (8), et en ce que les gorges sont réalisées au niveau de la transition entre la fente et le canal longitudinal.
4. Etau conforme à l'une des revendications précédentes, caractérisé en ce que les surfaces de serrage sont réalisées des deux côtés à côté de la surface de référence (Figs. 7 à 9), et en ce que la tête (69, 69') du second mors de serrage (6, 6') comporte des languettes (75') sur lesquelles sont réalisées les surfaces de blocage.
5. Etau conforme à l'une des revendications précédentes, caractérisé en ce qu'au moins une des plaques de serrage (44, 73, 73') est reliée à la tête (42, 69) du mors de serrage (4, 6) par l'intermédiaire de ponts (46, 48; 75, 77) parallèles élastiques et inclinés par rapport à la surface de référence.
6. Etau conforme à la revendication 5, caractérisé en ce que les plaques de serrage respectives avec la tête du mors de serrage et les ponts sont réalisées d'une seule pièce.
7. Etau conforme à l'une des revendications 4 à 6, caractérisé en ce que les languettes sont réalisées sur la plaque de serrage (73').
8. Etau conforme à l'une des revendications précédentes, caractérisé en ce qu'il est prévu un dispositif de mise à niveau pour la surface de référence (50, 52), qui comporte au moins une fente (15, 16) qui s'étend sensiblement parallèlement à la surface de référence et qui est entaillée, vers son centre, par une surface latérale (54, 56) d'une plaque (3) formant le banc.
9. Etau conforme à la revendication 8, caractérisé en ce que deux fentes opposées (15, 16) sont entaillées par les deux surfaces latérales opposées (54, 56) de la plaque (3).
10. Etau conforme à la revendication 8 ou 9, caractérisé en ce que les fentes (15, 16) sont réalisées symétriquement par rapport au centre de la plaque (3) et aboutissent chacune dans un trou (17, 18).
11. Etau conforme à l'une des revendications 8 à 10, caractérisé en ce que les fentes suivent une ligne étagée et forment chacune un talon tourné vers l'extérieur (12, 13) dont chacun est placé au-dessus d'un bras tourné vers l'intérieur (24, 26) pour former une butée limitant un élargissement de la fente correspondante.
12. Etau conforme à l'une des revendications 8 à 11, caractérisé en ce que, dans les deux côtés d'une pièce inférieure (12) de la plaque (3) est engagée une vis de réglage (18,19) qui est placée en dessous du bras correspondant pour limiter le resserrement de la fente correspondante.
EP86103650A 1985-03-18 1986-03-18 Etau pour le support précis d'une pièce Expired - Lifetime EP0196544B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8501309A SE459909B (sv) 1985-03-18 1985-03-18 Skruvstycke
SE8501309 1985-03-18

Publications (2)

Publication Number Publication Date
EP0196544A1 EP0196544A1 (fr) 1986-10-08
EP0196544B1 true EP0196544B1 (fr) 1990-06-13

Family

ID=20359531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103650A Expired - Lifetime EP0196544B1 (fr) 1985-03-18 1986-03-18 Etau pour le support précis d'une pièce

Country Status (5)

Country Link
US (2) US4925168A (fr)
EP (1) EP0196544B1 (fr)
JP (1) JPH0741542B2 (fr)
DE (2) DE3671854D1 (fr)
SE (1) SE459909B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028393A1 (de) * 2000-06-13 2002-01-03 System 3R Internat Ab Vaelling Nivelliervorrichtung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US6811150B2 (en) 1999-04-15 2004-11-02 System 3R International Ab Holder for accurate positioning of a workpiece
US6755408B2 (en) * 2002-05-15 2004-06-29 Joseph M. Walter Precision vise
US6930272B1 (en) * 2004-07-06 2005-08-16 Michael P. Limano Vise for holding a workpiece on an EDM machine
ATE504395T1 (de) * 2005-09-07 2011-04-15 3R Syst Int Ab Flexible spannbacke für einen schraubstock
JP6665775B2 (ja) * 2016-12-28 2020-03-13 信越化学工業株式会社 希土類焼結磁石の固定治具
CN112276267B (zh) * 2020-10-16 2022-09-27 长春理工大学 钛合金弱刚度件精密线切割装夹装置及其工作方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028393A1 (de) * 2000-06-13 2002-01-03 System 3R Internat Ab Vaelling Nivelliervorrichtung
DE10028393B4 (de) * 2000-06-13 2005-09-01 System 3R International Ab Nivelliervorrichtung

Also Published As

Publication number Publication date
JPS61274880A (ja) 1986-12-05
EP0196544A1 (fr) 1986-10-08
JPH0741542B2 (ja) 1995-05-10
US4925168A (en) 1990-05-15
SE8501309L (sv) 1986-09-19
DE8607436U1 (de) 1986-08-07
SE459909B (sv) 1989-08-21
SE8501309D0 (sv) 1985-03-18
US5063013A (en) 1991-11-05
DE3671854D1 (de) 1990-07-19

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