EP1375068B1 - Dispositif de serrage et centrage - Google Patents

Dispositif de serrage et centrage Download PDF

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Publication number
EP1375068B1
EP1375068B1 EP03405338A EP03405338A EP1375068B1 EP 1375068 B1 EP1375068 B1 EP 1375068B1 EP 03405338 A EP03405338 A EP 03405338A EP 03405338 A EP03405338 A EP 03405338A EP 1375068 B1 EP1375068 B1 EP 1375068B1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping device
center
spindle
bearing plate
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
EP03405338A
Other languages
German (de)
English (en)
Other versions
EP1375068A3 (fr
EP1375068A2 (fr
Inventor
Dieter Mosig
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.)
Hemo-Werkzeugbau Dieter Mosig
Original Assignee
Hemo-Werkzeugbau Dieter Mosig
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 Hemo-Werkzeugbau Dieter Mosig filed Critical Hemo-Werkzeugbau Dieter Mosig
Publication of EP1375068A2 publication Critical patent/EP1375068A2/fr
Publication of EP1375068A3 publication Critical patent/EP1375068A3/fr
Application granted granted Critical
Publication of EP1375068B1 publication Critical patent/EP1375068B1/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
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
    • B25B1/125—Arrangements for positively actuating jaws using screws with provision for disengagement with one screw perpendicular to the jaw faces
    • 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
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/103—Arrangements for positively actuating jaws using screws with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw

Definitions

  • the present invention relates to a center clamping device for centric clamping of workpieces to be machined on an NC-controlled machine tool with two clamping jaws, which are movable in opposite directions via at least one threaded spindle, wherein the spindle is mounted in a centrally on the table of the machine tool mountable base plate.
  • a defined zero point is extremely important for the accuracy of machining.
  • a corresponding workbench which has perforations in a predetermined grid, which serve for the attachment of corresponding clamping devices.
  • clamping devices are known in which a clamping jaw is fixedly arranged on a base plate and the corresponding base plate can be fastened on the table of the machine tool, wherein the clamping device is usually designed so that the fixed jaw comes to rest on a predetermined zero point of the grid.
  • both jaws are arranged to be movable symmetrically with respect to the center.
  • the zero point of the coordinate is set equal to the point which lies exactly between the two clamping jaws.
  • the coordinate zero point is thus in the middle of the clamped workpiece.
  • center tensioners are known. They have the structure shown in the introduction to the description.
  • the two slidably mounted jaws are stored here directly or indirectly on the aforementioned spindle and the displacement of the two jaws against each other exactly corresponds to the displacement on the spindle.
  • the center spanner is denoted by 1.
  • Their main components are to be mounted on a machine bed base plate 2, on which a bearing plate 3 is fixed, on which in turn the two jaws 4 are slidably guided.
  • the spindle 5 is mounted on the two spindle nuts 7 are symmetrical to the center of the clamping device movable.
  • the operative connection between the spindle 5 and the spindle nut 7 and the corresponding clamping jaw 4 in each case produces a tensioning lever 6.
  • a pivot pin 8 passes through the tensioning lever 6 and is held pivotably secured in the bearing plate 3.
  • the base plate 2 consists of a frame construction 10.
  • This frame construction 10 which is preferably made here from a part, has two longitudinal struts 11 and two end crossbars 12, and a central cross bar 13.
  • the spindle 5 is each mounted in a radial bearing bush 15.
  • the spindle 5 is held against displacement in the central cross bar 13 in a double-sided thrust bearing bush 16.
  • the spindle 5 has a left-hand thread on one side of the double-sided axial bearing bush 16 and a right-handed thread on the other side.
  • the spindle 5 is also provided with a drive pin 18.
  • the preferably integrally manufactured spindle 5 has a central thickened shoulder 19. This annular shoulder 19 is mounted in the double-sided thrust bearing 16.
  • On the two sections of the spindle 5 left and right of the double-sided thrust bearing bushing 16 is a freely movable spindle nut 7 is disposed on the spindle 5 each.
  • the bearing plate 3 has a similar structure as the base plate 2. It also has two longitudinal struts 20 and two end cross-members 21. Also here, a central cross bar 22 may be present. Between the two longitudinal struts 20 remains a passage opening 23 whose width corresponds at least to the diameter of the clamping lever 6. If the mentioned central transverse rung 22 is present, this subdivides the lead-through opening 23 into two identically sized, mirror-inverted through-openings.
  • the two end crossbars 21 are provided on the inside with an outwardly directed bevel 24. In the bevel 24 opens a slightly upward from the outside bore 25.
  • the two longitudinal struts 20 of the bearing plate 3 are interspersed with a plurality of lying in a line with respect to the central transverse rung symmetrically arranged bearing bores 26.
  • This bearing bores 26 can be the already mentioned pivot pin 8 insert and secure.
  • the pivot pin 8 form the pivot axis of the two clamping lever 6.
  • the bearing plate is provided with longitudinal struts 20, which in Area in which they are interspersed by the pivot pin 8, deposited from the outside inward and thus made thinner. In these solutions, the pivot pins 8 are held with corresponding locking rings.
  • the two longitudinal struts 20 are not diluted here and the pivot pins 8 have an outwardly resting head and at least one annular groove 27, in which a corresponding ball spring pin 28 engages lockingly.
  • the bearing plate 3 either from below ( FIG. 4 ) or from above ( FIGS. 2 and 3 ) are screwed firmly to the base plate 2.
  • the clamping jaw 4 consists of a metal block 30 with an approximately trapezoidal cross-sectional shape. This is in the side view according to the FIG. 1 most clearly visible.
  • the clamping jaw 4 slides with a flat bed guide 31 on the bearing plate 3.
  • the clamping jaw 4 is slightly wider than the bearing plate 3, so that lateral bearing cheeks 34 extended over the flat bed guide 31 away down are present. At this bearing cheeks 34 slide strips 33 are screwed by means of screws 32.
  • the clamping strips 33 thus engage under the upper region of the bearing plate 3.
  • the clamping jaw has a central receptacle 35 which is open from below and which serves to receive a joint head of the tensioning lever 6. This receptacle 35 goes down into an extension 36 over.
  • the Extension 36 corresponds in width to the width of the openings 23 for the passage of the tensioning lever 6 through the bearing plate 3.
  • the clamping jaws 4 may be additionally provided with threaded holes 37, which serve for the attachment of special adapted to be machined workpieces clamping plates.
  • the clamping lever 6 is provided with the one integrally formed spherical condyle, which is flattened above and according to the receptacle 35 is designed as a cylindrical bore.
  • the pivot lever has a cylindrical shaft 40 which is penetrated by a pivot pin bearing bore 41 and has a countersink for easy insertion of the pivot pin 8.
  • a constriction 43 is present, the complete deflection of the Clamping lever 6 allows. Accordingly, the clamping jaw 4 is provided below the receptacle 35 for the condyle 42 with a conical enlargement 37.
  • the lower end of the clamping lever 6 is widened in the area below the bearing plate 3 and fork-shaped.
  • This fork 45 is configured with two slots open at the bottom, which has a fork-shaped plug connection 44 (FIG. FIG. 1 ) form.
  • the fork 45 surrounds the spindle nuts 7, which have lateral bearing pin 46 and thus allow the clamping lever 6 form-fitting réellestecken on the spindle nuts 7.
  • This type of connection is imperative because the distance between the pivot pin 8 and the bearing pin 46 is changed in the displacement of the spindle nut 7 on the spindle 5.
  • the immersion depth of the condyle 42 in the receptacle 35 changes from the FIG.
  • a central longitudinal groove 9 is incorporated in the bearing plate 3. This allows on the one hand between the two clamping levers 6 to arrange a central protective cover 50, which is adapted in size to the clamping area. At the height of the protective cover 50 9 opening holes are provided in the bearing plate 3 from the side into the longitudinal groove in which corresponding ball pressure pins 51 are inserted, which engage in corresponding Arretismesansenkungen to the lateral longitudinal edges of the protective cover 50 in the correct position.
  • the outer regions between the transverse struts 21 and the clamping jaws 4 can be closed.
  • a spring-loaded pin 54 engages latching.
  • the spring pressure pins 54 are this time arranged in the clamping jaws 4 and press.
  • pendulum jaws as in the FIG. 6 shown, insert.
  • a clamping jaw 60 is provided without a variable contact surface
  • the second jaw 61 is provided with adjustable contact surfaces 63.
  • the lateral outer sliding surfaces of the clamping jaws which come to rest on the outside of the bearing plate 3, provided with a certain parallaxity of 2 °.
  • a lateral displacement is still not possible because the slideways 64 in the central region of the receptacle 35 have the exact minimum size corresponding to the width of the bearing plate in the guide area, so that the clamping jaw altogether only allows a pivoting movement of +/- 2 °.
  • pendulum jaws are known per se, but have not usually been used in center tensioning devices. Especially with castings, however, usually the Vermassung from the center ago and accordingly pendulum jaws are extremely useful even with center clamping devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Jib Cranes (AREA)

Claims (11)

  1. Dispositif de serrage central (1) pour le serrage central de pièces à usiner sur une machine-outil à commande numérique comprenant deux mâchoires de serrage (4), qui sont mobiles l'une par rapport à l'autre au moyen d'au moins une broche filetée, la broche (5) étant logée dans une plaque d'assise (2) de façon centrée sur la table de la machine-outil, caractérisé en ce qu'au-dessus de la plaque de base (2) est disposée une plaque de palier (3) reliée ainsi de façon fixe, qui est traversée par deux leviers de serrage disposés mobile symétriquement au centre du dispositif, lesquels leviers sont maintenus de façon mobile et pivotante par un boulon pivotant (8) maintenu dans la plaque de palier (3), chaque levier de serrage (6) étant relié par une extrémité à un écrou de broche (7) mobile sur la broche filetée (5), caractérisé en ce que chaque levier de serrage (6) s'engage sur l'autre extrémité de façon mobile dans une mâchoire de serrage (4) glissant de façon coulissante sur la plaque de palier (3).
  2. Dispositif de serrage central selon la revendication 1, caractérisé en ce que la plaque d'assise (2) à la forme d'un cadre (10, 11, 12) avec un échelon transversal (13) centré et la broche filetée (5) est logée à l'intérieur en traversant la plaque d'assise (2) dans la longueur.
  3. Dispositif de serrage central selon la revendication 1, caractérisé en ce que les leviers de serrage (6) présentent sur l'extrémité dirigée vers la broche (5) un assemblage emboîtable (44) en forme de fourche, au moyen duquel les leviers de serrage (6) peuvent être emboîtés sur les écrous de broche (7) qui sont dotés de deux tenons de palier (46) latéraux.
  4. Dispositif de serrage central selon la revendication 1, caractérisé en ce que les leviers de serrage (6) sont dotés sur l'extrémité dirigée vers la mâchoire de serrage (4) respective d'une tête articulée (42) sphérique et formée d'une seule pièce sur le levier de serrage, et les mâchoires de serrage présentent un logement dans lequel la tête articulée (35) d'un levier de serrage s'engage de façon coulissante et pivotante, mais sans jeu.
  5. Dispositif de serrage central selon la revendication 1, caractérisé en ce que la plaque de palier (3) a la forme d'un cadre (20, 21, 22) et est dotée de plusieurs perçages de palier (26) traversant ce cadre, perçages dans lesquels les boulons pivotants (8) des leviers de serrage (6) peuvent être introduits pour modifier la zone de serrage.
  6. Dispositif de serrage central selon la revendication 1, caractérisé en ce que les mâchoires de serrage (4) sont fixées de façon coulissante sur la plaque de palier (3) avec un guide plat (31) entourant partiellement et peuvent être repoussées côté extrémité après l'enlèvement du boulon pivotant (8) respectif à partir de la plaque de palier (3).
  7. Dispositif de serrage central selon la revendication 1, caractérisé en ce que la plaque de palier (3) en forme de cadre présente sur le côté dirigé vers les mâchoires de serrage (4) une rainure longitudinale centrée qui est plus large que les ouvertures de passage (23), par laquelle les deux leviers de serrage (6) sont guidés, et qui sert à l'insertion du couvercle de protection (50, 52).
  8. Dispositif de serrage central selon les revendications 5 et 7, caractérisé en ce qu'un couvercle de protection (50) correspondant à la zone de serrage choisie est inséré entre les deux leviers de serrage (6).
  9. Dispositif de serrage de centre selon la revendication 8, caractérisé en ce que le couvercle de protection (50) est maintenu bloqué au moyen de broches de pression à bille disposées dans la plaque de palier (3) et agissant sur les arêtes latérales du couvercle de protection (51).
  10. Dispositif de serrage central selon la revendication 7, caractérisé en ce que dans la zone comprise entre une mâchoire de serrage (4) et l'extrémité de la plaque de palier (3) est inséré un couvercle de protection final (52), qui appuie au moyen d'au moins une broche de pression à ressort (54), qui est disposée dans la mâchoire de serrage (4), sur la surface, située au-dessous de la mâchoire de serrage (4), du couvercle de protection final (52).
  11. Dispositif de serrage central selon la revendication 1, caractérisé en ce qu'au moins l'une des deux mâchoires de serrage (4) est conçue comme mâchoire pendulaire (61).
EP03405338A 2002-05-31 2003-05-15 Dispositif de serrage et centrage Expired - Lifetime EP1375068B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9162002 2002-05-31
CH9162002 2002-05-31

Publications (3)

Publication Number Publication Date
EP1375068A2 EP1375068A2 (fr) 2004-01-02
EP1375068A3 EP1375068A3 (fr) 2008-10-08
EP1375068B1 true EP1375068B1 (fr) 2010-08-04

Family

ID=29716488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405338A Expired - Lifetime EP1375068B1 (fr) 2002-05-31 2003-05-15 Dispositif de serrage et centrage

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EP (1) EP1375068B1 (fr)
AT (1) ATE476277T1 (fr)
DE (1) DE50312940D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH699112A2 (de) 2008-07-11 2010-01-15 Dieter Mosig Spannvorrichtung mit Mitteln zur Spülung.
CH708548A1 (de) * 2013-09-02 2015-03-13 Dieter Mosig Zentrumsspanneinrichtung.
CN111843868B (zh) * 2020-06-22 2021-12-10 长沙嘉百精密机械有限公司 一种使用并联臂实现异形工件夹持的虎钳
CN112139545A (zh) * 2020-09-17 2020-12-29 朱安学 一种连续生产钣金加工系统
CN113878378A (zh) * 2021-10-09 2022-01-04 安徽奥普汽车制动系统有限公司 一种汽车制动配件加工用自动定心装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398579A1 (fr) * 1977-07-29 1979-02-23 Cuillery Lucien Etau d'etabli universel
US4475607A (en) * 1981-12-11 1984-10-09 Walker-Neer Manufacturing Co. Inc. Clamp and insert for clamping drilling tubulars

Also Published As

Publication number Publication date
EP1375068A3 (fr) 2008-10-08
EP1375068A2 (fr) 2004-01-02
ATE476277T1 (de) 2010-08-15
DE50312940D1 (de) 2010-09-16

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