EP3299124A1 - Dispositif de positionnement et de serrage de pièce à usiner - Google Patents

Dispositif de positionnement et de serrage de pièce à usiner Download PDF

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Publication number
EP3299124A1
EP3299124A1 EP16190807.4A EP16190807A EP3299124A1 EP 3299124 A1 EP3299124 A1 EP 3299124A1 EP 16190807 A EP16190807 A EP 16190807A EP 3299124 A1 EP3299124 A1 EP 3299124A1
Authority
EP
European Patent Office
Prior art keywords
positioning pin
housing
pin
bearing element
guide
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
EP16190807.4A
Other languages
German (de)
English (en)
Other versions
EP3299124B1 (fr
Inventor
Luciano Migliori
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.)
Univer SpA
Original Assignee
Univer SpA
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 Univer SpA filed Critical Univer SpA
Priority to EP16190807.4A priority Critical patent/EP3299124B1/fr
Publication of EP3299124A1 publication Critical patent/EP3299124A1/fr
Application granted granted Critical
Publication of EP3299124B1 publication Critical patent/EP3299124B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a device for positioning and clamping of workpieces, comprising a housing, an axially displaceably mounted in the housing positioning pin, wherein the positioning pin is moved by means of a drive unit.
  • One end of the positioning pin is guided out of the housing in the axial direction, the positioning pin receiving at least one clamping hook in the region of the extended end, the clamping hook being mounted so as to be movable transversely to the axial direction in the positioning pin.
  • Such a device is, for example, a substructure tensioner.
  • the positioning pin is retracted into workpiece-side receiving holes and the workpiece is tensioned following positioning by means of the clamping hook.
  • the clamping hook is moved transversely to the axial direction, so that it protrudes from an outer surface of the positioning pin and engages behind the workpiece on a side facing away from the housing.
  • a device having the features of the type mentioned, is from the document US Pat. No. 6,786,478 B2 known.
  • This device has two opposite clamping hooks, wherein the two clamping hooks each have a slot on a portion disposed within the positioning portion.
  • the respective slot accommodates a respective dowel pin formed in a central rod.
  • the central rod is designed such that it rotates during an axial displacement of the positioning pin, wherein the two clamping hooks are displaced due to the interaction of the slots with the dowel pins in the transverse direction.
  • a device for clamping workpieces comprising two opposite clamping hooks, which are pivotally mounted about a stationary mounted in the housing axis and the two clamping hooks are arranged in an open switching position of the device within the positioning pin.
  • the two clamping hooks are mounted in a guide receptacle of an axially displaceable rod, wherein upon an axial displacement of the rod, the clamping hooks due to the interaction with the guide receptacle perform a pivoting movement.
  • Object of the present invention is to provide a comparison with the device for positioning and clamping of workpieces of the type mentioned modified device that is structurally particularly simple and robust.
  • the device in the apparatus, provides that the device has a stationary in the housing stop pin, wherein a guide portion of the stop pin projects from the housing, the positioning pin receives this guide area and the guide area acts when moving the positioning pin on the clamping hook.
  • the clamping hook is disposed in an open switching position of the device completely within the positioning pin to allow the retraction of the positioning pin in a workpiece-side receiving hole.
  • the guide region has a widening in the direction of the housing cross-section. Accordingly, in the case of an axial displacement of the positioning pin in the direction of the housing, the clamping hook is displaced outward in the transverse direction, so that the clamping hook engages behind and clamps the workpiece on a side facing away from the housing.
  • the tensioning hook mounted in the positioning pin is displaced axially in accordance with the movement of the positioning pin, wherein the guide hook contacts the guide area on its side facing the guide area of the stop pin when the guide portion acts on the guide pin, the tensioning hook corresponding to the axial displacement of the positioning pin Contour of the guide area is moved in the transverse direction. Since the movement of the clamping hook follows the contour of the guide region, the transverse movement of the clamping hook can be adapted in the case of axial displacement of the positioning pin in a simple manner by a corresponding shaping of the contour.
  • the guide portion has a tapered in the direction of the housing cross-section, whereby the clamping hooks are moved to the outside with an axial displacement of the positioning pin away from the housing.
  • the tensioning hook is displaceably mounted in a guide receptacle of the guide area, for example in a guide receptacle designed as a groove.
  • the guide region is wedge-shaped. It is quite conceivable that a cross section of the guide region is formed, which widens in the direction of the housing in the transverse spatial direction and is constant in a spatial direction perpendicular thereto.
  • the guide region has a first subregion with a cross section widening in the direction of the housing and a second subregion adjoining it in the direction of the housing with a constant cross section.
  • the guide region also has, at its end facing away from the housing, a third subregion with a constant cross section adjoining the first subregion.
  • the stop pin passes through the housing.
  • the positioning pin and the stop pin are arranged coaxially. It is quite conceivable that the stop pin forms a linear guide for the positioning. As a result, a precise positioning of the positioning pin and the stop pin and a particularly good and stable guidance of the positioning pin is ensured in a simple manner.
  • the clamping hook on the side facing the guide area in the direction of the housing has tapered cross-section.
  • clamping hook allows a transverse displacement during axial displacement of the positioning pin, even with a stop pin with a constant cross-section.
  • the device has in an advantageous embodiment, acting on the tensioning hook return means, in particular designed as a mechanical spring return means, wherein a movement of the clamping hook transversely outward against a restoring force of the Return means takes place.
  • the return means is designed such that it limits the displaceability of the clamping hook to the outside.
  • the return means causes the clamping hook is returned to its original position when the guide portion is not affected.
  • the tensioning hook is arranged completely in its initial position within the positioning pin.
  • the positioning pin receives two preferably opposite clamping hooks, in particular two identically designed clamping hooks.
  • the respective clamping hook has a recess, in particular on the side facing the housing or on the side facing away from the housing, the recess receiving the return means.
  • the return means is designed as a helical spring, band spring, compression spring, tension spring or shaft ring.
  • the stopper pin passes through the spring or the ring in the axial direction in the closed state of the device. It is quite conceivable that a portion of the respective clamping hook penetrates the spring or the ring in the axial direction.
  • two opposite ends of the return means are formed angled to the transverse direction, for example in the axial direction, and the one end is arranged in a recess of a clamping hook and the other end in a recess of the other clamping hook.
  • the return means acts on the opposite ends on a transposition of the clamping hook transversely outward in the opposite direction on the clamping hooks on the opposite ends.
  • the respective recess is formed adjacent to a wall of the positioning pin, preferably the wall covers the respective recess. As a result, the return means against external forces and against contamination is particularly well protected.
  • this has an axially displaceable bearing element, wherein the bearing element cooperates with the drive unit and the positioning pin is detachably connected to the bearing element.
  • This embodiment makes it possible to remove the positioning pin in a particularly simple manner and / or replace it with another positioning pin.
  • the device is particularly flexible use, for example, a positioning of the device against a differently shaped positioning, for example, a positioning with a different diameter, with little effort and time to be exchanged.
  • the device has connecting means, for example screws, for connecting the positioning pin and the bearing element.
  • connecting means for example screws
  • the bearing element and / or the positioning pin for insertion into the corresponding corresponding component, namely the positioning pin or the bearing element has.
  • the bearing element receives the stop pin. It is quite conceivable that the stop pin forms a linear guide for the bearing element.
  • the device may be designed such that the positioning pin or the bearing element is connected via a toggle joint arrangement with the drive unit, in particular with a piston rod of the drive unit. This prevents that the device in case of failure of the drive unit at opens an exciting state.
  • the toggle lever assembly has a lever with a guide groove, wherein the bearing element or the positioning pin are slidably mounted in the guide groove.
  • the guide groove is formed as a slot and a bearing pin of the bearing element or the positioning pin passes through the slot.
  • the bearing element or the positioning pin In addition to the connection of the bearing element or the positioning pin to the toggle joint assembly is also secured by the bearing pin, the bearing element or the positioning pin against rotation about an axial axis.
  • the stop pin is fixedly mounted in the housing by means of another bearing pin. This makes it possible to replace the stop pin against a stop pin with a differently shaped guide area.
  • the other bearing pin passes through an elongated hole formed in the axial direction of the bearing element or of the positioning pin.
  • the penetrating bearing pin also serves as a guide for the bearing element or for the positioning pin.
  • the drive unit can be formed for example by a pneumatic cylinder with a piston rod.
  • the clamping hook contacts a guide surface of the guide region, in particular the clamping hook has a receptacle for the guide region.
  • This receptacle may be formed, for example, as a groove.
  • the Fig. 1 to 4 show a device 1 for positioning and clamping of workpieces 24, in particular of body parts in the automotive industry, in various states, wherein the Fig. 2 the device 1 in an open state, the FIG. 4 the device 1 in a closed or exciting state and the Fig. 3 show the device 1 in an intermediate state between the open state and the closed state.
  • the device 1 has a multi-part housing 2.
  • two housing halves 33, 34 are connected to one another by means of screws 36 and a housing cover 35 is connected to the housing halves 33, 34 in the region of the front side by means of screws 37.
  • the housing 2 has an axially displaceable in the region of the housing cover 35 positioning pin 3, wherein the positioning pin 3 is connected by means designed as a screw connecting means 21 with a likewise axially displaceable bearing element 10.
  • the bearing element 10 is connected via a toggle joint arrangement 12, 13 with a drive unit 11, wherein the drive unit 11 is formed by a pneumatic cylinder 27 with a piston rod 23.
  • the toggle joint arrangement 12, 13 has a two-armed lever 12 with a slot formed as a guide groove 14, wherein the bearing pin 15 of the bearing element 10 passes through the guide groove 14, whereby the bearing element 10 slidably mounted in the Z direction in the guide groove 14 and a rotation of the bearing element 10 is prevented by an axial axis.
  • the lever 12 is in the region of an end facing away from the bearing pin 15 pivotally connected to a rod 13 of the toggle lever assembly 12, 13 in the area one end of the rod 13 connected.
  • an axis 26 passes through the lever 12 and the rod 13.
  • the rod 13 is pivotally mounted via an axis 28 in the axially movable piston rod 23 of the drive unit 11.
  • the lever 12 is pivotally mounted in the housing 2 by means of a further, fixedly mounted in the housing 2 bearing pin 17.
  • the rod 13 and the associated with this lever 12 form the toggle lever assembly 12, 13, which is located at clamped workpiece 24 and thus in a closed state of the device 1 in a position in which, without the action of the drive unit 11, an opening of the device 1 is prevented.
  • This condition is in the Fig. 4 shown.
  • the positioning pin 3 of the device 1 is used for positioning or centering of the workpiece 24, preferably a sheet.
  • the positioning pin 3 is retracted into a workpiece-side receiving hole, which is in particular circular.
  • the positioning pin 3 receives two opposite and identically formed clamping hooks 6 in the region of the extended end, the two clamping hooks 6 being mounted transversely to the axial direction Z in the positioning pin 3.
  • the device 1 has a stop pin 4 stationarily mounted in the housing 2, a guide area 5 of the stop pin 4 protruding from the housing 2 and the positioning pin 3 receives this guide area 5.
  • the guide portion 5 acts on the two clamping hooks 6, whereby when moving the positioning pin 3 in the Z direction towards the housing 2, the clamping hooks 6 are displaced transversely outwards in opposite directions and in a closed state of the device. 1 protrude from a wall 9 of the positioning pin 3, whereby the clamping hooks 6 a on the device. 1 arranged workpiece 24 engage behind on a side facing away from the housing 2 and thus the workpiece 24 is clamped against a connected to the housing 2 support plate 25.
  • the support plate 25 is connected by means of screws 38 with the housing cover 35 of the device 1.
  • the device 1 can be adapted to the dimensions, in particular to the strength of the workpiece to be clamped 24.
  • the stopper pin 4 passes through the housing cover 35 of the device 1, wherein the stopper pin 4 is fixedly mounted in the housing 2 by means of another bearing pin 16.
  • the positioning pin 3 and the stop pin 4 are arranged coaxially, wherein a portion of the stop pin 4 is disposed within the positioning pin 3 and forms a linear guide for the positioning pin 3.
  • the bearing element 10 receives the stop pin 4, wherein the stop pin 4 also forms a linear guide for the bearing element 10.
  • the bearing element 10 has an elongated hole 29 formed in the axial direction Z, wherein the other bearing pin 16 passes through the slot 29.
  • the respective clamping hook 6 contacts a guide surface 18 of the guide region 5, wherein the guide region 5 extends in the direction of the Housing 2 has widening cross section, wherein the cross section widens in the direction of the housing 2 in the transverse spatial direction X, as in particular the Fig. 2 to 4 can be seen.
  • the guide region 5 in a vertical spatial direction Y, has a constant cross-section, as in particular the FIGS. 5 and 6 can be seen.
  • This shape of the guide region 5 ensures that the clamping hooks 6 are displaced transversely outwards in the direction of the housing 2 when the positioning pin 4 is displaced.
  • the guide region 5 has a first partial region 30 with a cross-section widening linearly in the direction of the housing 2 and a second partial region 31 adjoining it in the direction of the housing with a constant cross-section.
  • the two clamping hooks 6 each have on the side facing the guide portion 5 a in the direction of the housing 2 linearly tapering cross-section, wherein the shape of the tapered portion of the clamping hooks 6 corresponds to the shape of the first portion 30 of the guide portion 5, whereby a particular good and in particular rotation-safe guidance of the clamping hooks 6 is ensured by the guide portion 5.
  • the guide region 5 at its end facing away from the housing 2 has a third partial region 32 of constant cross section adjoining the first partial region 30, wherein in an opened state of the device 1, a partial region of the respective clamping hook 6 over the entire surface on the third partial region 32 of the guide region 5 is present.
  • the device 1 has a return means 7 acting on the clamping hooks 6, wherein a movement of the clamping hooks 6 transversely outside against a restoring force of the return means 7 takes place.
  • the return means 7 is designed as a helical spring, wherein the respective clamping hook 6 on a side facing away from the housing 2 a recess 8 in Has the shape of a half circular ring and these recesses 8 record the return means 7, wherein a portion of the respective clamping hook passes through the return means 7 in the axial direction.
  • the respective recess 8 is formed adjacent to the wall 9 of the positioning pin 3 such that the wall 9, the recess 8 regardless of the state of the device 1 completely covers, as in particular the Fig. 7 and 8th can be seen. As a result, the return means 7 is protected against external influences. Furthermore, the stopper pin 4 passes through the return means 7 in the closed state of the device 1.
  • FIGS. 14 to 16 and FIGS. 17 to 20 each show a further exemplary embodiment of the device 1, which differs essentially from the other exemplary embodiments due to the nature of the return means 7 and the mounting of the return means 7 in the clamping hooks 6.
  • the return means 7 is annular, with two portions of the return means 7 overlapping each other and the respective portion comprises an end 39 formed in the axial direction Z, the end 39 of the one portion being formed in an axial recess 40 in the area of the semicircular recess 8 a tensioning hook 6 and the end 39 of the other portion in a corresponding axial recess 40 of the other clamping hook 6 is arranged.
  • the recesses 40 are formed as bores.
  • Such an embodiment of the return means 7 and the storage of the return means 7 in the clamping hooks 6 is particularly suitable for smaller displacement paths of the clamping hooks, typically displacement ranges in the range of 0 to 1.5 mm, between the open state and the closed state of the device. 1
  • FIGS. 17 to 20 illustrated embodiment differs from the embodiment according to the FIGS. 14 to 16 essentially by the nature of the return means 7, which is substantially annular, but has no overlapping portions.
  • Such an embodiment of the return means 7 and the storage of the return means 7 in the clamping hook 6 is particularly suitable for larger displacement paths of the clamping hooks, typically shifts in the range up to 10 mm, between the open state and the closed state of the device. 1
  • the releasable connection of the positioning pin 3 with the bearing element 10 makes it possible to replace the positioning pin 3 in a simple manner, for example, to exchange with a positioning pin 3 with a different geometric shape, with other dimensions and / or with another embodiment of the clamping hooks 6. Exemplary are in the Fig. 11 two different embodiments of the positioning pin 3 shown.
  • the bearing element 10 has two projecting from a connecting surface of the bearing element 10 bolts 20, said bolts 20 are inserted into corresponding receiving holes of the positioning pin 3 , Furthermore, a portion of the housing 2 is slightly protruding from the connecting surface of the bearing member 10, so that insertion and alignment of the positioning pin 3 is facilitated.
  • FIGS. 12 and 13 each show an embodiment of the device 1 in a closed state, in which state the workpiece 24 between the two clamping hooks 6 and the housing-side support plate 25 is stretched.
  • the two embodiments differ in this case by the outer dimensions of the positioning pin 3, as well as the shape of the clamping hooks 6, wherein the clamping hooks 6 of the first embodiment block-like and the clamping hooks 6 of the second embodiment are formed angled.
  • the support plate 25 is detachably connected to the housing 2 of the device 1, in particular screwed, whereby a simple replacement of the support plate 25 is possible.
  • the device 1 in the region of the positioning pin 3 between the housing cover 35 and the positioning pin 3 in a recess
  • the device 2 arranged sealing means 19 in the form of an O-ring, wherein the positioning pin 3 passes through the O-ring.
  • the device 1 has a spring device mounted in the housing 2 22, which forms a resilient stop for the rod 13 of the toggle joint assembly 12, 13 during clamping of the workpiece 24 according to its strength.
  • the spring device 22 on a split spring receptacle with acting on relatively movable receiving parts of the spring receiving mechanical springs.
  • means for connecting the two receiving parts are provided under the action of the springs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Jigs For Machine Tools (AREA)
EP16190807.4A 2016-09-27 2016-09-27 Dispositif de positionnement et de serrage de pièce à usiner Active EP3299124B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16190807.4A EP3299124B1 (fr) 2016-09-27 2016-09-27 Dispositif de positionnement et de serrage de pièce à usiner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16190807.4A EP3299124B1 (fr) 2016-09-27 2016-09-27 Dispositif de positionnement et de serrage de pièce à usiner

Publications (2)

Publication Number Publication Date
EP3299124A1 true EP3299124A1 (fr) 2018-03-28
EP3299124B1 EP3299124B1 (fr) 2019-07-24

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ID=57121030

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Application Number Title Priority Date Filing Date
EP16190807.4A Active EP3299124B1 (fr) 2016-09-27 2016-09-27 Dispositif de positionnement et de serrage de pièce à usiner

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322617A2 (fr) * 1987-12-25 1989-07-05 Kabushiki Kaisha Kosmek Dispositif de serrage du type à cylindre
US6364300B1 (en) 1999-05-24 2002-04-02 Smc Kabushiki Kaisha Clamp apparatus
US20040070130A1 (en) * 2002-07-10 2004-04-15 Welker Bearing Company Locating assembly having an extendable clamping finger
US6902159B2 (en) 2003-08-21 2005-06-07 Btm Corporation Sealed pin locating and clamping apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322617A2 (fr) * 1987-12-25 1989-07-05 Kabushiki Kaisha Kosmek Dispositif de serrage du type à cylindre
US6364300B1 (en) 1999-05-24 2002-04-02 Smc Kabushiki Kaisha Clamp apparatus
US20040070130A1 (en) * 2002-07-10 2004-04-15 Welker Bearing Company Locating assembly having an extendable clamping finger
US6786478B2 (en) 2002-07-10 2004-09-07 Welker Bearing Company Locating assembly having an extendable clamping finger
US6902159B2 (en) 2003-08-21 2005-06-07 Btm Corporation Sealed pin locating and clamping apparatus

Also Published As

Publication number Publication date
EP3299124B1 (fr) 2019-07-24

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