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
  • B25B5/12—Arrangements for positively actuating jaws using toggle links
  • B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
  • B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
  • B23Q3/183—Centering devices
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/26—Chucks or sockets with centering means
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/27—Separate chuck-actuating power source
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/33—Member applies axial force component

Definitions

• the present invention relates to the field of centering and clamping tools for handling parts to be fixed in position such as sheets and, more particularly, a centering and clamping tool of at least one part comprising a through and adjusted passage.
• a centering and clamping tool of at least one part comprising a through and adjusted passage.
• for said tool of the type comprising a pilot member carried at the end of a casing, clamping members and means for driving the clamping members between a centering position in which they are deleted in the pilot member and a plurality of clamping positions in which the clamping members protrude outside the pilot member and bear on the workpiece.
• Known clamping tools generally include a hydraulic or pneumatic cylinder allowing actuation of a clamping member such as a clamping arm which is pivotally driven between an active clamping position on the workpiece and an inactive position.
• a clamping member such as a clamping arm which is pivotally driven between an active clamping position on the workpiece and an inactive position.
• Such a tool may also include a pilot which is introduced into a passage formed in the part to be treated, which makes it possible to center the tool correctly on the part.
• a clamping tool is known, one clamping arm of which abuts against the part to be clamped by the pivoting drive of this clamping arm. This pivoting drive of the clamping arm between the loosening position and the clamping position is obtained using an articulated linkage mounted on a rod driven in linear movement by a jack.
• the point of contact of the clamping arm on the workpiece is relatively distant from the centering point of the tool on said workpiece, which can cause a certain imbalance or requires a more complex structure of the tool.
• WO-A-9635547 discloses a device for indexing a part through a hole in this part and comprising a sleeve having an upper face forming a support for the part, a piston mounted in the sleeve for slide under the effect of drive means between a retracted position 1 inside the sleeve and a deployed position in which it extends projecting from the upper bearing face of the sleeve by an end portion forming a pin indexing, a clamping jaw of the part on the upper support face of the sleeve, movably mounted on the centering pin and jaw control means comprising a slide mounted in an axial bore of the piston and having one end forming cam.
• control means are constituted by a slide J - * »mounted in an axial bore of the piston to slide under the effect of the drive means between a first position in which it ensures the locking of the jaw in its active position by means of an active part forming a cam driving in pivoting the clamping jaws towards said active position and a second position in which it releases the locking of this jaw by controlling the pivoting of the clamping jaws towards the inactive position.
• the drive means comprise inter alia a first return spring disposed between the piston and the sleeve to return the piston to its deployed position and a second return spring arranged between the sleeve and the slide to return the slide to its unlocked position of the jaw.
• the present invention relates to a tool for centering and clamping at least one part to be fixed in position and comprising a through passage and adjusted for said tool, of the type comprising a pilot member worn on the end of a casing having an upper face forming a support for said part, clamping members and means for driving the members clamping between a centering position in which the clamping members are obliterated inside the pilot member and a plurality of clamping positions in which the clamping members protrude outside the pilot member and resting on the workpiece, characterized in that the drive means are arranged to simultaneously pivot and translate said clamping members between the centering position and a clamping position.
• the clamping members are correctly positioned on the part to be fixed during the centering step carried out by the positioning of the pilot member through the through and adjusted passage of the part and the pivoting drive of the clamping members allows the projecting drive of said clamping members outside of the pilot member and their lowering on either side of the pilot member to bear on the part to be fixed in position, the drive in translation simultaneous said clamping members causing the clamping of the part to be fixed in position against the end of the housing, on the upper face of said housing forming support.
• it ensures perfect deployment of the clamping members projecting from the pilot member and a plurality of clamping positions is obtained on the part to be fixed.
• a first end of the clamping members coming into contact with the part to be fixed has abutment means, such as a finger, capable of coming to bear against the edge of the through passage and adjusted to the part to be fixed when 1 actuation simultaneously in pivoting and in translation of the clamping members from the centering position and towards a clamping position of the part to be fixed.
• abutment means such as a finger
• the clamping members are constituted by two levers articulated around a median axis to form a deformable X, each lever having a first end having stop means and the second end opposite to said stop means is connected to the drive means so that, under the effect of said drive means, said second ends of the levers are movable in translation , in approach and spacing from each other, the first ends of said levers then being driven in pivoting and in translation simultaneously due to the deformation of the X formed by said levers.
• the drive means consist of a slide controlled by a jack and two connecting rods, one end of which is articulated at one end of the slide and the other end of which is connected to the second end of a lever so as to transform the translational travel of the slide in a linear travel of 1 spacing and approximation of the second ends of the levers.
• the levers are bent around their articulation axis and their second end is pivotally mounted around an axis mounted movable in translation in a guide groove of the casing, the end of the connecting rods articulated on said second lever ends also being pivotally mounted around said axes, so that the translational drive of the slide causes, by means of the connecting rods, a translational drive of the axes in the groove which causes the second ends of the levers to approach or move apart and , therefore, due to the deformation of the levers, the simultaneous pivoting and translation of the first ends of the levers.
• the clamping members are erased in the pilot member which has a slot for this purpose.
• This slot communicates the interior of the clamping and centering tool with the exterior.
• the stop means have a clearance clearance such that, in the clamping position, said stop means close the slot of the pilot member thus protecting the interior of said clamping and centering tool, particularly against weld splashes which can enter said tool during the machining of the fixed part. This advantageously avoids all the risks of fouling of the mechanism of the clamping members and of the drive means.
• a tool is thus obtained whose centering and clamping on a part to be fixed are reliable, the clamping members acting on the part to be fixed at the level of the through passage through which they have been engaged both to allow the clamping of said part and to allow the protection of said tool against fouling during welding.
• Figure 1 shows a side sectional view of a centering and tightening tool according to the invention, in the centering position
• FIG. 2 shows a side sectional view of a tool according to Figure 1 in the clamping position.
• a centering and tightening tool 1 comprises a casing 2 at the end of which is mounted a pilot member 3 suitable for allowing the centering of the tool 1 on a part P to be fixed by passing through a through and adjusted passage of said part P.
• the casing 2 has an upper surface 2 'forming a support for the part P.
• the clamping members 5 comprise at a first end 5 ′ a clamping finger 5 ′ a and are arranged to be housed in the pilot member 3 in the centering position of the tool 1 (see FIG. 1).
• the casing 2 also contains the means for driving the clamping members 5.
• the tightening members are constituted by bent levers 5, articulated around a median axis 4 so as to form a deformable X.
• the levers 5 are positioned in the casing 2 so that their first end 5 'projects outside the casing 2 and, in the centering position of the tool 1, is housed in a slot in the pilot member 3 and their second end 5 '' is housed in the casing 2.
• the second 5 '' ends of the levers 5 are pivotally mounted respectively around an axis 6 mounted movable in translation in a rectilinear guide groove 7 of the casing 2, so that a drive in translation of the axes 6 in the groove 7 of the casing 2 brings the second ends 5 '' of the levers 5 closer together and apart in a linear stroke and, consequently, due to the deformation of the X formed by the levers 5, the drive simultaneously in pivoting and in translation first ends 5 'of the levers 5 which, from the centering position where they are erased in the pilot member 3, are driven protruding from said pilot member 3 and lower on either side of said pilot member to clamp the workpiece P to be fixed.
• the translational drive of the second 5 '' ends of the levers 5 is caused by two articulated connecting rods 8 on said second ends 5 ' 1 via the axes 6 of the second ends 5''of each lever 5.
• first connecting rod 8 is pivotally connected to a second end 5 '' of a first lever 5 via a first axis 6 and one end of the second connecting rod 8 is pivotally connected at the second end 5 '' of the second lever 5 via the second axis 6.
• the other end of the connecting rods 8 is pivotally mounted about an axis 9 at one end of a slide 11 controlled by a jack 10 so that the translation drive of the piston of the jack 10 causes the
• the connecting rods 8 substantially form a V so that the articulation axes 6 are brought together one of
• An element 12 can be provided which, connected on the one hand to the casing 2 and on the other hand to a connecting rod 8, limits the movement of the connecting rods 8 and contributes to the good mechanical strength of the assembly .
• the jack 10 Upon actuation of the jack 10, the latter causes the slide 11 to move in linear movement and causes the V formed by the connecting rods to be deformed.
• the jack 10 drives the ends of the connecting rods 8 pivotally mounted about the axis 9 so that the other ends of the connecting rods 8 pivotally mounted on the axes 6, cause the latter in translation in the groove 7.
• the connecting rods 8 align with each other along the groove 7 ( Figure 2) causing the spacing of the axes 6 in the groove 7 and, therefore, the spacing of the second ends 5 '' of the levers 5.
• This spacing being produced by a drive in translation of the second 5 '' ends of the levers 5 in the same plane, their first ends 5 'are driven simultaneously in pivoting and in translation so as to abut and bear against the edge of the passage through, adjusted and formed in the part P to be fixed in position, and to tighten said part P to be fixed against the end of the casing 2 (see FIG. 2).
• the ends of the connecting rods are preferably driven. 8 pivotally mounted around the axis 9 slightly beyond the line of the three points is slightly beyond the groove 7. It is thus prohibited a backward movement of the tool 1 and this, until a new source of energy drives tool 1 to the reverse position.
• the pilot member 3 can be of the mobile type relative to the casing 2 and retractable. In this case, the positioning of the pilot member 3 through the through passage of the part P to be fixed can be achieved by drive means common to the clamping members 5, for example by actuation of the jack 10 .
• Said pilot member 3 can also be fixed projecting relative to said casing 2 and in this case it is the assembly which is driven in displacement in order to position the pilot member 3 through the through passage of the part P.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Jigs For Machine Tools (AREA)
• Earth Drilling (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9499080

Family Applications (1)

Country Status (7)

Families Citing this family (19)

Family Cites Families (10)

• 1996
  • 1996-12-24 FR FR9615946A patent/FR2757437B1/fr not_active Expired - Fee Related
• 1997
  • 1997-12-23 WO PCT/FR1997/002411 patent/WO1998028110A1/fr not_active Application Discontinuation
  • 1997-12-23 AU AU56697/98A patent/AU5669798A/en not_active Abandoned
  • 1997-12-23 EP EP97953004A patent/EP0954412A1/de not_active Ceased
  • 1997-12-23 TR TR1999/01434T patent/TR199901434T2/xx unknown
  • 1997-12-23 CA CA002275958A patent/CA2275958A1/fr not_active Abandoned
  • 1997-12-23 US US09/331,735 patent/US6186517B1/en not_active Expired - Fee Related

Non-Patent Citations (1)

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