WO2002058870A1 - Element de maintien et dispositif de mandrin - Google Patents

Element de maintien et dispositif de mandrin Download PDF

Info

Publication number
WO2002058870A1
WO2002058870A1 PCT/JP2002/000527 JP0200527W WO02058870A1 WO 2002058870 A1 WO2002058870 A1 WO 2002058870A1 JP 0200527 W JP0200527 W JP 0200527W WO 02058870 A1 WO02058870 A1 WO 02058870A1
Authority
WO
WIPO (PCT)
Prior art keywords
gripping
gripping member
axial direction
gripper
driving
Prior art date
Application number
PCT/JP2002/000527
Other languages
English (en)
Japanese (ja)
Inventor
Yutaka Tajima
Original Assignee
Izumi Corporation
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 Izumi Corporation filed Critical Izumi Corporation
Publication of WO2002058870A1 publication Critical patent/WO2002058870A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B23B31/201—Characterized by features relating primarily to remote control of the gripping means
    • B23B31/202—Details of the jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/1253—Jaws movement actuated by an axially movable member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16158—Jaws movement actuated by coaxial conical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/136—Springs

Definitions

  • the present invention relates to a gripper and a chuck device, and more particularly to a structure of a gripper suitable for being attached to a main shaft of a machine tool.
  • various chuck devices are used in a machine tool to attach and fix a work (workpiece) or a tool to the machine.
  • a plurality of slits (slits) are formed around an axis in a portion near a tip of a metal cylindrical body, and a tapered (conical) is formed on the outer periphery of the tip with respect to the axial direction.
  • a tapered (conical) driving surface which is fitted on the outside of the collet shaft and is in sliding contact with the driven surface and inclined with respect to the axial direction.
  • a collect check provided with a driving cylinder is known.
  • the driving cylinder is further covered by a cylindrical outer cylinder, and a nut member attached to the outer cylinder abuts on the tip of the collet shaft to determine the position.
  • the above-mentioned collect shaft is configured so that a workpiece, a tool, or the like is gripped on a grip surface, which is an inner peripheral surface thereof, by bending a portion close to the distal end in a radial direction. It is difficult to increase the gripping accuracy of the workpiece or tool, etc., because the workpiece or tool, etc., is gripped in a slightly inclined state. There is a problem that a work or a tool may be misaligned depending on a gripping state between the surface and the gripping target.
  • a gripper of the present invention includes a driven surface inclined with respect to the axial direction for receiving a driving force by slidingly contacting a driving surface inclined with respect to the axial direction.
  • a support body having a plurality of pillars protruding in the axial direction and distributed in a circumferential direction around the axis, and the driven surface is configured to be movable in a radial direction at least within a predetermined range.
  • a plurality of gripping members are provided, and the gripping members are regulated on both sides in the circumferential direction by the two pillars adjacent in the circumferential direction.
  • the gripping member is only restricted on both sides in the circumferential direction by the support pillar portion, it is possible to deal with gripping objects having different shapes only by replacing the gripping member. Further, since the gripping member can be formed separately from the support, each part can be formed in a simple shape, and the manufacturing cost can be reduced.
  • the gripping member has an outer gripping type that has a gripping surface facing inward in the radial direction and grips an object to be gripped from the outer side in the radial direction, and a gripping surface facing outward in the radial direction. It is conceivable to use a lining type that grips the object to be gripped from the radial inside.
  • the support portion and the gripping member have a margin at least in a radial direction. It is preferable that they are mutually fitted in the circumferential direction. According to this means, since the column and the gripping member are engaged with each other in the circumferential direction, the rigidity of the column and the gripping member can be increased even when a small-diameter chuck device is configured. This makes it possible to form a volume that can be secured, thereby improving gripping accuracy.
  • a fitting recess for accommodating a part of the support column with a margin in the radial direction is provided on a side surface of the gripping member facing in the circumferential direction.
  • the holding member is configured to be able to be inserted into the support from the distal end side of the support portion toward the base side. This makes it easy to fit and remove the gripping member.
  • an urging means for urging the gripping member toward the driving surface Since the gripping member is urged toward the driving surface by the urging means, the gripping member is separated from the object to be gripped in a state where the driving unit releases the gripping member.
  • the urging means is configured to generate an urging force by engaging with the support portion and the gripping member.
  • the above-mentioned urging means is constituted by an elastic member fixed to the support portion, and two gripping members having the center of the elastic member fixed to the support portion and both ends of the elastic member disposed on both sides are subjected to a force. It is desirable to be constituted so that it may be urged.
  • the elastic member for example, a torsion spring is used.
  • the center winding part of the torsion spring is fixed to the support, and the two gripping members arranged on both sides of the support are urged together by the legs extending to both sides from the winding. Ultimately it is composed.
  • the biasing means is incorporated inside the outer shape of the gripping member and the support portion in order to make the gripping tool compact.
  • a groove may be formed in the holding member ⁇ post portion, and a biasing means may be built in the groove.
  • the gripping member has an end surface extending in the radial direction (that is, a direction perpendicular to the axial direction) on a side of the axial direction on which the driven surface is pressed during the gripping operation. It is composed of a flat surface.
  • a guide structure is conceivable in which this end face is configured to be slidable in the radial direction with the guide surface of the guide means (also formed of a plane orthogonal to the axial direction).
  • the guide means is constituted by an end member fixed to a tip of the support portion. This end member has a guiding function in the radial direction of the gripping member and a force par function for closing at least a part of the gap between the gripping members (for example, to prevent chips in the cutting process from entering the gap between the adjacent gripping members). ) Can be performed together.
  • the end member serving as the guide means is fixed to the tip of the support portion, the conventional outer cylinder is not required, and it is not necessary to attach a nut member to the outer cylinder.
  • the conventional nut member also functions as a guide for positioning the tip of the collet, but the screwing structure between the outer cylinder and the nut member makes it difficult to increase the surface accuracy of the guide surface of the nut member.
  • the end member fixed to the distal end of the support portion of the present invention can provide a guide surface fixed with high precision to the support.
  • the end member is constituted by a plate-shaped material (end plate) provided with a fixing structure for the support portion and an opening through which an object to be gripped held by the gripping member is passed. Is desirable.
  • FIG. 1 is a longitudinal sectional view showing a structure of an embodiment of a chuck device according to the present invention.
  • FIG. 2 is a schematic perspective view showing the structure of the gripper in the embodiment.
  • FIG. 3 is a partial cross-sectional view showing a fitting structure between a support portion and a gripping member in the same embodiment.
  • FIG. 1 is a longitudinal sectional view showing the structure of the chuck device of the present embodiment
  • FIG. 2 is a schematic perspective view showing the structure of a gripper (a portion corresponding to a conventional collet shaft) of the present embodiment.
  • the present embodiment has a gripper 10 shown in FIG. 2 and a cylindrical drive cylinder 20 into which the gripper 10 is inserted. As shown in FIG.
  • a gripper 10 includes a support 11 screwed to a main shaft component 21 of a machine tool or the like with a screw portion 11a, and an axis of the support 11.
  • a conical driven surface 12 a that is inclined with respect to the direction of the axis A so as to face slightly backward.
  • a conical driving surface 20 a inclined with respect to the direction of the axis A is formed so as to be in sliding contact with the driven surface and slightly forward. Have been.
  • the driving member 20 is moved back and forth in the direction of the axis A by a driving mechanism provided in the main spindle of the work, similarly to the above-mentioned conventional collet chuck.
  • the support 11 is formed in a substantially cylindrical shape as a whole, the screw portion 11a is formed on the outer peripheral surface of the rear end, and a plurality of the support members 11 are formed in the circumferential direction around the axis A near the front end (3 in the illustrated example). ) Opening 11A.
  • a plurality (three in the illustrated example) of struts l ib distributed in the circumferential direction are formed so as to project forward in the direction of the axis A.
  • An end plate fixing hole 11 c penetrating in the direction of the axis A is formed in each pillar 11 b.
  • a panel shaft through hole 11 d is formed in the direction of the axis A, and the panel shaft 14 is inserted into the panel shaft through hole 11 d.
  • the panel shaft 14 is fixed by a set screw 15 screwed into a panel shaft fixing hole 11 ⁇ drilled in the radial direction at the base of the column lib.
  • the panel shaft 14 is fixed so as to pass through an outer groove 11 e formed on the outer periphery near the base of the support 11 b, and the panel shaft 14 is fixed in the outer groove 11 e.
  • Reference numeral 14 is inserted into the center winding portion 16 a of the torsion spring 16.
  • the gripping member 12 includes the above-described driven surface 12a, an end surface 12b formed of a smooth surface facing forward in the axis A direction, and a cylindrical gripping surface 12X facing radially inward. Are formed.
  • the holding member 12 has a pair of fitting recesses 1 2 provided on both sides in the circumferential direction, which are fitted in the circumferential direction with a margin in the radial direction with respect to the support portion 11 b. c is formed.
  • one gripping member 12 is fitted with two radially adjacent columns 11b with a margin in the radial direction.
  • the gripping member 12 is restricted in a play-fit state on both sides in the circumferential direction by the two columns 11 b fitted on both sides in the circumferential direction. They are not allowed to move beyond the.
  • the holding member 12 is formed with an arc-shaped panel receiving groove 12 d that opens rearward in the direction of the axis A.
  • the leg portion 16b of the torsion spring 16 extends from the outer groove 11e provided in the support portion 11b as shown in FIG. I have.
  • the leg 16b of the torsion spring 16 presses the outer peripheral side surface of the panel receiving groove 12d radially outward, whereby the gripping member 12 is constantly urged radially outward. It is in a state of being left.
  • a rear end 12 e that is reduced in diameter and protrudes rearward in the direction of the axis A is formed at the rear end of the gripping member 12 in the direction of the axis A, and is inserted into the support 11.
  • the rear end portion 12e is formed with a conical guide inclined surface 12 # that is inclined with respect to the direction of the axis A and is slightly rearward in the direction of the axis A.
  • the end plate 13 is provided with a work through hole 13a formed at the center and a plurality of screw holes 13b formed at positions corresponding to the support portions l ib.
  • the end plate 13 is screwed into the screw hole 13 b with the end of the fixing screw 17 (see Fig. 1) inserted into the end plate fixing hole 11 c of the column 11 b from the rear in the direction of the axis A.
  • the support is fixed to the support 1 lb.
  • the screw hole 13b is a through hole, the outer surface side (forward in the axial direction) of the end plate 13 may be formed as a closed screw hole.
  • the drive cylinder 20 is moved forward in the axis A direction. Then, the driving surface 20a presses the driven surface 12a radially inward, and the gripping member 12 moves radially inward, so that the workpiece W is gripped by the gripping surface 12X of the gripping member 12. can do.
  • the gripping member 12 has its end surface 12 b pressed against the inner surface of the end plate 13 by the pressing action of the drive surface 20 a of the drive cylinder 20 and the elastic action of the torsion spring 16. It moves in the radial direction in the state where it was set.
  • the end surface 12 b of the gripping member 12 is guided with high precision in the radial direction along the inner surface of the end plate 13, so that the one side of the gripping surface 12 X with respect to the work W is prevented. Further, it is possible to improve the gripping accuracy of the workpiece W, that is, to reduce the misalignment of the workpiece W in the gripping state and the inclination angle of the axis of the workpiece W with respect to the axis A direction.
  • the gripping member 12 can be fitted to the front end of the support 11 (the portion where the column 11 is formed) from the front in the axial direction, and can be removed toward the front in the axial direction. It is configured to be able to. Therefore, the gripping member 12 can be easily exchanged only by loosening the fixing screw 17 and removing the end plate 13. Further, by changing the gripping member 12 to one having a gripping surface 12X having a different position or shape, it is possible to cope with various shapes and dimensions of the workpiece W.
  • the chuck device of the present invention is not limited to the illustrated example described above, and it is needless to say that various changes can be made without departing from the gist of the present invention.
  • the gripping member 12 is moved inward in the radial direction by the movement of the drive cylinder member 20 forward in the axial direction, and the work W is gripped from the outside.
  • the gripping member may move outward in the radial direction to grip the work from the inside.
  • the shape of the gripping member can be appropriately designed according to the shape of the work, and the number of the gripping members may be any number of 2 or more.
  • INDUSTRIAL APPLICATION FIELD As described above, according to the present invention, it is possible to easily cope with the present invention by replacing only the gripping member according to the shape of the work. In addition, improvement of gripping accuracy by gripping members can be expected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping On Spindles (AREA)

Abstract

L'invention concerne un dispositif de mandrin à élément de maintien, comprenant un élément de maintien (10) et un matériau de tube d'entraînement (20) dans lequel ledit élément de maintien (10) est inséré. Cet élément de maintien (10) comporte par ailleurs un support (11), trois éléments de fixation (12) fermement insérés dans la partie avant axiale du support (11) et une plaque d'extrémité (13) fermement fixée à la partie avant axiale du support (11). Une rainure de logement de ressort curviligne (12d), débouchant dans la partie arrière A axiale, est formée dans l'élément de fixation (12), et la partie pied (16d) d'un ressort de torsion (16) exerce une pression sur la surface latérale périphérique externe de la rainure de logement de ressort (12d) vers une partie externe radiale, de façon à toujours solliciter l'élément de fixation (12) vers la partie externe radiale. De ce fait, étant donné que l'élément de fixation (12) peut facilement être remplacé, le dispositif de mandrin peut facilement être utilisé pour maintenir des objets, tels que des pièces de différentes formes et des outils, avec une grande précision.
PCT/JP2002/000527 2001-01-24 2002-01-24 Element de maintien et dispositif de mandrin WO2002058870A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-16163 2001-01-24
JP2001016163A JP2002219605A (ja) 2001-01-24 2001-01-24 把持具及びチャック装置

Publications (1)

Publication Number Publication Date
WO2002058870A1 true WO2002058870A1 (fr) 2002-08-01

Family

ID=18882585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/000527 WO2002058870A1 (fr) 2001-01-24 2002-01-24 Element de maintien et dispositif de mandrin

Country Status (2)

Country Link
JP (1) JP2002219605A (fr)
WO (1) WO2002058870A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003060A1 (fr) 2005-07-05 2007-01-11 Luigi Ghezzi Mandrin de serrage et dispositif de dressage cylindrique
US7665976B2 (en) 2001-07-19 2010-02-23 Hitachi, Ltd. High pressure fuel pump for internal combustion engine
CN107253018A (zh) * 2017-05-04 2017-10-17 西安优耐特容器制造有限公司 一种稀有金属薄壁管的开孔方法
CN111251030A (zh) * 2020-03-30 2020-06-09 重庆红江机械有限责任公司 喷油泵体水平装夹通用夹具
CN111906599A (zh) * 2020-08-07 2020-11-10 谢祥松 一种卫浴配件金属管接头制造工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5340773B2 (ja) * 2009-03-16 2013-11-13 シチズンホールディングス株式会社 ガイドブシュ及びガイドブシュ装置
EP3851233A1 (fr) * 2020-01-16 2021-07-21 Schaublin SA Ensemble collet flexible à rigidité radiale limitée

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55138009U (fr) * 1979-03-23 1980-10-01
JPH01175108U (fr) * 1988-05-31 1989-12-13
JPH0495105U (fr) * 1990-12-26 1992-08-18
JP2000158216A (ja) * 1998-11-20 2000-06-13 Tsugami Tool:Kk コレットチャック及びチャック装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55138009U (fr) * 1979-03-23 1980-10-01
JPH01175108U (fr) * 1988-05-31 1989-12-13
JPH0495105U (fr) * 1990-12-26 1992-08-18
JP2000158216A (ja) * 1998-11-20 2000-06-13 Tsugami Tool:Kk コレットチャック及びチャック装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665976B2 (en) 2001-07-19 2010-02-23 Hitachi, Ltd. High pressure fuel pump for internal combustion engine
WO2007003060A1 (fr) 2005-07-05 2007-01-11 Luigi Ghezzi Mandrin de serrage et dispositif de dressage cylindrique
CN107253018A (zh) * 2017-05-04 2017-10-17 西安优耐特容器制造有限公司 一种稀有金属薄壁管的开孔方法
CN111251030A (zh) * 2020-03-30 2020-06-09 重庆红江机械有限责任公司 喷油泵体水平装夹通用夹具
CN111251030B (zh) * 2020-03-30 2021-10-26 重庆红江机械有限责任公司 喷油泵体水平装夹通用夹具
CN111906599A (zh) * 2020-08-07 2020-11-10 谢祥松 一种卫浴配件金属管接头制造工艺

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