WO2009025457A2 - Hydraulic chuck for machine tools - Google Patents

Hydraulic chuck for machine tools Download PDF

Info

Publication number
WO2009025457A2
WO2009025457A2 PCT/KR2008/004501 KR2008004501W WO2009025457A2 WO 2009025457 A2 WO2009025457 A2 WO 2009025457A2 KR 2008004501 W KR2008004501 W KR 2008004501W WO 2009025457 A2 WO2009025457 A2 WO 2009025457A2
Authority
WO
WIPO (PCT)
Prior art keywords
claw
bolt
armature
chuck housing
present
Prior art date
Application number
PCT/KR2008/004501
Other languages
French (fr)
Other versions
WO2009025457A3 (en
Inventor
Hyun Soo Choi
Hui Jae Jang
Original Assignee
Hyun Soo Choi
Hui Jae Jang
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 Hyun Soo Choi, Hui Jae Jang filed Critical Hyun Soo Choi
Publication of WO2009025457A2 publication Critical patent/WO2009025457A2/en
Publication of WO2009025457A3 publication Critical patent/WO2009025457A3/en

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
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16233—Jaws movement actuated by oblique surfaces of a coaxial control rod
    • B23B31/16254—Jaws movement actuated by oblique surfaces of a coaxial control rod using fluid-pressure means to actuate the gripping means
    • B23B31/16258—Jaws movement actuated by oblique surfaces of a coaxial control rod using fluid-pressure means to actuate the gripping means using mechanical transmission through the spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/022—Balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/124—Screws

Definitions

  • the present invention relates to a hydraulic chuck for machine tools.
  • a hydraulic chuck installed in a machine tool to hold and rotate a manufactured product, by inserting an armature in between a claw; for holding the product; and a chuck housing, which extends the durability of the machine tool by minimizing the abrasion of the claw.
  • a hydraulic chuck means equipment for fixating products; manufactured by rotation of machine tools; which fixates the products from internal and external diameter with a numerous claws protruding in a radial shape.
  • the previous hydraulic chuck formed of chuck housing and claws comprises of; a product insertion hole (1) is formed in the center of the body to insert products; a chuck housing (3) with formed outwardly penetrating claw guide incision (2) in the directions 0° 120° 240° from the product insertion hole (1); a claw (4) connected to claw guide incision (2) above, which moves to the center or the outward of the chuck housing (3); and a formation, where completely manufactured product is held and released by a claw (4) sliding back and forth by a hydraulic cylinder (not illustrated) and a wedge plunger (5) which connects to the inside of the chuck housing (3).
  • the present invention is formed in three main parts including; a chuck housing (10) with bolt holes (13), all on the side of claw guide incision (12), where the claw guide incision (2) is formed to penetrate outwards in the directions 0° 120° 240° from the cylindrical product insertion hole (1) formed in the center of the body; a claw (20) capable of moving toward the center and outward of the chuck housing (10) above, by joining of a stepped pulley (21)and the claw guide incision (12) above; an armature (30) formed of iron inserted in between the stepped pulley (21) and the claw guide incision (12); and an armature control (40) formed of bolt 1 (41), a hard ball (42), and bolt 2 (43) consecutively installed into the bolt hole (13).
  • the formation of the present invention minimizes the abrasion of the claw (20) and maximizes the durability.
  • the formation of the present invention has effects of minimizing the abrasion of the claw and maximizing the durability of the claw.
  • bolts are installed in two layers on the bolt holes on both sides of claw guide incisions, enabling adjustment of the gaps between claws, armatures and claw guide incisions, so that even a small gap can be eliminated.
  • Figure 1 is a partial disassemble perspective view of the hydraulic chuck for machine tool.
  • Figure 2 is an overall perspective view of the present invention
  • FIG. 3 is a partial disassemble perspective view of the present invention
  • the present invention relates to a hydraulic chuck for machine tools comprising of an armature installed in between a claw and a chuck housing, which minimizes the abrasion of the claw, extending the durability of the machine tool.
  • FIG 2 is a perspective view of the present invention
  • figure 3 is a disassemble perspective view of the present invention
  • figure 4 and 5 are cross sectional views of the present invention.
  • a claw (20) is attached to a claw guide incision (12) formed in a radial shape from the center of a cylindrical chuck housing (10), and an armature (30) is inserted in between the claw (20) and the claw guide incision (12).
  • Bolt 1 (41), a hard ball (42), and bolt 2 (43) are consecutively installed into the bolt hole (13) formed on both sides of the claw guide incision (12).
  • the formation of the chuck housing (10); which works as the body of the present invention; is almost identical to previously used chuck housings, where the shape overall is cylindrical and a product insertion hole (11) is formed in the center.
  • the claw guide incision (2) is formed to penetrate outwards in the directions 0° 120° 240°from the cylindrical product insertion hole (11) above.
  • the main difference between the chuck housing of the present invention and the previous chuck housing is that numerous bolt holes (13) are formed on both sides of the claw guide incision (12) above.
  • Bolt 1 (41), a hard ball (42), and bolt 2 (43) are consecutively installed into the bolt hole (13), to adjust the gap in between the armature (30) and the claw (20).
  • the advisable number of bolt holes (13) above are four on each sides, that is a total of eight formed reciprocally.
  • the number of bolt holes (13) is adjustable accordingly to the size of the hydraulic chuck.
  • the form of the claw (20); inserted into the claw guide incision (12); is almost identical to the commonly used claws, except for the stepped pulley (21), which is formed at a lower level than the previous ones.
  • the stepped pulley (21) above is formed at a lower level to allow insertion of an armature; described further on; in between the claw (20) and the claw guide incision
  • the formation of the armature (30); inserted in between the claw (20) and the claw guide incision (12) of the chuck housing (10) above; is in the shape of ' ⁇ ', and is apiece of metal, where a total of three armatures (30) are horizontally inserted in between the claw guide incisions (12).
  • the armature (30) above is formed of a metallic substance, and is heated to have a lower solidity compared to the chuck housing (10) and the claw (20), so that the armature is abraded by the friction caused between the chuck housing (10) and the claw (20).
  • the armature control (40) is in the form, where bolt 1 (41) and the bolt hole (13) are connected so that the stepped pulley (21) of the claw (20) is positioned nearly in contact with the armature (30). [33] Then, a hard ball (42) is installed unto the upper division of bolt 1 (41), and bolt 2 (43) is installed, which fixes the bolt 1 (41) in position allowing the armature (30) and the claw (20) to keep an even interval.
  • the gap between the armature (30) and the claw (20) is adjusted by attaching bolt 1 (41) to the bolt holes (13) formed on both sides of claw guide incisions (12), and the hard ball (42) and bolt 2 (43) are consecutively attached to complete assembling of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Gripping On Spindles (AREA)

Abstract

The present invention relates to a hydraulic chuck for machine tools, where an armature is inserted in between a claw; which holds and rotates manufactured products; and a chuck housing, which extends the durability of the machine tool by minimizing the abrasion of the claw. The present invention is formed in three main parts including; a chuck housing (10) with bolt holes (13), all on the side of claw guide incision (12), where the claw guide incision (2) is formed to penetrate outwards in the directions 0° 120° 240° from the cylindrical product insertion hole (1) formed in the center of the body; a claw (20) capable of moving toward the center and outward of the chuck housing (10) above, by joining of a stepped pulley (21)and the claw guide incision (12) above; an armature (30) formed of iron inserted in between the stepped pulley (21) and the claw guide incision (12); and an armature control (40) formed of bolt 1 (41), a hard ball (42), and bolt 2 (43) consecutively installed into the bolt hole (13). The formation of the present invention minimizes the abrasion of the claw (20) and maximizes the durability. The formation of the present invention has effects of minimizing the abrasion of the claw and maximizing the durability of the claw. Also, bolts are installed in two layers on the bolt holes on both sides of claw guide incisions, enabling adjustment of the gaps between claws, armatures and claw guide incisions, so that even a small gap can be eliminated. Therefore, the manufacturing cost can be reduced as wastage of expensive claws is avoided, and it has effects of allowing precise manufacturing.

Description

Description
HYDRAULIC CHUCK FOR MACHINE TOOLS
Technical Field
[1] The present invention relates to a hydraulic chuck for machine tools. In more detail, it relates to a hydraulic chuck installed in a machine tool to hold and rotate a manufactured product, by inserting an armature in between a claw; for holding the product; and a chuck housing, which extends the durability of the machine tool by minimizing the abrasion of the claw.
[2] Generally, a hydraulic chuck means equipment for fixating products; manufactured by rotation of machine tools; which fixates the products from internal and external diameter with a numerous claws protruding in a radial shape.
[3]
Background Art
[4] The previous hydraulic chuck formed of chuck housing and claws, as illustrated, comprises of; a product insertion hole (1) is formed in the center of the body to insert products; a chuck housing (3) with formed outwardly penetrating claw guide incision (2) in the directions 0° 120° 240° from the product insertion hole (1); a claw (4) connected to claw guide incision (2) above, which moves to the center or the outward of the chuck housing (3); and a formation, where completely manufactured product is held and released by a claw (4) sliding back and forth by a hydraulic cylinder (not illustrated) and a wedge plunger (5) which connects to the inside of the chuck housing (3).
[5]
Disclosure of Invention Technical Problem
[6] In the previous hydraulic chuck, outer surface of the claw guide incision was slid in contact with another surface causing abrasion, and the abrasion formed a gap in between the claw and the claw guide incision, making precise manufacture impossible.
[7] Also, when a gap is formed in between the claw and the claw guide incision, the previous claw has to be replaced with a new one, causing wastage of an expensive claw, and increasing the manufacturing cost as a result.
[8] Small gaps continuously form in between the claw and the claw guide incision before it reaches the replacement period, causing problems in manufacturing precisely.
[9]
Technical Solution
[10] The present invention is formed in three main parts including; a chuck housing (10) with bolt holes (13), all on the side of claw guide incision (12), where the claw guide incision (2) is formed to penetrate outwards in the directions 0° 120° 240° from the cylindrical product insertion hole (1) formed in the center of the body; a claw (20) capable of moving toward the center and outward of the chuck housing (10) above, by joining of a stepped pulley (21)and the claw guide incision (12) above; an armature (30) formed of iron inserted in between the stepped pulley (21) and the claw guide incision (12); and an armature control (40) formed of bolt 1 (41), a hard ball (42), and bolt 2 (43) consecutively installed into the bolt hole (13). The formation of the present invention minimizes the abrasion of the claw (20) and maximizes the durability. [H]
Advantageous Effects
[12] The formation of the present invention has effects of minimizing the abrasion of the claw and maximizing the durability of the claw.
[13] Also, bolts are installed in two layers on the bolt holes on both sides of claw guide incisions, enabling adjustment of the gaps between claws, armatures and claw guide incisions, so that even a small gap can be eliminated.
[14] Therefore, the manufacturing cost can be reduced as wastage of expensive claws is avoided, and it has effects of allowing precise manufacturing
[15]
Brief Description of the Drawings
[16] Figure 1 is a partial disassemble perspective view of the hydraulic chuck for machine tool.
[17] Figure 2 is an overall perspective view of the present invention
[18] Figure 3 is a partial disassemble perspective view of the present invention
[19] Figure 4 and figure 5 are cross sectional views of the present invention
[20]
Best Mode for Carrying Out the Invention
[21] The present invention relates to a hydraulic chuck for machine tools comprising of an armature installed in between a claw and a chuck housing, which minimizes the abrasion of the claw, extending the durability of the machine tool.
[22] The Best mode for operating the present invention is described below in regard to illustrations:
[23] Figure 2 is a perspective view of the present invention, figure 3 is a disassemble perspective view of the present invention, and figure 4 and 5 are cross sectional views of the present invention. As illustrated, a claw (20) is attached to a claw guide incision (12) formed in a radial shape from the center of a cylindrical chuck housing (10), and an armature (30) is inserted in between the claw (20) and the claw guide incision (12). Bolt 1 (41), a hard ball (42), and bolt 2 (43) are consecutively installed into the bolt hole (13) formed on both sides of the claw guide incision (12). [24] The formation of the chuck housing (10); which works as the body of the present invention; is almost identical to previously used chuck housings, where the shape overall is cylindrical and a product insertion hole (11) is formed in the center. The claw guide incision (2) is formed to penetrate outwards in the directions 0° 120° 240°from the cylindrical product insertion hole (11) above. [25] The main difference between the chuck housing of the present invention and the previous chuck housing is that numerous bolt holes (13) are formed on both sides of the claw guide incision (12) above. Bolt 1 (41), a hard ball (42), and bolt 2 (43) are consecutively installed into the bolt hole (13), to adjust the gap in between the armature (30) and the claw (20). [26] The advisable number of bolt holes (13) above are four on each sides, that is a total of eight formed reciprocally. The number of bolt holes (13) is adjustable accordingly to the size of the hydraulic chuck. [27] The form of the claw (20); inserted into the claw guide incision (12); is almost identical to the commonly used claws, except for the stepped pulley (21), which is formed at a lower level than the previous ones. [28] The stepped pulley (21) above is formed at a lower level to allow insertion of an armature; described further on; in between the claw (20) and the claw guide incision
(12). [29] The formation of the armature (30); inserted in between the claw (20) and the claw guide incision (12) of the chuck housing (10) above; is in the shape of 'Λ ', and is apiece of metal, where a total of three armatures (30) are horizontally inserted in between the claw guide incisions (12). [30] The armature (30) above is formed of a metallic substance, and is heated to have a lower solidity compared to the chuck housing (10) and the claw (20), so that the armature is abraded by the friction caused between the chuck housing (10) and the claw (20). [31] Therefore, when the armature (30) is abraded after a long term use, only the armature is needed to be replaced, and it becomes unnecessary to replace other expensive parts including the chuck housing (10) and the claw (20). [32] The role of the armature control (40) above is adjusting the gap between the claw
(20) and the armature (30) to prevent formation of gaps between the claw (20) and the chuck housing (10). The armature control (40) is in the form, where bolt 1 (41) and the bolt hole (13) are connected so that the stepped pulley (21) of the claw (20) is positioned nearly in contact with the armature (30). [33] Then, a hard ball (42) is installed unto the upper division of bolt 1 (41), and bolt 2 (43) is installed, which fixes the bolt 1 (41) in position allowing the armature (30) and the claw (20) to keep an even interval.
[34] When a gap is formed in between the armature (30) and the claw (20) due to the abrasion of the armature (30) after using for a certain amount of time, bolt 1 (41) is lowered after bolt 2 (43) and the hard ball (42) are removed, then the hard ball (42) and bolt 2 (43) are consecutively reconnected to adjust the gap. After being used for a long term, only the armature (30) is separately replaced allowing a long term use of the claw (20).
[35] The assembling steps of the present invention in the form described above is, first, three armatures (30) are inserted in between the claw guide incisions (12) of the chuck housing (10), and at the same time, a stepped pulley (21) of the claw (20) is installed to each claw guide incisions (12).
[36] Then, the gap between the armature (30) and the claw (20) is adjusted by attaching bolt 1 (41) to the bolt holes (13) formed on both sides of claw guide incisions (12), and the hard ball (42) and bolt 2 (43) are consecutively attached to complete assembling of the present invention.
[37]

Claims

Claims
[1] The present invention relates to a hydraulic chuck for machine tools in a cylindrical form comprising of; a product insertion hole (11) formed in the center of the body for inserting products; a claw guide incision (2) formed to penetrate outwards in the directions 0° 120° 240° from the cylindrical product insertion hole (11) above; a chuck housing (10) with bolt holes (13) on both sides of the claw guide incisions (12); a claw (20) capable of moving toward the center and outward of the chuck housing (10) above by joining of a stepped pulley (21)and the claw guide incision (12) above; an iron armature (30) inserted in between the stepped pulley (21) and the claw guide incision (12); and an armature control (40) formed of bolt 1 (41), a hard ball (42), and bolt 2 (43) consecutively installed into the bolt hole (13).
[2] The device of claim 1, where the armature (30) is formed of a metallic substance, and is heated to have a lower solidity compared to the chuck housing (10) and the claw (20), so that the armature is abraded by the friction caused between the chuck housing (10) and the claw (20).
PCT/KR2008/004501 2007-08-21 2008-08-04 Hydraulic chuck for machine tools WO2009025457A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0084027 2007-08-21
KR1020070084027A KR100770994B1 (en) 2007-08-21 2007-08-21 Hydraulic Chuck for Machine Tools

Publications (2)

Publication Number Publication Date
WO2009025457A2 true WO2009025457A2 (en) 2009-02-26
WO2009025457A3 WO2009025457A3 (en) 2009-04-23

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ID=38689169

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/004501 WO2009025457A2 (en) 2007-08-21 2008-08-04 Hydraulic chuck for machine tools

Country Status (2)

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KR (1) KR100770994B1 (en)
WO (1) WO2009025457A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104551060A (en) * 2014-12-24 2015-04-29 中发输配电设备（平湖）有限公司 Stepped chuck clamp
KR20200035980A (en) * 2017-07-28 2020-04-06 가부시키가이샤 기타가와 뎃꼬쇼 Chuck mechanism
US11141798B2 (en) * 2017-12-01 2021-10-12 Kitagawa Iron Works Co., Ltd. Chuck and method for manufacturing same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101008853B1 (en) * 2008-07-28 2011-01-19 주식회사 삼천리기계 A Hydraulic Chuck
KR100927106B1 (en) * 2009-06-05 2009-11-13 은광산업 주식회사 Device for auto centering having slide hydraulic chuck
KR101248997B1 (en) * 2012-08-13 2013-04-02 칸워크홀딩 주식회사 A chuck for clamping machine work
KR101451914B1 (en) * 2013-12-19 2014-10-22 칸워크홀딩 주식회사 A Reinforce Part Of A Chuck for clamping machine work
KR101544910B1 (en) * 2014-05-07 2015-08-17 칸워크홀딩 주식회사 A Chuck for clamping machine work
KR20160001434A (en) * 2014-06-27 2016-01-06 칸워크홀딩 주식회사 A Chuck for clamping machine work
CN108180828A (en) * 2017-12-28 2018-06-19 中核北方核燃料元件有限公司 A kind of heavy water reactor element end plate detecting tool

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5015003A (en) * 1988-08-03 1991-05-14 Kennametal Inc. Top jaw assembly with replaceable work holding pads
US5052254A (en) * 1990-01-23 1991-10-01 Goins Glen R Lathe jaw securing device
DE19637329A1 (en) * 1996-09-13 1998-03-19 Josef Steinberger Chuck for high speed machine tool, especially lathe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618209A (en) * 1984-06-22 1986-01-14 Kitagawa Tekkosho:Kk Chuck for machine tool
KR200402498Y1 (en) 2005-09-23 2005-12-01 주식회사 삼천리기계 Hydraulic Chuck Have a Clearance Prevention Structure Of Jaw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015003A (en) * 1988-08-03 1991-05-14 Kennametal Inc. Top jaw assembly with replaceable work holding pads
US5052254A (en) * 1990-01-23 1991-10-01 Goins Glen R Lathe jaw securing device
DE19637329A1 (en) * 1996-09-13 1998-03-19 Josef Steinberger Chuck for high speed machine tool, especially lathe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104551060A (en) * 2014-12-24 2015-04-29 中发输配电设备（平湖）有限公司 Stepped chuck clamp
KR20200035980A (en) * 2017-07-28 2020-04-06 가부시키가이샤 기타가와 뎃꼬쇼 Chuck mechanism
EP3646974A4 (en) * 2017-07-28 2020-07-22 Kitagawa Iron Works Co., Ltd Chuck mechanism
US10926338B2 (en) 2017-07-28 2021-02-23 Kitagawa Ironworks Co., Ltd. Chuck mechanism
KR102574866B1 (en) * 2017-07-28 2023-09-06 가부시키가이샤 기타가와 뎃꼬쇼 chuck mechanism
US11141798B2 (en) * 2017-12-01 2021-10-12 Kitagawa Iron Works Co., Ltd. Chuck and method for manufacturing same

Also Published As

Publication number Publication date
KR100770994B1 (en) 2007-10-29
WO2009025457A3 (en) 2009-04-23
KR20070091256A (en) 2007-09-10

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