WO2021001929A1 - 液圧式クランプ装置及びカラー部材 - Google Patents

液圧式クランプ装置及びカラー部材 Download PDF

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Publication number
WO2021001929A1
WO2021001929A1 PCT/JP2019/026316 JP2019026316W WO2021001929A1 WO 2021001929 A1 WO2021001929 A1 WO 2021001929A1 JP 2019026316 W JP2019026316 W JP 2019026316W WO 2021001929 A1 WO2021001929 A1 WO 2021001929A1
Authority
WO
WIPO (PCT)
Prior art keywords
walled cylindrical
cylindrical portion
thick
thin
hydraulic
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.)
Ceased
Application number
PCT/JP2019/026316
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕平 伊藤
山下　徹
幸太郎 湊
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.)
Kuroda Precision Industries Ltd
Original Assignee
Kuroda Precision Industries Ltd
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 Kuroda Precision Industries Ltd filed Critical Kuroda Precision Industries Ltd
Priority to CN201980094887.6A priority Critical patent/CN113646129B/zh
Priority to PCT/JP2019/026316 priority patent/WO2021001929A1/ja
Priority to JP2021529600A priority patent/JP7377868B2/ja
Publication of WO2021001929A1 publication Critical patent/WO2021001929A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B23B31/40—Expansion mandrels
    • 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
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • 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
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • B23Q3/14—Mandrels in general

Definitions

  • the present invention relates to a hydraulic clamp device and a collar member, and more particularly to a collar member used in the hydraulic clamp device and the hydraulic clamp device.
  • a cylindrical hydraulic chamber mounted on the outer circumference of the cylindrical clamp body and the clamp body and filled with a working liquid. It has a cylindrical shell member (thin-walled cylindrical body) that elastically deforms in the radial direction due to the hydraulic pressure of the hydraulic chamber, and a pressurizing portion provided on the clamp body to pressurize the working liquid.
  • a hydraulic type that clamps the clamped member fitted to the outer peripheral surface of the shell member or the outer peripheral surface of the slotted collar member mounted on the outer peripheral surface of the shell member by expanding the diameter of the shell member by the hydraulic pressure of the hydraulic chamber. Clamping devices are known (for example, Patent Documents 1 to 3).
  • An object to be solved by the present invention is to clamp a member to be clamped with a high degree of coaxiality and a high degree of straightness in clamping the member to be clamped by a hydraulic clamping device.
  • the hydraulic clamp device has a cylindrical hydraulic chamber mounted on the outer periphery of the cylindrical clamp main body and filled with a working liquid between the clamp main body.
  • a cylindrical shell member that is defined and elastically deformed in the radial direction by the hydraulic pressure of the hydraulic chamber, a pressure portion provided on the clamp body to pressurize the working liquid, and an outer peripheral surface of the shell member.
  • the collar member has a collar member to be mounted, and the collar member has a thick-walled cylindrical portion having a predetermined wall thickness and an outer peripheral surface for holding the clamped member, and an axis line from both shaft ends of the thick-walled cylindrical portion.
  • a pair of thin-walled cylindrical portions extending outward in the direction and having a wall thickness smaller than that of the thick-walled cylindrical portion, and a plurality of slots provided at a plurality of locations in the circumferential direction of the thick-walled cylindrical portion and the pair of thin-walled cylindrical portions.
  • Each slot comprises the axis of the collar member from one thin-walled cylindrical portion through the thick-walled cylindrical portion to the other thin-walled cylindrical portion, leaving the outer ends of each of the pair of thin-walled cylindrical portions.
  • Each of the outer ends of the pair of thin-walled cylindrical portions extends linearly in the direction and has a ring shape that is continuous over the entire circumference.
  • the member to be clamped can be clamped with high coaxiality and high straightness.
  • each of the pair of thin-walled cylindrical portions has a diameter-expanded portion having an inner diameter larger than the other region in the region including the outer end.
  • the thin-walled cylindrical portion does not interfere with the shell member when each of the pair of thin-walled cylindrical portions is deformed.
  • the axial length of the thick cylindrical portion is equal to the axial length of the hydraulic chamber.
  • the member to be clamped is clamped with even higher straightness.
  • the axial length of the thick-walled cylindrical portion may be shorter or longer than the axial length of the hydraulic chamber.
  • the thick-walled cylindrical portion is at the same axial position as the position of 1/2 of the axial length of the hydraulic chamber is the same as the position of 1/2 of the axial length of the hydraulic chamber.
  • the displacement in the diameter expansion direction of the thick-walled cylindrical portion due to the increase in the internal pressure of the hydraulic chamber is evenly performed when viewed in the axial direction, which contributes to the improvement of straightness.
  • the collar member according to one embodiment of the present invention is a collar member mounted on the outer peripheral surface of a hydraulic clamping device having an outer peripheral surface whose diameter is expanded by hydraulic pressure, has a predetermined wall thickness, and is clamped.
  • a thick-walled cylindrical portion having an outer peripheral surface for holding a member, a pair of thin-walled cylindrical portions extending outward in the axial direction from both axial ends of the thick-walled cylindrical portion, and having a wall thickness smaller than that of the thick-walled cylindrical portion.
  • each slot is one of the thin-walled cylinder portions, leaving the outer ends of each of the pair of thin-walled cylindrical portions. It extends linearly in the axial direction from the cylindrical portion through the thick-walled cylindrical portion to the other thin-walled cylindrical portion, and the outer ends of each of the pair of thin-walled cylindrical portions extend over the entire circumference. It has a continuous ring shape.
  • the member to be clamped can be clamped with high coaxiality and straightness.
  • the member to be clamped can be clamped with high coaxiality and high straightness.
  • FIG. 1 Perspective view showing Embodiment 1 of a hydraulic clamp device and a collar member according to the present invention.
  • the hydraulic clamp device 10 of the first embodiment has a metal columnar clamp body 12.
  • the clamp body 12 is made of metal and has a flange portion 12A in the middle portion in the axial direction.
  • the clamp body 12 is a shank portion 12B in which one side of the flange portion 12A is chucked by a rotating body (not shown) such as a machine tool, and the other side of the flange portion 12A is a mandrel for clamping the clamped member W.
  • Part 12C A ring-shaped work stopper 16 is fixed to the end surface of the flange portion 12A on the mandrel portion 12C side by bolts 14.
  • a cylindrical shell member 20 made of a thin cylindrical body is mounted on the outer circumference of the mandrel portion 12C.
  • the shell member 20 has an inner peripheral surface 20A fitted to the outer peripheral surface 12D of the mandrel portion 12C and an outer peripheral surface 20B to which the inner peripheral surface 50A of the collar member 50 described later fits, and is locked to the outer peripheral surface of the mandrel portion 12C. It is sandwiched between the snap ring 18 and the end surface of the flange portion 12A, and movement in the axial direction is restricted.
  • a wide circumferential groove-shaped annular recess 12E is formed on the outer circumference of the mandrel portion 12C, more specifically, on the outer circumference of the portion where the shell member 20 is fitted.
  • the mandrel portion 12C has a cylindrical shape, in other words, a cross-sectional shape (a cross section extending in a direction orthogonal to the central axis of the mandrel portion 12C) in cooperation with the shell member 20 in the portion of the annular recess 12E.
  • the hydraulic chamber 22 of the above is defined.
  • O-rings 24 for ensuring the liquidtightness of the hydraulic chamber 22 are attached to the outer peripheral surfaces 12D of the mandrel portion 12C on both sides of the hydraulic chamber 22 sandwiching the hydraulic chamber 22 in the axial direction. ing.
  • the shell member 20 is elastically deformed in the diameter-expanding direction due to the hydraulic pressure (internal pressure) of the hydraulic chamber 22.
  • the mandrel portion 12C is formed with a piston chamber 26 extending in the axial direction on the central axis.
  • a rod-shaped piston member 28 forming a pressurizing portion is fitted in the piston chamber 26 so as to be movable in the axial direction.
  • the piston chamber 26 communicates with the hydraulic chamber 22 by passages 30, 31 and 32 formed in the mandrel portion 12C.
  • the hydraulic chamber 22, the piston chamber 26, the passages 30, 31 and 32 are filled with the working liquid. That is, the hydraulic chamber 22 is filled with the working liquid.
  • the mandrel portion 12C is formed with a center pin hole 68 and a screw hole 34 extending along the central axis in the axial direction and opening toward the outer end of the mandrel portion 12C.
  • a set screw member 36 is screw-engaged in the screw hole 34.
  • the set screw member 36 screwes the screw hole 34 toward the piston chamber 26 by screwing, and the screwing causes the piston member 28 to move in the axial direction via the steel ball 38.
  • the piston member 28 By the movement of the piston member 28, the working liquid in the piston chamber 26, the passages 30, 31 and 32 is pressurized, and the pressure of the working liquid rises. In this way, the piston member 28, the screw hole 34, and the set screw member 36 form a pressurizing portion that pressurizes the working liquid in the hydraulic chamber 22.
  • a center pin hole 70 is formed on the central axis of the outer end of the shank portion 12B.
  • the center pin holes 68 and 70 are on the same axis.
  • the center runout measurement of the hydraulic clamp device 10 is performed in a state where the center pin C is engaged with each of the center pin holes 68 and 70 and both center pins C are held (supported by both centers).
  • a metal collar member 50 is mounted on the outer peripheral surface 20B of the shell member 20.
  • the collar member 50 has a thick cylindrical portion 52 having a predetermined wall thickness and having an outer peripheral surface 52A holding a cylindrical member to be clamped W, and the thick cylindrical portion 52 outward from both axial ends in the axial direction.
  • the thick-walled cylindrical portion 52 and the pair of thin-walled cylindrical portions 54 are on the same axis, and the inner peripheral surfaces of the cylindrical portions 52 and 54 form the inner peripheral surface 50A of the collar member 50 having the same inner diameter.
  • the inner peripheral surface 50A of the collar member 50 is fitted to the outer peripheral surface 20B of the shell member 20.
  • the wall thickness (outer diameter) of the thin-walled cylindrical portion 54 is set so as to have an appropriate elasticity that expands and deforms due to the expansion of the diameter of the shell member 20.
  • the wall thickness (outer diameter) of the thick-walled cylindrical portion 52 is thicker than the wall thickness of the thin-walled cylindrical portion 54, and is set according to the inner diameter of the member W to be clamped.
  • the position of 1/2 of the axial length of the thick-walled cylindrical portion 52 is the same as the position of 1/2 of the axial length of the hydraulic chamber 22, and the axial length A of the thick-walled cylindrical portion 52 is It is equal to the axial length B of the hydraulic chamber 22.
  • the thick-walled cylindrical portion 52 is in a position where it overlaps the hydraulic chamber 22 in the radial direction over the entire axial direction.
  • Slots (splits) 56 are formed in each of the thick-walled cylindrical portion 52 and the pair of thin-walled cylindrical portions 54 at six locations separated at equal intervals in the circumferential direction.
  • the axial direction (generatrix direction) of the collar member 50 is reached from one thin-walled cylindrical portion 54 through the thick-walled cylindrical portion 52 to the other thin-walled cylindrical portion 54, leaving the outer end 58 of the thin-walled cylindrical portion 54. It extends linearly. All slots 56 are formed leaving the outer end 58 of each thin-walled cylindrical portion 54. That is, all the slots 56 are not opened outward from the outer ends 58 of the pair of thin-walled cylindrical portions 54 at both ends. Therefore, the outer end 58 of each thin-walled cylindrical portion 54 has a circular ring shape that is continuous over the entire circumference.
  • Both ends of each slot 56 have an expanded circular opening 56A in order to avoid stress concentration during elastic deformation of the thin-walled cylindrical portion 54.
  • One of the circular openings 56A is fitted with a tip portion 62A of a set screw 62 screw-engaged with the screw hole 60 of the work stopper 16. As a result, the collar member 50 is prevented from rotating with respect to the shell member 20.
  • each thin-walled cylindrical portion 54 has a diameter-expanded portion 64 having an inner diameter larger than that of the other regions in the region including the outer end 58.
  • FIG. 2 shows an initial state in which the internal pressure (pressure of the working liquid) of the hydraulic chamber 22 is substantially atmospheric pressure, the shell member 20 has a cylindrical shape, and the collar member 50 is not elastically deformed.
  • the member W to be clamped is set on the outer circumference of the thick cylindrical portion 52.
  • the thin-walled cylindrical portion 54 is elastically deformed into a substantially truncated conical shape with the connection portion with the thick-walled cylindrical portion 52 as a large diameter, and the width of each slot 56 is expanded.
  • the thick-walled cylindrical portion 52 is displaced outward in the radial direction so that the outer diameter of the thick-walled cylindrical portion 52 becomes large.
  • the member W to be clamped is brought into close contact with the outer peripheral surface 52A of the thick cylindrical portion 52, and the member W to be clamped is fixed (clamped) to the outer periphery of the mandrel portion 12C via the collar member 50.
  • the thick-walled cylindrical portion 52 that holds the member to be clamped W is thicker than each thin-walled cylindrical portion 54, and has higher bending rigidity than each thin-walled cylindrical portion 54.
  • the deformation of the collar member 50 according to the enlarged diameter deformation of the shell member 20 occurs exclusively in each thin-walled cylindrical portion 54, and the thick-walled cylindrical portion 52 can be deformed into a Japanese drum shape at the center of the clamp body 12.
  • the diameter is evenly expanded and displaced in the radial direction without being inclined with respect to the axis.
  • the clamped member W is clamped with high straightness and high accuracy.
  • the position of 1/2 of the axial length of the thick cylindrical portion 52 is the same as the position of 1/2 of the axial length of the hydraulic chamber 22, the thickness of the thick cylindrical portion 52 due to the increase in the internal pressure of the hydraulic chamber 22.
  • the displacement of the meat cylinder portion 52 in the expansion direction is performed even more evenly when viewed in the axial direction.
  • the clamped member W is clamped with higher accuracy and higher accuracy.
  • each thin-walled cylindrical portion 54 has a circular ring shape that is continuous over the entire circumference, the slit (slot) extends to the outer end 58 of the thin-walled cylindrical portion 54, and the thin-walled cylindrical portion 54.
  • the coaxiality of the collar member 50 with respect to the clamp body 12 is higher than that in the case where the outer end 58 of the 54 is divided in the circumferential direction by grinding. As a result, the clamp member W is clamped with high coaxiality and with high accuracy.
  • each thin-walled cylindrical portion 54 has a diameter-expanded portion 64 having an inner diameter larger than the other region in the region including the outer end 58, even if the thin-walled cylindrical portion 54 is inclined and deformed with respect to the central axis of the clamp body 12.
  • the enlarged diameter portion 64 acts as a relief portion, and the thin-walled cylindrical portion 54 does not interfere with the outer peripheral surface 20B of the shell member 20. As a result, the durability of the shell member 20 is improved.
  • FIGS. 4 and 5 the parts corresponding to FIGS. 2 and 3 are designated by the same reference numerals as those given in FIGS. 2 and 3, and the description thereof will be omitted.
  • the position of 1/2 of the axial length of the thick-walled cylindrical portion 52 is the same axial position as the position of 1/2 of the axial length of the hydraulic chamber 22, but the thick-walled cylindrical portion 52
  • the axial length A is shorter than the axial length B of the hydraulic chamber 22.
  • the outer ends 58 of the pair of thin-walled cylindrical portions 54 of the collar member 50 cover the entire circumference.
  • the continuous annular shape limits the unbalanced diameter expansion of the collar member 50, and maintains accurate straightness and coaxiality.
  • FIGS. 6 and 7 the parts corresponding to FIGS. 2 and 3 are designated by the same reference numerals as those given in FIGS. 2 and 3, and the description thereof will be omitted.
  • the position of 1/2 of the axial length of the thick-walled cylindrical portion 52 is the same axial position as the position of 1/2 of the axial length of the hydraulic chamber 22, but the thick-walled cylindrical portion 52
  • the axial length A is longer than the axial length B of the hydraulic chamber 22.
  • the outer ends 58 of the pair of thin-walled cylindrical portions 54 of the collar member 50 cover the entire circumference.
  • the continuous annular shape limits the unbalanced diameter expansion of the collar member 50, and maintains accurate straightness and coaxiality.
  • the position of 1/2 of the axial length of the thick-walled cylindrical portion 52 does not necessarily have to be at the same axial position as the position of 1/2 of the axial length of the hydraulic chamber 22, and they are mutually axial. It may be in a biased position. Then, a part of the axial length of the thick cylindrical portion 52 may be arranged so as to overlap a part of the axial length of the hydraulic chamber 22.
  • the number of slots 56 is not limited to 6, and may be a plurality of slots 56 other than 6, such as 3, 4, 8, etc., and it is preferable that the slots 56 are provided at equal intervals in the circumferential direction of the color member 50. ..
  • the pressurizing portion is not limited to a manual type having a piston member 28, a screw hole 34, a set screw member 36, or the like, and may be an electric type or an electromagnetic type.
  • Hydraulic clamping device 12 Clamp body 12A: Flange portion 12B: Shank member 12C: Mandrel portion 12D: Outer peripheral surface 12E: Circular recess 14: Bolt 16: Work stopper 18: Snap ring 20: Shell member 20A: Inner circumference Surface 20B: Outer peripheral surface 22: Hydraulic chamber 24: O-ring 26: Piston chamber 28: Piston member 30: Passage 31: Passage 32: Passage 34: Screw hole 36: Push screw member 38: Steel ball 50: Collar member 50A: Inner peripheral surface 52: Thick-walled cylindrical portion 52A: Outer peripheral surface 54: Thin-walled cylindrical portion 56: Slot 56A: Circular opening 58: Outer end 60: Screw hole 62: Set screw 62A: Tip portion 64: Expanded diameter portion 68: Center pin hole 70: Center pin hole A: Axial length B: Axial length C: Center pin W: Clamped member

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)
PCT/JP2019/026316 2019-07-02 2019-07-02 液圧式クランプ装置及びカラー部材 Ceased WO2021001929A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201980094887.6A CN113646129B (zh) 2019-07-02 2019-07-02 液压式夹紧装置及套环部件
PCT/JP2019/026316 WO2021001929A1 (ja) 2019-07-02 2019-07-02 液圧式クランプ装置及びカラー部材
JP2021529600A JP7377868B2 (ja) 2019-07-02 2019-07-02 液圧式クランプ装置及びカラー部材

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/026316 WO2021001929A1 (ja) 2019-07-02 2019-07-02 液圧式クランプ装置及びカラー部材

Publications (1)

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WO2021001929A1 true WO2021001929A1 (ja) 2021-01-07

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JP (1) JP7377868B2 (https=)
CN (1) CN113646129B (https=)
WO (1) WO2021001929A1 (https=)

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US11534839B2 (en) * 2019-12-06 2022-12-27 Hydra-Lock Corporation Hydrostatically actuated workholding apparatus

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JPH0556337U (ja) * 1992-01-20 1993-07-27 黒田精工株式会社 マンドレル装置
JP2003194019A (ja) * 2001-12-28 2003-07-09 Kuroda Precision Ind Ltd クランプ装置
US20060104711A1 (en) * 2004-08-26 2006-05-18 Willi Muller Method for connecting two components and a component system for carrying out the method
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11534839B2 (en) * 2019-12-06 2022-12-27 Hydra-Lock Corporation Hydrostatically actuated workholding apparatus

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JP7377868B2 (ja) 2023-11-10
CN113646129A (zh) 2021-11-12
JPWO2021001929A1 (https=) 2021-01-07
CN113646129B (zh) 2024-04-16

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