WO2004056531A1 - Structure de l'unite de tete d'outil d'une machine de polissage - Google Patents

Structure de l'unite de tete d'outil d'une machine de polissage Download PDF

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Publication number
WO2004056531A1
WO2004056531A1 PCT/KR2003/001026 KR0301026W WO2004056531A1 WO 2004056531 A1 WO2004056531 A1 WO 2004056531A1 KR 0301026 W KR0301026 W KR 0301026W WO 2004056531 A1 WO2004056531 A1 WO 2004056531A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
bit
pressure
spindle
machine tool
Prior art date
Application number
PCT/KR2003/001026
Other languages
English (en)
Inventor
Sang-Dae Yoon
Original Assignee
Fine Ace Technology Co., 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 Fine Ace Technology Co., Ltd. filed Critical Fine Ace Technology Co., Ltd.
Priority to AU2003234857A priority Critical patent/AU2003234857A1/en
Publication of WO2004056531A1 publication Critical patent/WO2004056531A1/fr

Links

Classifications

    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • B24B35/005—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency for making three-dimensional objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Definitions

  • the present invention relates to a finishing machine tool, and more particularly, to a head unit structure in a finishing machine tool in which a grinding bit can perform a finishing work at a uniform pressure by an automated static pressure unit and an operation system of carriage means can more stably control the finishing work in order to enhance the precision and reliability of the finishing work for a workpiece .
  • a finishing work refers to a work for polishing partial faces of molded articles, which are formed from various casts such as a mold, a cold forging mold and a blank mold, like mirror faces.
  • finishing work is to minimize the surface coarseness of a molded article after milling or grinding to smoothen the surface of the molded article like a mirror f ce and maintain the precision of the surface.
  • the conventional machine tool for performing the finishing work must press the surface of a mold at a predetermined pressure while a rotary grinding bit is in contact with the surface of the mold in order to maintain predetermined surface precision. Further, since the machine tool does not have a static pressure unit which can regulate the compression force of the grinding bit, the mold can hardly obtain high surface precision, thereby degrading reliability of the finishing work.
  • the present invention has been made in view of the foregoing problems and it is an object of the invention to improve a head unit structure in a finishing machine tool having X-, Y- and Z-axial feed directions so that the rotation velocity of a grinding bit can be precisely controlled and a finishing work of a workpiece can be carried out at a pressure maintained uniformly, thereby increasing the precision of the finishing work and reducing noises and vibrations occurring during the finishing work to improve the reliability of the finishing work.
  • a head unit structure in a finishing machine tool which includes carriage units movable along X- , Y- and Z-axial directions and a bit driving unit disposed at an end of the Z-axial carriage unit for machining a workpiece
  • the bit driving unit includes: a spindle unit for turning a bit mounted thereon at high speed so that the bit serves to machine the workpiece; and a static pressure unit for moving the spindle unit according to pressure applied to the bit mounted on the spindle unit to maintain the pressure applied to the bit at a uniform level .
  • the static pressure unit may include: a base coupled with an end of the Z-axial carriage unit; an LM guide mounted on one side of the base for guiding passage of the spindle unit; a double acting air cylinder coupled with a portion of the base and actuated by compressed air to carry the spindle unit; a pressure sensor for measuring internal pressure of the double acting air cylinder; precision regulators disposed respectively at front ends of air ports of the double acting air cylinder and functioning to feed compressed air into the double acting air cylinder at a predetermined pressure corresponding to a value of the internal pressure of the double acting air cylinder measured by the pressure sensor; and an air unit having a general regulator communicating with an air supply for feeding air having a preset value of pressure to the double acting air cylinder and the precision regulators.
  • the spindle unit may includes a fixed bracket movably coupled with the static pressure unit; a spindle motor disposed on the fixed bracket for applying torque to the bit; and a spindle head connected in series with a rotary shaft of the spindle motor by means of a coupling and having a holder for gripping and turning the bit .
  • Fig. 1 is a perspective view of a finishing machine tool of the present invention
  • Fig.2 is a side elevation view of a head unit in a finishing machine tool of the present invention
  • Fig. 3 is a front elevation view of the head unit of a finishing machine tool of the invention.
  • Fig. 4 is a pneumatic circuit diagram of the head unit in a finishing machine tool of the present invention.
  • a finishing machine tool comprises a body 1, a table 50 disposed on an upper portion of the body 1 for seating a workpiece (not shown) thereon, a controller 10 disposed at one side of the body 1 for controlling the operation of the body 1, a control unit 12 mounted at the upper portion of a front portion of the body 1 and having control switches and control buttons for manipulating the controller 10, a head unit 60 and X- , Y- and Z-axial carriage units 20, 30 and 40 arranged over the table 50.
  • the X- , Y- and Z-axial carriage units 20, 30 and 40 carry a bit 62, which is mounted on the head unit 60, along X, Y and Z axes.
  • the X-axial carriage unit 20 is supported by a pair of columns 22 and 24 which are disposed on the top portion of the body 1, the Y-axial carriage unit 30 is coupled with the top portion of the X-axial carriage unit 20 so that the Y-axial carriage unit 30 can be carried along both a longitudinal direction of the X-axial carriage unit 20 and a direction perpendicular thereto, and the Z-axial carriage unit 40 is mounted to one end of the Y-axial carriage unit 30 in a vertically movable fashion.
  • the head unit 60 mounted with the bit 62 for machining the workpiece is arranged at the lower end of the Z-axial carriage unit 40. As shown in Figs.
  • the head unit 60 of a finishing machine tool of the invention includes a spindle unit 90, which is coupled with the lower end of the Z-axial carriage unit 40 and rotatably mounted with the bit 62 for machining the surface of the workpiece seated on the table 50, and a static pressure unit 80 for regulating the pressure between the bit 62 and the workpiece applied by the spindle unit 90 to a uniform level.
  • the spindle unit 90 is provided with a bracket 91 fixed to the transport side of an LM guide 86 of the static pressure unit 80.
  • a spindle motor 92 is arranged on the fixed bracket 91 for turning the bit 62 and has a rotary shaft 93 connected with a spindle head 96 by means of a coupling 94.
  • a holder 97 is arranged for securely holding the bit 62 for machining the workpiece.
  • the static pressure unit 80 includes an L-shaped base 84 coupled with the Z-axial carriage unit 40.
  • the static pressure unit 80 also includes a double acting air cylinder 82 arranged on the base 84 for vertically moving the spindle unit 90 so that the bit 62 can apply a predetermined pressure to the workpiece according to the pressure applied to the spindle unit 90.
  • an LM guide 86 is fixedly mounted to a piston 87 of the air cylinder 82 to guide linear motion of the spindle unit 90.
  • the static pressure unit 80 is designed to regulate the pressure of the double acting air cylinder 82 to a uniform level, and includes a pressure sensor 2 for detecting a variation in the internal pressure of the double acting air cylinder 82, an air unit 6 having a general or first regulator 5 communicating with an air supply 7 for feeding air of a preset pressure to the double acting air cylinder 82 and a pair of precision regulators 3 and 4 for maintaining the pressure of air supplied from the air unit 6 at a uniform level so as to precisely regulate the pressure of air fed to air ports 83 and 85 of the double acting air cylinder 82.
  • the controller 10 operates the X-, Y- and Z-axial carriage units 20, 30 and 40 in response to signals inputted via the control switches and the control buttons so that the bit 62 mounted on the head unit 60 is placed on a workpiece (not shown) to be subjected to a finishing work.
  • the controller 10 outputs a signal for controlling the spindle motor 92 of the spindle unit 90 to actuate the spindle motor 92 thereby implementing the finishing work of the workpiece .
  • the rotation speed of the bit 62 can be regulated precisely in a relatively simple manner by adjusting the rotation speed of the spindle motor 92.
  • the static pressure unit 80 carries the spindle unit 90 for machining the workpiece so that the bit 62 contacting the workpiece remains under a constant pressure.
  • compressed air from the air supply 7 is adjusted to a predetermined pressure by the first regulator 5 while passing through the air unit 6 and then fed to the pair of precision regulators 3 and 4 provided at the front ends of the air ports 83 and 85 of the double acting air cylinder 82.
  • the precision regulators 3 and 4 precisely regulate the pressure of the fed air for supply to the air ports 83 and 85 of the double acting air cylinder 82. Therefore, the compressed air fed to the air ports 83 and 85 of the double acting air cylinder 82 is regulated and fed to the air ports 83 and 85 by the precision regulators 3 and 4 so that the inside of the double acting air cylinder 82 maintains static pressure.
  • the head unit structure in a finishing machine tool having the X- , Y- and Z-axial transfer directions is improved so that the rotation velocity of the bit can be precisely controlled and a finishing work can be carried out at a uniformpressure thereby increasing the precision of the finishing work. Furthermore, noises and vibrations occurring during the finishing work can be reduced to improve the reliability of the finishing work.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

L'invention concerne un outil de machine de finition, et plus particulièrement, une structure d'unité de tête d'un outil de machine de finition dans laquelle un foret broyeur permet de réaliser un travail de finition à un niveau de pression uniforme au moyen d'une unité de pression statique automatisée et d'un système d'actionnement de moyens de levage pour en commander de façon plus stable le travail de finition afin d'améliorer la précision et la fiabilité du travail de finition d'une pièce à travailler. L'outil de la machine de finition comprend des unités de levage mobiles dans des directions axiales X, Y et Z et une unité d'entraînement de foret placé au niveau d'une extrémité de l'unité de levage axial Z en vue de travailler une pièce à travailler. L'unité d'entraînement de foret comprend : une unité de broche destinée à faire tourner un foret monté sur celle-ci à grande vitesse de sorte que le foret serve à travailler la pièce à travailler; et une unité de pression statique permettant de déplacer l'unité de broche en fonction de la pression appliquée au foret monté sur ladite unité afin de maintenir la pression appliquée au foret à un niveau uniforme. La structure de l'unité de tête de l'outil de la machine de finition comportant des directions de transfert axial X, Y et Z est améliorée de sorte que la vitesse de rotation du foret puisse être commandée de façon précise et qu'un travail de finition puisse être réalisé à une pression uniforme, augmentant ainsi la précision du travail de finition. En outre, les bruits et les vibrations inhérents au travail de finition sont réduits en vue d'améliorer la fiabilité du travail de finition.
PCT/KR2003/001026 2002-12-20 2003-05-26 Structure de l'unite de tete d'outil d'une machine de polissage WO2004056531A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003234857A AU2003234857A1 (en) 2002-12-20 2003-05-26 The structure of tool head unit of polishing maching

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2002-0081618 2002-12-20
KR1020020081618A KR100392414B1 (en) 2002-12-20 2002-12-20 Structure of tool head unit of polishing machine

Publications (1)

Publication Number Publication Date
WO2004056531A1 true WO2004056531A1 (fr) 2004-07-08

Family

ID=32677740

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2003/001026 WO2004056531A1 (fr) 2002-12-20 2003-05-26 Structure de l'unite de tete d'outil d'une machine de polissage

Country Status (3)

Country Link
KR (1) KR100392414B1 (fr)
AU (1) AU2003234857A1 (fr)
WO (1) WO2004056531A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100448616C (zh) * 2007-05-09 2009-01-07 浙江工业大学 精密双面抛光机的气动加载装置
CN107322400A (zh) * 2017-08-30 2017-11-07 张家港华翊电工有限公司 一种金属制品加工用的打磨机
CN118664393A (zh) * 2024-08-26 2024-09-20 常州市友利桐自动化设备有限公司 一种挤塑模具唇边高精度加工数控机床

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325636A (en) * 1991-06-04 1994-07-05 Seva Polishing machine with pneumatic tool pressure adjustment
US6110017A (en) * 1999-09-08 2000-08-29 Savoie; Marc Y. Method and apparatus for polishing ophthalmic lenses

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325636A (en) * 1991-06-04 1994-07-05 Seva Polishing machine with pneumatic tool pressure adjustment
US6110017A (en) * 1999-09-08 2000-08-29 Savoie; Marc Y. Method and apparatus for polishing ophthalmic lenses

Also Published As

Publication number Publication date
AU2003234857A1 (en) 2004-07-14
KR100392414B1 (en) 2003-07-22

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