WO2014061930A1 - 볼스크류를 구비한 공작기계의 열변위 방지장치 및 열변위 방지방법 - Google Patents

볼스크류를 구비한 공작기계의 열변위 방지장치 및 열변위 방지방법 Download PDF

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Publication number
WO2014061930A1
WO2014061930A1 PCT/KR2013/008854 KR2013008854W WO2014061930A1 WO 2014061930 A1 WO2014061930 A1 WO 2014061930A1 KR 2013008854 W KR2013008854 W KR 2013008854W WO 2014061930 A1 WO2014061930 A1 WO 2014061930A1
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WO
WIPO (PCT)
Prior art keywords
temperature
bearing
ball screw
machine tool
thermal displacement
Prior art date
Application number
PCT/KR2013/008854
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
노진성
Original Assignee
두산인프라코어 주식회사
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 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to CN201380054060.5A priority Critical patent/CN104718052B/zh
Publication of WO2014061930A1 publication Critical patent/WO2014061930A1/ko

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    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
    • B23Q11/143—Methods or arrangements for maintaining a constant temperature in parts of machine tools comprising heating 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
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms

Definitions

  • the present invention relates to a thermal displacement preventing device and a thermal displacement preventing method of a machine tool having a ball screw, and more particularly, to prevent thermal displacement by a heating unit and a temperature sensor mounted on a bearing housing, and by a control unit.
  • the present invention relates to a thermal displacement preventing device and a thermal displacement preventing method of a machine tool having a ball screw capable of preventing thermal displacement by controlling on / off of a power supply device for supplying power to a heating unit.
  • the ball screw 10 includes a bearing 22 in contact with the ball screw 10, a bearing housing 21 surrounding the ball screw 10, and a power transmission unit for rotating the ball screw.
  • the ball screw 10 is a thermal deformation due to heat generated by the mechanical friction, that is, the expansion and contraction according to the thermal deformation occurs.
  • the heat deformation of the ball screw is caused by the frictional heat of the ball screw and the bearing, the precision of the workpiece is reduced in the machine tool requiring high precision, and thus, the productivity of the machine tool is reduced.
  • the present invention is to solve the above problems, the present invention is a heat displacement by friction heat of the ball screw and the bearing in the machine tool equipped with the ball screw by the heating unit and the temperature sensor mounted on the bearing housing to warm up the bearing
  • a thermal displacement preventing device of a machine tool having a ball screw to prevent the damage more specifically, sudden drop in temperature during the machine tool stops for a while after the operation of the machine tool in a cold state or in a cold state, such as winter It aims to prevent thermal displacement by low temperature during operation.
  • Another object of the present invention is provided with a ball screw by controlling the power of the power supply unit applied to the heating unit according to the temperature measured by the temperature sensor through a control unit having a temperature storage unit, a memory unit and a control unit It is an object of the present invention to provide a thermal displacement prevention method that can minimize thermal displacement of a machine tool.
  • the apparatus for preventing heat displacement of a machine tool having a ball skew includes: a bearing installed at an outer circumference of the ball screw; A bearing housing for supporting the bearing; A space part formed on an upper side of the bearing housing; A heating unit having an external shape corresponding to the internal shape of the space part; A temperature sensor installed at a position facing the heating unit; And a control unit controlling on / off of the power supply device for supplying power to the heating unit according to the temperature measured by the temperature sensor.
  • the heating unit has a heat coil having a shape corresponding to the internal shape of the space portion; A heating coil installed in the heating coil and generating heat; A heating wire insulator installed on an upper end of the heating wire fin to insulate the heating coil; And a hot wire wire, one end of which is inserted into the hot wire insulator, is connected to the hot wire coil, and the other end thereof is connected to a power supply device to supply power to the hot wire coil.
  • the control unit includes a temperature storage unit for storing the temperature of the bearing measured by the temperature sensor; A memory unit in which a predetermined temperature of the bearing is stored; And a controller configured to control the on / off of the power supply by comparing the measured temperature of the bearing stored in the temperature storage unit with the temperature stored in the memory unit.
  • a method for preventing heat displacement of a machine tool having a ball skew includes measuring a temperature of a bearing by a temperature sensor; Transmitting the measured temperature of the bearing to a temperature storage unit; Comparing the measured temperature of the bearing stored in the temperature storage unit with a preset temperature value of the bearing stored in the memory unit; And controlling on / off of the power supply device according to the compared temperature.
  • the device and the correction method of the machine tool by the static deflection according to the present invention especially in the cold or cold conditions, such as during the operation of the machine tool for a while after a short stop after the operation of the machine in the cold or cold
  • By correcting the position error of the machine tool due to the static deflection generated in real time has the effect of improving the processing precision and productivity of the workpiece.
  • the correction device and the correction method of the machine tool by the static deflection according to the present invention determines the amount of deflection error according to the prediction for each measurement position of each structure of the machine tool according to the prediction and not the amount of correction according to the actual static deflection By calculating and correcting this, it is possible to improve productivity through accurate error correction.
  • the correction apparatus and the correction method of the machine tool by the static deflection according to the present invention do not need to calculate the expected error amount according to all the transfer sections of the machine tool, thereby saving time and cost for the position correction by the static deflection It can be effective.
  • FIG. 1 shows a cross-sectional view of a device for preventing thermal displacement in a machine tool with a conventional ball screw.
  • Figure 2 shows a conceptual diagram of a thermal displacement prevention apparatus of a machine tool having a ball screw according to an embodiment of the present invention.
  • Figure 3 is a plan view showing the installation position of the heating unit and the temperature sensor in the heat displacement prevention device of the machine tool having a ball screw according to an embodiment of the present invention.
  • Figure 4 shows a detailed cross-sectional view of the heating unit in the heat displacement prevention device of the machine tool having a ball screw according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method for preventing thermal displacement of a machine tool having a ball screw according to an exemplary embodiment of the present invention.
  • control unit control unit
  • 71 temperature storage unit
  • Figure 2 shows a conceptual diagram of a thermal displacement prevention apparatus of a machine tool having a ball screw according to an embodiment of the present invention.
  • Figure 3 is a plan view showing the installation position of the heating unit and the temperature sensor in the heat displacement prevention device of the machine tool having a ball screw according to an embodiment of the present invention
  • Figure 4 is according to a preferred embodiment of the present invention The detailed cross section of a heating unit in the heat displacement prevention apparatus of the machine tool provided with the ball screw is shown.
  • Heat displacement prevention device of a machine tool provided with a ball screw according to the present invention is a bearing 22, a bearing housing 21, a space 50, a heating unit 30, a temperature sensor 40, and a control unit ( 70).
  • the ball screw 10 is used as a conveying means of the machine tool by converting the rotational motion into a linear motion.
  • the bearing 22 is installed on the outer circumference of the ball screw 10.
  • the bearing housing 21 supports the bearing 22, and the bearing housing 21 is installed to surround the bearing 22 so as to couple the bearing 22 to the ballscrew 10.
  • the space 50 is formed on one side of the upper portion of the bearing housing 21.
  • the space 50 is 90 mm in length and 6 mm (pie) in diameter.
  • the space 50 is formed in a two-layer structure is the heating unit 30 and the temperature The sensor 40 and the machine tool may be prevented from being separated from the space 50 even during operation.
  • the heating unit 30 has an external shape corresponding to the internal shape of the space 50 and is inserted into the space 50.
  • the temperature sensor 40 is installed on the other upper side of the bearing housing 21 to face the heating unit 30.
  • the control unit 70 controls on / off of the power supply device 80 that supplies power to the heating unit 30 according to the temperature measured by the temperature sensor 40. That is, the temperature of the bearing 22 is measured in real time through the temperature sensor 40, and the on / off of the power supply device 80 is controlled by comparing the real time temperature of the bearing with a preset temperature.
  • the predetermined temperature is preferably set to 18 ° C ⁇ 20 ° C.
  • the heat displacement preventing device of the machine tool having the ball screw minimizes the heat deformation caused by the frictional heat generated by the mechanical friction between the ball screw and the bearing, thereby reducing the machining error of the workpiece to reduce the productivity of the workpiece.
  • through the on / off control of the power supply device 80 for supplying power to the heating unit 30 to perform the appropriate temperature warm-up operation of the equipment for a long time before processing the workpiece of the machine tool heating unit 30 In this way, productivity can be improved by performing a warm-up operation of equipment for processing a workpiece in a short time.
  • productivity can be improved by performing a warm-up operation of equipment for processing a workpiece in a short time.
  • the equipment for processing the workpiece is operated at an appropriate temperature, it is possible to reduce the thermal deformation prevention and to reduce the cost for maintaining the thermal deformation prevention.
  • the heating unit 30 is a hot wire fin 34, hot coil (33), hot wire It consists of the insulator 32 and the hot wire wire 31.
  • the hot wire fin 34 has a shape corresponding to the internal shape of the space 50.
  • the hot wire pin 34 is projected to the outside of the bearing housing 22 to correspond to the two-layer structure of the space 50
  • the upper portion of the hot wire fin 34 is formed to have a larger diameter than the lower portion of the hot wire fin 34.
  • the hot wire coil 33 is installed on the internal space of the hot wire fin 34.
  • the hot wire coil 33 warms up the bearing 21 by generating heat by the power supplied through the hot wire wire 31 when the power supply device 80 is turned on by the control unit.
  • the hot wire insulator 32 is installed on the upper end of the hot wire pin 34.
  • the heating unit 30 protects the heating unit 30 from an accident such as a short circuit occurring when power is applied to the heating coil 33 by the hot wire insulator 32.
  • One end of the heating wire 31 is inserted into the heating wire insulator 32 and connected to the heating coil 33, the other end of the heating wire 31 is connected to the power supply device 80, the power supply device 80 Power is supplied to the heating coil 33 when it is turned on.
  • control unit 70 is a temperature storage unit 71, memory unit 72, And a control unit 73.
  • the temperature storage unit 71 stores the temperature of the bearing 22 measured in real time by the temperature sensor 40, and transmits the temperature of the bearing 220 stored in real time to the controller 73.
  • the memory unit 72 stores a suitable temperature of the bearing 22 in a database in consideration of the length and diameter of the ball screw and the like.
  • the predetermined temperature of the bearing stored in the memory unit 72 of the heat displacement preventing apparatus of the machine tool having the ball screw according to the present invention is preferably 18 ° C ⁇ 20 ° C, memory Most preferably, the preset temperature of the bearing stored in the part is 20 ° C.
  • the control unit 73 is measured in real time to compare the temperature of the bearing stored in the temperature storage unit 71 with the numerical value stored at a predetermined temperature in the memory unit 72 to turn on / off (on / off) of the power supply device (80) ).
  • the power supply of the power supply device may be cut off to prevent unnecessary energy from being wasted, thereby reducing costs.
  • FIG. 5 is a flowchart illustrating a method for preventing thermal displacement of a machine tool having a ball screw according to an exemplary embodiment of the present invention.
  • Heat displacement prevention method of a machine tool having a ball screw according to the present invention step of measuring the real-time temperature of the bearing (S1), transmitting the measured temperature to the temperature storage unit (S2), the preset temperature And comparing the measured temperature stored in the temperature storage unit (S3), and controlling the on / off of the power supply device 80 (S4).
  • the temperature of the bearing is measured by the temperature sensor 40 in real time. After the temperature measuring step S1 of the bearing, the measured real-time temperature of the bearing is transmitted to the temperature storage unit 71. After the step S2 of transferring to the temperature storage unit 71, the bearings stored in the temperature storage unit 71 and the preset temperature (18 ° C to 20 ° C) of the bearing 22 stored in the memory unit 72. Compare the measured temperature in real time. After comparing the preset temperature with the real-time measurement temperature (S3), the controller 73 controls on / off of the power supply device 80 according to the compared temperature.
  • the present invention prevents thermal displacement by a heating unit and a temperature sensor mounted on a bearing housing, and controls the thermal displacement by controlling the on / off of a power supply device that supplies power to the heating unit by a control unit.
  • the present invention relates to a heat displacement preventing device and a heat displacement preventing method of a machine tool having a ball screw that can be prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automatic Control Of Machine Tools (AREA)
  • Rolling Contact Bearings (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
PCT/KR2013/008854 2012-10-16 2013-10-04 볼스크류를 구비한 공작기계의 열변위 방지장치 및 열변위 방지방법 WO2014061930A1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380054060.5A CN104718052B (zh) 2012-10-16 2013-10-04 具备滚珠丝杠的机床的热位移防止装置及热位移防止方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2012-0114540 2012-10-16
KR1020120114540A KR101905087B1 (ko) 2012-10-16 2012-10-16 볼스크류를 구비한 공작기계의 열변위 방지장치 및 열변위 방지방법

Publications (1)

Publication Number Publication Date
WO2014061930A1 true WO2014061930A1 (ko) 2014-04-24

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PCT/KR2013/008854 WO2014061930A1 (ko) 2012-10-16 2013-10-04 볼스크류를 구비한 공작기계의 열변위 방지장치 및 열변위 방지방법

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Country Link
KR (1) KR101905087B1 (zh)
CN (1) CN104718052B (zh)
WO (1) WO2014061930A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6330091B2 (ja) * 2016-08-08 2018-05-23 花王株式会社 加工装置
KR101867226B1 (ko) 2017-04-06 2018-06-12 김성훈 머시닝센터에 구비되는 볼스크류의 열변위 보정장치 및 방법
CN107042424A (zh) * 2017-04-07 2017-08-15 深圳市创智自动化有限公司 机床及其丝杠组件

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0720241U (ja) * 1993-09-14 1995-04-11 エンシュウ株式会社 送りねじの熱変位抑制装置
JP2003172427A (ja) * 2001-11-09 2003-06-20 Shangyin Sci & Technol Co Ltd 冷却装置付ボール・スクリュー・アセンブリー
CN2873409Y (zh) * 2005-11-28 2007-02-28 陈志平 综合加工机的热补偿装置
JP2010025826A (ja) * 2008-07-22 2010-02-04 Nsk Ltd 直動ねじ装置の異常判定方法
KR101017842B1 (ko) * 2008-10-23 2011-03-04 (주)유지인트 볼 스크류 조립체의 냉각장치

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1190609C (zh) * 2001-10-31 2005-02-23 上银科技股份有限公司 具冷却装置的滚珠螺杆
CN2566571Y (zh) * 2002-07-05 2003-08-13 熊欣 一种带塞盖的棒状电加热器
KR100688960B1 (ko) * 2004-10-15 2007-03-02 두산인프라코어 주식회사 볼 스크류 조립체의 냉각장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0720241U (ja) * 1993-09-14 1995-04-11 エンシュウ株式会社 送りねじの熱変位抑制装置
JP2003172427A (ja) * 2001-11-09 2003-06-20 Shangyin Sci & Technol Co Ltd 冷却装置付ボール・スクリュー・アセンブリー
CN2873409Y (zh) * 2005-11-28 2007-02-28 陈志平 综合加工机的热补偿装置
JP2010025826A (ja) * 2008-07-22 2010-02-04 Nsk Ltd 直動ねじ装置の異常判定方法
KR101017842B1 (ko) * 2008-10-23 2011-03-04 (주)유지인트 볼 스크류 조립체의 냉각장치

Also Published As

Publication number Publication date
KR20140049153A (ko) 2014-04-25
CN104718052A (zh) 2015-06-17
CN104718052B (zh) 2017-04-26
KR101905087B1 (ko) 2018-10-08

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