KR20090064627A - Ball screw apparatus having cooing unit - Google Patents

Ball screw apparatus having cooing unit Download PDF

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Publication number
KR20090064627A
KR20090064627A KR1020070131895A KR20070131895A KR20090064627A KR 20090064627 A KR20090064627 A KR 20090064627A KR 1020070131895 A KR1020070131895 A KR 1020070131895A KR 20070131895 A KR20070131895 A KR 20070131895A KR 20090064627 A KR20090064627 A KR 20090064627A
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KR
South Korea
Prior art keywords
cooling oil
ball screw
cooling
screw shaft
shaft
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KR1020070131895A
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Korean (ko)
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류상문
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두산인프라코어 주식회사
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Priority to KR1020070131895A priority Critical patent/KR20090064627A/en
Publication of KR20090064627A publication Critical patent/KR20090064627A/en

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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
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/46—Movable or adjustable work or tool supports using particular mechanisms with screw pairs
    • 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
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
    • 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
    • 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

Abstract

A ball screw apparatus with a cooing unit is provided to prevent the contamination of the cooling oil and damage to a cooling oil supply unit by supplying cooling oil inside a bearing housing isolated from external work environment. A ball screw apparatus(200) with a cooing unit comprises spindle bearings(211a, 211b), a ball screw shaft(220), a ball nut(230), a cooling oil sealing unit(240), and a cooling oil supply pipe(250a). The spindle bearing is respectively equipped inside a supply side bearing housing(210a) and a discharge side bearing housing(210b) which are apart from each other at the fixed intervals. The both ends of the ball screw shaft are coupled on the spindle bearing respectively. On the central part of the ball screw shaft, a cooling oil cyclic channel(221) is formed. On the external diameter of one end of the ball screw shaft, a cooling oil supply hole(222) connected to the cooling oil cyclic channel is formed. The cooling oil supply hole is formed in order to be connected to the channel formed inside the supply side bearing housing. In the other end part of the ball screw shaft, the cooling oil discharge hole connected to the cooling oil cyclic channel is formed. The ball nut is ball-screwed with the ball screw shaft.

Description

냉각장치를 구비한 볼 스크류 장치{BALL SCREW APPARATUS HAVING COOING UNIT}Ball screw unit with cooling device {BALL SCREW APPARATUS HAVING COOING UNIT}

본 발명은 냉각장치를 구비한 볼 스크류 장치에 관한 것으로, 특히 외부 작업환경으로부터 격리된 베어링 하우징의 내부에서 냉각유의 공급이 이루어지도록 함으로써 냉각유의 오염 및 냉각유 공급기의 손상을 방지하고, 또한 누유된 냉각유를 배유시키는 드레인홀을 구비하여 축 베어링의 손상을 방지하는 냉각장치를 구비한 볼 스크류 장치에 관한 것이다.The present invention relates to a ball screw device having a cooling device, and in particular, by the supply of the cooling oil in the bearing housing isolated from the external working environment to prevent contamination of the cooling oil and damage to the cooling oil supply, A ball screw device having a cooling device having a drain hole for draining cooling oil to prevent damage to the shaft bearing.

일반적으로 공작기계나 복합가공기는 공작물의 가공을 위해 테이블, 공구대 또는 주축과 같은 이송부재를 직선왕복운동시킬 수 있도록 볼 스크류 장치를 채용하고 있는데, 이러한 볼 스크류 장치는 구동모터에 의해 회전하는 볼 스크류 축과, 상기 볼 스크류 축과 볼 나사 결합되어 직선왕복운동을 하는 볼 너트 및 볼 스크류 축의 회전을 지지하는 축 베어링 등을 포함하여 이루어진다.In general, a machine tool or a multi-task machine employs a ball screw device to linearly reciprocate a conveying member such as a table, a tool bar or a spindle for machining a workpiece. The ball screw device is a ball rotating by a driving motor. And a screw shaft, a ball nut coupled to the ball screw shaft and a ball screw to linearly reciprocate, and a shaft bearing for supporting rotation of the ball screw shaft.

한편, 이상과 같은 볼 스크류 장치는 볼 스크류 축의 고속 회전시 발생된 열에 의해 축 베어링을 포함한 다양한 유닛에 손상이 발생하게 되므로, 최근에는 이러한 손상을 방지하기 위해 볼 스크류 축 내부에 냉각유가 흐르도록 함으로써 장치 를 냉각시킬 수 있는 냉각장치를 구비한 볼 스크류 장치가 제공되고 있다.On the other hand, the ball screw device as described above is damaged in various units including the shaft bearing by the heat generated during the high-speed rotation of the ball screw shaft, in recent years by allowing the cooling oil to flow inside the ball screw shaft to prevent such damage A ball screw device with a cooling device capable of cooling the device is provided.

즉, 도 1에 도시된 바와 같이, 볼 스크류 장치(100)는 각각 지지프레임(101a, 101b)에 의해 고정된 양측의 베어링 하우징(110a, 110b)과, 상기 양측의 베어링 하우징(110a, 110b) 내부에 각각 설치된 축 베어링(111a, 111b)과, 외경부에 나선상으로 제1 볼 홈(미도시)이 형성되어 있으며 양단부가 축 베어링(111a, 111b)과 회전 가능하도록 결합된 볼 스크류 축(120)과, 볼 스크류 축(120)에 볼 나사 결합되며 내경부에 상기 제1 볼 홈에 대응하는 제2 볼 홈(미도시)이 형성된 볼 너트(130) 및 제1, 2 볼 홈들간에 회전 가능하게 개재된 다수개의 볼(ball)(미도시) 등을 포함한다.That is, as shown in FIG. 1, the ball screw device 100 has bearing housings 110a and 110b on both sides fixed by the support frames 101a and 101b, respectively, and bearing housings 110a and 110b on both sides. Each of the shaft bearings 111a and 111b installed therein and a first ball groove (not shown) are formed in the outer diameter in a spiral shape, and the ball screw shaft 120 is coupled to the both ends so as to be rotatable with the shaft bearings 111a and 111b. And a ball screw 130 coupled to the ball screw shaft 120 and a ball nut 130 having a second ball groove (not shown) corresponding to the first ball groove in an inner diameter thereof, and rotating between the first and second ball grooves. Possibly a plurality of balls (not shown) or the like.

그리고, 이러한 볼 스크류 장치(100)의 냉각을 위해 상기 볼 스크류 축(120)의 중심부에는 냉각유체 순환통로(121)가 축 방향으로 형성되어 있고, 냉각유체 순환통로(121)의 일측에는 냉각유체 공급공(122)이 반경 방향으로 형성되어 있으며, 냉각유체 순환통로(121)의 타측에는 냉각유체 배출공(미도시)이 냉각유체 배출관(150b)과 연통하도록 형성되어 있다.In addition, a cooling fluid circulation passage 121 is formed in the center of the ball screw shaft 120 in the axial direction for cooling the ball screw device 100, and a cooling fluid is provided at one side of the cooling fluid circulation passage 121. The supply hole 122 is formed in the radial direction, and the cooling fluid discharge hole (not shown) is formed on the other side of the cooling fluid circulation passage 121 so as to communicate with the cooling fluid discharge pipe 150b.

또한, 오링(141)과 실링 하우징(142)을 구비한 냉각유 실링유닛(140)이 냉각유체 공급공(122)이 형성된 볼 스크류 축(120)의 외주면을 따라서 설치되어 있고, 냉각유 실링유닛(140)을 외부환경으로 보호하기 위한 엔드캡(160)이 냉각유 실링유닛(140)의 일측에 결합되어 있으며, 냉각유체 공급관(150a)이 냉각유 실링유닛(140)을 통해 공급포트(141) 및 냉각유체 공급공(122)과 연통하도록 설치되어 있다.In addition, the cooling oil sealing unit 140 including the O-ring 141 and the sealing housing 142 is installed along the outer circumferential surface of the ball screw shaft 120 in which the cooling fluid supply hole 122 is formed, and the cooling oil sealing unit is provided. End cap 160 for protecting the 140 to the external environment is coupled to one side of the cooling oil sealing unit 140, the cooling fluid supply pipe (150a) supply port 141 through the cooling oil sealing unit 140 ) And a cooling fluid supply hole 122 are installed.

그러나, 이상과 같은 볼 스크류 장치(100)는 냉각유체 공급공(122)이 외부 작업환경에 노출된 베어링 하우징(110a)의 외측에 형성되어 있어서, 절삭유나 미세 칩 등이 냉각유 실링유닛(140)과 엔드캡(160) 사이의 미세한 틈새를 통해 냉각유체 공급공(122)으로 유입되고, 그 유입된 절삭유나 미세 칩이 냉각유와 혼합되어 냉각기능 저하를 유발시킴은 물론, 오링(141)의 부식이나 냉각유체 공급공(122)의 막힘 등과 같은 손상을 유발시킨다는 문제점이 있었다.However, the ball screw device 100 as described above is formed on the outer side of the bearing housing 110a in which the cooling fluid supply hole 122 is exposed to the external working environment, such that cutting oil, a fine chip, or the like is used for the cooling oil sealing unit 140. And a small gap between the end cap 160 and into the cooling fluid supply hole 122, and the cutting oil or the fine chips introduced therein are mixed with the cooling oil to cause a decrease in cooling function, as well as the O-ring 141. There was a problem that causes damage, such as corrosion or blockage of the cooling fluid supply hole (122).

더욱이, 오링(141)은 고속 회전하는 볼 스크류 축(120)과 직접 접촉하고 있어 장시간 사용시 마모가 발생하게 되므로, 오링(141)의 마모시에는 상술한 바와 같은 절삭유나 미세 칩과 냉각유의 혼합이 더욱 잘 일어난다는 문제점이 있었다.In addition, since the O-ring 141 is in direct contact with the ball screw shaft 120 that rotates at a high speed, wear occurs during a long time. Thus, when the O-ring 141 is worn, mixing of cutting oil, fine chips, and cooling oil as described above may be prevented. There was a problem that happens better.

또한, 이상과 같은 문제점들 이외에도 오링(141)을 통해 누유된 냉각유가 축 베어링(111a)으로 용이하게 침투할 수 있어서, 해당 축 베어링(111a)에 손상이 발생한다는 문제점이 있었다.In addition, in addition to the above problems, the cooling oil leaked through the O-ring 141 can easily penetrate into the shaft bearing 111a, and there is a problem that damage occurs in the shaft bearing 111a.

본 발명은 전술한 바와 같은 문제점을 해결하기 위해 제안된 것으로, 외부 작업환경으로부터 격리된 베어링 하우징의 내부에서 냉각유의 공급이 이루어지도록 함으로써 냉각유의 오염 및 냉각유 공급기의 손상을 방지하고, 또한 누유된 냉각유를 배유시키는 드레인홀을 구비하여 축 베어링의 손상을 방지하는 냉각장치를 구비한 볼 스크류 장치를 제공하고자 한다.The present invention has been proposed to solve the problems described above, by preventing the coolant from contaminating the coolant and damage to the coolant supply by allowing the coolant to be supplied inside the bearing housing isolated from the external working environment, The present invention provides a ball screw device having a cooling device having a drain hole for draining cooling oil to prevent damage to the shaft bearing.

이를 위해 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치(200)는 서로 소정 간격으로 이격되어 있는 공급측 베어링 하우징(210a)과 배출측 베어링 하우징(210b) 내부에 각각 장치되는 축 베어링(211a, 211b)과; 양단부가 상기 축 베어링(211a, 211b)에 각각 결합되고, 중심부에는 냉각유 순환통로(221)가 형성되어 있고, 일단부의 외경에는 상기 냉각유 순환통로(221)와 연통하는 냉각유 공급공(222)이 상기 공급측 베어링 하우징(210a)의 내부에 형성된 유로와 연통되도록 형성되어 있으며, 타단부에는 상기 냉각유 순환통로(221)와 연통하는 냉각유 배출공이 형성되어 있는 볼 스크류 축(220)과; 상기 볼 스크류 축(220)과 볼 나사 결합되어, 상기 볼 스크류 축(220)의 회전 방향에 따라 직선왕복운동을 하는 볼 너트(230)와; 상기 공급측 베어링 하우징(210a) 내부에서, 상기 냉각유 공급공(222)이 형성된 볼 스크류 축(220)의 외주면을 감싸도록 결합된 냉각유 실링유닛(240); 및 상기 냉각유 실링유닛(240)을 관통하여 상기 냉각유 공급공(222)과 연결된 냉각유 공급 관(250a);을 포함하는 것을 특징으로 한다.To this end, the ball screw device 200 with a cooling device according to the present invention is a shaft bearing (211a, 211b) respectively installed in the supply-side bearing housing 210a and the discharge-side bearing housing 210b spaced apart from each other at a predetermined interval. )and; Both ends are coupled to the shaft bearings 211a and 211b, respectively, and a cooling oil circulation passage 221 is formed at a central portion thereof, and a cooling oil supply hole 222 communicating with the cooling oil circulation passage 221 at an outer diameter of one end portion. A ball screw shaft 220 having a cooling oil discharge hole communicating with the cooling oil circulation passage 221 formed at the other end thereof, and the other end portion communicating with a flow path formed in the supply-side bearing housing 210a; A ball nut 230 coupled to the ball screw shaft 220 and performing a linear reciprocating motion according to the rotational direction of the ball screw shaft 220; A cooling oil sealing unit (240) coupled to the outer circumferential surface of the ball screw shaft (220) in which the cooling oil supply hole (222) is formed in the supply side bearing housing (210a); And a cooling oil supply pipe (250a) connected to the cooling oil supply hole (222) through the cooling oil sealing unit (240).

상기 볼 스크류 축(220)이 삽입되도록 축공이 형성된 상기 공급측 베어링 하우징(210a)의 일측 내주면에는 오일 실(oil seal)(212)이 삽입 설치되어 있는 것이 바람직하다.It is preferable that an oil seal 212 is inserted into one side inner circumferential surface of the supply side bearing housing 210a in which the shaft hole is formed so that the ball screw shaft 220 is inserted.

상기 냉각유 실링유닛(240)은 상기 냉각유 공급공(222)이 형성된 볼 스크류 축(220)의 외주면을 따라 결합된 오링(241)과 상기 오링(241)을 감싸도록 설치된 실링 하우징(242)을 포함하며, 상기 실링 하우징(242)에는 누유된 냉각유를 외부로 배유시키는 드레인홀(drain hole)(244)이 형성되어 있는 것을 특징으로 한다.The cooling oil sealing unit 240 is a sealing housing 242 installed to surround the O-ring 241 and the O-ring 241 coupled along the outer circumferential surface of the ball screw shaft 220 in which the cooling oil supply hole 222 is formed. The sealing housing 242 is characterized in that the drain hole (244) for draining the leaked cooling oil to the outside is formed.

상기 냉각유 공급공(222)과 냉각유 공급관(250a)은 각각 2개이상씩 구비되어 서로 연통되는 것을 특징으로 한다.The cooling oil supply hole 222 and the cooling oil supply pipe 250a are each provided with two or more, characterized in that the communication with each other.

이상과 같은 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치에 의하면, 외부 작업환경으로부터 격리된 베어링 하우징의 내부에서 냉각유의 공급이 이루어지도록 하여 냉각유의 오염 및 냉각유 공급기의 손상을 방지할 수 있게 된다.According to the ball screw device having a cooling device according to the present invention as described above, the cooling oil is supplied in the bearing housing isolated from the external working environment to prevent contamination of the cooling oil and damage to the cooling oil supply. do.

또한, 누유된 냉각유를 배유시키는 드레인홀을 구비하여 축 베어링의 손상을 방지할 수 있게 된다.In addition, by providing a drain hole for draining the leaked cooling oil it is possible to prevent damage to the shaft bearing.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 냉각장치를 구비한 볼 스크류 장치에 대해 상세히 설명하도록 한다. Hereinafter, a ball screw device having a cooling device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

단, 이하에서는 냉각유 및 냉각기체 등을 포함한 다양한 냉각유체들 중 냉각 유를 이용한 냉각 방식을 일 예로 들어 설명하도록 한다.However, hereinafter, a cooling method using cooling oil among various cooling fluids including cooling oil and cooling gas will be described as an example.

또한, 냉각유 배출측 보다는 냉각유 공급측의 구성이 냉각특성 등에 월등히 큰 영향을 미치므로, 이하에서는 냉각유 공급측을 중심으로 본 발명에 대해 설명하도록 한다. 그러므로, 본 발명은 이에 한정하는 것이 아니고 냉각유 배출측에도 적용될 수 있음은 자명할 것이다.In addition, since the configuration of the cooling oil supply side rather than the cooling oil discharge side greatly affects the cooling characteristics, etc., the present invention will be described below with reference to the cooling oil supply side. Therefore, it will be apparent that the present invention is not limited thereto but may be applied to the cooling oil discharge side.

도 2는 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치의 평단면도이고, 도 3은 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치의 정단면도이다.2 is a cross sectional plan view of a ball screw device with a cooling device according to the invention, and FIG. 3 is a front sectional view of a ball screw device with a cooling device according to the invention.

도 2 및 도 3을 통해 알 수 있는 바와 같이, 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치(200)는 각각 지지프레임(201a, 201b)에 의해 고정 설치된 양측의 베어링 하우징(210a, 210b)과, 상기 베어링 하우징(210a, 210b) 내부에 각각 장치되는 축 베어링(211a, 211b)과, 양단부가 축 베어링(211a, 211b)에 각각 결합되고 일단은 구동모터(M)와 결합된 볼 스크류 축(220) 및 상기 볼 스크류 축(220)과 볼 나사 결합된 볼 너트(230) 등을 포함하여, 볼 스크류 축(220)의 회전 방향에 따라 볼 너트(230)가 양측의 베어링 하우징(210a, 210b) 사이에서 직선왕복운동 할 수 있도록 구성된다.As can be seen from Figures 2 and 3, the ball screw device 200 with a cooling device according to the present invention, the bearing housings (210a, 210b) of both sides fixedly installed by the support frame (201a, 201b), respectively And a ball screw shaft coupled to the shaft bearings 211a and 211b respectively installed in the bearing housings 210a and 210b and both ends thereof coupled to the shaft bearings 211a and 211b and one end coupled to the driving motor M. And the ball nut 230 and the ball nut 230 and the ball screw coupled to the ball screw shaft 220, the ball nut 230 in accordance with the rotation direction of the ball screw shaft 220, bearing housings 210a, 210b) is configured to allow a straight reciprocating motion.

이때, 볼 스크류 축(220)의 중심부에는 그 축 길이 방향으로 냉각유 순환통로(221)가 형성되어 있고, 그 양측 단부에는 냉각유 공급공(222)과 배출공(미도시)이 각각 형성되어 있다. At this time, a cooling oil circulation passage 221 is formed in the center of the ball screw shaft 220 in the longitudinal direction of the shaft, and cooling oil supply holes 222 and discharge holes (not shown) are formed at both ends thereof. have.

또한, 냉각유 공급공(222)이 형성된 볼 스크류 축(220)의 외주면에는 냉각유 실링유닛(240)이 결합되어 있고, 냉각유 공급관(250a)이 냉각유 실링유닛(240)을 통해 냉각유 공급공(222)과 연결되어 있다. In addition, a cooling oil sealing unit 240 is coupled to an outer circumferential surface of the ball screw shaft 220 in which the cooling oil supply hole 222 is formed, and the cooling oil supply pipe 250a is connected to the cooling oil through the cooling oil sealing unit 240. It is connected to the supply hole 222.

따라서, 냉각유가 냉각유 공급공(222)을 통해 냉각유 순환통로(221)로 공급되고, 공급된 냉각유가 순환을 마친 다음 냉각유 배출공 및 냉각유 배출관(150b)을 통해 배출됨으로써, 상기한 바와 같은 구성으로 이루어진 냉각장치를 구비한 볼 스크류 장치(200)를 냉각시킬 수 있게 한다.Therefore, the cooling oil is supplied to the cooling oil circulation passage 221 through the cooling oil supply hole 222, and the supplied cooling oil is discharged through the cooling oil discharge hole and the cooling oil discharge pipe 150b after completing the circulation. It is possible to cool the ball screw device 200 having a cooling device having a configuration as described above.

좀 더 상세히 설명하면, 냉각유의 공급측과 배출측에 각각 위치한 양측의 베어링 하우징(210a, 210b)은 각각 지지프레임(201a, 201b)에 의해 바닥면에 견고히 고정되며, 이들 양측 베어링 하우징(210a, 210b)은 서로 일정 간격으로 이격 설치된다. 단, 이격 거리는 볼 너트(230)의 직선왕복운동 거리에 따라 결정되는 것이 일반적이다.In more detail, the bearing housings 210a and 210b on both sides respectively positioned on the supply and discharge sides of the cooling oil are firmly fixed to the bottom by the support frames 201a and 201b, respectively, and the bearing housings 210a and 210b on both sides thereof. ) Are spaced apart from each other at regular intervals. However, the separation distance is generally determined according to the linear reciprocating distance of the ball nut 230.

축 베어링(211a, 211b)은 상기 양측의 베어링 하우징(210a, 210b) 내부에 각각 장치되어 볼 스크류 축(220)을 지지함과 동시에 볼 스크류 축(220)의 회전을 안내하기 위한 것으로, 이러한 축 베어링(211a, 211b)은 일 예로 볼 베어링 등이 사용될 수 있다.The shaft bearings 211a and 211b are respectively installed in the bearing housings 210a and 210b on both sides to support the ball screw shaft 220 and guide the rotation of the ball screw shaft 220. As the bearings 211a and 211b, for example, a ball bearing may be used.

볼 스크류 축(220)은 자체의 회전에 의해 볼 너트(230)를 직선왕복운동시키기 위한 것으로, 양단부가 축 베어링(211a, 211b)과 회전 가능하도록 결합되어 있고, 일단은 구동모터(M)의 회전축과 연결되어 있으며, 외주면에는 주지된 바와 같이 나선상의 제1 볼 홈(미도시)이 형성되어 있다.The ball screw shaft 220 is for linearly reciprocating the ball nut 230 by its own rotation, and both ends thereof are rotatably coupled to the shaft bearings 211a and 211b, and one end of the driving motor M is rotated. It is connected with the rotating shaft, and a spiral first ball groove (not shown) is formed on the outer circumferential surface.

또한, 그 중심부에는 축 길이 방향으로 냉각유 순환통로(221)가 형성되어 있고, 양측부에는 상기 냉각유 순환통로(221)와 연통하는 적어도 하나 이상의 냉각유 공급공(222)과 냉각유 배출공이 각각 형성되어 있으며, 이때 상기 냉각유 공급공(222) 및 냉각유 배출공은 냉각유 공급관(250a) 및 냉각유 배출관(250b)과 각각 연결되어 있다.In addition, a cooling oil circulation passage 221 is formed in the central portion thereof in the axial length direction, and at least one cooling oil supply hole 222 and the cooling oil discharge hole communicating with the cooling oil circulation passage 221 are formed at both sides thereof. Each of the cooling oil supply holes 222 and the cooling oil discharge holes are connected to the cooling oil supply pipe 250a and the cooling oil discharge pipe 250b, respectively.

특히, 본 발명에서는 냉각유 공급공(222)이 종래 기술과 차별적으로 공급측의 베어링 하우징(210a) 내부에 위치하도록 형성되어 있어, 냉각유의 공급이 베어링 하우징(210a) 내부에서 일어날 수 있도록 하고, 그에 따라 절삭유나 미세 칩 등의 유입을 방지할 수 있게 한다. In particular, in the present invention, the cooling oil supply hole 222 is formed so as to be located inside the bearing housing 210a on the supply side differently from the prior art, so that the supply of cooling oil can occur inside the bearing housing 210a, Therefore, it is possible to prevent the inflow of cutting oil or fine chips.

즉, 종래에는 외부 작업 환경과 직접 접하는 베어링 하우징(210a)의 외측에 냉각유 공급공(222)이 형성되어 있었음에 비해, 본 발명은 외부 작업 환경과 격리된 베어링 하우징(210a) 내부에 냉각유 공급공(222)이 형성되어 있어서 절삭유나 미세 칩 등의 유입을 방지할 수 있게 한다. That is, in the related art, the cooling oil supply hole 222 is formed on the outside of the bearing housing 210a which is in direct contact with the external working environment. However, the present invention provides the cooling oil in the bearing housing 210a that is isolated from the external working environment. The supply hole 222 is formed to prevent the introduction of cutting oil or fine chips.

볼 너트(230)는 도시 생략된 테이블, 공구대 또는 주축 등과 같은 이송부재와 결합되어 상기 이송부재를 직선왕복운동시키기 위한 것으로, 내주면에는 볼 스크류 축(220)의 외주면에 형성된 제1 볼홈과 대응하는 제2 볼홈(미도시)이 나선상으로 형성되어 있어, 제1 볼홈과 제2 볼홈 사이에 개재된 볼(ball)(미도시)에 의해 볼 스크류 축(220)과 볼 나사 결합된다.The ball nut 230 is coupled to a transfer member such as a table, a tool bar, or a main shaft (not shown) to linearly reciprocate the transfer member. An inner circumferential surface corresponds to a first ball groove formed on an outer circumferential surface of the ball screw shaft 220. The second ball groove (not shown) is formed in a spiral shape, the ball screw shaft 220 and the ball screw is coupled by a ball (not shown) interposed between the first ball groove and the second ball groove.

따라서, 볼 스크류 축(220)이 구동모터(M)의 구동에 의해 회전하면, 볼 스크류 축(220)의 회전방향에 따라 양측 베어링 하우징(210a, 210b) 사이에서 직선왕복운동하고, 그에 따라 상기 이송부재를 직선왕복운동시킨다.Therefore, when the ball screw shaft 220 is rotated by the drive of the drive motor (M), according to the rotational direction of the ball screw shaft 220 linearly reciprocating between the bearing housings (210a, 210b), thereby Linearly reciprocate the transfer member.

냉각유 실링유닛(240)은 상기 냉각유 공급공(222)과 마찬가지로 베어링 하우 징(210a) 내부에 장치되어 냉각유가 누유되는 것을 방지하기 위한 것으로, 냉각유 공급공(222)이 형성된 볼 스크류 축(220)의 외주면(혹은, 원주면)을 따라 결합된 오링(241)과 상기 오링(241)을 견고히 고정함과 동시에 외부 환경으로부터 차단하는 실링 하우징(242)을 포함하며, 실링 하우징(242)의 일측부에는 냉각유 공급공(222)과 연통하는 공급포트(243)가 형성되어 있다.The cooling oil sealing unit 240 is installed in the bearing housing 210a like the cooling oil supply hole 222 to prevent leakage of the cooling oil. The ball screw shaft having the cooling oil supply hole 222 is formed. An o-ring 241 coupled along the outer circumferential surface (or circumferential surface) of the 220 and a sealing housing 242 that firmly secures the o-ring 241 and blocks it from the external environment, the sealing housing 242 One side of the supply port 243 is formed in communication with the cooling oil supply hole (222).

또한, 도 3을 통해 좀 더 명확히 알 수 있는 바와 같이, 본 발명에 따른 실링 하우징(242)의 일측부에는 드레인홀(drain hole)(244)이 바닥면을 향해 관통하도록 형성되어 있는데, 이러한 드레인홀(244)은 실링 하우징(242)과 축 베어링(211a) 사이의 미세한 틈을 통해 수집된 누설 냉각유를 외부로 배출시킬 수 있도록 함으로써, 상기 누설 냉각유가 축 베어링(211a)까지 침투되는 것을 방지하고 해당 축 베어링(211a)이 손상되는 것을 방지한다.3, a drain hole 244 is formed at one side of the sealing housing 242 according to the present invention so as to penetrate toward the bottom surface. The hole 244 allows the leakage cooling oil collected through the minute gap between the sealing housing 242 and the shaft bearing 211a to be discharged to the outside, thereby preventing the leakage cooling oil from penetrating to the shaft bearing 211a. And prevent the shaft bearing 211a from being damaged.

냉각유 공급관(250a)은 볼 스크류 축(220)의 냉각유 순환통로(221)에 냉각유를 공급하기 위한 것으로, 이러한 냉각유 공급관(250a)은 실링 하우징(242)을 통해 공급포트(243)까지 연결되어 있다. 따라서, 공급포트(243)와 연통되어 있는 냉각유 공급공(222)을 통해 냉각유 순환통로(221)까지 냉각유를 공급할 수 있게 한다.The cooling oil supply pipe 250a is for supplying cooling oil to the cooling oil circulation passage 221 of the ball screw shaft 220. The cooling oil supply pipe 250a is supplied to the supply port 243 through the sealing housing 242. Connected to. Therefore, the cooling oil can be supplied to the cooling oil circulation passage 221 through the cooling oil supply hole 222 communicating with the supply port 243.

단, 본 발명에서의 냉각유 공급관(250a)은 복수개 설치되는 것이 바람직한데, 이와 같이 냉각유 공급관(250a)을 복수개 설치할 수 있는 이유는, 냉각유의 공급이 베어링 하우징(210a, 210b) 내부에서 이루어지므로 절삭유나 미세 칩 등의 유입이 발생할 가능성이 종래에 비해 매우 낮기 때문이다. However, in the present invention, it is preferable that a plurality of cooling oil supply pipes 250a be provided. The reason why the plurality of cooling oil supply pipes 250a can be provided in this way is that the supply of cooling oil is made in the bearing housings 210a and 210b. This is because the inflow of cutting oil, fine chips, etc. is very low compared to the prior art.

또한, 복수개의 냉각유 공급관(250a)을 통해 많은 양의 냉각유가 일시에 공 급된다 하더라도 드레인홀(244)에 의해 누유된 냉각유가 축 베어링(211a, 211b)까지 침투하지 못하도록 할 수도 있기 때문이다.In addition, even if a large amount of cooling oil is temporarily supplied through the plurality of cooling oil supply pipes 250a, cooling oil leaked by the drain hole 244 may not be penetrated to the shaft bearings 211a and 211b. .

한편, 베어링 하우징(210a)의 일측부에는 볼 스크류 축(220)이 삽입될 수 있도록 축공이 형성되어 있는데, 이때 상기 축공이 형성된 베어링 하우징(210a)의 일측 내부면에는 오일 실(oil seal)(212)을 설치하여, 외부 환경으로부터 절삭유나 미세 칩이 유입되는 것을 더욱더 방지할 수 있도록 하는 것이 바람직하다.Meanwhile, a shaft hole is formed at one side of the bearing housing 210a to allow the ball screw shaft 220 to be inserted. At this time, an oil seal is formed at one inner surface of the bearing housing 210a in which the shaft hole is formed. 212), it is preferable to further prevent the flow of cutting oil or fine chips from the external environment.

또한, 상기 축공이 형성된 베어링 하우징(210a, 210b)의 일단부에는 오일 실(212)을 덮도록 엔드캡(260)을 설치하여 해당 오일 실(212)의 탈착을 방지함은 물론 부수적으로 외부 환경과의 차단이 일어날 수 있도록 하는 것이 바람직하다.In addition, an end cap 260 may be installed at one end of the bearing housings 210a and 210b in which the shaft holes are formed to cover the oil seal 212, thereby preventing the oil seal 212 from being detached and, as a result, the external environment. It is desirable to allow blockages to occur.

이하, 상술한 바와 같은 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치에 대해 설명하도록 한다.Hereinafter, a ball screw device having a cooling device according to the present invention as described above will be described.

먼저, 양측 베어링 하우징(210a, 210b) 내부에 각각 장치된 축 베어링(211a, 211b)에 의해 안정적으로 지지된 볼 스크류 축(220)이 구동모터(M)의 구동에 의해 회전하면, 상기 볼 스크류 축(220)과 볼 나사 결합된 볼 너트(230)가 직선왕복운동을 함으로써, 볼 너트(230)에 결합된 이송부재 역시 직선왕복운동을 하면서 공작물을 가공할 수 있도록 한다.First, when the ball screw shaft 220, which is stably supported by the shaft bearings 211a and 211b respectively installed in the bearing housings 210a and 210b, rotates by driving of the driving motor M, the ball screw The ball nut 230 coupled to the shaft 220 and the ball screw has a linear reciprocating motion, so that the transfer member coupled to the ball nut 230 can also process the workpiece while performing a linear reciprocating motion.

한편, 상술한 바와 같이 공작물의 가공을 위해 볼 스크류 축(220)이 고속으로 회전하면 열이 발생하게 되므로 순환펌프(미도시)을 기동시켜 냉각유 저장 탱크(미도시)로부터 냉각유를 공급한다.On the other hand, as described above, since the ball screw shaft 220 rotates at a high speed for processing the workpiece, heat is generated to start the circulation pump (not shown) to supply cooling oil from the cooling oil storage tank (not shown). .

그러면, 냉각유가 냉각유 공급관(250a)과 공급포트(243) 및 냉각유 공급 공(222)을 순차적으로 통과하여 볼 스크류 축(220)의 중심부에 형성된 냉각유 순환통로(221)에 공급된다.Then, the cooling oil is sequentially passed through the cooling oil supply pipe 250a, the supply port 243 and the cooling oil supply hole 222 is supplied to the cooling oil circulation passage 221 formed in the center of the ball screw shaft 220.

공급된 냉각유는 냉각유 순환통로(221)를 경유하여 냉각유 배출공까지 흘러나간 다음 냉각유 배출관(250b)을 통해 배출되며, 그 과정에서 냉각유가 볼 스크류 축(220)은 물론 그 외 축 베어링(211a, 211b) 등에서 발생하는 열을 흡수하면서 냉각시킨다.The supplied cooling oil flows through the cooling oil circulation passage 221 to the cooling oil discharge hole and then is discharged through the cooling oil discharge pipe 250b. In the process, the cooling oil passes through the ball screw shaft 220 as well as the other shaft. It cools while absorbing the heat which generate | occur | produces in the bearings 211a, 211b, etc.

냉각유 배출관(250b)을 통해 배출된 냉각유는 도시 생략된 냉각기에 의해 냉각되어 냉각탱크로 공급되고, 다시 상기 순환펌프를 통해 재공급될 수도 있다.Cooling oil discharged through the cooling oil discharge pipe 250b is cooled by a cooler (not shown) and supplied to the cooling tank, and may be supplied again through the circulation pump.

이때, 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치(200)는 냉각유 공급공(222)과, 냉각유 실링유닛(240) 및 냉각유 공급관(250a)은 외부 환경으로부터 격리된 베어링 하우징(210a) 내부에 장치되어 있어 절연유나 미세 칩이 유입되는 것을 방지하고, 그에 따라 냉각유의 혼화에 의한 냉각 특성의 저하를 방지한다.At this time, the ball screw device 200 having a cooling device according to the present invention is a cooling oil supply hole 222, the cooling oil sealing unit 240 and the cooling oil supply pipe 250a is a bearing housing (isolated from the external environment) 210a) is provided inside to prevent the introduction of insulating oil or fine chips, thereby preventing the reduction of cooling characteristics due to mixing of the cooling oil.

또한, 베어링 하우징(210a, 210b)의 일측부에 형성된 축공에는 오일실(212)이 장치되어 있어 절연유나 미세칩이 유입되는 것을 더욱더 방지한다.In addition, the oil hole 212 is installed in the shaft hole formed at one side of the bearing housings 210a and 210b to further prevent the insulated oil or the microchip from flowing.

나아가, 실링 하우징(242)에 형성된 드레인홀(244)을 통해 누유된 냉각유가 축 베어링(211a)에 침투하는 것을 방지하도록 함으로써 축 베어링(211a)의 손상을 방지한다.Furthermore, damage to the shaft bearing 211a is prevented by preventing the cooling oil leaked through the drain hole 244 formed in the sealing housing 242 from penetrating the shaft bearing 211a.

이상, 본 발명의 특정 실시예에 대하여 상술하였다. 그러나, 본 발명의 사상 및 범위는 이러한 특정 실시예에 한정되는 것이 아니라, 본 발명의 요지를 변경하지 않는 범위 내에서 다양하게 수정 및 변형이 가능하다는 것을 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 이해할 것이다. In the above, the specific Example of this invention was described above. However, the spirit and scope of the present invention is not limited to these specific embodiments, and various changes and modifications can be made without departing from the spirit of the present invention. Those who have it will understand.

따라서, 이상에서 기술한 실시예들은 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이므로, 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 하며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다. Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

본 발명의 냉각장치를 구비한 볼 스크류 장치는 외부 작업환경으로부터 격리된 베어링 하우징의 내부에서 냉각유의 공급이 이루어지도록 함으로써 냉각유의 오염 및 냉각유 공급기의 손상을 방지할 수 있게 한다.The ball screw device with the cooling device of the present invention allows the cooling oil to be supplied inside the bearing housing isolated from the external working environment, thereby preventing contamination of the cooling oil and damage to the cooling oil supply.

또한, 누유된 냉각유를 배유시키는 드레인홀을 구비하여 축 베어링의 손상을 방지할 수 있게 한다.In addition, a drain hole for draining the leaked cooling oil is provided to prevent damage to the shaft bearing.

도 1은 종래 기술에 따른 냉각장치를 구비한 볼 스크류 장치를 나타낸 평단면도이다.1 is a plan sectional view showing a ball screw device having a cooling device according to the prior art.

도 2는 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치를 나타낸 평단면도이다.Figure 2 is a plan sectional view showing a ball screw device with a cooling device according to the present invention.

도 3은 본 발명에 따른 냉각장치를 구비한 볼 스크류 장치를 나타낸 정단면도이다.Figure 3 is a front sectional view showing a ball screw device having a cooling device according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

210a, 210b: 베어링 하우징 212: 오일 실210a, 210b: bearing housing 212: oil seal

220: 볼 스크류 축 221: 냉각유 순환통로220: ball screw shaft 221: cooling oil circulation passage

222: 냉각유 공급공 230: 볼 너트222: cooling oil supply hole 230: ball nut

240: 냉각유 실링유닛 241: 오링240: cooling oil sealing unit 241: O-ring

242: 실링 하우징 243: 공급포트242: sealing housing 243: supply port

244: 드레인홀 250a: 냉각유 공급관244: drain hole 250a: cooling oil supply pipe

250b: 냉각유 배출관 260: 엔드캡250b: cooling oil discharge pipe 260: end cap

Claims (4)

서로 소정 간격으로 이격되어 있는 공급측 베어링 하우징(210a)과 배출측 베어링 하우징(210b) 내부에 각각 장치되는 축 베어링(211a, 211b)과;Shaft bearings 211a and 211b respectively disposed in the supply side bearing housing 210a and the discharge side bearing housing 210b spaced apart from each other by a predetermined distance; 양단부가 상기 축 베어링(211a, 211b)에 각각 결합되고, 중심부에는 냉각유 순환통로(221)가 형성되어 있고, 일단부의 외경에는 상기 냉각유 순환통로(221)와 연통하는 냉각유 공급공(222)이 상기 공급측 베어링 하우징(210a)의 내부에 형성된 유로와 연통되도록 형성되어 있으며, 타단부에는 상기 냉각유 순환통로(221)와 연통하는 냉각유 배출공이 형성되어 있는 볼 스크류 축(220)과;Both ends are coupled to the shaft bearings 211a and 211b, respectively, and a cooling oil circulation passage 221 is formed at a central portion thereof, and a cooling oil supply hole 222 communicating with the cooling oil circulation passage 221 at an outer diameter of one end portion. A ball screw shaft 220 having a cooling oil discharge hole communicating with the cooling oil circulation passage 221 formed at the other end thereof, and the other end portion communicating with a flow path formed in the supply-side bearing housing 210a; 상기 볼 스크류 축(220)과 볼 나사 결합되어, 상기 볼 스크류 축(220)의 회전 방향에 따라 직선왕복운동을 하는 볼 너트(230)와;A ball nut 230 coupled to the ball screw shaft 220 and performing a linear reciprocating motion according to the rotational direction of the ball screw shaft 220; 상기 공급측 베어링 하우징(210a) 내부에서, 상기 냉각유 공급공(222)이 형성된 볼 스크류 축(220)의 외주면을 감싸도록 결합된 냉각유 실링유닛(240); 및A cooling oil sealing unit (240) coupled to the outer circumferential surface of the ball screw shaft (220) in which the cooling oil supply hole (222) is formed in the supply side bearing housing (210a); And 상기 냉각유 실링유닛(240)을 관통하여 상기 냉각유 공급공(222)과 연결된 냉각유 공급관(250a);A cooling oil supply pipe 250a penetrating through the cooling oil sealing unit 240 and connected to the cooling oil supply hole 222; 을 포함하는 것을 특징으로 하는 냉각장치를 구비한 볼 스크류 장치(200).Ball screw device having a cooling device, characterized in that it comprises a (200). 제1항에 있어서,The method of claim 1, 상기 볼 스크류 축(220)이 삽입되도록 축공이 형성된 상기 공급측 베어링 하우징(210a)의 일측 내주면에는 오일 실(oil seal)(212)이 삽입 설치되어 있는 것을 특징으로 하는 냉각장치를 구비한 볼 스크류 장치(200).A ball screw device with a cooling device, characterized in that an oil seal 212 is inserted into one side inner circumferential surface of the supply side bearing housing 210a in which a shaft hole is formed so that the ball screw shaft 220 is inserted. (200). 제1항에 있어서,The method of claim 1, 상기 냉각유 실링유닛(240)은 상기 냉각유 공급공(222)이 형성된 볼 스크류 축(220)의 외주면을 따라 결합된 오링(241)과 상기 오링(241)을 감싸도록 설치된 실링 하우징(242)을 포함하며, 상기 실링 하우징(242)에는 누유된 냉각유를 외부로 배유시키는 드레인홀(drain hole)(244)이 형성되어 있는 것을 특징으로 하는 냉각장치를 구비한 볼 스크류 장치.The cooling oil sealing unit 240 is a sealing housing 242 installed to surround the O-ring 241 and the O-ring 241 coupled along the outer circumferential surface of the ball screw shaft 220 in which the cooling oil supply hole 222 is formed. And a drain hole (244) configured to drain leaked cooling oil to the outside in the sealing housing (242). 제1항에 있어서,The method of claim 1, 상기 냉각유 공급공(222)과 냉각유 공급관(250a)은 각각 2개이상씩 구비되어 서로 연통되는 것을 특징으로 하는 냉각장치를 구비한 볼 스크류 장치(200).The cooling oil supply hole (222) and the cooling oil supply pipe (250a) is provided with two or more respectively, the ball screw device having a cooling device, characterized in that the communication device.
KR1020070131895A 2007-12-17 2007-12-17 Ball screw apparatus having cooing unit KR20090064627A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107877257A (en) * 2017-12-26 2018-04-06 广东圣特斯数控设备有限公司 The X-axis and Z axis radiator structure of a kind of Digit Control Machine Tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107877257A (en) * 2017-12-26 2018-04-06 广东圣特斯数控设备有限公司 The X-axis and Z axis radiator structure of a kind of Digit Control Machine Tool
CN107877257B (en) * 2017-12-26 2023-08-11 广东圣特斯数控设备有限公司 X-axis and Z-axis heat radiation structure of numerical control machine tool

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