KR20010036991A - a nozzle insert type fluid providing device for preventing counterflow - Google Patents

a nozzle insert type fluid providing device for preventing counterflow Download PDF

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Publication number
KR20010036991A
KR20010036991A KR1019990044247A KR19990044247A KR20010036991A KR 20010036991 A KR20010036991 A KR 20010036991A KR 1019990044247 A KR1019990044247 A KR 1019990044247A KR 19990044247 A KR19990044247 A KR 19990044247A KR 20010036991 A KR20010036991 A KR 20010036991A
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KR
South Korea
Prior art keywords
tool
nozzle
fluid
fluid supply
draw bar
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KR1019990044247A
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Korean (ko)
Inventor
김창회
Original Assignee
김재복
위아 주식회사
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Priority to KR1019990044247A priority Critical patent/KR20010036991A/en
Publication of KR20010036991A publication Critical patent/KR20010036991A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q11/00Accessories 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
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • B23Q11/1015Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q11/00Accessories 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
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • B23Q11/1084Arrangements for cooling or lubricating tools or work specially adapted for being fitted to different kinds of machines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

PURPOSE: A reverse flow preventing nozzle inserting type fluid providing device improves the ability of cutting and the life of a tool and prevents a reverse flow due to a blocking phenomenon. CONSTITUTION: If a collet(5) holding a connecting end portion(9) of a tool(3) is moved, a nozzle(6) is inserted into the connecting end portion(9) of the tool(3). At the moment, an impact is damped by a coil spring(8) mounted in the inner portion of a draw bar(4). A fluid maintaining a pressure provided to a fluid providing passage(2) constant such as a cutting fluid compresses the coil spring(8) with pushing a ball(7). Then the fluid is provided through a leak between the passage(2) and the ball(7) to the tool(3). At the moment probable leakage of the fluid is prevented by O-rings(10) contacted to the nozzle(6). Further, if a reverse flow phenomenon is generated, the reverse flow is prevented by the interception of the passage(2) by the elastically biased ball(7).

Description

역류방지용 노즐삽입식 유체공급장치{a nozzle insert type fluid providing device for preventing counterflow}A nozzle insert type fluid providing device for preventing counterflow

본 발명은 예를 들어 공작기계의 주축대에 설치된 스핀들 축심으로 유체를 공급하는 유체공급장치에 관한 것으로, 특히 공압이나 유압 모두 적용가능하면서 스핀들의 축심을 통하여 공구쪽으로 절삭유와 같은 유체를 공급하는 역류방지용 노즐삽입식 유체공급장치에 관한 것이다.The present invention relates to a fluid supply device for supplying fluid to, for example, a spindle shaft installed in a main shaft of a machine tool. In particular, a backflow for supplying fluid such as cutting oil to a tool through a spindle center while being applicable to both pneumatic and hydraulic pressure Preventive nozzle insertion type fluid supply apparatus.

일반적으로 공작기계의 스핀들 축심을 통하여 공구쪽으로 공급되는 유압(流壓)은 주로 공압이 이용되는바, 이 공압은 스핀들의 축심에 형성된 공압라인을 통하여 공구에 전달됨에 따라 공작물 가공시 공구에서 공압이 작용하여 절삭가공을 수행하도록 되어 있다.In general, the hydraulic pressure (流 壓) supplied to the tool through the spindle axis of the machine tool is mainly used by pneumatic pressure, which is transmitted to the tool through the pneumatic line formed at the spindle axis of the machine tool. To perform cutting.

즉, 이러한 종래 공압 공급장치를 살펴 보면, 도 1에 도시된 바와 같이 스핀들(101)의 축심에는 공압통로(102)를 갖춘 드로우바아(104)가 장착되고, 이 드로우바아(104)의 헤드부(104a)를 콜렛(105)이 감싸되, 이 콜렛(105)의 선단부쪽으로 공구(103)의 연결단부(109)가 삽입 및 이탈되는 구조로 되어 있다.That is, referring to the conventional pneumatic supply device, as shown in FIG. 1, a drawbar 104 having a pneumatic passage 102 is mounted at an axis of the spindle 101, and the head of the drawbar 104 is mounted. The collet 105 is wrapped around 104a, and the connecting end 109 of the tool 103 is inserted and detached toward the distal end of the collet 105.

이같은 종래 공압 공급장치는 상기 공구(103)의 연결단부(109)를 콜렛(105)에 클램프할때, 드로우바아(104)가 도면중 우측으로 후진하게 되는데 이때 공압통로(102)를 통하여 공압을 공급하게 되면, 이 후진된 드로우바아(104)가 전진하여 콜렛(105)을 밀어 내면서 이의 헤드(104a)가 공구(103)의 연결단부(109)에 연결된다.Such a conventional pneumatic supply device, when the connection end 109 of the tool 103 is clamped to the collet 105, the draw bar 104 is reversed to the right in the drawing, when the pneumatic passage 102 When fed, the retracted drawbar 104 advances and pushes the collet 105 so that its head 104a is connected to the connecting end 109 of the tool 103.

따라서 상기 공압통로(102)를 통하여 공압이 공구쪽으로 공급되어지도록 되어 있다.Therefore, pneumatic pressure is supplied to the tool through the pneumatic passage 102.

그러나 종래 이러한 공급구조는 단지 공압통로를 통해서만 공압이 전달되고 기타 다른 유체 예컨대, 수용성 및 비수용성 유체는 공급할 수가 없게 되어 공구의 절삭성을 저하시킬 뿐만 아니라 결국 공구의 수명도 저감시키게 되는 문제점이 제기되어 왔다.However, such a supply structure conventionally raises a problem that the pneumatic pressure is transmitted only through the pneumatic passage, and other fluids such as water-soluble and non-aqueous fluids cannot be supplied, thereby reducing the tool's machinability and eventually reducing the tool's life. come.

이에 본 발명은 상기와 같은 종래 문제점을 해결하기 위하여 발명된 것으로, 스핀들의 축심에 형성된 유체공급통로를 통하여 공구쪽으로 유체를 공급하여 공구의 절삭성과 수명을 향상시킬 뿐만 아니라 유체공급시에 외부의 영향으로 막힘현상이 야기될때 역류를 방지한 개량된 역류방지용 노즐삽입식 유체공급장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been invented to solve the conventional problems as described above, by supplying the fluid toward the tool through the fluid supply passage formed in the shaft center of the spindle to improve the cutting and life of the tool as well as the external influence during the fluid supply It is an object of the present invention to provide an improved non-return nozzle insert-type fluid supply device that prevents reverse flow when clogging occurs.

도 1은 종래 유체 공급부가 적용된 공작기계의 주축대의 부분단면도,1 is a partial cross-sectional view of a main shaft of a machine tool to which a conventional fluid supply unit is applied;

도 2는 본 발명에 따른 유체공급장치의 단면도로서, 도 1에 대응되는 단면도이다.2 is a cross-sectional view of the fluid supply apparatus according to the present invention, which corresponds to FIG.

-도면의 주요부분에 대한 부호의 설명-Explanation of symbols on the main parts of the drawing

1 : 스핀들 2 : 유체공급통로1: Spindle 2: Fluid Supply Path

3 : 공구 4 : 드로우바아(draw bar)3: tool 4: draw bar

4a : 헤드 5 : 콜렛(collet)4a: head 5: collet

6 : 노즐 7 : 보올6: nozzle 7: bowl

8 : 코일스프링 9 : 연결단부8: coil spring 9: connection end

10 : O-링10: O-ring

상기와 같은 목적을 달성하기 위한 본 발명은 스핀들의 축심을 따라 형성된 유체공급통로를 거쳐 공구 쪽으로 유압을 공급하는 공구삽입식 유체공급장치에 있어서, 상기 스핀들의 축심을 따라 장착된 드로우바아의 헤드가 콜렛에 끼워 장착되되, 이 드로우바아의 내부 축심에는 노즐이 관통삽입되고 이 노즐의 일단에 보올을 보유지지한 코일스프링이 탄지되어 설치되어 있으며, 상기 드로우바아의 헤드 쪽으로 연장되는 노즐은 공구의 연결단부에 삽입되는 구조로 되어 있다.The present invention for achieving the above object is a tool-insertable fluid supply device for supplying hydraulic pressure toward the tool through a fluid supply passage formed along the axis of the spindle, the head of the draw bar mounted along the axis of the spindle The drawbar is inserted into the collet, and a nozzle is penetrated into the inner shaft of the drawbar, and a coil spring holding the ball at one end of the nozzle is supported. It is a structure inserted into an end part.

그리고 상기 코일스프링으로 탄지된 보올은 유체공급통로를 개폐시키는 체크밸브역할을 수행하고 드로우바아의 헤드 내부와 공구의 연결단부 내부에는 기밀을 유지하는 O-링들이 장착되어 있다.The ball held by the coil spring serves as a check valve to open and close the fluid supply passage, and O-rings are installed inside the head of the draw bar and inside the connection end of the tool.

이하, 본 발명을 첨부된 예시도면에 의거 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 역류방지용 노즐삽입식 유체공급장치가 공작기계의 주축대 스핀들에 장착된 상태를 나타낸 도면으로, 본 발명은 이에 한정되는 것이 아니고 이와 유사한 분야에서도 다양하게 적용될 수 있음을 미리 밝혀둔다.2 is a view illustrating a state in which a backflow preventing nozzle insert type fluid supply device according to the present invention is mounted on a spindle spindle of a machine tool, and the present invention is not limited thereto, and may be variously applied in a similar field in advance. Reveal.

본 발명은 스핀들(1)의 축심을 따라 형성된 유체공급통로(2)를 거쳐 공구(3) 쪽으로 유압을 공급하는 공구삽입식 유체공급장치에 있어서, 상기 스핀들(1)의 축심을 따라 장착되는 드로우바아(4)의 헤드(4a)가 콜렛(5)에 끼워장착되되, 이 드로우바아(4)의 내부 축심에는 노즐(6)이 관통삽입되고, 이 노즐(6)의 일단에 보올(7)을 보유지지한 코일스프링(8)이 탄지되어 있으며, 상기 드로우바아(4)의 헤드(4a) 쪽으로 연장되는 노즐(6)은 공구(3)의 연결단부(9)에 삽입되는 구조로 되어 있다.The present invention provides a tool-insertable fluid supply device for supplying hydraulic pressure toward a tool (3) via a fluid supply passage (2) formed along the axis of the spindle (1), the draw is mounted along the axis of the spindle (1) The head 4a of the bar 4 is fitted to the collet 5, and a nozzle 6 is inserted through the inside shaft of the draw bar 4, and a bowl 7 is inserted into one end of the nozzle 6. The coil spring 8 holding the holder is supported, and the nozzle 6 extending toward the head 4a of the draw bar 4 is inserted into the connecting end 9 of the tool 3. .

여기서 상기 코일스프링(8)으로 탄지된 보올(9)은 유체공급통로(2)에서 일방향으로 유체를 공급할 수 있는 체크밸브기능을 갖추고 있으며, 상기 드로우바아(4)의 헤드(4a) 내부와 공구(3)의 연결단부(9) 내부는 노즐(6)과 접하여 기밀이 유지될 수 있도록 각각 O-링들(10)이 장착되어 있다.Here, the bowl 9 supported by the coil spring 8 has a check valve function for supplying fluid in one direction from the fluid supply passage 2, and the inside of the head 4a of the draw bar 4 and the tool. Inside the connecting end 9 of (3), each of the O-rings 10 is mounted so that the airtightness can be maintained in contact with the nozzle 6.

이와 같이 이루어진 본 발명은 콜렛(5)이 공구(3)의 연결단부(9)를 잡고 도 2의 우측방향으로 이동하게 되면 노즐(6)은 이 공구(3)의 연결단부(9)에 삽입되게 되는데, 이때 충격은 상기 드로우바아(4)의 내부에 장착된 코일스프링(8)에 의하여 완충되어 진다.According to the present invention, the nozzle 6 is inserted into the connecting end 9 of the tool 3 when the collet 5 grasps the connecting end 9 of the tool 3 and moves in the right direction of FIG. 2. In this case, the shock is cushioned by the coil spring 8 mounted inside the draw bar 4.

이 상태에서 유체공급통로(2)로 공급되는 일정압을 유지하는 절삭유와 같은 유체가 보올(7)을 밀면서 코일스프링(8)을 압축시키게 되는바, 그러면 상기 유체공급통로(2)와 보올(7) 사이에 형성된 틈새로 유체가 도면중 왼쪽 방향으로 공급되어 이 노즐(6)을 거쳐 연결단부(9)를 통하여 공구(3)쪽으로 공급되어지는데, 이때 야기될 수 있는 공급되는 유체의 누유는 상기 드로우바아(4)의 헤드(4a)와 공구(3)의 연결단부(9)에서 노즐(6)에 접하는 o-링들(10)에 의하여 차단되어 진다.In this state, a fluid such as cutting oil that maintains a constant pressure supplied to the fluid supply passage 2 compresses the coil spring 8 while pushing the bowl 7, and then the fluid supply passage 2 and the bowl ( 7) Fluid is supplied in the left direction in the figure through the gap formed between the nozzles 6 and through the connecting end 9 to the tool 3, where the leakage of the supplied fluid may be caused. It is blocked by o-rings 10 in contact with the nozzle 6 at the connecting end 9 of the head 4a of the drawbar 4 and the tool 3.

또한, 상기 유체공급통로(2)로 공급되는 유체가 외부의 조건에 의해 막힘현상 등이 발생하여 역류현상이 발생하게 되면, 상기 역압이 코일스프링(8)에 의해 탄지된 보올(7)이 드로우바아(4)의 유체공급통로(2)를 차단하여 절삭유가 역류되지 않도록 되어 있다.In addition, when the fluid supplied to the fluid supply passage 2 is clogged due to external conditions, and a back flow phenomenon occurs, the bowl 7 whose back pressure is supported by the coil spring 8 is drawn. The fluid supply passage 2 of the bar 4 is blocked to prevent the cutting oil from flowing back.

상기와 같이 본 발명은 공구를 통하여 절삭유와 같은 유체를 공급하여 공구의 절삭성과 수명을 향상시키면서 외부에 의하여 공급되는 유체의 역류현상도 차단할 수 있는 잇점 등을 갖추게 된다.As described above, the present invention has an advantage that the backflow phenomenon of the fluid supplied from the outside can be blocked while supplying a fluid such as cutting oil through the tool to improve the cutting property and the life of the tool.

Claims (2)

스핀들(1)의 축심을 따라 형성된 유체공급통로(2)를 거쳐 공구(3) 쪽으로 유압을 공급하는 공구삽입식 유체공급장치에 있어서,In the tool-insertable fluid supply device for supplying hydraulic pressure toward the tool (3) via the fluid supply passage (2) formed along the axis of the spindle (1), 상기 스핀들(1)의 축심을 따라 장착되는 드로우바아(4)의 헤드(4a)가 콜렛(5)에 끼워장착되되, 이 드로우바아(4)의 내부 축심에는 노즐(6)이 관통삽입되고, 이 노즐(6)의 일단에 보올(7)을 보유지지한 코일스프링(8)이 탄지되어 있으며, 상기 드로우바아(4)의 헤드(4a) 쪽으로 연장되는 노즐(6)은 공구(3)의 연결단부(9)에 삽입되어 이루어진 것을 특징으로 하는 역류방지용 노즐삽입식 유체공급장치.The head 4a of the draw bar 4, which is mounted along the shaft center of the spindle 1, is fitted to the collet 5, and the nozzle 6 is inserted through the inner shaft of the draw bar 4, The coil spring 8 holding the bowl 7 is held at one end of the nozzle 6, and the nozzle 6 extending toward the head 4a of the draw bar 4 is formed of the tool 3. Back flow prevention nozzle insertion type fluid supply device, characterized in that the insertion end is inserted into the (9). 제 1항에 있어서, 상기 드로우바아(4)의 헤드(4a) 내부와 공구(3)의 연결단부(9) 내부는 노즐(6)과 접하여 기밀이 유지될 수 있도록 각각 O-링들(10)이 장착되어 이루어진 것을 특징으로 하는 역류방지용 노즐삽입식 유체공급장치.The O-rings (10) according to claim 1, wherein the inside of the head (4a) of the draw bar (4) and the inside of the connecting end (9) of the tool (3) are in contact with the nozzle (6) so that airtightness can be maintained. Back flow prevention nozzle insertion type fluid supply device, characterized in that made is equipped with.
KR1019990044247A 1999-10-13 1999-10-13 a nozzle insert type fluid providing device for preventing counterflow KR20010036991A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150093209A1 (en) * 2013-10-01 2015-04-02 Fanuc Corporation Attachment structure for main spindle and tool holder of machine tool
KR20160097522A (en) * 2015-02-09 2016-08-18 두산공작기계 주식회사 Clamping device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150093209A1 (en) * 2013-10-01 2015-04-02 Fanuc Corporation Attachment structure for main spindle and tool holder of machine tool
US9511462B2 (en) * 2013-10-01 2016-12-06 Fanuc Corporation Attachment structure for main spindle and tool holder of machine tool
KR20160097522A (en) * 2015-02-09 2016-08-18 두산공작기계 주식회사 Clamping device

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