KR100869138B1 - Mandrel chuck - Google Patents

Mandrel chuck Download PDF

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Publication number
KR100869138B1
KR100869138B1 KR1020080026484A KR20080026484A KR100869138B1 KR 100869138 B1 KR100869138 B1 KR 100869138B1 KR 1020080026484 A KR1020080026484 A KR 1020080026484A KR 20080026484 A KR20080026484 A KR 20080026484A KR 100869138 B1 KR100869138 B1 KR 100869138B1
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KR
South Korea
Prior art keywords
workpiece
holder
housing
stopper
mandrel chuck
Prior art date
Application number
KR1020080026484A
Other languages
Korean (ko)
Inventor
김종영
임종식
Original Assignee
대양산업(주)
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Priority to KR1020080026484A priority Critical patent/KR100869138B1/en
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Publication of KR100869138B1 publication Critical patent/KR100869138B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/16—Damping of vibrations
    • 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
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means

Abstract

A mandrel chuck is provided to improve working efficiency by preventing workpiece from being shaken without supporting the leading edge using an additional center. A mandrel chuck comprises a housing(10) equipped with a holder insertion unit(15) located between a stopper supporting unit(12) and a workpiece supporting unit(13); a holder(60) supporting the inner surface of the workpiece(1) inserted in the housing; a spring(70) which is connected to the holder and elastically presses the holder toward the front and a fixing unit(16) which support in order for the holder not to be separated from the holder insertion unit(15).

Description

맨드렐 척{mandrel chuck}Mandrel chuck}

본 발명은 피가공물을 고정할 때 작업자가 부상을 입거나 피가공물에 손상이 발생되는 것을 방지하고, 별도의 센터를 이용하여 선단부를 지지하지 않아도 피가공물이 진동하는 것을 방지할 수 있도록 된 새로운 구조의 맨드렐 척에 관한 것이다.The present invention is to prevent the worker from injuring or damage to the workpiece when fixing the workpiece, and to prevent the workpiece to vibrate without supporting the tip using a separate center It's about the Mandrel Chuck.

일반적으로, 공작기계에 설치되어, 통형상의 피가공물을 지지하는 맨드렐 척은 도 1에 도시한 바와 같이, 중앙부에 전후방향의 결합공(14)이 형성되고 선단부 둘레면에는 내외부를 관통하는 관통공(13a)이 형성되며 기단부가 상기 공작기계에 결합되어 선단부 외부에 끼움결합된 피가공물(1)을 지지하는 하우징(10)과, 상기 하우징(10)의 관통공(13a)에 출몰가능하게 설치되는 처킹조(20)와, 상기 하우징(10)의 결합공(14)에 전후진가능하게 설치되며 둘레부에는 상기 처킹조(20)가 안착되는 경사면(31)이 형성된 드로우바(30)와, 상기 하우징(10)의 기단부 둘레에 구비되어 하우징(10)에 끼워진 피가공물(1)의 위치를 제한하는 스토퍼(40)로 이루어지며, 상기 하우징(10)의 중간부 외부에는 스페이서(50)가 끼움결합된다.In general, a mandrel chuck installed in a machine tool to support a cylindrical workpiece, as shown in FIG. A through hole (13a) is formed and the base end is coupled to the machine tool and can be mounted on the housing (10) for supporting the workpiece (1) fitted to the outside of the tip, and the through hole (13a) of the housing (10) A draw bar 30 having a chucking tank 20 to be installed so as to be movable forward and backward in the coupling hole 14 of the housing 10 and having an inclined surface 31 on which the chucking tank 20 is seated at a circumferential portion thereof. ) And a stopper 40 provided around the proximal end of the housing 10 to limit the position of the workpiece 1 fitted to the housing 10, and a spacer (outside the middle of the housing 10). 50) are fitted.

이때, 상기 하우징(10)은 공작기계의 베이스(2)에 고정되는 디스크형상의 고정부(11)와, 상기 고정부(11)의 전방으로 돌출되어 둘레부에 상기 스토퍼(40)가 고정되는 스토퍼지지부(12)와, 상기 스토퍼지지부(12)의 전방으로 돌출되어 외부에 피가공물(1)을 끼울 수 있도록 된 피가공물 지지부(13)로 이루어지고, 상기 결합공(14)은 상기 고정부(11)와 스토퍼지지부(12) 및 피가공물 지지부(13)를 관통하도록 형성되며, 상기 관통공(13a)은 피가공물 지지부(13)의 선단부 둘레에 형성된다.At this time, the housing 10 is a disk-shaped fixing portion 11 fixed to the base 2 of the machine tool, and protrudes in front of the fixing portion 11 is the stopper 40 is fixed to the periphery The stopper support part 12 and the workpiece support part 13 which protrudes in front of the stopper support part 12 so that the workpiece 1 can be fitted to the outside, and the coupling hole 14 is the fixed part. (11) and the stopper support part 12 and the workpiece support part 13, and the through hole 13a is formed around the tip end of the workpiece support part 13.

따라서, 상기 하우징(10)의 피가공물 지지부(13)에 통형상의 피가공물(1)을 끼운 후 상기 드로우바(30)를 하우징(10)의 기단쪽으로 후진시키면, 드로우바(30)의 경사면(31)에 의해 처킹조(20)가 하우징(10)의 외부로 돌출되어 피가공물(1)의 내부면에 밀착가압되므로써, 피가공물(1)이 움직이지 않도록 고정할 수 있다.Therefore, when the cylindrical bar 1 is inserted into the workpiece support 13 of the housing 10 and the draw bar 30 is retracted toward the proximal end of the housing 10, the inclined surface of the draw bar 30 is provided. By the 31, the chucking tank 20 protrudes to the outside of the housing 10, and is pressed against the inner surface of the to-be-processed object 1, and can fix it so that the to-be-processed object 1 does not move.

이때, 상기 피가공물(1)은 기단부가 상기 스토퍼(40)의 선단부에 밀착되어 더 이상 하우징(10)의 기단부쪽으로 움직이지 않도록 고정된다.At this time, the workpiece 1 is fixed so that the proximal end is in close contact with the distal end of the stopper 40 and no longer moves toward the proximal end of the housing 10.

그런데, 이러한 맨드렐 척은 작업자가 수작업으로 피가공물(1)을 하우징(10)의 외부에 끼우게 되는데, 피가공물(1)을 끼우는 작업중에 피가공물(1)이 의도하지 않게 빨리 슬라이드되어 스토퍼(40)에 부딪히므로써, 작업자의 손이 피가공물(1)과 스토퍼(40)의 사이에 끼어 부상을 입을 수 있을 뿐 아니라, 피가공물(1)이 스토퍼(40)나 하우징(10)에 강하게 부딪혀 손상될 수 있는 문제점이 있었다.By the way, the mandrel chuck is inserted into the workpiece (1) to the outside of the housing 10 by the operator by hand, the workpiece (1) unintentionally slides quickly and stops during the work to insert the workpiece (1) By hitting (40), the operator's hand may be caught between the workpiece (1) and the stopper (40) and injured, and the workpiece (1) may be damaged by the stopper (40) or the housing (10). There was a problem that could be strongly hit and damaged.

또한, 이러한 맨드렐 척은 피가공물(1)의 내측면에 밀착되는 처킹조(20)만을 이용하여 피가공물(1)을 고정하므로, 피가공물(1)을 충분히 지지하기 어려웠다. 따라서, 맨드렐 척과 피가공물(1)을 함께 고속으로 회전시킬 경우 진동이 발생되므로, 상기 드로우바(30)의 선단부에 별도의 센터(3)를 연결하여, 진동이 발생되지 않도록 드로우바(30)를 보강하여야 하므로, 작업준비시간이 길어지고, 작업효율이 떨어지게 되는 문제점이 있었다.In addition, since the mandrel chuck fixes the workpiece 1 using only the chucking tank 20 in close contact with the inner surface of the workpiece 1, it is difficult to sufficiently support the workpiece 1. Therefore, when the mandrel chuck and the workpiece 1 are rotated together at a high speed, vibration is generated, so that a separate center 3 is connected to the distal end of the draw bar 30 so that the vibration is not generated. ), Because the work preparation time is long, there is a problem that the work efficiency is reduced.

본 발명은 상기의 문제점을 해결하기 위한 것으로서, 피가공물(1)을 고정할 때 작업자가 부상을 입거나 피가공물(1)에 손상이 발생되는 것을 방지하고, 별도의 센터를 이용하여 선단부를 지지하지 않아도 피가공물(1)이 진동하는 것을 방지하여 작업효율을 향상시킬 수 있도록 된 새로운 구조의 맨드렐 척을 제공함에 그 목적이 있다.The present invention is to solve the above problems, to prevent the worker from being injured or damage to the workpiece (1) when fixing the workpiece (1), to support the tip using a separate center The object is to provide a mandrel chuck of a new structure that can prevent the workpiece 1 from vibrating to improve work efficiency.

상기한 목적을 달성하기 위한 본 발명은, 공작기계의 베이스(2)에 고정되는 고정부(11)와, 상기 고정부(11)의 전방으로 돌출되어 둘레부에 상기 스토퍼(40)가 고정되는 스토퍼지지부(12)와, 스토퍼지지부(12)의 전방으로 돌출되어 외부에 피가공물(1)을 끼울 수 있도록 된 피가공물 지지부(13)와, 상기 고정부(11)로부터 피가공물 지지부(13)까지 연장되는 결합공(14)과, 상기 피가공물 지지부(13)의 둘레면 에 형성된 관통공(13a)을 갖춘 하우징(10)과; 상기 하우징(10)의 관통공(13a)에 출몰가능하게 설치되는 처킹조(20)와; 상기 하우징(10)의 결합공(14)에 전후진가능하게 설치되며 둘레부에는 상기 처킹조(20)가 안착되는 경사면(31) 형성된 드로우바(30)와; 상기 하우징(10)의 스토퍼지지부(12) 둘레에 구비되어 하우징(10)에 끼워진 피가공물(1)의 위치를 제한하는 스토퍼(40);를 포함하는 맨드렐 척에 있어서,The present invention for achieving the above object, the fixing portion 11 is fixed to the base 2 of the machine tool, and the stopper 40 is projected to the front of the fixing portion 11 is fixed to the peripheral portion The stopper support part 12, the workpiece support part 13 which protrudes in front of the stopper support part 12, and the workpiece | work 1 can be fitted to the outside, and the workpiece support part 13 from the said fixing part 11 A housing (10) having a coupling hole (14) extending to and a through hole (13a) formed in the circumferential surface of the workpiece support portion (13); A chucking tank 20 which is installed in the through-hole 13a of the housing 10 so as to be protruding from the housing 10; A drawbar 30 formed on the coupling hole 14 of the housing 10 so as to be moved forward and backward and formed on an inclined surface 31 on which the chucking tank 20 is seated; In the mandrel chuck comprising: a stopper (40) provided around the stopper support part (12) of the housing (10) to limit the position of the workpiece (1) fitted in the housing (10),

상기 하우징(10)에는 상기 스토퍼지지부(12)와 상기 피가공물 지지부(13)의 사이에 위치된 홀더삽입부(15)가 더 구비되고, 상기 하우징(10)의 홀더삽입부(15)에 전후진 가능하게 끼움결합되어 하우징(10)에 끼워진 피가공물(1)의 내부면을 지지하는 홀더(60)와; 상기 홀더(60)에 연결되어 홀더(60)를 전방쪽으로 탄성가압하는 스프링(70)과; 상기 홀더삽입부(15)의 외주면에 구비되어 상기 홀더(60)가 홀더삽입부(15)에서 이탈되지 않도록 지지하는 걸림부(16); 가 더 구비된 것을 특징으로 하는 구조로 되어있다.The housing 10 further includes a holder inserting portion 15 positioned between the stopper support portion 12 and the workpiece support portion 13, and the front and rear of the holder inserting portion 15 of the housing 10. A holder (60) supporting the inner surface of the workpiece (1) which is fitted in the housing (10) by being possible to be coupled to the housing (10); A spring 70 connected to the holder 60 to elastically press the holder 60 forward; A catching portion 16 provided on an outer circumferential surface of the holder inserting portion 15 to support the holder 60 so as not to be separated from the holder inserting portion 15; Has a structure characterized in that it is further provided.

본 발명에 따른 맨드렐 척은 하우징(10)의 외부에 전후진 가능하게 끼움결합된 홀더(60)가 피가공물(1)의 내부에 삽입되어 지지하므로써, 피가공물(1)을 하우징(10)에 끼울 때 피가공물(1)이 의도하지 않은 빠른 속도로 하우징(10)에 끼워져 작업자가 손을 다치는 것을 방지할 수 있을 뿐 아니라, 별도의 센터를 이용하여 선단부를 지지하지 않아도 피가공물(1)이 진동하지 않게 되므로, 작업준비시간을 줄이고 작업효율을 향상시킬 수 있는 장점이 있다.The mandrel chuck according to the present invention supports the workpiece 1 by inserting and supporting the workpiece 1 in the interior of the workpiece 1 such that the holder 60, which is fitted back and forth to the outside of the housing 10, is supported. The workpiece 1 is inserted into the housing 10 at an unintended high speed when inserted into the housing 10, thereby preventing an operator from injuring his or her hand, and the workpiece 1 does not need to be supported by a separate center. Since it does not vibrate, there is an advantage that can reduce the work preparation time and improve the work efficiency.

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

도 2내지 도 5에 의하면, 본 발명에 따른 맨드렐 척은, 공작기계의 베이스(2)에 고정되는 고정부(11)와, 상기 고정부(11)의 전방으로 돌출되어 둘레부에 상기 스토퍼(40)가 고정되는 스토퍼지지부(12)와, 스토퍼지지부(12)의 전방으로 돌출되어 외부에 피가공물(1)을 끼울 수 있도록 된 피가공물 지지부(13)와, 상기 고정부(11)로부터 피가공물 지지부(13)까지 연장되는 결합공(14)과, 상기 피가공물 지지부(13)의 둘레면에 형성된 관통공(13a)을 갖춘 하우징(10)과; 상기 하우징(10)의 관통공(13a)에 출몰가능하게 설치되는 처킹조(20)와; 상기 하우징(10)의 결합공(14)에 전후진가능하게 설치되며 둘레부에는 상기 처킹조(20)가 안착되는 경사면(31) 형성된 드로우바(30)와; 상기 하우징(10)의 스토퍼지지부(12) 둘레에 구비되어 하우징(10)에 끼워진 피가공물(1)의 위치를 제한하는 스토퍼(40)가 구비되어, 통형상의 피가공물(1)을 상기 하우징(10)의 피가공물 지지부(13)에 끼워 고정할 수 있도록 된 것은 종래와 동일하다.2 to 5, the mandrel chuck according to the present invention includes a fixing part 11 fixed to the base 2 of the machine tool, and a protrusion protruding forward of the fixing part 11 to the circumferential part of the stopper. The stopper support part 12 to which 40 is fixed, the workpiece support part 13 which protrudes in front of the stopper support part 12, and to which the workpiece 1 can be fitted to the outside, and from the said fixing part 11 A housing (10) having a coupling hole (14) extending to the work support portion (13), and a through hole (13a) formed in the circumferential surface of the work support portion (13); A chucking tank 20 which is installed in the through-hole 13a of the housing 10 so as to be protruding from the housing 10; A drawbar 30 formed on the coupling hole 14 of the housing 10 so as to be moved forward and backward and formed on an inclined surface 31 on which the chucking tank 20 is seated; A stopper 40 is provided around the stopper support part 12 of the housing 10 to limit the position of the workpiece 1 fitted to the housing 10, thereby providing a cylindrical workpiece 1 to the housing. It is the same as that of the prior art which can be fixed to the workpiece | work support part 13 of (10).

이때, 상기 관통공(13a)은 도 5에 도시한 바와 같이, 상기 피가공물 지지부(13)의 선단부 둘레면에 방사방향으로 분산배치되고, 상기 처킹조(13a)는 상기 관통공(13a)에 끼워진 상태로 방사방향으로 슬라이드되어 출몰할 수 있도록 구성된다. 또한, 상기 홀더삽입부(15)와 처킹조(20)의 외측 둘레면에는 각각 오목홈(13b,21a)이 각각 형성되며, 오목홈(13b,21a)에 결합되는 스냅링(21)에 의해 처 킹조(20)가 빠지지 않도록 지지된다.At this time, the through hole 13a is radially disposed on the circumferential surface of the distal end of the workpiece support part 13, and the chucking tank 13a is disposed in the through hole 13a. It is configured to slide out in a radial direction while being fitted. In addition, concave grooves 13b and 21a are formed in the outer circumferential surfaces of the holder inserting portion 15 and the chucking tank 20, respectively, and are disposed by snap rings 21 coupled to the concave grooves 13b and 21a. The king jaw 20 is supported so as not to fall out.

그리고, 상기 하우징(10)에는 상기 스토퍼지지부(12)와 피가공물 지지부(13)의 사이에 위치된 홀더삽입부(15)가 더 구비된다. 상기 홀더삽입부(15)는 후술하는 홀더(60)가 전후진가능하게 지지될 수 있도록 전후방향의 외경이 동일한 통형상으로 구성된다. The housing 10 further includes a holder insert 15 positioned between the stopper support 12 and the workpiece support 13. The holder inserting portion 15 is configured in a tubular shape having the same outer diameter in the front and rear directions so that the holder 60, which will be described later, is supported to be movable forward and backward.

이때, 상기 스토퍼지지부(12)와 홀더삽입부(15)와 피가공물 지지부(13)는 일체로 구성되고, 상기 고정부(11)는 별체로 구성되어, 상기 스토퍼지지부(12)를 전후로 관통하는 볼트(17)에 의해 상호 고정결합되며, 상기 결합공(14)은 상기 고정부(11)에서부터 상기 피가공물 지지부(13)의 선단부까지 관통되도록 형성된다.In this case, the stopper support part 12, the holder inserting part 15, and the workpiece support part 13 are integrally formed, and the fixing part 11 is formed as a separate body to penetrate the stopper support part 12 back and forth. It is fixed to each other by a bolt 17, the coupling hole 14 is formed so as to penetrate from the fixing portion 11 to the front end of the workpiece support 13.

그리고, 본 발명에 따른 맨드렐 척에는, 상기 하우징(10)의 홀더삽입부(15)에 전후진 가능하게 끼움결합되는 홀더(60)와; 상기 홀더(60)에 연결되어 홀더(60)를 전방쪽으로 탄성가압하는 스프링(70)과; 상기 홀더삽입부(15)의 외주면에 구비되어 상기 홀더(60)가 홀더삽입부(15)에서 이탈되지 않도록 지지하는 걸림부(16); 가 더 구비된다.In addition, the mandrel chuck according to the present invention includes: a holder (60) which is fitted to the holder inserting portion (15) of the housing (10) so as to be movable forward and backward; A spring 70 connected to the holder 60 to elastically press the holder 60 forward; A catching portion 16 provided on an outer circumferential surface of the holder inserting portion 15 to support the holder 60 so as not to be separated from the holder inserting portion 15; Is further provided.

상기 홀더(60)는 상기 피가공물(1)의 기단부 내주면의 형상과 상응하는 형태로 구성되며, 중앙부에는 길이방향의 삽입공(61)이 형성되어 상기 하우징(10)의 홀더삽입부(15)에 전후방향으로 슬라이드가능하게 결합되는 것으로, 상기 피가공물 지지부(13)의 외부에 피가공물(1)을 끼우면, 상기 홀더(60)가 피가공물(1)의 기단 부 내주면에 끼워져 피가공물(1)을 지지하는 기능을 한다.The holder 60 is configured in a shape corresponding to the shape of the inner peripheral surface of the proximal end of the workpiece 1, the insertion hole 61 of the longitudinal direction is formed in the center portion of the holder inserting portion 15 of the housing 10 To be slidably coupled to the front and rear direction, when the workpiece (1) is fitted to the outside of the workpiece support 13, the holder 60 is fitted to the inner peripheral surface of the proximal end of the workpiece (1) ) To support.

상기 스프링(70)은 상기 스토퍼지지부(12)와 상기 홀더(60)의 사이에 위치되도록 홀더삽입부(15)의 외부에 끼워져, 상기 홀더(60)를 전방으로 탄성가압한다.The spring 70 is fitted to the outside of the holder inserting portion 15 so as to be positioned between the stopper support portion 12 and the holder 60 to elastically press the holder 60 forward.

상기 걸림부(16)로는 도 4에 도시한 바와 같이, 홀더삽입부(15)의 외주면에 결합되는 핀(16a)을 적용하였다.As the locking portion 16, as shown in FIG. 4, a pin 16a coupled to the outer circumferential surface of the holder insertion portion 15 was applied.

따라서, 도 2에 도시한 바와 같이, 상기 홀더(60)가 스프링(70)에 의해 전진되어 상기 걸림부에 밀착된 상태에서, 작업자가 상기 하우징(10)에 피가공물(1)을 끼우면, 도 3에 도시한 바와 같이, 상기 홀더(60)가 피가공물(1)의 내주면에 끼워져 후진되면서 피가공물(1)을 지지하고, 피가공물(1)이 완전히 끼워진 상태에서 상기 드로우바(30)를 후진시키면, 도 5의 (a)와 (b)에 도시한 바와 같이, 상기 드로우바(30)의 경사면(31)에 의해 상기 처킹조(20)가 외부로 돌출되어 피가공물(1)의 내주면에 밀착되어, 피가공물(1)이 움직이지 않도록 고정한다.Therefore, as shown in FIG. 2, when the holder 60 is pushed by the spring 70 to be in close contact with the engaging portion, the worker inserts the workpiece 1 into the housing 10. As shown in FIG. 3, the holder 60 is inserted into the inner circumferential surface of the workpiece 1 to support the workpiece 1 while being retracted, and the draw bar 30 is held in a state where the workpiece 1 is fully inserted. When retracted, as illustrated in FIGS. 5A and 5B, the chucking tank 20 protrudes to the outside by the inclined surface 31 of the draw bar 30, and the inner circumferential surface of the workpiece 1. It is in close contact with and fixed to prevent the workpiece (1) from moving.

이와같이 구성된 맨드렐 척은 상기 스프링(70)에 의해 지지되는 홀더(60)가 하우징(10)에 구비되어, 피가공물(1)을 하우징(10)에 끼울 때 상기 홀더(60)가 피가공물(1)에 맞물려 피가공물(1)을 탄성적으로 지지한다. 따라서, 작업자가 피가공물(1)을 끼울 때 피가공물(1)이 끼워지는 속도가 늦어지므로, 피가공물(1)이 의도하지 않게 빠르게 슬라이드되어 피가공물(1)을 끼우는 작업중에 작업자의 손이 피가공물(1)과 스토퍼(40)의 사이에 끼어 부상을 입거나, 피가공물(1)이 스토퍼(40) 나 하우징(10)에 강하게 부딪혀 손상되는 것을 방지할 수 있는 장점이 있다.The mandrel chuck configured as described above has a holder 60 supported by the spring 70 in the housing 10, and when the workpiece 1 is inserted into the housing 10, the holder 60 is disposed of the workpiece ( 1 to elastically support the workpiece (1). Therefore, when the worker inserts the workpiece 1, the speed at which the workpiece 1 is fitted is slowed down, so that the workpiece 1 slides unintentionally quickly and the worker's hand during the operation of fitting the workpiece 1. Injury between the workpiece 1 and the stopper 40 may be injured, or the workpiece 1 may be hardly hit against the stopper 40 or the housing 10 to prevent damage.

또한, 피가공물(1)을 완전히 끼워 상기 처킹조(20)로 고정하면, 상기 홀더(60)가 스프링(70)에 의해 피가공물(1)의 기단부에 강하게 밀착되어 피가공물(1)의 기단부를 지지한다. 따라서, 피가공물(1)의 선단부와 기단부가 상기 처킹조(20)와 홀더(60)에 의해 각각 지지되어, 맨드렐 척과 피가공물(1)을 함께 고속으로 회전시킬 때에도 진동이 발생되지 않으므로, 상기 드로우바(30)의 선단부에 별도의 센터를 연결하여야 하는 종래의 맨드렐 척과 달리, 별도의 센터를 연결할 필요가 없으며, 작업준비시간을 줄이고 작업효율을 향상시킬 수 있는 장점이 있다.In addition, when the workpiece 1 is fully inserted and fixed with the chucking tank 20, the holder 60 is strongly adhered to the proximal end of the workpiece 1 by the spring 70, thereby proximal the proximal end of the workpiece 1. Support. Therefore, the front end and the proximal end of the workpiece 1 are supported by the chucking tank 20 and the holder 60, respectively, so that vibration does not occur even when the mandrel chuck and the workpiece 1 are rotated together at high speed. Unlike conventional mandrel chucks that need to connect a separate center to the front end of the draw bar 30, there is no need to connect a separate center, and there is an advantage of reducing work preparation time and improving work efficiency.

본 실시예의 경우, 상기 하우징(10)이, 공작기계에 고정설치되는 고정부(11)를 별체로 구성하고, 스토퍼지지부(12)와 홀더삽입부(15) 및 피가공물지지부(13)는 일체로 구성하여, 볼트(17)를 이용하여 스토퍼지지부(12)를 고정부(11)에 고정하도록 하였으나, 필요에 따라, 도 6에 도시한 바와 같이, 상기 고정부(11)와 스토퍼지지부(12)와 홀더삽입부(15) 및 피가공물지지부(13)를 포함하는 하우징(10) 전체를 일체로 구성하는 것도 가능하다.In the present embodiment, the housing 10, the fixing portion 11 fixed to the machine tool is configured separately, the stopper support portion 12, the holder inserting portion 15 and the workpiece support portion 13 is integral Although the stopper support part 12 is fixed to the fixed part 11 using the bolt 17, as needed, as shown in FIG. 6, the said fixed part 11 and the stopper support part 12 as needed. ), The whole housing 10 including the holder insert 15 and the workpiece support 13 may be integrally formed.

또한, 상기 걸림부(16)는 상기 홀더삽입부(15)의 외주면에 핀(16a)을 결합하여 구성하였으나, 필요에 따라, 홀더삽입부(15)의 선단 둘레면에 링형상의 와셔를 결합하거나, 도 7에 도시한 바와 같이, 상기 홀더삽입부(15)와 피가공물 지지부(13)를 별체로 구성하고 상기 피가공물 지지부(13)의 기단부 외경을 크게 제작하여 걸림부(16)를 형성하는 것도 가능하다.In addition, the engaging portion 16 is configured by coupling the pin 16a to the outer circumferential surface of the holder inserting portion 15, but if necessary, the ring-shaped washer is coupled to the peripheral surface of the tip of the holder inserting portion 15 Alternatively, as shown in FIG. 7, the holder insert 15 and the workpiece support 13 are separately formed, and a proximal end outer diameter of the workpiece support 13 is manufactured to form a locking portion 16. It is also possible.

또한, 본 실시예의 경우, 상기 걸림부(16)는 상기 홀더삽입부(15)의 선단 둘레면에 구비되었으나, 상기 걸림부(16)의 위치는 필요에 따라 전후방향으로 조절될 수 있다.In addition, in the present embodiment, the locking portion 16 is provided on the front circumferential surface of the holder inserting portion 15, the position of the locking portion 16 can be adjusted in the front and rear direction as needed.

도 1은 종래의 맨드렐 척을 도시한 측단면도,1 is a side cross-sectional view showing a conventional mandrel chuck,

도 2는 본 발명에 따른 맨드렐 척을 도시한 측면도,2 is a side view showing a mandrel chuck according to the present invention;

도 3은 본 발명에 따른 맨드렐 척을 도시한 측단면도,3 is a side cross-sectional view showing a mandrel chuck in accordance with the present invention;

도 4는 본 발명에 따른 맨드렐척으로 도시한 분해도,4 is an exploded view showing a mandrel chuck in accordance with the present invention;

도 5는 본 발명에 따른 맨드렐 척의 작용을 도시한 정단면도,5 is a front sectional view showing the action of the mandrel chuck according to the present invention;

도 6 및 도 7은 본 발명에 따른 맨드렐 척의 변형예를 도시한 참고도이다.6 and 7 are reference views showing a modification of the mandrel chuck according to the present invention.

Claims (2)

공작기계에 고정되는 고정부(11)와, 고정부(11)의 전방으로 돌출되어 둘레부에 스토퍼(40)가 고정되는 스토퍼지지부(12)와, 스토퍼지지부(12)의 전방으로 돌출되어 외부에 피가공물(1)을 끼울 수 있도록 된 피가공물 지지부(13)와, 고정부(11)로부터 피가공물 지지부(13)까지 연장되는 결합공(14)과, 피가공물 지지부(13)의 둘레면에 형성된 관통공(13a)을 갖춘 하우징(10)과; 하우징(10)의 관통공(13a)에 출몰가능하게 설치되는 처킹조(20)와; 하우징(10)의 결합공(14)에 전후진가능하게 설치되며 둘레부에는 처킹조(20)가 안착되는 경사면(31) 형성된 드로우바(30)와; 하우징(10)의 스토퍼지지부(12) 둘레에 구비되어 하우징(10)에 끼워진 피가공물(1)의 위치를 제한하는 스토퍼(40)를 포함하는 맨드렐 척에 있어서,The fixing part 11 fixed to the machine tool, the stopper support part 12 which protrudes forward of the fixing part 11 and the stopper 40 is fixed to the circumference, and protrudes forward of the stopper support part 12 to the outside. The workpiece support portion 13, into which the workpiece 1 can be inserted, the coupling hole 14 extending from the fixed portion 11 to the workpiece support portion 13, and the circumferential surface of the workpiece support portion 13; A housing 10 having a through hole 13a formed therein; A chucking tank 20 which is installed in the through-hole 13a of the housing 10 so as to be protruding from the housing 10; A draw bar 30 formed on the coupling hole 14 of the housing 10 so as to be moved forward and backward, and having an inclined surface 31 on which a chucking tank 20 is seated; In the mandrel chuck which includes a stopper 40 provided around the stopper support part 12 of the housing 10 to limit the position of the workpiece 1 fitted in the housing 10, 상기 하우징(10)에는 스토퍼지지부(12)와 피가공물 지지부(13)의 사이에 위치된 홀더삽입부(15)가 더 구비되고,The housing 10 further includes a holder inserting portion 15 positioned between the stopper support portion 12 and the workpiece support portion 13. 하우징(10)의 홀더삽입부(15)에 전후진 가능하게 끼움결합되어 하우징(10)에 끼워진 피가공물(1)의 내부면을 지지하는 홀더(60)와; 홀더(60)에 연결되어 홀더(60)를 전방쪽으로 탄성가압하는 스프링(70)과; 홀더삽입부(15)의 외주면에 구비되어 홀더(60)가 홀더삽입부(15)에서 이탈되지 않도록 지지하는 걸림부(16)가 더 구비된 것을 특징으로 하는 맨드렐 척.A holder (60) which is fitted to the holder inserting portion (15) of the housing (10) in a forward and backward direction and supports the inner surface of the workpiece (1) inserted into the housing (10); A spring 70 connected to the holder 60 to elastically press the holder 60 forward; The mandrel chuck is provided on the outer circumferential surface of the holder inserting portion 15 and further includes a catching portion 16 for supporting the holder 60 so as not to be separated from the holder inserting portion 15. 제 1항에 있어서, 상기 걸림부(16)는 홀더삽입부(15)의 외주면에 결합되는 핀(16a)인 것을 특징으로 하는 맨드렐 척.The mandrel chuck according to claim 1, wherein the engaging portion (16) is a pin (16a) coupled to an outer circumferential surface of the holder insertion portion (15).
KR1020080026484A 2008-03-21 2008-03-21 Mandrel chuck KR100869138B1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101064753B1 (en) * 2011-02-15 2011-09-15 (주)와이디피 A connection device for holder of cutting tool
KR101169348B1 (en) 2011-08-12 2012-07-30 (주)와이디피 A connection device for holder of cutting tool
CN109128949A (en) * 2018-11-15 2019-01-04 斯耐翔精密机械（苏州）有限公司 Accurate novel clamp
KR101995820B1 (en) 2018-02-19 2019-07-03 (주)디와이테크 Mandrel chuck
CN110270700A (en) * 2019-07-09 2019-09-24 江苏太平洋精锻科技股份有限公司 The adjustable shaft being placed in hollow power chuck is to holding out against fixture
RU219109U1 (en) * 2023-03-30 2023-06-28 Публичное акционерное общество "КАМАЗ" Device for axial fixation of workpieces
CN116604378A (en) * 2023-06-12 2023-08-18 吉首长潭泵业有限公司 Machining device for mechanical seal shaft sleeve with blades

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KR200321790Y1 (en) 2003-04-29 2003-07-31 김홍길 collet chuck
JP2005028490A (en) 2003-07-10 2005-02-03 Aisin Ai Co Ltd Inner diameter clamping device
KR20060111486A (en) * 2003-11-05 2006-10-27 슈운크 게엠베하 운트 콤파니 카게 스판-운트 그레이프테크닉 Expansion chuck

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JPS61148542U (en) 1985-03-05 1986-09-12
US5208967A (en) 1988-10-26 1993-05-11 Wicksteed Engineering Limited Tube extraction apparatus
KR20020091113A (en) * 2001-01-03 2002-12-05 슈바이게르, 베른트 Interchangeable holder for hollow drills
KR200321790Y1 (en) 2003-04-29 2003-07-31 김홍길 collet chuck
JP2005028490A (en) 2003-07-10 2005-02-03 Aisin Ai Co Ltd Inner diameter clamping device
KR20060111486A (en) * 2003-11-05 2006-10-27 슈운크 게엠베하 운트 콤파니 카게 스판-운트 그레이프테크닉 Expansion chuck

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101064753B1 (en) * 2011-02-15 2011-09-15 (주)와이디피 A connection device for holder of cutting tool
KR101169348B1 (en) 2011-08-12 2012-07-30 (주)와이디피 A connection device for holder of cutting tool
KR101995820B1 (en) 2018-02-19 2019-07-03 (주)디와이테크 Mandrel chuck
CN109128949A (en) * 2018-11-15 2019-01-04 斯耐翔精密机械（苏州）有限公司 Accurate novel clamp
CN110270700A (en) * 2019-07-09 2019-09-24 江苏太平洋精锻科技股份有限公司 The adjustable shaft being placed in hollow power chuck is to holding out against fixture
RU219109U1 (en) * 2023-03-30 2023-06-28 Публичное акционерное общество "КАМАЗ" Device for axial fixation of workpieces
CN116604378A (en) * 2023-06-12 2023-08-18 吉首长潭泵业有限公司 Machining device for mechanical seal shaft sleeve with blades

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