WO2018186690A1 - Holder for cutting-tool fastening - Google Patents

Holder for cutting-tool fastening Download PDF

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Publication number
WO2018186690A1
WO2018186690A1 PCT/KR2018/004003 KR2018004003W WO2018186690A1 WO 2018186690 A1 WO2018186690 A1 WO 2018186690A1 KR 2018004003 W KR2018004003 W KR 2018004003W WO 2018186690 A1 WO2018186690 A1 WO 2018186690A1
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WO
WIPO (PCT)
Prior art keywords
adapter
hole
holder
slider
screw
Prior art date
Application number
PCT/KR2018/004003
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French (fr)
Korean (ko)
Inventor
서재원
Original Assignee
주식회사 삼천리기계
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Application filed by 주식회사 삼천리기계 filed Critical 주식회사 삼천리기계
Publication of WO2018186690A1 publication Critical patent/WO2018186690A1/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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/26—Securing milling cutters to the driving spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter

Definitions

  • the present invention is for fastening a cutting tool for fastening a cutting tool such as a drill or an end mill, a side milling cutter to a head of a machine tool when reamering or milling a machining center or the like.
  • a cutting tool such as a drill or an end mill, a side milling cutter to a head of a machine tool when reamering or milling a machining center or the like.
  • the holder more specifically, it is possible to install the drive screw gear and the spindle inside the single-shaped holder without dividing the holder body, so that the drive screw gear and spindle can be replaced if necessary.
  • the present invention relates to a holder for fastening a cutting tool such that the verticality does not change.
  • a milling chuck is applied to a machine tool such as a machining center or a milling machine to serve as a kind of adapter for mounting a cutting tool.
  • FIG. 1 is a longitudinal cross-sectional view of a conventional cutting tool fastening holder and Figure 2 is a cross-sectional view taken along the line A-A of Figure 1, the conventional cutting tool fastening holder 10, the tool 11 held in the holder is machined It is for attaching detachably to the head part 9 of a machine,
  • the member 17, the pull stud 18, etc. are comprised.
  • the holder body 12 has a tapered shank portion 121, a flange portion 122 formed at one end of the shank portion 121, and a shank portion 121 of the flange portion 122 as shown in FIG.
  • the adapter coupling part 123 is continuously connected to the lower part of the adapter coupling part 123, and the first cylindrical hole 123a for coupling the adapter 13 and the bevel gear 16 are rotatable.
  • the second cylindrical hole 123b is installed concentrically.
  • a through hole 12a extending from the rear end of the shank portion 121 to the second cylindrical hole 123b is formed in the shaft center of the holder main body 12, and the full stud 18 is formed on the inner circumferential surface of the through hole 12a.
  • the female threaded portion 12b to which the screw) is screwed is formed over a predetermined section.
  • the adapter 13 accommodates the tapered collet 14 as shown in FIGS. 1 and 2, and has a length corresponding to the length of the tapered collet 14.
  • a collet holding hole 131 through which the tapered collet 14 is inserted is formed in the shaft center of the adapter 13, and the collet holding hole 131 is formed to correspond to the outer shape of the tapered collet 14.
  • a tapered portion 131a, an evacuation portion 131b, and a straight portion 131c are sequentially formed from the front end of the adapter 13 to the rear end direction.
  • the adapter 13 has, at one end, a locking jaw portion 132 having a diameter corresponding to the adapter coupling portion 123 is formed, and a plurality of bolts 19 are arranged along the entire cross section of the adapter coupling portion 123. Is fixed to match, and the upper portion of the adapter 13 is formed with a cylindrical portion 133 assembled in the first cylindrical hole 123a of the adapter coupling portion 123.
  • the tapered collet 14 is detachably inserted into the collet holding hole 131 of the adapter 13 while holding the tool 11, and the shank portion 11a of the tool 11 as shown in FIG. 1.
  • the shank insertion hole 141 into which is inserted is formed at the center of the shaft portion and configured to be capable of shaft reduction, and the tapered portion 14a engaged with the tapered portion 131a and the straight portion 131c of the collet holding hole 131.
  • a straight portion 14b, and a male screw portion 142 is screwed to the female screw portion 162 of the bevel gear 16 on the upper outer peripheral surface of the straight portion 14b.
  • the driving bevel pinion 15 is for holding the tool 11 or releasing the holding state by moving the tapered collet 14 in the axial direction of the adapter 13 as shown in FIGS. 1 and 2.
  • the driving bevel pinion 15 is rotatably mounted in the insertion hole 20 formed to penetrate through the outer circumferential surface of the flange portion 122 formed in the holder main body 12.
  • the bevel gear 16 converts the rotational movement of the driving bevel pinion 15 into a linear motion in the axial direction of the tapered collet 14, and the bevel gear 16 is mutually different from the driving bevel pinion 15. It is rotatably attached to the 2nd cylindrical hole 123b of the adapter 13 so that it may be engaged.
  • the outer peripheral surface of the cylindrical boss portion 161 formed on the bevel gear 16 is provided with a sealing member 21 to be connected to the cylindrical portion 133 of the adapter 13, the tapered collet on the inner peripheral surface of the boss portion 161
  • a female threaded portion 162 is screwed into the male threaded portion 142 of (14).
  • a through hole 163 is formed in the shaft portion of the bevel gear 16 to communicate with the boss portion 161, and a locking jaw portion 164 is formed on the inner circumferential surface of the through hole 163.
  • a position limiting jaw 165 for suppressing a phenomenon in which the bevel gear 16 moves in the axial direction is formed at a portion connected to the boss 161 formed in the bevel gear 16.
  • 165 is comprised so that it may be clamped by the edge part 123c formed between the tip surface of the cylindrical part 133, and the 1st cylindrical hole 123a which opposes it, and the 2nd cylindrical hole 123b.
  • the cutting fluid distribution member 17 guides the cutting fluid supplied from the rear end of the holder main body 12 through the inside of the holder main body 12 to the tapered collet 14 side, and at the same time the driving bevel pinion 15 and
  • the sealing member 22 is installed in the through hole 163 so as to be prevented from leaking to the bevel gear 16 side, so as to be pressed by the locking jaw portion 164 and the cutting fluid flow member 17 of the bevel gear 16.
  • Another sealing member 23 is provided between the first cylindrical portion 171 and the second cylindrical portion 172 so that cutting fluid does not flow out to the driving bevel pinion 15 and the bevel gear 16 side. It is comprised so that it may be connected to the through-hole 12a of the holder main body 12. As shown in FIG.
  • the pull stud 18 is for attaching the shank portion 121 of the holder body 12 to the taper hole 9A of the head portion 9, and is screwed to the female threaded portion 12b of the holder body 12.
  • the cutting fluid is composed of a shaft portion 183 formed at the rear end of the shaft and a flange-shaped engagement portion 184 provided at the rear end of the shaft portion 183 and a cutting liquid is supplied in the vertical direction to the center of the full stud 18.
  • the supply passage 185 is formed.
  • the shank portion 11a of the tool 11 must be pushed into the shank insertion hole 141 of the tapered collet 14, in which case the tapered collet 14 ),
  • the shank insertion hole 141 of the tapered collet 14 cut out in the vertical direction and cut out in the vertical direction (about 3-4 pieces) is extended by its elastic force.
  • the driving bevel pinion 15 meshes with the bevel gear 16 to rotate the bevel gear 16.
  • the boss portion 161 of the bevel gear 16 is rotated.
  • the female threaded portion 162 formed in the) is screwed to the male threaded portion 142 of the tapered collet 14 so that the tapered collet 14 moves inside the collet holding hole 131 of the adapter 13.
  • the tapered portion 14a of the tapered collet 14 is compressed by the tapered portion 131a formed inside the adapter 13, thereby tightening the shank 11a of the tool 11. ), The holding of the tool 11 is completed.
  • Patent Document 0001 Japanese Patent Publication No. 03285809 (Announced on May 27, 2002)
  • Patent Document 0002 Japanese Patent Publication No. 04157420 (August 1, 2008)
  • the conventional cutting tool fastening holder has a number of problems as follows.
  • the holder 10 is divided into a holder body 12 and an adapter 13 in order to install the driving bevel pinion 15, the bevel gear 16, and the cutting fluid flow member 17 in the holder. It is comprised so that these may be integrated with the bolt 19, and productivity increased because of the increase of the number of parts.
  • the adapter 13 is assembled, there is a limit in matching the perpendicularity of the holder body 12 and the center of the adapter 13, and there is a fatal defect that degrades the processing accuracy of the workpiece.
  • the present invention has been made to solve such a problem in the prior art, it is possible to install the drive screw gear and the spindle in the interior of the single-shaped holder without dividing the holder body, so that the drive screw gear and spindle as needed
  • the purpose is to ensure that the verticality of the center of the holder does not change even if it is replaced.
  • a tapered shank portion is formed at the upper portion, and an adapter having a tapered portion corresponding to the tapered portion of the collet is formed at the lower portion thereof, and the mounting hole is vertically connected to the tapered portion at the same time.
  • the first male thread part is built in the mounting hole formed in the center of the holder body and screwed into the shank part at one end thereof, and at the other end, a second male thread part opposite to the first male thread part is formed at the other end.
  • a spindle having a driven screw gear integrally formed between two male threads It is installed through the insertion hole formed in the flange portion is engaged with the driven screw gear of the spindle, and screwed into the insertion hole formed in the holder body to close the insertion portion of the drive screw gear, the center of the tool insertion hole is formed
  • a first female threaded portion inserted through a lower portion of the adapter and screwed to a second male threaded portion of the spindle, the slider being formed to penetrate a long vertical hole, and an anti-rotation member formed on the adapter of the holder body; It is installed to pass through the long hole of the slider through the ball to suppress the rotation of the slider to prevent the slider to move up and down so that the collet is inserted through the collet holding hole of the adapter is screwed to the slider
  • a holder for fastening a cutting tool is provided.
  • the present invention has the following advantages over the holder for fastening cutting tools.
  • the holder body is formed in one piece, even if the component is replaced, the vertical degree is prevented in advance, so that the precision of the holder body can be constantly maintained.
  • the holder body is made in one piece, it is possible to omit a separate polishing process, thereby improving productivity.
  • FIG. 1 is a longitudinal cross-sectional view of a conventional cutting tool fastening holder
  • FIG. 2 is a cross-sectional view taken along the line A-A of FIG.
  • FIG. 3 is a perspective view showing one embodiment of the present invention
  • FIG. 4 is a perspective view showing a partial cross section of an embodiment of the present invention.
  • FIG. 5 is an exploded perspective view showing the main part of the present invention.
  • FIG. 6 is an assembled perspective view of FIG.
  • FIG. 7 is a plan view showing a state in which the drive screw gear is engaged with the driven screw gear of the spindle in the present invention.
  • FIG. 8A and 8B are longitudinal cross-sectional views of FIG. 3 for explaining the operating state of the present invention.
  • Figure 4 is a perspective view showing a part of the embodiment of the present invention and Figure 5 is an exploded perspective view showing the main part of the present invention
  • Figures 8a and 8b is a longitudinal cross-sectional view of Figure 3 for explaining the operating state of the present invention
  • the present invention is an integrated holder main body 30, the spindle 40 is installed in the holder main body to rotate in rotation, the drive screw gear 50 for rotating the spindle 40, the drive screw gear 50 in the holder main body 30 Is fixed to the cap 60, the slider 70 is fixed to the spindle 40 to prevent the deviation from being separated, the slider 70 to prevent the rotation of the slider, the rotation preventing member 80 to prevent the rotation of the slider, the slider 70 And a collet 90 holding the same).
  • the holder body 30 has a tapered shank portion 31 formed at the upper portion thereof, and an adapter 32 having a tapered portion 32a corresponding to the tapered portion 91 of the collet 90 is formed at the lower portion thereof.
  • an adapter 32 having a tapered portion 32a corresponding to the tapered portion 91 of the collet 90 is formed at the lower portion thereof.
  • a flange portion 33 which abuts on the bottom surface of the head portion 9 is formed.
  • a mounting hole 34 is vertically formed at the center of the holder main body 30 so as to be connected to the tapered portion 32a formed in the adapter 32.
  • a third female thread portion 31a is formed at an upper portion of the mounting hole 34 located in the shank portion 31.
  • the spindle 40 is embedded through the mounting hole 34 formed in the center of the holder body 30, and is screwed to the third female thread portion 31a formed in the shank portion 31 at one end as shown in FIG.
  • a first male thread portion 41 is formed, and at the other end, a second male thread portion 42 having a thread opposite to the first male thread portion 41 is formed, and the first and second male thread portions 41 and 42 are formed.
  • the driven screw gear 43 is integrally formed between them.
  • the first male thread portion 41 is used as the right screw, and the second male thread portion 42 is applied as the left screw.
  • the driving screw gear 50 rotates the spindle 40 by engaging the driven screw gear 43 of the spindle 40 as shown in FIGS. 5 and 7, and the flange portion 33 formed on the holder body 30. It is installed through the insertion hole 35 of the engaged with the driven screw gear 43 of the spindle 40, the tool insertion groove 51 is formed on one surface.
  • the cap 60 is to close the inlet of the insertion hole 35 so that the driving screw gear 50 installed through the insertion hole 35 is not separated, and the cap 60 is screwed into the insertion hole 35 formed in the holder body 30.
  • a tool insertion hole 61 is formed at the center to insert a wrench (not shown) into the tool insertion groove 51 formed in the driving screw gear 50, as shown in FIG.
  • the insertion hole 35 formed to penetrate the flange portion 33 of the holder body 30 has a large diameter portion 36 and a small diameter having a second female thread portion 36a as shown in FIG. 4. Is formed of a neck portion 37, one side of the drive screw gear 50 is formed with a protrusion 52 is assembled to the small diameter portion 37, the drive screw gear 50 through the large diameter portion (36) Is assembled, the protrusion 52 is fitted to the small diameter portion 37 and the inlet of the large diameter portion 36 is closed by the cap 60 which is screwed to the second female screw portion 36a.
  • the holder main body 30 may be inserted to have a 180 ° phase difference in the holder main body 30 as shown in FIG. 9 to facilitate attachment and detachment of a tool (not shown).
  • Forming a hole (35) to install a drive screw gear 50 for engaging the driven screw gear 43 in each of the insertion hole 35 and the inlet of the insertion hole 35 is configured to close with a cap 60 It is understandable.
  • the slider 70 transfers the rotational movement of the spindle 40 to the collet 90 by transferring the rotational movement of the spindle 40 to the collet 90.
  • the first female threaded portion 71 is screwed to the second male threaded portion 42 of the spindle 40.
  • the anti-rotation member 80 is to increase and decrease the rotation of the slider 70, the long hole 72 of the slider 70 through the anti-rotation member fastening hole 38 formed in the adapter 32 It is installed to pass through the other end is inserted into the insertion groove (38a) formed in the adapter 32, the rotation preventing member 80 is fixed by screwing the adapter 32 as shown in FIG.
  • the collet 90 is to hold the tool or release the holding state.
  • the collet 90 is inserted through the collet holding hole 39 of the adapter 32 to be screwed to the slider 70. Since the collet 90 is the same as the conventional collet, its structure Detailed description thereof will be omitted.
  • the taper portion 91 of the collet 90 is connected to the adapter 32. Since the shank insertion hole 93 of the collet 90 having a plurality of incisions 92 is spaced apart from the taper portion 32a of the (), the tool can be replaced since it is in the state of maximum expansion by its own elastic force.
  • the second male thread portion 42 screwed to the slider 70 is formed of a left screw opposite to the first male thread portion 41. Since the slider 70 is released from the second male threaded portion 42, the slider 70 is lowered together with the collet 90 without being rotated by the rotation preventing member 80.
  • the wrench is inserted through the tool insertion hole 61 of the cap 60, which is closing the inlet of the insertion hole 35 formed in the flange portion 33, and the tool insertion groove 51 formed in the drive screw gear 50. 8B, the driven screw gear 43 is engaged with the driving screw gear 50 so that the spindle 40 co-rotates.
  • the second male thread portion 42 of the left hand thread opposite to the first male thread portion 41 is screwed to the first female thread portion 71 formed on the slider 70. Since the first female threaded portion 71 is locked to the second male threaded portion 42, the slider 70 also rises together with the spindle 40.
  • the anti-rotation member 80 is fitted to the long hole 72 formed in the slider 70 so that the slider 70 does not rotate but rises along the mounting hole 34.
  • the slider 70 and the collet 90 fixed are also raised together, and accordingly, the taper portion 91 formed below the outer circumferential surface of the collet 90 is raised. Is pressed by the tapered portion 32a formed on the inner surface of the adapter 32, so that the collet 90 holds the shank portion of the tool as shown in FIG. 8B.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

The present invention relates to a holder for cutting-tool fastening which allows a cutting tool, such as a drill or an end mill, or a side milling cutter, to be fastened to the head part of a machine tool at the time of reaming or milling on a machining center or the like, and allows a driving screw gear and a spindle to be installed inside a holder having a single form, rather than dividing a holder body, so that verticality which is the center of the holder remains unchanged even if the driving screw gear and spindle are replaced as necessary. To this end, the present invention comprises: an integrated holder body (30) which has a tapering shank part (31) formed at the top thereof and an adapter (32) formed at the bottom thereof, the adapter (32) having a tapering part (32a) corresponding to the tapering part (91) of a collet (90), and also has a mounting hole (34) formed vertically so as to connect to the tapering part (32a), a flange part (33) which is in contact with the lower surface of a head part (9) and formed at the boundary between the shank part (31) and the adapter (32), an insertion hole (35) communicating with the mounting hole (34) and being orthogonally formed in the flange part (33), and a rotation-preventing-member fastening hole (38) formed in the adapter (32); a spindle (40) which is embedded via the mounting hole (34) formed in the center of the holder body (30) and has a first male screw part (41) formed at one end thereof and screw-coupled to the inside of the shank part (31), a second male screw part (42) which is formed at the other end thereof and has a screw thread opposite to that of the first male screw part (41), and a driven screw gear (43) integrally formed between the first and second male screw parts (41, 42); a driving screw gear (50) which is installed via the insertion hole (35) of the flange part (33) formed on the holder body (30) and is engaged with the driven screw gear (43) of the spindle (40); a cap (60) which is screw-coupled to the insertion hole (35) formed in the holder body (30), closes the insertion area of the driving screw gear (50), and has a tool insertion hole (61) formed at the center thereof; a slider (70) having a first female screw part (71), which is inserted via the lower part of the adapter (32) and screw-coupled to the second male screw part (42) of the spindle (40), and a long hole (72), which is vertically long and penetratingly formed; and a rotation-preventing member (80) which is installed so as to pass through the long hole (72) of the slider (70) via the rotation-preventing-member fastening hole (38) formed in the adapter (32) of the holder body (30) and restrains the rotation of the slider (70) so as for the slider (70) to ascend and descend, wherein the collet (90) is inserted via the collet storage/maintenance hole (39) of the adapter (32) and screw-coupled to the slider (70).

Description

절삭공구 체결용 홀더Holder for cutting tool
본 발명은 머시닝센터 등에서 리이머(reamer) 가공이나 밀링(milling) 가공을 할 때, 드릴 또는 엔드 밀, 사이드 밀링커터와 같은 절삭공구를 공작기계의 헤드부에 체결할 수 있도록 하는 절삭공구 체결용 홀더에 관한 것으로써, 좀 더 구체적으로는 홀더 본체를 분할하지 않고 단일형상으로 된 홀더의 내부에 구동 나사기어 및 스핀들을 설치할 수 있도록 하여 필요에 따라 구동 나사기어 및 스핀들을 교체하더라도 홀더의 중심인 수직도가 변하지 않도록 하는 절삭공구 체결용 홀더에 관한 것이다.The present invention is for fastening a cutting tool for fastening a cutting tool such as a drill or an end mill, a side milling cutter to a head of a machine tool when reamering or milling a machining center or the like. As for the holder, more specifically, it is possible to install the drive screw gear and the spindle inside the single-shaped holder without dividing the holder body, so that the drive screw gear and spindle can be replaced if necessary. The present invention relates to a holder for fastening a cutting tool such that the verticality does not change.
일반적으로, 밀링 척(milling chuck)은 머시닝센터나 밀링머신 등의 공작기계에 적용되어 절삭공구 장착에 필요한 일종의 어댑터역할을 하게 된다.In general, a milling chuck is applied to a machine tool such as a machining center or a milling machine to serve as a kind of adapter for mounting a cutting tool.
도 1은 종래의 절삭공구체결용 홀더의 종단면도이고 도 2는 도 1의 A - A선 단면도로써, 종래의 절삭공구체결용 홀더(10)는, 상기 홀더에 홀딩된 공구(11)를 공작기계의 헤드부(9)에 착탈 가능하게 장착하기 위한 것으로, 홀더 본체(12), 어댑터(13), 테이퍼 콜렛(14), 구동용 베벨 피니언(15), 베벨 기어(16), 절삭액 유통부재(17), 풀 스터드(18) 등을 포함한 구성으로 되어 있다.1 is a longitudinal cross-sectional view of a conventional cutting tool fastening holder and Figure 2 is a cross-sectional view taken along the line A-A of Figure 1, the conventional cutting tool fastening holder 10, the tool 11 held in the holder is machined It is for attaching detachably to the head part 9 of a machine, The holder main body 12, the adapter 13, the taper collet 14, the driving bevel pinion 15, the bevel gear 16, cutting fluid distribution The member 17, the pull stud 18, etc. are comprised.
상기 홀더 본체(12)는 도 1에서와 같이 테이퍼진 섕크부(121)와, 상기 섕크부(121)의 일단에 형성된 플랜지부(122)와, 상기 플랜지부(122)의 섕크부(121)에 연이어 어댑터 결합부(123)를 구비하고 있고 상기 어댑터 결합부(123)의 하부에는, 상기 어댑터(13)를 결합하기 위한 제1 원통구멍(123a)과, 상기 베벨 기어(16)가 회전 가능하게 설치되는 제2 원통구멍(123b)이 동심을 이루고 형성되어 있다.The holder body 12 has a tapered shank portion 121, a flange portion 122 formed at one end of the shank portion 121, and a shank portion 121 of the flange portion 122 as shown in FIG. The adapter coupling part 123 is continuously connected to the lower part of the adapter coupling part 123, and the first cylindrical hole 123a for coupling the adapter 13 and the bevel gear 16 are rotatable. The second cylindrical hole 123b is installed concentrically.
상기 홀더 본체(12)의 축심부에 섕크부(121)의 후단으로부터 제2 원통구멍(123b)에 이르는 관통 구멍(12a)이 형성되어 있고 상기 관통 구멍(12a)의 내주면에는 상기 풀 스터드(18) 등이 나사 결합되는 암 나사부(12b)가 소정의 구간에 걸쳐 형성되어 있다.A through hole 12a extending from the rear end of the shank portion 121 to the second cylindrical hole 123b is formed in the shaft center of the holder main body 12, and the full stud 18 is formed on the inner circumferential surface of the through hole 12a. The female threaded portion 12b to which the screw) is screwed is formed over a predetermined section.
상기 어댑터(13)는 도 1 및 도 2와 같이 상기 테이퍼 콜렛(14)을 수용하는 것으로, 테이퍼 콜렛(14)의 길이에 대응한 길이를 갖는다.The adapter 13 accommodates the tapered collet 14 as shown in FIGS. 1 and 2, and has a length corresponding to the length of the tapered collet 14.
상기 어댑터(13)의 축심부에 테이퍼 콜렛(14)이 삽입되는 콜렛 보관 유지공(131)이 형성되고 있는데, 상기 콜렛 보관 유지공(131)은 테이퍼 콜렛(14)의 외형에 대응되게 형성되어 어댑터(13)의 전단에서부터 후단방향으로 테이퍼부(131a), 피난부(131b) 그리고 스트레이트부(131c)가 차례로 형성되어 있다.A collet holding hole 131 through which the tapered collet 14 is inserted is formed in the shaft center of the adapter 13, and the collet holding hole 131 is formed to correspond to the outer shape of the tapered collet 14. A tapered portion 131a, an evacuation portion 131b, and a straight portion 131c are sequentially formed from the front end of the adapter 13 to the rear end direction.
또한, 상기 어댑터(13)는, 일단에 어댑터 결합부(123)에 대응하는 지름의 걸림턱부(132)가 형성되어 있어 복수의 볼트(19)에 의해 어댑터 결합부(123)의 전 단면에 축선이 일치되게 고정되고, 상기 어댑터(13)의 상부에는 어댑터 결합부(123)의 제1 원통구멍(123a)에 조립되는 원통부(133)가 형성되어 있다.In addition, the adapter 13 has, at one end, a locking jaw portion 132 having a diameter corresponding to the adapter coupling portion 123 is formed, and a plurality of bolts 19 are arranged along the entire cross section of the adapter coupling portion 123. Is fixed to match, and the upper portion of the adapter 13 is formed with a cylindrical portion 133 assembled in the first cylindrical hole 123a of the adapter coupling portion 123.
상기 테이퍼 콜렛(14)은, 공구(11)를 홀딩함과 동시에 어댑터(13)의 콜렛 보관 유지공(131)에 착탈 가능하게 삽입되는 것으로, 도 1과 같이 공구(11)의 섕크부(11a)가 삽입되는 섕크 삽입공(141)이 축심부에 형성됨과 동시에 축경 가능하게 구성되어 있고, 콜렛 보관 유지공(131)의 테이퍼부(131a) 및 스트레이트부(131c)에 계합되는 테이퍼부(14a) 및 스트레이트부(14b)가 형성되어 있으며 상기 스트레이트부(14b)의 상부 외주면에는 베벨기어(16)의 암나사부(162)에 나사 결합되는 숫 나사부(142)가 형성되어 있다.The tapered collet 14 is detachably inserted into the collet holding hole 131 of the adapter 13 while holding the tool 11, and the shank portion 11a of the tool 11 as shown in FIG. 1. The shank insertion hole 141 into which is inserted is formed at the center of the shaft portion and configured to be capable of shaft reduction, and the tapered portion 14a engaged with the tapered portion 131a and the straight portion 131c of the collet holding hole 131. ) And a straight portion 14b, and a male screw portion 142 is screwed to the female screw portion 162 of the bevel gear 16 on the upper outer peripheral surface of the straight portion 14b.
상기 구동용 베벨 피니언(15)은, 도 1 및 도 2와 같이 테이퍼 콜렛(14)을 어댑터(13)의 축 방향으로 이동시켜 공구(11)를 홀딩하거나, 홀딩상태를 해제하기 위한 것으로, 상기 구동용 베벨 피니언(15)은 홀더 본체(12)에 형성된 플랜지부(122)의 외주면으로부터 관통되게 형성된 삽입공(20)에 회전 가능하게 장착되어 있다.The driving bevel pinion 15 is for holding the tool 11 or releasing the holding state by moving the tapered collet 14 in the axial direction of the adapter 13 as shown in FIGS. 1 and 2. The driving bevel pinion 15 is rotatably mounted in the insertion hole 20 formed to penetrate through the outer circumferential surface of the flange portion 122 formed in the holder main body 12.
상기 베벨 기어(16)는 구동용 베벨 피니언(15)의 회전운동을 테이퍼 콜렛(14)의 축 방향의 직선 운동으로 변환하는 것으로, 상기 베벨 기어(16)는 구동용 베벨 피니언(15)과 서로 맞물리게 설치되도록 어댑터(13)의 제2 원통구멍(123b)에 회전 가능하게 장착되어 있다.The bevel gear 16 converts the rotational movement of the driving bevel pinion 15 into a linear motion in the axial direction of the tapered collet 14, and the bevel gear 16 is mutually different from the driving bevel pinion 15. It is rotatably attached to the 2nd cylindrical hole 123b of the adapter 13 so that it may be engaged.
상기 베벨 기어(16)에 형성된 원통형 보스부(161)의 외주면에는 어댑터(13)의 원통부(133)와 접속되게 씰링부재(21)가 설치되어 있고 상기 보스부(161)의 내주면에는 테이퍼 콜렛(14)의 숫 나사부(142)와 나사 결합되는 암 나사부(162)가 형성되어 있다.The outer peripheral surface of the cylindrical boss portion 161 formed on the bevel gear 16 is provided with a sealing member 21 to be connected to the cylindrical portion 133 of the adapter 13, the tapered collet on the inner peripheral surface of the boss portion 161 A female threaded portion 162 is screwed into the male threaded portion 142 of (14).
상기 베벨 기어(16)의 축심부에는 보스부(161)와 연통하는 관통 구멍(163)이 형성되어 있고 상기 관통 구멍(163)의 내주면에는 걸림턱부(164)가 형성되어 있다.A through hole 163 is formed in the shaft portion of the bevel gear 16 to communicate with the boss portion 161, and a locking jaw portion 164 is formed on the inner circumferential surface of the through hole 163.
상기 베벨 기어(16)에 형성된 보스부(161)와 연접된 부위에 베벨 기어(16)가 축 방향으로 이동하는 현상을 억제하는 위치 규제용 걸림턱(165)이 형성되어 있는데, 상기 걸림턱(165)은 원통부(133)의 첨단면과 이것에 대향하는 제1 원통구멍(123a)으로 제2 원통구멍(123b) 간에 형성된 단부(123c)에 의해 협지되도록 구성되어 있다.A position limiting jaw 165 for suppressing a phenomenon in which the bevel gear 16 moves in the axial direction is formed at a portion connected to the boss 161 formed in the bevel gear 16. 165 is comprised so that it may be clamped by the edge part 123c formed between the tip surface of the cylindrical part 133, and the 1st cylindrical hole 123a which opposes it, and the 2nd cylindrical hole 123b.
상기 절삭액 유통부재(17)는, 홀더 본체(12)의 후단으로부터 홀더 본체(12)의 내부를 통해 공급되는 절삭액을 테이퍼 콜렛(14) 측에 유도함과 동시에 구동용 베벨 피니언(15) 및 베벨 기어(16) 측으로 유출되는 현상을 방지하기 위한 것으로, 베벨 기어(16)의 걸림턱부(164) 및 절삭액 유동부재(17)에 눌리도록 씰링부재(22)가 관통 구멍(163)에 설치되어 있고 구동용 베벨 피니언(15) 및 베벨 기어(16) 측으로 절삭액이 유출되지 않도록 제1 원통부(171)와 제2 원통부(172)의 사이에 또 다른 씰링부재(23)가 설치되어 홀더 본체(12)의 관통 구멍(12a)에 접속되도록 구성되어 있다.The cutting fluid distribution member 17 guides the cutting fluid supplied from the rear end of the holder main body 12 through the inside of the holder main body 12 to the tapered collet 14 side, and at the same time the driving bevel pinion 15 and The sealing member 22 is installed in the through hole 163 so as to be prevented from leaking to the bevel gear 16 side, so as to be pressed by the locking jaw portion 164 and the cutting fluid flow member 17 of the bevel gear 16. Another sealing member 23 is provided between the first cylindrical portion 171 and the second cylindrical portion 172 so that cutting fluid does not flow out to the driving bevel pinion 15 and the bevel gear 16 side. It is comprised so that it may be connected to the through-hole 12a of the holder main body 12. As shown in FIG.
상기 풀 스터드(18)는, 홀더 본체(12)의 섕크부(121)를 헤드부(9)의 테이퍼구멍(9A)에 장착하기 위한 것으로, 홀더 본체(12)의 암 나사부(12b)에 나사 결합되는 숫 나사부(181)와, 상기 숫 나사부(181)의 후단에 섕크부(121)의 후단 지름보다 큰 지름의 걸림턱부(182)와, 상기 걸림턱부(182)의 숫 나사부(181) 측의 후단에 형성된 축부(183)와, 상기 축부(183)의 후단에 마련한 플랜지 형태의 계합부(184)로 구성되어 있고 상기 풀 스터드(18)의 중심에는 수직방향으로 절삭액이 공급되는 절삭액 공급통로(185)가 형성되어 있다.The pull stud 18 is for attaching the shank portion 121 of the holder body 12 to the taper hole 9A of the head portion 9, and is screwed to the female threaded portion 12b of the holder body 12. A male screw portion 181 to be coupled, a locking jaw portion 182 having a diameter larger than the rear end diameter of the shank portion 121 at a rear end of the male screw portion 181, and a male screw portion 181 side of the locking jaw portion 182. The cutting fluid is composed of a shaft portion 183 formed at the rear end of the shaft and a flange-shaped engagement portion 184 provided at the rear end of the shaft portion 183 and a cutting liquid is supplied in the vertical direction to the center of the full stud 18. The supply passage 185 is formed.
따라서 홀더(10)에 공구(11)를 홀딩하고자 할 경우에는 공구(11)의 섕크부(11a)를 테이퍼 콜렛(14)의 섕크 삽입공(141)으로 밀어 넣어야 되는데, 이때에는 테이퍼 콜렛(14)이 어댑터(13)로부터 하방으로 인출되어 수직방향으로 복수 개(대략 3-4개 정도) 절개된 테이퍼 콜렛(14)의 섕크 삽입공(141)이 자체 탄성력에 의해 확장된 상태이다.Therefore, to hold the tool 11 in the holder 10, the shank portion 11a of the tool 11 must be pushed into the shank insertion hole 141 of the tapered collet 14, in which case the tapered collet 14 ), The shank insertion hole 141 of the tapered collet 14 cut out in the vertical direction and cut out in the vertical direction (about 3-4 pieces) is extended by its elastic force.
이러한 상태에서 상기 공구(11)의 섕크부(11a)를 테이퍼 콜렛(14)의 섕크 삽입공(141)으로 최대한 밀어 넣은 다음 구동용 베벨 피니언(15)을 테이퍼 콜렛(14)이 상승되는 방향으로 회전시킨다. In this state, the shank portion 11a of the tool 11 is pushed as far as the shank insertion hole 141 of the tapered collet 14, and then the driving bevel pinion 15 is pushed in the direction in which the tapered collet 14 is raised. Rotate
이와 같이 구동용 베벨 피니언(15)을 회전시키면 상기 구동용 베벨 피니언(15)이 베벨기어(16)와 맞물려 있어 베벨 기어(16)를 회전시키게 되는데, 상기 베벨 기어(16)의 보스부(161)에 형성된 암 나사부(162)가 테이퍼 콜렛(14)의 숫 나사부(142)에 나사 결합되어 있어 테이퍼 콜렛(14)이 어댑터(13)의 콜렛 보관 유지공(131)의 내부로 이동하게 된다.As such, when the driving bevel pinion 15 is rotated, the driving bevel pinion 15 meshes with the bevel gear 16 to rotate the bevel gear 16. The boss portion 161 of the bevel gear 16 is rotated. The female threaded portion 162 formed in the) is screwed to the male threaded portion 142 of the tapered collet 14 so that the tapered collet 14 moves inside the collet holding hole 131 of the adapter 13.
이에 따라, 상기 테이퍼 콜렛(14)의 테이퍼부(14a)가 어댑터(13)의 내부에 형성된 테이퍼부(131a)에 의해 압축되면서 공구(11)의 생크(11a)를 조여주게 되므로 홀더 본체(12)에 공구(11)의 홀딩이 완료된다.Accordingly, the tapered portion 14a of the tapered collet 14 is compressed by the tapered portion 131a formed inside the adapter 13, thereby tightening the shank 11a of the tool 11. ), The holding of the tool 11 is completed.
한편, 공구(11)를 테이퍼 콜렛(14)에 홀딩하여 가공을 하다가 필요에 따라 공구를 교체하기 위해 테이퍼 콜렛(14)에서 공구(11)의 홀딩상태를 해제하고자 할 경우에는 전술한 바와는 반대방향으로 구동용 베벨 피니언(15)을 회전시키게 된다.On the other hand, while holding the tool 11 to the tapered collet 14 and processing, if you want to release the holding state of the tool 11 in the tapered collet 14 to replace the tool as necessary, the reverse The driving bevel pinion 15 is rotated in the direction.
상기 구동용 베벨 피니언(15)을 전술한 바와는 반대방향으로 회전시키면 상기 구동용 베벨 피니언(15)과 맞물린 베벨기어(16)가 회전하게 되고, 이에 따라 베벨 기어(16)의 보스부(161)에 나사 결합된 테이퍼 콜렛(14)이 어댑터(13)의 하부로 빠져나오면서 테이퍼 콜렛(14)이 자체 탄성력에 의해 벌어져 섕크 삽입공(141)이 확장되므로 테이퍼 콜렛(14)으로부터 공구(11)를 빼낼 수 있게 되는 것이다.When the driving bevel pinion 15 is rotated in the opposite direction as described above, the bevel gear 16 meshed with the driving bevel pinion 15 rotates, and thus the boss 161 of the bevel gear 16 is rotated. Tapered collet 14 screwed to the lower end of the adapter 13, the tapered collet 14 is opened by its own elastic force to expand the shank insertion hole 141, so that the tool 11 from the tapered collet 14 Will be able to pull out.
(선행기술문헌)(Prior art document)
(특허문헌 0001) 일본 특허공보 제03285809호(2002.05.27.공고)(Patent Document 0001) Japanese Patent Publication No. 03285809 (Announced on May 27, 2002)
(특허문헌 0002) 일본 특허공보 제04157420호(2008.10.01.공고)(Patent Document 0002) Japanese Patent Publication No. 04157420 (August 1, 2008)
그러나 종래의 절삭공구 체결용 홀더는 다음과 같은 여러 가지 문제점이 있었다.However, the conventional cutting tool fastening holder has a number of problems as follows.
첫째, 홀더의 내부에 구동용 베벨 피니언(15), 베벨기어(16), 절삭액 유동부재(17)를 설치하기 위해 홀더(10)를 홀더 본체(12)와 어댑터(13)로 분할 형성하여 볼트(19)로 이들을 일체화하도록 구성되어 있어 부품수의 증가로 생산성이 저하되었다.First, the holder 10 is divided into a holder body 12 and an adapter 13 in order to install the driving bevel pinion 15, the bevel gear 16, and the cutting fluid flow member 17 in the holder. It is comprised so that these may be integrated with the bolt 19, and productivity increased because of the increase of the number of parts.
둘째, 홀더 본체(12)와 어댑터(13)를 볼트(19)로 일체화한 다음 이들의 경계면을 없어지도록 별도의 연마공정을 거쳐야 되므로 생산원가가 상승되는 요인으로 작용되었다.Second, since the holder body 12 and the adapter 13 are integrated with bolts 19, and then a separate polishing process is required to remove the interface between them, production cost increases.
셋째, 반복 사용으로 구동용 베벨 피니언(15)과 베벨기어(16)의 기어부위가 마모되면 피가공물의 가공정밀도가 떨어지므로 이들 부품을 주기적으로 교체하여야만 된다.Third, when the gear parts of the driving bevel pinion 15 and the bevel gear 16 are worn down due to repeated use, machining precision of the workpiece is reduced, so these parts must be replaced periodically.
이를 위해서는 홀더 본체(12)와 어댑터(13)를 고정하고 있던 볼트(19)를 풀어 부품의 교체작업을 실시하는데, 부품의 교체작업이 완료된 다음 볼트(19)를 이용하여 홀더 본체(12)와 어댑터(13)를 조립하였을 때에는 홀더 본체(12)와 어댑터(13)의 중심인 수직도를 일치시키는데 한계가 있어 피가공물의 가공정밀도를 떨어뜨리는 치명적인 결함이 있었다.To this end, the bolt 19, which is fixed to the holder main body 12 and the adapter 13, is loosened to replace the parts. After the replacement of the parts is completed, the holder main body 12 and the bolts 19 are used. When the adapter 13 is assembled, there is a limit in matching the perpendicularity of the holder body 12 and the center of the adapter 13, and there is a fatal defect that degrades the processing accuracy of the workpiece.
본 발명은 종래의 이와 같은 문제점을 해결하기 위해 안출한 것으로써, 홀더 본체를 분할하지 않고 단일형상으로 된 홀더의 내부에 구동 나사기어 및 스핀들을 설치할 수 있도록 하여 필요에 따라 구동 나사기어 및 스핀들을 교체하더라도 홀더의 중심인 수직도가 변하지 않도록 하는 데 그 목적이 있다.The present invention has been made to solve such a problem in the prior art, it is possible to install the drive screw gear and the spindle in the interior of the single-shaped holder without dividing the holder body, so that the drive screw gear and spindle as needed The purpose is to ensure that the verticality of the center of the holder does not change even if it is replaced.
상기 목적을 달성하기 위한 본 발명의 형태에 따르면, 상부에 테이퍼진 섕크부가 형성되고, 하부에는 콜렛의 테이퍼부와 대응되는 테이퍼부를 갖는 어댑터가 형성됨과 동시에 상기 테이퍼부와 연이어지게 장착공이 수직방향으로 형성되고 상기 섕크부와 어댑터의 경계부에는 헤드부의 저면과 맞닿는 플랜지부가 형성되어 상기 플랜지부에 장착공과 통하여지는 삽입공이 직교되게 형성되며, 상기 어댑터에 회전방지부재 체결공이 형성된 일체형의 홀더 본체와, 상기 홀더 본체의 중심에 형성된 장착공을 통해 내장되고 섕크부의 내부에 나사 결합되는 제1 숫나사부가 일단에 형성됨과 동시에 타단에는 제1 숫나사부와 나사산이 반대인 제2 숫나사부가 형성되며, 상기 제1,2 숫나사부의 사이에는 피동 나사기어가 일체로 형성된 스핀들과, 상기 홀더 본체에 형성된 플랜지부의 삽입공을 통해 설치되어 스핀들의 피동 나사기어에 맞물리는 구동 나사기어와, 상기 홀더 본체에 형성된 삽입공에 나사 결합되어 구동 나사기어의 삽입부위를 폐쇄하며, 중심부에는 공구삽입공이 형성된 캡과, 상기 어댑터의 하부를 통해 삽입되어 스핀들의 제2 숫나사부에 나사 결합되는 제1 암나사부를 갖으며, 수직으로 기다란 장공이 관통되게 형성된 슬라이더와, 상기 홀더 본체의 어댑터에 형성된 회전방지부재 체결공을 통해 슬라이더의 장공을 통과되게 설치되어 슬라이더의 회전을 억제하여 슬라이더가 승, 하강하도록 하는 회전방지부재로 구성하여 콜렛이 어댑터의 콜렛 보관유지공을 통해 삽입되어 슬라이더에 나사 결합된 것을 특징으로 하는 절삭공구 체결용 홀더가 제공된다.According to an aspect of the present invention for achieving the above object, a tapered shank portion is formed at the upper portion, and an adapter having a tapered portion corresponding to the tapered portion of the collet is formed at the lower portion thereof, and the mounting hole is vertically connected to the tapered portion at the same time. And a flange portion contacting the bottom surface of the head portion at a boundary portion of the shank portion and the adapter so that an insertion hole through the mounting hole is orthogonal to the flange portion, and an integral holder body having a rotation preventing member fastening hole formed at the adapter; The first male thread part is built in the mounting hole formed in the center of the holder body and screwed into the shank part at one end thereof, and at the other end, a second male thread part opposite to the first male thread part is formed at the other end. A spindle having a driven screw gear integrally formed between two male threads, It is installed through the insertion hole formed in the flange portion is engaged with the driven screw gear of the spindle, and screwed into the insertion hole formed in the holder body to close the insertion portion of the drive screw gear, the center of the tool insertion hole is formed A first female threaded portion inserted through a lower portion of the adapter and screwed to a second male threaded portion of the spindle, the slider being formed to penetrate a long vertical hole, and an anti-rotation member formed on the adapter of the holder body; It is installed to pass through the long hole of the slider through the ball to suppress the rotation of the slider to prevent the slider to move up and down so that the collet is inserted through the collet holding hole of the adapter is screwed to the slider A holder for fastening a cutting tool is provided.
본 발명은 종래의 절삭공구 체결용 홀더에 비하여 다음과 같은 여러 가지 장점을 갖는다.The present invention has the following advantages over the holder for fastening cutting tools.
첫째, 홀더 본체가 일체형으로 이루어져 있어 부품을 교체하더라도 수직도가 변하는 것을 미연에 방지하게 되므로 홀더 본체의 정밀도를 항상 일정하게 유지할 수 있게 된다.First, since the holder body is formed in one piece, even if the component is replaced, the vertical degree is prevented in advance, so that the precision of the holder body can be constantly maintained.
둘째, 홀더의 구성이 간소화되어 부품 수를 줄일 수 있게 되므로 생산원가를 절감하게 된다.Second, since the configuration of the holder can be simplified to reduce the number of parts, the production cost is reduced.
셋째, 홀더 본체가 일체형으로 이루어져 있어 별도의 연마공정을 생략할 수 있게 되므로 생산성을 향상시키게 된다.Third, since the holder body is made in one piece, it is possible to omit a separate polishing process, thereby improving productivity.
도 1은 종래의 절삭공구체결용 홀더의 종단면도1 is a longitudinal cross-sectional view of a conventional cutting tool fastening holder
도 2는 도 1의 A - A선 단면도2 is a cross-sectional view taken along the line A-A of FIG.
도 3은 본 발명의 일 실시예를 나타낸 사시도3 is a perspective view showing one embodiment of the present invention
도 4는 본 발명의 일 실시예를 일부 단면으로 나타낸 사시도4 is a perspective view showing a partial cross section of an embodiment of the present invention;
도 5는 본 발명의 요부를 나타낸 분해 사시도5 is an exploded perspective view showing the main part of the present invention.
도 6은 도 5의 조립상태 사시도6 is an assembled perspective view of FIG.
도 7은 본 발명에서 스핀들의 피동 나사기어에 구동 나사기어가 맞물려 있는 상태를 나타낸 평면도 7 is a plan view showing a state in which the drive screw gear is engaged with the driven screw gear of the spindle in the present invention.
도 8a 및 도 8b는 본 발명의 작동상태를 설명하기 위한 도 3의 종단면도로써,8A and 8B are longitudinal cross-sectional views of FIG. 3 for explaining the operating state of the present invention.
도 8a는 슬라이더가 하사점에 위치되어 콜렛의 섕크 삽입공이 벌어져 공구의 홀딩상태가 해제된 상태도8A is a state where the slider is located at the bottom dead center and the shank insertion hole of the collet is opened to release the holding state of the tool.
도 8b는 슬라이더가 상사점에 위치되어 콜렛의 섕크 삽입공이 오므러져 공구를 홀딩한 상태도8b is a state where the slider is located at the top dead center and the shank insertion hole of the collet is collapsed to hold the tool;
도 9는 본 발명의 다른 실시예를 나타낸 평면도9 is a plan view showing another embodiment of the present invention
이하, 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 도면들은 개략적이고 축적에 맞게 도시되지 않았다는 것을 일러둔다. 도면에 있는 부분들의 상대적인 치수 및 비율은 도면에서의 명확성 및 편의를 위해 그 크기에 있어 과장되거나 감소되어 도시되었으며 임의의 치수는 단지 예시적인 것이지 한정적인 것은 아니다. 그리고 둘 이상의 도면에 나타나는 동일한 구조물, 요소 또는 부품에는 동일한 참조 부호가 유사한 특징을 나타내기 위해 사용된다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. It is noted that the figures are schematic and not drawn to scale. The relative dimensions and ratios of the parts in the figures have been exaggerated or reduced in size for clarity and convenience in the figures and any dimensions are merely exemplary and not limiting. And the same reference numerals are used to refer to similar features in the same structure, element or part shown in more than one figure.
도 4는 본 발명의 일 실시예를 일부 단면으로 나타낸 사시도이고 도 5는 본 발명의 요부를 나타낸 분해 사시도이며 도 8a 및 도 8b는 본 발명의 작동상태를 설명하기 위한 도 3의 종단면도로써, 본 발명은 일체형의 홀더 본체(30), 홀더 본체에 설치되어 공 회전하는 스핀들(40), 스핀들(40)을 회전시키는 구동 나사기어(50), 홀더 본체(30)에서 구동 나사기어(50)가 이탈되지 않도록 하는 캡(60), 스핀들(40)에 고정되어 승, 하강하는 슬라이더(70), 슬라이더의 회전을 방지하는 회전방지부재(80), 슬라이더(70)에 고정되어 공구(도시는 생략함)를 홀딩하는 콜렛(90) 등으로 구성되어 있다.Figure 4 is a perspective view showing a part of the embodiment of the present invention and Figure 5 is an exploded perspective view showing the main part of the present invention Figures 8a and 8b is a longitudinal cross-sectional view of Figure 3 for explaining the operating state of the present invention, The present invention is an integrated holder main body 30, the spindle 40 is installed in the holder main body to rotate in rotation, the drive screw gear 50 for rotating the spindle 40, the drive screw gear 50 in the holder main body 30 Is fixed to the cap 60, the slider 70 is fixed to the spindle 40 to prevent the deviation from being separated, the slider 70 to prevent the rotation of the slider, the rotation preventing member 80 to prevent the rotation of the slider, the slider 70 And a collet 90 holding the same).
상기 홀더 본체(30)에는 상부에 테이퍼진 섕크부(31)가 형성되어 있고 하부에는 콜렛(90)의 테이퍼부(91)와 대응되는 테이퍼부(32a)를 갖는 어댑터(32)가 형성되어 있으며 상기 섕크부(31)와 어댑터(32)의 경계부에는 헤드부(9)의 저면과 맞닿는 플랜지부(33)가 형성되어 있다.The holder body 30 has a tapered shank portion 31 formed at the upper portion thereof, and an adapter 32 having a tapered portion 32a corresponding to the tapered portion 91 of the collet 90 is formed at the lower portion thereof. At the boundary portion of the shank portion 31 and the adapter 32, a flange portion 33 which abuts on the bottom surface of the head portion 9 is formed.
상기 홀더 본체(30)의 중심에는 도 4 및 도 8a에 나타낸 바와 같이 어댑터(32)에 형성된 테이퍼부(32a)와 연이어지게 장착공(34)이 수직방향으로 형성되어 있고 상기 플랜지부(33)에는 장착공(34)과 통하여지는 삽입공(35)이 직교되게 형성되어 있으며, 상기 어댑터(32)에는 회전방지부재 체결공(38)이 형성되어 있다.As shown in FIGS. 4 and 8A, a mounting hole 34 is vertically formed at the center of the holder main body 30 so as to be connected to the tapered portion 32a formed in the adapter 32. The mounting hole 34 and the insertion hole 35 through which is formed to be orthogonal to each other, the adapter 32 has a rotation preventing member fastening hole 38 is formed.
이때, 상기 섕크부(31)의 내부에 위치하는 장착공(34)의 상부에는 제3 암나사부(31a)가 형성되어 있다.At this time, a third female thread portion 31a is formed at an upper portion of the mounting hole 34 located in the shank portion 31.
상기 스핀들(40)은 홀더 본체(30)의 중심에 형성된 장착공(34)을 통해 내장되는 것으로, 도 5와 같이 일단에 섕크부(31) 내에 형성된 제3 암나사부(31a)에 나사 결합되는 제1 숫나사부(41)가 형성되어 있고 타단에는 제1 숫나사부(41)와 나사산이 반대인 제2 숫나사부(42)가 형성되어 있으며, 상기 제1,2 숫나사부(41)(42)의 사이에는 피동 나사기어(43)가 일체로 형성되어 있다.The spindle 40 is embedded through the mounting hole 34 formed in the center of the holder body 30, and is screwed to the third female thread portion 31a formed in the shank portion 31 at one end as shown in FIG. A first male thread portion 41 is formed, and at the other end, a second male thread portion 42 having a thread opposite to the first male thread portion 41 is formed, and the first and second male thread portions 41 and 42 are formed. The driven screw gear 43 is integrally formed between them.
본 발명에서는 제1 숫나사부(41)를 오른나사로 하고, 제2 숫나사부(42)는 왼나사로 적용하였다.In the present invention, the first male thread portion 41 is used as the right screw, and the second male thread portion 42 is applied as the left screw.
이는, 스핀들(40)의 시계방향 공 회전으로 제2 숫나사부(42)가 슬라이더(70)의 제1 암나사부(71)에 잠기도록 하여 슬라이더(70)가 상승하도록 하기 위한 것이다.This is to allow the slider 70 to rise by locking the second male threaded portion 42 to the first female threaded portion 71 of the slider 70 by the clockwise idle rotation of the spindle 40.
상기 구동 나사기어(50)는 도 5 및 도 7과 같이 스핀들(40)의 피동 나사기어(43)와 맞물려 스핀들(40)을 회전시키는 것으로, 상기 홀더 본체(30)에 형성된 플랜지부(33)의 삽입공(35)을 통해 설치되어 스핀들(40)의 피동 나사기어(43)에 맞물려있고 일면에는 공구삽입홈(51)이 형성되어 있다. The driving screw gear 50 rotates the spindle 40 by engaging the driven screw gear 43 of the spindle 40 as shown in FIGS. 5 and 7, and the flange portion 33 formed on the holder body 30. It is installed through the insertion hole 35 of the engaged with the driven screw gear 43 of the spindle 40, the tool insertion groove 51 is formed on one surface.
상기 캡(60)은 삽입공(35)을 통해 설치된 구동 나사기어(50)가 이탈되지 않도록 삽입공(35)의 입구를 폐쇄하는 것으로, 홀더 본체(30)에 형성된 삽입공(35)에 나사 결합되고, 중심부에는 도 6과 같이 렌치(도시는 생략함)를 구동 나사기어(50)에 형성된 공구삽입홈(51)으로 끼우도록 하는 공구삽입공(61)이 형성되어 있다. The cap 60 is to close the inlet of the insertion hole 35 so that the driving screw gear 50 installed through the insertion hole 35 is not separated, and the cap 60 is screwed into the insertion hole 35 formed in the holder body 30. 6, a tool insertion hole 61 is formed at the center to insert a wrench (not shown) into the tool insertion groove 51 formed in the driving screw gear 50, as shown in FIG.
본 발명의 일 실시예에서는 상기 홀더 본체(30)의 플랜지부(33)에 관통되게 형성되는 삽입공(35)이 도 4와 같이 제2 암나사부(36a)를 갖는 대경부(36)와 소경부(37)로 형성되어 있고, 상기 구동 나사기어(50)의 일 측으로는 소경부(37)에 조립되는 돌출부(52)가 형성되어 있어 상기 대경부(36)를 통해 구동 나사기어(50)를 조립하면 돌출부(52)가 소경부(37)에 끼워짐과 동시에 대경부(36)의 입구는 제2 암나사부(36a)에 나사 결합되는 캡(60)에 의해 폐쇄하도록 되어 있다.In an embodiment of the present invention, the insertion hole 35 formed to penetrate the flange portion 33 of the holder body 30 has a large diameter portion 36 and a small diameter having a second female thread portion 36a as shown in FIG. 4. Is formed of a neck portion 37, one side of the drive screw gear 50 is formed with a protrusion 52 is assembled to the small diameter portion 37, the drive screw gear 50 through the large diameter portion (36) Is assembled, the protrusion 52 is fitted to the small diameter portion 37 and the inlet of the large diameter portion 36 is closed by the cap 60 which is screwed to the second female screw portion 36a.
상기 홀더 본체(30)에 구동 나사기어(50)를 1개만 설치하여도 되지만, 공구(도시는 생략함)의 착탈이 용이하도록 도 9와 같이 상기 홀더 본체(30)에 180°위상차를 갖도록 삽입공(35)을 형성하여 상기 각 삽입공(35)에 피동 나사기어(43)와 맞물리는 구동 나사기어(50)를 설치하고 상기 삽입공(35)의 입구는 캡(60)으로 폐쇄하도록 구성할 수도 있음은 이해 가능한 것이다.Although only one driving screw gear 50 may be installed in the holder main body 30, the holder main body 30 may be inserted to have a 180 ° phase difference in the holder main body 30 as shown in FIG. 9 to facilitate attachment and detachment of a tool (not shown). Forming a hole (35) to install a drive screw gear 50 for engaging the driven screw gear 43 in each of the insertion hole 35 and the inlet of the insertion hole 35 is configured to close with a cap 60 It is understandable.
상기 슬라이더(70)는 스핀들(40)의 회전운동을 콜렛(90)에 수직운동으로 전환하여 전달하는 것으로, 스핀들(40)의 제2 숫나사부(42)에 나사 결합되는 제1 암나사부(71)가 형성되어 있고 측면에는 수직으로 기다란 장공(72)이 관통되게 형성되어 있다. The slider 70 transfers the rotational movement of the spindle 40 to the collet 90 by transferring the rotational movement of the spindle 40 to the collet 90. The first female threaded portion 71 is screwed to the second male threaded portion 42 of the spindle 40. ) Is formed and a long elongated hole 72 is formed in the side.
상기 회전방지부재(80)는 슬라이더(70)의 회전을 억제하여 승, 하강하도록 하는 것으로, 상기 어댑터(32)에 형성된 회전방지부재 체결공(38)을 통해 슬라이더(70)의 장공(72)을 통과되게 설치되어 타단이 어댑터(32)에 형성된 삽입홈(38a)에 끼워져 있는데, 상기 회전방지부재(80)는 도 4와 같이 어댑터(32)에 나사 결합함에 따라 고정된다.The anti-rotation member 80 is to increase and decrease the rotation of the slider 70, the long hole 72 of the slider 70 through the anti-rotation member fastening hole 38 formed in the adapter 32 It is installed to pass through the other end is inserted into the insertion groove (38a) formed in the adapter 32, the rotation preventing member 80 is fixed by screwing the adapter 32 as shown in FIG.
상기 콜렛(90)은 공구를 홀딩하거나 홀딩상태를 해제하는 것으로, 어댑터(32)의 콜렛 보관유지공(39)을 통해 삽입되어 슬라이더(70)에 나사 결합되는데, 종래의 콜렛과 동일하므로 그 구조에 대한 구체적인 설명은 생략하기로 한다.The collet 90 is to hold the tool or release the holding state. The collet 90 is inserted through the collet holding hole 39 of the adapter 32 to be screwed to the slider 70. Since the collet 90 is the same as the conventional collet, its structure Detailed description thereof will be omitted.
이와 같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above is as follows.
먼저, 도 8a와 같이 슬라이더(70)에 고정된 콜렛(90)이 어댑터(32)의 콜렛 보관유지공(39)으로부터 최대한 빠져나온 상태에서는 콜렛(90)의 테이퍼부(91)가 어댑터(32)의 테이퍼부(32a)와 이격되어 있으므로 복수 개의 절개부(92)를 갖는 콜렛(90)의 섕크 삽입공(93)은 자체 탄성력에 의해 최대한 확장된 상태이므로 공구를 교체할 수 있게 된다.First, in the state where the collet 90 fixed to the slider 70 as far out as possible from the collet holding hole 39 of the adapter 32 as shown in FIG. 8A, the taper portion 91 of the collet 90 is connected to the adapter 32. Since the shank insertion hole 93 of the collet 90 having a plurality of incisions 92 is spaced apart from the taper portion 32a of the (), the tool can be replaced since it is in the state of maximum expansion by its own elastic force.
즉, 구동 나사기어(50)의 반시계방향 회전으로 스핀들(40)이 회전하면 슬라이더(70)에 나사 결합된 제2 숫나사부(42)는 제1 숫나사부(41)와 반대인 왼 나사로 형성되어 있어 슬라이더(70)가 제2 숫 나사부(42)로부터 빠져나오게 되므로 슬라이더(70)는 회전방지부재(80)에 의해 회전되지 않고 콜렛(90)과 함께 하강하게 되는 것이다.That is, when the spindle 40 rotates in the counterclockwise rotation of the drive screw gear 50, the second male thread portion 42 screwed to the slider 70 is formed of a left screw opposite to the first male thread portion 41. Since the slider 70 is released from the second male threaded portion 42, the slider 70 is lowered together with the collet 90 without being rotated by the rotation preventing member 80.
*이러한 상태에서 사용하고자 하는 공구를 콜렛(90)에 장착하고자 할 경우에는 공구를 파지한 상태에서 공구의 섕크부를 콜렛(90)의 섕크 삽입공(93)으로 적정 깊이이상 밀어넣은 다음 렌치 등의 공구를 이용하여 구동 나사기어(50)를 회전시켜야 된다.* If the tool to be used in this state is to be mounted on the collet 90, push the shank portion of the tool into the shank insertion hole 93 of the collet 90 at an appropriate depth while holding the tool, and then The drive screw gear 50 must be rotated using a tool.
이하에서는 구동 나사기어(50)를 회전시킴에 따라 콜렛(90)이 공구의 섕크부를 홀딩하는 과정에 대하여 살펴보기로 한다.Hereinafter, a process in which the collet 90 holds the shank portion of the tool as the driving screw gear 50 is rotated will be described.
상기 렌치를 플랜지부(33)에 형성된 삽입공(35)의 입구를 폐쇄하고 있던 캡(60)의 공구삽입공(61)을 통해 집어넣어 구동 나사기어(50)에 형성된 공구삽입홈(51)에 끼우고 도 8b의 시계방향으로 회전시키면 상기 구동 나사기어(50)에 피동 나사기어(43)가 맞물려있어 스핀들(40)이 공 회전하게 된다.The wrench is inserted through the tool insertion hole 61 of the cap 60, which is closing the inlet of the insertion hole 35 formed in the flange portion 33, and the tool insertion groove 51 formed in the drive screw gear 50. 8B, the driven screw gear 43 is engaged with the driving screw gear 50 so that the spindle 40 co-rotates.
이와 같이 스핀들(40)이 공 회전하면 슬라이더(70)에 형성된 제1 암나사부(71)에 제1 숫나사부(41)와 반대방향인 왼나사의 제2 숫나사부(42)가 나사 결합되어 있어 제1 암나사부(71)가 제2 숫나사부(42)에 잠기게 되므로 슬라이더(70)도 스핀들(40)과 함께 상승하게 된다.When the spindle 40 rotates in this manner, the second male thread portion 42 of the left hand thread opposite to the first male thread portion 41 is screwed to the first female thread portion 71 formed on the slider 70. Since the first female threaded portion 71 is locked to the second male threaded portion 42, the slider 70 also rises together with the spindle 40.
이때, 슬라이더(70)에 형성된 장공(72)에는 회전방지부재(80)가 끼워져 있어 슬라이더(70)는 회전하지 않고 장착공(34)을 따라 상승하게 된다.At this time, the anti-rotation member 80 is fitted to the long hole 72 formed in the slider 70 so that the slider 70 does not rotate but rises along the mounting hole 34.
전술한 바와 같은 동작에 의해 슬라이더(70)가 점진적으로 상승하면 상기 슬라이더(70)와 고정된 콜렛(90)도 함께 상승하게 되고, 이에 따라 콜렛(90)의 외주면 하부에 형성된 테이퍼부(91)가 어댑터(32)의 내면에 형성된 테이퍼부(32a)에 의해 눌려 조여지므로 도 8b와 같이 콜렛(90)이 공구의 섕크부를 홀딩하게 되는 것이다.When the slider 70 is gradually raised by the above-described operation, the slider 70 and the collet 90 fixed are also raised together, and accordingly, the taper portion 91 formed below the outer circumferential surface of the collet 90 is raised. Is pressed by the tapered portion 32a formed on the inner surface of the adapter 32, so that the collet 90 holds the shank portion of the tool as shown in FIG. 8B.
이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 본 발명이 속하는 기술분야의 통상의 지식을 가진 자는 기술적 사상이나 필수적 특징을 변경하지 않고 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다.Although the embodiments of the present invention have been described above with reference to the accompanying drawings, it will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features. will be.
그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로서 이해되어야 하고, 상기 상세한 설명에서 기술된 본 발명의 범위는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention described in the above detailed description is represented by the following claims, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.
[부호의 설명][Description of the code]
30 : 홀더 본체 31 : 섕크부30: holder body 31: shank portion
31a : 제3 암나사부 32 : 어댑터31a: 3rd female thread part 32: adapter
32a : 테이퍼부 33 : 플랜지부32a: taper portion 33: flange portion
34 : 장착공 35 : 삽입공34: mounting hole 35: insertion hole
38 : 회전방지부재 체결공 39 : 콜렛 보관 유지공38: anti-rotation member fastening hole 39: collet holding hole
40 : 스핀들 41 : 제1 숫나사부40: spindle 41: first male threaded portion
42 : 제2 숫나사부 43 : 피동 나사기어42: second male thread 43: driven screw gear
50 : 구동 나사기어 60 : 캡50: drive screw gear 60: cap
70 : 슬라이더 72 : 장공70: slider 72: long
80 : 회전방지부재 90 : 콜렛80: rotation preventing member 90: collet
91 : 테이퍼부 92 : 절개부91: taper portion 92: incision
93 : 섕크 삽입공93: shank insertion hole

Claims (4)

  1. 상부에 테이퍼진 섕크부(31)가 형성되고, 하부에는 콜렛(90)의 테이퍼부(91)와 대응되는 테이퍼부(32a)를 갖는 어댑터(32)가 형성됨과 동시에 상기 테이퍼부(32a)와 연이어지게 장착공(34)이 수직방향으로 형성되고 상기 섕크부(31)와 어댑터(32)의 경계부에는 헤드부(9)의 저면과 맞닿는 플랜지부(33)가 형성되어 상기 플랜지부(33)에 장착공(34)과 통하여지는 삽입공(35)이 직교되게 형성되며, 상기 어댑터(32)에 회전방지부재 체결공(38)이 형성된 일체형의 홀더 본체(30)와, A tapered shank portion 31 is formed at the upper portion, and an adapter 32 having a tapered portion 32a corresponding to the tapered portion 91 of the collet 90 is formed at the lower portion thereof. Successively, the mounting hole 34 is formed in the vertical direction, and the flange portion 33 is formed at the boundary between the shank portion 31 and the adapter 32 to be in contact with the bottom surface of the head portion 9. The insertion hole 35 is passed through the mounting hole 34 in the orthogonal shape, and the holder body 30 of the integral type formed with a rotation preventing member fastening hole 38 in the adapter 32,
    상기 홀더 본체(30)의 중심에 형성된 장착공(34)을 통해 내장되고 섕크부(31)의 내부에 나사 결합되는 제1 숫나사부(41)가 일단에 형성됨과 동시에 타단에는 제1 숫나사부(41)와 나사산이 반대인 제2 숫나사부(42)가 형성되며, 상기 제1,2 숫나사부(41)(42)의 사이에는 피동 나사기어(43)가 일체로 형성된 스핀들(40)과, A first male thread portion 41 is formed at one end and is mounted through a mounting hole 34 formed at the center of the holder main body 30 and screwed into the shank portion 31. A second male thread portion 42 having a screw thread opposite to that of the screw thread 41, and a spindle 40 in which a driven screw gear 43 is integrally formed between the first and second male thread portions 41 and 42;
    상기 홀더 본체(30)에 형성된 플랜지부(33)의 삽입공(35)을 통해 설치되어 스핀들(40)의 피동 나사기어(43)에 맞물리는 구동 나사기어(50)와,A driving screw gear 50 installed through the insertion hole 35 of the flange portion 33 formed in the holder main body 30 and engaged with the driven screw gear 43 of the spindle 40;
    상기 홀더 본체(30)에 형성된 삽입공(35)에 나사 결합되어 구동 나사기어(50)의 삽입부위를 폐쇄하며, 중심부에는 공구삽입공(61)이 형성된 캡(60)과,Cap 60 is screwed to the insertion hole 35 formed in the holder body 30 to close the insertion portion of the drive screw gear 50, the center of the cap 60 with a tool insertion hole 61,
    상기 어댑터(32)의 하부를 통해 삽입되어 스핀들(40)의 제2 숫나사부(42)에 나사 결합되는 제1 암나사부(71)를 갖으며, 수직으로 기다란 장공(72)이 관통되게 형성된 슬라이더(70)와,A slider having a first female thread portion 71 inserted through a lower portion of the adapter 32 and screwed to the second male thread portion 42 of the spindle 40, and having a vertically elongated hole 72 penetrated therethrough. 70,
    상기 홀더 본체(30)의 어댑터(32)에 형성된 회전방지부재 체결공(38)을 통해 슬라이더(70)의 장공(72)을 통과되게 설치되어 슬라이더(70)의 회전을 억제하여 슬라이더(70)가 승, 하강하도록 하는 회전방지부재(80)로 구성하여 콜렛(90)이 어댑터(32)의 콜렛 보관유지공(39)을 통해 삽입되어 슬라이더(70)에 나사 결합된 것을 특징으로 하는 절삭공구 체결용 홀더.The slider 70 is installed to pass through the long hole 72 of the slider 70 through the anti-rotation member fastening hole 38 formed in the adapter 32 of the holder body 30 to suppress the rotation of the slider 70. The cutting tool, characterized in that the collet 90 is inserted through the collet holding hole 39 of the adapter 32 is screwed to the slider 70 by configuring the anti-rotation member 80 to move up and down Holder for fastening.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 홀더 본체(30)의 플랜지부(33)에 관통되게 형성되는 삽입공(35)을 제2 암나사부(36a)를 갖는 대경부(36)와 소경부(37)로 형성하고, 상기 구동 나사기어(50)의 일 측으로는 소경부(37)에 조립되는 돌출부(52)를 형성하여 상기 대경부(36)를 통해 구동 나사기어(50)를 조립하면 돌출부(52)가 소경부(37)에 끼워짐과 동시에 대경부(36)의 입구는 캡(60)에 의해 폐쇄한 것을 특징으로 하는 절삭공구 체결용 홀더.The insertion hole 35 formed to penetrate the flange portion 33 of the holder main body 30 is formed of the large diameter portion 36 and the small diameter portion 37 having the second female screw portion 36a, and the drive screw. One side of the gear 50 forms a protrusion 52 that is assembled to the small diameter portion 37, and when the driving screw gear 50 is assembled through the large diameter portion 36, the protrusion 52 is the small diameter portion 37. At the same time the inlet of the large diameter portion 36 is closed by the cap 60, the holder for fastening the cutting tool, characterized in that.
  3. 청구항 1 또는 청구항 2에 있어서,The method according to claim 1 or 2,
    상기 홀더 본체(30)에 180°위상차를 갖도록 삽입공(35)을 형성하여 상기 각 삽입공(35)에 피동 나사기어(43)와 맞물리는 구동 나사기어(50)를 설치하고 상기 삽입공(35)의 입구는 캡(60)으로 폐쇄한 것을 특징으로 하는 절삭공구 체결용 홀더.Inserting holes 35 are formed in the holder main body 30 so as to have a 180 ° phase difference to install driving screw gears 50 engaged with the driven screw gears 43 in the respective insertion holes 35, and the insertion holes ( 35) The inlet of the cutting tool fastening holder, characterized in that closed with a cap (60).
  4. 청구항 1에 있어서, The method according to claim 1,
    상기 구동 나사기어(50)의 일면에 공구삽입홈(51)이 형성된 것을 특징으로 하는 절삭공구 체결용 홀더.Holder for fastening cutting tools, characterized in that the tool insertion groove 51 is formed on one surface of the drive screw gear (50).
PCT/KR2018/004003 2017-04-07 2018-04-05 Holder for cutting-tool fastening WO2018186690A1 (en)

Applications Claiming Priority (2)

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CN114310372A (en) * 2021-12-17 2022-04-12 安徽尧工数控科技有限公司 Tool bit clamping device for numerical control machine tool

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CN114310372B (en) * 2021-12-17 2024-04-09 安徽尧工数控科技有限公司 Tool bit clamping device for numerical control machine tool

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