JP2005111587A - Tool holding device - Google Patents

Tool holding device Download PDF

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JP2005111587A
JP2005111587A JP2003346471A JP2003346471A JP2005111587A JP 2005111587 A JP2005111587 A JP 2005111587A JP 2003346471 A JP2003346471 A JP 2003346471A JP 2003346471 A JP2003346471 A JP 2003346471A JP 2005111587 A JP2005111587 A JP 2005111587A
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tool
holder
holding
main body
angular position
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Kazuya Sawayama
一也 澤山
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Takamatsu Machinery Co Ltd
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Takamatsu Machinery Co Ltd
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Priority to JP2003346471A priority Critical patent/JP2005111587A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool holding device in which the positioning of an angular position when mounting a tool is easy and by which the occurrence of vibrations during working can be suppressed. <P>SOLUTION: The tool holding device is provided with a mounting holder 2, a tool holder body 4 attachably/detachably mounted to the mounting holder 2, a collet holder 6 mounted to the tool holder body 4, and a working tool 50 freely attachably/detachably mounted to the collet holder 6. The tool holding device is also provided with a first angular position holding means for holding the tool holder body 4 to the mounting holder 2 at a prescribed angular position and a second angular position holding means for holding the working tool 50 to the tool holder body 4 at a prescribed angular position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ボーリング加工用工具などの加工工具を保持するための工具保持装置に関する。   The present invention relates to a tool holding device for holding a machining tool such as a boring tool.

NC旋盤を用いて被加工物に例えばボーリング加工などの加工を行う場合、加工工具としてボーリング加工用工具(ボーリングバイト)が用いられ、このボーリング加工用工具をNC旋盤の工具テーブル(又はタレットの工具取付部)に取り付けるのに工具保持装置が用いられる。   When machining such as boring, for example, on a workpiece using an NC lathe, a boring tool (boring tool) is used as a machining tool, and this boring tool is used as a tool table (or turret tool) of an NC lathe. A tool holding device is used for attachment to the attachment portion.

このような工具保持装置として、ブッシュ部材を用いた形態のもの(例えば、特許文献1参照)と、コレットホルダを用いた形態のもの(例えば、特許文献2参照)とが存在する。ブッシュ部材を用いた形態のものは、取付ホルダに取り付けられたブッシュ部材と、ボーリング加工用工具を固定するための保持ボルトとを備えており、ボウリング加工用工具は、ブッシュ部材の孔を通して作用する保持ボルトにより固定される。また、コレットホルダを用いた形態のものは、ボーリング加工用工具を保持するためのコレットと、このコレットを締付けるための締付け部材とを備えており、ボーリング加工用工具は、締付け部材によりコレットを締め付けることによって固定される。   As such a tool holding device, there exist a thing using a bush member (for example, refer to patent documents 1) and a thing using a collet holder (for example, refer to patent documents 2). The form using the bush member includes a bush member attached to the mounting holder and a holding bolt for fixing the boring tool, and the bowling tool acts through the hole of the bush member. It is fixed by holding bolts. The type using the collet holder includes a collet for holding the boring tool and a tightening member for tightening the collet. The boring tool tightens the collet with the tightening member. Fixed by.

特開平11−58108号公報JP-A-11-58108 特開2000−79533号公報JP 2000-79533 A

ブッシュ部材を用いた形態のものでは、保持ボルトを加工工具の平坦面部に作用させて固定保持するので、取付ホルダ(即ち、これが取り付けられる工具テーブル)に対して加工工具を所定角度位置に容易に保持することができ、従って、加工工具の取付け、交換を容易に且つ短時間に行うことができる。しかし、この形態では、加工工具の基部側を保持ボルトにより固定保持するので、小径の工具を用いて加工する場合に、加工負荷が大きくなると加工工具に振動(所謂、加工時のビビリ)が発生し、被加工物を高精度に加工することができなくなり、この振動が更に大きくなると加工不能になるという問題がある。   In the configuration using the bush member, the holding bolt is applied to the flat surface portion of the processing tool to be fixed and held, so that the processing tool can be easily placed at a predetermined angular position with respect to the mounting holder (that is, the tool table to which this is attached). Accordingly, the machining tool can be easily attached and replaced in a short time. However, in this configuration, the base side of the machining tool is fixed and held by the holding bolt, so that when machining using a small diameter tool, vibration (so-called chatter during machining) occurs when the machining load increases. However, there is a problem that it becomes impossible to process the workpiece with high accuracy, and if this vibration is further increased, the processing becomes impossible.

また、コレットホルダを用いた形態のものでは、上述した形態のものに比して加工工具の先端側をコレットで固定保持するので、ブッシュ部材を用いたものに比して加工時の振動(所謂、加工時のビビリ)の発生を抑えることができるが、コレットホルダ自体が加工工具の角度位置を決めるための機構を備えていないために、取り付ける際に加工工具の刃先角度位置が定まらず、刃先角度位置を決めるためにダイヤルゲージなどを用いて行う必要があり、この角度位置調整の作業が煩雑で時間を要するという問題がある。   Also, in the form using the collet holder, the tip side of the processing tool is fixedly held by the collet as compared with the above-described form, so that vibration during machining (so-called so-called) However, since the collet holder itself does not have a mechanism for determining the angular position of the machining tool, the angular position of the cutting edge of the machining tool is not fixed when mounting, and the cutting edge In order to determine the angular position, it is necessary to use a dial gauge or the like, and there is a problem that the work for adjusting the angular position is complicated and takes time.

本発明の目的は、工具を取り付ける際の角度位置の位置決めが容易であるとともに、加工時の振動の発生をも抑えることができる工具保持装置を提供することである。   An object of the present invention is to provide a tool holding device that can easily position an angular position when a tool is attached and can suppress generation of vibration during processing.

本発明の請求項1に記載の工具保持装置は、取付ホルダと、前記取付ホルダに着脱可能に取り付けられる工具ホルダ本体と、前記工具ホルダ本体に取り付けられたコレットホルダと、前記コレットホルダに着脱自在に取り付けられる加工工具と、を備え、
前記取付ホルダ及び前記工具ホルダ本体には、前記取付ホルダに対して前記工具ホルダ本体を所定角度位置に保持するための第1角度位置保持手段が設けられ、前記工具ホルダ本体と前記加工工具には、前記工具ホルダ本体に対して前記加工工具を所定角度位置に保持するための第2角度位置保持手段が設けられていることを特徴とする。
The tool holding device according to claim 1 of the present invention is an attachment holder, a tool holder body that is detachably attached to the attachment holder, a collet holder attached to the tool holder body, and a detachable attachment to the collet holder. And a processing tool attached to
The mounting holder and the tool holder main body are provided with a first angular position holding means for holding the tool holder main body at a predetermined angular position with respect to the mounting holder, and the tool holder main body and the processing tool include A second angular position holding means for holding the machining tool at a predetermined angular position with respect to the tool holder main body is provided.

また、本発明の請求項2に記載の工具保持装置では、前記取付ホルダには、前記工具ホルダ本体を前記加工工具の軸線方向に締め付けるための締付け機構が設けられ、前記締付け機構は、前記工具ホルダ本体に螺合された締付けボルトから構成されていることを特徴とする。   In the tool holding device according to claim 2 of the present invention, the attachment holder is provided with a tightening mechanism for tightening the tool holder main body in the axial direction of the processing tool, and the tightening mechanism includes the tool It is characterized by comprising a fastening bolt screwed into the holder body.

本発明の請求項1に記載の工具保持装置によれば、取付ホルダが例えばNC旋盤の工具テーブル、タレットの工具取付部に取り付けられ、この取付ホルダに工具ホルダ本体及びコレットホルダを介して例えばボーリング加工用工具などの加工工具が取り付けられる。取付ホルダ及び工具ホルダ本体には第1角度位置保持手段が設けられているので、工具ホルダ本体は取付ホルダ(換言すると、工具テーブル、タレットの工具取付部)に対して所定角度位置に確実に保持される。また、この工具ホルダ本体及び加工工具には第2角度位置保持手段が設けられているので、加工工具は工具ホルダ本体に対して所定角度位置に確実に保持される。このように、加工工具の取付角度位置は第1及び第2角度位置保持手段により設定されるので、ダイヤルゲージなど用いることなく、容易に且つ簡単に所定の取付角度位置に保持固定することができる。また、加工工具の保持はコレットホルダにより行われ、このコレットホルダが工具ホルダ本体を介して取付ホルダに取り付けられるので、コレット保持による特徴を維持しながら加工工具を固定保持することができ、これによって、加工時の振動(所謂、加工時のビビリ)の発生を抑え、被加工物を高精度に加工することができる。   According to the tool holding apparatus of the first aspect of the present invention, the mounting holder is attached to, for example, a tool table of an NC lathe or a tool mounting portion of a turret, and the boring is performed on the mounting holder via the tool holder body and the collet holder. A processing tool such as a processing tool is attached. Since the mounting holder and the tool holder main body are provided with the first angular position holding means, the tool holder main body is securely held at a predetermined angular position with respect to the mounting holder (in other words, the tool mounting portion of the tool table and the turret). Is done. Further, since the tool holder main body and the processing tool are provided with the second angular position holding means, the processing tool is reliably held at a predetermined angular position with respect to the tool holder main body. As described above, since the mounting angle position of the processing tool is set by the first and second angle position holding means, it can be easily and easily held and fixed at a predetermined mounting angle position without using a dial gauge or the like. . In addition, the machining tool is held by a collet holder, and this collet holder is attached to the mounting holder via the tool holder body, so that the machining tool can be fixedly held while maintaining the characteristics of the collet holding. The occurrence of vibration during processing (so-called chatter during processing) can be suppressed, and the workpiece can be processed with high accuracy.

また、本発明の請求項2に記載の工具保持装置によれば、工具ホルダ本体を締め付けるための締付け機構が、工具ホルダ本体に螺合された締付けボルトから構成されているので、この締付けボルトを締付け方向に回動することによって、工具ホルダ本体が加工工具の軸線方向にも取付ホルダに確実に固定され、これによって、加工時の振動(所謂、加工時のビビリ)の発生をより効果的に抑えることができる。   According to the tool holding device of the second aspect of the present invention, the tightening mechanism for tightening the tool holder main body is composed of the tightening bolt screwed to the tool holder main body. By rotating in the tightening direction, the tool holder body is securely fixed to the mounting holder also in the axial direction of the machining tool, thereby more effectively generating vibration during machining (so-called chatter during machining). Can be suppressed.

以下、添付図面を参照して、本発明に従う工具保持装置の最良の実施形態について説明する。図1は、一実施形態の工具保持装置を示す断面図であり、図2は、図1の工具保持装置の工具ホルダ本体の内部をも断面で示す断面図であり、図3は、図1の工具保持装置を分解して示す分解斜視図である。   DESCRIPTION OF EXEMPLARY EMBODIMENTS A preferred embodiment of a tool holding device according to the invention will be described below with reference to the accompanying drawings. 1 is a cross-sectional view showing a tool holding device according to an embodiment, FIG. 2 is a cross-sectional view showing the inside of a tool holder main body of the tool holding device of FIG. 1 in cross-section, and FIG. It is a disassembled perspective view which decomposes | disassembles and shows the tool holding apparatus of FIG.

図1〜図3において、図示の工具保持装置は、取付ホルダ2と、この取付ホルダ2に取り付けられる工具ホルダ本体4と、この工具ホルダ本体4に取り付けられるコレットホルダ6とを備えている。取付ホルダ2は取付ボルト(図示せず)によって、例えばNC旋盤の工具テーブルP(又はタレットの工具取付部)(図示せず)に取り付けられる。取付ホルダ2には取付収容孔10が設けられ、この取付収容孔10は被加工物(図示せず)の軸線方向(図1及び図2において左右方向)にこれを貫通して延びている。取付ホルダ2(図1及び図2においてその上部)には、上記軸線方向に間隔をおいて一対の雌ねじ孔14が設けられ、これら雌ねじ孔14が取付収容孔10まで延びている。この取付収容孔10の一端側(図1及び図2において左端側)は開放され、その他端側(図1及び図2において右端側)はカバー部材16によって覆われている。カバー部材16は、複数個の取付ねじ18によって取付ホルダ2の端面に取り付けられ、その略中央部には、円形状の挿通孔20が設けられている。   1 to 3, the illustrated tool holding device includes an attachment holder 2, a tool holder body 4 attached to the attachment holder 2, and a collet holder 6 attached to the tool holder body 4. The attachment holder 2 is attached to a tool table P of an NC lathe (or a tool attachment portion of a turret) (not shown), for example, by an attachment bolt (not shown). The mounting holder 2 is provided with a mounting housing hole 10, and the mounting housing hole 10 extends through the workpiece (not shown) in the axial direction (left and right direction in FIGS. 1 and 2). A pair of female screw holes 14 are provided in the mounting holder 2 (in the upper part in FIGS. 1 and 2) at intervals in the axial direction, and these female screw holes 14 extend to the mounting accommodation hole 10. One end side (left end side in FIGS. 1 and 2) of the mounting accommodation hole 10 is opened, and the other end side (right end side in FIGS. 1 and 2) is covered with a cover member 16. The cover member 16 is attached to the end surface of the attachment holder 2 by a plurality of attachment screws 18, and a circular insertion hole 20 is provided at a substantially central portion thereof.

工具ホルダ本体4は略円筒状であり、その一端側は他端側よりも外径が大きく形成され、この大径部21が取付ホルダ2から外側に突出し、その他端側が取付ホルダ2の取付収容孔10に収容されるように、取付ホルダ2に着脱可能に取り付けられる。この工具ホルダ本体4の他端側の外周面には、平坦に形成された第1平坦面部22が設けられている。この第1平坦面部22は、取付ホルダ2及び工具ホルダ本体4を所定の角度位置関係に保持するときに用いられ、取付ホルダ2の各雌ねじ孔14に螺合される第1保持ボルト24とともに第1角度位置保持手段を構成する。第1保持ボルト24を締付け方向に回動し、その先端部を工具ホルダ本体4の第1平坦面部22に作用させることによって、取付ホルダ2に対して工具ホルダ本体4を所定角度位置(第1保持ボルト24の軸線に対して第1平坦面部22が実質上垂直となる角度位置)に保持して取付ホルダ2に押圧固定することができる。   The tool holder main body 4 has a substantially cylindrical shape, one end of which is formed to have an outer diameter larger than that of the other end. It is detachably attached to the attachment holder 2 so as to be accommodated in the hole 10. On the outer peripheral surface on the other end side of the tool holder main body 4, a first flat surface portion 22 formed flat is provided. The first flat surface portion 22 is used when holding the mounting holder 2 and the tool holder main body 4 in a predetermined angular positional relationship, and is used together with first holding bolts 24 screwed into the female screw holes 14 of the mounting holder 2. One-angle position holding means is configured. The first holding bolt 24 is rotated in the tightening direction, and its tip is applied to the first flat surface portion 22 of the tool holder main body 4, whereby the tool holder main body 4 is moved to a predetermined angular position (first The first flat surface portion 22 is held at an angular position where the first flat surface portion 22 is substantially perpendicular to the axis of the holding bolt 24 and can be pressed and fixed to the mounting holder 2.

この工具ホルダ本体4の大径部21には、コレットホルダ6が装着されるように構成されている。工具ホルダ本体4には、その軸線方向に貫通して工具収容孔28が設けられ、この工具収容孔28の一端部(大径部21に対応する部位)には、軸線方向内方に向けて内径が漸減するテーパ部30が設けられ、その他端部には雌ねじ部34が設けられている。   The collet holder 6 is mounted on the large diameter portion 21 of the tool holder body 4. The tool holder main body 4 is provided with a tool accommodation hole 28 penetrating in the axial direction thereof, and one end portion of the tool accommodation hole 28 (a portion corresponding to the large diameter portion 21) is directed inward in the axial direction. A tapered portion 30 having an inner diameter that gradually decreases is provided, and a female screw portion 34 is provided at the other end portion.

コレットホルダ6は、コレット36と、コレット36による加工工具の保持、解除を行うためのナット部材38とから構成されている。コレット36には、その軸線方向に貫通して挿通孔40が設けられているともに、その一端側(図2及び図3において左部)には、軸線方向内方(図2において右方)に向けて外径が漸増する第1テーパ部42が設けられ、その他端側(図2及び図3において右部)には、軸線方向内方(図2において右方)に向けて外径が漸減する第2テーパ部44が設けられ、これら第1及び第2テーパ部42,44には、軸線方向に延びるスリット43,45が周方向に間隔をおいて複数設けられている。コレット36の第2テーパ部44は、工具ホルダ本体4の工具収容孔28のテーパ部30に対応し、このテーパ部30の内周側に装着される。また、ナット部材38の一端部内周面には、コレット36の第1テーパ部42に対応するテーパ部46が設けられ、その他端部内周面には雌ねじ部48が設けられている。更に、工具ホルダ本体4の大径部21の一端部(先端部)の外周面には雄ねじ部51が設けられている。このように構成されているので、工具ホルダ本体4の雄ねじ部51にナット部材38の雌ねじ部48を螺合して締め付けると、ナット部材38のテーパ部46がコレット36の第1テーパ部42に作用してこれを縮径するとともに、工具ホルダ本体4のテーパ部30がコレット36の第2テーパ部44に作用してこれを縮径する。   The collet holder 6 includes a collet 36 and a nut member 38 for holding and releasing the processing tool by the collet 36. The collet 36 is provided with an insertion hole 40 penetrating in the axial direction thereof, and on one end side (left part in FIGS. 2 and 3) on the inner side in the axial direction (right side in FIG. 2). A first taper portion 42 whose outer diameter gradually increases is provided, and the outer diameter gradually decreases inward in the axial direction (rightward in FIG. 2) on the other end side (right portion in FIGS. 2 and 3). The first and second taper portions 42 and 44 are provided with a plurality of slits 43 and 45 extending in the axial direction at intervals in the circumferential direction. The second taper portion 44 of the collet 36 corresponds to the taper portion 30 of the tool housing hole 28 of the tool holder body 4 and is attached to the inner peripheral side of the taper portion 30. Further, a taper portion 46 corresponding to the first taper portion 42 of the collet 36 is provided on the inner peripheral surface of one end portion of the nut member 38, and a female screw portion 48 is provided on the inner peripheral surface of the other end portion. Further, a male screw portion 51 is provided on the outer peripheral surface of one end portion (tip portion) of the large diameter portion 21 of the tool holder body 4. With this configuration, when the female screw portion 48 of the nut member 38 is screwed into the male screw portion 51 of the tool holder body 4 and tightened, the taper portion 46 of the nut member 38 becomes the first taper portion 42 of the collet 36. The taper portion 30 of the tool holder body 4 acts on the second taper portion 44 of the collet 36 to reduce the diameter thereof.

ボーリング加工用工具の如き加工工具50は、コレットホルダ6に取り付けられる工具本体部52と、この工具本体部52の先端部に設けられたバイト部54とを有している。工具本体部52はコレット36の挿通孔40を通して工具ホルダ本体4の工具収容孔28に挿入される。この工具本体部52の軸線方向中間部には、平坦に形成された第2平坦面部56が設けられている。この第2平坦面部56は、工具ホルダ本体4及び加工工具50を所定の角度位置関係に保持するときに用いられ、工具ホルダ本体4の雌ねじ孔58に螺合される第2保持ボルト60(例えば、ホーローボルトから構成される)とともに第2角度位置保持手段を構成する。この形態では、工具ホルダ本体4の工具収容孔28にブッシュ部材62が装着され、このブッシュ部材62に孔64が設けられ、第2保持ボルト60の先端部はブッシュ部材60の孔64を通して加工工具50に作用する。第2保持ボルト60を締付け方向に回動し、その先端部をブッシュ部材62を通して加工工具50の第2平坦面部56に作用させることによって、工具ホルダ本体4に対して加工工具50を所定角度位置(第2保持ボルト60の軸線に対して第2平坦面部56が実質上垂直となる角度位置)に保持して工具ホルダ本体4に押圧固定することができる。   A machining tool 50 such as a boring tool has a tool body portion 52 attached to the collet holder 6 and a bite portion 54 provided at the tip of the tool body portion 52. The tool body 52 is inserted into the tool receiving hole 28 of the tool holder body 4 through the insertion hole 40 of the collet 36. A second flat surface portion 56 formed flat is provided at an intermediate portion in the axial direction of the tool main body portion 52. The second flat surface portion 56 is used when the tool holder main body 4 and the processing tool 50 are held in a predetermined angular positional relationship, and a second holding bolt 60 (for example, screwed into the female screw hole 58 of the tool holder main body 4). , And the second angular position holding means. In this embodiment, a bush member 62 is mounted in the tool accommodation hole 28 of the tool holder body 4, a hole 64 is provided in the bush member 62, and the tip of the second holding bolt 60 passes through the hole 64 of the bush member 60. Act on 50. By rotating the second holding bolt 60 in the tightening direction and causing the tip end portion to act on the second flat surface portion 56 of the processing tool 50 through the bush member 62, the processing tool 50 is positioned at a predetermined angular position with respect to the tool holder body 4. It can be held and fixed to the tool holder body 4 while being held at (an angular position where the second flat surface portion 56 is substantially perpendicular to the axis of the second holding bolt 60).

締付け機構32は、締付けボルト66から構成されている。締付けボルト66は軸部68を有し、この軸部68の一端部には、雄ねじ部が設けられている。また、工具ホルダ本体4の雌ねじ部34には中間ねじ部材72が螺着され、この中間ねじ部材72に雌ねじ孔が設けられている。締付けボルト66は、その軸部68がカバー部材16の挿通孔20を通して内方に延び、その雄ねじ部70が中間ねじ部材72の雌ねじ部に螺合される。従って、締付けボルト66の頭部74を締付け方向に回動して締め付けると、この締付けボルト66に対して工具ホルダ本体4がカバー部材16に近接する方向(図1及び図2において右方)に相対的に移動し、図1及び図2に示すように、大径部21の基部端面が取付ホルダ2の端面(図1及び図2における左端面)に圧接されて押圧固定される。   The tightening mechanism 32 includes a tightening bolt 66. The tightening bolt 66 has a shaft portion 68, and a male screw portion is provided at one end portion of the shaft portion 68. An intermediate screw member 72 is screwed into the female screw portion 34 of the tool holder body 4, and a female screw hole is provided in the intermediate screw member 72. The shaft portion 68 of the tightening bolt 66 extends inward through the insertion hole 20 of the cover member 16, and the male screw portion 70 is screwed into the female screw portion of the intermediate screw member 72. Accordingly, when the head 74 of the tightening bolt 66 is rotated and tightened in the tightening direction, the tool holder body 4 is in the direction close to the cover member 16 with respect to the tightening bolt 66 (rightward in FIGS. 1 and 2). As shown in FIGS. 1 and 2, the base end face of the large diameter portion 21 is pressed against and fixed to the end face of the mounting holder 2 (the left end face in FIGS. 1 and 2).

上述した工具保持装置への加工工具50の取付けは、例えば、次のようにして行うことができる。まず、加工に用いる加工工具50を工具ホルダ本体4に着脱可能に取り付ける。即ち、コレットホルダ6及びブッシュ部材62が装着された工具ホルダ本体4の工具収容孔28に、コレット36及びブッシュ部材62を通して加工工具50の他端側を所定位置まで挿入する。そして、第2保持ボルト60を締め付けて工具ホルダ本体4に対して加工工具50を所定角度位置に位置付け、その後、ナット部材38を締め付け、コレット36を介して加工工具50を工具ホルダ本体4に固定する。   The machining tool 50 can be attached to the tool holding device described above, for example, as follows. First, the processing tool 50 used for processing is detachably attached to the tool holder body 4. That is, the other end side of the processing tool 50 is inserted to a predetermined position through the collet 36 and the bush member 62 into the tool receiving hole 28 of the tool holder main body 4 to which the collet holder 6 and the bush member 62 are mounted. Then, the second holding bolt 60 is tightened to position the processing tool 50 at a predetermined angular position with respect to the tool holder main body 4, and then the nut member 38 is tightened to fix the processing tool 50 to the tool holder main body 4 via the collet 36. To do.

次いで、加工工具50が装着された工具ホルダ本体4を取付ホルダ2に取り付ける。即ち、工具ホルダ本体4の他端側を取付ホルダ2の取付収容孔10に挿入し、締付けボルト66の雄ねじ部を工具ホルダ本体4の雌ねじ孔34に螺着された中間ねじ部材72の雌ねじ孔に螺合する。そして、締付けボルト66を締め付けるとともに、取付ホルダ2に螺合された第1保持ボルト24を締め付け、工具ホルダ本体4の大径部21の基部端面を取付ホルダ2の端面に押圧固定するとともに、工具ホルダ本体4の外周面を取付ホルダ2の取付収容孔10に押圧固定する。   Next, the tool holder main body 4 to which the processing tool 50 is attached is attached to the attachment holder 2. That is, the other end side of the tool holder main body 4 is inserted into the mounting receiving hole 10 of the mounting holder 2, and the female screw hole of the intermediate screw member 72 in which the male screw portion of the tightening bolt 66 is screwed into the female screw hole 34 of the tool holder main body 4. Threaded onto. The tightening bolt 66 is tightened, the first holding bolt 24 screwed into the mounting holder 2 is tightened, the base end surface of the large diameter portion 21 of the tool holder body 4 is pressed and fixed to the end surface of the mounting holder 2, and the tool The outer peripheral surface of the holder main body 4 is pressed and fixed to the mounting accommodation hole 10 of the mounting holder 2.

このようにして加工工具50を取付ホルダ2に取り付けると、工具ホルダ本体4が締付けボルト66及び第1保持ボルト24により取付ホルダ2に固定されるので、この工具ホルダ本体4を取付ホルダ2に確実に固定することができる。また、この取付状態においては、工具ホルダ本体4の第1平坦面部22及び第1保持ボルト24の作用によって、工具ホルダ本体4が取付ホルダ2に対して所定角度位置に保持され、また加工工具50の第2平坦面部56及び第2保持ボルト60の作用によって、加工工具50が工具ホルダ本体4に対して所定角度位置に保持され、従って、取付ホルダ2に対して加工工具50を所定角度位置に保持することができる。加えて、加工工具50はコレット36によって保持されるので、バイト部54に近い部分を保持することができ、これによって、加工時に発生する加工工具50の振動、所謂加工時のビビリを抑えることができる。   When the machining tool 50 is attached to the attachment holder 2 in this way, the tool holder main body 4 is fixed to the attachment holder 2 by the tightening bolt 66 and the first holding bolt 24, so that the tool holder main body 4 is securely attached to the attachment holder 2. Can be fixed to. Further, in this mounted state, the tool holder body 4 is held at a predetermined angular position with respect to the mounting holder 2 by the action of the first flat surface portion 22 and the first holding bolt 24 of the tool holder body 4, and the processing tool 50. The machining tool 50 is held at a predetermined angular position with respect to the tool holder body 4 by the action of the second flat surface portion 56 and the second holding bolt 60, and accordingly, the machining tool 50 is held at a predetermined angular position with respect to the mounting holder 2. Can be held. In addition, since the processing tool 50 is held by the collet 36, it is possible to hold a portion close to the bite portion 54, thereby suppressing vibration of the processing tool 50 generated during processing, so-called chatter during processing. it can.

上述した構成の工具保持装置の効果を確認するために、次の通りの加工実験を行い、加工時の振動(所謂、加工時のビビリ)の発生を調べた。実施例として、図1〜図3に示す形態の工具保持装置を用い、NC旋盤の工具テーブルにこの工具保持装置を取り付け、取付ホルダからの加工工具の突出量を16mm、24mm、32mm、40mm、48mm及び56mmに設定し、各突出量の場合における加工工具の振動の発生状態を調べた。   In order to confirm the effect of the tool holding device having the above-described configuration, the following machining experiment was performed, and the occurrence of vibration during machining (so-called chatter during machining) was examined. As an example, using the tool holding device of the form shown in FIGS. 1 to 3, this tool holding device is attached to the tool table of the NC lathe, and the protruding amount of the machining tool from the mounting holder is 16 mm, 24 mm, 32 mm, 40 mm, It set to 48 mm and 56 mm, and the generation | occurrence | production state of the vibration of the processing tool in the case of each protrusion amount was investigated.

被加工物(被削材)として炭素鋼(S45C)を用い、加工部分に水溶性切削油を供給しながら加工を行った。このときの加工条件は、切削速度100〜150m/min、被加工物の回転数2270〜3400rpm、送り量0.05〜0.15mm/rev、切込み量0.1〜0.8mmであった。   Carbon steel (S45C) was used as a workpiece (work material), and processing was performed while water-soluble cutting oil was supplied to the processed portion. The machining conditions at this time were a cutting speed of 100 to 150 m / min, a workpiece rotation speed of 2270 to 3400 rpm, a feed amount of 0.05 to 0.15 mm / rev, and a cutting amount of 0.1 to 0.8 mm.

比較のために、工具保持装置として従来のブッシュ部材を用いた形態のものを使用し、この従来の工具保持装置を実施例で使用したNC旋盤の工具テーブルに取り付け、加工工具の突出量を実施例と同様に設定したときの加工工具の振動の発生状態を調べた。被加工物としては実施例と同じものを用い、その加工条件も実施例と同一であった。   For comparison, a tool holding device having a form using a conventional bush member is used, and this conventional tool holding device is attached to the tool table of the NC lathe used in the embodiment, and the protrusion amount of the machining tool is implemented. The vibration generation state of the machining tool when set in the same manner as in the example was examined. The same workpiece as in the example was used as the workpiece, and the processing conditions were also the same as in the example.

実施例及び比較例の実験結果は、図4に示す通りであった。図4から明らかなように、比較例では、加工工具の突出量が48mm以上になると、加工時にビビリ音が発生し、また加工後に加工表面を調べるとビビリ模様がはっきりと生じており、被加工物を安定して加工することができなかった。これに対して、実施例では、加工工具の突出量が56mmであっても加工時にビビリ音の発生はなく、また加工後に加工表面を調べてもビビリ模様が少し生じている程度で、実用レベル範囲内であり、被加工物を安定して加工することができた。   The experimental results of the examples and comparative examples are as shown in FIG. As is clear from FIG. 4, in the comparative example, when the protrusion amount of the processing tool is 48 mm or more, chatter noise is generated during processing, and when the processing surface is examined after processing, a chatter pattern is clearly generated. The object could not be processed stably. On the other hand, in the embodiment, even when the protrusion amount of the processing tool is 56 mm, no chatter noise is generated during processing, and even if the processing surface is examined after processing, a slight chatter pattern is generated, which is a practical level. It was within the range, and the workpiece could be processed stably.

この工具保持装置は、NC旋盤などの加工装置の工具テーブルに取り付けて使用され、被加工物にボーリング加工などを施す際に、ボーリング加工用工具などを取り付けるのに用いられる。この工具保持装置を用いることにより、取付ホルダに対して加工工具を所定角度位置に取り付けることができ、工具の取付け、交換などに要する時間を短縮させて加工効率を高めることができる。また、加工時の振動の発生を抑えることができ、被加工物を高精度に加工することができる。   This tool holding device is used by being attached to a tool table of a processing device such as an NC lathe, and is used for attaching a boring tool or the like when boring or the like is performed on a workpiece. By using this tool holding device, the machining tool can be attached to the attachment holder at a predetermined angular position, and the time required for the attachment and replacement of the tool can be shortened to improve the machining efficiency. Moreover, generation | occurrence | production of the vibration at the time of a process can be suppressed, and a to-be-processed object can be processed with high precision.

最良の実施形態の工具保持装置を示す断面図である。It is sectional drawing which shows the tool holding apparatus of the best embodiment. 図1の工具保持装置の工具ホルダ本体の内部をも断面で示す断面図である。It is sectional drawing which shows also the inside of the tool holder main body of the tool holding apparatus of FIG. 図1の工具保持装置を分解して示す分解斜視図である。It is a disassembled perspective view which decomposes | disassembles and shows the tool holding apparatus of FIG. 加工工具の突出量と加工時の振動の発生状態との関係を示す図である。It is a figure which shows the relationship between the protrusion amount of a processing tool, and the generation | occurrence | production state of the vibration at the time of a process.

符号の説明Explanation of symbols

2 取付ホルダ
4 工具ホルダ本体
6 コレットホルダ
10 取付収容孔
22 第1平坦面部
24 第1保持ボルト
28 工具収容孔
32 締付け機構
36 コレット
38 ナット部材
50 加工工具
52 工具本体部
56 第2平坦面部
60 第2保持ボルト
62 ブッシュ部材
66 締付けボルト
72 中間ねじ部材
DESCRIPTION OF SYMBOLS 2 Mounting holder 4 Tool holder main body 6 Collet holder 10 Mounting accommodation hole 22 1st flat surface part 24 1st holding bolt 28 Tool accommodation hole 32 Tightening mechanism 36 Collet 38 Nut member 50 Processing tool 52 Tool main body part 56 2nd flat surface part 60 1st 2 Holding bolt 62 Bush member 66 Tightening bolt 72 Intermediate screw member

Claims (2)

取付ホルダと、前記取付ホルダに着脱可能に取り付けられる工具ホルダ本体と、前記工具ホルダ本体に取り付けられたコレットホルダと、前記コレットホルダに着脱自在に取り付けられる加工工具と、を備え、
前記取付ホルダ及び前記工具ホルダ本体には、前記取付ホルダに対して前記工具ホルダ本体を所定角度位置に保持するための第1角度位置保持手段が設けられ、前記工具ホルダ本体と前記加工工具には、前記工具ホルダ本体に対して前記加工工具を所定角度位置に保持するための第2角度位置保持手段が設けられていることを特徴とする工具保持装置。
An attachment holder, a tool holder body detachably attached to the attachment holder, a collet holder attached to the tool holder body, and a machining tool detachably attached to the collet holder,
The mounting holder and the tool holder main body are provided with a first angular position holding means for holding the tool holder main body at a predetermined angular position with respect to the mounting holder, and the tool holder main body and the processing tool include A tool holding device is provided with second angular position holding means for holding the machining tool at a predetermined angular position with respect to the tool holder main body.
前記取付ホルダには、前記工具ホルダ本体を前記加工工具の軸線方向に締め付けるための締付け機構が設けられ、前記締付け機構は前記工具ホルダ本体に螺合された締付けボルトから構成されていることを特徴とする請求項1に記載の工具保持装置。   The mounting holder is provided with a tightening mechanism for tightening the tool holder main body in the axial direction of the processing tool, and the tightening mechanism is constituted by a tightening bolt screwed into the tool holder main body. The tool holding device according to claim 1.
JP2003346471A 2003-10-06 2003-10-06 Tool holding device Pending JP2005111587A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008000822A (en) * 2006-06-20 2008-01-10 Murata Mach Ltd Tool fixing structure and tool fixing method
JP2015196210A (en) * 2014-03-31 2015-11-09 シチズンホールディングス株式会社 Tool holder and machine tool
JP2016195940A (en) * 2016-09-01 2016-11-24 キヤノン株式会社 Subject information acquisition device and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008000822A (en) * 2006-06-20 2008-01-10 Murata Mach Ltd Tool fixing structure and tool fixing method
JP2015196210A (en) * 2014-03-31 2015-11-09 シチズンホールディングス株式会社 Tool holder and machine tool
JP2016195940A (en) * 2016-09-01 2016-11-24 キヤノン株式会社 Subject information acquisition device and control method thereof

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