JPH07266109A - Tool mounting structure - Google Patents
Tool mounting structureInfo
- Publication number
- JPH07266109A JPH07266109A JP8259194A JP8259194A JPH07266109A JP H07266109 A JPH07266109 A JP H07266109A JP 8259194 A JP8259194 A JP 8259194A JP 8259194 A JP8259194 A JP 8259194A JP H07266109 A JPH07266109 A JP H07266109A
- Authority
- JP
- Japan
- Prior art keywords
- tool
- coolant
- peripheral surface
- spindle
- holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Auxiliary Devices For Machine Tools (AREA)
- Gripping On Spindles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、工具を回転駆動する為
の主軸に対して工具を取付ける部分の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a portion for mounting a tool on a main shaft for rotationally driving the tool.
【０００２】[0002]
【従来の技術】この種の取付構造に係る技術事項は、例
えば実開平２−３１６０９号公報に開示されている。そ
の公報の記載内容は、次の「公知技術欄」に記載の通り
である。尚上記公報における第１図〜第１４図は、添付
図面において本願の実施例を示す図１〜図４と区別する
為に、図５（Ａ）、（Ｂ）、図６〜図１７として順に示
した。2. Description of the Related Art Technical matters relating to this type of mounting structure are disclosed in, for example, Japanese Utility Model Laid-Open No. 2-31609. The contents of the publication are as described in the following "Public technology column". It should be noted that FIGS. 1 to 14 in the above publication are sequentially referred to as FIGS. 5A and 5B and FIGS. 6 to 17 in order to distinguish them from FIGS. 1 to 4 showing an embodiment of the present application in the accompanying drawings. Indicated.
【０００３】公知技術欄 『第１図乃至第６図において、１は工作機械における主
軸、２は主軸１に対して刃具や被加工材等の被保持物３
を装着する為の保持具を示す。次に第１、２、３図に表
われる主軸１において、４は先端に開口部4'を有する中
空部で、主軸１の一端側1'において軸線方向へ長い穴に
よって形成されている。５は受止面、６は先端近くの外
周に突設されている係止部で、第３図に示すように主軸
１の外周に環状溝７を形成することにより、その環状溝
７と受止面５との間の主軸１の外周に形成されている。
８は爪通過溝で、主軸の一端側1'の周囲に１つ又は周囲
を等分割する２以上の位置に夫々形成されている。９は
先端に形成されている係合凹部で、上記爪通過溝８と同
じ所に形成してあるが、爪通過溝８と異なる場所に１つ
又は複数を設けても良い。次に、上記保持具２におい
て、11は本体を示し、この本体11における一端側の12は
挿入部、他端側の13は被保持物３の装着部であって周知
例の内の一例を示す。14は本体11における挿入部12の元
部12' に隣接する位置に周設した当接部、15は当接部に
固着してある係合部材、16は本体11の外周に本体11の軸
線方向に向けての進退が自在でかつ周方向に向けての移
動を規制した状態に具備させてある掛止部材、17は本体
11の装着部13に被保持物３を装着する場合に用いられる
周知の締具の一例を示す。18, 19は本体11に被保持物３
の相対回転を阻止するように付設してある回転止手段
と、本体11に被保持物３の挿入位置を位置決めするよう
に付設してある位置決め手段の周知例の内の夫々一例を
示すものである。次に、上記挿入部12における20は導入
部で、中空部４に挿入し易いように中空部４の孔径より
小さい外径にしてある。21は嵌合部で、中空部４にきっ
ちり挿入できるように中空部４の孔径に対応する外径に
してある。次に上記装着部13における23はコレット嵌合
孔、24はねじ部である。次に半径方向に突設状になって
いる当接部14における25は当面で、挿入部12を中空部４
に挿入した第７図の状態で主軸１の受止面５への当接を
可能に形成されている。次に係合部材15において、27は
当接部14の外周に位置させた基材で、本体11の軸心方向
に向けて僅かな進退を可能にしてある。第４図に示され
る28は規制孔で、第１２〜１４図に明示されているよう
に本体11の軸線方向へ長い長孔にしてある。30は基材27
の一端に設けてある環状の係合片、32は上記基材27の他
端部に一体に設けられている持出片、34は第１２図に示
すように持出片32の先端部から挿入部12の外周面に向け
て突出されている引止爪で、本体11の挿入部12を中空部
４に挿入するとき、主軸１の爪通過溝８を通過するよう
に形成されている。35は上記引止爪34の内側にある係合
面で、第１４図に示すように当面25を主軸１の受止面５
に当接させた状態で係止部６の係止面6aに係止させ得る
ように形成されている。第１３図に示される36は案内面
で、主軸１の係止面6aの縁部6a' に斜めに対向するよう
に形成されている。次に第４図に示される29は当接部14
の外周に植設されている規制ピンで、第１２〜１４図に
示すように上記規制孔28内に位置させることによって、
本体11に対する係合部材15の進退方向の動き幅を極小に
規制するものであり、これによって係合部材15は本体11
に対して実質的に固着されることになる。31は環状の係
合片30と当接部14との間に介装されている環状のゴム製
の弾性体で（皿ばね等によって構成されていてもよ
い）、基材27を本体11の抜き取り方向（第１図の右方
向）へ付勢している。次に上記掛止部材16において、39
は本体11の外周に軸線方向へ移動自在に遊嵌されている
操作部で、一部にバネ座40を持っている。43は操作部39
から挿入部12の挿入方向と平行な方向に突設してある回
転止爪である。該回転止爪43の元部は第４図に示すよう
に本体11の当接部14に形成した切欠溝45内に位置させて
あって、本体11の周方向への移動が阻止されている。上
記回転止爪43は上記引止爪34に対して周方向へ９０度離
して設けてあるが、この離す角度の大きさは９０度より
大きくても小さくても良い。41, 42は上記掛止部材16に
関連する部材であって、41は本体11の外周に止着されて
いるスプリング用の止め輪、42はバネ座40と止め輪41と
の間に圧縮介装されているスプリングで、回転止爪43を
挿入部12の挿入方向へ付勢する為のものである。尚上記
回転止爪43の元部は、第５図に示される如く前記係合部
材15における係合片30に形成された係合溝44内にも位置
させてあって、本体11に対する係合部材15の回転が阻止
されている。上記締具17は前記公開公報によって開示さ
れたものと同じ構成のものを例示したが、これにおい
て、46はコレット、47は回転リング、48はスチールボー
ル、49はねじ部24に螺合されている締付キャップを示
す。なお締具は、他の周知構造のものでもよい。上記回
転止手段18において、50はキー溝、51はキー、52は係合
凹溝52ａを有する回転止体で、キー51によって回り止め
されている。上記位置決め手段19において、53は雌ねじ
部、54は雌ねじ部53に螺合されている調整ねじ体で、上
記回転止体52を受止めている。上記構成のものの使用を
順を追って説明する。被保持物３を主軸１に取付けるに
当っては、先ず保持具２における本体11の装着部13に被
保持物３を取付け、締具17で締着する。然る後、第１、
２図の状態から保持具２の挿入部12を主軸１の中空部４
に挿入し、第７図の矢印XII部分の拡大図である第１２
図に示すように係合部材15の引止爪34を爪通過溝８に挿
通させる。そして第１２図に示すように当接部14の当面
25を主軸１の受止面５に当接させる。このように当面25
を受止面５に当接させると、第８図に示すように掛止部
材16の回転止爪43が受止面５に当接してスプリング42の
付勢力に抗して押し戻される。また上記のように当面25
を受止面５に当接させると、第１３図に示すように引止
爪34の案内面36の縁部が主軸１における係止面6aの縁部
6a' に対向する。次に、保持具２を主軸１に対して回動
させると、引止爪34の案内面36が第１３図の矢印ａに示
す如く移動して主軸１の係止面6aの縁部6a' に当接し、
更に回動させることにより矢印ｂで示す如く引止爪34が
環状溝７の内に案内され、これにより係合片30が第１４
図に示すように弾性体31を圧縮させて基材27が主軸側へ
移動する。この結果、引止爪34の係合面35が第１３図の
仮想線及び第１４図に示すように係止部６の係止面6aに
係合し、当接部14の当面25は主軸１の受止面５に確実に
圧接される。また上記のように保持具２を主軸１に対し
て回動させると、その回動過程で掛止部材16の回転止爪
43が第１０図に示すように主軸１の係合凹部９にスプリ
ング42の弾力によって嵌合する（第９図、第１０図に示
すように操作部39は主軸側に移動する）。その結果主軸
１に対する保持具２の回動が阻止され、保持具２は主軸
１に対して一体的になる。次に、上記のようにして保持
具２を主軸１に対して装着した後は、周知の如く機械加
工作業、即ち被保持物３が刃物の場合には主軸１の回転
により刃物を回転させて被加工物を加工する。その場
合、保持具２の当面25が主軸１の受止面５に圧接されて
両者間の隙間はなくなっており、しかも主軸１に対する
保持具２の相対回動が阻止されているので、被保持物３
を主軸１に完全に一体化できて被保持物３による加工精
度を高くできる。次に、保持具２を主軸１から取外す場
合には、先ず掛止部材16の操作部39をスプリング42に抗
して第９図、第１０図の右方へ移動させ、回転止爪43を
係合凹部９から抜け出させる。その状態で本体11を左右
任意方向へ回動させて引止爪34を主軸１の係止面6aに対
向する位置から外す（爪通過溝８に対向させる）。その
後は挿入部12を主軸１の中空部４から軽く引き抜く。』Known Technology Section [In FIGS. 1 to 6, 1 is a spindle in a machine tool, 2 is a spindle, and an object 3 to be held such as a cutting tool or a work material is attached to the spindle 1.
The holding tool for mounting is shown. Next, in the main shaft 1 shown in FIGS. 1, 2, and 3, reference numeral 4 denotes a hollow portion having an opening 4 ′ at its tip, which is formed by a hole elongated in the axial direction at one end side 1 ′ of the main shaft 1. Reference numeral 5 is a receiving surface, and 6 is a locking portion protrudingly provided on the outer circumference near the tip. By forming an annular groove 7 on the outer circumference of the main shaft 1 as shown in FIG. It is formed on the outer circumference of the main shaft 1 between the stop surface 5.
Denoted at 8 is a claw passage groove, which is formed around the one end side 1 ′ of the main shaft, or is formed at two or more positions that equally divide the circumference. Reference numeral 9 denotes an engaging recess formed at the tip, which is formed at the same place as the claw passing groove 8, but one or more may be provided at a different place from the claw passing groove 8. Next, in the holder 2, 11 indicates a main body, 12 on one end side of the main body 11 is an insertion portion, and 13 on the other end side is a mounting portion of the held object 3 Show. Reference numeral 14 denotes an abutting portion provided around the base portion 12 ′ of the insertion portion 12 in the main body 11, 15 is an engaging member fixed to the abutting portion, 16 is an outer circumference of the main body 11, and an axis line of the main body 11. 17 is a main body which is provided with a state in which it can be freely moved back and forth in a direction and its movement in a circumferential direction is restricted.
An example of a known fastener used when the held object 3 is mounted on the mounting portion 13 of 11 is shown. 18 and 19 are objects to be held 3 on the main body 11.
The following are examples of well-known examples of the rotation stopping means attached so as to prevent relative rotation of the object and the positioning means attached for positioning the insertion position of the held object 3 on the main body 11. is there. Next, 20 in the insertion portion 12 is an introduction portion, and has an outer diameter smaller than the hole diameter of the hollow portion 4 so that it can be easily inserted into the hollow portion 4. A fitting portion 21 has an outer diameter corresponding to the hole diameter of the hollow portion 4 so that it can be inserted into the hollow portion 4 exactly. Next, 23 in the mounting portion 13 is a collet fitting hole, and 24 is a screw portion. Next, 25 of the abutting portion 14 which is formed in a protruding shape in the radial direction is the immediate surface, and the insertion portion 12 is inserted into the hollow portion 4
It is formed so that the main shaft 1 can come into contact with the receiving surface 5 in the state shown in FIG. Next, in the engaging member 15, 27 is a base material located on the outer periphery of the contact portion 14, which allows a slight advance / retreat in the axial direction of the main body 11. Reference numeral 28 shown in FIG. 4 is a restriction hole, which is a long hole elongated in the axial direction of the main body 11 as clearly shown in FIGS. 30 is the base material 27
, An annular engaging piece provided at one end of the take-out piece, 32 a take-out piece integrally provided at the other end of the base material 27, and 34 as shown in FIG. A detent pawl that projects toward the outer peripheral surface of the insertion portion 12 is formed so as to pass through the pawl passage groove 8 of the main shaft 1 when the insertion portion 12 of the main body 11 is inserted into the hollow portion 4. Reference numeral 35 denotes an engagement surface inside the detent claw 34, and as shown in FIG.
It is formed so that it can be locked to the locking surface 6a of the locking portion 6 while being brought into contact with. Reference numeral 36 shown in FIG. 13 is a guide surface, which is formed so as to obliquely face the edge portion 6a ′ of the engaging surface 6a of the main shaft 1. Next, 29 shown in FIG.
With a restriction pin that is planted on the outer periphery of, by locating it in the restriction hole 28 as shown in FIGS.
The movement width of the engaging member 15 in the advancing / retreating direction with respect to the main body 11 is restricted to a minimum.
Will be substantially fixed to. Reference numeral 31 denotes an annular rubber elastic body interposed between the annular engaging piece 30 and the abutting portion 14 (which may be constituted by a disc spring or the like), and the base material 27 is attached to the main body 11 of the main body 11. It is biased in the removal direction (rightward in Fig. 1). Next, in the hooking member 16, 39
Is an operating portion that is loosely fitted to the outer periphery of the main body 11 so as to be movable in the axial direction, and has a spring seat 40 in part. 43 is the operation unit 39
Is a rotation stopping pawl projecting in a direction parallel to the insertion direction of the insertion portion 12. The base of the rotation stopping claw 43 is located in a notch groove 45 formed in the contact portion 14 of the main body 11 as shown in FIG. 4, and the movement of the main body 11 in the circumferential direction is prevented. . The rotation stopping claw 43 is provided at a distance of 90 degrees in the circumferential direction with respect to the detent claw 34, but the angle of the separation may be larger or smaller than 90 degrees. Reference numerals 41 and 42 are members related to the hook member 16, 41 is a retaining ring for a spring fixed to the outer periphery of the main body 11, and 42 is a compression member between the spring seat 40 and the retaining ring 41. The mounted spring serves to urge the rotation stopping claw 43 in the insertion direction of the insertion portion 12. The base portion of the rotation stopping claw 43 is also located in the engaging groove 44 formed in the engaging piece 30 of the engaging member 15 as shown in FIG. The rotation of the member 15 is prevented. The fastener 17 has the same structure as that disclosed by the above publication, but in this, 46 is a collet, 47 is a rotating ring, 48 is a steel ball, and 49 is screwed to the screw portion 24. Shows the tightening cap. The fastener may have another known structure. In the rotation stopping means 18, 50 is a key groove, 51 is a key, and 52 is a rotation stopping body having an engaging groove 52a, which is prevented from rotating by the key 51. In the positioning means 19, 53 is a female screw portion, 54 is an adjusting screw body screwed to the female screw portion 53, and receives the rotation stopping body 52. The use of the above configuration will be described step by step. When attaching the held object 3 to the main shaft 1, first, the held object 3 is attached to the mounting portion 13 of the main body 11 of the holding tool 2 and is fastened with the fasteners 17. After that, the first,
From the state shown in FIG. 2, insert the insertion part 12 of the holder 2 into the hollow part 4 of the spindle 1.
12 is an enlarged view of an arrow XII portion in FIG.
As shown in the figure, the detent claw 34 of the engaging member 15 is inserted into the claw passage groove 8. Then, as shown in FIG.
25 is brought into contact with the receiving surface 5 of the spindle 1. Like this for the time being 25
When is contacted with the receiving surface 5, the rotation stopping claw 43 of the latch member 16 contacts the receiving surface 5 and is pushed back against the urging force of the spring 42 as shown in FIG. In addition, as mentioned above, 25
13 is brought into contact with the receiving surface 5, the edge of the guide surface 36 of the detent claw 34 becomes the edge of the engaging surface 6a of the spindle 1 as shown in FIG.
Face 6a '. Next, when the holder 2 is rotated with respect to the main shaft 1, the guide surface 36 of the detent claw 34 moves as shown by an arrow a in FIG. 13, and the edge portion 6a ′ of the locking surface 6a of the main shaft 1 is moved. Abut
Further rotation causes the detent claw 34 to be guided into the annular groove 7 as shown by the arrow b, whereby the engagement piece 30 is moved to the 14th position.
As shown in the figure, the elastic body 31 is compressed and the base material 27 moves to the main shaft side. As a result, the engagement surface 35 of the detent claw 34 engages with the engagement surface 6a of the engagement portion 6 as shown in phantom lines in FIG. 13 and FIG. It is reliably pressed against the receiving surface 5 of 1. When the holder 2 is rotated with respect to the main shaft 1 as described above, the rotation stopping claws of the latching member 16 are rotated during the rotation.
43 is fitted into the engaging recess 9 of the spindle 1 by the elastic force of the spring 42 as shown in FIG. 10 (the operating portion 39 moves to the spindle side as shown in FIGS. 9 and 10). As a result, the rotation of the holder 2 with respect to the main shaft 1 is blocked, and the holder 2 becomes integral with the main shaft 1. Next, after the holder 2 is attached to the main spindle 1 as described above, as is well known, a machining operation is performed, that is, when the held object 3 is a blade, the main spindle 1 is rotated to rotate the blade. Process the work piece. In this case, the holding surface 2 of the holder 2 is pressed against the receiving surface 5 of the main shaft 1 to eliminate the gap between the two, and the relative rotation of the holder 2 with respect to the main shaft 1 is prevented, so that the held object is held. Thing 3
Can be completely integrated with the spindle 1, and the processing accuracy of the held object 3 can be increased. Next, when detaching the holder 2 from the main shaft 1, first, the operating portion 39 of the latch member 16 is moved to the right in FIGS. 9 and 10 against the spring 42, and the rotation stopper claw 43 is moved. It is pulled out from the engaging recess 9. In this state, the main body 11 is rotated in the left-right direction to remove the detent claw 34 from the position facing the locking surface 6a of the main shaft 1 (facing the claw passage groove 8). After that, the insertion portion 12 is lightly pulled out from the hollow portion 4 of the main shaft 1. ]
【０００４】上記のような工具取付構造では、工具装着
状態において主軸１を前進させながら工具３によって被
加工物を切削する場合、保持具２における当面25が主軸
１における受止面５に当接している為、主軸１の前進寸
法と工具３による被加工物の切削深さとが正確に一致
し、その結果、被加工物を寸法精度高く切削できる特長
がある。In the tool mounting structure as described above, when the work piece is cut by the tool 3 while the spindle 1 is advanced while the tool is mounted, the abutment surface 25 of the holder 2 contacts the receiving surface 5 of the spindle 1. Therefore, the forward dimension of the spindle 1 and the cutting depth of the work piece by the tool 3 are accurately matched, and as a result, the work piece can be cut with high dimensional accuracy.
【０００５】ところで上記工具３により被加工物を切削
する場合、工具の磨耗を減少させる為に、主軸１から工
具３に向けてクーラントを供給できるようにすることが
望まれる。そこで出願人会社においては図１８に示す構
成を案出した。即ち、主軸１には図示外のクーラントの
供給源に接続している給油路60を設け、その給油路60を
通して供給されるクーラントを、主軸１の中空部４の底
部と該中空部に差し込まれた保持具２の挿入部12との間
にできる空間61（挿入部の長さにばらつきがあっても、
受止面５に対し当面25を確実に当接させ得るよう中空部
４の深さは挿入部12の長さよりも大きく設計してある
為、該空間61ができる）を経て、更に、調節ねじ体54及
び回転止体52に設けた送油路62，63を通して工具３の油
孔64に送り込む構成を案出した。When cutting the workpiece with the tool 3, it is desirable to be able to supply the coolant from the spindle 1 toward the tool 3 in order to reduce the wear of the tool. Therefore, the applicant company has devised the configuration shown in FIG. That is, the main shaft 1 is provided with an oil supply passage 60 connected to a coolant supply source (not shown), and the coolant supplied through the oil supply passage 60 is inserted into the bottom portion of the hollow portion 4 of the main spindle 1 and the hollow portion. A space 61 formed between the holder 2 and the insertion portion 12 (even if the length of the insertion portion varies,
Since the depth of the hollow portion 4 is designed to be larger than the length of the insertion portion 12 so that the contact surface 25 can surely come into contact with the receiving surface 5, the space 61 is formed, and then the adjustment screw A configuration has been devised in which the oil is fed into the oil hole 64 of the tool 3 through the oil feeding passages 62 and 63 provided in the body 54 and the rotation stopping body 52.
【０００６】[0006]
【発明が解決しようとする課題】しかし上記図１８の構
成では、空間61に入り込むクーラントの圧力が挿入部12
において中空部４の底部の側を向く面65の全域に加わ
り、その力が保持具２を主軸１から押し出そうとする力
として保持具２に加わる。この為、保持具においては上
記受止面５に対する当面25の当て付け状態が緩んで、本
体11が主軸１に対して矢印66方向に前進し、受止面５と
当面25との間に隙間67があいてしまう。その結果、切削
加工例えば穿孔の場合、主軸１を正確な寸法Ｌ０で前進
させても工具３の前進寸法Ｌ１にはばらつきが生じ、被
加工物の穿孔深さの寸法精度を低下させる問題点があっ
た。However, in the structure shown in FIG. 18, the pressure of the coolant entering the space 61 causes the insertion portion 12 to enter.
In, the whole area of the surface 65 of the hollow portion 4 facing the bottom side is applied, and the force is applied to the holder 2 as a force to push the holder 2 out of the main shaft 1. Therefore, in the holder, the contact state of the abutting surface 25 with respect to the receiving surface 5 is loosened, the main body 11 advances in the direction of the arrow 66 with respect to the main shaft 1, and a gap is formed between the receiving surface 5 and the abutting surface 25. 67 hits. As a result, in the case of cutting, for example, drilling, even if the spindle 1 is advanced with an accurate dimension L0, the advance dimension L1 of the tool 3 varies, and there is a problem that the dimensional accuracy of the depth of the workpiece is reduced. there were.
【０００７】本願発明の工具取付構造は上記従来技術の
問題点（技術的課題）を解決する為に提供するものであ
る。第１の目的は、主軸に保持具を介して装着した工具
によって被加工物に切削を行う場合、主軸の前進寸法と
工具による被加工物の切削深さとを正確に一致させられ
る工具取付構造を提供することである。第２の目的は、
主軸から工具に向けてクーラントの供給を行うことので
きる工具取付構造を提供することである。第３の目的
は、主軸から工具に向けてクーラントの供給を行うよう
にしたが為にクーラントの供給圧力が保持具に加わるも
のであっても、そのクーラントの圧力が主軸から工具保
持具を押し出す力を生じないようにすることができて、
上記主軸の前進寸法と工具による切削深さとが正確に一
致する状態を保つことのできる工具取付構造を提供する
ことである。他の目的及び利点は図面及びそれに関連し
た以下の説明により容易に明らかになるであろう。The tool mounting structure of the present invention is provided in order to solve the above-mentioned problems (technical problems) of the prior art. The first purpose is to provide a tool mounting structure that can accurately match the forward dimension of the spindle with the cutting depth of the workpiece by the tool when the workpiece is cut by the tool attached to the spindle via the holder. Is to provide. The second purpose is
It is to provide a tool mounting structure capable of supplying coolant from a spindle toward a tool. The third purpose is that the coolant is supplied from the spindle toward the tool. Therefore, even if the coolant supply pressure is applied to the holder, the coolant pressure pushes out the tool holder from the spindle. You can avoid the force,
It is an object of the present invention to provide a tool mounting structure capable of maintaining a state in which the forward dimension of the main shaft and the cutting depth by the tool are accurately matched. Other objects and advantages will be readily apparent from the drawings and the following description related thereto.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成する為
に、本願発明における工具取付構造は、主軸には工具保
持具における挿入部を差し込む為の中空部を主軸の端面
に開口する状態に設け、一方工具装着部を備えた工具保
持具は、その挿入部を上記主軸の中空部に差し込むと共
に、該工具保持具の外周に上記挿入部側を向く状態に設
けられた段部を上記主軸の端面に当接させた状態で上記
主軸に装着し、上記主軸に設けられ且つクーラントの供
給源に連なっている給油路から、上記保持具に設けられ
且つ上記工具装着部に装着される工具に対してクーラン
トを供給する為の送出口に連なっている通油路に対し
て、クーラントを供給するようにしてある工具取付構造
において、上記給油路から通油路へのクーラントの供給
の為の構造は、上記挿入部の外周面、又は、挿入部の端
面に設けた凹部の内周面に、上記通油路に連通する受入
口を設け、一方上記主軸においては、該主軸に上記工具
保持具を装着した状態において上記挿入部の外周面と対
向する周壁の内周面、又は、上記主軸に、上記挿入部に
設けた凹部の内周面と対向する状態に備えさせた部材の
外周面に、上記受入口にクーラントを供給するための供
給口であって上記給油路に連通している供給口を備えさ
せたものである。In order to achieve the above object, in the tool mounting structure of the present invention, the main shaft is provided with a hollow portion for inserting the insertion portion of the tool holder into the end surface of the main spindle. On the other hand, a tool holder provided with a tool mounting portion inserts the insertion portion into the hollow portion of the spindle, and at the same time, a step portion provided on the outer periphery of the tool holder in a state of facing the insertion portion side of the spindle. Attached to the main spindle in a state of abutting against the end face, from an oil supply passage provided on the main spindle and connected to a coolant supply source to a tool provided on the holder and attached to the tool attachment portion. In the tool mounting structure that supplies the coolant to the oil passage that is connected to the delivery port for supplying the coolant, the structure for supplying the coolant from the oil passage to the oil passage is , Above The outer peripheral surface of the portion, or the inner peripheral surface of the recess provided in the end surface of the insertion portion, is provided with an inlet communicating with the oil passage, while in the main spindle, a state in which the tool holder is mounted on the main spindle. In the inner peripheral surface of the peripheral wall facing the outer peripheral surface of the insertion portion, or on the outer peripheral surface of the member provided on the main shaft so as to face the inner peripheral surface of the recess provided in the insertion portion, the receiving port Is provided with a supply port for supplying a coolant, which is in communication with the oil supply passage.
【０００９】[0009]
【作用】工具取付部に工具を取付け、主軸を回動させ、
それを前進させると、取付けた工具によって被加工物の
加工を行うことができる。上記加工の場合、主軸の給油
路に供給されるクーラントは、その供給口から工具保持
具の受入口に入り、通油路通って送出口に至り、そこか
ら工具の油孔に至って、工具による被加工物の切削部の
潤滑及び冷却を行う。上記クーラントを送る場合、上記
受入口は挿入部の外周面又は凹部の内周面に設けてあ
り、その面と対向する面に上記供給口が設けてあるの
で、クーラントの圧力が工具保持具をその軸線方向に押
す力として働くことはない。[Operation] Attach the tool to the tool attachment part, rotate the main shaft,
When it is moved forward, the work piece can be processed by the attached tool. In the case of the above processing, the coolant supplied to the oil supply passage of the main shaft enters the receiving opening of the tool holder from its supply opening, reaches the sending outlet through the oil passage, reaches the oil hole of the tool, Lubricate and cool the cutting part of the work piece. When sending the coolant, the receiving port is provided on the outer peripheral surface of the insertion portion or the inner peripheral surface of the recessed portion, and the supply port is provided on the surface facing the surface, so that the pressure of the coolant causes the tool holder to move. It does not act as a pushing force in its axial direction.
【００１０】[0010]
【実施例】以下本願の実施例を示す図面について説明す
る。先ず第１の実施例を示す図１乃至図３について説明
する。尚これらの図において、機能上図５乃至図１７に
示されるものと同一又は均等の構成で説明が重複すると
考えられる部分には、図５乃至図１７と同一の符号を付
して重複する説明を省略する。図１〜３において、71は
給油プラグで、工具保持具２を回転駆動軸である主軸１
の中空部４に差し込んだ際に、保持具２と給油の為の接
続を行う部材である。該プラグ71を説明する。72は止付
部で、給油路60の内面の雌ねじに螺合させてある。73は
パッキンである。74は工具保持具２との接続部材で、外
周面は主軸１の軸線と平行な直円筒面になっている。75
は通油孔、76は供給口で、主軸１の軸線と平行となるよ
うにする為に上記外周面に開口させてある。77は外周面
に周設した通油溝である。Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 to 3 showing the first embodiment will be described. Note that in these figures, the parts which are considered to have the same or equivalent configurations as those shown in FIGS. Is omitted. In FIGS. 1 to 3, 71 is an oil supply plug, and the tool holder 2 is a main shaft 1 which is a rotary drive shaft.
It is a member for connecting to the holder 2 for refueling when it is inserted into the hollow portion 4. The plug 71 will be described. A stopper 72 is screwed into a female screw on the inner surface of the oil supply passage 60. 73 is a packing. 74 is a connecting member for the tool holder 2 and has an outer peripheral surface which is a right cylindrical surface parallel to the axis of the main shaft 1. 75
Is an oil passage, and 76 is a supply port, which is opened on the outer peripheral surface so as to be parallel to the axis of the main shaft 1. Reference numeral 77 is an oil passage groove provided around the outer peripheral surface.
【００１１】次に保持具２の本体11について説明する。
80は工具差込孔で、本体11を中空に形成することにより
構成してあり、本体における軸線方向の他端（上記挿入
部12の側とは反対側）に開口している。81は挿入部12の
先端部における内周面に周設した通油溝、82は本体11の
軸線11ａと平行な通油溝、83は本体内部における通油用
の空間である。次に84は給油プラグ71との接続を行う為
の接続部材であると共に本体11における挿入部12側の先
端を塞ぐ為の栓でもある部材で、本体11の内周面の雌ね
じ部53に螺着し、パッキン87でクーラントの漏れを防止
してある。85はプラグ嵌合用の凹部で、内周面は軸線11
ａと平行な直円筒面となっており、上記接続部材74の外
径に対応する内径に形成してある。86はクーラントの受
入孔で、その一端86ａは上記供給口76からクーラントを
受け入れる為の受入口となっており、該受入口86ａはそ
の開口面を本体11の軸線11ａと平行となるようにする為
に上記内周面に開口させてある。受入孔86の他端は通油
溝81に開口し、上記部材84を本体11に螺着した際の回動
方向の位置がどうであっても流通溝82との連通が行われ
るようにしてある。88は結合具84とプラグ71との間から
のクーラントの漏れを防止する為のパッキンを示す。次
に90は工具３の軸線方向位置を位置決するための部材で
あると共に、本体11の内部空間を工具の差し込まれる空
間80とクーラントの通る空間83とに仕切る為の部材でも
あり、軸線11ａ方向の位置設定を自在にする為に雌ねじ
部53に螺合させてある。91は上記部材90の中心位置に設
けたクーラントの送出口を示す。該送出口91にクーラン
トを送る為に連ねられる通油路は上記通油溝81，82及び
通油空間83でもって構成してある。Next, the main body 11 of the holder 2 will be described.
Reference numeral 80 denotes a tool insertion hole, which is formed by forming the main body 11 to be hollow, and is opened at the other end of the main body in the axial direction (the side opposite to the insertion portion 12 side). Reference numeral 81 is an oil passage groove provided around the inner peripheral surface at the tip of the insertion portion 12, 82 is an oil passage groove parallel to the axis 11a of the main body 11, and 83 is a space for oil passage inside the main body. Next, 84 is a connecting member for connecting to the oil supply plug 71 and also a member for closing the tip of the main body 11 on the insertion portion 12 side, and is screwed to the female screw portion 53 on the inner peripheral surface of the main body 11. And packing 87 prevents leakage of coolant. 85 is a recess for plug fitting, the inner peripheral surface is the axis 11
It is a right cylindrical surface parallel to a and has an inner diameter corresponding to the outer diameter of the connecting member 74. 86 is a coolant receiving hole, one end 86a of which serves as a receiving port for receiving the coolant from the supply port 76, and the receiving port 86a has its opening surface parallel to the axis 11a of the main body 11. Therefore, the inner peripheral surface is opened. The other end of the receiving hole 86 is opened to the oil passage 81 so that communication with the flow groove 82 is performed regardless of the position in the rotation direction when the member 84 is screwed onto the main body 11. is there. Reference numeral 88 denotes a packing for preventing the coolant from leaking between the connector 84 and the plug 71. Next, 90 is a member for locating the axial position of the tool 3 and also a member for partitioning the internal space of the main body 11 into a space 80 into which the tool is inserted and a space 83 through which the coolant flows. It is screwed into the female screw portion 53 so that the position can be freely set. Reference numeral 91 denotes a coolant delivery port provided at the center of the member 90. An oil passage connected to send the coolant to the outlet 91 is constituted by the oil grooves 81 and 82 and the oil space 83.
【００１２】上記構成の工具保持具２に工具３を取付
け、それを主軸１に装着した際のクーラントの通路の接
続を説明する。工具３を工具差込孔80に差し込んでその
後端を嵌合凹溝52ａに嵌合させ、締具17によってその工
具３を本体11に固定する。この状態で工具３の油孔64は
送出口91と連通する。上記工具保持具２を主軸１に取付
けると、プラグ71の接続部材74は凹部85に嵌合して外周
面が凹部の内周面と対向し、受入口86ａは供給口76と連
通する。この場合、主軸１と工具保持具２との回転方向
の位置関係がどうであっても、受入口86ａと供給口76と
は通油溝77を通して連通する。The connection of the coolant passages when the tool 3 is attached to the tool holder 2 having the above-mentioned structure and the tool 3 is attached to the spindle 1 will be described. The tool 3 is inserted into the tool insertion hole 80, the rear end thereof is fitted into the fitting groove 52a, and the tool 3 is fixed to the main body 11 by the fastener 17. In this state, the oil hole 64 of the tool 3 communicates with the delivery port 91. When the tool holder 2 is attached to the main shaft 1, the connecting member 74 of the plug 71 is fitted into the recess 85 so that the outer peripheral surface faces the inner peripheral surface of the recess, and the receiving port 86a communicates with the supply port 76. In this case, the receiving opening 86a and the supply opening 76 communicate with each other through the oil passage 77, regardless of the positional relationship between the spindle 1 and the tool holder 2 in the rotational direction.
【００１３】上記装着状態での被加工物の切削時におけ
るクーラントの供給を説明する。供給源から給油路60に
送られてきたクーラント（通常知られた切削油或いは
水）は、供給口76から受入口86ａに入り、通油溝81，82
を経て通油空間83に至り、送出口91から工具３の油孔64
に送り込まれる。送り込まれたクーラントは工具先端の
吹出口64ａから吹出し、被加工物と工具との接触部を潤
滑及び冷却する。The supply of the coolant at the time of cutting the work piece in the mounted state will be described. The coolant (usually known cutting oil or water) sent from the supply source to the oil supply passage 60 enters from the supply port 76 into the receiving port 86a, and the oil passage grooves 81, 82.
Through the oil passage space 83, and from the outlet 91 to the oil hole 64 of the tool 3.
Sent to. The coolant sent out blows out from the outlet 64a at the tip of the tool, and lubricates and cools the contact portion between the workpiece and the tool.
【００１４】上記の場合、上記給油路60のクーラントの
圧力例えば数Ｋｇ／ｃｍ2〜数１０Ｋｇ／ｃｍ2は受入孔
86、通油溝81，82及び空間83に加わるが、上記受入口86
ａの開口面は軸線11ａと平行なので、上記受入孔86、通
油溝81，82及び空間83において本体11の軸線方向11ａの
一方の側の面積とそれとは反対方向の側の面積とが同じ
となり、その結果、上記圧力は本体11を軸線方向に動か
す力を及ぼすことはない。従って受止面５である主軸１
の端面に対して、工具保持具２の外周に前記挿入部12側
を向く状態に設けられた段部が当接した状態即ち前記当
面25が当接した状態が維持される。それのみならず、吹
出口64ａからのクーラントの吹出しの反作用により本体
11には上記当面25を受止面５に押し付ける力が作用し、
上記当接状態がより確実に維持される。その結果、主軸
１をその軸線方向に進退させて工具３により被加工物の
切削加工をする際の、主軸１の進退寸法と工具３の進退
寸法とは正確に一致し、被加工物を高寸法精度で切削加
工できる。In the above case, the pressure of the coolant in the oil supply passage 60, for example, several Kg / cm 2 to several 10 Kg / cm 2 is the receiving hole.
86, the oil passages 81 and 82, and the space 83.
Since the opening surface of a is parallel to the axis 11a, the area of the receiving hole 86, the oil passages 81 and 82, and the space 83 on one side in the axial direction 11a of the main body 11 is the same as the area on the opposite side. As a result, the pressure does not exert a force to move the body 11 in the axial direction. Therefore, the main shaft 1 which is the receiving surface 5
With respect to the end surface of the tool holder 2, a state in which a step portion provided on the outer periphery of the tool holder 2 facing the insertion portion 12 side is in contact, that is, the contact surface 25 is in contact is maintained. Not only that, but due to the reaction of the coolant blown from the outlet 64a, the main body
A force for pressing the above-mentioned contact surface 25 against the receiving surface 5 acts on 11,
The contact state is maintained more reliably. As a result, when the spindle 1 is moved back and forth in the axial direction and the workpiece is cut by the tool 3, the forward and backward dimensions of the spindle 1 and the forward and backward dimensions of the tool 3 are exactly the same, and the workpiece is raised. Can be cut with dimensional accuracy.
【００１５】次に図４は本願の異なる実施例を示すもの
で、周囲の保持部材93に対して回動自在となっている主
軸1eにおいて中空部4eの周壁に、保持部材93の側のクー
ラント供給源に連通する給油路60ｅを備えさせて、該周
壁の内周面（直円筒面である）に供給口76ｅを備えさ
せ、一方、工具保持具2eにおける挿入部12ｅの外周面
（直円筒面である）にクーラントの受入口86aeを備えさ
せた例を示すものである。尚部材84ｅは栓としての機能
を果たす。なお、機能上前図のものと同一又は均等の構
成で説明が重複すると考えられる部分には、前図と同一
の符号にアルファベットのｅを付して重複する説明を省
略した。Next, FIG. 4 shows another embodiment of the present invention, in which the coolant on the holding member 93 side is attached to the peripheral wall of the hollow portion 4e of the main shaft 1e which is rotatable with respect to the surrounding holding member 93. An oil supply passage 60e communicating with the supply source is provided, and a supply port 76e is provided on the inner peripheral surface (which is a right cylindrical surface) of the peripheral wall, while the outer peripheral surface (right cylindrical surface) of the insertion portion 12e in the tool holder 2e is provided. Surface) is provided with a coolant inlet 86ae. The member 84e functions as a stopper. It should be noted that parts having the same or equivalent configurations as those of the previous figure in terms of function and overlapping description will be omitted by adding the letter e to the same reference numerals as in the previous figure and adding the letter e.
【００１６】[0016]
【発明の効果】以上のように本願発明の構成により第１
から第３の目的を達成して、装着した工具３により被加
工物に切削を行う場合、工具に向けてクーラントの供給
を行って切削部の冷却及び潤滑を行うことができる効果
がある。しかもその場合、クーラントの供給圧力が保持
具に加わっても、保持具にはそれを主軸１から押し出そ
うとする力が加わらないようにすることができて、主軸
１の前進寸法と工具３による被加工物の切削深さとを正
確に一致させて、被加工物を高寸法精度で切削加工でき
る効果がある。As described above, according to the configuration of the present invention, the first
From the above, when the third object is achieved and the workpiece is cut by the attached tool 3, the coolant can be supplied to the tool to cool and lubricate the cut portion. Moreover, in that case, even if the supply pressure of the coolant is applied to the holder, it is possible to prevent the holder from being applied with a force that pushes it out from the spindle 1, and the advance dimension of the spindle 1 and the tool 3 There is an effect that the cutting depth of the work piece can be accurately matched with each other and the work piece can be cut with high dimensional accuracy.
【図１】主軸に工具保持具を装着した状態を示す一部破
断図。FIG. 1 is a partially cutaway view showing a state in which a tool holder is attached to a spindle.
【図２】図１におけるII−II線断面図。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】主軸に工具保持具を装着する前の状態を示す断
面図。FIG. 3 is a cross-sectional view showing a state before the tool holder is attached to the spindle.
【図４】異なる実施例を示す部分図（断面図）。FIG. 4 is a partial view (cross-sectional view) showing a different embodiment.
【図５】（Ａ）は主軸に対する装着前の状態の保持具と
主軸を一部を外観図で示す断面図、（Ｂ）は（Ａ）の一
部を外観面で示すII−II線断面図。FIG. 5A is a cross-sectional view showing a part of the holder and the spindle in a state before being attached to the main shaft in an external view, and FIG. 5B is a cross-sectional view taken along the line II-II showing a part of the external appearance in FIG. 5A. Fig.
【図６】主軸の斜視図。FIG. 6 is a perspective view of a spindle.
【図７】図５（Ａ）のIV−IV線断面図。FIG. 7 is a sectional view taken along line IV-IV of FIG.
【図８】図５（Ａ）のV−V線断面図。FIG. 8 is a sectional view taken along line VV of FIG.
【図９】図５（Ａ）のVI−VI線断面図。FIG. 9 is a sectional view taken along line VI-VI of FIG.
【図１０】装着途中状態の保持具と主軸を一部を外観図
で示す断面図。FIG. 10 is a cross-sectional view showing an external view of a part of the holder and the spindle in the state of being mounted.
【図１１】図１０の一部を外観図で示すVIII−VIII線断
面図。11 is a cross-sectional view taken along the line VIII-VIII showing a part of FIG. 10 in an external view.
【図１２】装着完了状態の保持具と主軸を一部を外観図
で示す断面図（部分図）。FIG. 12 is a cross-sectional view (partial view) showing a part of the holder and the spindle in a completely mounted state in an external view.
【図１３】図１２の一部を外観図で示すX−X線断面図
（部分図）。FIG. 13 is a cross-sectional view (partial view) taken along line X-X showing a part of FIG. 12 in an external view.
【図１４】装着完了状態の保持具と主軸を示す平面図
（部分図）。FIG. 14 is a plan view (partial view) showing the holder and the main shaft in a mounting completed state.
【図１５】図１０の矢印XII部分の拡大図。FIG. 15 is an enlarged view of an arrow XII portion in FIG.
【図１６】係止部に対する引止爪の係合過程を説明する
断面図（図１５のXIII−XIII線断面図）。16 is a cross-sectional view (cross-sectional view taken along line XIII-XIII in FIG. 15) for explaining the engagement process of the detent claws with the locking portion.
【図１７】図１２の矢印XIV部分の拡大図。FIG. 17 is an enlarged view of an arrow XIV portion of FIG.
【図１８】給油構造を備えた従来の工具保持具を示す一
部破断図。FIG. 18 is a partially cutaway view showing a conventional tool holder provided with an oil supply structure.
１ 主軸 ２ 工具保持具 ３ 工具 11 本体 12 挿入部 76 供給口 86ａ 受入口 91 送出口 1 Spindle 2 Tool Holder 3 Tool 11 Main Body 12 Insertion Part 76 Supply Port 86a Receiving Port 91 Outlet
Claims (1)
し込む為の中空部を主軸の端面に開口する状態に設け、
一方工具装着部を備えた工具保持具は、その挿入部を上
記主軸の中空部に差し込むと共に、該工具保持具の外周
に上記挿入部側を向く状態に設けられた段部を上記主軸
の端面に当接させた状態で上記主軸に装着し、上記主軸
に設けられ且つクーラントの供給源に連なっている給油
路から、上記保持具に設けられ且つ上記工具装着部に装
着される工具に対してクーラントを供給する為の送出口
に連なっている通油路に対して、クーラントを供給する
ようにしてある工具取付構造において、上記給油路から
通油路へのクーラントの供給の為の構造は、上記挿入部
の外周面、又は、挿入部の端面に設けた凹部の内周面
に、上記通油路に連通する受入口を設け、一方上記主軸
においては、該主軸に上記工具保持具を装着した状態に
おいて上記挿入部の外周面と対向する周壁の内周面、又
は、上記主軸に、上記挿入部に設けた凹部の内周面と対
向する状態に備えさせた部材の外周面に、上記受入口に
クーラントを供給するための供給口であって上記給油路
に連通している供給口を備えさせたことを特徴とする工
具取付構造。1. A main shaft is provided with a hollow part for inserting an insertion part of a tool holder in a state of being opened at an end face of the main shaft,
On the other hand, a tool holder provided with a tool mounting portion inserts the insertion portion into the hollow portion of the spindle, and at the same time, a step portion provided on the outer periphery of the tool holder facing the insertion portion is provided on the end surface of the spindle. Mounted on the main spindle in a state of being in contact with the main shaft, and from the oil supply passage provided on the main spindle and connected to the coolant supply source to the tool provided on the holder and mounted on the tool mounting portion. In the tool mounting structure for supplying the coolant to the oil passage that is connected to the outlet for supplying the coolant, the structure for supplying the coolant from the oil passage to the oil passage is On the outer peripheral surface of the insertion portion or on the inner peripheral surface of the recess provided on the end surface of the insertion portion, a receiving port communicating with the oil passage is provided, while in the main spindle, the tool holder is mounted on the main spindle. In the inserted state The coolant is supplied to the inlet on the inner peripheral surface of the peripheral wall facing the peripheral surface, or on the outer peripheral surface of a member provided on the main shaft so as to face the inner peripheral surface of the recess provided in the insertion portion. A tool mounting structure, characterized in that it is provided with a supply port for communicating with the oil supply passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08259194A JP3364698B2 (en) | 1994-03-28 | 1994-03-28 | Tool mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08259194A JP3364698B2 (en) | 1994-03-28 | 1994-03-28 | Tool mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07266109A true JPH07266109A (en) | 1995-10-17 |
| JP3364698B2 JP3364698B2 (en) | 2003-01-08 |
Family
ID=13778734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08259194A Expired - Lifetime JP3364698B2 (en) | 1994-03-28 | 1994-03-28 | Tool mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3364698B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998008641A1 (en) * | 1996-08-26 | 1998-03-05 | Kuroda Seiko Co., Ltd. | Tool attaching/detaching device |
-
1994
- 1994-03-28 JP JP08259194A patent/JP3364698B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998008641A1 (en) * | 1996-08-26 | 1998-03-05 | Kuroda Seiko Co., Ltd. | Tool attaching/detaching device |
| US6062779A (en) * | 1996-08-26 | 2000-05-16 | Kuroda Seiko Co., Ltd. | Tool attaching/detaching device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3364698B2 (en) | 2003-01-08 |
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