JP7021715B1

JP7021715B1 - Sealing member and replaceable head tool

Info

Publication number: JP7021715B1
Application number: JP2021165259A
Authority: JP
Inventors: 寛生島貫
Original assignee: Tungaloy Corp
Current assignee: Tungaloy Corp
Priority date: 2021-10-07
Filing date: 2021-10-07
Publication date: 2022-02-17
Anticipated expiration: 2041-10-07
Also published as: JP2023056128A

Abstract

【課題】ヘッド交換式工具からの流体の流出を防止することのできる封止部材、及び当該封止部材を備えるヘッド交換式工具を提供する。【解決手段】ヘッド交換式工具１０は、工作機械によって把持されるシャンク部１００と、切れ刃を有しシャンク部１００に取り付けられるヘッド部２００と、を有し、切れ刃又はその周囲に流体を供給するための流路が、シャンク部１００及びヘッド部２００のそれぞれの内部を通るように形成されたものである。ヘッド交換式工具１０に用いられる封止部材３００は、ヘッド部２００を挿入するための穴としてシャンク部１００に形成された取付穴１０２に対し、ヘッド部２００に換えて挿入される挿入部３２０と、取付穴１０２に挿入部３２０が挿入された状態において、流路から流体が流出することを防止する第１シール部３５１、第２シール部３５２と、を備える。【選択図】図４PROBLEM TO BE SOLVED: To provide a sealing member capable of preventing fluid from flowing out from a head exchangeable tool, and a head exchangeable tool provided with the sealing member. SOLUTION: A head exchangeable tool 10 has a shank portion 100 gripped by a machine tool and a head portion 200 having a cutting edge and attached to the shank portion 100, and fluid is applied to the cutting edge or its surroundings. The flow path for supplying is formed so as to pass through the inside of each of the shank portion 100 and the head portion 200. The sealing member 300 used in the head replaceable tool 10 has an insertion portion 320 inserted in place of the head portion 200 with respect to the mounting hole 102 formed in the shank portion 100 as a hole for inserting the head portion 200. The first seal portion 351 and the second seal portion 352 that prevent the fluid from flowing out from the flow path when the insertion portion 320 is inserted into the mounting hole 102 are provided. [Selection diagram] FIG. 4

Description

本発明は、封止部材及びヘッド交換式工具に関する。 The present invention relates to a sealing member and a head replaceable tool.

例えば自動旋盤のような工作機械に取り付けられる切削工具として、ヘッド交換式工具が知られている。ヘッド交換式工具は、工作機械によって把持される部分であるシャンク部と、切れ刃を有する部分であるヘッド部と、を有しており、これらを互いに分離することが可能となっている。工作機械の刃物台にシャンク部を取り付けた状態のまま、ヘッド部を交換することができるので、切れ刃を変更する作業等を容易に且つ短時間のうちに行うことができる。下記特許文献１には、このようなヘッド交換式工具の一例が開示されている。 For example, as a cutting tool attached to a machine tool such as an automatic lathe, a head exchange type tool is known. The head replaceable tool has a shank portion, which is a portion gripped by the machine tool, and a head portion, which is a portion having a cutting edge, and these can be separated from each other. Since the head portion can be replaced with the shank portion attached to the tool post of the machine tool, the work of changing the cutting edge can be easily performed in a short time. The following Patent Document 1 discloses an example of such a head exchangeable tool.

特開昭６１－８６１４８号公報Japanese Unexamined Patent Publication No. 61-86148

工作機械による被削材の加工は、切削工具の切れ刃と被削材とが当たる点（切削点）もしくはその周囲に、流体を供給しながら行われるのが一般的である。このような流体は、例えば、切りくずの排出や、切削工具の冷却、被削材の冷却、潤滑、及び防錆等を目的として供給されるものである。尚、流体としては液体が用いられることが多いが、気体が用いられることもある。 Machining of a work material by a machine tool is generally performed while supplying a fluid to or around a point (cutting point) where the cutting edge of a cutting tool and the work material come into contact with each other. Such a fluid is supplied for the purpose of discharging chips, cooling a cutting tool, cooling a work material, lubricating, rust prevention, or the like. A liquid is often used as the fluid, but a gas may also be used.

切削工具の中には、流体を通すための流路が内部に形成されたものがある。このような流路がヘッド交換式工具に設けられる場合には、シャンク部及びヘッド部のそれぞれに流路が形成され、それぞれの流路が互いに接続されることとなる。 Some cutting tools have an internal flow path for the fluid to pass through. When such a flow path is provided in the head exchangeable tool, a flow path is formed in each of the shank portion and the head portion, and the respective flow paths are connected to each other.

ところで、自動旋盤の刃物台には複数の切削工具が取り付け可能となっている。自動旋盤は、これら複数の切削工具から、加工に用いる切削工具を自動的に切り換えながら被削材の加工を行う。それぞれの切削工具の内部流路には、刃物台を通じて流体が供給される。尚、刃物台には、流体の供給経路を、それぞれの切削工具毎に個別に開閉するような機構は設けられていないので、流体の供給及び停止は複数本の切削工具毎にまとめて行われる。 By the way, a plurality of cutting tools can be attached to the tool post of an automatic lathe. The automatic lathe processes the work material while automatically switching the cutting tool used for machining from these plurality of cutting tools. Fluid is supplied to the internal flow path of each cutting tool through the turret. Since the tool post is not provided with a mechanism for opening and closing the fluid supply path individually for each cutting tool, the fluid supply and stop are collectively performed for each of a plurality of cutting tools. ..

被削材の形状によっては、刃物台に取り付けられた複数のヘッド交換式工具のうちの一部が、被削材に干渉してしまうことがある。この場合、当該ヘッド交換式工具のシャンク部からヘッド部を取り外しておくことで、上記のような干渉を防止することができる。しかしながら、この場合には、流路の開放に伴ってシャンク部の先端から多量の流体が流出し、流体の内圧が低下する等の問題が生じてしまう。このような問題を防止するためには、刃物台から当該シャンク部に対する流体の供給のみを停止できればよいのであるが、上記のように、刃物台には、流体の供給及び停止を切削工具毎に切り換えるような機構は設けられていない。 Depending on the shape of the work material, some of the plurality of replaceable head tools attached to the tool post may interfere with the work material. In this case, by removing the head portion from the shank portion of the head replaceable tool, the above-mentioned interference can be prevented. However, in this case, a large amount of fluid flows out from the tip of the shank portion as the flow path is opened, which causes problems such as a decrease in the internal pressure of the fluid. In order to prevent such a problem, it is only necessary to stop the supply of fluid from the turret to the shank portion, but as described above, the turret is supplied with and stopped from the fluid for each cutting tool. There is no mechanism for switching.

本発明は、ヘッド交換式工具からの流体の流出を防止することのできる封止部材、及び当該封止部材を備えるヘッド交換式工具を提供することを目的とする。 An object of the present invention is to provide a sealing member capable of preventing fluid from flowing out from a head exchangeable tool, and a head exchangeable tool provided with the sealing member.

本発明の一態様に係る封止部材は、ヘッド交換式工具に用いられる封止部材である。ヘッド交換式工具は、工作機械によって把持されるシャンク部と、切れ刃を有しシャンク部に取り付けられるヘッド部と、を有し、切れ刃又はその周囲に流体を供給するための流路が、シャンク部及びヘッド部のそれぞれの内部を通るように形成されたものである。この封止部材は、ヘッド部を挿入するための穴としてシャンク部に形成された取付穴に対し、ヘッド部に換えて挿入される挿入部と、取付穴に挿入部が挿入された状態において、流路から流体が流出することを防止するシール部と、を備える。 The sealing member according to one aspect of the present invention is a sealing member used for a head exchangeable tool. The head replaceable tool has a shank portion gripped by a machine tool and a head portion having a cutting edge and attached to the shank portion, and a flow path for supplying a fluid to the cutting edge or its surroundings is provided. It is formed so as to pass through the inside of each of the shank portion and the head portion. This sealing member has an insertion portion to be inserted in place of the head portion and an insertion portion inserted into the mounting hole with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion. A seal portion for preventing fluid from flowing out from the flow path is provided.

ヘッド交換式工具のシャンク部に対し、ヘッド部に換えて上記構成の封止部材を取り付ければ、封止部材が備えるシール部により、シャンク部からの流体の流出を防止することができる。 If a sealing member having the above configuration is attached to the shank portion of the head replaceable tool instead of the head portion, the sealing portion provided in the sealing member can prevent the fluid from flowing out from the shank portion.

更に好ましい態様として、挿入部の形状が回転体形状であり、当該回転体形状の回転軸は、挿入部が取付穴に挿入される際の挿入方向に沿っていることとしてもよい。 As a more preferable embodiment, the shape of the insertion portion may be the shape of a rotating body, and the rotation axis of the rotating body shape may be along the insertion direction when the insertion portion is inserted into the mounting hole.

更に好ましい態様として、取付穴に挿入部が挿入された状態において、取付穴からシャンク部の外側へと突出する突出部、を更に備えてもよい。 As a more preferable embodiment, a protruding portion that protrudes from the mounting hole to the outside of the shank portion may be further provided in a state where the insertion portion is inserted into the mounting hole.

更に好ましい態様として、取付穴に挿入部が挿入された状態において、突出部は、シャンク部のうち取付穴の縁を全周に亘り覆った状態となってもよい。 As a further preferred embodiment, when the insertion portion is inserted into the mounting hole, the protruding portion may be in a state of covering the entire circumference of the edge of the mounting hole in the shank portion.

更に好ましい態様として、突出部を含む全体の形状が回転体形状であり、当該回転体形状の回転軸は、挿入部が前記取付穴に挿入される際の挿入方向に沿っていてもよい。 As a further preferred embodiment, the entire shape including the protruding portion is a rotating body shape, and the rotating shaft of the rotating body shape may be along the insertion direction when the insertion portion is inserted into the mounting hole.

更に好ましい態様として、突出部の側面が凹状に後退していてもよい。 As a more preferable embodiment, the side surface of the protrusion may be recessed.

更に好ましい態様として、シール部は、第１シール部と、第１シール部よりも取付穴の奥側となる位置に配置される第２シール部と、を含んでもよい。 As a more preferable embodiment, the seal portion may include a first seal portion and a second seal portion arranged at a position deeper than the first seal portion in the mounting hole.

更に好ましい態様として、第２シール部は、挿入部に取り付けられた環状の部材であってもよい。 As a further preferred embodiment, the second seal portion may be an annular member attached to the insertion portion.

更に好ましい態様として、取付穴に挿入部が挿入された状態において、第２シール部は、挿入部の外周面と、取付穴の内周面との間に挟み込まれてもよい。 As a further preferred embodiment, the second seal portion may be sandwiched between the outer peripheral surface of the insertion portion and the inner peripheral surface of the mounting hole in a state where the insertion portion is inserted into the mounting hole.

更に好ましい態様として、取付穴に挿入部が挿入された状態において、第１シール部は取付穴の縁に当接してもよい。 As a further preferred embodiment, the first seal portion may abut on the edge of the mounting hole in a state where the insertion portion is inserted into the mounting hole.

更に好ましい態様として、第１シール部は、挿入方向に対し垂直に切断した場合における断面の形状が、第２シール部側に行くほど小さくなってもよい。 As a more preferable embodiment, the shape of the cross section of the first seal portion when cut perpendicular to the insertion direction may become smaller toward the second seal portion side.

更に好ましい態様として、挿入部のうち第１シール部と第２シール部との間となる位置には、挿入方向に対し垂直に切断した場合における断面の形状が、第２シール部側に行くほど大きくなる拡大部を有していてもよい。 As a more preferable embodiment, at the position between the first seal portion and the second seal portion of the insertion portion, the shape of the cross section when cut perpendicular to the insertion direction becomes closer to the second seal portion side. It may have an enlarged portion to be enlarged.

更に好ましい態様として、取付穴に挿入部が挿入された状態を、挿入方向に沿って見た場合において、全体の外形がシャンク部の外形の内側に収まっていてもよい。 As a more preferable embodiment, when the state in which the insertion portion is inserted into the mounting hole is viewed along the insertion direction, the entire outer shape may be contained inside the outer shape of the shank portion.

本発明の一態様に係るヘッド交換式工具は、工作機械によって把持される部分であって、切れ刃を有するヘッド部を取り付け可能なシャンク部を備え、切れ刃に流体を供給するための流路が、シャンク部の内部を通るように形成されており、ヘッド部に換えてシャンク部に取り付けられることで、流路から流体が流出することを防止する封止部材を更に備える。
The head replaceable tool according to one aspect of the present invention is a portion gripped by a machine tool, includes a shank portion to which a head portion having a cutting edge can be attached , and is a flow path for supplying a fluid to the cutting edge. However, it is formed so as to pass through the inside of the shank portion, and is further provided with a sealing member for preventing the fluid from flowing out from the flow path by being attached to the shank portion instead of the head portion.

上記構成のヘッド交換式工具では、ヘッド部に換えて封止部材を取り付けることにより、シャンク部からの流体の流出を防止することができる。 In the head replaceable tool having the above configuration, it is possible to prevent the fluid from flowing out from the shank portion by attaching a sealing member instead of the head portion.

本発明によれば、ヘッド交換式工具からの流体の流出を防止することのできる封止部材、及び当該封止部材を備えるヘッド交換式工具が提供される。 According to the present invention, there is provided a sealing member capable of preventing the outflow of fluid from the head replaceable tool, and a head replaceable tool provided with the sealing member.

図１は、刃物台に複数のヘッド交換式工具が取り付けられた状態を示す図である。FIG. 1 is a diagram showing a state in which a plurality of replaceable head tools are attached to a tool post. 図２は、第１実施形態に係るヘッド交換式工具のうち、シャンク部の構成を示す図である。FIG. 2 is a diagram showing a configuration of a shank portion of the head replaceable tool according to the first embodiment. 図３は、第１実施形態に係るヘッド交換式工具のうち、ヘッド部の構成を示す図である。FIG. 3 is a diagram showing a configuration of a head portion of the head replaceable tool according to the first embodiment. 図４は、第１実施形態に係る封止部材が、シャンク部に取り付けられた状態を示す図である。FIG. 4 is a diagram showing a state in which the sealing member according to the first embodiment is attached to the shank portion. 図５は、第１実施形態に係る封止部材が、シャンク部に取り付けられた状態を示す図である。FIG. 5 is a diagram showing a state in which the sealing member according to the first embodiment is attached to the shank portion. 図６は、第１実施形態に係る封止部材の具体的な構成を示す図である。FIG. 6 is a diagram showing a specific configuration of the sealing member according to the first embodiment. 図７は、第１実施形態に係る封止部材が、シャンク部に取り付けられた状態を示す図である。FIG. 7 is a diagram showing a state in which the sealing member according to the first embodiment is attached to the shank portion. 図８は、第１実施形態に係る封止部材において、固定螺子との接触により傷が生じ得る箇所を示す図である。FIG. 8 is a diagram showing a portion of the sealing member according to the first embodiment where scratches may occur due to contact with the fixing screw. 図９は、第１実施形態の変形例に係る封止部材において、固定螺子との接触により傷が生じ得る箇所を示す図である。FIG. 9 is a diagram showing a portion of the sealing member according to the modified example of the first embodiment where scratches may occur due to contact with the fixing screw. 図１０は、第２実施形態に係る封止部材の具体的な構成を示す図である。FIG. 10 is a diagram showing a specific configuration of the sealing member according to the second embodiment.

以下、添付図面を参照しながら本実施形態について説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。 Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In order to facilitate understanding of the description, the same components are designated by the same reference numerals as possible in the drawings, and duplicate description is omitted.

第１実施形態について説明する。本実施形態に係るヘッド交換式工具１０は、自動旋盤ＭＴの刃物台２０に取り付けられ、被削材３０の加工に用いられる切削工具である。図１に示されるように、刃物台２０には複数個のヘッド交換式工具１０を取り付けることが可能となっている。 The first embodiment will be described. The head exchangeable tool 10 according to the present embodiment is a cutting tool attached to the tool post 20 of the automatic lathe MT and used for machining the work material 30. As shown in FIG. 1, a plurality of head exchangeable tools 10 can be attached to the tool post 20.

自動旋盤ＭＴは、不図示の機構により保持された棒状の被削材３０（ワーク）を回転させながら、ヘッド交換式工具１０の切削インサート２３０を当てることによって被削材３０を加工する工作機械である。自動旋盤ＭＴは、刃物台２０の位置を変更することにより、被削材３０に当たるヘッド交換式工具、すなわち、加工に用いられるヘッド交換式工具１０を切り換える。これにより、被削材３０の各部の加工を自動的に連続して行うことができる。このような自動旋盤ＭＴとしては、従来と同様の構成のものを用いることができる。 The automatic lathe MT is a machine tool that processes a work material 30 by hitting a cutting insert 230 of a head exchangeable tool 10 while rotating a rod-shaped work material 30 (work) held by a mechanism (not shown). be. The automatic lathe MT switches the head exchangeable tool that hits the work material 30, that is, the head exchangeable tool 10 used for machining, by changing the position of the tool post 20. As a result, each part of the work material 30 can be automatically and continuously processed. As such an automatic lathe MT, one having the same configuration as the conventional one can be used.

ヘッド交換式工具１０は、シャンク部１００とヘッド部２００とを備えている。シャンク部１００は、自動旋盤ＭＴの刃物台２０によって把持される部分である。ヘッド部２００は、切れ刃（本実施形態では切削インサート２３０の一部）を有しシャンク部１００に取り付けられる部分である。 The head replaceable tool 10 includes a shank portion 100 and a head portion 200. The shank portion 100 is a portion gripped by the tool post 20 of the automatic lathe MT. The head portion 200 is a portion having a cutting edge (a part of the cutting insert 230 in this embodiment) and attached to the shank portion 100.

先ず、シャンク部１００の構成について説明する。シャンク部１００は、その全体が棒状の部材となっており、図１における上方側の部分が刃物台２０によって把持される。シャンク部１００のうち、図１における下方側の部分には、ヘッド部２００が取り付けられ固定される。 First, the configuration of the shank portion 100 will be described. The shank portion 100 is a rod-shaped member as a whole, and the upper portion in FIG. 1 is gripped by the tool post 20. The head portion 200 is attached and fixed to the lower portion of the shank portion 100 in FIG. 1.

図２には、ヘッド部２００が取り外された状態のシャンク部１００が示されている。シャンク部１００の先端面１０５には、円形の取付穴１０２が形成されている。取付穴１０２は、ヘッド部２００に設けられた挿入部２２０（図３を参照）を挿入するための穴である。 FIG. 2 shows a shank portion 100 in a state where the head portion 200 is removed. A circular mounting hole 102 is formed on the tip surface 105 of the shank portion 100. The mounting hole 102 is a hole for inserting the insertion portion 220 (see FIG. 3) provided in the head portion 200.

後の説明に用いる図６に示されるように、シャンク部１００の内部には、流体を供給するための流路１０１が形成されている。流路１０１は断面が円形の流路であって、シャンク部１００の長手方向に沿ってシャンク部１００を貫くように形成されている。取付穴１０２は、流路１０１のうち先端面１０５側の部分に形成された穴であり、流路１０１と繋がっている。流路１０１の中心軸と取付穴１０２の中心軸とは互いに一致している。尚、このような流路１０１と取付穴１０２との位置関係は、あくまで一例である。流路１０１の中心軸と取付穴１０２の中心軸とが、互いに一致していないような態様であってもよい。本実施形態では、取付穴１０２の内径が流路１０１の内径よりも大きくなっている。 As shown in FIG. 6 used later, a flow path 101 for supplying a fluid is formed inside the shank portion 100. The flow path 101 is a flow path having a circular cross section, and is formed so as to penetrate the shank portion 100 along the longitudinal direction of the shank portion 100. The mounting hole 102 is a hole formed in a portion of the flow path 101 on the tip surface 105 side, and is connected to the flow path 101. The central axis of the flow path 101 and the central axis of the mounting hole 102 coincide with each other. The positional relationship between the flow path 101 and the mounting hole 102 is merely an example. The central axis of the flow path 101 and the central axis of the mounting hole 102 may not coincide with each other. In this embodiment, the inner diameter of the mounting hole 102 is larger than the inner diameter of the flow path 101.

尚、上記の「流体」とは、切りくずの排出や、切削工具の冷却、被削材の冷却、潤滑、及び防錆等を目的として刃物台２０から供給されるものであり、例えば「クーラント」や「潤滑剤」等と称されるものである。流体が供給される目的は特に限定されない。また、流体は、液体であってもよいが、気体であってもよい。 The above-mentioned "fluid" is supplied from the tool post 20 for the purpose of discharging chips, cooling cutting tools, cooling work materials, lubricating, rust prevention, etc., and is, for example, "coolant". , "Lubricant" and the like. The purpose for which the fluid is supplied is not particularly limited. Further, the fluid may be a liquid or a gas.

図２に示されるように、シャンク部１００の側面であって先端面１０５の近傍となる位置には、固定螺子１２０が設けられている。固定螺子１２０は、取付穴１０２の中心軸に対し垂直な方向に沿って進退するように設けられた螺子であり、取付穴１０２に挿入された挿入部２２０を固定するためのものである。 As shown in FIG. 2, a fixed screw 120 is provided on the side surface of the shank portion 100 at a position near the tip end surface 105. The fixing screw 120 is a screw provided so as to advance and retreat along a direction perpendicular to the central axis of the mounting hole 102, and is for fixing the insertion portion 220 inserted into the mounting hole 102.

シャンク部１００の先端面１０５には、更に先端側に向かって突出するように突出部１１０が設けられている。突出部１１０は、ヘッド部２００を取り付ける際における位置合わせ等のために用いられるものである。 The tip surface 105 of the shank portion 100 is provided with a protrusion 110 so as to further project toward the tip side. The protrusion 110 is used for positioning and the like when the head portion 200 is attached.

続いて、ヘッド部２００の構成について説明する。図３には、シャンク部１００から取り外された状態のヘッド部２００が示されている。ヘッド部２００は、本体部２１０と、挿入部２２０と、を有している。 Subsequently, the configuration of the head unit 200 will be described. FIG. 3 shows the head portion 200 in a state of being removed from the shank portion 100. The head portion 200 has a main body portion 210 and an insertion portion 220.

本体部２１０は、切削インサート２３０を保持する部分である。切削インサート２３０は、そのエッジ部分が切れ刃として機能する。尚、本体部２１０に設けられる「切れ刃」は、本実施形態のように取り外し可能な切削インサート２３０の一部であってもよいが、本体部２１０と一体となっていてもよい。 The main body 210 is a portion that holds the cutting insert 230. The edge portion of the cutting insert 230 functions as a cutting edge. The "cutting edge" provided on the main body 210 may be a part of the removable cutting insert 230 as in the present embodiment, but may be integrated with the main body 210.

挿入部２２０は、本体部２１０のうち切れ刃とは反対側の端部から突出するように設けられた部分である。先に述べたように、挿入部２２０は、シャンク部１００の取付穴１０２に挿入され、固定螺子１２０の締め付けによって固定される部分である。 The insertion portion 220 is a portion of the main body portion 210 that is provided so as to protrude from the end portion on the side opposite to the cutting edge. As described above, the insertion portion 220 is a portion that is inserted into the mounting hole 102 of the shank portion 100 and fixed by tightening the fixing screw 120.

挿入部２２０の形状は略円柱形状であり、その外径は、取付穴１０２の内径よりも小さい。ただし、図３において一点鎖線２２１で示された範囲は、他の部分よりも中心軸側に後退した平坦面となっている。当該範囲は、固定螺子１２０の先端が当接する部分を包含する範囲となっている。尚、固定螺子１２０が締め付けられた際において、挿入部２２０が取付穴１０２の奥側に向かう力を受けるよう、一点鎖線２２１で示された範囲の一部が傾斜面となっていてもよい。 The shape of the insertion portion 220 is substantially a cylindrical shape, and the outer diameter thereof is smaller than the inner diameter of the mounting hole 102. However, the range shown by the alternate long and short dash line 221 in FIG. 3 is a flat surface recessed toward the central axis side from the other portions. The range includes a portion where the tip of the fixed screw 120 abuts. When the fixed screw 120 is tightened, a part of the range indicated by the alternate long and short dash line 221 may be an inclined surface so that the insertion portion 220 receives a force toward the inner side of the mounting hole 102.

尚、図３に示される挿入部２２０の形状は模式的なものであり、上記の一点鎖線２２１の部分を含め、詳細な形状については一部図示が省略されている。挿入部２２０には、例えば、流体が漏出してしまうことを防止するためのＯリングや、当該Ｏリングを保持するための溝等が設けられていてもよい。 The shape of the insertion portion 220 shown in FIG. 3 is schematic, and the detailed shape including the portion of the alternate long and short dash line 221 is partially omitted. The insertion portion 220 may be provided with, for example, an O-ring for preventing the fluid from leaking, a groove for holding the O-ring, or the like.

図３において点線で示されるように、ヘッド部２００の内部には流路２０１が形成されている。流路２０１は、シャンク部１００の流路１０１を通った流体を受け入れて、当該流体を切削インサート２３０の切れ刃又はその周囲に向けて噴射させるための流路である。つまり、シャンク部１００とヘッド部２００とが接続されている状態においては、流路１０１及び流路２０１は互いに繋がった一つの流路となる。流路２０１は、本体部２１０及び挿入部２２０の両方を通る略直線状の流路として形成されている。流路２０１のうち挿入部２２０を通る部分の中心軸は、挿入部２２０の中心軸と一致している。 As shown by the dotted line in FIG. 3, the flow path 201 is formed inside the head portion 200. The flow path 201 is a flow path for receiving the fluid that has passed through the flow path 101 of the shank portion 100 and injecting the fluid toward the cutting edge of the cutting insert 230 or its periphery. That is, in the state where the shank portion 100 and the head portion 200 are connected, the flow path 101 and the flow path 201 become one flow path connected to each other. The flow path 201 is formed as a substantially linear flow path that passes through both the main body portion 210 and the insertion portion 220. The central axis of the portion of the flow path 201 that passes through the insertion portion 220 coincides with the central axis of the insertion portion 220.

このように、ヘッド交換式工具１０には、切れ刃又はその周囲に流体を供給するための流路（１０１、２０１）が、シャンク部１００及びヘッド部２００のそれぞれの内部を通るように形成されている。加工時においては、刃物台２０から、それぞれのシャンク部１００の流路１０１に流体が供給される。当該流体は、流路１０１及び流路２０１を順に通った後、切れ刃又はその周囲に向けて噴射される。このため、刃物台２０に複数のヘッド交換式工具１０が取り付けられているときには、それぞれのヘッド交換式工具１０から外部へと流体が流出することとなる。 In this way, the head replaceable tool 10 is formed with a flow path (101, 201) for supplying a fluid to the cutting edge or its periphery so as to pass through the inside of the shank portion 100 and the head portion 200, respectively. ing. At the time of processing, the fluid is supplied from the tool post 20 to the flow path 101 of each shank portion 100. The fluid passes through the flow path 101 and the flow path 201 in order, and then is ejected toward the cutting edge or its periphery. Therefore, when a plurality of head exchangeable tools 10 are attached to the tool post 20, the fluid flows out from each of the head exchangeable tools 10.

ところで、被削材３０の形状や加工のプロセスによっては、刃物台２０に取り付けられた複数のヘッド交換式工具１０のうちの一部と、被削材３０との干渉が問題となる場合がある。この場合、当該ヘッド交換式工具１０のシャンク部１００からヘッド部２００を取り外しておけば、上記のような干渉を防止することができる。 By the way, depending on the shape of the work material 30 and the processing process, interference between a part of the plurality of replaceable head tools 10 attached to the tool post 20 and the work material 30 may become a problem. .. In this case, if the head portion 200 is removed from the shank portion 100 of the head replaceable tool 10, the above-mentioned interference can be prevented.

図１に示される例では、中央に取り付けられたヘッド交換式工具１０のシャンク部１００から、ヘッド部２００が取り外された状態となっている。点線ＤＬ１は、当該ヘッド部２００が取り付けられている場合におけるその外形を表している。中央のヘッド部２００を予め取り外しておくことにより、被削材３０が点線ＤＬ１の範囲と重なるような位置となるまで、刃物台２０を動かすことが可能となっている。これにより、ヘッド部２００と被削材３０との干渉が防止され、自動旋盤ＭＴによる加工可能な範囲が拡大される。 In the example shown in FIG. 1, the head portion 200 is removed from the shank portion 100 of the head replaceable tool 10 attached to the center. The dotted line DL1 represents the outer shape of the head portion 200 when the head portion 200 is attached. By removing the central head portion 200 in advance, it is possible to move the tool post 20 until the work material 30 is positioned so as to overlap the range of the dotted line DL1. As a result, interference between the head portion 200 and the work material 30 is prevented, and the range that can be machined by the automatic lathe MT is expanded.

しかしながら、ヘッド部２００が取り外されたヘッド交換式工具１０では、シャンク部１００の流路１０１が開放された状態となる。このため、シャンク部１００の先端にある取付穴１０２から多量の流体が流出し、流体が浪費されてしまう。また、流体の内圧が低下することにより、他のヘッド交換式工具１０において切れ刃又はその周囲に十分な量の流体を供給できなくなってしまう可能性がある。 However, in the head replaceable tool 10 from which the head portion 200 has been removed, the flow path 101 of the shank portion 100 is in an open state. Therefore, a large amount of fluid flows out from the mounting hole 102 at the tip of the shank portion 100, and the fluid is wasted. In addition, the decrease in the internal pressure of the fluid may make it impossible for the other head replaceable tool 10 to supply a sufficient amount of fluid to the cutting edge or its surroundings.

更に、ヘッド部２００が取り外されたシャンク部１００では、露出した先端面１０５に向けて他のヘッド交換式工具１０からの切りくずが到達し、取付穴１０２の内面や周囲の形状が変化してしまう可能性がある。その結果、ヘッド部２００の取り付け精度が低下してしまう可能性がある。 Further, in the shank portion 100 from which the head portion 200 has been removed, chips from another head replaceable tool 10 reach the exposed tip surface 105, and the inner surface and the surrounding shape of the mounting hole 102 change. There is a possibility that it will end up. As a result, the mounting accuracy of the head portion 200 may decrease.

多量の流体が流出するという問題を防止するためには、刃物台２０から、ヘッド部２００が取り外されたシャンク部１００に対する流体の供給のみを停止しておけばよいようにも思われる。しかしながら、自動旋盤ＭＴの刃物台２０では、流体の供給経路を、それぞれの切削工具毎に個別に開閉するような機構は設けられておらず、流体の供給及び停止は複数本の切削工具毎にまとめて行われるのが一般的である。従って、ヘッド部２００が取り外されたシャンク部１００に対する流体の供給のみを停止することはできない。 In order to prevent the problem that a large amount of fluid flows out, it seems that it is sufficient to stop only the supply of fluid from the tool post 20 to the shank portion 100 from which the head portion 200 has been removed. However, the tool post 20 of the automatic lathe MT is not provided with a mechanism for opening and closing the fluid supply path individually for each cutting tool, and the fluid supply and stop is performed for each of a plurality of cutting tools. It is generally done together. Therefore, it is not possible to stop only the supply of the fluid to the shank portion 100 from which the head portion 200 has been removed.

ヘッド部２００からの流体の流出を防止するために、加工に用いられないシャンク部１００に対し、例えば小型のヘッド部２００を取り付けておくことも考えられる。しかしながら、シャンク部１００に対しヘッド部２００を取り付ける作業は、ヘッド部２００の方向を所定方向に合わせながら行う必要があるので、流体の流出を抑制する目的でこのような作業を行うのは手間がかかる。また、この場合には、当該ヘッド部２００と被削材３０とが互いに干渉するという問題を十分に解決することはできない。 In order to prevent the outflow of fluid from the head portion 200, it is conceivable to attach, for example, a small head portion 200 to the shank portion 100 that is not used for processing. However, since it is necessary to attach the head portion 200 to the shank portion 100 while aligning the direction of the head portion 200 with a predetermined direction, it is troublesome to perform such work for the purpose of suppressing the outflow of fluid. It takes. Further, in this case, the problem that the head portion 200 and the work material 30 interfere with each other cannot be sufficiently solved.

そこで、本実施形態に係るヘッド交換式工具１０では、ヘッド部２００に換えてシャンク部１００に取り付けておくことのできる部品として、封止部材３００を更に備えている。図４には、中央にあるヘッド交換式工具１０のシャンク部１００に、封止部材３００を取り付けた状態が示されている。図５には、封止部材３００を取り付けた状態のシャンク部１００が斜視図として示されている。 Therefore, the head replaceable tool 10 according to the present embodiment further includes a sealing member 300 as a component that can be attached to the shank portion 100 instead of the head portion 200. FIG. 4 shows a state in which the sealing member 300 is attached to the shank portion 100 of the head replaceable tool 10 in the center. FIG. 5 shows the shank portion 100 with the sealing member 300 attached as a perspective view.

後に説明するように、封止部材３００は、その一部が取付穴１０２の内側へと挿入され、固定螺子１２０の締め付けによってシャンク部１００に対し固定される。図４等に示されるように、封止部材３００の残りの部分（具体的には突出部３１０）は、シャンク部１００の外側へと突出している。この突出している部分の形状は、ヘッド部２００に比べると小さい。このため、封止部材３００の周囲において、被削材３０を配置するための空間は十分に確保されている。 As will be described later, a part of the sealing member 300 is inserted into the inside of the mounting hole 102 and fixed to the shank portion 100 by tightening the fixing screw 120. As shown in FIG. 4 and the like, the remaining portion (specifically, the protruding portion 310) of the sealing member 300 protrudes to the outside of the shank portion 100. The shape of this protruding portion is smaller than that of the head portion 200. Therefore, a sufficient space for arranging the work material 30 is secured around the sealing member 300.

図６を参照しながら、封止部材３００の具体的な構成について説明する。図６では、シャンク部１００の取付穴１０２に取り付けられた状態の封止部材３００が示されている。同図に示されるように、封止部材３００の形状は全体が回転体形状となっており、図６において符号「ＡＸ」が付された一点鎖線は、当該回転体形状の回転軸を表している。この回転軸のことを、以下では「回転軸ＡＸ」とも称する。図６のようにシャンク部１００に封止部材３００が取り付けられた状態においては、回転軸ＡＸは、取付穴１０２の中心軸と一致している。 A specific configuration of the sealing member 300 will be described with reference to FIG. FIG. 6 shows the sealing member 300 attached to the attachment hole 102 of the shank portion 100. As shown in the figure, the shape of the sealing member 300 is a rotating body shape as a whole, and the alternate long and short dash line with the symbol "AX" in FIG. 6 represents the rotation axis of the rotating body shape. There is. This rotation axis will also be referred to as "rotation axis AX" below. When the sealing member 300 is attached to the shank portion 100 as shown in FIG. 6, the rotating shaft AX coincides with the central axis of the mounting hole 102.

シャンク部１００に取り付けられた状態の封止部材３００は、その一部が取付穴１０２の内部に挿入された状態となり、残りの部分がシャンク部１００の取付穴１０２から外側へと突出した状態となっている。封止部材３００のうち、ヘッド部２００に換えて取付穴１０２の内部に挿入される部分のことを、以下では「挿入部３２０」とも称する。また、取付穴１０２に挿入部３２０が挿入された状態において、取付穴１０２から外側へと突出する部分のことを、以下では「突出部３１０」とも称する。 A part of the sealing member 300 attached to the shank portion 100 is inserted inside the mounting hole 102, and the remaining portion protrudes outward from the mounting hole 102 of the shank portion 100. It has become. The portion of the sealing member 300 that is inserted into the mounting hole 102 instead of the head portion 200 is hereinafter also referred to as an “insertion portion 320”. Further, a portion that protrudes outward from the mounting hole 102 in a state where the insertion portion 320 is inserted into the mounting hole 102 is hereinafter also referred to as a “protruding portion 310”.

図６において矢印ＡＲで示される方向は、取付穴１０２の中心軸の中心軸に沿って、取付穴１０２の奥側（図６では上側）へと向かう方向を表している。封止部材３００の挿入部３２０は、この方向に沿って取付穴１０２の中に挿入される。封止部材３００が取付穴１０２へと挿入される方向のことを、以下では「挿入方向」とも称する。先に述べた回転軸ＡＸはこの挿入方向に沿った軸となっている。 The direction indicated by the arrow AR in FIG. 6 represents a direction toward the inner side (upper side in FIG. 6) of the mounting hole 102 along the central axis of the central axis of the mounting hole 102. The insertion portion 320 of the sealing member 300 is inserted into the mounting hole 102 along this direction. The direction in which the sealing member 300 is inserted into the mounting hole 102 is also referred to as an "insertion direction" below. The rotation axis AX described above is an axis along this insertion direction.

突出部３１０は、封止部材３００を取り付ける際又は取り外す際において、使用者によって把持される部分である。突出部３１０の側面３１２は、回転軸ＡＸに向けて凹状に後退している。このような形状とすることで、封止部材３００を取り付ける作業や取り外す作業を行いやすくなっている。 The protrusion 310 is a portion that is gripped by the user when attaching or detaching the sealing member 300. The side surface 312 of the protrusion 310 is recessed toward the rotation axis AX. Such a shape facilitates the work of attaching and detaching the sealing member 300.

突出部３１０と挿入部３２０との境界となる部分には、第１シール部３５１が設けられている。第１シール部３５１は、取付穴１０２の縁Ｅに対し全周に亘り当接することで、流路１０１の流体が外部へと流出することを防止する部分である。尚、封止部材３００には、流体の流出を防止するために、第１シール部３５１に加えて奥側に第２シール部３５２も設けられているのであるが、これについては後述する。 A first seal portion 351 is provided at a portion serving as a boundary between the protrusion 310 and the insertion portion 320. The first seal portion 351 is a portion that prevents the fluid in the flow path 101 from flowing out by contacting the edge E of the mounting hole 102 over the entire circumference. The sealing member 300 is provided with a second seal portion 352 on the back side in addition to the first seal portion 351 in order to prevent the outflow of the fluid, which will be described later.

第１シール部３５１は、挿入方向に対し垂直に切断した場合における断面の形状が、挿入方向に沿った奥側（第２シール部３５２側）に行くほど小さくなっている。 The shape of the cross section of the first seal portion 351 when cut perpendicular to the insertion direction becomes smaller toward the back side (second seal portion 352 side) along the insertion direction.

第１シール部３５１のうち最も突出部３１０側となる位置における断面の直径は、取付穴１０２の内径よりも大きい。また、第１シール部３５１のうち最も突出部３１０側とは反対側となる位置における断面の直径は、取付穴１０２の内径よりも小さい。このため、第１シール部３５１は、その一部が取付穴１０２の内側へと入り込んだ状態となり、取付穴１０２の縁Ｅに対して全周に亘り当接する。尚、取付穴１０２の縁Ｅには、第１シール部３５１の当接に伴う塑性変形を防止するために、面取りやフィレット丸み等が形成されていてもよい。 The diameter of the cross section of the first seal portion 351 at the position closest to the protruding portion 310 is larger than the inner diameter of the mounting hole 102. Further, the diameter of the cross section of the first seal portion 351 at the position opposite to the protruding portion 310 side is smaller than the inner diameter of the mounting hole 102. Therefore, a part of the first seal portion 351 is in a state of being inserted into the inside of the mounting hole 102, and is in contact with the edge E of the mounting hole 102 over the entire circumference. The edge E of the mounting hole 102 may be chamfered, rounded with a fillet, or the like in order to prevent plastic deformation due to contact with the first seal portion 351.

挿入部３２０は、小径部３２１と、拡大部３２２と、大径部３２３と、小径部３２４と、を有している。小径部３２１は、挿入部３２０のうち最も突出部３１０側の部分である。小径部３２１は、その全体が円柱形状となっている。 The insertion portion 320 has a small diameter portion 321, an enlarged diameter portion 322, a large diameter portion 323, and a small diameter portion 324. The small diameter portion 321 is the portion of the insertion portion 320 on the most protruding portion 310 side. The small diameter portion 321 has a cylindrical shape as a whole.

拡大部３２２は、挿入方向に対し垂直に切断した場合における断面の形状が、挿入方向に沿った奥側（第２シール部３５２側）に行くほど大きくなるように形成された部分である。拡大部３２２が設けられている位置は、挿入方向に沿って第１シール部３５１と第２シール部３５２との間となる位置である。拡大部３２２は、固定螺子１２０の先端が当接する部分となっている。 The enlarged portion 322 is a portion formed so that the shape of the cross section when cut perpendicular to the insertion direction becomes larger toward the inner side (second seal portion 352 side) along the insertion direction. The position where the enlarged portion 322 is provided is a position between the first seal portion 351 and the second seal portion 352 along the insertion direction. The enlarged portion 322 is a portion where the tip of the fixed screw 120 comes into contact with the enlarged portion 322.

尚、図６の断面は、固定螺子１２０が設けられた部分とは異なる断面なのであるが、側面側から拡大部３２２に当たる固定螺子１２０の様子が、図６では参考のために点線ＤＬ２で示されている。固定螺子１２０が締め付けられ、固定螺子１２０の先端が拡大部３２２に押し付けられると、挿入部３２０は、挿入方向に沿って奥側に向かうような力を受ける。これにより、第１シール部３５１が取付穴１０２の縁Ｅに押し付けられ、取付穴１０２の内部空間が密閉される。 Although the cross section of FIG. 6 is different from the portion where the fixed screw 120 is provided, the state of the fixed screw 120 that hits the enlarged portion 322 from the side surface side is shown by the dotted line DL2 in FIG. 6 for reference. ing. When the fixed screw 120 is tightened and the tip of the fixed screw 120 is pressed against the enlarged portion 322, the insertion portion 320 receives a force toward the back side along the insertion direction. As a result, the first seal portion 351 is pressed against the edge E of the mounting hole 102, and the internal space of the mounting hole 102 is sealed.

大径部３２３は、拡大部３２２のうち挿入方向に沿った奥側の端部から、更に奥側に向かって伸びるように形成された円柱形状の部分である。大径部３２３の外径は、小径部３２１の外径よりも大きい。 The large-diameter portion 323 is a cylindrical portion of the enlarged portion 322 formed so as to extend further toward the back side from the end portion on the back side along the insertion direction. The outer diameter of the large diameter portion 323 is larger than the outer diameter of the small diameter portion 321.

本実施形態では、流路１０１の内径よりも、取付穴１０２の内径の方が大きくなっている。このため、流路１０１と取付穴１０２との境界部分においては、取付穴１０２の中心軸に対し垂直な段差面１０６が形成されている。 In this embodiment, the inner diameter of the mounting hole 102 is larger than the inner diameter of the flow path 101. Therefore, at the boundary portion between the flow path 101 and the mounting hole 102, a stepped surface 106 perpendicular to the central axis of the mounting hole 102 is formed.

大径部３２３の外径は、流路１０１の内径よりも大きく、且つ取付穴１０２の内径よりも小さい。大径部３２３のうち挿入方向に沿った奥側の端面３２５は、上記の段差面１０６と対向している。 The outer diameter of the large diameter portion 323 is larger than the inner diameter of the flow path 101 and smaller than the inner diameter of the mounting hole 102. The end surface 325 on the back side of the large diameter portion 323 along the insertion direction faces the stepped surface 106.

小径部３２４は、端面３２５から、更に奥側に向かって伸びるように形成された円柱形状の部分である。小径部３２４の外径は、大径部３２３の外径よりも小さく、流路１０１の内径よりも小さい。 The small diameter portion 324 is a cylindrical portion formed so as to extend further toward the back side from the end face 325. The outer diameter of the small diameter portion 324 is smaller than the outer diameter of the large diameter portion 323 and smaller than the inner diameter of the flow path 101.

小径部３２４の周囲には、端面３２５に沿って第２シール部３５２が設けられている。第２シール部３５２は、挿入部３２０の一部である小径部３２４に取り付けられた環状の部材であって、所謂「Ｏリング」である。第２シール部３５２は例えば樹脂により形成されている。尚、図６において、第２シール部３５２は、回転軸ＡＸを含む面で切断した場合における断面が描かれている。 A second seal portion 352 is provided around the small diameter portion 324 along the end surface 325. The second seal portion 352 is an annular member attached to the small diameter portion 324 which is a part of the insertion portion 320, and is a so-called “O-ring”. The second seal portion 352 is formed of, for example, a resin. In addition, in FIG. 6, the cross section of the 2nd seal portion 352 is drawn when it is cut on the surface including the rotation axis AX.

第２シール部３５２は、互いに対向する端面３２５と段差面１０６との間に挟み込まれた状態で保持されている。このとき、第２シール部３５２の変形量が所定量となるように、図６における寸法Ｌ１、Ｌ２が設定されている。寸法Ｌ１は、先端面１０５から端面３２５までの距離であり、寸法Ｌ２は、先端面１０５から段差面１０６までの距離である。第２シール部３５２によって、流路１０１と取付穴１０２との間が遮断されるので、流路１０１から流体が流出してしまうことが防止される。 The second seal portion 352 is held in a state of being sandwiched between the end faces 325 facing each other and the stepped surface 106. At this time, the dimensions L1 and L2 in FIG. 6 are set so that the amount of deformation of the second seal portion 352 becomes a predetermined amount. The dimension L1 is the distance from the tip surface 105 to the end surface 325, and the dimension L2 is the distance from the tip surface 105 to the stepped surface 106. Since the second seal portion 352 blocks the space between the flow path 101 and the mounting hole 102, it is possible to prevent the fluid from flowing out from the flow path 101.

このように、先に述べた第１シール部３５１と上記の第２シール部３５２とは、取付穴１０２に挿入部３２０が挿入された状態において、流路１０１からの流体が外部へと流出することを防止するための２重のシール部として機能する。これにより、流体の流出をより確実に防止することが可能となっている。 As described above, in the first seal portion 351 described above and the second seal portion 352 described above, the fluid from the flow path 101 flows out to the outside in a state where the insertion portion 320 is inserted into the mounting hole 102. It functions as a double seal part to prevent this. This makes it possible to more reliably prevent the outflow of the fluid.

図６に示されるように、突出部３１０のうち、最も大きくなっている部分の外径、具体的には、第１シール部３５１との境界部分における外径は、取付穴１０２の内径よりも大きくなっている。その結果として、突出部３１０は、シャンク部１００のうち取付穴１０２の縁Ｅを全周に亘り覆った状態となっている。ここでいう「覆った状態」とは、挿入方向に沿って見た場合において、取付穴１０２の縁Ｅの全体が、突出部３１０の外形の内側に収まっていることをいう。 As shown in FIG. 6, the outer diameter of the largest portion of the protruding portion 310, specifically, the outer diameter at the boundary portion with the first seal portion 351 is larger than the inner diameter of the mounting hole 102. It's getting bigger. As a result, the protruding portion 310 is in a state of covering the entire circumference of the edge E of the mounting hole 102 in the shank portion 100. The "covered state" as used herein means that the entire edge E of the mounting hole 102 is contained inside the outer shape of the protrusion 310 when viewed along the insertion direction.

このような構成により、図４に示される状態で被削材３０の加工が行われる際には、被削材３０の切削点から飛来する切りくずが、取付穴１０２やその周囲に直接到達することがない。このため、取付穴１０２の内面や周囲の形状が擦過により変化したり、その結果としてヘッド部２００の取り付け精度が低下したりすることが防止される。 With such a configuration, when the work material 30 is machined in the state shown in FIG. 4, chips flying from the cutting point of the work material 30 reach the mounting hole 102 and its surroundings directly. Never. Therefore, it is possible to prevent the inner surface and the surrounding shape of the mounting hole 102 from being changed due to scratching, and as a result, the mounting accuracy of the head portion 200 is prevented from being lowered.

尚、このような効果をより確実に奏するために、先端面１０５のうち縁Ｅを外側から囲む環状の範囲において、突出部３１０が先端面１０５に当接するような構成としてもよい In addition, in order to more reliably achieve such an effect, the protrusion 310 may be configured to abut on the tip surface 105 in the annular range surrounding the edge E from the outside of the tip surface 105.

先に述べたように、封止部材３００はその全体が回転体形状となっている。このため、シャンク部１００に対し封止部材３００を取り付ける際には、ヘッド部２００を取り付ける際とは異なり、封止部材３００取付方向を気にする必要は無い。このような構成により、封止部材３００を容易に且つ短時間で取り付けることが可能となっている。 As described above, the sealing member 300 has a rotating body shape as a whole. Therefore, when attaching the sealing member 300 to the shank portion 100, unlike when attaching the head portion 200, it is not necessary to worry about the mounting direction of the sealing member 300. With such a configuration, the sealing member 300 can be easily and quickly attached.

図７には、シャンク部１００に取り付けられた封止部材３００を、挿入方向に沿って下方から見た状態が示されている。同図に示されるように、本実施形態では、封止部材３００の全体の外形がシャンク部１００の外形の内側に収まっている。封止部材３００をこの程度の小型の部材として構成しておくことで、封止部材３００と被削材３０との干渉がより生じにくくなっている。 FIG. 7 shows a state in which the sealing member 300 attached to the shank portion 100 is viewed from below along the insertion direction. As shown in the figure, in the present embodiment, the entire outer shape of the sealing member 300 is contained inside the outer shape of the shank portion 100. By configuring the sealing member 300 as a member as small as this, interference between the sealing member 300 and the work material 30 is less likely to occur.

本実施形態では、突出部３１０を含む全体の形状が回転体形状となっているので、シャンク部１００の突出部１１０に対し、封止部材３００の突出部３１０等が干渉してしまうことが無い。尚、突出部１１０と突出部３１０との干渉が防止できるのであれば、突出部３１０の形状については回転体形状とはなっていない構成であってもよい。ただし、この場合であっても、挿入部３２０の形状は回転体形状とすることが好ましい。 In the present embodiment, since the entire shape including the protruding portion 310 is a rotating body shape, the protruding portion 310 of the sealing member 300 and the like do not interfere with the protruding portion 110 of the shank portion 100. .. As long as the interference between the protruding portion 110 and the protruding portion 310 can be prevented, the shape of the protruding portion 310 may not be the shape of a rotating body. However, even in this case, the shape of the insertion portion 320 is preferably a rotating body shape.

挿入部３２０の形状を回転体形状とすることの、もう一つの利点について説明する。図８には、封止部材３００が斜視図で示されている。尚、図８に示される封止部材３００は、図６に示される封止部材３００と同じものであるが、図６は模式的な図であったため、各部の詳細な形状や寸法等において図６に示されるものとは異なる部分がある。 Another advantage of having the shape of the insertion portion 320 as a rotating body shape will be described. FIG. 8 shows the sealing member 300 in a perspective view. The sealing member 300 shown in FIG. 8 is the same as the sealing member 300 shown in FIG. 6, but since FIG. 6 is a schematic diagram, the detailed shape and dimensions of each part are shown. There is a part different from that shown in 6.

先に述べたように、固定螺子１２０が締め付けられると、固定螺子１２０の先端が拡大部３２２に押し付けられる。図８に示される「ＳＣ」は、固定螺子１２０との摩擦や圧縮量により、拡大部３２２において変形が生じた範囲を表している。 As described above, when the fixed screw 120 is tightened, the tip of the fixed screw 120 is pressed against the enlarged portion 322. “SC” shown in FIG. 8 represents a range in which deformation occurs in the enlarged portion 322 due to friction with the fixed screw 120 and the amount of compression.

仮に、シャンク部１００に封止部材３００が取り付けられる度に、拡大部３２２のうち同じ位置に固定螺子１２０の先端が当たる場合には、拡大部３２２の変形は同じＳＣの部分で繰り返し生じるので、変形量は次第に大きくなる。この場合、固定螺子１２０を締め付けても、封止部材３００をしっかりと固定することができなくなってしまう可能性がある。 If the tip of the fixing screw 120 hits the same position in the enlarged portion 322 every time the sealing member 300 is attached to the shank portion 100, the deformation of the enlarged portion 322 occurs repeatedly in the same SC portion. The amount of deformation gradually increases. In this case, even if the fixing screw 120 is tightened, the sealing member 300 may not be firmly fixed.

しかしながら、本実施形態では、拡大部３２２を含む封止部材３００の全体が回転体形状となっているので、使用者は封止部材３００の向きを気にすることなくシャンク部１００への取り付けを行うこととなる。この場合、拡大部３２２のうち同じ位置に固定螺子１２０の先端が繰り返し当たる可能性は極めて小さく、傷の位置はランダムに分散されるので、上記のような問題は生じ難い。仮に、拡大部３２２の一部において生じた変形が気になるような場合には、次回はその変形している部分に固定螺子１２０の先端が当たらないよう、封止部材３００の向きを調整して取り付けることができる。これにより、拡大部３２２の変形が生じた場合であっても、当該変形の影響を受けることなく、封止部材３００をしっかりと固定することができる。 However, in the present embodiment, since the entire sealing member 300 including the enlarged portion 322 has a rotating body shape, the user can attach the sealing member 300 to the shank portion 100 without worrying about the orientation of the sealing member 300. Will be done. In this case, the possibility that the tip of the fixed screw 120 repeatedly hits the same position in the enlarged portion 322 is extremely small, and the positions of the scratches are randomly dispersed, so that the above-mentioned problem is unlikely to occur. If the deformation that occurs in a part of the enlarged portion 322 is a concern, the orientation of the sealing member 300 is adjusted next time so that the tip of the fixing screw 120 does not hit the deformed portion. Can be attached. As a result, even when the enlarged portion 322 is deformed, the sealing member 300 can be firmly fixed without being affected by the deformation.

図９には、本実施形態の変形例に係る封止部材３００Ａの構成が、図８と同様の斜視図として示されている。この変形例では、小径部３２１が設けられておらず、突出部３１０から奥側へと大径部３２３が伸びているような形状となっている。また、大径部３２３の一部には平坦面３２６が形成されており、平坦面３２６から挿入方向に沿った奥側に隣り合う部分には、傾斜面３２２Ａが設けられている。傾斜面３２２Ａは、本実施形態の拡大部３２２と同様に、固定螺子１２０の先端が当たる面となっている。平坦面３２６及び傾斜面３２２Ａは、図３において一点鎖線２２１で示された範囲と同様に、固定螺子１２０の先端を受け入れる部分である。 FIG. 9 shows the configuration of the sealing member 300A according to the modified example of the present embodiment as a perspective view similar to that of FIG. In this modification, the small diameter portion 321 is not provided, and the shape is such that the large diameter portion 323 extends from the protruding portion 310 to the inner side. Further, a flat surface 326 is formed in a part of the large diameter portion 323, and an inclined surface 322A is provided in a portion adjacent to the back side along the insertion direction from the flat surface 326. The inclined surface 322A is a surface on which the tip of the fixed screw 120 hits, as in the enlarged portion 322 of the present embodiment. The flat surface 326 and the inclined surface 322A are portions that receive the tip of the fixed screw 120, as in the range shown by the alternate long and short dash line 221 in FIG.

この変形例では、挿入部３２０が回転体形状とはなっていないため、固定螺子１２０の先端は常に平坦面３２６に当接することとなる。このため、拡大部３２２の変形は、図９に示される「ＳＣ」の部分で繰り返し生じることとなり、上記のように、封止部材３００をしっかりと固定することができなくなってしまう可能性がある。このような変形例に比べると、本実施形態に係る封止部材３００は、長期間に亘り繰り返し使用することができる。 In this modification, since the insertion portion 320 does not have a rotating body shape, the tip of the fixed screw 120 always comes into contact with the flat surface 326. Therefore, the deformation of the enlarged portion 322 will repeatedly occur in the portion of "SC" shown in FIG. 9, and as described above, the sealing member 300 may not be firmly fixed. .. Compared with such a modification, the sealing member 300 according to the present embodiment can be used repeatedly for a long period of time.

ただし、例えば、傾斜面３２２Ａを含む封止部材３００Ａの全体が、十分な耐久性（具体的には、耐塑性変形性や耐摩耗性）を有する材料で形成されている等の理由により、ＳＣの部分における変形が問題とならない場合には、この比較例のように、挿入部３２０が回転体形状とはなっていない構成を採用してもよい。 However, for example, the entire sealing member 300A including the inclined surface 322A is made of a material having sufficient durability (specifically, plastic deformation resistance and wear resistance). If the deformation in the portion is not a problem, a configuration in which the insertion portion 320 does not have a rotating body shape may be adopted as in this comparative example.

第２実施形態について、図１０を参照しながら説明する。以下では、図６等の第１実施形態と異なる点について主に説明し、第１実施形態と共通する点については適宜説明を省略する。 The second embodiment will be described with reference to FIG. In the following, the points different from the first embodiment shown in FIG. 6 and the like will be mainly described, and the points common to the first embodiment will be omitted as appropriate.

本実施形態に係る封止部材３００では、大径部３２３の外周面に溝Ｇが形成されている。溝Ｇは、大径部３２３の周方向に沿って伸びる環状の溝である。本実施形態における第２シール部３５２は、この溝Ｇに嵌め込まれた状態で保持されている。その結果、第２シール部３５２は、大径部３２３の外周面から外側に向けて突出しており、その先端は、取付穴１０２の内周面に当接している。 In the sealing member 300 according to the present embodiment, a groove G is formed on the outer peripheral surface of the large diameter portion 323. The groove G is an annular groove extending along the circumferential direction of the large diameter portion 323. The second seal portion 352 in the present embodiment is held in a state of being fitted in the groove G. As a result, the second seal portion 352 projects outward from the outer peripheral surface of the large diameter portion 323, and its tip is in contact with the inner peripheral surface of the mounting hole 102.

つまり、図１０のように、取付穴１０２に挿入部３２０が挿入された状態においては、第２シール部３５２は、挿入部３２０の外周面にある溝Ｇと、取付穴１０２の内周面との間に挟み込まれた状態となっている。このような構成においても、流路１０１の流体が、取付穴１０２の方に流出することを防止することができる。 That is, as shown in FIG. 10, when the insertion portion 320 is inserted into the mounting hole 102, the second seal portion 352 has a groove G on the outer peripheral surface of the insertion portion 320 and an inner peripheral surface of the mounting hole 102. It is in a state of being sandwiched between. Even in such a configuration, it is possible to prevent the fluid in the flow path 101 from flowing out toward the mounting hole 102.

また、本実施形態の構成においては、第２シール部３５２の変形量は、溝Ｇの内径と取付穴１０２の内径とによって定まることとなり、図６に示されるような寸法Ｌ１、Ｌ２の影響を受けることが無い。このため、封止部材３００の製造時において許容される寸法公差を拡大し、加工を容易なものとすることができる。 Further, in the configuration of the present embodiment, the amount of deformation of the second seal portion 352 is determined by the inner diameter of the groove G and the inner diameter of the mounting hole 102, and is affected by the dimensions L1 and L2 as shown in FIG. I will not receive it. Therefore, the dimensional tolerance allowed at the time of manufacturing the sealing member 300 can be increased, and the processing can be facilitated.

尚、本実施形態のように第２シール部３５２を配置した場合には、点線ＤＬ２で示される固定螺子１２０からの力を封止部材３００が受けると、封止部材３００は、取付穴１０２の中心軸に対し垂直な方向（図１０では左方向）に沿って僅かに移動することとなる。その結果、第２シール部３５２の変形量が周方向に沿った全体で均一とはならず、局所的にシール性能が低下することが懸念される。 When the second seal portion 352 is arranged as in the present embodiment, when the sealing member 300 receives the force from the fixed screw 120 indicated by the dotted line DL2, the sealing member 300 is placed in the mounting hole 102. It will move slightly along the direction perpendicular to the central axis (to the left in FIG. 10). As a result, the amount of deformation of the second seal portion 352 is not uniform as a whole along the circumferential direction, and there is a concern that the sealing performance may be locally deteriorated.

しかしながら、本実施形態でも第１実施形態と同様に、第１シール部３５１が縁Ｅに対し全周に亘り当接している。このため、固定螺子１２０からの力を封止部材３００が受けたとしても、封止部材３００が上記のように移動することが妨げられることとなり、第２シール部３５２におけるシール性能の低下は無視できる程度に抑制される。 However, also in this embodiment, as in the first embodiment, the first seal portion 351 is in contact with the edge E over the entire circumference. Therefore, even if the sealing member 300 receives the force from the fixed screw 120, the sealing member 300 is prevented from moving as described above, and the deterioration of the sealing performance in the second sealing portion 352 is ignored. It is suppressed to the extent possible.

以上、具体例を参照しつつ本実施形態について説明した。しかし、本開示はこれらの具体例に限定されるものではない。これら具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素およびその配置、条件、形状などは、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。 The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. These specific examples with appropriate design changes by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-mentioned specific examples, its arrangement, conditions, a shape, and the like are not limited to those exemplified, and can be appropriately changed. The combinations of the elements included in each of the above-mentioned specific examples can be appropriately changed as long as there is no technical contradiction.

ＭＴ：自動旋盤、１０：ヘッド交換式工具、１００：シャンク部、２００：ヘッド部、２３０：切削インサート、３００：封止部材、３２０：挿入部、３５１：第１シール部、３５２：第２シール部。 MT: Automatic lathe, 10: Head replaceable tool, 100: Shank part, 200: Head part, 230: Cutting insert, 300: Sealing member, 320: Insert part, 351: 1st seal part, 352: 2nd seal Department.

Claims

A sealing member used for replaceable head tools.
The head replaceable tool has a shank portion gripped by a machine tool and a head portion having a cutting edge and attached to the shank portion, and a flow for supplying a fluid to the cutting edge or its surroundings. The road is formed so as to pass through the inside of each of the shank portion and the head portion.
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided .
Further, a protruding portion that protrudes from the mounting hole to the outside of the shank portion when the insertion portion is inserted into the mounting hole is further provided.
A sealing member in which the side surface of the protruding portion is recessed .

The sealing member according to claim 1, wherein the shape of the insertion portion is a rotating body shape, and the rotating shaft of the rotating body shape is along the insertion direction when the insertion portion is inserted into the mounting hole. ..

In the state where the insertion portion is inserted into the mounting hole,
The protrusion is
The sealing member according to claim 1 , wherein the edge of the mounting hole of the shank portion is covered over the entire circumference.

According to claim 1 or 3 , the entire shape including the protruding portion is a rotating body shape, and the rotating shaft of the rotating body shape is along the insertion direction when the insertion portion is inserted into the mounting hole. The sealing member described.

The seal portion is
The first seal part and
The sealing member according to any one of claims 1 to 4 , further comprising a second seal portion arranged at a position deeper than the first seal portion on the mounting hole.

The sealing member according to claim 5 , wherein the second seal portion is an annular member attached to the insertion portion.

A sealing member used for replaceable head tools.
The head replaceable tool has a shank portion gripped by a machine tool and a head portion having a cutting edge and attached to the shank portion, and a flow for supplying a fluid to the cutting edge or its surroundings. The road is formed so as to pass through the inside of each of the shank portion and the head portion.
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided.
The seal portion is
The first seal part and
Includes a second seal portion located at a position deeper than the first seal portion on the back side of the mounting hole.
The second seal portion is an annular member attached to the insertion portion, and is an annular member.
In the state where the insertion portion is inserted into the mounting hole,
The second seal portion is a sealing member sandwiched between the outer peripheral surface of the insertion portion and the inner peripheral surface of the mounting hole.

A sealing member used for replaceable head tools.
The head replaceable tool has a shank portion gripped by a machine tool and a head portion having a cutting edge and attached to the shank portion, and a flow for supplying a fluid to the cutting edge or its surroundings. The road is formed so as to pass through the inside of each of the shank portion and the head portion.
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided.
The seal portion is
The first seal part and
Includes a second seal portion located at a position deeper than the first seal portion on the back side of the mounting hole.
In the state where the insertion portion is inserted into the mounting hole,
The first seal portion is a sealing member that abuts on the edge of the mounting hole.

The first seal portion is
The sealing member according to claim 8 , wherein the shape of the cross section when cut perpendicularly to the insertion direction becomes smaller toward the second seal portion side.

A sealing member used for replaceable head tools.
The head replaceable tool has a shank portion gripped by a machine tool and a head portion having a cutting edge and attached to the shank portion, and a flow for supplying a fluid to the cutting edge or its surroundings. The road is formed so as to pass through the inside of each of the shank portion and the head portion.
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided.
The seal portion is
The first seal part and
Includes a second seal portion located at a position deeper than the first seal portion on the back side of the mounting hole.
At the position of the insertion portion between the first seal portion and the second seal portion,
A sealing member having an enlarged portion in which the shape of a cross section when cut perpendicular to the insertion direction becomes larger toward the second seal portion side.

When the state in which the insertion portion is inserted into the mounting hole is viewed along the insertion direction,
The sealing member according to any one of claims 1 to 10 , wherein the entire outer shape is contained inside the outer shape of the shank portion.

A part that is gripped by a machine tool and has a shank part to which a head part with a cutting edge can be attached .
A flow path for supplying a fluid to the cutting edge is formed so as to pass through the inside of the shank portion .
Further provided with a sealing member for preventing the fluid from flowing out from the flow path by being attached to the shank portion instead of the head portion .
The sealing member is
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion that prevents the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole.
With the insertion portion inserted into the mounting hole, a protruding portion protruding from the mounting hole to the outside of the shank portion is provided.
A head replaceable tool in which the side surface of the protrusion is recessed .

A part that is gripped by a machine tool and has a shank part to which a head part with a cutting edge can be attached.
A flow path for supplying a fluid to the cutting edge is formed so as to pass through the inside of the shank portion.
Further provided with a sealing member for preventing the fluid from flowing out from the flow path by being attached to the shank portion instead of the head portion.
The sealing member is
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided.
The seal portion is
The first seal part and
Includes a second seal portion located at a position deeper than the first seal portion on the back side of the mounting hole.
The second seal portion is an annular member attached to the insertion portion, and is an annular member.
In the state where the insertion portion is inserted into the mounting hole,
The second seal portion is a head exchangeable tool that is sandwiched between the outer peripheral surface of the insertion portion and the inner peripheral surface of the mounting hole.

A part that is gripped by a machine tool and has a shank part to which a head part with a cutting edge can be attached.
A flow path for supplying a fluid to the cutting edge is formed so as to pass through the inside of the shank portion.
Further provided with a sealing member for preventing the fluid from flowing out from the flow path by being attached to the shank portion instead of the head portion.
The sealing member is
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided.
The seal portion is
The first seal part and
Includes a second seal portion located at a position deeper than the first seal portion on the back side of the mounting hole.
In the state where the insertion portion is inserted into the mounting hole,
The first seal portion is a head replaceable tool that abuts on the edge of the mounting hole.

A part that is gripped by a machine tool and has a shank part to which a head part with a cutting edge can be attached.
A flow path for supplying a fluid to the cutting edge is formed so as to pass through the inside of the shank portion.
Further provided with a sealing member for preventing the fluid from flowing out from the flow path by being attached to the shank portion instead of the head portion.
The sealing member is
An insertion portion to be inserted in place of the head portion and an insertion portion to be inserted in place of the head portion with respect to the mounting hole formed in the shank portion as a hole for inserting the head portion.
A seal portion for preventing the fluid from flowing out from the flow path when the insertion portion is inserted into the mounting hole is provided.
The seal portion is
The first seal part and
Includes a second seal portion located at a position deeper than the first seal portion on the back side of the mounting hole.
At the position of the insertion portion between the first seal portion and the second seal portion,
A head replaceable tool having an enlarged portion in which the shape of a cross section when cut perpendicular to the insertion direction becomes larger toward the second seal portion side.