JP2005022063A - Arbor and rotating tool - Google Patents

Arbor and rotating tool Download PDF

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JP2005022063A
JP2005022063A JP2003270642A JP2003270642A JP2005022063A JP 2005022063 A JP2005022063 A JP 2005022063A JP 2003270642 A JP2003270642 A JP 2003270642A JP 2003270642 A JP2003270642 A JP 2003270642A JP 2005022063 A JP2005022063 A JP 2005022063A
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arbor
rotary tool
inner diameter
fluid
cutting edge
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Satoru Yoshida
悟 吉田
Shiro Yoshioka
史郎 吉岡
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Tungaloy Corp
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Tungaloy Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an arbor and rotating tool which accurately injects fluid to a cutting edge of the rotating tool in high pressure and easily, and is inexpensively manufactured. <P>SOLUTION: The arbor has a shank section 11 gripped by a spindle of a machine tool at its one end, and a mounting projection 13 engaging with the rotating tool 30 at the other end. The mounting projection 13 is provided with an arbor body 10 having an inner diameter section 15 having an engaging part and a fixing member 20 that engages with the engaging part and fixes the rotating tool 30 to the arbor body 10. The arbor body 10 has a fluid feeding hole 17 communicating an end face of the shank section 11 with the inner diameter section 15, and at least one groove 18 in a wall surface of the inner diameter section 15 in the longitudinal direction of the inner diameter section 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば正面フライス、シェルエンドミル、ボーリングカッタ、サイドカッタといった回転工具と、この回転工具を取り付けるためのアーバに関するもので、特にエアーや切削油などを内部供給する機能を備えたものに関する。 The present invention relates to a rotary tool such as a face mill, a shell end mill, a boring cutter, and a side cutter, and an arbor for mounting the rotary tool, and more particularly, to a tool having a function of supplying air, cutting oil, or the like.

従来、切りくずの除去、切れ刃の潤滑、冷却をするためのエアーや切削油(以下、流体という)を回転工具に供給する方法には、以下に列挙するようなものがあった。 Conventionally, methods for supplying air and cutting oil (hereinafter referred to as fluid) for removing chips, lubricating the cutting edge, and cooling to the rotary tool have been listed below.

(1)第1の方法は流体を回転工具(30)の外部から供給する方法である。図6に示すようにポンプ等の流体供給装置から給油管を介して噴射ノズル(50)から切削加工部近傍に適宜に配置し、この噴射ノズル(50)により流体を工具先端部に供給する方法である。 (1) The first method is a method of supplying fluid from the outside of the rotary tool (30). As shown in FIG. 6, a method of appropriately arranging a fluid supply device such as a pump from the injection nozzle (50) through the oil supply pipe in the vicinity of the cutting portion and supplying the fluid to the tool tip by the injection nozzle (50). It is.

(2)第2の方法は流体をアーバの内部を通して供給する方法である。図7に示すようにアーバ本体(10)の軸線(O)方向に沿って該アーバ本体(10)の内部に流体供給穴(17)が設けられている。回転工具(30)を該アーバ本体(10)に固定するためのボルト等の固定部材(20)にも軸線方向に貫通する噴射穴(18a)が設けられている。そして、該アーバ本体(10)に回転工具(30)を装着した状態で、前記流体供給穴(17)と前記噴射穴(18a)とが連通することにより、流体は該アーバ本体(10)に取り付けられた前記固定部材(20)のフランジ部(22)の先端中央部からアーバの軸線(O)方向に向かって噴出される方法である。(例えば、非特許文献1参照) (2) The second method is a method of supplying fluid through the inside of the arbor. As shown in FIG. 7, a fluid supply hole (17) is provided in the arbor body (10) along the axis (O) direction of the arbor body (10). The fixing member (20) such as a bolt for fixing the rotary tool (30) to the arbor body (10) is also provided with an injection hole (18a) penetrating in the axial direction. Then, the fluid supply hole (17) and the injection hole (18a) communicate with each other in a state where the rotary tool (30) is mounted on the arbor body (10), so that fluid flows into the arbor body (10). It is a method of ejecting from the center of the tip of the flange portion (22) of the attached fixing member (20) toward the arbor axis (O). (For example, see Non-Patent Document 1)

(3)第3の方法は流体をアーバ本体とこのアーバに装着した回転工具の内部を通して供給する方法である。図8に示すように該アーバ本体(10)は、シャンク部(11)の小径側端面に開口するプルスタッド取付穴(16a)と、他端面側に回転工具(30)の取付穴(35)に嵌合する取付突起部(13)と、前記取付突起部(13)の端面に開口する内径部(15)とが備えられ、前記プルスタッド取付穴(16a)と前記内径部(15)とに連通する流体経路が設けられる。前記内径部(15)に係合する固定部材(20)は、軸部(21)の軸中心付近に中央穴(18a)が設けられ、その中央穴(18a)から軸部(21)外周面に連通する分岐穴(18b)が中心軸に対して略対称に2本形成される。一方、該回転工具(30)には、取付穴(35)と該回転工具(30)の先端外周部に設けられた切りくずポケット(32)の起立壁とに連通する噴射穴(34)が設けられる。以上の構成により、工作機械の主軸から供給される流体は、アーバ本体(10)と固定部材(20)と回転工具(30)の内部を通って、前記噴射穴(34)から切れ刃(33a)に向かって噴射される。(例えば、非特許文献2参照) (3) The third method is a method of supplying fluid through the arbor body and the inside of the rotary tool attached to the arbor. As shown in FIG. 8, the arbor body (10) includes a pull stud mounting hole (16a) that opens to the end surface on the small diameter side of the shank portion (11), and a mounting hole (35) for the rotary tool (30) on the other end surface side. And an inner diameter portion (15) opened at an end surface of the attachment projection portion (13), the pull stud attachment hole (16a) and the inner diameter portion (15) A fluid path in communication with is provided. The fixing member (20) engaged with the inner diameter portion (15) is provided with a central hole (18a) in the vicinity of the axial center of the shaft portion (21), and the outer peripheral surface of the shaft portion (21) from the central hole (18a). Two branch holes (18b) communicating with each other are formed substantially symmetrically with respect to the central axis. On the other hand, the rotary tool (30) has an injection hole (34) communicating with the mounting hole (35) and the standing wall of the chip pocket (32) provided at the outer periphery of the tip of the rotary tool (30). Provided. With the above configuration, the fluid supplied from the main spindle of the machine tool passes through the arbor main body (10), the fixing member (20), and the rotary tool (30), and from the injection hole (34) to the cutting blade (33a). ) (For example, see Non-Patent Document 2)

(4)第4の方法は第3の方法と同様に流体をアーバ本体とこのアーバ本体に装着した回転工具の内部を通して供給する方法である。図10に示すように該アーバ本体(10)は、取付基準面(12b)に周方向に設けられた該回転工具(30)の基端面(31)との間で流体中継室(40)を形成する凹溝と、該アーバ本体(10)の基端側の端面(12a)から前記流体中継室(40)に連通する流体供給穴(17)とを備え、前記取付基準面(12b)に該回転工具(30)の基端面(31)を密着させ噴射穴(34)を前記流体中継室(40)に開口させた状態で該回転工具(30)を取付け、流体を内部供給する方法である。(例えば、特許文献1参照)
日立ツール株式会社、CUTTING TOOLS 商品カタログ、2002年9月発行、71頁 三菱マテリアル株式会社、ダイヤチタニットニュースLJ410、2002年10月発行 実開平7−15241号公報(第2頁、図1)
(4) The fourth method is a method of supplying fluid through the inside of the arbor main body and the rotary tool attached to the arbor main body as in the third method. As shown in FIG. 10, the arbor body (10) has a fluid relay chamber (40) between the base end surface (31) of the rotary tool (30) provided in the circumferential direction on the attachment reference surface (12b). A concave groove to be formed; and a fluid supply hole (17) communicating with the fluid relay chamber (40) from an end surface (12a) on the base end side of the arbor body (10); and the mounting reference surface (12b). By attaching the rotary tool (30) in a state where the base end face (31) of the rotary tool (30) is in close contact and the injection hole (34) is opened in the fluid relay chamber (40), the fluid is supplied internally. is there. (For example, see Patent Document 1)
Hitachi Tool Co., Ltd., CUTTING TOOLS product catalog, September 2002, page 71 Mitsubishi Materials Corporation, Dia Tita Knit News LJ410, published in October 2002 Japanese Utility Model Publication No. 7-15241 (2nd page, FIG. 1)

従来技術の(1)項に述べた流体の供給方法は、外径の大きい回転工具(30)では、切削部全体に流体を噴射させるのは困難である。また、回転工具(30)の送り方向の変化や回転工具(30)の外径や全長の変化に伴い流体の供給位置に変化が生じた場合、流体を切れ刃(33a)に向けて正確に噴射することが困難であった。流体を上記切れ刃(33a)に向けて正確に噴射させようとすると、その都度ノズル(50)の向きを調整する作業が必要だが、その作業が非常に煩雑となる。あるいは、無人加工においては、ノズル(50)の位置をその都度切れ刃(33a)に合わせることができないので、切りくずは除去されず上記切れ刃(33a)と被削材との間に噛み込まれ、加工面の傷付き、上記切れ刃(33a)の欠損といった問題があった。 In the fluid supply method described in the section (1) of the prior art, it is difficult for the rotary tool (30) having a large outer diameter to inject the fluid over the entire cutting portion. In addition, when a change occurs in the fluid supply position due to a change in the feed direction of the rotary tool (30) or a change in the outer diameter or overall length of the rotary tool (30), the fluid is accurately directed toward the cutting edge (33a). It was difficult to spray. If the fluid is to be accurately ejected toward the cutting edge (33a), it is necessary to adjust the direction of the nozzle (50) each time, but this operation becomes very complicated. Alternatively, in unmanned machining, the position of the nozzle (50) cannot be adjusted to the cutting edge (33a) each time, so that chips are not removed and are caught between the cutting edge (33a) and the work material. There were problems such as scratches on the machined surface and chipping of the cutting edge (33a).

従来技術の(2)項に述べた流体の供給方法においても、切れ刃(33a)に向けて噴射するのが、切れ刃(33a)近傍の切りくずが完全に除去されないため、上記切れ刃(33a)と被削材との間に噛み込まれ、加工面の傷や上記切れ刃(33a)の欠損といった問題があった。 In the fluid supply method described in the section (2) of the prior art, since the chips near the cutting edge (33a) are not completely removed, the cutting edge (33a) is ejected. 33a) and the work material, there were problems such as scratches on the machined surface and chipping of the cutting edge (33a).

従来技術の(3)項に述べた流体の供給方法は、すべての切れ刃(33a)に向けて正確に流体を供給できる。しかしながら、固定部材(20)の軸中心付近に設けられる中央穴(18a)、または、分岐穴(18b)の断面積は、固定部材(20)の軸部(21)外径の制約を受け十分な断面積を確保できない。したがって、中央穴(18a)または分岐穴(18b)の断面積は、回転工具(30)に設けられる噴射口(34)の総面積より小さくなり、中央穴(18a)または分岐穴(18b)の圧損により切れ刃(33a)へ供給される流体の圧力が低下してしまう。そのため、切りくずは確実に除去されず、上記切れ刃(33a)と被削材との間に噛み込まれ、加工面を傷付けるか、または上記切れ刃(33a)を欠損させてしまうという問題があった。仮に上記切れ刃(33a)に噴射する流体の圧力を高めるため、固定部材(20)内部に設けた中央穴(18a)または分岐穴(18b)の断面積を増加すると、固定部材(30)の軸部(21)の強度低下を招き、回転工具(30)の保持力が不足したり、上記軸部(21)が破損したりするおそれがある。 The fluid supply method described in the section (3) of the prior art can accurately supply the fluid toward all the cutting edges (33a). However, the cross-sectional area of the central hole (18a) or the branch hole (18b) provided near the axial center of the fixing member (20) is sufficiently limited by the outer diameter of the axial portion (21) of the fixing member (20). A sufficient cross-sectional area cannot be secured. Therefore, the cross-sectional area of the center hole (18a) or the branch hole (18b) is smaller than the total area of the injection port (34) provided in the rotary tool (30), and the center hole (18a) or the branch hole (18b) The pressure of the fluid supplied to the cutting edge (33a) is reduced due to the pressure loss. For this reason, the chips are not reliably removed and are caught between the cutting edge (33a) and the work material, and there is a problem that the processing surface is damaged or the cutting edge (33a) is lost. It was. If the cross-sectional area of the central hole (18a) or the branch hole (18b) provided in the fixing member (20) is increased in order to increase the pressure of the fluid sprayed to the cutting edge (33a), the fixing member (30) There is a risk that the strength of the shaft portion (21) is reduced, the holding force of the rotary tool (30) is insufficient, and the shaft portion (21) is damaged.

従来技術の(4)項に述べた流体の供給方法は、すべての切れ刃(33a)に向けて正確に流体を供給でき、固定部材(20)の軸部(21)の強度低下もなく、回転工具(30)の保持力が不足すること、上記軸部(21)の破損といったトラブルが生じることがない。しかしながら、アーバ本体(10)内部には中央部から枝分かれする流体供給穴(17)および流体中継室(40)の加工が加わるため、加工コストの上昇、加工時間の増加を招いてしまう。 The fluid supply method described in the section (4) of the prior art can accurately supply the fluid toward all the cutting edges (33a), and the strength of the shaft portion (21) of the fixing member (20) is not reduced. Problems such as insufficient holding force of the rotary tool (30) and breakage of the shaft (21) do not occur. However, since processing of the fluid supply hole (17) and the fluid relay chamber (40) branching from the central part is added to the inside of the arbor body (10), the processing cost increases and the processing time increases.

本発明は、上述した問題に鑑みなされたものであり、その目的は、回転工具の切れ刃に正確且つ高い圧力で流体を噴射することができるとともに、容易且つ安価に製造することができるアーバおよび回転工具を提供することにある。 The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an arbor capable of ejecting a fluid to a cutting blade of a rotary tool accurately and with high pressure and easily and inexpensively. It is to provide a rotating tool.

上記課題を解決して、このような目的を達成するために、本発明のアーバは、一端部には工作機械の主軸に把持されるシャンク部を備え、他端部には回転工具に嵌合する取付突起部を備え且つ前記取付突起部には係合部を形成した内径部を備えたアーバ本体と、前記係合部に係合し前記回転工具を該アーバ本体に固定する固定部材とを備えたアーバにおいて、該アーバ本体には前記シャンク部の端面と前記内径部とを連通する流体供給穴を設け且つ前記内径部の長手方向に沿って前記内径部の壁面に少なくとも1つの溝を設けたことを特徴とするアーバである。 In order to solve the above-described problems and achieve such an object, the arbor of the present invention has a shank portion gripped by a spindle of a machine tool at one end portion and is fitted to a rotary tool at the other end portion. An arbor body having an inner diameter portion in which an engagement portion is formed on the attachment projection, and a fixing member that engages with the engagement portion and fixes the rotary tool to the arbor body. In the arbor provided, the arbor body is provided with a fluid supply hole for communicating the end face of the shank part and the inner diameter part, and at least one groove is provided in the wall surface of the inner diameter part along the longitudinal direction of the inner diameter part. Arbor that is characterized by that.

また、上述したアーバに固定する回転工具において、該回転工具の中央部には軸線(O)方向に沿って該アーバ本体の取付突起部に嵌合する取付穴を有し、該回転工具の先端外周部には外周面から突出する切れ刃を少なくとも1つ備え、さらに、前記取付穴に開口し且つ前記切れ刃に近接するとともに前記切れ刃方向に向く流体噴射穴を該回転工具の内部に設けたことを特徴とする回転工具である。 Further, in the rotary tool fixed to the arbor described above, a central portion of the rotary tool has a mounting hole that fits into a mounting projection of the arbor body along the axis (O) direction, and the tip of the rotary tool The outer peripheral portion is provided with at least one cutting edge protruding from the outer peripheral surface, and further provided with a fluid injection hole that opens in the mounting hole and is close to the cutting edge and directed toward the cutting edge in the rotary tool. This is a rotary tool characterized by that.

このような構成のアーバおよび回転工具によれば、工作機械の主軸から供給される流体は、該アーバ本体の基端側の端面から、該アーバ本体の内部を経由し、先端側に突設された取付突起部の内径部へ供給される。さらに、該流体は上記内径部の壁面に設けられた溝を経由し、上記取付突起部とこの取付突起部が嵌入する該回転工具の取付穴との空間で形成された流体中継室へ供給される。そして、該流体は、該回転工具の内部に設けられた噴射穴を通り切れ刃方向に向かって噴射される。このように流体は、該アーバおよび該回転工具の内部に設けられた流体経路を通り、流体の供給量の損失がほとんどなく、上記切れ刃に近接した位置から上記切れ刃に向けて正確かつ高い圧力で噴射され、切れ刃近傍の切りくずを完全に除去する。したがって、切れ刃と被削材との間で切りくずを噛み込むことがなく、加工面の傷付き、切れ刃の欠損が防止できる。さらに、切削時の切れ刃および被削材の発熱が抑えられるため、切れ刃寿命が向上し、被削材の熱変形が抑制される。 According to the arbor and the rotary tool having such a configuration, the fluid supplied from the spindle of the machine tool is projected from the end surface on the proximal end side of the arbor body to the distal end side through the inside of the arbor body. Supplied to the inner diameter of the mounting projection. Furthermore, the fluid is supplied to a fluid relay chamber formed in a space between the mounting projection and the mounting hole of the rotary tool into which the mounting projection fits, via a groove provided in the wall surface of the inner diameter portion. The And this fluid is injected toward the cutting-blade direction through the injection hole provided in the inside of this rotary tool. In this way, the fluid passes through the fluid path provided in the arbor and the rotary tool, and there is almost no loss in the amount of fluid supplied, and the fluid is accurate and high from a position close to the cutting edge toward the cutting edge. It is injected with pressure to completely remove chips near the cutting edge. Therefore, chips are not caught between the cutting edge and the work material, and scratches on the processed surface and chipping of the cutting edge can be prevented. Furthermore, since heat generation of the cutting edge and the work material during cutting is suppressed, the life of the cutting edge is improved, and thermal deformation of the work material is suppressed.

固定部材においては、その内部に流体経路を必要としないため、該固定部材は強度低下することなく、回転工具をアーバ本体へ強固に固定することができる。また破損といったトラブルも生じない。さらに、該アーバ本体においては、取付突起部の内径部の壁面に溝加工をするだけのシンプルな構造であるため、従来技術の(3)項および(4)項で述べた従来アーバにくらべ、加工コストおよび加工時間の削減が図られる。 Since the fixing member does not require a fluid path therein, the fixing member can firmly fix the rotary tool to the arbor body without lowering the strength. In addition, troubles such as damage do not occur. Furthermore, since the arbor body has a simple structure in which the wall surface of the inner diameter portion of the mounting projection portion is simply grooved, it is compared with the conventional arbor described in the items (3) and (4) of the prior art, Processing cost and processing time can be reduced.

上述したアーバ本体において、取付突起部の内径部の壁面に設けられる溝の横断面形状は矩形状、円弧状、U字形、V字形のいずれかの形状が好ましい。 In the arbor body described above, the cross-sectional shape of the groove provided on the wall surface of the inner diameter portion of the mounting projection is preferably rectangular, arcuate, U-shaped, or V-shaped.

上記溝は、その横断面形状が上述した形状のいずれかであれば、流体を上記流体中継室へ供給することができる。 If the cross-sectional shape of the groove is any of the shapes described above, fluid can be supplied to the fluid relay chamber.

また、上述したアーバ本体において、取付突起部の内径部の壁面に設けた溝の本数は1〜6本であることが好ましい。 Moreover, in the arbor main body mentioned above, it is preferable that the number of the grooves provided in the wall surface of the inner diameter part of the attachment protrusion is 1 to 6.

これは、上記溝の本数が6本より多いと、取付突起部の内径部と固定部材との係合が不十分となるため、該回転工具を該アーバ本体へ固定する力が著しく低下したり上記内径部が破損したりするからである。 This is because if the number of the grooves is more than 6, the engagement between the inner diameter portion of the mounting projection and the fixing member becomes insufficient, so that the force for fixing the rotary tool to the arbor body is significantly reduced. This is because the inner diameter portion is damaged.

上述した回転工具において、上記流体噴射穴を該回転工具に設けた切れ刃および切りくずポケットと同数設けていることが好ましい。 In the rotary tool described above, it is preferable that the same number of the fluid injection holes as the cutting blades and chip pockets provided in the rotary tool are provided.

そうすれば、流体は該回転工具に設けられた切れ刃全てに正確且つ高い圧力で噴射されるため、切りくずの除去効果が極めて高くなる。 If it does so, since the fluid will be injected to all the cutting edges provided in this rotary tool correctly and with high pressure, the chip removal effect will become very high.

上述したアーバおよび回転工具において、アーバ本体に設けた流体供給穴の断面積をS1、取付突起部の内径部の壁面に設けた溝の総断面積をS2とし、該回転工具に設けた噴射穴の総断面積をS3としたとき、S1≧S2≧S3の関係にあることが好ましい。 In the arbor and rotary tool described above, the cross-sectional area of the fluid supply hole provided in the arbor body is S1, and the total cross-sectional area of the groove provided in the inner wall surface of the mounting projection is S2, and the injection hole provided in the rotary tool It is preferable that S1 ≧ S2 ≧ S3.

このような構成とすれば、流体経路は上流から下流へいくにしたがって断面積が同じかまたは小さくなり、切れ刃への流体噴射速度が上げられる。しかし、上記S1に対して上記S3が極端に小さい場合には、流体の圧力損失が増えることになるので、主軸から供給される流体の圧力を高める必要があるので好ましくない。 With this configuration, the fluid path has the same or smaller cross-sectional area as it goes from upstream to downstream, and the fluid ejection speed to the cutting edge is increased. However, when S3 is extremely small compared to S1, the pressure loss of the fluid increases, which is not preferable because it is necessary to increase the pressure of the fluid supplied from the main shaft.

次に、本発明の実施の形態について、図1乃至図4を参照しながら説明する。図1(a)はアーバ本体の正面図、(b)は回転工具の正面図、(c)は固定部材の正面図である。図2は図1に示すアーバおよびこのアーバに固定した回転工具の断面正面図である。図3は図2に示すアーバおよびこのアーバに固定した回転工具の要部断面正面図である。図4(a)は図1に示す回転工具の正面図であり、(b)は先端視側面図である。図5(a)乃至(f)は図1に示すアーバ本体の取付突起部の内径部に設けた溝の横断面形状を示す図である。 Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1A is a front view of an arbor body, FIG. 1B is a front view of a rotary tool, and FIG. 1C is a front view of a fixing member. 2 is a cross-sectional front view of the arbor shown in FIG. 1 and a rotary tool fixed to the arbor. FIG. 3 is a cross-sectional front view of an essential part of the arbor shown in FIG. 2 and the rotary tool fixed to the arbor. FIG. 4A is a front view of the rotary tool shown in FIG. 1, and FIG. FIGS. 5A to 5F are views showing the cross-sectional shape of the groove provided in the inner diameter portion of the mounting protrusion of the arbor body shown in FIG.

図1に示すように、アーバ本体(10)は、軸線(O)を中心とした回転対称な形状を呈しており、該アーバ本体(10)の基端側には、図示しない工作機械等の主軸に挿入把持されるシャンク部(11)が形成され、このシャンク部(11)の大径側端部にはフランジ部(14)が形成されている。上記シャンク部(11)の小径側端部(12a)には、端面に開口するプルスタッド取付穴(16)と、上記プルスタッド取付穴(16)の内壁に雌ねじ(16a)とが備えられる。そして、この雌ねじ(16a)にプルスタッドボルト(図示しない)が螺着される。このプルスタッドボルトは工作機械の主軸から供給された流体をアーバ本体(10)に供給するために、例えば上記軸線(O)に沿って貫通穴が設けられている。一方、該アーバ本体(10)の先端側端部には回転工具(30)の基端面(31)に当接する取付基準面(12a)とこの取付基準面(12a)から突出する取付突起部(13)とが設けられる。この取付突起部(13)には先端面に開口する内径部(15)と、この内径部(15)の内壁に固定部材(20)に螺合する雌ねじ等の係合部とが形成されている。 As shown in FIG. 1, the arbor body (10) has a rotationally symmetric shape with the axis (O) as the center, and a base of the arbor body (10) includes a machine tool (not shown). A shank portion (11) inserted and held on the main shaft is formed, and a flange portion (14) is formed at the large diameter side end portion of the shank portion (11). The shank portion (11) has a small-diameter end (12a) provided with a pull stud mounting hole (16) that opens to the end surface, and an internal thread (16a) on the inner wall of the pull stud mounting hole (16). Then, a pull stud bolt (not shown) is screwed onto the female screw (16a). The pull stud bolt is provided with a through hole, for example, along the axis (O) in order to supply the fluid supplied from the main shaft of the machine tool to the arbor body (10). On the other hand, the distal end of the arbor body (10) has an attachment reference surface (12a) that contacts the base end surface (31) of the rotary tool (30) and an attachment protrusion (12a) protruding from the attachment reference surface (12a). 13). An inner diameter portion (15) that opens to the front end surface and an engagement portion such as a female screw that is screwed to the fixing member (20) are formed on the inner wall of the inner diameter portion (15). Yes.

該アーバ本体(10)の内部には、上記プルスタッド取付穴(16)と上記内径部(15)とに連通する流体供給穴(17)が軸線(O)に沿って穿設される。さらに、上記内径部(15)の内壁には、少なくとも1つの溝(18)が軸線(O)方向に沿って形成されている。この溝(18)は先端側端部が上記取付突起部(13)の先端側の端面(13a)へ貫通し、且つ、基端側端部が上記内径部(15)に螺合する固定部材(20)の軸部(21)端面よりも基端側へ延びるように形成されている。 A fluid supply hole (17) communicating with the pull stud mounting hole (16) and the inner diameter part (15) is formed in the arbor body (10) along the axis (O). Furthermore, at least one groove (18) is formed along the axis (O) in the inner wall of the inner diameter portion (15). This groove (18) has a distal end side end penetrating to the distal end side end surface (13a) of the mounting projection (13), and a proximal end end portion screwed into the inner diameter portion (15). It is formed so as to extend to the base end side from the end face of the shaft portion (21) of (20).

該アーバ本体(10)に装着される回転工具(30)は図4に示すように、その先端外周部に外周面に沿って切りくずポケット(32)が少なくとも1つ設けられ、この切りくずポケット(32)の該回転工具(30)の回転方向(K)に向く壁面にチップ座が凹設されている。超硬合金などの硬質材料からなるチップ(33)は、その切れ刃(33a)を該回転工具(30)の外周面よりも突出させて、上記チップ座内にねじ等の固定部材によって着脱自在に固定されている。 As shown in FIG. 4, the rotary tool (30) to be mounted on the arbor body (10) is provided with at least one chip pocket (32) along the outer peripheral surface at the outer periphery of the tip, and this chip pocket. A tip seat is recessed on the wall surface of the rotary tool (30) facing the rotation direction (K) of (32). The tip (33) made of a hard material such as cemented carbide is detachable by a fixing member such as a screw in the tip seat with the cutting edge (33a) protruding from the outer peripheral surface of the rotary tool (30). It is fixed to.

該回転工具(30)は基端側の基端面(31)に開口する取付穴(35)と、先端部の先端面に開口する凹部(36)と、上記取付穴(35)と上記凹部(36)に連通する挿通穴(37)とが軸線(O)に沿って設けられる。さらに、該回転工具(30)の内部には、上記取付穴(35)に開口するとともに上記切りくずポケット(32)の起立壁面に開口する噴射穴(34)が形成されている。この噴射穴(34)は、該回転工具(30)の径方向外側に向かって、特に好ましくは切れ刃(33a)に向かって形成されている。 The rotary tool (30) includes a mounting hole (35) that opens to the base end surface (31) on the base end side, a recess (36) that opens to the front end surface of the front end, the mounting hole (35), and the recess ( An insertion hole (37) communicating with 36) is provided along the axis (O). Furthermore, an injection hole (34) is formed in the rotary tool (30) so as to open to the mounting hole (35) and open to the standing wall surface of the chip pocket (32). The injection hole (34) is formed toward the radially outer side of the rotary tool (30), particularly preferably toward the cutting edge (33a).

図2に示すように、該回転工具(30)は、該アーバに固定される場合、上記取付穴(34)が該アーバ本体(10)の取付突起部(13)に嵌合し、上記基端面(31)が該アーバ本体(10)の取付基準面(12b)に当接する。そして、前記挿通穴(37)に挿通した固定部材(20)を上記取付突起部(13)の内径部(15)にねじ込むことにより、該回転工具(30)は上記凹部(36)が上記固定部材(20)のフランジ部(22)に係着されて該アーバに固定される。 As shown in FIG. 2, when the rotary tool (30) is fixed to the arbor, the mounting hole (34) fits into the mounting projection (13) of the arbor body (10), and the base The end surface (31) abuts on the reference mounting surface (12b) of the arbor body (10). Then, by screwing the fixing member (20) inserted through the insertion hole (37) into the inner diameter portion (15) of the mounting projection (13), the concave portion (36) is fixed to the rotary tool (30). The member (20) is engaged with the flange portion (22) and fixed to the arbor.

このように該回転工具(30)を該アーバに固定したとき、該アーバ本体(10)の取付突起部(13)の内径部(15)の内壁に設けられた溝(18)は、流体を遮断しないために、上記内径部に螺合する固定部材(20)の軸部(21)の基端側端部よりも基端側へ延びていなければならない。さらに、該回転工具(30)の噴射穴(34)の取付穴(35)への開口部は、流体を遮断しないために、該アーバ本体(10)の取付突起部(13)が嵌入しない部分、つまり、流体中継室(40)に開口していなければならない。 When the rotary tool (30) is fixed to the arbor in this way, the groove (18) provided on the inner wall of the inner diameter portion (15) of the mounting projection (13) of the arbor body (10) In order not to block, the base end side of the shaft portion (21) of the fixing member (20) screwed into the inner diameter portion must extend to the base end side. Further, the opening to the mounting hole (35) of the injection hole (34) of the rotary tool (30) does not block the fluid, so that the mounting protrusion (13) of the arbor body (10) does not fit into the opening. That is, it must open to the fluid relay chamber (40).

上述した実施形態のアーバおよび回転工具(30)において、図示しない工作機械の主軸から供給された流体は、プルスタッド内部を通り、アーバ本体(10)のプルスタッド取付穴(16)、流体供給穴(17)、取付突起部(13)の内径部(15)の順に供給される。そして、図3の狭いハッチングで示すように上記内径部(15)に設けられた溝(18)を通り、上記取付突起部(13)と該回転工具(30)の取付穴(34)によって形成された流体中継空間(40)へ供給される。その後該回転工具(30)の噴射穴(34)を通り、切りくずポケット(32)の起立壁面の開口部から該回転工具(30)の径方向外側に向かって流体が噴射される。 In the arbor and rotary tool (30) of the embodiment described above, the fluid supplied from the spindle of the machine tool (not shown) passes through the inside of the pull stud, and the pull stud mounting hole (16) and the fluid supply hole of the arbor body (10). (17) and the inner diameter portion (15) of the mounting projection (13). Then, as shown by the narrow hatching in FIG. 3, it is formed by the mounting projection (13) and the mounting hole (34) of the rotary tool (30) through the groove (18) provided in the inner diameter portion (15). Supplied to the fluid relay space (40). Thereafter, the fluid passes through the injection hole (34) of the rotary tool (30), and the fluid is jetted from the opening of the standing wall surface of the chip pocket (32) toward the radially outer side of the rotary tool (30).

このような構成のアーバおよび回転工具によれば、流体は該アーバおよび該回転工具に形成された流体経路からの流体供給量の損失がほとんどなく、回転工具(30)においては、切れ刃(33a)に近接する切りくずポケット(32)の起立壁面から流体を噴射するため、流体は切れ刃(33a)に向かって正確かつ高い圧力で噴射され、上記切れ刃(33a)近傍の切りくずを完全に除去する。したがって、上記切れ刃(33a)と被削材との間で切りくずを噛み込むことがなく、加工面の傷付き、上記切れ刃(33a)の欠損が防止できる。さらに、切削時の上記切れ刃(33a)および被削材の発熱が抑えられるため、上記切れ刃(33a)の寿命が向上し、被削材の熱変形が抑制される。 According to the arbor and the rotary tool having such a configuration, the fluid has almost no loss of the amount of fluid supplied from the fluid path formed in the arbor and the rotary tool. In the rotary tool (30), the cutting edge (33a The fluid is ejected from the standing wall of the chip pocket (32) close to the cutting edge (32), so that the fluid is ejected accurately and with high pressure toward the cutting edge (33a), and the chips near the cutting edge (33a) are completely removed. To remove. Therefore, chips are not caught between the cutting edge (33a) and the work material, and the processing surface can be damaged and the cutting edge (33a) can be prevented from being damaged. Furthermore, since heat generation of the cutting edge (33a) and the work material during cutting is suppressed, the life of the cutting edge (33a) is improved, and thermal deformation of the work material is suppressed.

固定部材(20)においては、その内部に流体通路となる穴等を必要としないため、強度低下することなく、回転工具(30)を該アーバ本体(10)へ強固に固定することができる。また破損といったトラブルも生じない。さらに、アーバ本体(10)においては、前記取付突起部(13)の内径部(15)の壁面に溝加工をするだけのシンプルな構造であるため、加工コストおよび加工時間の削減が図られる。 Since the fixing member (20) does not require a hole or the like serving as a fluid passage in the fixing member (20), the rotary tool (30) can be firmly fixed to the arbor body (10) without lowering the strength. In addition, troubles such as damage do not occur. Furthermore, since the arbor body (10) has a simple structure in which the wall surface of the inner diameter portion (15) of the mounting projection (13) is simply grooved, the processing cost and the processing time can be reduced.

該アーバ本体(10)において、取付突起部(13)の内径部(15)の壁面に設けられる溝(18)の横断面形状は、図5に示すように矩形状、または、円弧状、または、U字形、または、V字形のいずれかの形状が好ましい。これは、上記溝(18)は、その横断面形状が上述した形状のいずれかであれば、上記内径部(15)に流体経路を形成することができるからである。なお、上記溝(18)の横断面形状は、例えばドリルまたはエンドミルのような回転工具で容易に加工できる点で、円弧状またはU字状が特に好ましい。 In the arbor body (10), the cross-sectional shape of the groove (18) provided on the wall surface of the inner diameter portion (15) of the mounting projection (13) is rectangular, arcuate, or as shown in FIG. , U-shaped or V-shaped is preferable. This is because the groove (18) can form a fluid path in the inner diameter portion (15) if the cross-sectional shape thereof is any of the shapes described above. The cross-sectional shape of the groove (18) is particularly preferably an arc shape or a U-shape in that it can be easily processed with a rotary tool such as a drill or an end mill.

また、上記内径部(15)の壁面に設けた溝(18)の本数は1〜6本であることが好ましい。これは、上記溝(18)の本数が6本より多いと、上記内径部(18)と固定部材(20)の軸部(21)との係合が不十分となるため、該回転工具(30)を該アーバ本体(10)へ固定する力が著しく低下したり、上記内径部(15)が破損したりするからである。なお、2本以上の溝を設ける場合、上記内径部の係合部を周方向に均一に確保するため、上記溝は上記内径部の周方向に等角度間隔に設けられるのが好ましい。 Moreover, it is preferable that the number of the groove | channels (18) provided in the wall surface of the said internal diameter part (15) is 1-6. When the number of the grooves (18) is more than 6, the engagement between the inner diameter portion (18) and the shaft portion (21) of the fixing member (20) becomes insufficient. This is because the force for fixing 30) to the arbor body (10) is remarkably reduced or the inner diameter portion (15) is damaged. When two or more grooves are provided, the grooves are preferably provided at equiangular intervals in the circumferential direction of the inner diameter portion in order to ensure the engagement portions of the inner diameter portion in the circumferential direction.

上述した回転工具(30)において、流体噴射穴(34)を切れ刃(33a)および切りくずポケット(32)と同数設けていることが好ましい。そうすれば、流体は該回転工具(30)に設けられた全ての切れ刃(33a)に噴射されるため、切りくずの除去効果が極めて高くなる。 In the rotary tool (30) described above, it is preferable to provide the same number of fluid ejection holes (34) as the cutting edges (33a) and the chip pockets (32). If it does so, since the fluid is injected to all the cutting edges (33a) provided in this rotary tool (30), the chip removal effect will become very high.

上述したアーバおよび回転工具(30)において、該アーバ本体(10)に設けた流体供給穴(17)の断面積をS1、取付突起部(13)の内径部(15)の壁面に設けた溝(18)の総断面積をS2とし、該回転工具(30)に設けた噴射穴(34)の総断面積をS3としたとき、S1≧S2≧S3の関係にあることが好ましい。このような構成とすれば、流体の通る経路は上流から下流へいくにしたがって断面積が同じかまたは小さくなり、切れ刃(33a)への流体噴射速度が上げられる。 In the arbor and rotary tool (30) described above, the cross-sectional area of the fluid supply hole (17) provided in the arbor body (10) is S1, and the groove provided in the wall surface of the inner diameter portion (15) of the mounting projection (13) When the total cross-sectional area of (18) is S2, and the total cross-sectional area of the injection hole (34) provided in the rotary tool (30) is S3, it is preferable that S1 ≧ S2 ≧ S3. With such a configuration, the path through which the fluid passes has the same or smaller cross-sectional area as it goes from upstream to downstream, and the fluid ejection speed to the cutting edge (33a) is increased.

なお、工作機械の主軸に把持されるシャンク部(11)の形状は、上述した実施形態に限定されず、本発明の要旨を逸脱しない範囲において、種々の形状に適用可能である。また、アーバ内部への流体の供給形態についても上述した工作機械の主軸から供給される形態(スピンドルスルータイプ)に限定されず、それ以外の供給形態に適用可能である。 In addition, the shape of the shank part (11) gripped by the spindle of the machine tool is not limited to the above-described embodiment, and can be applied to various shapes without departing from the gist of the present invention. Further, the form of supplying fluid to the inside of the arbor is not limited to the form (spindle-through type) supplied from the spindle of the machine tool described above, and can be applied to other supply forms.

(a)は本発明に係る実施形態のアーバ本体の正面図であり、(b)は本発明に係る実施形態の回転工具の正面図であり、(c)は本発明に係る実施形態の固定部材の正面図である。(A) is a front view of the arbor main body of embodiment which concerns on this invention, (b) is a front view of the rotary tool of embodiment which concerns on this invention, (c) is fixing of embodiment which concerns on this invention It is a front view of a member. 図1に示すアーバおよびこのアーバに固定した回転工具の断面正面図である。It is a cross-sectional front view of the arbor shown in FIG. 1 and the rotary tool fixed to this arbor. 図2に示すアーバおよび回転工具の要部断面正面図である。It is a principal part cross-sectional front view of the arbor and rotary tool shown in FIG. (a)は図1に示す回転工具の正面図であり、(b)は先端視側面図である。(A) is a front view of the rotary tool shown in FIG. 1, (b) is a side view as viewed from the tip. (a)乃至(f)は図1に示すアーバ本体の取付突起部の内径部に設けた溝の横断面形状を示す図である。(A) thru | or (f) is a figure which shows the cross-sectional shape of the groove | channel provided in the internal diameter part of the attachment protrusion part of the arbor main body shown in FIG. 従来の内部給油式アーバおよびこのアーバに固定した回転工具の断面正面図である。It is a cross-sectional front view of the conventional internal oil supply type arbor and the rotary tool fixed to this arbor. (a)は従来の内部給油式アーバおよびこのアーバに固定した回転工具の断面正面図であり、(b)はこのアーバの固定部材の断面正面図である。(A) is a cross-sectional front view of the conventional internal oil supply type arbor and the rotary tool fixed to this arbor, (b) is a cross-sectional front view of the fixing member of this arbor. 従来の内部給油式アーバおよびこのアーバに固定した回転工具の断面正面図である。It is a cross-sectional front view of the conventional internal oil supply type arbor and the rotary tool fixed to this arbor. 従来の内部給油式アーバおよびこのアーバに固定した回転工具の断面正面図である。It is a cross-sectional front view of the conventional internal oil supply type arbor and the rotary tool fixed to this arbor.

符号の説明Explanation of symbols

10 アーバ本体
12b 取付基準面
13 取付突起部
15 内径部
17 流体供給穴
18 溝
20 固定部材
21 軸部
22 フランジ部
30 回転工具
31 基端面
32 切りくずポケット
33 チップ
33a 切れ刃
34 噴射穴
35 取付穴
36 凹部
37 挿通穴
40 流体中継室
10 Arbor body 12b Reference mounting surface 13 Mounting protrusion 15 Inner diameter portion 17 Fluid supply hole 18 Groove 20 Fixing member 21 Shaft portion 22 Flange portion 30 Rotating tool 31 Base end surface 32 Chip pocket 33 Chip 33a Cutting blade 34 Injection hole 35 Mounting hole 36 Concave portion 37 Insertion hole 40 Fluid relay chamber

Claims (6)

一端部には工作機械の主軸に把持されるシャンク部を備え、他端部には回転工具に嵌合する取付突起部を備え且つ前記取付突起部には係合部を形成した内径部を備えたアーバ本体と、前記係合部に係合し前記回転工具を該アーバ本体に固定する固定部材とを備えたアーバにおいて、
該アーバ本体には前記シャンク部の端面と前記内径部とを連通する流体供給穴を設け且つ前記内径部の長手方向に沿って前記内径部の壁面に少なくとも1つの溝を設けたことを特徴とするアーバ。
One end portion is provided with a shank portion that is gripped by the spindle of the machine tool, the other end portion is provided with a mounting projection portion that fits the rotary tool, and the mounting projection portion is provided with an inner diameter portion that forms an engagement portion. In an arbor comprising: an arbor main body; and a fixing member that engages with the engaging portion and fixes the rotary tool to the arbor main body.
The arbor body is provided with a fluid supply hole that communicates the end face of the shank part and the inner diameter part, and at least one groove is provided in the wall surface of the inner diameter part along the longitudinal direction of the inner diameter part. Arbor to do.
前記内径部の壁面に設けた溝の横断面形状を矩形状、または、円弧状、または、U字形、または、V字形のいずれかの形状としたことを特徴とする請求項1に記載のアーバ。 2. The arbor according to claim 1, wherein a cross-sectional shape of the groove provided on the wall surface of the inner diameter portion is a rectangular shape, an arc shape, a U shape, or a V shape. . 前記内径部の壁面に設けた溝の本数を1本以上6本以下としたことを特徴とする請求項1または請求項2に記載のアーバ。 The arbor according to claim 1 or 2, wherein the number of grooves provided on the wall surface of the inner diameter portion is 1 or more and 6 or less. 請求項1乃至請求項3のいずれか1項に記載のアーバに固定する回転工具において、該回転工具の中央部には軸線(O)方向に沿って該アーバ本体の取付突起部に嵌合する取付穴を有し、該回転工具の先端外周部には外周面から突出する切れ刃を少なくとも1つ備え、さらに、前記取付穴に開口するとともに前記切れ刃に近接し且つ前記切れ刃方向に開口する流体噴射穴を該回転工具の内部に設けたことを特徴とする回転工具。 The rotary tool fixed to the arbor according to any one of claims 1 to 3, wherein a central portion of the rotary tool is fitted to a mounting protrusion of the arbor body along the axis (O) direction. There is a mounting hole, and at least one cutting edge protruding from the outer peripheral surface is provided on the outer peripheral portion of the tip of the rotary tool, and further opens in the mounting hole and close to the cutting edge and in the direction of the cutting edge. A rotary tool characterized in that a fluid injection hole is provided inside the rotary tool. 前記流体噴射穴を該回転工具に設けた切れ刃と同数設けたことを特徴とする請求項4に記載の回転工具。 The rotary tool according to claim 4, wherein the number of the fluid ejection holes is the same as the number of cutting edges provided in the rotary tool. 請求項1乃至請求項3のいずれか一項に記載のアーバにおいて、該アーバ本体に設けた流体供給穴の断面積をS1、取付突起部の内径部の壁面に設けた溝の総断面積をS2とし、請求項4または請求項5に記載の回転工具において、該回転工具に設けた噴射穴の総断面積をS3としたとき、S1≧S2≧S3の関係にあることを特徴とする回転工具。 The arbor according to any one of claims 1 to 3, wherein S1 is a cross-sectional area of a fluid supply hole provided in the arbor body, and a total cross-sectional area of a groove provided in a wall surface of an inner diameter portion of the mounting projection part. In the rotary tool according to claim 4 or 5, wherein S2 is the total cross-sectional area of the injection holes provided in the rotary tool, S1 ≧ S2 ≧ S3. tool.
JP2003270642A 2003-07-03 2003-07-03 Arbor and rotating tool Pending JP2005022063A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010188451A (en) * 2009-02-16 2010-09-02 Mitsubishi Materials Corp End mill
JP2013528126A (en) * 2010-06-09 2013-07-08 ケンナメタル インコーポレイテッド Cutting insert with internal coolant delivery and cutting assembly using the same
WO2014187707A1 (en) * 2013-05-22 2014-11-27 Franz Haimer Maschinenbau Kg Tool holder
CN104384589A (en) * 2014-11-18 2015-03-04 江苏汤臣汽车零部件有限公司 Milling cutter for removing shavings and cooling by spraying high pressure water
JP2019524467A (en) * 2016-08-16 2019-09-05 ケンナメタル インコ−ポレイテツド Tool body and cutting tool for shell end mill

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010188451A (en) * 2009-02-16 2010-09-02 Mitsubishi Materials Corp End mill
JP2013528126A (en) * 2010-06-09 2013-07-08 ケンナメタル インコーポレイテッド Cutting insert with internal coolant delivery and cutting assembly using the same
WO2014187707A1 (en) * 2013-05-22 2014-11-27 Franz Haimer Maschinenbau Kg Tool holder
US10058965B2 (en) 2013-05-22 2018-08-28 Franz Haimer Maschinenbau Kg Tool holder
US10525560B2 (en) 2013-05-22 2020-01-07 Franz Haimer Maschinenbau Kg Tool holder
CN104384589A (en) * 2014-11-18 2015-03-04 江苏汤臣汽车零部件有限公司 Milling cutter for removing shavings and cooling by spraying high pressure water
JP2019524467A (en) * 2016-08-16 2019-09-05 ケンナメタル インコ−ポレイテツド Tool body and cutting tool for shell end mill

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