JP2007196295A - Cutting tool - Google Patents

Cutting tool Download PDF

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Publication number
JP2007196295A
JP2007196295A JP2006014142A JP2006014142A JP2007196295A JP 2007196295 A JP2007196295 A JP 2007196295A JP 2006014142 A JP2006014142 A JP 2006014142A JP 2006014142 A JP2006014142 A JP 2006014142A JP 2007196295 A JP2007196295 A JP 2007196295A
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Japan
Prior art keywords
tool body
hole
tool
cutting
tip
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JP2006014142A
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Japanese (ja)
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Kazuya Fujimori
和也 藤森
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Caterpillar Japan Ltd
Caterpillar Mitsubishi Ltd
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Caterpillar Mitsubishi Ltd
Shin Caterpillar Mitsubishi Ltd
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Priority to JP2006014142A priority Critical patent/JP2007196295A/en
Publication of JP2007196295A publication Critical patent/JP2007196295A/en
Withdrawn legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tool improved in machining rigidity, which prevents bending of a vibration-proof tool in a simple structure. <P>SOLUTION: An axial hole 12 is bored across the substantially full length of a tool body 11 in the longitudinal direction, a cemented carbide bar 13 is inserted in the axial hole 12, and the tip of the cemented carbide bar 13 is engaged with a locking part 14 provided on the tip of the axial hole 12. A threaded hole 16 is provided on the same axis as the axial hole 12, a screw 17 is engaged with the threaded hole 16, and the cemented carbide bar 13 is pressed by the screw 17 in the tool body 11 to generate tensile stress in the tool body 11. Thus, tensile stress is generated in the tool body 11 by bracing force of the cemented carbide bar 13, machining rigidity of the tool body 11 is thereby improved, and a chatter preventive effect and a bending preventive effect are provided to improve machining accuracy. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、芯材を有する切削工具に関する。   The present invention relates to a cutting tool having a core material.

先端に切刃を備えた工具本体の基端から先端に向けて保持穴を穿設し、この保持穴に超硬質材料の中空部材を挿入し、この中空部材の中空部にゲル状のダンパー物質を充填してプラグにより塞ぐとともに、このダンパー物質の内部に冷却油路を形成し、スローアウェイチップの振動を工具本体内に埋め込まれた中空部材およびダンパー物質にて減衰させることで、防振効果を高めるようにした防振切削工具がある(例えば、特許文献1参照)。
特開2002−113603号公報(第3頁、図2)
A holding hole is drilled from the base end of the tool body having a cutting edge at the tip toward the tip, a hollow member made of a super hard material is inserted into the holding hole, and a gel-like damper substance is inserted into the hollow portion of the hollow member. Is filled with a plug and closed with a plug, a cooling oil passage is formed inside the damper material, and the vibration of the throw-away tip is damped by the hollow member embedded in the tool body and the damper material, thereby providing a vibration-proof effect. There is an anti-vibration cutting tool that increases (see, for example, Patent Document 1).
JP 2002-113603 A (Page 3, FIG. 2)

このように、従来は、超硬質材料の中空部材内にゲル状のダンパー物質を封入し、このダンパー物質の内部に冷却油路を形成するようにしているが、このようなものはダンパー物質の成形が簡単でない問題がある。さらに、中空部材やダンパー物質の単なる埋め込み構造だけでは、工具本体の十分な加工剛性や曲がり防止効果を得られない。   As described above, conventionally, a gel-like damper material is sealed in a hollow member made of an ultra-hard material, and a cooling oil passage is formed inside the damper material. There is a problem that molding is not easy. Furthermore, sufficient processing rigidity and a bending prevention effect of the tool body cannot be obtained only with a hollow member or a mere embedding structure of a damper substance.

本発明は、このような点に鑑みなされたもので、簡単な構造で十分な加工剛性や曲がり防止効果が得られる切削工具を提供することを目的とする。   The present invention has been made in view of these points, and an object of the present invention is to provide a cutting tool capable of obtaining sufficient machining rigidity and a bending prevention effect with a simple structure.

請求項1記載の発明は、長尺に形成され長尺方向に沿って軸方向穴が穿設された工具本体と、この工具本体内の軸方向穴に挿入された芯材と、この芯材を工具本体内で押圧して工具本体に引張応力を発生させる押圧体と、工具本体の先端部に取付けられた切刃とを具備した切削工具である。   The invention according to claim 1 is a tool main body formed in a long shape and having an axial hole formed along the longitudinal direction, a core material inserted into the axial hole in the tool main body, and the core material This is a cutting tool comprising a pressing body that presses the inside of the tool body to generate a tensile stress in the tool body, and a cutting blade attached to the tip of the tool body.

請求項2記載の発明は、請求項1記載の切削工具における押圧体を、工具本体の軸方向穴と同軸上に設けられたねじ穴に螺合されたねじとしたものである。   The invention according to claim 2 is the press body in the cutting tool according to claim 1, wherein the pressing body is a screw screwed into a screw hole provided coaxially with the axial hole of the tool body.

請求項3記載の発明は、請求項1または2記載の切削工具における芯材の内部に、切削油を工具本体の先端部に供給する軸方向油孔が穿設され、工具本体の先端部には、芯材の軸方向油孔から供給された切削油を切刃に向けて噴出させる先端部油孔が穿設されたものである。   According to a third aspect of the present invention, an axial oil hole for supplying cutting oil to the tip of the tool main body is formed in the core of the cutting tool according to the first or second aspect, and the tip of the tool main body is drilled. Is provided with a front end oil hole for ejecting the cutting oil supplied from the axial oil hole of the core toward the cutting edge.

請求項1記載の発明によれば、工具本体内の軸方向穴に挿入された芯材を、工具本体内の押圧体により押圧することで、工具本体に芯材の突っ張り力による引張応力を発生させるだけの簡単な構造により、工具本体の加工剛性を十分に向上させ、加工時のびびり防止効果を得ることができ、加工性能を格段に向上できる。さらに、芯材の突っ張り力による工具本体の十分な曲がり防止効果もあるので、加工精度の向上を図れる。   According to the first aspect of the present invention, the core material inserted into the axial hole in the tool body is pressed by the pressing body in the tool body, thereby generating tensile stress due to the tensile force of the core material on the tool body. With a simple structure that only allows the tool body to sufficiently improve the machining rigidity of the tool body, it is possible to obtain the effect of preventing chatter during machining, and the machining performance can be greatly improved. Furthermore, since there is also an effect of preventing sufficient bending of the tool body due to the tension force of the core material, it is possible to improve machining accuracy.

請求項2記載の発明によれば、工具本体内の芯材を、工具本体内のねじ穴に螺合されたねじにより押圧することで工具本体に引張応力を発生させるので、ねじにより工具本体に作用する引張応力を最適なものに調整できる。   According to the invention described in claim 2, since the core material in the tool body is pressed by a screw screwed into a screw hole in the tool body, a tensile stress is generated in the tool body. The applied tensile stress can be adjusted to an optimum value.

請求項3記載の発明によれば、芯材の内部に穿設された軸方向油孔から、工具本体の先端部に穿設された先端部油孔を通して、切刃に切削油を直接供給できるので、切刃を効率良く冷却できる。   According to the third aspect of the present invention, the cutting oil can be directly supplied to the cutting blade from the axial oil hole drilled in the core through the tip oil hole drilled in the tip of the tool body. Therefore, the cutting blade can be cooled efficiently.

以下、本発明を図1乃至図4に示された一実施の形態を参照しながら詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS.

図1は切削工具10を示し、長尺に形成された工具本体11に、長尺方向のほぼ全長にわたって軸方向穴12が穿設され、この工具本体11内の軸方向穴12に、硬度の高い芯材としての超硬バー13が挿入され、この超硬バー13の先端は、軸方向穴12の先端部に設けられた係止部14に係合されている。   FIG. 1 shows a cutting tool 10, which has a long tool body 11 formed with an axial hole 12 over almost the entire length, and the axial hole 12 in the tool main body 11 has a hardness. A carbide bar 13 as a high core material is inserted, and the tip of the carbide bar 13 is engaged with a locking part 14 provided at the tip of the axial hole 12.

図2に示されるように、超硬バー13の内部には、切削油を工具本体11の先端部に供給する軸方向油孔15が2つ穿設されている。超硬バー13は、これらの軸方向油孔15があらかじめ穿設されたドリル用超硬棒材を有効利用すると良い。   As shown in FIG. 2, two axial oil holes 15 for supplying cutting oil to the tip of the tool body 11 are formed in the carbide bar 13. For the carbide bar 13, it is preferable to effectively use a carbide rod for drill in which these axial oil holes 15 are previously drilled.

一方、工具本体11の取付基端部11aには、軸方向穴12と同軸上にねじ穴16が設けられ、このねじ穴16に、超硬バー13を工具本体11内で押圧して工具本体11に引張応力を発生させる押圧体としてのねじ17が螺合されている。このねじ17には、レンチ用の6角穴18および切削油供給孔19が設けられている。   On the other hand, the mounting base end portion 11a of the tool main body 11 is provided with a screw hole 16 coaxially with the axial hole 12, and the carbide bar 13 is pressed into the screw hole 16 in the tool main body 11 within the tool main body 11. A screw 17 serving as a pressing body for generating a tensile stress is engaged with 11. The screw 17 is provided with a hexagonal hole 18 and a cutting oil supply hole 19 for a wrench.

図3に示されるように、工具本体11の先端部には、偏心された切刃取付部11bが設けられ、この切刃取付部11bに切刃21が取付けられている。   As shown in FIG. 3, an eccentric cutting blade mounting portion 11b is provided at the tip of the tool body 11, and a cutting blade 21 is mounted on the cutting blade mounting portion 11b.

この切刃21は、図4に示されるように、工具本体11の切刃取付部11bに設けられたV形断面の切刃嵌着溝22に嵌着され、図1に示されるように、この切刃21から切刃取付部11bに螺入されたねじ23により固定されている。   As shown in FIG. 4, the cutting blade 21 is fitted into a cutting blade fitting groove 22 having a V-shaped cross section provided in the cutting blade mounting portion 11b of the tool body 11, and as shown in FIG. The cutting blade 21 is fixed by a screw 23 screwed into the cutting blade mounting portion 11b.

工具本体11の先端部には、図1に示されるような軸方向孔24が穿設され、この軸方向孔24の先端は盲栓25により閉じられている。さらに、超硬バー13の軸方向油孔15から軸方向孔24に供給された切削油を切刃21に向けて噴出させる先端部油孔26が穿設されている。   An axial hole 24 as shown in FIG. 1 is formed at the tip of the tool body 11, and the tip of the axial hole 24 is closed by a blind plug 25. Further, a tip end oil hole 26 through which cutting oil supplied from the axial oil hole 15 of the carbide bar 13 to the axial hole 24 is ejected toward the cutting edge 21 is formed.

この先端部油孔26は、図3に示されるように軸方向孔24から半径方向に穿設された油孔26aの外端開口を盲栓27により閉じるとともに、この油孔26aに対して交差し切刃21の方向に向って穿設された油孔26bの切刃21とは反対側の端部を盲栓28により閉じることにより形成し、この油孔26bの切刃側の開口部を切削油噴出口29とする。   As shown in FIG. 3, the tip end oil hole 26 closes the outer end opening of the oil hole 26a formed in the radial direction from the axial hole 24 by a blind plug 27 and intersects the oil hole 26a. The oil hole 26b drilled in the direction of the cutting edge 21 is formed by closing the end opposite to the cutting edge 21 with a blind plug 28, and the opening on the cutting edge side of the oil hole 26b is formed. The cutting oil outlet 29 is assumed.

次に、この実施の形態の作用効果を説明する。   Next, the function and effect of this embodiment will be described.

工具本体11内のねじ穴16に螺合されたねじ17の締着力を加減して、このねじ17が工具本体11内の超硬バー13を押圧し、超硬バー13が工具本体11を内部から軸方向に突っ張る力を調整して、工具本体11内に発生する引張応力を最適なものに調整し、防振工具を構成する。   By adjusting the tightening force of the screw 17 screwed into the screw hole 16 in the tool body 11, the screw 17 presses the carbide bar 13 in the tool body 11, and the carbide bar 13 enters the tool body 11 inside. The tension force generated in the tool body 11 is adjusted to an optimum value by adjusting the force of the tool body 11 in the axial direction, thereby constituting a vibration-proof tool.

この切削工具10は、工具本体11の取付基端部11aに取付けられたテーパシャンク(図示せず)などを介して工作機械の主軸にセットされ、図3に示された回転軌跡30を描く切刃21の刃先によりワークの軸穴などの切削加工をする。   The cutting tool 10 is set on the spindle of the machine tool through a taper shank (not shown) attached to the attachment base end portion 11a of the tool body 11, and the cutting tool 10 which draws the rotation locus 30 shown in FIG. Cutting of the shaft hole or the like of the workpiece is performed by the cutting edge of the blade 21.

その際、ねじ穴16から、ねじ17の切削油供給孔19、超硬バー13の軸方向油孔15、先端部の軸方向孔24および先端部油孔26を通して、切刃21に切削油を直接供給し、切刃21を冷却する。   At that time, the cutting oil is supplied to the cutting blade 21 from the screw hole 16 through the cutting oil supply hole 19 of the screw 17, the axial oil hole 15 of the carbide bar 13, the axial hole 24 of the tip, and the oil hole 26 of the tip. Supply directly and cool the cutting blade 21.

工具本体11内の軸方向穴12に挿入された超硬バー13を、工具本体11内のねじ17により押圧することで、工具本体11に超硬バー13の突っ張り力による引張応力を発生させるだけの簡単な構造により、工具本体11の加工剛性を十分に向上させ、加工時のびびり防止効果を得ることができ、加工性能を格段に向上できる。さらに、超硬バー13の突っ張り力による工具本体11の十分な曲がり防止効果もあるので、加工精度の向上を図れる。   By pressing the carbide bar 13 inserted into the axial hole 12 in the tool body 11 with the screw 17 in the tool body 11, only the tensile stress due to the tensile force of the carbide bar 13 is generated in the tool body 11. With this simple structure, the processing rigidity of the tool body 11 can be sufficiently improved, the effect of preventing chatter during processing can be obtained, and the processing performance can be greatly improved. In addition, since the tool body 11 can be sufficiently prevented from being bent by the tensile force of the carbide bar 13, the machining accuracy can be improved.

工具本体11内の超硬バー13を、工具本体11内のねじ穴16に螺合されたねじ17により押圧することで工具本体11に引張応力を発生させるので、ねじ17により工具本体11に作用する引張応力を最適なものに調整できる。   A tensile stress is generated in the tool body 11 by pressing the carbide bar 13 in the tool body 11 with a screw 17 screwed into a screw hole 16 in the tool body 11, so that the screw 17 acts on the tool body 11. The tensile stress to be adjusted can be adjusted to an optimum value.

超硬バー13の内部に穿設された軸方向油孔15から、工具本体11の先端部に穿設された先端部油孔26を通して、切刃21に切削油を直接供給できるので、切刃21を効率良く冷却できる。   Cutting oil can be directly supplied to the cutting blade 21 from the axial oil hole 15 drilled in the carbide bar 13 through the tip oil hole 26 drilled in the tip of the tool body 11. 21 can be cooled efficiently.

本発明に係る切削工具の一実施の形態を示す一部を破断した正面図である。It is the front view which fractured | ruptured one part which shows one Embodiment of the cutting tool which concerns on this invention. 同上工具に用いられた芯材の断面図である。It is sectional drawing of the core material used for the tool same as the above. 同上工具の底面図である。It is a bottom view of a tool same as the above. 図3のIV−IV線断面図である。It is the IV-IV sectional view taken on the line of FIG.

符号の説明Explanation of symbols

11 工具本体
12 軸方向穴
13 芯材としての超硬バー
15 軸方向油孔
16 ねじ穴
17 押圧体としてのねじ
21 切刃
26 先端部油孔
11 Tool body
12 Axial hole
13 Carbide bar as core material
15 Axial oil hole
16 Screw hole
17 Screw as pressing body
21 Cutting blade
26 Tip oil hole

Claims (3)

長尺に形成され長尺方向に沿って軸方向穴が穿設された工具本体と、
この工具本体内の軸方向穴に挿入された芯材と、
この芯材を工具本体内で押圧して工具本体に引張応力を発生させる押圧体と、
工具本体の先端部に取付けられた切刃と
を具備したことを特徴とする切削工具。
A tool body formed in an elongated shape and having an axial hole formed along the longitudinal direction;
A core material inserted into an axial hole in the tool body;
A pressing body that presses the core material in the tool body to generate a tensile stress in the tool body; and
A cutting tool comprising: a cutting blade attached to the tip of the tool body.
押圧体は、工具本体の軸方向穴と同軸上に設けられたねじ穴に螺合されたねじである
ことを特徴とする請求項1記載の切削工具。
The cutting tool according to claim 1, wherein the pressing body is a screw that is screwed into a screw hole that is provided coaxially with an axial hole of the tool body.
芯材は、内部に穿設され切削油を工具本体の先端部に供給する軸方向油孔を備え、
工具本体は、先端部に穿設され芯材の軸方向油孔から供給された切削油を切刃に向けて噴出させる先端部油孔を備えた
ことを特徴とする請求項1または2記載の切削工具。
The core includes an axial oil hole that is drilled inside and supplies cutting oil to the tip of the tool body,
The tool body includes a tip portion oil hole that is drilled in a tip portion and ejects cutting oil supplied from an axial oil hole of the core toward the cutting edge. Cutting tools.
JP2006014142A 2006-01-23 2006-01-23 Cutting tool Withdrawn JP2007196295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006014142A JP2007196295A (en) 2006-01-23 2006-01-23 Cutting tool

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Application Number Priority Date Filing Date Title
JP2006014142A JP2007196295A (en) 2006-01-23 2006-01-23 Cutting tool

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Publication Number Publication Date
JP2007196295A true JP2007196295A (en) 2007-08-09

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ID=38451400

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JP2006014142A Withdrawn JP2007196295A (en) 2006-01-23 2006-01-23 Cutting tool

Country Status (1)

Country Link
JP (1) JP2007196295A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020097068A (en) * 2018-12-17 2020-06-25 三菱日立パワーシステムズ株式会社 Cutting device and cutting method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020097068A (en) * 2018-12-17 2020-06-25 三菱日立パワーシステムズ株式会社 Cutting device and cutting method
JP7271160B2 (en) 2018-12-17 2023-05-11 三菱重工業株式会社 Cutting device and cutting method

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