JPH0531616A - End mill for printed wiring board processing - Google Patents

End mill for printed wiring board processing

Info

Publication number
JPH0531616A
JPH0531616A JP3185049A JP18504991A JPH0531616A JP H0531616 A JPH0531616 A JP H0531616A JP 3185049 A JP3185049 A JP 3185049A JP 18504991 A JP18504991 A JP 18504991A JP H0531616 A JPH0531616 A JP H0531616A
Authority
JP
Japan
Prior art keywords
end mill
wiring board
printed wiring
cutting
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3185049A
Other languages
Japanese (ja)
Inventor
Muneisa Yamada
宗勇 山田
Katsuaki Arai
克明 新井
Hideo Nakanishi
秀雄 中西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP3185049A priority Critical patent/JPH0531616A/en
Publication of JPH0531616A publication Critical patent/JPH0531616A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C5/00Milling-cutters
    • B23C5/02Milling-cutters characterised by the shape of the cutter
    • B23C5/10Shank-type cutters, i.e. with an integral shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

PURPOSE:To arrange so that a print wiring plate may be able to be processed cuttingly without generating a warp at surface metal foil. CONSTITUTION:An edge portion 2 is provided at the tip of a shank 1, and at the same time an end mill forming a cutting edge 3 at the ridge line of one side end edge of one side surface of the edge portion 2 is formed. The cutting edge 3 is inclined at an angle that is inclined upward and toward a rotation direction. Cutting can be carried out by conducting such pressing as to press metal foil by means of the inclined cutting edge 3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、プリント配線板の表面
に凹所を座ぐり加工するために用いられるエンドミルに
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end mill used for boring a recess on the surface of a printed wiring board.

【0002】[0002]

【従来の技術】プリント配線板は、銅箔等の金属箔を張
ったガラス基材エポキシ樹脂積層板などガラス基材樹脂
積層板によって作成されており、このようなプリント配
線板を半導体パッケージの基板等として使用する場合、
プリント配線板の表面にはICなどの半導体チップを搭
載するための凹部を座ぐり切削加工して設ける必要があ
る。
2. Description of the Related Art A printed wiring board is made of a glass-based resin laminated board such as a glass-based epoxy resin laminated board on which a metal foil such as a copper foil is stretched. Such a printed wiring board is used as a substrate of a semiconductor package. When used as
On the surface of the printed wiring board, it is necessary to form a recess for mounting a semiconductor chip such as an IC by spot facing cutting.

【0003】そしてこのような凹部を座ぐり切削するた
めの工具として、図4(a)(b)に示すエンドミルA
が使用されている。このエンドミルAはシャンク1の先
端に超硬合金等の刃部2を設けて形成されるものであ
り、NCルーターなどの切削装置の回転軸にシャンク1
を固定して高速回転させつつ高速送りをして、刃部2の
切り刃3でプリント配線板7の表面を切削加工すること
によって、図4(a)(b)に想像線で示すように凹部
8を座ぐり加工することができるものである。
An end mill A shown in FIGS. 4 (a) and 4 (b) is used as a tool for spot-cutting such a recess.
Is used. This end mill A is formed by providing a blade portion 2 made of cemented carbide or the like at the tip of a shank 1, and the shank 1 is attached to the rotary shaft of a cutting device such as an NC router.
Is fastened at a high speed while being fastened, and the surface of the printed wiring board 7 is cut by the cutting blade 3 of the blade portion 2 so that the imaginary line shown in FIGS. The recess 8 can be spot-machined.

【0004】[0004]

【発明が解決しようとする課題】しかしこのようにプリ
ント配線板7の表面を切削加工するにあたって、図5に
示すようにプリント配線板7の表面に張った銅箔等の金
属箔9の切削端縁にカエリ9aが発生し、このカエリ9
aによって短絡不良等が発生するおそれがあるという問
題があった。
However, in cutting the surface of the printed wiring board 7 as described above, the cutting end of the metal foil 9 such as a copper foil stretched on the surface of the printed wiring board 7 as shown in FIG. The burrs 9a are generated on the edges, and the burrs 9a
There is a problem that short circuit failure or the like may occur due to a.

【0005】本発明は上記の点に鑑みてなされたもので
あり、表面の金属箔にカエリが発生することなく切削加
工することができるプリント配線板加工用エンドミルを
提供することを目的とするものである。
The present invention has been made in view of the above points, and an object of the present invention is to provide an end mill for processing a printed wiring board which can be cut without causing burrs on the metal foil on the surface. Is.

【0006】[0006]

【課題を解決するための手段】本発明に係るプリント配
線板加工用エンドミルは、シャンク1の先端に刃部2を
設けると共に刃部2の一側面の一方の側端縁の稜線に切
り刃3を形成したエンドミルにおいて、切り刃3を回転
方向に向けて上り傾斜する角度で傾斜させて成ることを
特徴とするものである。
In the end mill for processing a printed wiring board according to the present invention, a blade portion 2 is provided at the tip of a shank 1, and a cutting blade 3 is provided on a ridge line on one side edge of one side surface of the blade portion 2. In the end mill having the above-mentioned structure, the cutting blade 3 is inclined at an angle which is inclined upward in the rotation direction.

【0007】[0007]

【作用】切り刃3を回転方向に向けて上り傾斜する角度
で傾斜させることによって、切り刃3でプリント配線板
7及びその表面の金属箔9を切削する際に、傾斜する切
り刃3で金属箔9を押さえるようにしながら金属箔9を
切削することができる。
By tilting the cutting blade 3 in the direction of rotation so as to incline upward, when the cutting wiring 3 cuts the printed wiring board 7 and the metal foil 9 on the surface of the printed wiring board 7, the cutting blade 3 tilts. The metal foil 9 can be cut while pressing the foil 9.

【0008】[0008]

【実施例】以下本発明を実施例によって詳述する。図1
は本発明の一実施例を示すものであり、シャンク1の先
端に刃部2をろう付け等で取り付けてエンドミルAを形
成するようにしてある。刃部2は一般に超硬合金で作成
されるが、プリント配線板7としてガラス布基材のもの
を用いる場合、超硬合金はガラスを切削する際に磨耗が
著しく生じるおそれがある。このために刃部2としては
(少なくとも刃部2の切り刃3は)耐磨耗性が良好なダ
イヤモンド粉末焼結体で作成したものを用いるのが好ま
しい。ダイヤモンド粉末焼結体はダイヤモンドの微粉末
を硬質粒子として超高圧で焼結したものであり、ダイヤ
モンドコンパックスと通称されるものである。
EXAMPLES The present invention will be described in detail below with reference to examples. Figure 1
Shows an embodiment of the present invention, in which the blade 2 is attached to the tip of the shank 1 by brazing or the like to form the end mill A. The blade 2 is generally made of cemented carbide, but when a glass cloth base material is used as the printed wiring board 7, the cemented carbide may be significantly worn when the glass is cut. For this reason, it is preferable to use the blade portion 2 (at least the cutting blade 3 of the blade portion 2) made of a diamond powder sintered body having good wear resistance. The diamond powder sintered body is obtained by sintering fine diamond powder as hard particles at ultrahigh pressure, and is commonly called diamond compax.

【0009】この刃部2は、平面として形成される前面
2aと、円弧面として形成される側背面2bと、やや傾
斜する平面として形成される底面2cを具備して構成さ
れるものであり、刃部2の一側の下部には切欠部10を
設けるようにしてある。この刃部2において前面2aの
切欠部10を設けた側と反対側の側端縁の稜線が切り刃
3として形成されるものであり、図1(c)にエンドミ
ルAの中心軸Oを回転中心とするこの切り刃3の回転軌
跡rを示すように、座ぐり加工する際にはこの切り刃3
で凹部8の側面を切削することができる。また刃部2の
前面2aの下端縁も下端切り刃11として形成されるも
のであり、座ぐり加工する際にはこの下端切り刃11で
凹部8の底面を切削することができる。そして、刃部2
の前面2aはエンドミルAの中心軸Oに対して負のすく
い角αが形成されるように傾斜させてあり、この前面2
aの側端縁に形成される切り刃3が回転方向に向けて上
り傾斜する角度で傾斜されるようにしてある。上記負の
すくい角αは0.5°〜10°の範囲が好ましい。
The blade portion 2 has a front surface 2a formed as a flat surface, a side rear surface 2b formed as an arc surface, and a bottom surface 2c formed as a slightly inclined flat surface. A notch 10 is provided on the lower part of one side of the blade 2. A ridge line of a side edge of the blade portion 2 opposite to the side where the cutout portion 10 of the front surface 2a is provided is formed as a cutting blade 3, and the central axis O of the end mill A is rotated in FIG. As shown by the rotation locus r of the cutting blade 3 as the center, when the counter boring is performed, the cutting blade 3
Thus, the side surface of the recess 8 can be cut. Further, the lower end edge of the front surface 2a of the blade portion 2 is also formed as the lower end cutting blade 11, and the bottom surface of the recess 8 can be cut by the lower end cutting blade 11 when performing the spot facing process. And the blade 2
Of the front surface 2a of the end mill A is inclined so as to form a negative rake angle α with respect to the central axis O of the end mill A.
The cutting edge 3 formed on the side edge of a is inclined at an angle that is inclined upward in the rotational direction. The negative rake angle α is preferably in the range of 0.5 ° to 10 °.

【0010】上記のように作成されるエンドミルAをN
Cルーターなどの切削装置の回転軸にシャンク1を固定
して取付け、中心軸Oを中心にエンドミルAを高速回転
させつつ高速送りをすることによって、表面に銅箔等の
金属箔9を張ったプリント配線板7に凹部8を図2のよ
うに座ぐり加工するにあたって、図3にベクトルの矢印
で示すように、切り刃3でプリント配線板7及びその表
面の金属箔9を切削する際に、傾斜する切り刃3によっ
て金属箔9の切削端縁を押さえ付ける力が働き、金属箔
9の切削端縁に図5のようなカエリ9aが発生すること
を防ぐことができるものであり、従ってエンドミルAの
交換期間を長くして長寿命化を図ることができるもので
ある。
The end mill A produced as described above is
The shank 1 is fixedly attached to the rotary shaft of a cutting device such as a C router, and the end mill A is rotated at a high speed around the central axis O to perform high-speed feeding, whereby a metal foil 9 such as a copper foil is stretched on the surface. When the recess 8 is counterbored in the printed wiring board 7 as shown in FIG. 2, when the printed wiring board 7 and the metal foil 9 on the surface thereof are cut by the cutting blade 3 as shown by the vector arrow in FIG. The inclined cutting blade 3 exerts a force to press the cutting edge of the metal foil 9 to prevent the burrs 9a as shown in FIG. It is possible to extend the replacement period of the end mill A to extend the service life.

【0011】[0011]

【発明の効果】上記のように本発明は、シャンクの先端
に刃部を設けると共に刃部の一側面の一方の側端縁の稜
線に切り刃を形成したエンドミルにおいて、切り刃を回
転方向に向けて上り傾斜する角度で傾斜させたので、切
り刃でプリント配線板及びその表面の金属箔を切削する
際に、傾斜する切り刃で金属箔を押さえるようにしなが
ら金属箔を切削することができるものであり、金属箔の
切削端縁にカエリが発生することを防ぐことができるも
のである。
As described above, according to the present invention, in the end mill in which the blade portion is provided at the tip of the shank and the blade is formed on the ridge line of one side edge of one side surface of the blade portion, the blade is arranged in the rotating direction. Since it is inclined at an angle that inclines upward, when cutting the printed wiring board and the metal foil on its surface with the cutting blade, the metal foil can be cut while pressing the metal foil with the inclined cutting blade. It is possible to prevent the occurrence of burrs on the cutting edge of the metal foil.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示すものであり、(a)は
一部の正面図、(b)は一部の側面図、(c)はイ−イ
線断面図である。
1A and 1B show an embodiment of the present invention, in which FIG. 1A is a partial front view, FIG. 1B is a partial side view, and FIG.

【図2】同上の切削の作業を示す斜視図である。FIG. 2 is a perspective view showing a cutting operation of the above.

【図3】同上の切削の作業を示す拡大した断面図であ
る。
FIG. 3 is an enlarged cross-sectional view showing a cutting operation of the above.

【図4】従来例を示すものであり、(a)は正面図、
(b)は側面図である。
FIG. 4 shows a conventional example, (a) is a front view,
(B) is a side view.

【図5】従来の問題点を示すプリント配線板の一部の断
面図である。
FIG. 5 is a partial cross-sectional view of a printed wiring board showing a conventional problem.

【符号の説明】[Explanation of symbols]

1 シャンク 2 刃部 3 切り刃 1 shank 2 blade 3 cutting blade

Claims (1)

【特許請求の範囲】 【請求項1】 シャンクの先端に刃部を設けると共に刃
部の一側面の一方の側端縁の稜線に切り刃を形成したエ
ンドミルにおいて、切り刃を回転方向に向けて上り傾斜
する角度で傾斜させて成ることを特徴とするプリント配
線板加工用エンドミル。
Claim: What is claimed is: 1. An end mill having a blade portion at a tip of a shank and a cutting blade formed on a ridge line of one side edge of one side surface of the blade portion. An end mill for printed wiring board processing, characterized by being tilted at an angle of ascending.
JP3185049A 1991-07-25 1991-07-25 End mill for printed wiring board processing Pending JPH0531616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3185049A JPH0531616A (en) 1991-07-25 1991-07-25 End mill for printed wiring board processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3185049A JPH0531616A (en) 1991-07-25 1991-07-25 End mill for printed wiring board processing

Publications (1)

Publication Number Publication Date
JPH0531616A true JPH0531616A (en) 1993-02-09

Family

ID=16163905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3185049A Pending JPH0531616A (en) 1991-07-25 1991-07-25 End mill for printed wiring board processing

Country Status (1)

Country Link
JP (1) JPH0531616A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005144657A (en) * 2003-10-23 2005-06-09 Allied Material Corp Monocrystal diamond end mill and cutting method of hard fragile material
US7008549B2 (en) * 2003-03-26 2006-03-07 Dowa Mining Co., Ltd. Circuit board, process for producing the same and a power module employing the same
JP2007038344A (en) * 2005-08-03 2007-02-15 Dijet Ind Co Ltd End mill
JP2007319993A (en) * 2006-06-01 2007-12-13 Mitsui Kokuin:Kk End mill
DE102016116279A1 (en) 2016-08-31 2018-03-01 Datron Ag One-cutting milling tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS479431Y1 (en) * 1969-09-10 1972-04-10
JPS55150908A (en) * 1979-05-15 1980-11-25 Koei Chiyoukoku Kogyo Kk Cutting tool
JPS6347818U (en) * 1986-09-12 1988-03-31

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS479431Y1 (en) * 1969-09-10 1972-04-10
JPS55150908A (en) * 1979-05-15 1980-11-25 Koei Chiyoukoku Kogyo Kk Cutting tool
JPS6347818U (en) * 1986-09-12 1988-03-31

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7008549B2 (en) * 2003-03-26 2006-03-07 Dowa Mining Co., Ltd. Circuit board, process for producing the same and a power module employing the same
US7368665B2 (en) 2003-03-26 2008-05-06 Dowa Mining Co., Ltd. Circuit board and a power module employing the same
JP2005144657A (en) * 2003-10-23 2005-06-09 Allied Material Corp Monocrystal diamond end mill and cutting method of hard fragile material
JP2007038344A (en) * 2005-08-03 2007-02-15 Dijet Ind Co Ltd End mill
JP2007319993A (en) * 2006-06-01 2007-12-13 Mitsui Kokuin:Kk End mill
DE102016116279A1 (en) 2016-08-31 2018-03-01 Datron Ag One-cutting milling tool
EP3507044B1 (en) 2016-08-31 2020-09-30 Datron AG Single edge milling tool

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