JP2002205211A - Insertion type small-diameter rotating cutting tool - Google Patents

Insertion type small-diameter rotating cutting tool

Info

Publication number
JP2002205211A
JP2002205211A JP2001004539A JP2001004539A JP2002205211A JP 2002205211 A JP2002205211 A JP 2002205211A JP 2001004539 A JP2001004539 A JP 2001004539A JP 2001004539 A JP2001004539 A JP 2001004539A JP 2002205211 A JP2002205211 A JP 2002205211A
Authority
JP
Japan
Prior art keywords
diameter
tool
tool body
small
intermediate reinforcing
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
JP2001004539A
Other languages
Japanese (ja)
Inventor
Yuji Hirose
祐二 広瀬
Manabu Mochizuki
望月　　学
Megumi Omine
恵 大峯
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.)
Tungaloy Corp
Original Assignee
Toshiba Tungaloy Co 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 Toshiba Tungaloy Co Ltd filed Critical Toshiba Tungaloy Co Ltd
Priority to JP2001004539A priority Critical patent/JP2002205211A/en
Publication of JP2002205211A publication Critical patent/JP2002205211A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/80—Stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/84—Steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2240/00—Details of connections of tools or workpieces
    • B23B2240/08—Brazed connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2240/00—Details of connections of tools or workpieces
    • B23B2240/21—Glued connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/011—Micro drills

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To provide an insertion type small-diameter rotating cutting tool designed to improve tool rigidity. SOLUTION: The small-diameter rotating cutting tool 1 comprises a tool body part 2a formed of a tool body material made of cemented carbide and a shank part 3 formed of stainless, steel or the like. The two parts 2a, 3a are joined together by a shrinkage fit, brazing or press-in method, or by an adhesive. By connecting the tool body part 2a to an intermediate reinforcing part 2b and an insertion part 2c, reduction of diameter is effected in three steps. The diameter of the intermediate reinforcing part 2b is set to at least twice as large as the diameter of a blade tip during formation of the tool from a point of view of rigidity and set to up to 98% of the diameter of the insertion part 2c from a point of view of finishing precision. A length L of the tool body part 2a is set to 30-70% of a protrusion length L2 containing an intermediate reinforcing part 2b.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、プリント配線板、
プラスチックパッケージなどの加工に使用するドリル、
エンドミル、ルーターなどの差込み形の小径回転切削工
具に関し、特に、工具素材に形成される工具本体部分の
剛性が高められるようにしたものである。The present invention relates to a printed wiring board,
Drills used for processing plastic packages, etc.
The present invention relates to an insert-type small-diameter rotary cutting tool such as an end mill, a router, and the like, in particular, in which the rigidity of a tool body formed in a tool material is enhanced.

【０００２】[0002]

【従来の技術】従来、差込み形の小径回転切削工具は、
小径ドリルが一般的であるが、その接合手段としては、
焼きばめ、ろう付け、圧入、接着などが適用されてい
る。2. Description of the Related Art Conventionally, insertion type small diameter rotary cutting tools are
Small diameter drills are common, but as the joining means,
Shrink fit, brazing, press fitting, bonding, etc. are applied.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、この差
込み形の小径回転切削工具は、例えば、特開昭48−3226
4号公報に開示されているように、シャンク部分から突
き出される部分がフルートなどを形成した工具本体部分
になっているため、工具本体の剛性が低く、負荷のかか
る切削には不向きという問題点があった。However, this plug-in type small-diameter rotary cutting tool is disclosed, for example, in Japanese Patent Laid-Open No. 48-3226.
As disclosed in Japanese Unexamined Patent Publication No. 4 (1993), since the portion protruding from the shank portion is a tool body portion formed with a flute or the like, the rigidity of the tool body is low, and the tool body is not suitable for cutting with load. was there.

【０００４】このようなことから、本発明では、上述し
た問題点を解消するため、剛性が高められるように改善
した差込み形の小径用回転切削工具を提供しようとする
ものである。[0004] In view of the above, the present invention aims to provide a plug-in type small-diameter rotary cutting tool improved to increase the rigidity in order to solve the above-mentioned problems.

【０００５】[0005]

【課題を解決するための手段】本発明は、上述の点に鑑
みなされたもので、シャンク部分の受入れ穴内に工具素
材が差込まれることにより、受入れ穴から工具本体素材
に形成される工具本体部分が突き出されるようになって
いるドリル、エンドミルなどの差込み形の小径回転切削
工具を前提にして工具本体の剛性が高められるようにし
たものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a tool body formed from a receiving hole into a tool body material by inserting a tool material into a receiving hole of a shank portion. The rigidity of the tool body is enhanced on the premise of a plug-in small-diameter rotary cutting tool such as a drill or an end mill whose part is projected.

【０００６】すなわち、前記工具素材は、工具本体部分
が、受入れ穴内の差込み部分及び受入れ穴から突き出さ
れた中間補強部分に連接することによって三段階で縮径
するようになっているものである。これは、剛性の配慮
から、中間補強部分を介在させたものである。That is, the tool material is configured such that the diameter of the tool body is reduced in three stages by connecting the tool body portion to the insertion portion in the receiving hole and the intermediate reinforcing portion protruding from the receiving hole. This is one in which an intermediate reinforcing portion is interposed in consideration of rigidity.

【０００７】また、この中間補強部分の直径は、工具本
体成形時における刃先径の２倍以上あって、しかも工具
素材の差込み直径の98％以下に設定されていることが好
適する。そして、前記工具本体の長さＬ1は、中間補強
部分を含めた突き出し長さＬ２の30％〜70％に設定され
ていることが好ましい。It is preferable that the diameter of the intermediate reinforcing portion is set to be at least twice the diameter of the cutting edge when the tool body is formed and at most 98% of the insertion diameter of the tool material. The length L1 of the tool body is preferably set to 30% to 70% of the protrusion length L2 including the intermediate reinforcing portion.

【０００８】[0008]

【発明の実施の形態】以下、本発明差込み形の小径回転
切削工具の一実施例について、小径ドリルを適用した図
を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a small-diameter rotary cutting tool according to the present invention will be described below with reference to a drawing to which a small-diameter drill is applied.

【０００９】図１及び図２は、小径ドリルを概念的に示
した説明図であり、この小径ドリル１は、超硬合金など
からなる工具本体部分2a及びステンレス、鋼などからな
るシャンク部分３からなり、両者は、焼きばめ、ろう付
け、圧入、接着剤によって接合される。FIGS. 1 and 2 are explanatory views conceptually showing a small-diameter drill. This small-diameter drill 1 is composed of a tool body portion 2a made of a cemented carbide or the like and a shank portion 3 made of stainless steel, steel, or the like. And they are joined by shrink fitting, brazing, press fitting, and adhesive.

【００１０】そして、図１のシャンク部分３は、受入れ
穴４が止まり穴で圧入による接合の実施例が示され、図
２のシャンク部分３は、受入れ穴４が貫通穴で、接着剤
５による実施例が示されている。In the shank portion 3 of FIG. 1, the receiving hole 4 is a blind hole, and an embodiment of joining by press fitting is shown. In the shank portion 3 of FIG. 2, the receiving hole 4 is a through hole and an adhesive 5 is used. An example is shown.

【００１１】また、工具本体部分2aは、丸棒からなる工
具本体素材から、通常、図示しない一対の先端切れ刃
稜、フルートなどが形成されるが、本発明では、中間補
強部分2bを介して受入穴４内の差込み部分2cに連接さ
れ、三段階で縮径するようになっている。工具素材２の
材料としては、超硬合金のほか、サーメット、被覆超硬
合金、被覆サーメットなどが適用される。The tool body portion 2a is usually formed with a pair of cutting edge ridges, flutes and the like (not shown) from a tool body material formed of a round bar. It is connected to the insertion portion 2c in the receiving hole 4 and is reduced in diameter in three stages. As the material of the tool material 2, a cermet, a coated cemented carbide, a coated cermet, or the like is applied in addition to the cemented carbide.

【００１２】さらに、図３は、受入れ穴４が止まり穴
で、接着剤５による接合の実施例が示され、硬質材料か
らなる工具本体部分2aの先端部分には、ダイヤモンド、
ＣＢＮなどからなる超高圧焼結体６を備えたものが示さ
れている。この場合、超圧焼結体に代えて、TiC, TiN,
TiCN,アルミナなどの部分的な硬質被覆も適用できる。Further, FIG. 3 shows an embodiment in which the receiving hole 4 is a blind hole and the joining is performed by the adhesive 5, and the tool body 2a made of a hard material is provided with a diamond,
An apparatus provided with an ultrahigh-pressure sintered body 6 made of CBN or the like is shown. In this case, TiC, TiN,
Partial hard coatings such as TiCN and alumina can also be applied.

【００１３】また、図１〜図３に示されるように、前記
中間補強部分2bの直径φｂは、工具本体部分2aにおける
刃先径φａの２倍以上あり、しかも差込み部分2cの直径
φｃの９８％以下に設定される。φｂが、刃先径φａの
２倍未満では工具剛性が低くなり、φｂが、差込み部分
2cの直径φｃの９８％を越えると、接合時の偏芯を除去
できないおそれからである。As shown in FIGS. 1 to 3, the diameter φb of the intermediate reinforcing portion 2b is at least twice the diameter φa of the cutting edge in the tool body 2a, and 98% of the diameter φc of the insertion portion 2c. It is set as follows. If φb is less than twice the cutting edge diameter φa, the tool rigidity will be low, and φb
If it exceeds 98% of the diameter φc of 2c, the eccentricity at the time of joining cannot be removed.

【００１４】そして、前記工具本体部分2a及び中間補強
部分2bは、研削成形後においては、工具本体部分2bの長
さＬ1が、シャンク部分３からの中間補強部分2bを含ん
だ突き出し長さＬ２の30％〜70％に設定されることが好
ましい。これは、30％未満であると、穴あけ長さに制限
を受け、70％を越えると工具本体部分2aの剛性が低下す
るからである。The tool body portion 2a and the intermediate reinforcing portion 2b are formed such that the length L1 of the tool body portion 2b is equal to the protrusion length L2 including the intermediate reinforcing portion 2b from the shank portion 3 after grinding. Preferably, it is set to 30% to 70%. This is because if it is less than 30%, the drilling length is limited, and if it exceeds 70%, the rigidity of the tool body 2a decreases.

【００１５】次に、本発明品及び比較品の穴明け試験に
ついて説明する。本発明品に係る小径ドリル１は、図１
で示されるような止まり穴の受入れ穴４を有するシャン
ク部分３に適用したもので、工具本体素材を圧入により
接合し、刃先研削後、φ0.3mm×5.8mm（工具本体の長さ
Ｌ1）で中間補強部分2bを有する本発明品に係る小径ド
リルを製作した。Next, the drilling test of the product of the present invention and the comparative product will be described. The small diameter drill 1 according to the present invention is shown in FIG.
This is applied to the shank part 3 having a blind hole receiving hole 4 as shown in the above. The tool body material is joined by press-fitting, and after grinding the edge, it is φ0.3mm × 5.8mm (length L1 of the tool body). A small-diameter drill according to the present invention having the intermediate reinforcing portion 2b was manufactured.

【０００１６】これに対し、比較品の小径ドリルは、中
間補強部分2bを有しない圧入による差込み形の小径ドリ
ルであり、工具本体部分2aの長さをＬ1とし、刃先径、
フルートなどの工具形状及び超硬材種が同一になるよう
に製作した。On the other hand, the comparative small-diameter drill is a press-fit insertion small-diameter drill having no intermediate reinforcing portion 2b. The length of the tool body portion 2a is L1, the cutting edge diameter is
It was manufactured so that the tool shape such as flute and the cemented carbide grade were the same.

【００１７】また、加工条件及び使用基板（被削材）
は、以下のとおりで、各条件の加工穴数は、3,000hits
とした。 加工条件：1) 回転速度 Ｎ＝100kmin-1 送り量 f＝30μｍ/rev 2) 回転速度 Ｎ＝150kmin-1 送り量 f＝30μｍ/rev 使用基板：ＢＴレジン両面板4mm×10枚重ね 当板t0.15アルミ この結果、本発明品は、穴あけ後に測定した穴位置精度
において、比較品を上回り、その優位性が認められた。
単位：μｍ Also, the processing conditions and the substrate to be used (work material)
Is as follows, and the number of machining holes under each condition is 3,000hits
And Machining conditions: 1) Rotation speed N = 100kmin-1 Feed amount f = 30μm / rev 2) Rotation speed N = 150kmin-1 Feed amount f = 30μm / rev Substrate used: BT resin double-sided board 4mm x 10 sheets Applicable plate t0 .15 aluminum As a result, the product of the present invention was superior to the comparative product in hole position accuracy measured after drilling, and its superiority was recognized.
Unit: μm

【００１８】なお、本実施例では、代表的な圧入形式の
小径ドリルの例について説明したが、焼きばめ、ろう付
け、接着剤による場合も同様な傾向が認められた。ま
た、小径エンドミル、小径ルータなども同様に適用でき
ることは勿論である。In this embodiment, an example of a small-diameter drill of a typical press-fitting type has been described. However, the same tendency was observed in the case of shrink fit, brazing, and an adhesive. Needless to say, a small-diameter end mill, a small-diameter router, and the like can be similarly applied.

【００１９】[0019]

【発明の効果】本発明は、以上説明したように、差込み
形の小径回転切削工具を前提にして、剛性の高くなるよ
うな工具形状を配慮したものであるから、負荷のかかる
切削にも適用できるという利点を有する。As described above, the present invention is based on an insert-type small-diameter rotary cutting tool and takes into consideration a tool shape having a high rigidity. It has the advantage of being able to.

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

【図１】本発明差込み形の小径回転切削工具における一
実施例を示す要部の説明図である。FIG. 1 is an explanatory view of a main part showing one embodiment of a small-diameter rotary cutting tool of an insertion type according to the present invention.

【図２】本発明差込み形の小径回転切削工具における他
の実施例を示す要部の説明図である。FIG. 2 is an explanatory view of a main part showing another embodiment of the plug-in type small-diameter rotary cutting tool according to the present invention.

【図３】本発明差込み形の小径回転切削工具における別
の実施例を示す要部の説明図である。FIG. 3 is an explanatory view of a main part showing another embodiment of the plug-in type small-diameter rotary cutting tool of the present invention.

【符号の説明】[Explanation of symbols]

１ 小径ドリル 2a 工具本体部分 2b 中間補強部分 2c 差込み部分 ３ シャンク部分 ４ 受入れ穴 ５ 接着剤 ６ 超高圧焼結体 DESCRIPTION OF SYMBOLS 1 Small diameter drill 2a Tool main part 2b Intermediate reinforcement part 2c Insertion part 3 Shank part 4 Receiving hole 5 Adhesive 6 Ultra-high pressure sintered compact

フロントページの続き Ｆターム(参考） 3C022 KK01 3C037 AA09 DD05 FF11 Continued on the front page F term (reference) 3C022 KK01 3C037 AA09 DD05 FF11

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 シャンク部分の受入れ穴内に工具本体素
材が差込まれることにより、受入れ穴から工具素材に形
成される工具本体部分が突き出されるようになっている
ドリル、エンドミルなどの差込み形の小径回転切削工具
において、 前記工具素材は、工具本体部分が、受入れ穴内の差込み
部分及び受入れ穴から突き出された中間補強部分に連接
することによって三段階で縮径するようになっており、
この中間補強部分の直径が、工具本体成形時における刃
先径の２倍以上あって、しかも工具素材の差込み直径の
98％以下に設定されていることを特徴とする差込み形の
小径用回転切削工具。An insert type such as a drill and an end mill, wherein a tool body material formed in a tool material is projected from a receiving hole by inserting a tool body material into a receiving hole of a shank portion. In the small-diameter rotary cutting tool, the tool material is configured such that the tool body portion is reduced in diameter in three stages by being connected to the insertion portion in the receiving hole and the intermediate reinforcing portion protruding from the receiving hole,
The diameter of the intermediate reinforcing portion is at least twice the diameter of the cutting edge when the tool body is formed, and the diameter of the inserted tool material is
Insert-type small-diameter rotary cutting tool characterized by being set to 98% or less. 【請求項２】 前記工具本体の長さＬ1は、中間補強部
分を含めた突き出し長さＬ２の30％〜70％に設定されて
いる請求項１記載の差込み形の小径回転切削工具。2. The insertion small-diameter rotary cutting tool according to claim 1, wherein the length L1 of the tool main body is set to 30% to 70% of the protrusion length L2 including the intermediate reinforcing portion.
JP2001004539A 2001-01-12 2001-01-12 Insertion type small-diameter rotating cutting tool Pending JP2002205211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001004539A JP2002205211A (en) 2001-01-12 2001-01-12 Insertion type small-diameter rotating cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001004539A JP2002205211A (en) 2001-01-12 2001-01-12 Insertion type small-diameter rotating cutting tool

Publications (1)

Publication Number Publication Date
JP2002205211A true JP2002205211A (en) 2002-07-23

Family

ID=18872715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001004539A Pending JP2002205211A (en) 2001-01-12 2001-01-12 Insertion type small-diameter rotating cutting tool

Country Status (1)

Country Link
JP (1) JP2002205211A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100886966B1 (en) 2008-09-09 2009-03-10 유림전기(주) Manufacturing method of the clad type router bit
KR101192808B1 (en) 2012-03-30 2012-10-26 황적희 Two kinds structure with a dental cutting tools

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100886966B1 (en) 2008-09-09 2009-03-10 유림전기(주) Manufacturing method of the clad type router bit
KR101192808B1 (en) 2012-03-30 2012-10-26 황적희 Two kinds structure with a dental cutting tools

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