JPH01321109A - End mill - Google Patents
End millInfo
- Publication number
- JPH01321109A JPH01321109A JP15607988A JP15607988A JPH01321109A JP H01321109 A JPH01321109 A JP H01321109A JP 15607988 A JP15607988 A JP 15607988A JP 15607988 A JP15607988 A JP 15607988A JP H01321109 A JPH01321109 A JP H01321109A
- Authority
- JP
- Japan
- Prior art keywords
- run
- cutter tip
- tool
- groove
- flank
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 238000003754 machining Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 abstract description 9
- 230000006866 deterioration Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1081—Shank-type cutters, i.e. with an integral shaft with permanently fixed cutting inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は主に難削材を切削加工するに適したエンドミル
の形状に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to the shape of an end mill suitable for cutting difficult-to-cut materials.
（従来の技術）
従来、焼入鋼のように硬質で高強度な難削材料の切削加
工においては工具に激しい摩耗、或いは欠損が生じ、工
具寿命は非常に短くなることが知られている。(Prior Art) Conventionally, it has been known that when cutting a hard, high-strength, difficult-to-cut material such as hardened steel, severe wear or chipping occurs in the tool, resulting in a very short tool life.
（発明が解決しようとする課題）
第３図は従来のエンドミルを示すもので、図において、
ｌは底刃逃げ面、２は外周刃逃げ面、３は底切れ刃、４
は外周切れ刃、５はすくい面、６は底刃第２逃げ面、７
は外周刃第２逃げ面を示す。(Problem to be solved by the invention) Fig. 3 shows a conventional end mill, and in the figure,
l is the bottom blade flank, 2 is the peripheral blade flank, 3 is the bottom cutting edge, 4
is the outer peripheral cutting edge, 5 is the rake face, 6 is the second flank of the bottom blade, 7
indicates the second flank of the peripheral blade.
しかして、超硬エンドミルによる溝加工においては、第
４図に示すように、工具のコーナーエツジ部ａに摩耗が
集中し、工具逃げ面の摩耗面積増大による切削抵抗の増
加、或いは刃先部の欠損等が生じ易いため、工具寿命が
非常に短く、かつ加工精度の確保が難しいという問題点
がある。However, when machining grooves using a carbide end mill, as shown in Fig. 4, wear concentrates on the corner edge part a of the tool, increasing the cutting resistance due to an increase in the wear area of the tool flank, or causing damage to the cutting edge. etc., the tool life is very short and it is difficult to ensure machining accuracy.
そこで、工具寿命を増大させるためには工具摩耗を抑え
、切削抵抗の増加を防ぐことが必要なのであるが、一般
に工具逃げ面の摩耗面積を小さくするためには工具の逃
げ角を大きくするという方法がとられる。この方法は第
４図に示すように、刃先の機械的強度を弱くしてしまい
、焼入鋼等の難削材の加工においては、その切削抵抗の
大きいことにより、刃先欠損の原因となってしまう、加
えて、工具逃げ角が大きくなるにつれて、摩耗による工
具の外径、或いは全長の減寸量も大きくなり、また工具
のビビリの発生等の加工精度悪化の原因となるという欠
点もある。Therefore, in order to increase tool life, it is necessary to suppress tool wear and prevent an increase in cutting resistance.Generally speaking, in order to reduce the wear area on the tool flank surface, the tool clearance angle is increased. is taken. As shown in Figure 4, this method weakens the mechanical strength of the cutting edge, and when machining difficult-to-cut materials such as hardened steel, the large cutting resistance can cause edge breakage. In addition, as the tool relief angle increases, the amount of reduction in the outer diameter or overall length of the tool due to wear also increases, which also has the disadvantage of causing deterioration of machining accuracy such as occurrence of tool chatter.
第４図において、０）は逃げ角小の場合、（ロ）は逃げ
角大の場合を示す。In FIG. 4, 0) shows the case where the clearance angle is small, and (b) shows the case where the clearance angle is large.
本発明は従来の欠点を改善するために提案されたもので
、その目的は難削材加工において、工具摩耗を抑えるこ
とによる工具寿命の延長と加工精度の維持を図ることに
ある。The present invention was proposed to improve the conventional drawbacks, and its purpose is to extend tool life and maintain machining accuracy by suppressing tool wear when machining difficult-to-cut materials.
（課題を解決するための手段）
上記の目的を達成するため、本発明は加工刃具において
、カッター本体の底刃逃げ面と外周刃逃げ面から形成さ
れるコーナー部逃げ面に底刃第２逃げ面の方向に、底刃
第２逃げ面と外周刃第２逃げ面にわたって段差を形成し
たことを特徴とするエンドミルを発明の要旨とするもの
である。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a machining tool with a bottom blade second relief provided on a corner relief surface formed from a bottom blade relief surface and an outer peripheral blade relief surface of a cutter body. The gist of the invention is an end mill characterized in that a step is formed in the direction of the surface across the second flank face of the bottom blade and the second flank face of the peripheral blade.
換言すれば、本発明は超硬材のような焼結合金よりなる
工具材料を用いたエンドミルにおいて、底刃逃げ面と外
周刃逃げ面から形成されるコーナー部逃げ面に、底刃第
２逃げ面と外周刃第２逃げ面とにわたって段差を有する
ことを特徴としたエンドミルであって、その段差の工具
すくい面倒の端面と切れ刃との間隔は０．１１〜０．４
ｍｍの間にあり、段の深さは段差端面と切れ刃との間隔
の０．５〜５倍の間にあるものとしている。この工具逃
げ面に設けた段差は逃げ面摩耗幅の増大を抑え、同時に
切削抵抗の増加も防止する働きをしている。In other words, the present invention provides an end mill using a tool material made of a sintered alloy such as cemented carbide, in which a second bottom cutter relief is provided on a corner relief surface formed from a bottom cutter relief surface and a peripheral cutter relief surface. An end mill characterized in that it has a step between the surface and the second flank of the peripheral blade, and the distance between the end surface of the tool rake and the cutting edge of the step is 0.11 to 0.4.
The depth of the step is between 0.5 and 5 times the distance between the step end face and the cutting edge. This step provided on the flank face of the tool serves to suppress an increase in flank wear width and at the same time to prevent an increase in cutting resistance.
また、この段差によって刃先の機械的強度の低下が起こ
らないように段差の位置と形状の決定をしている。In addition, the position and shape of the step are determined so that the mechanical strength of the cutting edge does not decrease due to this step.
（実施例）
次に本発明の実施例について説明する。なお、実施例は
一つの例示であって、本発明の精神を逸脱しない範囲で
、種々の変更あるいは改良を行いうることは言うまでも
ない。(Example) Next, an example of the present invention will be described. Note that the embodiments are merely illustrative, and it goes without saying that various changes and improvements can be made without departing from the spirit of the present invention.
第１図は本発明のエンドミルを示すもので、印図におい
て刃先欠損が起こらないようにコーナー部にＲ加工を施
しであるラジアスエンドミルにおいて、刃先コーナー部
の第２逃げ面６および外周刃第２逃げ面７にまたがって
溝８を設けたものである。溝の代りに切欠を設けてもよ
い、溝の位置は溝の端面がすくい面５から０．２＋＊ｍ
のところにあり、その深さは約０．１−一程度である。FIG. 1 shows an end mill of the present invention. In the radius end mill, the corner part is rounded to prevent chipping of the cutting edge, and the second flank 6 of the corner part of the cutting edge and the second A groove 8 is provided across the flank 7. A notch may be provided instead of a groove.The position of the groove is such that the end face of the groove is 0.2+*m from the rake surface 5.
The depth is approximately 0.1-1.
また、（ロ）の拡大図に示すように溝の側面は刃先の強
度を落とさないようにＲをつけている。Furthermore, as shown in the enlarged view in (b), the sides of the groove are rounded so as not to reduce the strength of the cutting edge.
この工具の材質は超微粒子超硬とし、工具径はφ３であ
る。The material of this tool is ultrafine particle carbide, and the tool diameter is φ3.
この工具を用いて焼入鋼（ＳＫＤＩＩ、硬度Ｈ０５９）
の切削テストを行った結果、第２図に示すように逃げ面
の摩耗幅が０．２１１ｍ１で一定となり、従来工具より
も寿命の増加が認められ、さらに、摩耗幅が小さくなる
ため、被削材との接触面積が小さくなり、切削抵抗の低
減効果も認められた。Using this tool, harden steel (SKDII, hardness H059)
As a result of the cutting test, as shown in Fig. 2, the width of wear on the flank surface was constant at 0.211 m1, indicating an increase in tool life compared to conventional tools. The contact area with the material became smaller, and the effect of reducing cutting resistance was also observed.
また、溝を設けたことによって刃先欠損等の現象は起こ
らなかった。加えて、刃先の逃げ角は大きくしていない
ため、前述したような加工精度の悪化や工具のビビリ等
も生じなかった。Further, by providing the groove, phenomena such as cutting edge breakage did not occur. In addition, since the clearance angle of the cutting edge was not made large, there was no deterioration in machining accuracy or chatter of the tool as described above.
（発明の効果）
以上の説明のように本発明によれば、工具逃げ面に段差
をつけることによって、逃げ面摩耗の増加を抑えること
ができ、工具寿命の延長と同時に切削抵抗の低減が可能
となる効果を有する。(Effects of the Invention) As explained above, according to the present invention, by providing a step on the tool flank surface, increase in flank wear can be suppressed, and cutting resistance can be reduced at the same time as extending tool life. It has the effect of
第１図は本発明のエンドミルの実施例、第２図は本発明
品と従来品との比較データ、第３図は従来例、懐４図は
工具逃げ角の比較を示す。
１・・・底刃逃げ面 ２・・・外周刃逃げ面３・・・
底切れ刃 ４・・・外周切れ刃５・・・すくい面
６・・・底刃第２逃げ面７・・・外周刃第２逃げ面Fig. 1 shows an example of the end mill of the present invention, Fig. 2 shows comparative data between the product of the present invention and a conventional product, Fig. 3 shows a conventional example, and Fig. 4 shows a comparison of tool clearance angles. 1...Bottom blade flank 2...Outer blade flank 3...
Bottom cutting edge 4...Outer cutting edge 5...Rake face
6...Bottom blade second flank face 7...Peripheral blade second flank face
Claims (1)
逃げ面から形成されるコーナー部逃げ面に底刃第２逃げ
面の方向に、底刃第２逃げ面と外周刃第２逃げ面にわた
って段差を形成したことを特徴とするエンドミル。In the machining tool, a step is formed on the corner flank formed by the bottom blade flank and the peripheral blade flank of the cutter body in the direction of the bottom blade second flank surface, and across the bottom blade second flank surface and the peripheral blade second flank surface. An end mill characterized by forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15607988A JPH01321109A (en) | 1988-06-24 | 1988-06-24 | End mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15607988A JPH01321109A (en) | 1988-06-24 | 1988-06-24 | End mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01321109A true JPH01321109A (en) | 1989-12-27 |
Family
ID=15619844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15607988A Pending JPH01321109A (en) | 1988-06-24 | 1988-06-24 | End mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01321109A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925820A (en) * | 2015-11-26 | 2017-07-07 | 肯纳金属公司 | Cutting element and its manufacture method |
| US10357832B2 (en) * | 2014-10-24 | 2019-07-23 | Kyocera Corporation | Drill and method for manufacturing machined product using same |
-
1988
- 1988-06-24 JP JP15607988A patent/JPH01321109A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10357832B2 (en) * | 2014-10-24 | 2019-07-23 | Kyocera Corporation | Drill and method for manufacturing machined product using same |
| CN106925820A (en) * | 2015-11-26 | 2017-07-07 | 肯纳金属公司 | Cutting element and its manufacture method |
| US20180093330A1 (en) * | 2015-11-26 | 2018-04-05 | Kennametal Inc. | Cutting tool and method for its manufacture |
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