JPH0596415A - Ball end mill - Google Patents
Ball end millInfo
- Publication number
- JPH0596415A JPH0596415A JP28357791A JP28357791A JPH0596415A JP H0596415 A JPH0596415 A JP H0596415A JP 28357791 A JP28357791 A JP 28357791A JP 28357791 A JP28357791 A JP 28357791A JP H0596415 A JPH0596415 A JP H0596415A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- ball
- end mill
- ball end
- roundness
- 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
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract 2
- 238000013459 approach Methods 0.000 description 2
- 239000011195 cermet Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 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
- B23C5/1009—Ball nose end mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/02—Connections between the shanks and detachable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/03—Cutting heads comprised of different material than the shank irrespective of whether the head is detachable from the shank
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、フライス盤などの工作
機械で用いる超硬合金、サーメットまたはそれに類する
工具材料からなるソリッドのボール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 a solid ball end mill made of cemented carbide, cermet or similar tool materials used in machine tools such as milling machines.
【０００２】[0002]
【従来の技術】ボールエンドミルはボール刃先端に近づ
くに連れて切削速度が限りなく０に近づく。そのため刃
先諸元を工夫し、切れ味の向上および切削抵抗の削減が
行なわれてきた。例えば刃先角を鋭利にしたり、ボール
刃のネジレ角を大きくするなどの方法が知られている。
また、エンドミル形状は機械加工で成形されるためボー
ル部の刃溝形状は角度をもった稜で結ばれざるを得なか
った。2. Description of the Related Art In a ball end mill, the cutting speed approaches zero as much as it approaches the tip of a ball blade. Therefore, the cutting edge specifications have been devised to improve sharpness and reduce cutting resistance. For example, methods such as sharpening the blade angle and increasing the helix angle of the ball blade are known.
In addition, since the end mill shape is formed by machining, the flute shape of the ball portion must be tied with an angled ridge.
【０００３】[0003]
【発明が解決しようとする問題点】一方、ボール刃先端
部の摩滅を防止し、寿命を長くするため少しでもボール
刃先端付近に切削速度を与える必要から回転数を高目に
設定する傾向にあるが、従来技術ではいずれの場合も切
れ刃の強度が不足し、ボール刃の欠損が生じ易く寿命が
短いという問題が生じる。また、刃形の形状はフライス
または研削にて成形しており、とくにボール部を成形す
る際、加工機械の運動諸元の制限により、自由な刃形形
状を製作しにくい状況にあり、その為切り屑の排出性が
悪い等の問題がある。On the other hand, in order to prevent wear of the tip of the ball blade and prolong the life of the ball blade, it is necessary to give a cutting speed near the tip of the ball blade as much as possible, so that the number of revolutions tends to be set higher. However, in any of the conventional techniques, there is a problem that the strength of the cutting edge is insufficient and the ball blade is liable to be damaged and the life is short. In addition, the shape of the blade is formed by milling or grinding, and especially when forming the ball part, it is difficult to produce a free blade shape due to the limitations of the motion specifications of the processing machine. There are problems such as poor chip discharge.
【０００４】[0004]
【本発明の目的】本発明は以上の問題を解消するために
なされたもので、切削中の欠損およびチッピング等を抑
制し、切れ味が良好でかつ長寿命なボールエンドミルを
提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and is intended to provide a ball end mill that suppresses defects such as chipping and chipping during cutting, has good sharpness, and has a long life. is there.
【０００５】[0005]
【問題を解決するための手段】本発明は、上記の目的を
達成するために、ボール刃の刃底に少なくとも刃径の５
％以上の半径をもつ丸みを有し、すくい面と滑らかに連
続させたものである。また、ボール刃における切れ刃稜
線を除く各部分を曲面で滑らかに結び、さらに必要に応
じてボール刃部を交換できるようボール刃部を本体と着
脱式にしてもよい。なお、これらの形状は射出成形法を
応用することにより実現するものであり、切れ味を損わ
ず切れ刃強度を向上させ、切り屑の排出性を良好にする
という技術的手段を講じたものである。さらに、ボール
刃部を着脱式にした場合は、着脱のための握み部を射出
成型法により刃型と同時に成型するという技術的手段を
講じたものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has at least a blade diameter of at least 5 at the bottom of a ball blade.
It has a roundness with a radius of at least%, and is smoothly continuous with the rake face. Further, each part of the ball blade other than the cutting edge ridge may be smoothly connected by a curved surface, and the ball blade part may be detachable from the main body so that the ball blade part can be replaced if necessary. Note that these shapes are realized by applying the injection molding method, and take technical means to improve the cutting edge strength without impairing the sharpness and to improve the chip discharge property. is there. Further, when the ball blade portion is made detachable, a technical means is adopted in which the grip portion for attachment and detachment is molded simultaneously with the blade mold by an injection molding method.
【０００６】[0006]
【作用】以上の技術的手段を講じることにより、ボール
部刃溝が丸みを有するため、切り屑の流れが円滑になり
切れ味が良好、かつ切れ刃強度が向上し、工具寿命を長
める。さらに着脱式にすることによって再生が容易とな
り工具寿命との相乗効果により大幅に工具費用を削減で
きる。なお、さらにこれらの形状を射出成形法の応用に
より製作することによって加工コストの削減も可能にな
る。By taking the above technical measures, the ball groove has a rounded groove, so that the flow of chips is smooth and the cutting performance is good, the cutting edge strength is improved, and the tool life is extended. Furthermore, the detachable type makes it easier to regenerate, and the synergistic effect with the tool life can greatly reduce the tool cost. Further, by manufacturing these shapes by applying the injection molding method, the processing cost can be reduced.
【０００７】[0007]
【実施例】図１は本発明の一実施例である。ここでは刃
径２５ｍｍ超硬合金製の２枚刃ボールエンドミルに適用
した場合を図示している。刃底に刃径の２４％、すなわ
ち半径６ｍｍの丸みを設け、切れ刃稜線を除く各部分を
滑らかに曲面でつなぎ、ボール刃を含む部分をねじを用
いた着脱式にしたものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention. Here, the case where it is applied to a two-blade ball end mill made of a cemented carbide with a blade diameter of 25 mm is shown. A roundness having a radius of 6 mm, that is, 24% of the blade diameter, is provided on the blade bottom, parts other than the cutting edge ridge line are smoothly connected by a curved surface, and a part including the ball blade is detachable using screws.
【０００８】図３に送り速度を変化させた時の切削性能
を示すが従来品が送り１０００ｍｍ／ｍｉｎ で切り屑
づまりを起こし機械がオーバーロードになり限界に達し
たのに対し、本発明品は切り屑の排出がよく、送り１５
００ｍｍ／ｍｉｎまで上下、左右いずれの方向にも円滑
な切削が可能であった。FIG. 3 shows the cutting performance when the feed speed is changed. The conventional product cuts at a feed rate of 1000 mm / min, causing the machine to overload and reaching its limit. Good scrap discharge, 15 feeds
It was possible to cut smoothly up and down and right and left up to 00 mm / min.
【０００９】[0009]
【発明の効果】以上のように本発明によれば、切れ味が
良好でかつ長寿命なボールエンドミルが実現でき、さら
に工具製作費用および切削加工時の工具費用の軽減も可
能となったのである。また、工具寿命到達時において損
耗の生じたボール刃部は専用スパナを使用して容易に新
しいものと交換でき、工具費用のみならず切削時の段取
り時間が短縮できたのである。As described above, according to the present invention, it is possible to realize a ball end mill having a good sharpness and a long life, and it is also possible to reduce the tool manufacturing cost and the tool cost during cutting. Moreover, the ball blade portion that has worn out when the tool life has been reached can be easily replaced with a new one by using a dedicated spanner, and not only the tool cost but also the setup time at the time of cutting can be shortened.
【図１】Ａ、Ｂ、Ｃは本発明の一実施例を示し、Ａ図は
その正面図、Ｂ図はその側面図、Ｃ図はボール４５゜方
向の断面図である。1A, 1B and 1C show an embodiment of the present invention, FIG. 1A is a front view thereof, FIG. 1B is a side view thereof, and FIG. 1C is a sectional view in the direction of a ball 45 °.
【図２】Ａ、Ｂ、Ｃは従来品の一例を示し、Ａ図はその
正面図、Ｂ図はその側面図、Ｃ図はボール４５゜方向の
断面図である。2A, 2B and 2C show an example of a conventional product, FIG. 2A is a front view thereof, FIG. 2B is a side view thereof, and FIG.
【図３】本発明品と従来品の切削効果を示す説明図であ
る。FIG. 3 is an explanatory diagram showing cutting effects of the product of the present invention and the conventional product.
１ 本体 ２ 切れ刃稜 ３ 刃底 ４ チップポケット 1 Body 2 Cutting edge 3 Blade bottom 4 Chip pocket
Claims (4)
ルエンドミルにおいて、そのボール刃の刃底に、切れ刃
に直角な断面において少なくとも刃径の５％以上の半径
をもつ丸みを有し、すくい面と滑らかに連続させたこと
を特徴とするボールエンドミル。1. A ball end mill used in a machine tool such as a milling machine, the ball bottom of which has a roundness having a radius of at least 5% or more of the blade diameter in a cross section perpendicular to the cutting edge and which serves as a rake face. Ball end mill characterized by being smoothly continuous.
除く各部分を滑らかに曲線で結んだことを特徴とする請
求項１記載のボールエンドミル。2. The ball end mill according to claim 1, wherein, in the ball blade portion, each portion except the cutting edge ridge line is smoothly connected by a curved line.
１ないし３記載のボールエンドミル。3. The ball end mill according to claim 1, wherein an injection molding method is applied to the manufacturing method.
たことを特徴とする請求項１ないし２記載のボールエン
ドミル。4. The ball end mill according to claim 1, wherein a portion including the ball blade is detachable from the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28357791A JPH0596415A (en) | 1991-10-03 | 1991-10-03 | Ball end mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28357791A JPH0596415A (en) | 1991-10-03 | 1991-10-03 | Ball end mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0596415A true JPH0596415A (en) | 1993-04-20 |
Family
ID=17667327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28357791A Pending JPH0596415A (en) | 1991-10-03 | 1991-10-03 | Ball end mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0596415A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0777545B2 (en) † | 1994-08-29 | 2010-07-07 | Sandvik Intellectual Property AB | Ball end mill |
| US20140294527A1 (en) * | 2013-03-26 | 2014-10-02 | Kennametal Inc. | Tool head and method for machining a metallic workpiece |
| EP3442735B1 (en) | 2016-04-12 | 2023-09-20 | Iscar Ltd. | Replaceable face-milling head with integrally formed threaded shank-connector |
| CN117381039A (en) * | 2023-09-28 | 2024-01-12 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | A staggered tooth vibration-damping ball-end micro milling cutter and its preparation method |
-
1991
- 1991-10-03 JP JP28357791A patent/JPH0596415A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0777545B2 (en) † | 1994-08-29 | 2010-07-07 | Sandvik Intellectual Property AB | Ball end mill |
| US20140294527A1 (en) * | 2013-03-26 | 2014-10-02 | Kennametal Inc. | Tool head and method for machining a metallic workpiece |
| US9415450B2 (en) * | 2013-03-26 | 2016-08-16 | Kennametal Inc. | Tool head and method for machining a metallic workpiece |
| EP3442735B1 (en) | 2016-04-12 | 2023-09-20 | Iscar Ltd. | Replaceable face-milling head with integrally formed threaded shank-connector |
| CN117381039A (en) * | 2023-09-28 | 2024-01-12 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | A staggered tooth vibration-damping ball-end micro milling cutter and its preparation method |
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