JP2001121336A - Small diameter ball end mill - Google Patents
Small diameter ball end millInfo
- Publication number
- JP2001121336A JP2001121336A JP29669499A JP29669499A JP2001121336A JP 2001121336 A JP2001121336 A JP 2001121336A JP 29669499 A JP29669499 A JP 29669499A JP 29669499 A JP29669499 A JP 29669499A JP 2001121336 A JP2001121336 A JP 2001121336A
- Authority
- JP
- Japan
- Prior art keywords
- tool
- tip
- end mill
- ball end
- groove
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/005—Cylindrical shanks of tools
-
- 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
- B23C5/1018—Ball nose end mills with permanently fixed cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
- B23B2231/0204—Connection of shanks to working elements of tools
-
- 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
- B23B2240/28—Shrink-fitted connections, i.e. using heating and cooling to produce interference fits
-
- 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]
【発明の属する技術分野】本発明は、３次元金型加工用
ボールエンドミルに適用し、特に小径の工具刃先交換可
能な小径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 is applied to a ball end mill for three-dimensional die machining, and more particularly to a small-diameter ball end mill capable of exchanging a small-diameter tool tip.
【０００２】[0002]
【従来の技術】図２は従来のネシ゛止め式 市販の大径の工
具刃先交換可能なボールエンドミルある。大径の工具刃
先交換可能な工具は３次元金型加工を行なう際、工具チ
ップが摩耗した場サ合チップを交換すればよく、経済的
なため幅広く用いられてきた。しかし、金型等のリブ部
の幅が狭く、深さの深い部分の加工を行なう際、たとい
ば、鋳造金型等のリブ部分には使用出来ないため、その
場合は６ｍｍ径以下の小径のソリッドタイプのエンドミ
ルを使用してリブ形状を加工していた。2. Description of the Related Art FIG. 2 shows a conventional thread stop type ball end mill having a replaceable large-diameter tool tip. Large-diameter tool-tip-replaceable tools have been widely used because it is economical to replace the insert when the tool tip is worn when performing three-dimensional die machining. However, the width of the ribs of a mold or the like is small, and when processing a deep part, it cannot be used for a rib of a casting mold or the like. The rib shape was processed using a solid type end mill.
【０００３】[0003]
【発明が解決しようとする課題】従来の工具刃先交換可
能な工具では工具用チップをネジで止めてあり、このネ
ジの大きさには限界がある。また小さなネジを使用した
場合強度的に不足し、工具チップがはずれてしまうため
に６ｍｍ径以下の小径の工具チップを取りつけできない
という問題があった。In a conventional tool having a replaceable cutting edge, a tool tip is fixed with a screw, and the size of the screw is limited. In addition, when a small screw is used, the strength is insufficient, and the tool tip comes off, so that there is a problem that a tool tip having a small diameter of 6 mm or less cannot be attached.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、工具保持具先端部の溝形状が工具回転方向に対して
垂直ストッパーおよび水平ストッパーまたは両方設け、
その溝形状をもつ工具保持具へ、工具用チップを工具保
持材と工具用チップ材の熱膨張線から焼きばめ条件を決
定して、小径ボールエンドミルとする。In order to solve the above-mentioned problems, a groove shape at a tip portion of a tool holder is provided with a vertical stopper and / or a horizontal stopper in a tool rotation direction.
The conditions for shrink-fitting the tool tip into the tool holder having the groove shape from the thermal expansion line of the tool holding material and the tool tip material are determined, and a small-diameter ball end mill is obtained.
【０００５】[0005]
【発明の実施の形態】図１は本発明の小径ボールエンド
ミルの形状を示したものである。工具用チップ１と工具
保持材２で構成される。工具用チップの保持方法はチッ
プ材料と工具保持材料の熱膨張の差を利用する。構成部
品をある一定温度に加熱を行い工具保持具溝部へ工具用
チップをさし込み冷却した物である。図５、図６は本発
明の工具用チップ材料と工具保持具の熱膨張の関係をを
示した物である。工具保持具の溝巾を３mm公差±０とし
た時の熱膨張線をαで示す。工具超硬チップ厚さを変化
した時のそれらの熱膨張線をＡ〜Ｇまで示す。この結果
切削時の温度条件からαとＡ〜Ｇ交点を選択しその線の
工具用チップ厚さを選べば良い。図３は工具保持具の水
平断面溝形状を示した。一般は直溝形状でも良いが工具
が回転した時の抜け防止のため溝部に滑り止めを設けた
一例を示した。図４は溝部の垂直断面形状である。直溝
形状でも良いが、より強固にするためＴ型溝形状にした
一例を示した。FIG. 1 shows the shape of a small-diameter ball end mill according to the present invention. It is composed of a tool tip 1 and a tool holder 2. The method for holding the tool tip utilizes a difference in thermal expansion between the tip material and the tool holding material. The component is heated to a certain temperature, and a tool tip is inserted into the groove of the tool holder and cooled. 5 and 6 show the relationship between the thermal expansion of the tool tip material of the present invention and the tool holder. The thermal expansion line when the groove width of the tool holder is 3 mm tolerance ± 0 is indicated by α. The thermal expansion lines when the tool carbide tip thickness is changed are shown from A to G. As a result, the intersection of α and A to G may be selected from the temperature conditions at the time of cutting, and the tool tip thickness of that line may be selected. FIG. 3 shows the horizontal cross-sectional groove shape of the tool holder. Generally, a straight groove shape may be used, but an example in which a non-slip is provided in the groove portion to prevent the tool from coming off when the tool rotates is shown. FIG. 4 shows a vertical cross-sectional shape of the groove. Although a straight groove shape may be used, an example in which a T-shaped groove shape is used to make the groove stronger is shown.
【０００６】（実施例１）本発明にて、工具用チップ材
超硬材Ｋ種と工具保持具材高速度鋼（ＳＫＨ）使用し
て、溝形状はＴ溝とした。直径６mmのボールエンドミル
を作製する。工具保持具の溝巾を３mm± 0 0.001とし、
図５より工具用チップ厚さは３.0066mmと決定した。こ
の２つを焼きバメにて一対化させて直径６mmのボールエ
ンドミルを得た。また工具用チップの交換は図５より５
００℃以上に加熱するとＳＫＨ材と工具用チップ材との
熱膨張差ではずすことが出来、工具用チップの交換が容
易となる。(Example 1) In the present invention, a K-type chip material for a tool and a high-speed steel (SKH) material for a tool holder were used, and the groove shape was a T-shaped groove. A ball end mill having a diameter of 6 mm is manufactured. The groove width of the tool holder and 3mm ± 0 0.001,
From FIG. 5, the tool tip thickness was determined to be 3.0066 mm. The two were paired by baking to obtain a ball end mill having a diameter of 6 mm. The replacement of the tool tip is 5 according to FIG.
When heated to 00 ° C. or more, the SKH material and the tool tip material can be removed due to the difference in thermal expansion between them, and the tool tip can be easily replaced.
【０００７】（実施例２）図６を使用して図５と同様の
組み合わせにおいて、直径４mmのボールエンドミルを作
製する。工具保持具溝巾を２mm± 0 0.001とし溝形状を
図３の５を選択した。切削最高温度を６００℃とした。
図６より工具用チップ厚さを２.００５４mmとした。こ
の２つを焼きバメにて一対化させて直径４mmのボールエ
ンドミルを得た。同様にして、各工具鋼、超硬合金、サ
ーメット材、セラミックまたこれにハードコーテングし
た工具用材等と種々の工具保持具材ＳＫＨ、ＳＫＤ、Ｓ
Ｋ、ＳＣＭ、ＳＮＣＭ材等の組み合わせで本発明を利用
し、小径ボールエンドミル工具を作製することが出来
る。(Embodiment 2) A ball end mill having a diameter of 4 mm is manufactured in the same combination as in FIG. 5 using FIG. The 2 mm ± 0 0.001 and to the groove shape of the tool holder groove width were selected 5 of FIG. The maximum cutting temperature was set to 600 ° C.
According to FIG. 6, the tool tip thickness was set to 2.0054 mm. The two were paired by shrink fitting to obtain a ball end mill having a diameter of 4 mm. Similarly, various tool steels, cemented carbides, cermet materials, ceramics, hard-coated tool materials, and various tool holder materials SKH, SKD, S
The present invention can be used in combination of K, SCM, SNCM materials and the like to produce a small-diameter ball end mill tool.
【０００８】[0008]
【発明の効果】本発明により、小径のボールエンドミル
に工具用チップを取付けることができ、金型のリブ形状
などの幅が小さく、深さが深い部分の加工も工具刃先交
換可能な工具で加工できるようになった。According to the present invention, a tool tip can be mounted on a small-diameter ball end mill, and a part having a small width such as a rib shape of a mold and a part having a large depth can be machined with a tool having a replaceable tool edge. Now you can.
【図１】本発明の小径ボールエンドミル工具。FIG. 1 is a small-diameter ball end mill tool of the present invention.
【図２】従来式のボールエンドミル工具。FIG. 2 shows a conventional ball end mill tool.
【図3】本発明の工具保持具部分水平断面形状。FIG. 3 is a horizontal cross-sectional view of a tool holder according to the present invention.
【図４】本発明の工具保持具部分垂直断面形状。FIG. 4 is a vertical sectional view of a tool holder according to the present invention.
【図５】本発明の溝巾３mm時の焼きばめ条件決定図。FIG. 5 is a diagram showing shrink-fit conditions when the groove width is 3 mm according to the present invention.
【図６】本発明の溝巾2mm時の焼きばめ条件決定図。FIG. 6 is a diagram for determining shrink-fitting conditions when the groove width is 2 mm according to the present invention.
１ 工具保持具部分、２ 工具用チップ、３取り付けか締
めネジ部、 ４ 直溝形状、５ 凹型すべり止付溝、６ 凸型すべり止
付溝、 ７ Ｔ型溝縦断面、８ 直溝型縦断面。 α ＳＫＨ５１の熱膨張線、 Ａ〜Ｇ・Ａ'〜Ｈ' ＷＨ１０の各溝巾における熱膨張線1 Tool holder part, 2 Tool tip, 3 Mounting or tightening screw part, 4 Straight groove shape, 5 Recessed non-slip groove, 6 Convex non-slip groove, 7 T-shaped groove vertical section, 8 Straight groove vertical section surface. α SKH51 thermal expansion line, A ~ GA ・ A '~ H' WH10 thermal expansion line at each groove width
Claims (3)
へ、工具用チップをその溝への取付けたことを特徴とし
た小径ボールエンドミル。1. A small-diameter ball end mill characterized in that a tool tip is mounted in a groove of a tool holder having a grooved tip.
て、工具用チップの溝への取り付け条件を工具保持材と
工具用チップ材の熱膨張線から焼きばめ条件を決定した
ことを特徴とした小径ボールエンドミル。2. The small-diameter ball end mill according to claim 1, wherein shrink-fitting conditions are determined from tool thermal expansion lines of the tool holding material and the tool tip material as conditions for mounting the tool tip in the groove. Ball end mill.
て、工具保持具先端部の溝形状を工具回転方向に対して
垂直ストッパーおよび水平ストッパーまたは両方設けた
ことを特徴とした小径ボールエンドミル。3. The small-diameter ball end mill according to claim 1, wherein a groove at the tip of the tool holder is provided with a vertical stopper and / or a horizontal stopper in a tool rotation direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29669499A JP2001121336A (en) | 1999-10-19 | 1999-10-19 | Small diameter ball end mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29669499A JP2001121336A (en) | 1999-10-19 | 1999-10-19 | Small diameter ball end mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001121336A true JP2001121336A (en) | 2001-05-08 |
Family
ID=17836885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29669499A Pending JP2001121336A (en) | 1999-10-19 | 1999-10-19 | Small diameter ball end mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001121336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009050789A1 (en) * | 2007-10-16 | 2009-04-23 | Osg Corporation | Tip-type ball end mill, tip, and tip element |
-
1999
- 1999-10-19 JP JP29669499A patent/JP2001121336A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009050789A1 (en) * | 2007-10-16 | 2009-04-23 | Osg Corporation | Tip-type ball end mill, tip, and tip element |
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