JPH0310707A - Torsion chip of sintered hard body - Google Patents
Torsion chip of sintered hard bodyInfo
- Publication number
- JPH0310707A JPH0310707A JP14605689A JP14605689A JPH0310707A JP H0310707 A JPH0310707 A JP H0310707A JP 14605689 A JP14605689 A JP 14605689A JP 14605689 A JP14605689 A JP 14605689A JP H0310707 A JPH0310707 A JP H0310707A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- cut
- blank
- sintered body
- hard sintered
- 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.)
- Granted
Links
- 239000010953 base metal Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 25
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 238000007730 finishing process Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、スパイラルエンドミルやスパイラルリーマ
などねじれ刃をもつ切削工具に使用される硬質焼結体で
作られたねじれチップに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a twisted tip made of a hard sintered body used in cutting tools with twisted edges such as spiral end mills and spiral reamers.
ダイヤモンド、高圧相型窒化硼素、又はこれ等の混合物
を主体とする硬質焼結体は、通常、第６図に示すような
平板状に製作される。同図はｌｉｄ！質焼結体１の超高
圧焼結時に超硬合金台金２を一体成形した複合硬質焼結
体を例示している。A hard sintered body mainly made of diamond, high-pressure phase type boron nitride, or a mixture thereof is usually manufactured in the shape of a flat plate as shown in FIG. The same figure is lid! A composite hard sintered body is illustrated in which a cemented carbide base metal 2 is integrally molded during ultra-high pressure sintering of the solid sintered body 1.
硬質焼結体の切刃を有する従来の切削工具は、図示の如
き平板状チップ４を、第７図に示すように所定の工具の
刃部先端に固着している。また、硬質焼結体１の厚みが
一般に１−以下と薄いため、この制約から切刃のねじれ
角ば０”又はねじれ角を付ける場合もその値を５°以下
の掻く緩い角度にしている。In a conventional cutting tool having a cutting edge made of a hard sintered body, a flat tip 4 as shown in the drawing is fixed to the tip of a predetermined tool blade as shown in FIG. Further, since the thickness of the hard sintered body 1 is generally as thin as 1-1 or less, due to this restriction, the helix angle of the cutting blade is set to 0'' or when the helix angle is set, the value is set to a gentle angle of 5 degrees or less.
上述した平板状の硬質焼結体をねじれチップに加工する
場合、ねじれの影響で切刃は後端に向かうに従うで硬質
焼結体の厚み方向に変位していくので、その変位量を硬
質焼結体の厚み以下、即ちｌｕ以下に収めなければなら
ない、ねじれ角の大きさが５１以内の小さな値に制限さ
れるのはこのためであるが、この制限を無くさないと硬
質焼結体の切刃を有する工具の場合、ねじれ角を大きく
して切れ味や切削力等の面で更なる高性能化を計ろうと
してもそれが叶わない。When processing the above-mentioned flat hard sintered body into a twisted chip, the cutting edge will be displaced in the thickness direction of the hard sintered body as it moves toward the rear end due to the influence of the twist. This is why the size of the torsion angle is limited to a small value within 51 which must be below the thickness of the compact, that is, below lu. In the case of tools with blades, even if you try to increase the helix angle to further improve performance in terms of sharpness, cutting power, etc., it will not be possible.
この発明の課題は、か−る問題点を解決した硬質焼結体
のねじれチップを提供することにある。An object of the present invention is to provide a twisted tip made of a hard sintered body that solves the above problems.
この発明のねじれチップは、ダイヤモンド、高圧相型窒
化硼素、又はこれ等の混合物を主体とする硬質焼結体も
しくはこれに超硬合金台金を一体化してある複合硬質焼
結体で作られたねじれチップであって、その基本形状が
、円柱又は円筒状の素材（台金材料を含むものはこの材
料が硬質焼結体の内側に同心配置される）から、素材外
周面と交わる２つのねじれた面を幅方向両端のカット面
として素材の一部を縦割り状態に切出した形をなしてい
るものである。The twisted tip of the present invention is made of a hard sintered body mainly made of diamond, high-pressure phase boron nitride, or a mixture thereof, or a composite hard sintered body in which a cemented carbide base metal is integrated with this. A twisted chip whose basic shape is a cylinder or cylindrical material (for those that include a base metal material, this material is arranged concentrically inside a hard sintered body), and two twisted chips that intersect with the outer peripheral surface of the material. A part of the material is cut vertically, with the cut surfaces at both ends in the width direction.
か−るねじれチップは、ワイヤーカット放電加工により
円柱又は円筒状素材を一端から他端に向けて螺旋状縦割
すするようにカットしてい（方法で、容易に製造するこ
とができる。なお、この方法の詳細については実施例の
項で述べる。Such twisted tips can be easily manufactured by cutting a cylinder or a cylindrical material by wire-cut electric discharge machining so as to vertically split a column or cylindrical material from one end to the other end in a spiral shape. Details of this method will be described in the Examples section.
か−るチップは、素材径と工具径が同一であるとすると
、切刃のねじれによる変位が素材の外周面上で起こる。In such a chip, if the diameter of the material and the diameter of the tool are the same, displacement of the cutting edge due to twisting occurs on the outer peripheral surface of the material.
従って、素材の外周面とカット面との交線を切刃として
硬質焼結体の厚み（その方向は素材の径方向と一致する
）によるねじれ角設定の規制を無くすことができる。Therefore, it is possible to eliminate the restriction on the helix angle setting due to the thickness of the hard sintered body (the direction of which coincides with the radial direction of the material) using the cutting edge as the intersection line between the outer circumferential surface of the material and the cut surface.
第１図はこの発明のねじれチップの基本形を示すもので
、図中１はダイヤモンド、高圧相型窒化硼素、又はこれ
等の混合物のいずれかを主体とする硬質焼結体、２は１
と一体化されている超硬合金台金、３は切刃となるエッ
ヂである。このねじれチップ１０は、以下のようにして
製造されている。FIG. 1 shows the basic shape of the twisted tip of the present invention, in which 1 is a hard sintered body mainly made of diamond, high-pressure phase boron nitride, or a mixture of these, and 2 is 1
3 is an edge that becomes a cutting blade. This twisted chip 10 is manufactured as follows.
即ち、先ず、第２図に示すように、一定厚みの硬質焼結
体１が台金２の外周に一体に同心配置されている円柱状
素材１１を超高圧焼結によって作る０次にこの素材１１
の端面を図のように放電加工用のカントワイヤ１２に対
面させる。そして、カットワイヤ１２により端面中心か
ら切断を開始し、第３図に示すように、素材１１を一定
速度で回転させながら一定速度で送りをかけて他端まで
切り進める。切断位置を変えてこの作業を２度実施する
と第４図に示す鎖線領域が切出される。この切断によっ
て２個できるチップがいずれも第１図の形状となる。That is, as shown in FIG. 2, first, a cylindrical material 11 in which a hard sintered body 1 of a constant thickness is arranged concentrically around the outer periphery of a base metal 2 is made by ultra-high pressure sintering. 11
The end face of the wire is made to face the cant wire 12 for electrical discharge machining as shown in the figure. Then, cutting is started from the center of the end surface using the cut wire 12, and as shown in FIG. 3, the material 11 is rotated at a constant speed and fed at a constant speed to advance to the other end. If this operation is performed twice by changing the cutting position, the area shown by the chain line in FIG. 4 is cut out. The two chips produced by this cutting both have the shape shown in FIG.
なお、この方法による素材のカッティングは、図のよう
にチップの幅方向両端のカット面が素材の軸心で交わる
ように行なうと素材を無駄なく利用できる。Note that when cutting the material using this method, the material can be used without wastage if the cutting surfaces at both ends in the width direction of the chip intersect at the axis of the material as shown in the figure.
このようにして作られた基本形のねじれチップは、台金
２の尖鋭部側を除去して工具の刃先部に固着し、その後
、必要に応じてすくい角、逃げ角調整や刃先強化のため
の仕上げ加工を施す、なお、チップ１０を切出す素材の
径は必ずしもそのチップを使用する工具の径と一致して
いる必要はない。The basic helical tip made in this way is fixed to the cutting edge of the tool by removing the sharp side of the base metal 2, and then adjusting the rake angle and relief angle and strengthening the cutting edge as necessary. Note that the diameter of the material from which the tip 10 is cut does not necessarily have to match the diameter of the tool that uses the tip.
第５図は、この発明のねじれチップを使用して作ったり
−マである０図のように、チップ１０は基本形のものに
存在する台金２の尖鋭部を切除してリーマ１３の刃部１
４先端に設けた座部に接合してあり、仕上げ加工後も硬
質焼結体１の厚みは基本形のときの厚みかは奮゛そのま
一部されている。FIG. 5 shows a reamer made using the twisted tip of the present invention. As shown in FIG. 1
4 is joined to a seat provided at the tip, and even after finishing, the thickness of the hard sintered body 1 is still only a fraction of the thickness of the basic shape.
以上述べたように、この発明の硬質焼結体チップは、円
柱又は円筒状素材の一部を、素材外周面と交わる２つの
ねじれた面をカット面として縦割り状態に切出した形に
して硬質焼結体の厚みによるねじれ角設定の規制を無く
したものであるから、切刃のねじれ角を大きくして工具
の切削性能を更に向上させることが可能になると云う効
果がある。As described above, the hard sintered chip of the present invention is made by cutting out a part of a cylinder or cylindrical material vertically with two twisted surfaces that intersect with the outer circumferential surface of the material as cut surfaces. Since the helix angle setting is not restricted by the thickness of the sintered body, the helix angle of the cutting edge can be increased to further improve the cutting performance of the tool.
第１図はこの発明のチップの基本形を示す斜視図、第２
図乃至第４図は同上のチップの製造方法を示す工程図、
第５図（ａ）はこの発明のチップを用いたリーマの側面
図、同図（ｂ）はその正面図、第６図は従来の平板状硬
質焼結体チップの斜視図、第７図（ａ）は従来チップを
用いた切削工具の側面図、同図０））は同上の正面図で
ある。
１・・・・・・硬質焼結体、 ２・・・・・・超硬合
金台金、３・・・・・・エツジ（切刃）、１０・・・・
・・ねじれチップ、１１・・・・・・円柱状素材、
１２・・・・・・カットワイヤ、１３・・・・・・リー
マ。Fig. 1 is a perspective view showing the basic shape of the chip of the present invention;
4 to 4 are process diagrams showing a method for manufacturing the same chip as above,
FIG. 5(a) is a side view of a reamer using the tip of the present invention, FIG. 5(b) is a front view thereof, FIG. 6 is a perspective view of a conventional flat hard sintered tip, and FIG. a) is a side view of a cutting tool using a conventional tip, and FIG. 0)) is a front view of the same. 1...Hard sintered body, 2...Cemented carbide base metal, 3...Edge (cutting blade), 10...
...Twisted chip, 11...Cylindrical material,
12...Cut wire, 13...Reamer.
Claims (1)
混合物を主体とする硬質焼結体もしくはこれに超硬合金
台金を一体化してある複合硬質焼結体で作られたねじれ
チップであって、その基本形状が、円柱又は円筒状の素
材（台金材料を含むものはこの材料が硬質焼結体の内側
に同心配置される）から、素材外周面と交わる２つのね
じれた面を幅方向両端のカット面として素材の一部を縦
割り状態に切出した形をなしていることを特徴とする硬
質焼結体ねじれチップ。(1) A twisted tip made of a hard sintered body mainly made of diamond, high-pressure phase boron nitride, or a mixture of these, or a composite hard sintered body in which a cemented carbide base metal is integrated with this. The basic shape is a cylinder or cylindrical material (for those that include a base metal material, this material is placed concentrically inside the hard sintered body), and the width is set by two twisted surfaces that intersect with the outer peripheral surface of the material. A hard sintered twisted chip characterized by having a shape in which a part of the material is cut vertically as cut surfaces at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1146056A JP2720953B2 (en) | 1989-06-07 | 1989-06-07 | Hard sintered body twisted tip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1146056A JP2720953B2 (en) | 1989-06-07 | 1989-06-07 | Hard sintered body twisted tip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0310707A true JPH0310707A (en) | 1991-01-18 |
| JP2720953B2 JP2720953B2 (en) | 1998-03-04 |
Family
ID=15399092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1146056A Expired - Lifetime JP2720953B2 (en) | 1989-06-07 | 1989-06-07 | Hard sintered body twisted tip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2720953B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5226760A (en) * | 1990-02-07 | 1993-07-13 | Gn Tool Co., Ltd. | Cutting tool with twisted edge and manufacturing method thereof |
| US5273379A (en) * | 1992-01-23 | 1993-12-28 | Gn Tool Co., Ltd. | Blank material for drill and drill therefrom |
| US5297456A (en) * | 1990-02-07 | 1994-03-29 | Gn Tool Co., Ltd. | Cutting tool with twisted edge and manufacturing method thereof |
| EP0695596A1 (en) | 1994-07-06 | 1996-02-07 | Sumitomo Electric Industries, Ltd. | Rotary cutting tool and method of manufacturing the same |
| KR20180088454A (en) | 2016-11-15 | 2018-08-03 | 스미또모 덴꼬오 하드메탈 가부시끼가이샤 | Cutting tool |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695525A (en) * | 1979-12-27 | 1981-08-03 | G N Tool Kk | Boring reamer |
| JPS5695526A (en) * | 1979-12-27 | 1981-08-03 | G N Tool Kk | Boring reamer |
| JPS59107820A (en) * | 1982-12-09 | 1984-06-22 | Nachi Fujikoshi Corp | Cutter tool having helical tooth made of hard material and manufacture thereof |
-
1989
- 1989-06-07 JP JP1146056A patent/JP2720953B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695525A (en) * | 1979-12-27 | 1981-08-03 | G N Tool Kk | Boring reamer |
| JPS5695526A (en) * | 1979-12-27 | 1981-08-03 | G N Tool Kk | Boring reamer |
| JPS59107820A (en) * | 1982-12-09 | 1984-06-22 | Nachi Fujikoshi Corp | Cutter tool having helical tooth made of hard material and manufacture thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5226760A (en) * | 1990-02-07 | 1993-07-13 | Gn Tool Co., Ltd. | Cutting tool with twisted edge and manufacturing method thereof |
| US5297456A (en) * | 1990-02-07 | 1994-03-29 | Gn Tool Co., Ltd. | Cutting tool with twisted edge and manufacturing method thereof |
| US5273379A (en) * | 1992-01-23 | 1993-12-28 | Gn Tool Co., Ltd. | Blank material for drill and drill therefrom |
| EP0695596A1 (en) | 1994-07-06 | 1996-02-07 | Sumitomo Electric Industries, Ltd. | Rotary cutting tool and method of manufacturing the same |
| KR20180088454A (en) | 2016-11-15 | 2018-08-03 | 스미또모 덴꼬오 하드메탈 가부시끼가이샤 | Cutting tool |
| US10717134B2 (en) | 2016-11-15 | 2020-07-21 | Sumitomo Electric Hardmetal Corp. | Cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2720953B2 (en) | 1998-03-04 |
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