JPH02180518A - Soldering type drilling tool - Google Patents
Soldering type drilling toolInfo
- Publication number
- JPH02180518A JPH02180518A JP33556788A JP33556788A JPH02180518A JP H02180518 A JPH02180518 A JP H02180518A JP 33556788 A JP33556788 A JP 33556788A JP 33556788 A JP33556788 A JP 33556788A JP H02180518 A JPH02180518 A JP H02180518A
- Authority
- JP
- Japan
- Prior art keywords
- shank
- cemented carbide
- tip
- cutting
- tool
- 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
- 238000005553 drilling Methods 0.000 title 1
- 238000005476 soldering Methods 0.000 title 1
- 238000005520 cutting process Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000003801 milling Methods 0.000 claims description 11
- 238000005219 brazing Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Drilling Tools (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、ロウ付け式転削工具、すなわち鋼製のシャン
クのチップ座にチップをロウ付けし、その端部にムクの
超硬合金をロウ付けしたドリルやエンドミルなとの転削
工具に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a brazing type milling tool, that is, a chip is brazed to the chip seat of a steel shank, and a solid cemented carbide is attached to the end of the tool. This relates to cutting tools such as brazed drills and end mills.
[従来技術]
従来、鋼製のシャンクにムクの超硬合金製切刃を接合す
るのに超硬合金製切刃の上端部に形成した■形溝とシャ
ンクの端面に設けたV膨突部とを嵌合させてロウ付けし
た超硬ドリルが実公昭55−37284号公報に開示さ
れている。[Prior art] Conventionally, when joining a solid carbide cutting blade to a steel shank, a ■-shaped groove was formed on the upper end of the cemented carbide cutting blade and a V-shaped protrusion was provided on the end face of the shank. Japanese Utility Model Publication No. 55-37284 discloses a carbide drill in which the two are fitted and brazed together.
また、特公昭54−6420号公報にも鋼製シャンクに
ムクの超硬合金製切刃を接合するにあたって、V字状部
の頂角間に水平面を形成し、この水平面にドリルのマー
ジンエツジ部分を含むようにして該シャンクと該超硬合
金製切刃とを接合した超硬ドリルが開示されている。In addition, Japanese Patent Publication No. 54-6420 also states that when joining a solid carbide cutting blade to a steel shank, a horizontal plane is formed between the apex angles of the V-shaped part, and the margin edge part of the drill is attached to this horizontal plane. A cemented carbide drill is disclosed in which the shank and the cemented carbide cutting blade are joined to each other so as to include the shank and the cemented carbide cutting blade.
[発明が解決しようとする問題点コ
しかしなが−らミ実公昭55−37284号公報に開示
されている超硬ドリルの接合面5は、ドリル軸中心を基
準に7字状をなしており、これがドリルの回転時におい
て前記接合面の接線は同じ位置で回転することになる。[Problems to be solved by the invention However, the joint surface 5 of the cemented carbide drill disclosed in Lami-Jitsu Publication No. 55-37284 has a 7-shape with the center of the drill shaft as a reference. , this means that when the drill rotates, the tangent to the joint surface rotates at the same position.
したがって、先端切刃のみが切削に関与し、マージン部
は主にガイドの役目をするドリルにおいては該接合面の
接線が同位置で回転しても被剛材の穴内周にキズを付け
ることも少なく問題にならないが、エンドミルのように
先端切刃と外周側切刃とが共に切削に関与する転削工具
においては前記した接合面にある硬度の低いロウ層およ
び銅板などの介在物が切削時に摩耗や欠落して接合面部
にスキマが生じ、被削面に削り残し部分がでて被削面精
度を大きく劣化させるのと、工具寿命を著しく低下させ
る恐れがある。Therefore, in a drill where only the tip cutting edge is involved in cutting and the margin part mainly serves as a guide, even if the tangent to the joint surface rotates at the same position, there is a risk of scratching the inner circumference of the hole in the rigid material. Although this is not a small problem, in cutting tools such as end mills where both the tip cutting edge and the outer cutting edge participate in cutting, inclusions such as the low-hardness wax layer and copper plate on the joint surface mentioned above may occur during cutting. There is a risk that a gap will be created at the joint surface due to wear or chipping, and uncut parts will appear on the workpiece surface, which will greatly deteriorate the accuracy of the workpiece surface and significantly shorten the tool life.
また、特公昭54−6420号公報による超硬ドリルの
ようにV字状部の頂角面に水平部を設けたものにおいて
も、水平面部5がドリル外周両面の同位置に形成される
から前記した超硬ドリルと同様の不具合を有し、先端切
刃と外周側切刃とが共に切削作用するエンドミル切削に
は適さないものである。Further, even in a carbide drill according to Japanese Patent Publication No. 54-6420, in which a horizontal portion is provided on the apex surface of the V-shaped portion, the horizontal surface portion 5 is formed at the same position on both sides of the outer periphery of the drill. It has the same problems as the carbide drill described above, and is not suitable for end mill cutting in which both the tip cutting edge and the outer peripheral cutting edge perform cutting operations.
[発明の目的コ
本発明は、上記した問題点に鑑みなしたもので、工具剛
性がきわめて高く、高能率切削が可能なムクの超硬合金
を鋼製のシャンクに接合して前記超硬合金側からシャン
クにかけて切刃を形成した金型なと難削材の深彫り切削
に適合する工具において、前記鋼製シャンクと超硬合金
との接合面部を改良して、切刃を切削に関与させても被
削面に削り残し部分を生じさせず、きわめて精度の高い
被削面が得られ、しかも鋼製シャンクと超硬合金との接
合強度が高く工具寿命を大きく延命できる転削工具を提
供することを目的とするものである。[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and is made by joining a solid cemented carbide, which has extremely high tool rigidity and is capable of high-efficiency cutting, to a steel shank. In a tool that is suitable for deep cutting of difficult-to-cut materials such as a mold in which a cutting edge is formed from the side to the shank, the joint surface between the steel shank and the cemented carbide is improved to allow the cutting edge to participate in cutting. To provide a milling tool which can obtain an extremely high-precision cut surface without leaving any uncut parts on the cut surface even when cutting, has a high bonding strength between a steel shank and a cemented carbide, and can greatly extend the tool life. The purpose is to
[問題点を解決するための手段」
本発明は、前々記した問題点を下記する手段によって解
決したものである。[Means for Solving the Problems] The present invention solves the above-mentioned problems by the following means.
すなわち、鋼製シャンクのチップ座にチップをロウ付け
し、前記シャンクの端部に超硬合金をロウ付け接合した
転削工具であって、端部の超硬合金から前記チップ座の
チップにかけて切刃が形成され、シャンク端面と超硬合
金との端面の接合部の形状をシャンク端面側を略V字状
に切欠き、超硬合金の端面側を前記切欠きに対応した略
V字状の凸部とさせ、かつ前記凸部の両側に段差を有し
た平面を形成し、これらをロウ付け接合するなあたって
シャンクのチップ座にあるチップの端面を前記超硬合金
の凸部両側に形成した平面に当接または近接させるよう
にして接合させたものである。That is, it is a milling tool in which a chip is brazed to the chip seat of a steel shank, and a cemented carbide is brazed to the end of the shank, and the cutting is performed from the cemented carbide at the end to the chip of the chip seat. A blade is formed, and the shape of the joint between the shank end face and the end face of the cemented carbide is made by cutting the shank end face side into a substantially V-shape, and cutting the end face side of the cemented carbide into a substantially V-shape corresponding to the notch. A flat surface having a convex portion and a step on both sides of the convex portion is formed, and before joining these by brazing, the end face of the chip located in the chip seat of the shank is formed on both sides of the convex portion of the cemented carbide. They are joined so that they are in contact with or close to a plane.
[発明の作用コ
本発明は、上記した手段によって、超硬合金側に形成す
る平面と鋼製シャンクのチップ座にロウ付け接合された
チップの端面とが、この工具の軸芯に対してはゾ直角な
面同志で接合され、接合部のバックメタルの強度を大巾
に高めて切削負荷に対して無理なく耐ええられるように
なると、チップの破損や欠損を防止する。[Operation of the Invention] The present invention uses the above-described means to ensure that the plane formed on the cemented carbide side and the end face of the tip brazed to the tip seat of the steel shank are aligned with respect to the axis of the tool. They are joined with perpendicular surfaces, and the strength of the back metal at the joint is greatly increased so that it can easily withstand the cutting load, preventing chip breakage or chipping.
しかも、該シャンクのチップ座にあるチップは端部まで
ロウ層がいきわたりロウ付は強度も大きく高め゛不側の
外的負荷が加えられてもチップ座からチップの剥離する
ことを減じさせる。In addition, the solder layer extends to the end of the chip in the chip seat of the shank, and brazing greatly increases the strength and reduces peeling of the chip from the chip seat even if an external load is applied.
また、前記チップを当接あるいは近接させる超硬合金に
設けた略■字状の凸部の両側にある平面は、段差を有し
て設けられているのでチップの平面側にあるそれぞれの
端面は、工具の軸方向に対して位置を異にして配置され
ており、該チップ切刃と超硬合金切刃の端面接合部は、
前記した段差分だけ工具軸方向で接合位置が変移してい
るしたがって、切削時においては一方の接合部分は他の
切刃が切削し、他の接合部分は一方の切刃で切削するよ
うになって被削面に削り残し部分を生じさせないものと
なる。In addition, since the flat surfaces on both sides of the substantially ■-shaped convex portion provided on the cemented carbide that the chip contacts or approaches are stepped, each end face on the flat side of the chip is , are arranged at different positions with respect to the axial direction of the tool, and the end surface joint between the chip cutting edge and the cemented carbide cutting edge is
The joint position shifts in the tool axis direction by the step difference mentioned above. Therefore, during cutting, one joint part is cut by the other cutting blade, and the other joint part is cut by one cutting blade. This prevents any uncut parts from being left on the machined surface.
[実施例コ 以下、添付した図面にもとづいて実施例を説明する。[Example code] Hereinafter, embodiments will be described based on the attached drawings.
図は、いずれも本発明になる転削工具を示したもので、
第1図は正面図、第2図は第1図の底面図、第3図は第
1図の右側図、第4図は第1図のB−B断面図、第5図
は鋼製シャンクの一部を断面した要部を示したもので、
その(a)は正面図、(b)は(a)の底面図、(c)
は(a)の右側図、第6図は超硬合金製先端部を示した
もので、その(a)は(b)の上面図、(b)は正面図
、(c)は(b)の右側図などである。The figures all show milling tools according to the present invention.
Figure 1 is a front view, Figure 2 is a bottom view of Figure 1, Figure 3 is a right side view of Figure 1, Figure 4 is a sectional view taken along line B-B in Figure 1, and Figure 5 is a steel shank. This is a cross-section showing the main part of
(a) is a front view, (b) is a bottom view of (a), (c)
is the right side view of (a), and Figure 6 shows the cemented carbide tip, of which (a) is a top view of (b), (b) is a front view, and (c) is For example, the right side view.
図において、鋼製のシャンク本体1の一方の端部側に所
定のリードを付与した切屑排出用のねじれ溝11a、l
lbが設けられ、この溝の工具回転後方側には前記溝リ
ドと略同リードを有するチップ座12a12bが軸方向
に形成され、該チップ座へは、ねじれチップ2a、2b
をロウ付け接合するものである。In the figure, twisted grooves 11a and 11a for discharging chips are provided with a predetermined lead on one end side of a steel shank body 1.
A chip seat 12a12b having substantially the same lead as the groove lead is formed in the axial direction on the rear side of this groove when the tool rotates, and twisted chips 2a, 2b are connected to the chip seat.
These are joined by brazing.
前記したシャンク本体の端面側は第5図(a)(b)(
c)に示すように、工具軸中心部0を頂角とした略V字
状の切欠き13が設けられている。The end surface side of the shank body described above is shown in FIGS.
As shown in c), a substantially V-shaped notch 13 having an apex angle at the center 0 of the tool shaft is provided.
上記した切欠き13に嵌合させてロウ付は接合する超硬
合金製先端部3は、第6図の(a)(b)(c)に示し
たように上面側に前記した切欠き13に嵌合可能とする
v字状凸部31が設けられ、該V字状凸部の頂部32の
両側には平面33a、33bが形成されて入る。The cemented carbide tip 3 that is fitted into the notch 13 described above and joined by brazing is connected to the notch 13 on the upper surface side as shown in FIGS. 6(a), (b), and (c). A V-shaped protrusion 31 that can be fitted is provided, and flat surfaces 33a and 33b are formed on both sides of the top 32 of the V-shaped protrusion.
この平面33a、33bの位置関係は、頂部32に対し
て平面33aを所定値H(実施例は1.8mm)低く形
成し、平面33bは前記平面33aより所定値h(実施
例1.8mm)分だけ深くして段差を有するように形成
されている。The positional relationship between the planes 33a and 33b is such that the plane 33a is lower by a predetermined value H (1.8 mm in the embodiment) than the top 32, and the plane 33b is lower by a predetermined value H (1.8 mm in the embodiment) than the plane 33a. It is formed to have a step that is deepened by the same amount.
上記のように形成されたシャンク本体1と超硬合金製先
端部3とは、シャンクに設けた切欠き13と超硬合金製
先端部に形成したV字状凸部31との間に銅板などを介
在させ、また介在物を用いれずにロウ付け接合する。The shank body 1 and the cemented carbide tip 3 formed as described above have a copper plate or the like between the notch 13 provided in the shank and the V-shaped protrusion 31 formed in the cemented carbide tip. It is also possible to braze and join without using an intervening material.
このようにして接合した後、該シャンクのチップ座12
a、12bへはねじれチップ2a、2bの先端面21a
、21bを超硬合金製先端部3に設けた平面33a、3
3bに当接、または近接させるようにしてロウ付け接合
する。After joining in this way, the chip seat 12 of the shank is
a, 12b are the tip surfaces 21a of the twisted tips 2a, 2b.
, 21b are provided on the cemented carbide tip 3.
3b, so as to be brought into contact with or close to it, and to be joined by brazing.
なお、以上の実施例においては、シャンクに超硬合金製
先端部をロウ付け接合した後に、チップ2a、2bをチ
ップ座12a12bにロウ付け接合したが、これを予シ
ャンクの該チップ座に該チップをロウ付は接合してから
超硬合金製先端部とシャンクにロウ付け接合させてもよ
い。In the above embodiment, the tips 2a and 2b were brazed to the tip seat 12a12b after the cemented carbide tip was brazed to the shank. It is also possible to braze the parts and then braze them to the cemented carbide tip and shank.
上記のようになした転削工具Aは、研削機械にチャッキ
ングして該機械によって工具Aに逃げ面22a、22b
とすくい面23a、23bおよび切刃24a、4bを研
削形成するものである。The milling tool A made as described above is chucked into a grinding machine, and the machine cuts the flanks 22a, 22b into the tool A.
The rake faces 23a, 23b and cutting edges 24a, 4b are formed by grinding.
この実施例は、ボールエンドミルを例に説明したが、こ
れをエンドミルまたはドリリルなどの転削工具あるいは
切刃にリードを有さない直線状外周切刃を形成した転削
工具、およびシャンク本体と一体的に切刃が形成されて
いる転削工具に用いてもよいことは云うまでもない。This embodiment has been explained using a ball end mill as an example, but this can also be applied to a milling tool such as an end mill or a drill, or a milling tool whose cutting edge has a straight peripheral cutting edge without a lead, and which is integrated with a shank body. Needless to say, the cutting tool may be used in a milling tool having a cutting edge formed thereon.
[発明の効果」
本発明は、以上述べた構成によって、超硬合金製先端部
側に形成した平面とシャンク本体のチップ座にあるチッ
プの端部とが、この工具の軸芯に対してはダ直角な面同
志で接合されるから、接合部のバックメタルの強度が大
巾に高まり、断続的に受ける過酷な切削負荷にも耐えら
れるようになり切刃の破損や欠損を防止できた。[Effects of the Invention] The present invention has the configuration described above, so that the plane formed on the cemented carbide tip side and the end of the tip in the tip seat of the shank body are aligned with respect to the axis of the tool. Because they are joined with perpendicular surfaces, the strength of the back metal at the joint is greatly increased, allowing it to withstand intermittent severe cutting loads and preventing breakage or chipping of the cutting edge.
また、前記シャンクのチップ座にあるチップは、端部ま
でロウ層がいきわたるようになって、ロウ付け強度を大
きく高め不測の事故による外部負荷が加えられてもチッ
プ座からチップの剥離することが極端に少なくなった。In addition, the solder layer spreads all the way to the end of the chip in the chip seat of the shank, greatly increasing the brazing strength and preventing the chip from peeling off from the chip seat even if an external load is applied due to an unexpected accident. It has become extremely low.
そして、チップ端面を当接または近接させる超硬合金製
先端部に設けた略V字状凸部の両側にある平面が段差を
有して設けられているからチップの平面側にあるそれぞ
れの端面は、工具の軸方向に対して位置を異にして配置
されており、該端面接合部は前記段差分だけ工具の軸方
向で異なる位置にあるから切削時においては、一方の接
合部分を他の切刃が切削し、他の接合部分は一方の切刃
で切削するようになって被削面に削り残し部分を生じさ
せず精度の高い被削面が得られ、かつ接合部の摩耗を極
端に少なくさせて工具寿命を大きく延ばすなどの効果を
有する。Since the planes on both sides of the approximately V-shaped convex portion provided on the cemented carbide tip that bring the tip end surfaces into contact with or close to each other are provided with steps, each end surface on the plane side of the tip are arranged at different positions with respect to the axial direction of the tool, and the end surface joints are located at different positions in the axial direction of the tool by the step difference, so during cutting, one joint part is connected to the other. One cutting blade cuts the other joint, and one cutting blade cuts the other joint, resulting in a highly accurate work surface without leaving any uncut parts on the work surface, and extremely reducing wear on the joint. This has the effect of significantly extending tool life.
図は、いずれも本発明になる転削工具を示したもので、
第1図は正面図、第2図は第1図の底面図、第3図は第
1図の右側図、第4図は第1図のB−B断面図、第5図
は鋼製シャンクの一部を断面した要部を示したもので、
その(a)は正面図、(b)は(a)の底面図、(C)
は(a)の右側図、第6図は超硬合金製先端部を示した
もので、その(a)は(b)の上面図、(b)は正面図
、(c)は(b)の右側図などである。
1−m−シャンク本体 2a、2b〜−一チツプ 3−
m−超硬合金製先端部 12a、12bチツプ座 13
−m−切欠き21a、21b−−−チップ先端面 31
−〜− ■字状凸部 32−−−V字状凸部の頂部 3
3a、33b−−一平面
第 1
図The figures all show milling tools according to the present invention.
Figure 1 is a front view, Figure 2 is a bottom view of Figure 1, Figure 3 is a right side view of Figure 1, Figure 4 is a sectional view taken along line B-B in Figure 1, and Figure 5 is a steel shank. This is a cross-section showing the main part of
(a) is a front view, (b) is a bottom view of (a), (C)
is the right side view of (a), and Figure 6 shows the cemented carbide tip, of which (a) is a top view of (b), (b) is a front view, and (c) is For example, the right side view. 1-m-shank body 2a, 2b~-1 tip 3-
m-Cemented carbide tip 12a, 12b chip seat 13
-m-notches 21a, 21b---tip end surface 31
-~-■ Letter-shaped convex part 32---Top part of V-shaped convex part 3
3a, 33b--One plane Fig. 1
Claims (1)
記シャンクの端部に超硬合金をロ ウ付け接合した転削工具であつて、端部の 超硬合金から前記チップ座のチップにかけ て切刃が形成され、シャンク端面と超硬合 金の端面との接合部の形状をシャンク端面 側は略V字状に切欠き、超硬合金の端面側 を前記切欠きに対応した略V字状の凸部と させ、かつ前記凸部の両側に段差を有した 平面を形成し、これらをロウ付け接合する にあたつてシャンクのチップ座にあるチッ プの端面を前記超硬合金の凸部両側に形成 した平面に当接または近接させるようにし て接合させたことを特徴とするロウ付け式 転削工具。(1) A milling tool in which a tip is brazed to the tip seat of a steel shank, and a cemented carbide is brazed to the end of the shank, with the tip extending from the cemented carbide at the end to the tip of the tip seat. A cutting edge is formed, and the shape of the joint between the shank end face and the end face of the cemented carbide is a substantially V-shaped notch on the shank end face side, and a substantially V-shaped notch corresponding to the notch on the end face side of the cemented carbide. A convex portion of the cemented carbide is formed, and a plane with a step is formed on both sides of the convex portion, and when joining these by brazing, the end face of the chip in the chip seat of the shank is placed on both sides of the convex portion of the cemented carbide. A brazed milling tool characterized in that the tool is joined so as to be in contact with or in close proximity to a flat surface formed on the surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63335567A JP2817739B2 (en) | 1988-12-28 | 1988-12-28 | Brazing milling tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63335567A JP2817739B2 (en) | 1988-12-28 | 1988-12-28 | Brazing milling tool |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02180518A true JPH02180518A (en) | 1990-07-13 |
JP2817739B2 JP2817739B2 (en) | 1998-10-30 |
Family
ID=18290027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63335567A Expired - Fee Related JP2817739B2 (en) | 1988-12-28 | 1988-12-28 | Brazing milling tool |
Country Status (1)
Country | Link |
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JP (1) | JP2817739B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529621U (en) * | 1991-09-30 | 1993-04-20 | 東芝タンガロイ株式会社 | Rotary cutting tool |
JPH0529620U (en) * | 1991-09-26 | 1993-04-20 | 東芝タンガロイ株式会社 | Rotary cutting tool |
JPH0646815U (en) * | 1992-11-27 | 1994-06-28 | 三菱マテリアル株式会社 | Cutting tools |
US20140003873A1 (en) * | 2011-02-16 | 2014-01-02 | Hitachi Tool Engineering, Ltd. | End mill for cutting of high-hardness materials |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS546420A (en) * | 1977-06-17 | 1979-01-18 | Hitachi Ltd | Latency-time display unit |
JPS5537284U (en) * | 1978-09-01 | 1980-03-10 | ||
JPS58177213A (en) * | 1982-04-06 | 1983-10-17 | Nippon Oil & Fats Co Ltd | Rotary tool made of high hardness sintered material |
-
1988
- 1988-12-28 JP JP63335567A patent/JP2817739B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS546420A (en) * | 1977-06-17 | 1979-01-18 | Hitachi Ltd | Latency-time display unit |
JPS5537284U (en) * | 1978-09-01 | 1980-03-10 | ||
JPS58177213A (en) * | 1982-04-06 | 1983-10-17 | Nippon Oil & Fats Co Ltd | Rotary tool made of high hardness sintered material |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529620U (en) * | 1991-09-26 | 1993-04-20 | 東芝タンガロイ株式会社 | Rotary cutting tool |
JPH0529621U (en) * | 1991-09-30 | 1993-04-20 | 東芝タンガロイ株式会社 | Rotary cutting tool |
JPH0646815U (en) * | 1992-11-27 | 1994-06-28 | 三菱マテリアル株式会社 | Cutting tools |
US20140003873A1 (en) * | 2011-02-16 | 2014-01-02 | Hitachi Tool Engineering, Ltd. | End mill for cutting of high-hardness materials |
US9421624B2 (en) * | 2011-02-16 | 2016-08-23 | Hitachi Tool Engineering, Ltd. | End mill for cutting of high-hardness materials |
Also Published As
Publication number | Publication date |
---|---|
JP2817739B2 (en) | 1998-10-30 |
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