JPS63277702A - Production of drill raw material - Google Patents
Production of drill raw materialInfo
- Publication number
- JPS63277702A JPS63277702A JP61307508A JP30750886A JPS63277702A JP S63277702 A JPS63277702 A JP S63277702A JP 61307508 A JP61307508 A JP 61307508A JP 30750886 A JP30750886 A JP 30750886A JP S63277702 A JPS63277702 A JP S63277702A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- spiral
- powder
- raw material
- 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
- 239000002994 raw material Substances 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000009704 powder extrusion Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 9
- 238000005245 sintering Methods 0.000 abstract description 5
- 239000000919 ceramic Substances 0.000 abstract description 4
- 229910009043 WC-Co Inorganic materials 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000011195 cermet Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- -1 gold metal oxides Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/14—Making other products
- B21C23/147—Making drill blanks
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はドリル素材の製法に係わり、更に詳しくは外周
のスパイラル状の方形のみならず、陸部内のスパイラル
状の袖穴が極めて容易に形成できるドリル素材の製法に
関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a drill material, and more specifically, it is possible to extremely easily form not only a spiral rectangular hole on the outer periphery but also a spiral armhole hole in the land area. Regarding the manufacturing method of drill materials that can be made.
周知の通りドリルは、その外周面に所定角度のスパイラ
ル状の方形が形成されていると共に、その多くは陸部内
に切削油をドリル先端に供給する為の袖穴が形成されて
いる。As is well known, a drill has a spiral rectangle formed at a predetermined angle on its outer peripheral surface, and most of the drills have an armhole formed in the land portion for supplying cutting oil to the tip of the drill.
従来この為に幾つかの製法が実施されていて、その代表
的な製法は次の通りである。即ち、外周のスパイラル状
の方形形成に関しては、円筒状。Conventionally, several manufacturing methods have been used for this purpose, and the typical manufacturing methods are as follows. That is, regarding the spiral-shaped rectangular formation of the outer periphery, it is cylindrical.
棒状の超硬質材を成型、焼結し、この後ダイヤモンド工
具を用いて溝を加工し、刃付加工をしている。A rod-shaped ultra-hard material is molded and sintered, and then a diamond tool is used to cut grooves and create a blade.
又、陸部内の袖穴に関しては、その１つは、通常の工具
鋼から成るドリルの場合は、外周のスパイラル状の方形
を形成する以前に、先ず直線状の油孔を形成し、この後
ドリル素材をねじり、もってスパイラル状の油孔を形成
している。その２は、超硬材料から成るドリルの場合に
は特公昭６１−２２６２３１号にみられるように外周に
スパイラル状の溝を形成した内芯体を、外郭体に内挿し
、内芯体表面の溝と外郭体内周面との間にスパイラル状
の袖穴を形成し、以後外郭体の表面にスパイラル状の刃
をダイヤモンド工具を用いて形成している。Regarding side holes in the land area, one of them is that in the case of a drill made of ordinary tool steel, a straight oil hole is first formed before forming a spiral rectangular outer periphery, and then a straight oil hole is formed. The drill material is twisted to form a spiral oil hole. Second, in the case of a drill made of carbide material, an inner core body with a spiral groove formed on the outer periphery is inserted into an outer body, as shown in Japanese Patent Publication No. 61-226231, and the surface of the inner core body is A spiral armhole is formed between the groove and the inner peripheral surface of the outer shell, and thereafter a spiral blade is formed on the surface of the outer shell using a diamond tool.
上記従来技術によれば、■スパイラル状の方形形成に関
しては、ダイヤモンド工具を用いなければならないので
、刃付加工が高精度加工、複雑加工となり、その製造コ
スト低減化に限界が生じている。又■スパイラル状の油
孔に関しても、著しく製作工程が多く、その製造コスト
低減化に限界が生じている。従って本発明の目的とする
所は、０周面のスパイラル状の方形形成が容易であると
同時に、陸部内のスパイラル状の油孔の形成が容易であ
って、全体として極めて能率的に製造でき、低価格で市
場供給できるドリル素材の製法を提供するにある。According to the above-mentioned conventional technology, (1) since a diamond tool must be used for forming a spiral rectangle, the blade machining becomes a high-precision machining and a complicated machining, and there is a limit to the reduction in manufacturing costs. Also, regarding the spiral oil hole, the number of manufacturing steps is extremely large, and there is a limit to the reduction in manufacturing costs. Therefore, an object of the present invention is to facilitate the formation of a spiral rectangular shape on the 0 circumferential surface, and at the same time, to facilitate the formation of spiral oil holes in the land area, and to achieve extremely efficient manufacturing as a whole. The objective is to provide a manufacturing method for drill materials that can be supplied to the market at low prices.
〔問題点を解決する為の手段〕 〔作用〕上記目的を達
成する為に本発明は次の技術的手段を有する。[Means for Solving the Problems] [Operation] In order to achieve the above object, the present invention has the following technical means.
即ち実施例に対応する添付図面に示す実施例に於いて使
用した符号を用いて説明すると、本発明は超硬質材料よ
り成るドリルの製法に於いて；超硬質材料粉末及び必要
な助剤を原料として粉末押出成型法によりいったん一端
から他端迄の周面にスパイラル状の溝形を形成すると共
に、この時、同時に一端から他端迄の陸部内にスパイラ
ル状の孔を形成し１次いでこの一次成型素材を焼結して
、ドリル素材としたことを特徴とするドリル素材の製法
である。That is, to explain using the reference numerals used in the embodiments shown in the accompanying drawings corresponding to the embodiments, the present invention relates to a method for manufacturing a drill made of an ultra-hard material; First, a spiral groove is formed on the circumferential surface from one end to the other by a powder extrusion molding method, and at the same time, a spiral hole is formed in the land area from one end to the other. This method of manufacturing a drill material is characterized by sintering a molded material to obtain a drill material.
より具体的に説明すると、上記に於いて用いることので
きる超硬質材料粉末としては、常法通り、超硬合金粉末
（ＷＣ−Ｃｏ系、ＷＣ−Ｎｉ系、ＷＣ−ＴａＣ−Ｔｉｃ
−Ｃｏ系、ＷＣ−ＴａＣ−Ｔｉｃ−Ｎｉ系等）、いわゆ
るサーメット粉末（セラミックスとしてｒｖ、ｖ、ｖｒ
金金属酸化物、炭化物、けい化物、はう化物、窒化物な
どの粉末を用い、これに金属としてコバルト、ニッケル
鉄などの粉末を入れて混合し、真空中その他適当な保護
ガス中で焼結した粒子）、あるいは５ｉＣ−Ｎ ｔ 、
Ｓ ｔＮ−Ｎ等のセラミ−７り系超硬質材料粉末を用
いることができる。そしてこれらの原料粉末に必要なワ
ックス等の助剤を混合し、これら粉末を粉末押出成型機
により押出し、即ち、加工すべきドリルの方形の形状を
した金型から加圧して押出し、一端から他端迄その周面
に連続してスパイラル状に溝が加圧成形されると共に、
陸部内にスパイラル状の孔が形成された一次素材を得る
。陸部内にスパイラル状の孔を形成する為には、上記金
型内に孔径相当の棒を配しておけばよい。上記に於いて
ワックスの量は通常よりもやや多くして、成型し易い粘
性に富ましめてる方がよい。To explain more specifically, as the ultrahard material powder that can be used in the above, as usual, cemented carbide powder (WC-Co series, WC-Ni series, WC-TaC-Tic
-Co type, WC-TaC-Tic-Ni type, etc.), so-called cermet powder (rv, v, vr as ceramics)
Using powders such as gold metal oxides, carbides, silicides, ferrides, nitrides, etc., powders of cobalt, nickel iron, etc. are added as metals, mixed, and sintered in a vacuum or other suitable protective gas. particles), or 5iC-N t ,
Ceramic ultra-hard material powder such as S tN-N can be used. Then, necessary auxiliary agents such as wax are mixed with these raw material powders, and these powders are extruded using a powder extrusion molding machine, that is, extruded under pressure from a rectangular mold of the drill to be processed, and extruded from one end to the other. A continuous spiral groove is formed on the circumference up to the edge, and
A primary material in which spiral pores are formed in the land portion is obtained. In order to form a spiral hole in the land portion, a rod corresponding to the diameter of the hole may be placed in the mold. In the above, it is better to use a slightly larger amount of wax than usual to make it more viscous and easier to mold.
且つ孔は、陸部内の中心に１本スパイラル状に形成して
もよいが、ドリルの先端の２つの逃げ面各々に開口する
２本のスパイラル状の孔としてもよい。In addition, one hole may be formed in a spiral shape at the center of the land portion, but two spiral holes may be formed in each of the two flanks at the tip of the drill.
次に添付図面に従い本発明の好適な実施例を詳細に説明
する。Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
先ず粉末押出成型機のシリンダ端部の排出端に外周にス
パイラル状の刃が形成されると共に、陸部内にスパイラ
ル状の孔が形成される金型をセットする。First, a mold is set in which a spiral blade is formed on the outer periphery at the discharge end of the cylinder end of a powder extrusion molding machine, and a spiral hole is formed in the land portion.
上記スパイラル状の孔に関しては、金型内に、孔の径に
相当する外径をもつ棒を配しておけばよく、この実施例
では、ドリルの先端の２つの逃げ面各々に２木のスパイ
ラル状の孔を形成する例を示しであるので、２木の棒が
配されている。Regarding the above-mentioned spiral hole, it is sufficient to arrange a rod with an outer diameter corresponding to the diameter of the hole in the mold. Since this is an example of forming a spiral hole, two wooden rods are arranged.
さて、この後、粉末押出成型機のホッパ内に、超硬質合
金粉末やサーメット粉末、セラミックス粉末等の超硬質
材料粉末とワックス等の助剤を混合した成型材料を投入
し、これを上記金型から押出す、押出される時に、これ
らの粉末材料が金型の所でスパイラル状にねじられて押
出され、外周にスパイラル状の溝Ａが形成されると共に
、陸部内にスパイラル状の孔Ｂ、Ｃが形成される。これ
により第１図に示す如く１次成型素材１が得られる。After this, a molding material made by mixing ultra-hard material powder such as ultra-hard alloy powder, cermet powder, and ceramic powder with auxiliary agents such as wax is put into the hopper of the powder extrusion molding machine, and this is poured into the mold described above. When being extruded, these powder materials are twisted into a spiral shape at the mold and extruded, forming a spiral groove A on the outer periphery and a spiral hole B in the land part. C is formed. As a result, a primary molding material 1 is obtained as shown in FIG.
これを第２図に示す如く、粉末材料の焼結温度で焼結し
、焼結素材２を得る。続いて、加工すべきドリルの全長
に合う単位長さくＬ）各に切断して第３図に示すように
単位焼結体３を得る。As shown in FIG. 2, this is sintered at the sintering temperature of the powder material to obtain a sintered material 2. Subsequently, it is cut into unit lengths L) that match the total length of the drill to be machined to obtain unit sintered bodies 3 as shown in FIG.
上記１つ１つの単位焼結体３には外周にスパイラル状の
溝Ａが形成され、且つ陸部内にスパイラル状の孔Ｂ、Ｃ
が形成されている。これによってドリル素材が得られる
。以後第４図に示す如く、必要なシャンク４を形成する
と共に、溝Ａ部分の研削、研磨を成し且つ先端の逃げ面
５．６あるいは切粉排出溝７を二次加工すればドリルが
完成する。上記シャンク４の形成方法は、シャンクとな
るべき溝Ａ部分に鉄系金属を埋める等して製作すればよ
くその製法は問わな、い。A spiral groove A is formed on the outer periphery of each unit sintered body 3, and spiral holes B and C are formed in the land portion.
is formed. This yields a drill material. Thereafter, as shown in Fig. 4, the drill is completed by forming the necessary shank 4, grinding and polishing the groove A part, and secondary machining the flank 5.6 at the tip or the chip discharge groove 7. do. The shank 4 may be formed by any method as long as it is manufactured by filling the groove A, which is to become the shank, with iron-based metal.
又上記に於いては、押出された全体を焼結してから、単
位長さに切断する例を示したが、焼結前に切断してから
単位焼結素材としてもよい。Further, in the above, an example was shown in which the entire extruded material is sintered and then cut into unit lengths, but it may be cut before sintering to produce unit sintered materials.
以上詳述した如く、この発明によれば、粉末押出成型法
により、いったん一端から他端迄の周面にスパイラル状
の溝形を形成すると共に、同時に一端から他端迄の陸部
内にスパイラル状の孔を形成し、次いでこの一次素材を
焼結してドリル素材とするので、外周のスパイラル状の
刃の形成が極めて容易且つ能率的に製作できると共に、
同時に袖穴も極めて容易且つ能率的に製作できるもので
あって、全体の製作能率が良好である。As described in detail above, according to the present invention, a spiral groove is formed on the circumferential surface from one end to the other end by a powder extrusion method, and at the same time, a spiral groove is formed in the land portion from one end to the other end. This primary material is then sintered to form a drill material, making it extremely easy and efficient to form a spiral blade on the outer periphery.
At the same time, the sleeve holes can be manufactured very easily and efficiently, and the overall manufacturing efficiency is good.
添付図面は本発明の実施例を示し第１図は成型後のドリ
ル素材の図、第２図は焼結後のドリル素材の図、第３図
は単位長さに切断した後のドリル素材の図であり、図中
Ａは溝、Ｂ、Ｃは袖穴である。
手続補正書Ｃ″ｊ５効
１ 事件の表示
ドリル素材の製法
３ 補正をする者
事件との関係 特許出願人
住 所 東京都町田市本町田３５９９の４９氏名 小
林 義信
４ 代理人 〒２２０
住 所 横浜市西区高島２丁目１１番２号手取たン
山１４ミ（１Ｆ（方式）
％式％
２ 発明の名称
ドリル素材の製法
３ 補正をする者
“１を件との関係 特許出願人
住 所 東京都町田市本町田３５９９の４９氏名 小
林 義信
４ 代理人 〒２２０
住 所 横浜市西区高島２ ｒ−１＋ １１番２す５
補正命令の日付 昭和６３年５ＪＪ３１［］６
補正の対象
明細書の「図面の簡単な説明」の欄
７ 補正の内容
明細書８頁９行の「素材の図であり、図中Ａは溝、Ｂ、
Ｃは袖穴であ」を次のように補正する。
「素材の図、第４図は完成したドリル素材の図であり、
図中Δ（ｉ’Ｃは２堵≦至ビ℃シ）方式The attached drawings show examples of the present invention, and Fig. 1 shows the drill material after molding, Fig. 2 shows the drill material after sintering, and Fig. 3 shows the drill material after cutting into unit lengths. In the figure, A is a groove, and B and C are sleeve holes. Procedural amendment C″j5 Effect 1 Display of the case Manufacturing method of drill material 3 Person making the amendment Relationship with the case Patent applicant Address 49, 3599 Honmachida, Machida City, Tokyo Yoshinobu Kobayashi 4 Agent 220 Address Yokohama City 2-11-2 Takashima, Nishi-ku, Tedoritanyama 14mi (1F (method) % formula % 2 Name of the invention Method for manufacturing drill material 3 Person making the amendment Relationship to the matter Patent applicant address Machida, Tokyo 49, 3599 Machida, Honma Name Yoshinobu Kobayashi 4 Agent 220 Address 2 R-1+ 11-25 Takashima, Nishi-ku, Yokohama
Date of amendment order: 5JJ31, 1988 []6
Column 7 of "Brief explanation of drawings" in the specification subject to amendment. On page 8, line 9 of the specification of the contents of the amendment, "A is a diagram of the material, in which A is a groove, B is a groove,
"C is a sleeve hole" is corrected as follows. "Material drawing, Figure 4 is a diagram of the completed drill material,
In the figure, Δ (i'C is 2≦to Bi℃) method
Claims (1)
粉末及び必要な助剤を原料として粉末押出成型法により
いったん一端から他端迄の周面にスパイラル状の溝形を
形成すると共に、この時、同時に一端から他端迄の陸部
内にスパイラル状の孔を形成し、次いでこの一次成型素
材を焼結して、ドリル素材としたことを特徴とするドリ
ル素材の製法。In the manufacturing method of a drill made of ultra-hard material, a spiral groove shape is formed on the circumferential surface from one end to the other end by powder extrusion molding using ultra-hard material powder and necessary auxiliary materials as raw materials. At the same time, a spiral hole is formed in the land portion from one end to the other, and then this primary molded material is sintered to obtain a drill material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307508A JPS63277702A (en) | 1986-12-23 | 1986-12-23 | Production of drill raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307508A JPS63277702A (en) | 1986-12-23 | 1986-12-23 | Production of drill raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63277702A true JPS63277702A (en) | 1988-11-15 |
| JPH026802B2 JPH026802B2 (en) | 1990-02-14 |
Family
ID=17969920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61307508A Granted JPS63277702A (en) | 1986-12-23 | 1986-12-23 | Production of drill raw material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63277702A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262496A (en) * | 2016-12-31 | 2018-07-10 | 上海精韧激光科技有限公司 | Cutting green body and its forming method and purposes made of powder metallurgy |
| CN108262482A (en) * | 2016-12-31 | 2018-07-10 | 上海精韧激光科技有限公司 | Hard material green body and its manufacturing method and purposes |
| CN108262481A (en) * | 2016-12-31 | 2018-07-10 | 上海名古屋精密工具股份有限公司 | Green body made of powder metallurgy and its forming method and purposes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54159791A (en) * | 1978-06-08 | 1979-12-17 | Daijietsuto Kougiyou Kk | Cemented carbide twist drill with refrigerant passage |
| JPS61227101A (en) * | 1985-03-29 | 1986-10-09 | Mitsubishi Metal Corp | Extrusion molding machine |
-
1986
- 1986-12-23 JP JP61307508A patent/JPS63277702A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54159791A (en) * | 1978-06-08 | 1979-12-17 | Daijietsuto Kougiyou Kk | Cemented carbide twist drill with refrigerant passage |
| JPS61227101A (en) * | 1985-03-29 | 1986-10-09 | Mitsubishi Metal Corp | Extrusion molding machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108262496A (en) * | 2016-12-31 | 2018-07-10 | 上海精韧激光科技有限公司 | Cutting green body and its forming method and purposes made of powder metallurgy |
| CN108262482A (en) * | 2016-12-31 | 2018-07-10 | 上海精韧激光科技有限公司 | Hard material green body and its manufacturing method and purposes |
| CN108262481A (en) * | 2016-12-31 | 2018-07-10 | 上海名古屋精密工具股份有限公司 | Green body made of powder metallurgy and its forming method and purposes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH026802B2 (en) | 1990-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4813823A (en) | Drilling tool formed of a core-and-casing assembly | |
| JPH03183705A (en) | Manufacture of material having hole in its interior and metal die for extrusion molding | |
| JP5885710B2 (en) | Compound cutting edge insert and method for producing the same | |
| KR101317017B1 (en) | Composite article with coolant channels and tool fabrication method | |
| CN102459667B (en) | composite cemented carbide rotary cutting tools and rotary cutting tool blanks | |
| US5273379A (en) | Blank material for drill and drill therefrom | |
| US20160263665A1 (en) | Composite blanks and tooling for cutting applications | |
| CN109396450A (en) | A method of solid carbide thread is processed by semi-finished product processing method | |
| CN101537559B (en) | Manufacturing method for diamond tool | |
| CN107952965A (en) | Hexagonal red needle and the preparation method of syringe needle in a kind of plum blossom | |
| JPS6048207A (en) | Ultra-hard drill and its manufacture | |
| JPS63277702A (en) | Production of drill raw material | |
| JPH024905A (en) | Revolving cutting tool of drill, end mill or the like and manufacture thereof | |
| CN1328027C (en) | Method for processing crystal combination diamond and products thereof | |
| JPH04191304A (en) | Method for extruding hard material | |
| JPH01153229A (en) | Method for producing sintered hard alloy tool | |
| CN218581568U (en) | Reduce inner core package assembly of external grinding cost | |
| JPS63134129A (en) | Manufacture of cemented carbide tool | |
| JP2007211259A (en) | Method of molding metal powder and working tool molded by the molding method | |
| JPH01153230A (en) | Manufacture of carbide tool | |
| JPH0892607A (en) | Production of composite hard material | |
| JPS63109908A (en) | Twist drill with oil hole and its manufacturing | |
| JP4338881B2 (en) | Manufacturing method of composite torsion sintered body | |
| JPS63200923A (en) | Manufacture of carbide tool having plastic shank | |
| JPS63180427A (en) | Manufacture of superhard tool |