JPH0445206A - Manufacture of sintered hard alloy-made die - Google Patents
Manufacture of sintered hard alloy-made dieInfo
- Publication number
- JPH0445206A JPH0445206A JP15352490A JP15352490A JPH0445206A JP H0445206 A JPH0445206 A JP H0445206A JP 15352490 A JP15352490 A JP 15352490A JP 15352490 A JP15352490 A JP 15352490A JP H0445206 A JPH0445206 A JP H0445206A
- Authority
- JP
- Japan
- Prior art keywords
- die body
- mating faces
- machined
- air vent
- recessed grooves
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 230000013011 mating Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 238000005304 joining Methods 0.000 abstract description 2
- 238000013022 venting Methods 0.000 abstract 3
- 238000003754 machining Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Forging (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は冷間加工用金型などとして用いられる超硬合金
製ダイスの製造法の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in the manufacturing method of a cemented carbide die used as a cold working mold or the like.
（従来の技術）
冷間加工用の超硬合金製ダイスには、内部に発生する高
圧の空気を排出するために所定の部分に空気抜き孔を形
成しておくことが好ましい。このために従来は超硬合金
の原料粉末をダイス形状に圧縮成形し仮焼結した段階に
おいて、ボール盤、旋盤などによって０．２〜１．０謹
上度のドリルで孔あけを行なうか、焼結完了後に放電加
工により孔あけを行なう製造法が取られていた。(Prior Art) It is preferable that a cemented carbide die for cold working be provided with an air vent hole at a predetermined portion in order to exhaust high-pressure air generated inside. For this purpose, conventionally, the raw material powder of cemented carbide was compression molded into a die shape and pre-sintered, and then holes were drilled with a drill of 0.2 to 1.0 using a drill press, lathe, etc., or the sintering The manufacturing method used was to drill holes by electrical discharge machining after completion.
しかし超硬合金は仮焼結した段階においても極めて硬い
ために、細いドリルにより正確な孔あけを行うことは容
易ではなく、孔が曲がり易く目的とする位置に空気抜き
孔を形成できないこと、ドリルの摩耗が著しいこと、加
工時間がかかり加工コストがかかること等の問題があっ
た。また放電加工により孔あけを行なう場合にも、電極
の加工や放電加工に非常に高いコストがかかること、孔
あけした部分に油やカスが詰まり易いこと等の問題があ
った。However, since cemented carbide is extremely hard even in the pre-sintered stage, it is difficult to accurately drill holes with a thin drill. There were problems such as significant wear, long machining time, and high machining costs. Further, when drilling holes by electric discharge machining, there are problems such as extremely high costs for electrode machining and electric discharge machining, and the drilled portions are easily clogged with oil and debris.
（発明が解決しようとする課Ｗ５）
本発明は上記した従来の問題点を解決して、目的とする
位置に正確かつ容易に空気抜き孔を形成でき、しかもそ
の製造コストも安価な超硬合金製ダイスの製造法を提供
するために完成されたものである。(Problem W5 to be solved by the invention) The present invention solves the above-mentioned conventional problems, and makes it possible to form air vent holes accurately and easily at desired positions, and is made of cemented carbide, which is inexpensive to manufacture. It was completed to provide a method for manufacturing dice.
（課題を解決するための手段）
上記の課題を解決するために完成された本発明は、超硬
合金からなるダイス本体を複数の部分に分割して成形し
、その合わせ面の一方または双方に凹溝を加工したうえ
各部分を相互に密着させて接合し、凹溝を空気抜き孔と
することを特徴とするものである。(Means for Solving the Problems) The present invention, which was completed in order to solve the above problems, consists of molding a die body made of cemented carbide into a plurality of parts, and forming one or both of the mating surfaces. The feature is that the grooves are machined and the respective parts are closely joined to each other, and the grooves are used as air vent holes.
以下に本発明を図示の実施例によって更に詳細に説明す
る。The present invention will be explained in more detail below with reference to illustrated embodiments.
（実施例）
第１図において、（１）は超硬合金からなるダイス本体
であり、本発明においてはこのダイス本体（１）は相互
に密着する複数の部分（２）、（３）に分割されて成形
される。これらの複数に分割された部分（２）、（３）
は型の内部で超硬合金の原料粉末を圧縮成形する方法に
より成形されるが、例えば仮焼結を終了した段階におい
て、第２図に示されるように上側の部分（２）と下側の
部分（３）との合わせ面（４）、（５）に放射状の凹溝
（６）、（７）がそれぞれ加工される。この加工はホイ
ールまたは刃物により行われるが、従来のように細いド
リルを用いる場合に比較してきわめて容易に行うことが
できる。そして凹溝（６）、■が加工された後に各部分
（２）、（３）は合わせ面（４）、（５）を密着させて
本焼成され、相互に接合されたダイス本体（１）となる
。そしてこの結果、第１図に示すように合わせ面（４）
、（５）に形成されている凹溝（６）、（７）は空気抜
き孔（８）となる。(Example) In Fig. 1, (1) is a die body made of cemented carbide, and in the present invention, this die body (1) is divided into a plurality of parts (2) and (3) that are in close contact with each other. and molded. These multiple divided parts (2), (3)
is formed by compression molding raw material powder of cemented carbide inside a mold. For example, at the stage where preliminary sintering is completed, the upper part (2) and the lower part (2) are formed as shown in Figure 2. Radial grooves (6) and (7) are respectively machined on the mating surfaces (4) and (5) with the portion (3). This processing is performed using a wheel or a cutter, and is much easier than using a conventional thin drill. After the concave grooves (6) and ■ have been machined, each part (2) and (3) is fired with the mating surfaces (4) and (5) in close contact, and the die body (1) is joined together. becomes. As a result, as shown in Figure 1, the mating surface (4)
, (5) become air vent holes (8).
この実施例では両方の合わせ面（４）、（５）にそれぞ
れ凹溝（６）、（７）を加工し、両者を合わせて空気抜
き孔（８）としたが、第３図に示すようにいずれか片側
の合わせ面（５）だけに凹溝（７）を加工し、これを空
気抜き孔（８）とすることもできる。In this example, grooves (6) and (7) were formed on both mating surfaces (4) and (5), respectively, and the two were combined to form an air vent hole (8). It is also possible to machine a concave groove (7) only on one side of the mating surface (5) and use this as an air vent hole (8).
また凹溝（６）、（７）の加工は各部分（２）、（３）
を本焼成した後に行うことも可能である。このためには
まず本焼成された各部分（２）、（３）のそれぞれの上
下両端面を研摩して平行を出した後、合わせ面（４）、
（５）の一方または双方に凹溝（６）、（７）を加工す
ることが好ましい。その後に両者を密着させて再度焼成
し一体化させる。In addition, the machining of grooves (6) and (7) is done on each part (2) and (3).
It is also possible to perform this after the main firing. To do this, first, both the upper and lower end surfaces of the main fired parts (2) and (3) are polished to make them parallel, and then the mating surfaces (4),
It is preferable to form concave grooves (6) and (7) in one or both of (5). After that, the two are brought into close contact and fired again to integrate them.
（発明の効果）
以上に説明したように、本発明によれば超硬合金からな
るダイス本体を複数の部分に分割して成形し、その合わ
せ面に凹溝を加工したうえ各部分を相互に密着させて接
合して凹溝を空気抜き孔とするので、極めて正確にかつ
短時間で任意の位置に空気抜き孔を加工することができ
る。また本発明によれば、ドリルが折れたり孔が欠けた
りすることがなく、従来は加工が困難であった０、１謹
上度の径の空気抜き孔も容易に加工することができる。(Effects of the Invention) As explained above, according to the present invention, a die body made of cemented carbide is divided into a plurality of parts and molded, grooves are machined on the mating surfaces of the parts, and the parts are mutually connected. Since the concave grooves are made into air vent holes by closely joining them, the air vent holes can be formed at any desired position extremely accurately and in a short time. Further, according to the present invention, the drill does not break or the hole is chipped, and it is possible to easily machine an air vent hole having a diameter of 0 or 1, which was difficult to machine in the past.
このほか、本発明によれば断面形状が途中で変化する空
気抜き孔も自由に加工することが可能となる。In addition, according to the present invention, it is also possible to freely process air vent holes whose cross-sectional shape changes midway.
よって本発明は従来の問題点を解消した超硬合金製ダイ
スの製造法として、業界に寄与するところはきわめて大
きいものがある。Therefore, the present invention makes an extremely large contribution to the industry as a method for manufacturing cemented carbide dies that solves the problems of the conventional method.
第１図は本発明の方法により製造された超硬合金製ダイ
スの一例を示す断面図、第２図はその製造工程を説明す
る斜視図、第３図は他の実施例の製造工程を説明する斜
視図である。
（１） ： Ｉ硬合金からなるダイス本体、（２）、（
３）：部分、（４）、（５）：合わせ面、（６）、（７
）：凹溝、（８）：空気抜き孔。Fig. 1 is a sectional view showing an example of a cemented carbide die manufactured by the method of the present invention, Fig. 2 is a perspective view illustrating the manufacturing process thereof, and Fig. 3 is a sectional view illustrating the manufacturing process of another embodiment. FIG. (1): Die body made of I hard alloy, (2), (
3): part, (4), (5): mating surface, (6), (7
): Concave groove, (8): Air vent hole.
Claims (1)
、（３）に分割して成形し、その合わせ面（４）、（５
）の一方または双方に凹溝（６）、（７）を加工したう
え各部分（２）、（３）を相互に密着させて接合し、凹
溝（６）、（７）を空気抜き孔（８）とすることを特徴
とする超硬合金製ダイスの製造法。The die body (1) made of cemented carbide is divided into several parts (2)
, (3), and mold the mating surfaces (4) and (5).
) are machined with grooves (6) and (7) on one or both of them, and then the respective parts (2) and (3) are joined in close contact with each other, and grooves (6) and (7) are formed into air vent holes ( 8) A method for manufacturing a cemented carbide die, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2153524A JP2510764B2 (en) | 1990-06-12 | 1990-06-12 | Manufacturing method of cemented carbide die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2153524A JP2510764B2 (en) | 1990-06-12 | 1990-06-12 | Manufacturing method of cemented carbide die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0445206A true JPH0445206A (en) | 1992-02-14 |
| JP2510764B2 JP2510764B2 (en) | 1996-06-26 |
Family
ID=15564416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2153524A Expired - Fee Related JP2510764B2 (en) | 1990-06-12 | 1990-06-12 | Manufacturing method of cemented carbide die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2510764B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09308937A (en) * | 1996-05-20 | 1997-12-02 | Nippon Hardware Kk | Nib for forging die |
| CN104858346A (en) * | 2015-05-20 | 2015-08-26 | 江苏太平洋齿轮传动有限公司 | Degassing structure for shaft cold precision forging die |
| JP7249707B1 (en) * | 2022-10-26 | 2023-03-31 | 株式会社共立合金製作所 | Cemented Carbide Molded Body with Slotted Pores and Method for Manufacturing Same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5055972U (en) * | 1973-09-20 | 1975-05-27 | ||
| JPS5519644U (en) * | 1978-07-24 | 1980-02-07 | ||
| JPS6160805A (en) * | 1984-09-01 | 1986-03-28 | Yamaha Motor Co Ltd | Forming method of cylinder sleeve of two cycle engine |
-
1990
- 1990-06-12 JP JP2153524A patent/JP2510764B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5055972U (en) * | 1973-09-20 | 1975-05-27 | ||
| JPS5519644U (en) * | 1978-07-24 | 1980-02-07 | ||
| JPS6160805A (en) * | 1984-09-01 | 1986-03-28 | Yamaha Motor Co Ltd | Forming method of cylinder sleeve of two cycle engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09308937A (en) * | 1996-05-20 | 1997-12-02 | Nippon Hardware Kk | Nib for forging die |
| CN104858346A (en) * | 2015-05-20 | 2015-08-26 | 江苏太平洋齿轮传动有限公司 | Degassing structure for shaft cold precision forging die |
| JP7249707B1 (en) * | 2022-10-26 | 2023-03-31 | 株式会社共立合金製作所 | Cemented Carbide Molded Body with Slotted Pores and Method for Manufacturing Same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2510764B2 (en) | 1996-06-26 |
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