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JP2510764B2 - Manufacturing method of cemented carbide die - Google Patents

Manufacturing method of cemented carbide die

Info

Publication number
JP2510764B2
JP2510764B2 JP2153524A JP15352490A JP2510764B2 JP 2510764 B2 JP2510764 B2 JP 2510764B2 JP 2153524 A JP2153524 A JP 2153524A JP 15352490 A JP15352490 A JP 15352490A JP 2510764 B2 JP2510764 B2 JP 2510764B2
Authority
JP
Japan
Prior art keywords
cemented carbide
air vent
manufacturing
groove
vent hole
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.)
Expired - Fee Related
Application number
JP2153524A
Other languages
Japanese (ja)
Other versions
JPH0445206A (en
Inventor
弘 梶野
博岳 木俣
雅文 高橋
千秋 高見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aoyama Seisakusho Co Ltd
Original Assignee
Aoyama Seisakusho Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aoyama Seisakusho Co Ltd filed Critical Aoyama Seisakusho Co Ltd
Priority to JP2153524A priority Critical patent/JP2510764B2/en
Publication of JPH0445206A publication Critical patent/JPH0445206A/en
Application granted granted Critical
Publication of JP2510764B2 publication Critical patent/JP2510764B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Forging (AREA)
  • Powder Metallurgy (AREA)

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 (Field of Industrial Use) The present invention relates to an improvement in a method for producing a cemented carbide die used as a die for cold working and 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0.2〜1.0mm程度
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) In a cemented carbide die for cold working, it is preferable to form an air vent hole at a predetermined portion in order to discharge high-pressure air generated inside. For this reason, conventionally, at the stage where the raw material powder of cemented carbide was compression molded into a die shape and pre-sintered, a drill of 0.2 to 1.0 mm was used to drill a hole with a drilling machine, lathe, etc. The manufacturing method of making holes was adopted.

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 at the stage of pre-sintering, it is not easy to make a precise hole with a fine drill, the hole is easily bent, and the air vent hole cannot be formed at the target position. There are problems such as significant wear, processing time and processing cost. Further, even when the holes are formed by the electric discharge machining, there are problems that the machining of the electrodes and the electric discharge machining require a very high cost, and that the holes are easily clogged with oil or dust.

(発明が解決しようとする課題) 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方法を
提供するために完成されたものである。
(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems of the related art, and can form an air vent hole accurately and easily at a target position, and further, the manufacturing cost thereof is low, and the die is made of cemented carbide. It has been completed to provide a manufacturing method of.

(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
硬合金からなる肉厚円筒状のダイス本体を内径が変化す
る位置で複数の部分に分割して成形し、その合わせ面の
一方または双方にホイールまたは刃物により細幅の凹溝
を放射状に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 completed to solve the above problems is to divide a thick-walled cylindrical die body made of cemented carbide into a plurality of parts at positions where the inner diameter changes. Characterized by forming a narrow groove radially with a wheel or a blade on one or both of the mating surfaces and then adhering each part in close contact with each other to form an air vent hole Is.

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。
Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.

(実施例) 第1図において、(1)は超硬合金からなる肉厚円筒
状のダイス本体であり、本発明においては、このダイス
本体(1)は図1に示すとおり内径が変化する位置で相
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)にホイー
ルまたは刃物により細幅の放射状の凹溝(6)、(7)
がそれぞれ加工される。このホイールまたは刃物による
加工は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)、
(7)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)は細径の空気抜き孔(8)とな
る。そしてこの空気抜き孔(8)はダイス本体(1)の
内径が変化する部分に形成されることとなる。
(Example) In FIG. 1, (1) is a thick-walled cylindrical die body made of cemented carbide, and in the present invention, this die body (1) is at a position where the inner diameter changes as shown in FIG. Is divided into a plurality of parts (2) and (3) that are in close contact with each other and molded. These divided parts (2),
(3) is molded by a method of compression-molding the raw material powder of cemented carbide inside the mold. For example, at the stage where calcination is completed, as shown in FIG. Narrow radial grooves (6), (7) on the mating surfaces (4), (5) with the lower part (3) by a wheel or a blade.
Are processed respectively. The machining with the wheel or the cutter can be performed extremely easily as compared with the conventional case where a thin drill is used. And the groove (6),
After the step (7) is processed, the parts (2) and (3) are main-baked with the mating surfaces (4) and (5) in close contact with each other to form the die body (1) bonded to each other. And as a result, the first
As shown in the figure, the concave grooves (6) and (7) formed in the mating surfaces (4) and (5) serve as air vent holes (8) having a small diameter. And this air vent hole (8) will be formed in the portion where the inner diameter of the die body (1) changes.

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 embodiment, concave grooves (6) and (7) are machined in both mating surfaces (4) and (5), respectively, and both are combined to form an air vent hole (8), but as shown in FIG. It is also possible to form the concave groove (7) only on one of the mating surfaces (5) and use this as the air vent hole (8).

また凹溝(6)、(7)の加工は、各部分(2)、
(3)に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。
Further, the processing of the concave grooves (6) and (7) is performed by the respective portions (2),
It is also possible to perform after the main firing in (3). For this purpose, first, the upper and lower end surfaces of each of the main-baked portions (2) and (3) are ground to make them parallel, and then one or both of the mating surfaces (4) and (5) have a groove. (6), (7)
Is preferably processed. After that, they are brought into close contact with each other and baked again to be integrated.

(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
なるダイス本体を内径が変化する部分で複数の部分に分
割して成形し、その合わせ面にホイールまたは刃物によ
り細幅の凹溝を放射状に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空気抜きに適した位置に空気抜き孔
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0.1mm程度の径の空気抜き孔も容易に加工
することができる。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。
(Effects of the Invention) As described above, according to the present invention, a die body made of cemented carbide is divided into a plurality of parts at a portion where the inner diameter changes, and the die body is finely divided by a wheel or a blade. Since the concave groove of the width is processed radially and the parts are brought into close contact with each other and joined to make the concave groove an air vent hole, it is possible to process the air vent hole at a position suitable for air venting extremely accurately and in a short time. it can. Further, according to the present invention, the drill is not broken or the hole is not chipped, and an air vent hole having a diameter of about 0.1 mm, which has been difficult to process conventionally, can be easily processed. In addition, according to the present invention, the air vent hole whose cross-sectional shape changes in the middle can be freely processed.

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 has an extremely great contribution to the industry as a method for manufacturing a cemented carbide die that solves the conventional problems.

【図面の簡単な説明】[Brief description of drawings]

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):超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 cross-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 manufacturing process of another embodiment. FIG. (1): Die body made of cemented carbide, (2),
(3): part, (4), (5): mating surface, (6),
(7): concave groove, (8): air vent hole.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 高見 千秋 兵庫県加西市広原町518番地の2 (56)参考文献 特開 昭61−60805(JP,A) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Chiaki Takami 2 of 518, Hirohara-cho, Kasai City, Hyogo Prefecture (56) References JP 61-60805 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】超硬合金からなる肉厚円筒状のダイス本体
(1)を内径が変化する位置で複数の部分(2)、
(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ホイールまたは刃物により細幅の凹
溝(6)、(7)を放射状に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。
1. A thick-walled cylindrical die body (1) made of cemented carbide, and a plurality of portions (2) at positions where the inner diameter changes,
Dividing into (3) and molding, mating surfaces (4), (5)
A groove or groove (6) or (7) having a narrow width is radially formed on one or both sides by a wheel or a blade, and then the portions (2) and (3) are closely adhered to each other to be joined to each other to form the groove (6). , (7) are air vent holes (8).
JP2153524A 1990-06-12 1990-06-12 Manufacturing method of cemented carbide die Expired - Fee Related JP2510764B2 (en)

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 JPH0445206A (en) 1992-02-14
JP2510764B2 true 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)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
JPH0445206A (en) 1992-02-14

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