JPS6182937A - Manufacture of hollow stock - Google Patents

Manufacture of hollow stock

Info

Publication number
JPS6182937A
JPS6182937A JP20464384A JP20464384A JPS6182937A JP S6182937 A JPS6182937 A JP S6182937A JP 20464384 A JP20464384 A JP 20464384A JP 20464384 A JP20464384 A JP 20464384A JP S6182937 A JPS6182937 A JP S6182937A
Authority
JP
Japan
Prior art keywords
punch
inner diameter
ironing
hole
die
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.)
Pending
Application number
JP20464384A
Other languages
Japanese (ja)
Inventor
Susumu Takahashi
進 高橋
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP20464384A priority Critical patent/JPS6182937A/en
Publication of JPS6182937A publication Critical patent/JPS6182937A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)

Abstract

PURPOSE:To eliminate a finishing process by finishing a punched hole into that of accurate diameter and smooth surface, and to enhance remarkably the productivity, by providing an ironing part for ironing the inner surface of a punched hole, having an intermediate diameter between those of a die hole and a piercing part, to the upper part of the piercing part of a punch used for manufacturing a hollow stock. CONSTITUTION:An ironing part 17 for ironing the inner surface of a punched hole, having an intermediate diameter between the hole diam. of a die 13 and the diam. of a piercing part, is provided to the upper part of the piercing part 16 of a punch 15 through upper and lower taper parts. The solid piece 18 of a stock 14 is punched out by the piercing part 16, and a punched inner diametral surface 19 is successively ironed by the ironing part 17, to improve the accuracy of hole diam. as well as the roughness of hole surface. Accordingly, a conventional finishing process is eliminated, and the productivity is remarkably improved.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は、歯車成形用の素材等として利用される中空
素材の製造に使用するのに適した中空素材の製造方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a hollow material suitable for use in manufacturing a hollow material used as a material for gear molding, etc.

（従来技術） 従来の中空素材の製造方法としては１例えば第５図に示
すようなものがある。すなわち１図において１．１はコ
ンテナ、２はコンテナ１内に設置したノックアウトパン
チ、３はノックアウトパンチ２上に設けたダイ、４はコ
ンテナ１内に装入してダイ３上に置いた中実素材、５は
ピアス部６を有するパンチである。そして、この場合、
ダイ３の内径はＤ３であり、パンチ５のピアス部６の外
径はＤＩであって、パンチ５のピアス部６とダイ３との
間には（Ｄ３−Ｄ　１）／２のクリアランスが設けであ
る。(Prior Art) As a conventional method for manufacturing a hollow material, there is one as shown in FIG. 5, for example. That is, in Figure 1, 1.1 is a container, 2 is a knockout punch installed in the container 1, 3 is a die provided on the knockout punch 2, and 4 is a solid inserted into the container 1 and placed on the die 3. The material 5 is a punch having a piercing portion 6. And in this case,
The inner diameter of the die 3 is D3, the outer diameter of the pierced part 6 of the punch 5 is DI, and a clearance of (D3-D 1)/2 is provided between the pierced part 6 of the punch 5 and the die 3. It is.

そこで、中実素材４を打抜くに際しては、コンナナ１内
に第７図（ａ）に示す中実−＋９材４を装入したのち、
パンチ５を降下させて中実素材４を加圧し、第６図に示
すように滑らかな表面である剪断部Ｌ１と粗い表面であ
る破断部Ｌ２とを有する打抜き穴７を加工して第７図（
ｂ）に示すような中空素材８を得る。この場合、打抜き
穴７の剪断部Ｌｌの内径り、′はピアス部６の外径Ｄ１
にほぼ笠しく、破断部Ｌ２の下端の内径Ｄ３′はダイ３
の内径Ｄ３にほぼ等しくなっている。そして、その後、
中空素材８の打抜き穴７の内面を旋盤等で仕上げて中空
孔２を有する中空素材１０を得るようにしている。Therefore, when punching out the solid material 4, after charging the solid -+9 material 4 shown in FIG. 7(a) into the container 1,
The punch 5 is lowered to pressurize the solid material 4, and as shown in FIG. 6, a punched hole 7 having a sheared part L1 with a smooth surface and a broken part L2 with a rough surface is formed, as shown in FIG. (
A hollow material 8 as shown in b) is obtained. In this case, the inner diameter of the sheared part Ll of the punched hole 7 is the outer diameter D1 of the pierced part 6.
The inner diameter D3' of the lower end of the broken part L2 is approximately
It is approximately equal to the inner diameter D3 of. And after that,
The inner surface of the punched hole 7 of the hollow material 8 is finished using a lathe or the like to obtain the hollow material 10 having the hollow hole 2.

しかしながら、このような従来の中空素材の製造方法に
あっては、パンチ５の先端ピアス部６の外径Ｄ１とダイ
３の内径Ｄ３との間に前述のようにクリアランス（Ｄ３
　　Ｄｌ）／２が存在しているために、パンチ５を降下
させて中実素材４を加圧して打抜き加工した後の中空素
材８には、表面が滑らかである剪断部Ｌ１のほかに、表
面が粗くかつ円錐（上端の内径がり、’、下端の内径が
Ｄ３′）形状となっている破断部Ｌ２が発生することと
なり、打抜き加工後に打抜き穴７の内面を旋盤等で仕上
げて中空孔２を形成させる必要があるという問題点があ
った。However, in such a conventional method for manufacturing a hollow material, there is a clearance (D3
Dl)/2 exists, the hollow material 8 after the punch 5 is lowered and the solid material 4 is pressurized and punched has a sheared portion L1 with a smooth surface, as well as a surface This results in a fractured part L2 that is rough and has a conical shape (inner diameter of the upper end is rounded, ', and inner diameter of the lower end is D3'). There was a problem in that it was necessary to form a

（発明の目的） この発明は、このような従来の問題点に着目してなされ
たもので、中実素材を打抜いて中空素材をｒ！Ａ造した
後に、従来のような旋盤等による打抜き大面の仕上げ加
工を必要とせず、精度の高い中空穴を有する中空素材を
得ることができるようにした製造方法を提供することを
目的としている。(Object of the Invention) This invention was made by focusing on such conventional problems, and it is possible to punch out a solid material and make a hollow material. The purpose of the present invention is to provide a manufacturing method that makes it possible to obtain a hollow material having a highly accurate hollow hole without requiring finishing processing of a large punched surface using a conventional lathe etc. after A-building. .

（発明の構成） この発明は、パンチ先端のピアス部とダイとの間で中実
素材を打抜いて中空素材を製造する方法において、前記
パンチのピアス部上方に、当該ピアス部の外径（Ｄ、）
よりも大でかつ前記ダイの内径（Ｄ３）よりも小さい外
径（Ｄ２）の打抜き穴内径しごき部を設けたパンチを用
いるようにしたことを特゛徴としている。(Structure of the Invention) The present invention provides a method for manufacturing a hollow material by punching a solid material between a pierced portion at the tip of a punch and a die, in which an outer diameter ( D.)
The present invention is characterized in that a punch is used which is provided with a punched hole inner diameter portion having an outer diameter (D2) larger than the inner diameter (D3) of the die and smaller than the inner diameter (D3) of the die.

（実施例〕 以下、この発明の実施例を図面に基づいて説明する。(Example〕 Embodiments of the present invention will be described below based on the drawings.

第１図および第２図は、この発明の一実施例を示す図で
ある０図において、１１はコンテナ、１２はコンテナ１
１内に設置されて加工後の中空素材を取り出すためのノ
ックアウトバンチ、１３はノックアウトパンチ１２上に
設けたダイ、１４はコンテナ１１内に装入してダイ１３
．）：に置いた中実素材、１５は下端にピアス部１６を
有すると共に当該ピアス部１６の上方に打抜き穴内径し
ごき部１７を有するパンチである。1 and 2 are diagrams showing one embodiment of the present invention. In FIG. 0, 11 is a container, and 12 is a container 1.
A knockout bunch is installed in the container 11 to take out the hollow material after processing, 13 is a die provided on the knockout punch 12, and 14 is inserted into the container 11 and the die 13 is installed.
．． ): A solid material 15 is a punch having a pierced portion 16 at the lower end and a punched hole inner diameter portion 17 above the pierced portion 16.

そして、この場合、第２図に示すように、ダイ１３の内
径はＤ３であり、パンチ１５のピアス部１６の外径はり
、でかつ厚ざはδであり、打抜き穴内径しごき部１７の
外径はＤ２であり、打抜き穴内径しごき部１７のラント
部１７ａの長さはＬｊであり、打抜き穴内径しごき部１
７のピアス部−［１＋１１のテーパ部１７ｂのテーパ角
度はθ１であり、ピアス部側とは反対のテーパｉ’１ｌ
ｌ１７ｃのテーパ角度はθ２である。In this case, as shown in FIG. 2, the inner diameter of the die 13 is D3, the outer diameter and thickness of the pierced portion 16 of the punch 15 is δ, and the outer diameter of the punched hole inner diameter is δ. The diameter is D2, the length of the runt part 17a of the punched hole inner diameter ironing part 17 is Lj, and the length of the runt part 17a of the punched hole inner diameter ironing part 1
The taper angle of the taper part 17b of pierced part 7 - [1+11 is θ1, and the taper i'1l is opposite to the pierced part side.
The taper angle of l17c is θ2.

また、コンテナ１１と、中実素材１４と、ダイ１３と、
ノックアウトパンチ１２とのそれぞれにおける中心軸を
一致させると共に、この中心軸と、パンチ１５の中心軸
とが一致するようにして、ピアス部１６と打抜き穴内径
しごき部１７とを有するパンチ１５を通常のプレス装置
に取り付け１例えば図示しないプレスのスライド機構に
より当該バンチ１５を前進可能な構成とする。Moreover, the container 11, the solid material 14, the die 13,
The punch 15 having the pierced part 16 and the punched hole inner diameter ironing part 17 is made to match the center axis of each punch 15 with the knockout punch 12 and the center axis of the punch 15. The bunch 15 is attached to a press device 1 so that it can be moved forward, for example, by a slide mechanism of the press (not shown).

そこで、具体的な一例としては、前記パンチ１５および
ダイ１３の寸法を以下のように定めることかできる。す
なわち、ダイ１５の内径Ｄ３とパンチ１５の打抜き穴内
径しごきＢＢ１７の外径Ｄ２との差（Ｄ３　　Ｄ２）を
０．２〜０．３ｒｎｍとし、パンチ１５のピアス部１６
の外径Ｄ１と当該パンチ１５の打抜き穴内径しごき部１
７の外径Ｄ２との差（Ｄ２　　Ｄ１）を０．５〜０，８
１とし、前記打抜き穴内径しごき部１７のランド部１７
ａの長さＬ３を３ｍｍ以下とし、当該内径しごき部１７
のピアス部１６側のテーパ部１７ｂの角度θ１を０．＝
２０〜４０°とし、ピアス部１６側とは反対側のテーパ
部１７Ｃの角度０２を０２＝５〜５０°とする。Therefore, as a specific example, the dimensions of the punch 15 and die 13 can be determined as follows. That is, the difference (D3 D2) between the inner diameter D3 of the die 15 and the outer diameter D2 of the punched hole inner diameter BB17 is set to 0.2 to 0.3 nm, and the pierced portion 16 of the punch 15 is
The outer diameter D1 of the punch 15 and the inner diameter of the punched hole 1
The difference between the outer diameter D2 of 7 (D2 D1) is 0.5 to 0.8
1, and the land portion 17 of the punched hole inner diameter ironing portion 17
The length L3 of a is 3 mm or less, and the inner diameter ironing part 17
The angle θ1 of the tapered portion 17b on the pierced portion 16 side is set to 0. =
The angle 02 of the tapered portion 17C on the side opposite to the pierced portion 16 is set to 02=5 to 50°.

次に、上記装置の動きについて第３図および第４図を含
めて説明する。Next, the operation of the above device will be explained with reference to FIGS. 3 and 4.

まず、第１図に示すように、コンテナ１１内に中実素材
１４を装入したのち、図示しないプレスのスライド機構
によってパンチ１５を降下させ、パンチ１５の先端に設
けたピアス部１６によって第３図に示すように打抜き屑
１８を落下させて、中実素材１４の中央部分に貫通した
打抜き穴１２をあける。ここで、前記パンチ１５の下降
によって形成された打抜き穴１りは、長さＬｌの間は剪
断加工によるためその内面は滑らかであるが、その後パ
ンチ１５の先端ピアス部１６が中実素材１４から抜は出
るまでの長さＬ２の間は破断によるためその内面は荒れ
たものとなっている。そして、長さＬｌの間および長さ
Ｌ２の部分の上端における直径はパンチ１５のピアス部
１６の外径Ｄ１とほぼ等しく、長さＬ２の部分の下端に
おける直径はダイス１３の内径Ｄ３とほぼ等しくなって
おり、ＤＩくＤ３の関係にあるので破断部（Ｌ２）は円
錐形状となっている。First, as shown in FIG. 1, after charging the solid material 14 into the container 11, the punch 15 is lowered by the slide mechanism of the press (not shown), and the pierced part 16 provided at the tip of the punch 15 is inserted into the third As shown in the figure, punching waste 18 is dropped to form a punching hole 12 penetrating the center of the solid material 14. Here, the inner surface of the punched hole formed by the lowering of the punch 15 is smooth during the length Ll due to the shearing process, but after that, the tip pierced portion 16 of the punch 15 is cut from the solid material 14. The inner surface is rough during the length L2 until it comes out due to breakage. The diameter at the upper end of the length Ll and the length L2 portion is approximately equal to the outer diameter D1 of the pierced portion 16 of the punch 15, and the diameter at the lower end of the length L2 portion is approximately equal to the inner diameter D3 of the die 13. Since there is a relationship of DI x D3, the fracture portion (L2) has a conical shape.

続いて、パンチ１５をさらに下降させることにより、第
３図に示すように、パンチ１５に設けた打抜き穴内径し
ごき部１７が、すでにピアス部１６によって成形された
打抜き穴１りの内面をしごき加工することとなるため、
ピアス部１６によってすでに滑らかな剪断面となってい
る長さＬｌの部分の内径が第３図および第４図に示すよ
うにさらに精度良く仕上げられると共に、長さＬｌの部
分におけるしごき加工によって下方に押し寄せられた素
材の一部が破断部（長さＬ２の部分）にまで流れ、図中
Ａに示すように若干のダレは残るもののパンチ１５の打
抜き穴内径しごき部１７のランド部１７ａによって当該
破断部のテーパ状内面を滑らかなストレートの円筒状に
仕上げ、１工程で高精度な中空穴２０を有する中空素材
２１を製造することができる。この後、ダレＡについて
は、旋盤等による端面加工により容易に仕上げることが
できる。Subsequently, by further lowering the punch 15, as shown in FIG. Because it will be necessary to
As shown in FIGS. 3 and 4, the inner diameter of the portion of length Ll, which has already become a smooth sheared surface due to the pierced portion 16, is finished with more precision, and the ironing process of the portion of length Ll lowers the inner diameter downward. A part of the pressed material flows to the broken part (length L2 part), and although some sagging remains as shown in A in the figure, the broken part is broken by the land part 17a of the punched hole inner diameter ironing part 17 of the punch 15. By finishing the tapered inner surface of the part into a smooth straight cylindrical shape, a hollow material 21 having a highly accurate hollow hole 20 can be manufactured in one step. After this, the sag A can be easily finished by end face processing using a lathe or the like.

なお、打抜き穴内径しごき部１７のランド部１７ａの長
ざＬ３かあまり大きいと、成形荷重め増加およびパンチ
１５と中実素材１４との間での焼付きの原因となるので
、ランド部１７ａの長さは３ｏｍ以下とするのがより望
ましく、内径しごき部１７のピアス部１６側のテーパ角
度θ１があまり大きいと、内径しごき部１７でしごき加
工をするときにピアス部１６で成形した内面をそ（削）
いでしまい、表面を粗くするので好ましくなく、反対に
あまり小さいとパンチ１５と中実素材１４との間で焼付
きを生じるので好ましくなく、このような点を考慮して
上記角度θ１は２０〜４０゜とすることがより望ましい
。一方、内径しごき部１７のピアス部１６とは反対側の
角度θ２については、第４図に示す成形終了後にパンチ
１５を後退させる時に、成形した中空穴２０の内面を疵
付けないようにするためにあまり大きくないことが好ま
しく、反対に角度が小さいとパンチ１５と素材２１との
接触面積が大となり、パンチ１５と中ｒｆＴ：ｉｈ−Ｈ
つ１し凹づＪ＾卦臀小百田しｔ、−ス小づ　−緒らの点
を考慮して上記角度は５〜５０°とすることがより望ま
しい。Note that if the length L3 of the land portion 17a of the punched hole inner diameter ironing portion 17 is too large, it will increase the forming load and cause seizure between the punch 15 and the solid material 14. It is more desirable that the length is 3 ohm or less, and if the taper angle θ1 of the inner diameter ironing part 17 on the pierced part 16 side is too large, the inner surface formed by the pierced part 16 will be damaged when ironing is performed with the inner diameter ironing part 17. (cut)
On the other hand, if the diameter is too small, seizure may occur between the punch 15 and the solid material 14, which is undesirable. Considering these points, the angle θ1 is set to 20 to 40. It is more desirable to set it to ゜. On the other hand, the angle θ2 of the inner diameter ironing portion 17 on the side opposite to the pierced portion 16 is set in order to prevent the inner surface of the formed hollow hole 20 from being scratched when the punch 15 is retreated after the forming shown in FIG. It is preferable that the angle is not too large; conversely, if the angle is small, the contact area between the punch 15 and the material 21 becomes large, and the angle between the punch 15 and the medium rfT:ih-H
It is more desirable that the above angle be 5 to 50 degrees, taking into consideration the following points:

他方、ダイ１３の内ｇＤ３とパンチ１５の内径しごき部
１７の外径Ｄ２との差ＣＤ３　　Ｄ２）つまりクリアラ
ンスについては、これをあまり小さくすると成形中にダ
イ１３と内径しごき部１７とが強く接触して破損の原因
となる恐れがあり、反対にあまり大きくすると破断部（
Ｌ２の部分）が大きくなって内径しごき部１７でしごい
たあとも残ってしまう恐れがあるので、これらの点を考
慮して上記クリアランスは０．２〜０　、３ｍｍｃ７）
範囲とすることがより望ましい。さらに、パンチ１５の
ピアス部１６の外径Ｄ！と当該バンチ１５の内径しごき
部１７の外径Ｄ２との差（Ｄ２−ＤＩ　）については、
これがあまり大きいとしごき加工量が多くなり、成形荷
重を増加させることとなるので好ましくなく、反対にあ
まり小さいと前述したしごき加工の効果がなくなり、破
断部（Ｌ２の部分）を平滑な中空状に仕上げることがで
きなくなるので、これらの点を考慮して上記両外径の差
（Ｄ２　　Ｄ１）は０　、５〜０　、８ｍｍとすること
がより望ましい。On the other hand, regarding the difference CD3 (D2) between the inner diameter gD3 of the die 13 and the outer diameter D2 of the inner diameter ironing part 17 of the punch 15, if this is made too small, the die 13 and the inner diameter ironing part 17 will come into strong contact during molding. On the other hand, if the size is too large, the broken part (
There is a risk that the part (L2 part) becomes large and remains even after being squeezed with the inner diameter squeezing part 17, so taking these points into consideration, the above clearance is set to 0.2 to 0.3mmc7).
It is more desirable to have a range. Furthermore, the outer diameter D of the pierced portion 16 of the punch 15! Regarding the difference (D2-DI) between the outer diameter D2 of the inner diameter ironing portion 17 of the bunch 15,
If this is too large, the amount of ironing will increase and the forming load will increase, which is undesirable.On the other hand, if it is too small, the effect of the ironing process mentioned above will be lost, and the broken part (L2 part) will become smooth and hollow. Considering these points, it is more desirable that the difference between the two outer diameters (D2 D1) be 0.5 to 0.8 mm.

（発明の効果） 以上説明してきたように、この発明によれば、パンチ先
端のピアス部とグイとの間で中実素材を打抜いて中空素
材を製造する方法において、前記パンチのピアス部上方
に、当該ピアス部の外径（Ｄｌ）よりも大でかつ前記グ
イの内径（Ｄ３）よりも小さい外径（Ｄ２）の打抜き穴
内径しごき部を設けたパンチを用いるようにしたから、
中実素材を打抜いて中空素材を製造した後に、従来のよ
うな旋盤等による打抜き大面の仕上加工を必要とせず、
精度が高く打抜き肌の良好な中空穴を有する中空素材を
得ることが可能であり、しかもこのような中空素材を１
工程で製造することができるため生産性にも著しく優れ
たものであるという非常に優れた効果が得られる。(Effects of the Invention) As described above, according to the present invention, in the method of manufacturing a hollow material by punching a solid material between the pierced part of the punch tip and the goo, the upper part of the pierced part of the punch is In addition, since a punch is used which is provided with an inner diameter ironing part of the punched hole having an outer diameter (D2) larger than the outer diameter (Dl) of the piercing part and smaller than the inner diameter (D3) of the goo,
After punching out a solid material to produce a hollow material, there is no need to finish the large surface of the punch using a lathe, etc., as in the past.
It is possible to obtain a hollow material having hollow holes with high precision and good punching texture, and furthermore, such a hollow material can be
Since it can be manufactured in a single process, it is possible to obtain extremely excellent effects in terms of productivity.

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

第１図はこの発明の一実施例による中空素材製造装置の
グイおよびパンチの構造を示す断面説明図、第２図は第
１図の装置におけるグイとパンチの寸法関係を示す説明
図、第３図および第４図は第１図の装置におけるパンチ
の各々降下途中の状態および降下後の状態を示す断面説
明図、第５図は従来の中空素材製造装置のグイおよびパ
シチの構造を示す断面説明図、第６図は第５図に示す装
置においてパンチを降下させた後の状態を示す断面説明
図、第７図（ａ）〜（ｃ）は第５図に示す装置によって
中実素材を中空素材に加工する際の形状変化を示す断面
説明図である。 １３・・・グイ、 １４・・・中実素材、 １５・・・パンチ、 １６・・・ピアス部、 １７・・・打抜き穴内径しごき部、 １２・・・打抜き穴、 ２０・・・中空穴、 ２１・・・中空素材。 特許出願人　　日産自動車株式会社 代理人弁理士　小　　塩　　　豊 第３回FIG. 1 is an explanatory cross-sectional view showing the structure of the goo and punch of a hollow material manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the dimensional relationship between the goo and the punch in the apparatus of FIG. 1, and FIG. 4 and 4 are cross-sectional explanatory diagrams showing the state of the punch in the device shown in FIG. 1 during its descent and after its descent, respectively. FIG. 5 is a cross-sectional explanatory diagram showing the structure of the goo and punch of the conventional hollow material manufacturing device 6 is a cross-sectional explanatory view showing the state after the punch is lowered in the device shown in FIG. 5, and FIGS. FIG. 3 is an explanatory cross-sectional diagram showing a change in shape during processing into a raw material. 13... Gui, 14... Solid material, 15... Punch, 16... Piercing part, 17... Punching hole inner diameter ironing part, 12... Punching hole, 20... Hollow hole , 21...Hollow material. Patent Applicant: Nissan Motor Co., Ltd. Representative Patent Attorney Yutaka Oshio 3rd session

Claims (2)

【特許請求の範囲】[Claims] （１）パンチ先端のピアス部とダイとの間で中実素材を
打抜いて中空素材を製造する方法において、前記パンチ
のピアス部上方に、当該ピアス部の外径（Ｄ＿１）より
も大でかつ前記ダイの内径（Ｄ＿３）よりも小さい外径
（Ｄ＿２）の打抜き穴内径しごき部を設けたパンチを用
いることを特徴とする中空素材の製造方法。(1) In a method of manufacturing a hollow material by punching a solid material between a pierced part at the tip of a punch and a die, a hole larger than the outer diameter (D_1) of the pierced part is placed above the pierced part of the punch. A method for manufacturing a hollow material, characterized in that a punch is provided with a punched hole inner diameter ironing portion having an outer diameter (D_2) smaller than the inner diameter (D_3) of the die. （２）ダイの内径（Ｄ＿３）とパンチの内径しごき部の
外径（Ｄ＿２）との差（Ｄ＿３−Ｄ＿２）を０．２〜０
．３ｍｍ、パンチのピアス部の外径（Ｄ＿１）と当該パ
ンチの内径しごき部の外径（Ｄ＿２）との差（Ｄ＿２−
Ｄ＿１）を０．５〜０．８ｍｍ、内径しごき部のランド
部の長さ（Ｌ＿３）を３ｍｍ以下、内径しごき部のピア
ス部側の角度（θ＿１）をθ＿１＝２０〜４０°、内径
しごき部の前記ピアス部とは反対側の角度（θ＿２）を
θ＿２＝５〜５０°とした特許請求の範囲第（１）項記
載の中空素材の製造方法。(2) The difference (D_3-D_2) between the inner diameter of the die (D_3) and the outer diameter of the inner diameter of the punch (D_2) is 0.2 to 0.
．． 3mm, the difference (D_2-
D_1) is 0.5 to 0.8 mm, the length (L_3) of the land part of the inner diameter ironing part is 3 mm or less, the angle (θ_1) on the piercing part side of the inner diameter ironing part is θ_1 = 20 to 40°, the inner diameter ironing part The method for manufacturing a hollow material according to claim 1, wherein the angle (θ_2) on the side opposite to the pierced portion is set to θ_2 = 5 to 50°.
JP20464384A 1984-09-28 1984-09-28 Manufacture of hollow stock Pending JPS6182937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20464384A JPS6182937A (en) 1984-09-28 1984-09-28 Manufacture of hollow stock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20464384A JPS6182937A (en) 1984-09-28 1984-09-28 Manufacture of hollow stock

Publications (1)

Publication Number Publication Date
JPS6182937A true JPS6182937A (en) 1986-04-26

Family

ID=16493871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20464384A Pending JPS6182937A (en) 1984-09-28 1984-09-28 Manufacture of hollow stock

Country Status (1)

Country Link
JP (1) JPS6182937A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0237923A (en) * 1988-07-29 1990-02-07 Fuji Heavy Ind Ltd Punch for piercing
JP2007333079A (en) * 2006-06-15 2007-12-27 Ntn Corp Thrust roller bearing
JP2009178729A (en) * 2008-01-30 2009-08-13 Nippon Steel Corp Punching method by shoulder type punch and shoulder type punch
JP2009233828A (en) * 2008-03-28 2009-10-15 Tdk Corp Punching pin, punching die, and punching device
JP2009248162A (en) * 2008-04-09 2009-10-29 Nippon Steel Corp Punching method and punching device
JP2010082683A (en) * 2008-10-02 2010-04-15 Aisin Seiki Co Ltd Working apparatus
US7896558B2 (en) 2006-06-06 2011-03-01 Ntn Corporation Thrust roller bearing
JP2011218373A (en) * 2010-04-05 2011-11-04 Nippon Steel Corp Coining method and apparatus for the same
JP2012101254A (en) * 2010-11-10 2012-05-31 Sanei Kogyo:Kk Method for manufacturing blanked body
CN104492921A (en) * 2014-09-28 2015-04-08 上海奥林汽车安全系统有限公司 Punch for shaping pin holes
JP2015098049A (en) * 2013-11-20 2015-05-28 武蔵精密工業株式会社 Hole formation method
EP2987566A1 (en) * 2014-08-20 2016-02-24 Feintool International Holding AG Apparatus and method for calibrating cut surfaces of punched or fineblanked parts having burr
EP3639944A1 (en) * 2018-10-19 2020-04-22 Shinko Electric Industries Co., Ltd. Method of manufacturing eyelet

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0237923A (en) * 1988-07-29 1990-02-07 Fuji Heavy Ind Ltd Punch for piercing
US7896558B2 (en) 2006-06-06 2011-03-01 Ntn Corporation Thrust roller bearing
JP2007333079A (en) * 2006-06-15 2007-12-27 Ntn Corp Thrust roller bearing
JP4578441B2 (en) * 2006-06-15 2010-11-10 Ｎｔｎ株式会社 Thrust roller bearing
JP2009178729A (en) * 2008-01-30 2009-08-13 Nippon Steel Corp Punching method by shoulder type punch and shoulder type punch
JP2009233828A (en) * 2008-03-28 2009-10-15 Tdk Corp Punching pin, punching die, and punching device
JP2009248162A (en) * 2008-04-09 2009-10-29 Nippon Steel Corp Punching method and punching device
JP2010082683A (en) * 2008-10-02 2010-04-15 Aisin Seiki Co Ltd Working apparatus
JP2011218373A (en) * 2010-04-05 2011-11-04 Nippon Steel Corp Coining method and apparatus for the same
JP2012101254A (en) * 2010-11-10 2012-05-31 Sanei Kogyo:Kk Method for manufacturing blanked body
JP2015098049A (en) * 2013-11-20 2015-05-28 武蔵精密工業株式会社 Hole formation method
EP2987566A1 (en) * 2014-08-20 2016-02-24 Feintool International Holding AG Apparatus and method for calibrating cut surfaces of punched or fineblanked parts having burr
CN105382068A (en) * 2014-08-20 2016-03-09 法因图尔国际控股股份公司 Device and method for shaping sheared edges on stamped or fine-blanked parts having a burr
CN105382068B (en) * 2014-08-20 2019-11-08 法因图尔国际控股股份公司 The device and method of the cut surface with burr on finishing stamping parts or fine part
CN104492921A (en) * 2014-09-28 2015-04-08 上海奥林汽车安全系统有限公司 Punch for shaping pin holes
EP3639944A1 (en) * 2018-10-19 2020-04-22 Shinko Electric Industries Co., Ltd. Method of manufacturing eyelet
JP2020062672A (en) * 2018-10-19 2020-04-23 新光電気工業株式会社 Production method of eyelet

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