JPH04197534A - Manufacture of die - Google Patents
Manufacture of dieInfo
- Publication number
- JPH04197534A JPH04197534A JP32522290A JP32522290A JPH04197534A JP H04197534 A JPH04197534 A JP H04197534A JP 32522290 A JP32522290 A JP 32522290A JP 32522290 A JP32522290 A JP 32522290A JP H04197534 A JPH04197534 A JP H04197534A
- Authority
- JP
- Japan
- Prior art keywords
- die
- slit
- hole
- punching
- outline
- 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 abstract description 18
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 abstract description 19
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、例えば打抜き金型のようにプレス加工におい
て使用される金型の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a mold used in press working, such as a punching mold.
（従来の技術）
半導体リードフレームなどの精密な電子部品を大量生産
するために、コイル状素材等を利用して、打抜き加工の
ようなプレス加工法が広く利用されている。(Prior Art) In order to mass produce precision electronic components such as semiconductor lead frames, press working methods such as punching are widely used using coiled materials.
このような電子部品をプレス加工する際においては、部
品の形状の特異性により、スリット形の穴あけを連続し
て打抜き加工する必要がしばしば生しる。そこで、例え
ば前記打抜き加工するための金型においては、その下型
としてダイを製作することが要請される。このダイを製
造する方法として、例えば精密に研削した複数個の小部
品を組上げていく方法や、放電ワイヤカット加工によっ
て連続的に一体型に切断して製作する方法があり、実際
に工業界においてそれらの製造方法によって金型が製造
されている。When pressing such electronic components, it is often necessary to punch out slit-shaped holes in succession due to the unique shape of the component. Therefore, for example, in the die for punching, it is required to manufacture a die as the lower die. There are two ways to manufacture this die, for example, a method of assembling multiple small parts that have been precisely ground, and a method of continuously cutting them into a single piece using electrical discharge wire cutting. Molds are manufactured using these manufacturing methods.
前記製造方法にはそれぞれ一長一短があるが、コスト的
には放電ワイヤカット加工によって連続的に一体型に切
断して製作する方法が圧倒的に安い。このため、最近の
放電ワイヤカット機の性能向上と相俟って、放電ワイヤ
カット加工によって金型を連続的に一体型に切断して製
造する方法が採用されてきている。Each of the above-mentioned manufacturing methods has advantages and disadvantages, but in terms of cost, the method of manufacturing by continuously cutting into a single piece by electrical discharge wire cutting is by far the cheapest. For this reason, together with the recent performance improvement of electric discharge wire cutting machines, a manufacturing method in which the mold is continuously cut into one piece by electric discharge wire cutting has been adopted.
（発明か解決しようとする課題） ′
−一体型ダイを製作すると、打抜き加工の際に発生する
側圧力とダイ穴内に詰まる抜きかすのために、スリット
形のダイ穴内に穴形状を押し広げようとする圧力が発生
する。このため、打抜き加工の都度、ダイ穴角部に繰り
返し大きな引張り応力が発生し、打抜きを継続すると、
ダイ穴角部に亀裂が生じ疲労破壊するという問題点があ
った。(Problem to be solved by the invention) ′ - When manufacturing a one-piece die, it is necessary to expand the hole shape in the slit-shaped die hole due to the side pressure generated during punching and the punching debris that gets stuck in the die hole. A pressure is generated. For this reason, large tensile stress is repeatedly generated at the corners of the die hole each time punching is performed, and if punching continues,
There was a problem in that cracks formed at the corners of the die hole, resulting in fatigue failure.
本発明の目的は、寿命の長くかつコストの安いプレス打
抜き加工用金型の製造方法を提供することにある。An object of the present invention is to provide a method for manufacturing a press punching die that has a long life and is inexpensive.
［発明の構成］
（問題点を解決するための手段及び作用）本発明は、プ
レス加工において使用される金型の製造方法に関するも
ので、複数列のスリット形の穴あけをプレス加工するた
めの金型の製造方法にして、金型の下型を、外周輪郭に
最も近接したスリット形の穴の輪郭を分割した形状に、
放電ワイヤカット加工によって連続的に切断して製造す
ることを特徴とする金型の製造方法を提供するも６ので
ある。[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention relates to a method for manufacturing a mold used in press working, and relates to a method for manufacturing a mold used in press working, and relates to a mold for press working to form multiple rows of slit-shaped holes. In the mold manufacturing method, the lower part of the mold is divided into a shape that divides the outline of the slit-shaped hole closest to the outer peripheral outline,
The present invention provides a method for manufacturing a mold, characterized in that the mold is manufactured by continuous cutting by electrical discharge wire cutting.
（実施例）
以下、本発明のプレス加工用金型の一実施例を図面を参
照して説明する。(Example) Hereinafter, an example of a press working mold of the present invention will be described with reference to the drawings.
プレス金型の下型（ダイ）１は、複数列のスリット形の
穴２をプレス加工によって穴あけするようになっている
。ここで下型（ダイ）１は、外周輪郭３と複数列のスリ
ット形の穴２とを、放電ワイヤカット加工によって連続
的に切断して製造される。ここで、下型（ダイ）１を放
電ワイヤカット加工によって切断する際に、分割線４に
沿って前記外周輪郭３に最も近接したスリット形の穴２
の輪郭を分割した形状に切断し、型部品５と６を製作す
る。下型（ダイ）１を完成させるには、前記型部品５と
６をただ単に組み合わせれば良い。A lower mold (die) 1 of the press mold is configured to form a plurality of rows of slit-shaped holes 2 by press working. Here, the lower mold (die) 1 is manufactured by continuously cutting the outer peripheral contour 3 and the plurality of rows of slit-shaped holes 2 by electrical discharge wire cutting. Here, when cutting the lower mold (die) 1 by electrical discharge wire cutting, a slit-shaped hole 2 closest to the outer circumferential contour 3 along the parting line 4 is cut.
The contour is cut into divided shapes to produce mold parts 5 and 6. To complete the lower mold (die) 1, the mold parts 5 and 6 may simply be assembled.
従来例のように一体型にダイを製作すると、打抜き加工
の際に発生する側圧力とダイ穴内に詰まる抜きかすのた
めに、スリット形のダイ穴内に穴形状を押し広げようと
する圧力が発生する。このため、打抜き加工の都度、ダ
イ穴角部に繰り返し大きな引張り応力が発生し、打抜き
を継続すると、大角部に亀裂が生じ疲労破壊する。When a die is made in one piece as in the conventional example, pressure is generated in the slit-shaped die hole to expand the hole shape due to the side pressure generated during punching and the punching debris that gets stuck in the die hole. do. For this reason, large tensile stress is repeatedly generated at the corners of the die hole each time punching is performed, and if punching continues, cracks occur in the large corners and fatigue failure occurs.
しかしながら、図面に示した分割型の下型（ダイ）１で
は打抜き加工の際に発生する側圧力によって、前記型部
品５と６が側方に押し広げられるだけで、大きな引張り
応力は発生しな−い。However, in the split-type lower die (die) 1 shown in the drawing, the die parts 5 and 6 are only pushed apart laterally by the side pressure generated during punching, and no large tensile stress is generated. - Yes.
例えば、下型（ダイ）の概略寸法とダイス穴内に穴形状
を押し広げようとする側圧力が次の場合（板厚Ｑ、４ｍ
ｍの銅合金リードフレームを打抜く場合）、従来の（ダ
イ）１では、ダイ穴角部に約３５ ｋ ｇ Ｌ／ｍｍ’
！の最大引張り応力か発生する。これは下型（ダイ）の
材質が超硬合金の場合、十分疲労破壊するレベルの応力
である。For example, if the approximate dimensions of the lower mold (die) and the side pressure that tries to expand the hole shape in the die hole are as follows (plate thickness Q, 4 m
When punching a copper alloy lead frame of m), the conventional (die) 1 has a diameter of approximately 35 kg L/mm' at the corner of the die hole.
! The maximum tensile stress will occur. If the material of the lower mold (die) is cemented carbide, this stress is at a level sufficient to cause fatigue failure.
金型の寸法 ａ ＝１３． ５ｍｍｂ＝０．８９ａ
＋ｎ＋
Ｗ ｓ ＝ ３７ 、８ｍｍ
Ｗ２＝８０ｍｍ
スリット形の大角部の丸み
半径０． ２ｍｍ
側圧力 １０ｋｇｆ／ｍｍ
金型の材質 超硬合金
しかしながら、本発明による実施例である図面に示した
下型（ダイ）１では、ダイ穴角部８に発生する最大引張
り応力は約７ ｋ ｇ ｆ ７ｍｍ２と低下し、この応
力では疲労破壊は生じない。これはスリット形の穴２の
輪郭を分割した形状に切断しているため、型部品５につ
いては穴形状を押し広げようとする側圧力か加わっても
、内側のスリット形の穴２にも等しい大きさの側圧力が
加わっているため、圧力が丁度相殺されてスリット形の
穴２が変形するだけで、応力か大きくならないためであ
る。型部品６については、外側をダイホルダーが拘束し
ているため、やはり応力か大きくならない。Mold dimensions a = 13. 5mmb=0.89a
+n+ W s = 37, 8 mm W2 = 80 mm Rounding radius of large corner of slit shape 0. 2 mm Side pressure 10 kgf/mm Mold material Cemented carbide However, in the lower mold (die) 1 shown in the drawings, which is an embodiment of the present invention, the maximum tensile stress generated at the die hole corner 8 is approximately 7 kg f decreases to 7 mm2, and fatigue failure does not occur at this stress. This is because the contour of the slit-shaped hole 2 is cut into a divided shape, so even if side pressure is applied to the mold part 5 to push the hole shape wider, it is equal to the inner slit-shaped hole 2. This is because since the side pressure of the same size is applied, the pressure is exactly canceled out and the slit-shaped hole 2 is only deformed, and the stress does not become large. As for the mold part 6, since the outside is restrained by the die holder, the stress does not become large.
スリット形の穴２の輪郭を分割した場合、プレス加工時
に型部品５と６に型開きが生じるがこれも前述した応力
解析の結果から約２μｍであることが判明している。こ
の程度の量ならば打抜きされる部品の精度には問題は生
じない。If the outline of the slit-shaped hole 2 is divided, mold parts 5 and 6 will open during press working, but this is also found to be about 2 μm from the results of the stress analysis described above. With this amount, there will be no problem with the accuracy of the punched parts.
本発明の実施例による、プレス金型の下型（ダイ）１に
よって金型を製作し、半導体リードフレームの打抜き加
工を行った所、金型を破壊することなく、数百ガロの打
抜き加工を無事実施することができた。According to the embodiment of the present invention, when a die was manufactured using the lower die (die) 1 of a press die and a semiconductor lead frame was punched, several hundreds of gallons could be punched without destroying the die. I was able to successfully implement it.
［発明の効果コ
本発明によれば、以上のようなプロセスにより、打抜き
に伴う疲労破壊のない寿命の長いプレス金型を製造する
方法を提供することができ、これによって製造コストの
低い製品を供給することかできる。[Effects of the Invention] According to the present invention, it is possible to provide a method of manufacturing a press die with a long life without fatigue failure due to punching through the process described above, and thereby a product with low manufacturing cost can be manufactured. Can you supply?
図面は本発明の一実施例を示す金型の概略図である。 １・・・・・・・・・下型 ２・・・・・・・・・スリット形式 ３・・・・・・・・・外周 ４・・・・・・・・・分割線 代理人 弁理士 則 近 憲 佑 The drawing is a schematic diagram of a mold showing an embodiment of the present invention. １・・・・・・・・・Lower mold 2・・・・・・・・・Slit format ３・・・・・・・・・Outer circumference ４・・・・・・・・・Dividing line Agent: Patent Attorney Noriyuki Chika
Claims (1)
型の下型を、外周輪郭に最も近接したスリット形の穴の
輪郭を分割した形状に、放電ワイヤカット加工によって
連続的に切断して製造することを特徴とする金型の製造
方法。Manufactured by continuously cutting the lower die of a mold for pressing multiple rows of slit-shaped holes into shapes that divide the outline of the slit-shaped holes closest to the outer circumferential outline using electrical discharge wire cutting. A mold manufacturing method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32522290A JP2716868B2 (en) | 1990-11-29 | 1990-11-29 | Mold manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32522290A JP2716868B2 (en) | 1990-11-29 | 1990-11-29 | Mold manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04197534A true JPH04197534A (en) | 1992-07-17 |
| JP2716868B2 JP2716868B2 (en) | 1998-02-18 |
Family
ID=18174391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32522290A Expired - Fee Related JP2716868B2 (en) | 1990-11-29 | 1990-11-29 | Mold manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2716868B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621034B2 (en) * | 1999-12-10 | 2003-09-16 | Ngk Insulators, Ltd. | Method of manufacturing die |
| JP2005329421A (en) * | 2004-05-19 | 2005-12-02 | Asahi-Seiki Mfg Co Ltd | Die and transfer press |
-
1990
- 1990-11-29 JP JP32522290A patent/JP2716868B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621034B2 (en) * | 1999-12-10 | 2003-09-16 | Ngk Insulators, Ltd. | Method of manufacturing die |
| JP2005329421A (en) * | 2004-05-19 | 2005-12-02 | Asahi-Seiki Mfg Co Ltd | Die and transfer press |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2716868B2 (en) | 1998-02-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |