JPS6123859B2 - - Google Patents
Info
- Publication number
- JPS6123859B2 JPS6123859B2 JP58213065A JP21306583A JPS6123859B2 JP S6123859 B2 JPS6123859 B2 JP S6123859B2 JP 58213065 A JP58213065 A JP 58213065A JP 21306583 A JP21306583 A JP 21306583A JP S6123859 B2 JPS6123859 B2 JP S6123859B2
- Authority
- JP
- Japan
- Prior art keywords
- age
- copper alloy
- bent
- alloy plate
- molded product
- 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
Links
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 27
- 238000003483 aging Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 description 7
- 238000000137 annealing Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 6
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- IUYOGGFTLHZHEG-UHFFFAOYSA-N copper titanium Chemical compound [Ti].[Cu] IUYOGGFTLHZHEG-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は電子工業用ばね材のような高精度と優
れたばね性が要求される部材として用いられる折
曲部分を有する時効硬化性銅合金製成形品の製造
法に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to an age-hardenable copper alloy material having a bent portion, which is used as a member such as a spring material for the electronic industry that requires high precision and excellent spring properties. This relates to a method for manufacturing molded products.
（従来技術）
コンピユーター用コネクターのような電子工業
用ばね材としては従来からベリリウム銅その他の
時効硬化性銅合金製成形品が用いられているが、
これらの成形品は銅合金板を所望の形状に折曲成
形した後に時効硬化処理を行う方法により製造さ
れているため、時効硬化処理の際に生ずる収縮に
より歪を生じて高い寸法精度が得られない欠点が
あつた。そこで、時効硬化させた銅合金板の折曲
しようとする部分をバーナーや鏝等により加熱軟
化させて折曲成形する方法も考えられるところで
あるが、この場合には折曲部分のばね性が失なわ
れる欠点があり、逆に、ばね性を維持するために
加熱軟化を控え目に行なうと曲率半径の小さい折
曲成形ができなくなる等種々の問題が残されてい
る。(Prior art) Molded products made of beryllium copper and other age-hardening copper alloys have been used as spring materials for electronic industries such as computer connectors.
These molded products are manufactured by folding a copper alloy plate into the desired shape and then subjecting it to age hardening treatment, so the shrinkage that occurs during the age hardening treatment causes distortion, resulting in high dimensional accuracy. It had some flaws. Therefore, a method of bending an age-hardened copper alloy plate by heating and softening the part to be bent using a burner or a trowel may be considered, but in this case, the springiness of the bent part is lost. On the other hand, if heating and softening is carried out sparingly in order to maintain springiness, various problems remain, such as the inability to perform bending with a small radius of curvature.
（発明の目的）
本発明はこのような問題点を解決して曲率半径
の小さい折曲成形が可能であり、しかも、優れた
ばね性を有する折曲部分を有する成形品を寸法精
度良く製造することができる折曲部分を有する時
効硬化性銅合金製成形品の製造法を目的として完
成されたものである。(Objective of the Invention) The present invention solves these problems and manufactures a molded product with high dimensional accuracy, which allows bending molding with a small radius of curvature and has a bent portion with excellent spring properties. This method was developed for the purpose of manufacturing age-hardenable copper alloy molded products that have bendable parts.
（発明の構成）
本発明は時効硬化させた銅合金板の折曲しよう
とする部分を焼なまして軟化させのち該軟化部分
より折曲げて所望の形状に成形し、この成形品に
時効硬化処理を施して全体を時効硬化組織とする
ことを特徴とするものである。(Structure of the Invention) The present invention involves annealing and softening the portion of an age-hardened copper alloy plate to be bent, and then bending from the softened portion to form a desired shape, and subjecting this molded product to age-hardening treatment. It is characterized by applying the following steps to form an age-hardened structure as a whole.
本発明において用いられる銅合金板はベリリウ
ム銅、チタン銅のような時効硬化性銅合金板を常
法により時効硬化させたものであり、その折曲し
ようとする部分をガスバーナー、鏝あるいは両面
に当接させた電極による通電加熱等の適宜の手段
により再結晶温度にまで加熱して焼なまし軟化さ
せる。この加熱は折曲しようとする部分のみを再
結晶させることを目的とするので、その隣接する
部分にはなるべく熱影響を及ぼすことがないよう
に行なうべきであり、隣接する部分に熱影響が及
んで過時効組織を生ずることは極力避ける必要が
ある。このためには通電加熱が最も好ましく、ま
た、焼なまし温度は銅合金板の再結晶温度よりも
高温側へ100℃以内に温度範囲とすることが好ま
しい。焼なまし温度が上記温度範囲を越えると隣
接する部分に熱影響が及び易くなる。このように
して折曲しようとする部分のみが軟化された銅合
金板は、該軟化部分より折曲げて所望の形状に成
形される。なお、軟化部分はその幅が狭くて他の
部分との硬度差が大きいほど曲率半径の小さい折
曲げが行い易くなり180゜の密着曲げが可能とな
る。次に、該軟化部分を含む全体に再度時効硬化
処理を施して再結晶を生じている軟化部分をも時
効硬化させ、成形品の全体を時効硬化組織とす
る。なお、前記の成形品に過時効組織が生じてい
ると時効硬化処理を施しても時効硬化組織となら
ぬのみならずさらに過時効となり、その部分のみ
が硬くならず応力集中を受け易くなる欠点を生ず
るから、前記の焼なましは折曲しようとする部分
のみを加熱軟化させるように行なうことが最適で
ある。なお、成形品の大部分か時効硬化組織のま
まであるから再度時効硬化処理を施しても組織変
化は生ぜず歪のないばね性に優れた折曲部分を有
する成形品を得ることができる。次に、本発明の
実施例を示す。 The copper alloy plate used in the present invention is an age-hardened copper alloy plate such as beryllium copper or titanium copper, which is aged by a conventional method, and the portion to be bent is bent using a gas burner, a trowel, or both sides. The material is annealed and softened by heating to the recrystallization temperature by appropriate means such as electrical heating using electrodes brought into contact. The purpose of this heating is to recrystallize only the part to be bent, so it should be done in a way that does not affect the adjacent parts as much as possible. Therefore, it is necessary to avoid as much as possible the formation of over-aged structures. For this purpose, electrical heating is most preferable, and the annealing temperature is preferably within 100° C. higher than the recrystallization temperature of the copper alloy plate. When the annealing temperature exceeds the above temperature range, adjacent parts are likely to be affected by heat. The copper alloy plate in which only the portion to be bent is softened in this manner is bent from the softened portion to form a desired shape. Note that the narrower the width of the softened portion and the greater the difference in hardness from other portions, the easier it is to bend with a smaller radius of curvature, making it possible to bend closely at 180°. Next, the entire molded article including the softened portion is subjected to age hardening treatment again to age harden the softened portion where recrystallization has occurred, thereby making the entire molded article have an age hardening structure. In addition, if an over-aged structure has formed in the above-mentioned molded product, not only will it not become an age-hardened structure even if it is subjected to age-hardening treatment, but it will also become over-aged, and only that part will not become hard and will be susceptible to stress concentration. Therefore, it is best to carry out the annealing so that only the portion to be bent is heated and softened. In addition, since most of the molded product remains in the age-hardened structure, even if the age-hardening treatment is performed again, no change in the structure occurs, and a molded product having bent portions with excellent spring properties without distortion can be obtained. Next, examples of the present invention will be shown.
実施例 １
Be1.8％（重量％、以下同じ）、Co＋Ni0.5％、
酸部Cuおよび不可避的不純物からなるベリリウ
ム銅合金板を幅30mm、厚さ0.2mmの条板状の銅合
金板１としてこれを常法により時効硬化させた。
次に、この銅合金板１の折曲しようとする所定部
分の両面に幅４mm、半径100mmのローラー状の電
極２を140Kgの力で当接させ、1.7mm／秒の速度で
回転させながら2/50秒通電、1/50秒停止の周期で
10000Aの電流をパルス状に通電し通電された部
分をこの銅合金材の再結晶温度より高い750℃に
加熱して焼なまして軟化させた。その硬度分布を
ビツカース硬度計により測定した結果は第４図に
Ａとして示すとおりであり、Hv140〜160の幅が
4.0mmの軟化部分３がHv310〜340の母材質部の中
央に形成された。これを第２図のように所望の形
状にプレスにて打抜き、その一端方部を前記軟化
部分３より180゜折曲げ、次いで、全体に炉内で
315℃60分の時効硬化処理を施して第３図に示さ
れるような折曲部分を有する成形品１ａを得た。
その硬度分布は第４図にＢとして示すとおりであ
り、折曲基部に相当する軟化部分３ａの硬度は
Hv320〜380にまで上昇し、その他の部分へ
Hv400〜430の硬度を示して成形品の全体が時効
硬化組織となつたことが確認された。このように
して得られた成形品はばね特性が極めて優れてお
り、また、歪がなく寸法精度に優れたものであつ
た。Example 1 Be 1.8% (weight%, same below), Co+Ni 0.5%,
A beryllium copper alloy plate consisting of acid part Cu and unavoidable impurities was made into a strip-shaped copper alloy plate 1 having a width of 30 mm and a thickness of 0.2 mm, and was age-hardened by a conventional method.
Next, a roller-shaped electrode 2 with a width of 4 mm and a radius of 100 mm is brought into contact with both sides of a predetermined portion of the copper alloy plate 1 to be bent with a force of 140 kg, and while rotating at a speed of 1.7 mm/sec. /With a cycle of energizing for 50 seconds and stopping for 1/50 seconds
A current of 10,000 A was applied in a pulsed manner, and the energized part was heated to 750°C, which is higher than the recrystallization temperature of this copper alloy material, and was annealed and softened. The hardness distribution was measured using a Bitkers hardness tester, and the results are shown as A in Figure 4, with a range of Hv140 to 160.
A softened portion 3 of 4.0 mm was formed in the center of the base material portion of Hv310-340. This is punched into a desired shape using a press as shown in Figure 2, one end of which is bent 180 degrees from the softened part 3, and then the whole is placed in a furnace.
A molded article 1a having a bent portion as shown in FIG. 3 was obtained by age hardening at 315° C. for 60 minutes.
The hardness distribution is shown as B in Fig. 4, and the hardness of the softened part 3a corresponding to the bent base is
Increases to Hv320-380 and goes to other parts
It was confirmed that the entire molded product had an age-hardened structure with a hardness of Hv400 to 430. The thus obtained molded product had extremely excellent spring properties, was free from distortion, and had excellent dimensional accuracy.
実施例 ２
Ti3.0％、残部Cuおよび不可避的不純物からな
るチタン銅合金板を幅50mm、厚さ0.3mmの条板状
の銅合金板となし、これを時効硬化させた。この
銅合金板の所定部分に予め900℃で10分間均熱さ
れたステンレス鋼製の８×50×50mmの鏝を５秒ず
つ順次接触させ焼なまして軟化させた。その硬度
は軟化部分でHv140、母材質部でHv300であつ
た。これをプレスにて打抜いた後に軟化部分より
180゜折曲げ、450℃60分の時効硬化処理を施して
成形品の全体を時効硬化組織とした。その硬度は
軟化部分においてHv280、その他の部分はHv320
であつた。Example 2 A titanium-copper alloy plate consisting of 3.0% Ti, balance Cu, and unavoidable impurities was made into a strip-shaped copper alloy plate with a width of 50 mm and a thickness of 0.3 mm, and this was age-hardened. A stainless steel trowel measuring 8 x 50 x 50 mm, pre-soaked at 900°C for 10 minutes, was brought into contact with a predetermined portion of the copper alloy plate for 5 seconds each to annealing and softening. The hardness was Hv140 in the softened part and Hv300 in the base material part. After punching this out with a press, the softened part
The molded product was bent at 180 degrees and subjected to age hardening treatment at 450°C for 60 minutes to give the entire molded product an age hardened structure. Its hardness is Hv280 in the softened part and Hv320 in other parts.
It was hot.
このようにして得られた成形品のばね限界値は
最後の時効硬化処理前の成形品に比較して50％増
大し、またその疲労強さは40％増大した。また、
最後の時効硬化処理における歪の発生は認められ
なかつた。 The spring limit value of the molded article thus obtained was increased by 50% compared to the molded article before the final age hardening treatment, and its fatigue strength was increased by 40%. Also,
No distortion was observed during the final age hardening treatment.
（発明の効果）
本発明は以上の説明からも明らかなように、時
効硬化させた銅合金板の折曲しようとする部分を
焼なまして軟化させ、該軟化部分より折曲げて成
形品とするので曲率半径の小さい180゜密着曲げ
のような折曲成形ができ、電子工業用ばね材等に
要求される小型化の要請に応えることができるも
のであり、また、折曲成形後に全体に時効硬化処
理を加えて時効硬化組織とするのでばね性が各部
において向上しており、全体のばね性に優れた成
形品を得ることができる。しかも、焼なましによ
り再結晶を生ずる部分はごくわずかであるから、
時効硬化処理による歪の発生はほとんどなく、寸
法精度の高い折曲成形品を得ることができるもの
で、本発明はコンピユーター用コネクターのよう
な電子工業用ばね材等に用いられる折曲部分を有
する時効硬化性銅合金製成形品の製造法として、
産業の発達に寄与するところ極めて大なものであ
る。(Effects of the Invention) As is clear from the above description, the present invention anneales and softens the portion of an age-hardened copper alloy plate that is to be bent, and bends it from the softened portion to form a molded product. Therefore, it is possible to perform bending such as 180° close bending with a small radius of curvature, and it can meet the demand for miniaturization required for spring materials for the electronic industry. Since the hardening treatment is applied to create an age-hardened structure, the springiness is improved in each part, and a molded product with excellent overall springiness can be obtained. Moreover, since the portion that recrystallizes due to annealing is very small,
There is almost no distortion caused by the age hardening treatment, and it is possible to obtain a bent molded product with high dimensional accuracy.The present invention has a bent part used in spring materials for the electronic industry such as computer connectors. As a manufacturing method for age-hardenable copper alloy molded products,
The contribution it makes to the development of industry is extremely large.
第１図、第２図、第３図は本発明の第１の実施
例の工程を示す一部切欠斜視図、第４図は本発明
の第１の実施例により得られた成形品の硬度分布
を示すグラフである。
１：銅合金板、１ａ：成形品、３，３ａ：軟化
部分。
Figures 1, 2, and 3 are partially cutaway perspective views showing the steps of the first embodiment of the present invention, and Figure 4 shows the hardness of the molded product obtained by the first embodiment of the present invention. It is a graph showing distribution. 1: Copper alloy plate, 1a: Molded product, 3, 3a: Softened portion.
Claims (1)
部分を焼なまして軟化させたのち該軟化部分より
折曲げて所望の形状に成形し、この成形品に時効
硬化処理を施して全体を時効硬化組織とすること
を特徴とする折曲部分を有する時効硬化性銅合金
製成形品の製造法。 ２ 銅合金板の折曲しようとする部分の焼なまし
を通電加熱により行うようにした特許請求の範囲
第１項記載の折曲部分を有する時効硬化性銅合金
製成形品の製造法。 ３ 銅合金板の折曲しようとする部分の焼なまし
を再結晶温度より高温側へ100℃以内の温度範囲
において行うようにした特許請求の範囲第１項ま
たは第２項記載の折曲部分を有する時効硬化性銅
合金製成形品の製造法。[Claims] 1. The part of the age-hardened copper alloy plate to be bent is annealed to soften it, then bent from the softened part and formed into a desired shape, and this molded product is subjected to age-hardening treatment. A method for manufacturing an age-hardenable copper alloy molded article having a bent portion, characterized in that the molded article is made of an age-hardenable copper alloy by subjecting the molded article to an age-hardening structure. 2. A method for manufacturing an age-hardenable copper alloy molded article having a bent portion as set forth in claim 1, wherein the portion of the copper alloy plate to be bent is annealed by electrical heating. 3. The bent portion according to claim 1 or 2, wherein the portion of the copper alloy plate to be bent is annealed at a temperature within 100°C higher than the recrystallization temperature. A method for manufacturing an age-hardenable copper alloy molded product having
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21306583A JPS60106954A (en) | 1983-11-11 | 1983-11-11 | Production of formed article made of age hardenable copper alloy having bent part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21306583A JPS60106954A (en) | 1983-11-11 | 1983-11-11 | Production of formed article made of age hardenable copper alloy having bent part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60106954A JPS60106954A (en) | 1985-06-12 |
| JPS6123859B2 true JPS6123859B2 (en) | 1986-06-07 |
Family
ID=16632948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21306583A Granted JPS60106954A (en) | 1983-11-11 | 1983-11-11 | Production of formed article made of age hardenable copper alloy having bent part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60106954A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0355643Y2 (en) * | 1987-02-24 | 1991-12-11 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4857811A (en) * | 1971-11-22 | 1973-08-14 |
-
1983
- 1983-11-11 JP JP21306583A patent/JPS60106954A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4857811A (en) * | 1971-11-22 | 1973-08-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60106954A (en) | 1985-06-12 |
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