JPS644290B2 - - Google Patents
Info
- Publication number
- JPS644290B2 JPS644290B2 JP1954179A JP1954179A JPS644290B2 JP S644290 B2 JPS644290 B2 JP S644290B2 JP 1954179 A JP1954179 A JP 1954179A JP 1954179 A JP1954179 A JP 1954179A JP S644290 B2 JPS644290 B2 JP S644290B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- screw
- contact
- cylindrical base
- cylindrical
- 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
- 239000000463 material Substances 0.000 claims description 34
- 238000003466 welding Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000005219 brazing Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 description 11
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Description
本発明は、ねじ型接点の製造方法に関する。
従来、ねじ型接点を作るには、第１図ａに示す
如く棒材１の先端部に切削加工により小径の突起
２を同心に成形するか又は鎖線の如く先端外周縁
にテーパ２′を付し、引き続き棒材１の外周面に
切削加工によりねじ３を成形し、所定の寸法に切
断して円柱型台材４となし、次に第１図ｂに示す
如く円柱型台材４の基端に切削加工によりすり割
り５を設け、次いで円柱型台材４の先端面に第１
図ｃに示す如く接点材６を溶接又はろう付けし
て、ねじ型接点７を作つていた。
然し乍ら、かかるねじ型接点の製造方法によつ
て得られたねじ型接点７の外周面のねじ３は、切
削加工により成形されたものである為表面が柔か
く且つ粗いので、台材４の先端面に接点材６を溶
接すべく外周面を把持するとねじ３が損傷し、ま
たしつかり把持しないと溶接強度がばらつき且つ
低下するものであり、さらにすり割り５の部分に
はばりが形成されている為このすり割り５の部分
を把持した際不安定となるものである。さらに台
材４の先端面に接点材６をろう付けした場合に
は、フラツクスや酸化皮膜を取る為酸洗いを行つ
ているが、ねじ３の表面が不均一に減つてねじ３
の径がばらつくものである。
本発明はかかる問題点を解決すべくなされたも
のであり、溶接又はろう付け時にねじの損傷のな
い、且つねじ径の均一な、さらにすり割りの部分
にばりが生じにくいまた生じても除去しやすい、
生産性の高いねじ型接点の製造方法を提供せんと
するものである。
本発明によるねじ型接点の製造方法は、第２図
ａに示す如く上端に小径の突起２を同心に設ける
か又は鎖線の如く該突起２の外周縁にテーパ２′
を設け、下端に小径の円柱部４ａを設け且つその
円柱部４ａにすり割り５を設けた円柱型台材４′
の上面中央に第２図ｂに示す如く接点材６を溶接
又はろう付けにて取付け、次いで円柱型台材４′
の外周面に転造加工により第２図ｃに示す如く前
記小径の円柱部４ａの径よりも大きい谷径のねじ
３を成形して、ねじ型接点７′を作ることを特徴
とするものである。
本発明のねじ型接点の製造方法に於いて、円柱
型台材４′の外周面にねじ３を成形する前に、円
柱型台材４′の上面中央に接点材６を取付ける理
由は、接点材６の溶接時に円柱型台材４′の外周
面を把持してもねじ３を損傷させずに円柱型台材
４′の外周面をしつかり把持して溶接強度を高く
し且つばらつきを小さくする為である。また接点
材６をろう付けした場合、酸洗いによりねじ３の
径のばらつくのを無くする為である。
また円柱型台材４′の外周面に転造加工により
ねじ３を成形する理由は、切削加工では円柱型台
材４′を把持しなければならないが実際にはねじ
３を成形する部分以外の個所は寸法が極めて小さ
い為把持することが困難であり、仮に把持しても
切削時に片寄つた芯ずれを起したりして寸法精度
の高いねじ３を成形することが困難であるからで
あり、また転造加工の方が連続的に各円柱型台材
４′にねじ３を成形することができて生産性が高
いからである。
さらに転造加工により成形される円柱型台材
４′の外周面に成形されるねじ３の谷径を、下端
の小径の円柱部４ａの径よりも大きく、換言すれ
ばねじ３の谷径よりも円柱部４ａの径を小さくす
る理由は、転造加工によるねじ３の成形では塑性
変形により材料が半径方向に変形するので、円柱
部４ａがねじ３の谷径以上であると、転造加工工
具に当接して円柱部４ａのすり割り５のある部分
がすり割り５の幅が狭くなり、ドライバーがすり
割り５に入らなくなり、逆に円柱部４ａがねじ３
の谷径以下であると、転造工具が当接することが
なく、円柱部４ａがすり割り５の幅が狭くなるこ
とがないからである。勿論円柱部４ａの径が小さ
すぎると、すり割り５の側壁が薄くなつて、該側
壁がドライバーによつて破壊される恐れがあるの
で、円柱部４ａの径はねじ３の谷径よりも僅かに
小さい程度で良く、またねじ３の谷径はできるだ
け大きい方が好ましい。
次に本発明の具体的な実施例と従来例について
説明する。
〔実施例〕
直径1.84mmの棒材１の先端部に切削加工により
直径1.0mmの突起２を同心に成形して長さ5.6mmに
切断して円柱型台材４′となすと共にその切断端
に切削加工により直径1.6mm、長さ1.0mmの円柱部
４ａを設け、その円柱部４ａに幅0.4mm、深さ0.7
mmのすり割り５を設けて第２図ａに示す如く円柱
台材４′となし、次にこの円柱型台材４′の突起２
上面に第２図ｂの如く高さ0.2mmの接点材６を溶
接にて取付け、次いで円柱型台材４′の外周面に
転造加工により第２図ｃに示す如く前記すり割り
５の径よりも大きい1.68mmの谷径で、1.97mmの山
径のねじ３を成形して、ねじ型接点７′を作つた。
〔従来例〕
第１図ａに示す如く直径2.00mmの棒材１の先端
部に切削加工により直径1.0mmの突起２を同心に
成形し、引き続き棒材１の外周面に切削加工によ
り山径1.97mm谷径1.68mmのねじ３を成形し、長さ
5.7mmに切断して円柱型台材４となし、次に第１
図ｂに示す如く円柱型台材４の基端に切削加工に
より幅0.4mm深さ0.7mmのすり割り５を設け、次い
で円柱型台材４の突起２の先端に第１図ｃに示す
如く高さ0.2mmの接点材６を溶接してねじ型接点
７を作つた。
然して実施例のねじ型接点７′と従来例のねじ
型接点７を夫々100ケについて外周のねじ３を測
定したところ、下表に示すような結果を得た。
The present invention relates to a method of manufacturing a screw type contact. Conventionally, in order to make a screw type contact, as shown in Fig. 1a, a small-diameter protrusion 2 is formed concentrically on the tip of a bar 1 by cutting, or a taper 2' is attached to the outer periphery of the tip as shown in chain lines. Then, screws 3 are formed by cutting on the outer circumferential surface of the bar 1, and cut to a predetermined size to form a cylindrical base 4. Next, as shown in FIG. 1b, the base of the cylindrical base 4 is cut. A slot 5 is provided at the end by cutting, and then a first
As shown in Figure c, a screw-type contact 7 was made by welding or brazing the contact material 6. However, since the thread 3 on the outer peripheral surface of the threaded contact 7 obtained by this method of manufacturing a threaded contact is formed by cutting, the surface is soft and rough, so the tip surface of the base material 4 is soft and rough. If the outer peripheral surface is gripped to weld the contact material 6 to the screw 3, the screw 3 will be damaged, and if the contact material 6 is not gripped firmly, the welding strength will vary and decrease, and burrs will be formed at the slot 5. Therefore, when gripping this slotted portion 5, it becomes unstable. Furthermore, when the contact material 6 is brazed to the tip surface of the base material 4, pickling is performed to remove flux and oxide film, but the surface of the screw 3 is unevenly reduced.
The diameter varies. The present invention has been made to solve these problems, and has a structure that prevents damage to the screws during welding or brazing, has a uniform screw diameter, and is less likely to generate burrs in the slotted portions, and can be removed even if they occur. Cheap,
The present invention aims to provide a highly productive method for manufacturing screw-type contacts. The method for manufacturing a screw-type contact according to the present invention is to provide a small-diameter projection 2 concentrically at the upper end as shown in FIG.
A cylindrical base material 4' having a small diameter cylindrical part 4a at the lower end and a slot 5 in the cylindrical part 4a.
The contact material 6 is attached to the center of the upper surface by welding or brazing as shown in Fig. 2b, and then the cylindrical base material 4'
The screw type contact 7' is formed by forming a screw 3 having a root diameter larger than the diameter of the small diameter cylindrical part 4a as shown in FIG. 2c by rolling on the outer peripheral surface of the contact. be. In the method for manufacturing a threaded contact of the present invention, the reason why the contact material 6 is attached to the center of the upper surface of the cylindrical base material 4' before forming the screw 3 on the outer peripheral surface of the cylindrical base material 4' is to Even if the outer peripheral surface of the cylindrical base material 4' is gripped during welding of the material 6, the screw 3 is not damaged even if the outer peripheral surface of the cylindrical base material 4' is firmly gripped, thereby increasing welding strength and reducing variation. It is for the purpose of Further, when the contact material 6 is brazed, the purpose is to eliminate variations in the diameter of the screw 3 due to pickling. Furthermore, the reason why the screw 3 is formed by rolling on the outer peripheral surface of the cylindrical base material 4' is that although the cylindrical base material 4' must be gripped during the cutting process, in reality, the part other than the part where the screw 3 is formed is This is because the dimensions of these parts are extremely small, making it difficult to grip them, and even if they were to be gripped, they would be offset and misaligned during cutting, making it difficult to form a screw 3 with high dimensional accuracy. Further, the rolling process allows the screws 3 to be continuously formed on each cylindrical base material 4', resulting in higher productivity. Furthermore, the root diameter of the screw 3 formed on the outer peripheral surface of the cylindrical base material 4' formed by rolling is larger than the diameter of the small diameter cylindrical part 4a at the lower end, in other words, the root diameter of the screw 3 is larger than the diameter of the small diameter cylindrical part 4a at the lower end. The reason why the diameter of the cylindrical portion 4a is made smaller is that when forming the screw 3 by rolling, the material deforms in the radial direction due to plastic deformation. When the tool comes into contact with the slot 5 of the cylindrical part 4a, the width of the slot 5 becomes narrower, and the screwdriver cannot enter the slot 5.
This is because if the valley diameter is less than or equal to , the rolling tool will not come into contact with it, and the width of the slot 5 in the columnar portion 4a will not become narrow. Of course, if the diameter of the cylindrical portion 4a is too small, the side wall of the slot 5 will become thin and there is a risk that the side wall will be destroyed by a screwdriver. The root diameter of the screw 3 is preferably as large as possible. Next, specific embodiments of the present invention and conventional examples will be described. [Example] A protrusion 2 with a diameter of 1.0 mm is formed concentrically on the tip of a bar 1 with a diameter of 1.84 mm by cutting, and the protrusion 2 with a diameter of 1.0 mm is cut into a length of 5.6 mm to form a cylindrical base material 4'. A cylindrical part 4a with a diameter of 1.6 mm and a length of 1.0 mm is provided by cutting, and the cylindrical part 4a has a width of 0.4 mm and a depth of 0.7 mm.
A slot 5 of mm is provided to form a cylindrical base 4' as shown in Fig. 2a, and then a projection 2 of this cylindrical base 4' is formed.
A contact material 6 with a height of 0.2 mm is attached to the upper surface by welding as shown in Fig. 2b, and then the diameter of the slot 5 is formed by rolling on the outer peripheral surface of the cylindrical base material 4' as shown in Fig. 2c. A threaded contact 7' was made by molding a screw 3 with a root diameter of 1.68 mm and a thread diameter of 1.97 mm. [Conventional example] As shown in Fig. 1a, a protrusion 2 with a diameter of 1.0 mm is formed concentrically on the tip of a bar 1 with a diameter of 2.00 mm by cutting, and then a protrusion 2 with a diameter of 1.0 mm is formed concentrically on the outer peripheral surface of the bar 1 by cutting. Molded screw 3 with a root diameter of 1.97mm and 1.68mm, and the length
Cut to 5.7mm to make cylindrical base material 4, then the first
As shown in Figure b, a slot 5 with a width of 0.4 mm and a depth of 0.7 mm is provided by cutting at the base end of the cylindrical base 4, and then at the tip of the protrusion 2 of the cylindrical base 4 as shown in Figure 1 c. A screw-type contact 7 was made by welding contact material 6 with a height of 0.2 mm. However, when the outer circumferential threads 3 of 100 threaded contacts 7' of the embodiment and 100 conventional threaded contacts 7 were measured, the results shown in the table below were obtained.
【表】
なおＲは測定値の最大値と最小値との差（ばら
つき）を示す。
上記表で明らかなように本発明の製造方法によ
つて得られたねじ型接点７′は、従来の製造方法
によつて得られたねじ型接点７に比しねじ３の表
面が硬く滑らかであり、またねじ径のばらつきが
小さく、さらにすり割り５の部分には全くばりが
無いものである。
また前記実施例のねじ型接点７′と従来例のね
じ型接点７各100ケに於ける接点材６の溶接強度
を測定したところ、実施例のものは平均で5.5
Kg／cm2であつたに対し従来例のものは平均で4.9
Kg／cm2で、実施例のものがはるかに高かつた。ま
たその溶接強度のばらつきは、実施例のものが
0.85Kg／cm2であつたのに対し、従来例のものは
1.18Kg／cm2で、実施例のものが極めて小さかつ
た。
以上詳記した通り本発明のねじ型接点の製造方
法によれば、接点材を円柱型台材に溶接又はろう
付にて取付けた後、転造加工にてねじを成形する
ので、従来のように接点材の溶接又はろう付時に
ねじを損傷することがなく、またねじが転造によ
る塑性加工によつて成形されるので、ねじの表面
が硬く滑らかでねじ径のばらつきが小さく、さら
にすり割りをねじの設けていない円柱部に設ける
ので、ばりは生じにくく、仮にばりが発生しても
ねじがないので除くことも容易にでき、しかも転
造加工によるねじ形がなされてねじ型接点の生産
性が大巾に向上する等の優れた効果がある。[Table] Note that R indicates the difference (dispersion) between the maximum and minimum measured values. As is clear from the above table, the threaded contact 7' obtained by the manufacturing method of the present invention has a harder and smoother surface of the screw 3 than the threaded contact 7 obtained by the conventional manufacturing method. Moreover, the variation in the thread diameter is small, and there is no burr at all in the slot 5 part. In addition, when the welding strength of the contact material 6 was measured for each of 100 threaded contacts 7' of the above embodiment and 100 threaded contacts 7 of the conventional example, the welding strength of the threaded contacts 7' of the embodiment was 5.5 on average.
Kg/ cm2 , whereas the conventional model averaged 4.9
Kg/cm 2 was much higher in the example. Also, the variation in welding strength is that of the example.
It was 0.85Kg/ cm2 , while the conventional one
The weight of the example was 1.18Kg/cm 2 , which was extremely small. As described in detail above, according to the method for manufacturing a threaded contact of the present invention, the contact material is attached to the cylindrical base material by welding or brazing, and then the thread is formed by rolling, which is different from the conventional method. There is no damage to the screw when welding or brazing the contact material, and since the screw is formed by plastic processing by rolling, the surface of the screw is hard and smooth, there is little variation in the screw diameter, and it is easy to slot. Since the burrs are provided on the cylindrical part without threads, burrs are less likely to occur, and even if burrs occur, they can be easily removed because there are no threads.Furthermore, the threaded shape is created by rolling, making it possible to produce threaded contacts. It has excellent effects such as greatly improving performance.
第１図ａ，ｂ，ｃは従来のねじ型接点の製造方
法の工程説明図、第２図ａ，ｂ，ｃは本発明のね
じ型接点の製造方法の工程説明図である。
２……突起、２′……テーパ、３……ねじ、
４′……円柱型台材、４ａ……小径の円柱部、５
……すり割り、６……接点材、７′……ねじ型接
点。
FIGS. 1A, 1B, and 1C are process explanatory diagrams of a conventional method for manufacturing a screw-type contact, and FIGS. 2A, 2B, and 2C are process explanatory diagrams of a method for manufacturing a screw-type contact according to the present invention. 2...protrusion, 2'...taper, 3...screw,
4'... Cylindrical base material, 4a... Small diameter cylindrical part, 5
...Slot, 6...Contact material, 7'...Screw type contact.
Claims (1)
起の外周縁にテーパを設け、下端に小径の円柱部
を設け且つその円柱部にすり割りを設けた円柱型
台材の上面中央に接点材を溶接又はろう付けにて
取付け、次いで円柱型台材の外周面に転造加工に
より前記小径の円柱部の径よりも大きい谷径のね
じを成形することを特徴とするねじ型接点の製造
方法。1. A contact material is placed in the center of the upper surface of a cylindrical base that has a small-diameter protrusion concentrically provided on the upper end or a taper on the outer periphery of the protrusion, a small-diameter cylindrical portion on the lower end, and a slot in the cylindrical portion. A method for manufacturing a threaded contact, characterized in that the screw is attached by welding or brazing, and then a thread having a root diameter larger than the diameter of the small diameter cylindrical part is formed on the outer peripheral surface of the cylindrical base material by rolling processing. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1954179A JPS55111024A (en) | 1979-02-21 | 1979-02-21 | Method of manufacturing threaded contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1954179A JPS55111024A (en) | 1979-02-21 | 1979-02-21 | Method of manufacturing threaded contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55111024A JPS55111024A (en) | 1980-08-27 |
| JPS644290B2 true JPS644290B2 (en) | 1989-01-25 |
Family
ID=12002167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1954179A Granted JPS55111024A (en) | 1979-02-21 | 1979-02-21 | Method of manufacturing threaded contact |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55111024A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049255C (en) * | 1992-12-04 | 2000-02-09 | 凯梅蒂克斯国际公司 | Electrolytic production of hydrogen peroxide using bipolar membranes |
| US11136067B2 (en) | 2017-07-07 | 2021-10-05 | Honda Motor Co., Ltd. | Vehicle roof structure |
-
1979
- 1979-02-21 JP JP1954179A patent/JPS55111024A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049255C (en) * | 1992-12-04 | 2000-02-09 | 凯梅蒂克斯国际公司 | Electrolytic production of hydrogen peroxide using bipolar membranes |
| US11136067B2 (en) | 2017-07-07 | 2021-10-05 | Honda Motor Co., Ltd. | Vehicle roof structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55111024A (en) | 1980-08-27 |
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