JPH07314151A - Resistance welding electrode - Google Patents
Resistance welding electrodeInfo
- Publication number
- JPH07314151A JPH07314151A JP10980994A JP10980994A JPH07314151A JP H07314151 A JPH07314151 A JP H07314151A JP 10980994 A JP10980994 A JP 10980994A JP 10980994 A JP10980994 A JP 10980994A JP H07314151 A JPH07314151 A JP H07314151A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- diameter
- area
- hole
- gradually
- 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
Links
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- Arc Welding In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、抵抗溶接用電極に関す
る。FIELD OF THE INVENTION The present invention relates to an electrode for resistance welding.
【０００２】[0002]
【従来の技術】従来、スポット溶接等の抵抗溶接用電極
は、例えば、特公昭５８−４６３９５号公報のスポット
溶接装置において記載されているように、ほぼ一定の外
径を有する棒状のものが用いられている。2. Description of the Related Art Conventionally, as a resistance welding electrode for spot welding or the like, a rod-shaped electrode having a substantially constant outer diameter is used, as described in, for example, Japanese Patent Publication No. 58-46395. Has been.
【０００３】ところが、スポット溶接やプロジェクショ
ン溶接に用いられる抵抗溶接用電極は、連続して継続さ
れる打点に伴って、先端がじょじょに押し潰されてゆく
ため、被溶接材に接触する面積がじょじょに増大してゆ
く。この結果、溶接部の電流密度が下がり、溶接強度が
不足してゆくため、電極はある段階で寿命となる。However, the resistance welding electrode used for spot welding or projection welding has its tip gradually crushed with continuous hitting points, so that the area of contact with the material to be welded gradually increases. Do it. As a result, the current density of the welded portion decreases and the welding strength becomes insufficient, so that the electrode reaches the end of its life at some stage.
【０００４】上記の電極の寿命を延ばす手段として、例
えば、溶接条件である電流値の制御を始め、電極そのも
のの改良が行われている。例えば、電極の改良として
は、高耐熱材料を電極のセンターに嵌め込んだ複合電極
や、へそ電極といって損耗しても被溶接材に接触する面
積が変化しないものがある。As a means for extending the life of the above-mentioned electrodes, for example, the control of the current value which is a welding condition has been started, and the electrodes themselves have been improved. For example, as an improvement of the electrode, there are a composite electrode in which a high heat-resistant material is fitted in the center of the electrode, and a navel electrode in which the area in contact with the material to be welded does not change even if it is worn.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記前
者の複合電極においては、中心部は耐熱、損耗に対して
抗力があるが、周辺部は本来の材質で構成されているた
め、周辺部の損耗にたいしてはその効果が期待できな
い。又、後者のへそ電極においては、連続した使用に伴
って経時的に被溶接材に接触する面積が減少してゆくた
め、内部の冷却水管の径も細くする必要があるため、構
造的に製作が難しいといった問題がある。However, in the former composite electrode, the central part has heat resistance and resistance to wear, but the peripheral part is made of the original material, and therefore wear of the peripheral part is prevented. For that, the effect cannot be expected. In addition, the latter navel electrode is structurally manufactured because it is necessary to reduce the diameter of the cooling water pipe inside because the area in contact with the material to be welded will decrease over time with continuous use. There is a problem that it is difficult.
【０００６】本発明は、このような上記の問題点に着目
してなされたものであり、その目的とするところは、こ
れらの問題点を解消し、電極の先端の被溶接材に接触す
る面積の変化を極力少なくして、電流密度の過度の低下
を抑え、寿命の長い抵抗溶接用電極を提供するにある。The present invention has been made by paying attention to the above problems, and an object thereof is to solve these problems and to provide an area where the tip of the electrode comes into contact with the material to be welded. To suppress the excessive decrease of the current density and provide a long-life resistance welding electrode.
【０００７】[0007]
【課題を解決するための手段】本発明の抵抗溶接用電極
においては、抵抗溶接用に用いられる棒状の電極であっ
て、この電極の軸方向と直交する断面積が先端より奥に
向かってが徐々に拡大され、且つ、中心部に穿設された
穴の面積が先端より奥に向かって徐々に拡大されている
ことを特徴とする。In the resistance welding electrode of the present invention, a rod-shaped electrode used for resistance welding, the cross-sectional area of which is orthogonal to the axial direction, extends from the tip to the back. It is characterized in that the area of the hole that is gradually expanded and that is formed in the center is gradually expanded from the tip to the inside.
【０００８】[0008]
【作用】本発明の抵抗溶接用電極においては、電極の軸
方向と直交する断面積が先端より奥に向かってが徐々に
拡大され、且つ、中心部に穿設された穴の面積が先端よ
り奥に向かって徐々に拡大されていることにより、電極
の先端の被溶接材に接触する面積の変化が極力少なくな
り、電流密度の過度の低下が抑えられるので、電極の寿
命を大幅に長くすることができる。In the resistance welding electrode of the present invention, the cross-sectional area orthogonal to the axial direction of the electrode is gradually expanded from the tip to the back, and the area of the hole formed in the center is smaller than the tip. By gradually expanding toward the back, the change in the area in contact with the material to be welded at the tip of the electrode is reduced as much as possible, and the excessive decrease in current density is suppressed, greatly extending the life of the electrode. be able to.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図１は、本発明の抵抗溶接用電極の一例を示す断
面図であり、図２は、図１の下面図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of the resistance welding electrode of the present invention, and FIG. 2 is a bottom view of FIG.
【００１０】図１、及び図２において、１は上方にセッ
トされて用いられる丸棒状の電極であり、１１は電極本
体であ、この電極本体１１の先端部１２には、先細とな
ったテーパ１２ａが形成されている。即ち、先端より奥
に入るにつれて徐々に直径が拡大されたものとなされて
いる。In FIGS. 1 and 2, reference numeral 1 denotes a round rod-shaped electrode which is used by being set upward, 11 denotes an electrode body, and a tip 12 of the electrode body 11 has a tapered taper. 12a is formed. That is, the diameter gradually increases as it goes deeper than the tip.
【００１１】先端部１２には、奥に入る程拡径された穴
１３が穿設され、奥太となったテーパ１３ａが形成され
ている。即ち、先端より奥に入るにつれて徐々に穴１３
の直径が拡大されてたものとなされている。The tip portion 12 is provided with a hole 13 whose diameter is increased as it goes deeper to form a tapered taper 13a. That is, the hole 13 gradually increases as it goes deeper than the tip.
It is said that the diameter of was enlarged.
【００１２】〔実施例の作用〕図３は、電極先端部の断
面図であり、図３の〔Ａ〕は、従来の電極の先端部の断
面図であり、図３の〔Ｂ〕は、本発明の抵抗溶接用電極
の先端部の断面図である。図３において、従来の電極１
０は、直径がｄ1 において、この時点の断面積がｓ1 で
ある。本発明の抵抗溶接用電極１は、直径がｄ2 におい
て、この時点の断面積がｓ2である。[Operation of Embodiment] FIG. 3 is a cross-sectional view of the tip of the electrode, FIG. 3A is a cross-sectional view of the tip of the conventional electrode, and FIG. It is sectional drawing of the front-end | tip part of the electrode for resistance welding of this invention. In FIG. 3, the conventional electrode 1
0 is the diameter d 1 and the cross-sectional area at this point is s 1 . In the resistance welding electrode 1 of the present invention, the diameter is d 2 , and the cross-sectional area at this point is s 2 .
【００１３】上記のそれぞれの電極の直径が同じ、即ち
ｄ1 ＝ｄ2 であるときには、電極１には中心部に穴１３
が設けられているので、断面積はｓ1 ＞ ｓ2 となる。
従って、同一条件で溶接を行う場合には、断面積をｓ1
＝ ｓ2 とするために、ｄ2 をｄ1 より大きく設定する
こととなる。When the respective electrodes have the same diameter, that is, d 1 = d 2 , the electrode 1 has a hole 13 at the center thereof.
Is provided, the cross-sectional area is s 1 > s 2 .
Therefore, when welding is performed under the same conditions, the cross-sectional area is s 1
In order to set = s 2 , d 2 is set to be larger than d 1 .
【００１４】溶接部のナゲットは、電極の先端の被溶接
材への接触形状に対応して形成される。従って、従来の
電極１０と本発明の抵抗溶接用電極１の先端の接触面積
が等しくｓ1 ＝ ｓ2 のときには、本発明の抵抗溶接用
電極１の直径ｄ2 は、従来の電極の直径ｄ1 より上記の
説明のように大きくなり、当然ナゲットの外径も大きく
なる。従って、溶接強度は従来に比べて大きくすること
ができる。The nugget of the welded portion is formed corresponding to the contact shape of the tip of the electrode with the material to be welded. Therefore, when the contact areas of the tips of the conventional electrode 10 and the resistance welding electrode 1 of the present invention are equal to each other and s 1 = s 2 , the diameter d 2 of the resistance welding electrode 1 of the present invention is the diameter d of the conventional electrode. It becomes larger than 1 as described above, and naturally the outer diameter of the nugget also becomes larger. Therefore, the welding strength can be increased as compared with the conventional one.
【００１５】又、本発明の抵抗溶接用電極１において
は、継続的に使用されて先端部が損耗してゆき直径ｄ2
が徐々に拡大されていっても、それに伴って穴径も徐々
に拡大されてゆくので、実質上の接触面積の増加率はそ
れほど大きくなく、従来の電極に比べて、電流密度の過
度の低下が抑えられて溶接条件も安定し、その寿命を大
幅に延長して使用することが可能となる。Further, in the resistance welding electrode 1 of the present invention, the tip portion is worn continuously as it is continuously used, and the diameter d 2
, The hole diameter also gradually increases, so the actual contact area increase rate is not so large, and the current density is excessively reduced compared to conventional electrodes. The welding conditions are suppressed and the welding conditions are stabilized, and it is possible to greatly extend the service life of the welding.
【００１６】[0016]
【発明の効果】本発明の抵抗溶接用電極においては、電
極の軸方向と直交する断面積が先端より奥に向かってが
徐々に拡大され、且つ、中心部に穿設された穴の面積が
先端より奥に向かって徐々に拡大されていることによ
り、電極の先端の被溶接材に接触する面積の変化が極力
少なくなり、電流密度の過度の低下が抑えられるので、
電極の寿命を大幅に長くすることができる。従って、抵
抗溶接用電極として好適である。In the resistance welding electrode of the present invention, the cross-sectional area orthogonal to the axial direction of the electrode is gradually expanded from the tip to the back, and the area of the hole formed in the center is By gradually expanding from the tip toward the back, the change in the area of the tip of the electrode in contact with the material to be welded is minimized and the excessive decrease in current density is suppressed.
The life of the electrode can be significantly extended. Therefore, it is suitable as an electrode for resistance welding.
【図１】本発明の抵抗溶接用電極の一例を示す断面図。FIG. 1 is a sectional view showing an example of a resistance welding electrode of the present invention.
【図２】図１の下面図。FIG. 2 is a bottom view of FIG.
【図３】電極先端部の断面図であり、〔Ａ〕は、従来の
電極の先端部の断面図。〔Ｂ〕は、本発明の抵抗溶接用
電極の先端部の断面図。FIG. 3 is a cross-sectional view of a tip portion of an electrode, and [A] is a cross-sectional view of the tip portion of a conventional electrode. [B] is sectional drawing of the front-end | tip part of the electrode for resistance welding of this invention.
１ 電極 １０ 従来の電極 １１ 電極本体 １２ 先端部 １２ａ、１３ａ テーパ １３ 穴 ｄ1 従来の電極の直径 ｄ2 本発明の抵抗溶接用電極の直径 ｓ1 従来の電極の断面積 ｓ2 本発明の抵抗溶接用電極の断面積1 electrode 10 conventional electrode 11 the electrode body 12 distal portion 12a, 13a taper 13 hole d 1 resistance of the cross-sectional area s 2 present invention with a diameter of s 1 conventional electrodes of the resistance welding electrode having a diameter d 2 the invention conventional electrode Cross-sectional area of welding electrode
Claims (1)
って、この電極の軸方向と直交する断面積が先端より奥
に向かってが徐々に拡大され、且つ、中心部に穿設され
た穴の面積が先端より奥に向かって徐々に拡大されてい
ることを特徴とする抵抗溶接用電極。1. A rod-shaped electrode used for resistance welding, wherein the cross-sectional area of the electrode orthogonal to the axial direction is gradually enlarged from the tip to the back and is bored in the center. The electrode for resistance welding is characterized in that the area of the hole is gradually enlarged from the tip toward the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10980994A JPH07314151A (en) | 1994-05-24 | 1994-05-24 | Resistance welding electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10980994A JPH07314151A (en) | 1994-05-24 | 1994-05-24 | Resistance welding electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07314151A true JPH07314151A (en) | 1995-12-05 |
Family
ID=14519757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10980994A Pending JPH07314151A (en) | 1994-05-24 | 1994-05-24 | Resistance welding electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07314151A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000023224A1 (en) * | 1998-10-20 | 2000-04-27 | Akihiro Saito | Resistance welding electrode tip |
-
1994
- 1994-05-24 JP JP10980994A patent/JPH07314151A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000023224A1 (en) * | 1998-10-20 | 2000-04-27 | Akihiro Saito | Resistance welding electrode tip |
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