JPS6182983A - Electrode tip for welding - Google Patents
Electrode tip for weldingInfo
- Publication number
- JPS6182983A JPS6182983A JP20189084A JP20189084A JPS6182983A JP S6182983 A JPS6182983 A JP S6182983A JP 20189084 A JP20189084 A JP 20189084A JP 20189084 A JP20189084 A JP 20189084A JP S6182983 A JPS6182983 A JP S6182983A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- electrode tip
- tip
- electrode
- conductive ceramics
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3009—Pressure electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、溶接用電極チップに関し、特に亜鉛系メッキ
鋼板で、そのスポット溶接に適した電極チップに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrode tip for welding, and particularly to an electrode tip suitable for spot welding galvanized steel sheets.
（従来の技術）
例えば、スポット溶接用電極チップに、ｃｕ−ｃｒ金合
金アルミナ分散銅が用いられているが、電極チップ寿命
が、冷延鋼板の場合と比べ、亜鉛メッキ輛板に対しては
劣る欠点がある。(Prior art) For example, Cu-Cr gold alloy alumina dispersed copper is used as an electrode tip for spot welding, but the life of the electrode tip is shorter than that of a cold-rolled steel plate and that of a galvanized steel plate. There are some disadvantages.
亜鉛系メッキ鋼板のスポット溶接における電極チップ寿
命は、周知のごとく、鋼板表ｍｌの亜鉛層が、溶接熱で
溶融してチップ表面に付層、熱拡散により電襖チップ表
層に、Ｚｎ−’Ｆｓ 、 Ｚｎ−Ｆｅ−Ｃｕ 。As is well known, the life of the electrode tip in spot welding of zinc-based plated steel sheets is determined by the fact that the zinc layer on the surface of the steel sheet melts due to welding heat and forms a layer on the tip surface, and due to thermal diffusion, Zn-'Fs , Zn-Fe-Cu.
Ｚｎ−Ｃｕ合金等を形成する。A Zn-Cu alloy or the like is formed.
連続スポット溶接 Ｘで、溶接熱による電極チップの軟
化変形と合せて、このＺｎ−Ｆｅ合金等の合金層の形成
、脱落が繰シ返されることで、電極チップの損耗が促進
される。亜鉛メッキ鋼板の電極チップ寿命は、メッキ厚
が大きくなるほど短命とな９、一方、溶融メッキ鋼板に
比べて、電気メツキ鋼板は、メッキ層表面が活性なため
、薄メッキにもか＼わらず、電極チップの寿命が劣る等
の欠点がある。In continuous spot welding X, the electrode tip is softened and deformed by welding heat, and the formation and falling off of the alloy layer such as Zn-Fe alloy is repeated, which accelerates the wear of the electrode tip. The life of the electrode tip of a galvanized steel sheet becomes shorter as the plating thickness increases.9 On the other hand, compared to a hot-dip galvanized steel sheet, the surface of the electroplated steel sheet is more active, so despite the thinner plating, There are disadvantages such as poor electrode tip life.
しかして特開昭５６−１゛５１１８０号公報記載のごと
く、Ｃｕベースの電極にＮｉ 、 Ｓｉ 、’Ｍｎを含
有せしめ、物理的性質、機械的性質の向上を計ることが
知られているが、上記のごとき欠点を解決することはで
きない。However, as described in JP-A-56-1-51180, it is known that Ni, Si, and Mn are contained in a Cu-based electrode to improve physical and mechanical properties. The above drawbacks cannot be overcome.
（発明が解決しようとする問題点）
本発明は、このような欠点を有利に解決し、長寿命の電
極チップを提供するものである。(Problems to be Solved by the Invention) The present invention advantageously solves these drawbacks and provides an electrode tip with a long life.
（問題点を解決するための手段）
本発明は、仮溶接材と接触する電極チップ表面を、導電
性セラミックスで構成した溶接用電極チップに関するも
のである。(Means for Solving the Problems) The present invention relates to a welding electrode tip in which the surface of the electrode tip that comes into contact with a temporary welding material is made of conductive ceramics.
即ち、本発明の導電性セラミックスとしては、例えば、
ＺｒＢ２． Ｔｉ８２等があシ、これらは融点約３００
０℃、熱伝導率２０〜３２ ）ｄ／ｍ・ｈｒ−℃、電気
抵抗１．５〜２．５ＸＩＯ−５Ω・Ｃｒｎ（鉄の１１５
）曲げ強度５０〜６０に２／ＩｕＩで、成型、溶射とも
可能な材質である。つまり、融点が高く、電気抵抗が小
さく、溶接用電極として最適である。That is, the conductive ceramics of the present invention include, for example,
ZrB2. Ti82, etc., have a melting point of about 300
0℃, thermal conductivity 20-32) d/m・hr-℃, electrical resistance 1.5-2.5XIO-5Ω・Crn (iron 115
) The material has a bending strength of 50 to 60 and 2/IuI, and can be molded or sprayed. In other words, it has a high melting point and low electrical resistance, making it ideal as a welding electrode.
このような材料を、例えば鉄等の金属表面に、溶射又は
嵌合等の手段により、電極チップ表面を構成するもので
あるが、その厚みは約１．０μｍ以上あればよい。勿論
電極全体を導電性セラミックスで構成することもできる
が、価格が高くなる。The surface of the electrode tip is formed by spraying or fitting such a material onto the surface of a metal such as iron, and the thickness thereof may be approximately 1.0 μm or more. Of course, the entire electrode can be made of conductive ceramics, but this increases the cost.
次に本発明を適用する一例であるスポット溶接について
、図面により説明する。Next, spot welding, which is an example to which the present invention is applied, will be explained with reference to the drawings.
図において、亜鉛系メッキ鋼板１．２の重ね合せ部に、
祇惚チップ５．６を図示のごとく、接触配置し、電極チ
ップ５．６間に通電して、メッキ鋼板１．２ケスポツト
溶接するものである。３はメッキ層、４は鋼板である。In the figure, at the overlapping part of the galvanized steel plates 1.2,
The ecstasy tips 5.6 are arranged in contact with each other as shown in the figure, and electricity is applied between the electrode tips 5.6 to weld 1.2 plated steel plates together. 3 is a plating layer, and 4 is a steel plate.
しかして本発明は、電極チップ５．６の表面を導電性セ
ラミックス７゜８で構成する。According to the present invention, the surface of the electrode tip 5.6 is made of conductive ceramic 7.8.
このような電極チップ５，６を用いて溶接すると、溶接
熱で溶融したメッキ層３は、チップ５゜６には付着しな
い。即ち、導電性セラミックスは、前述のごとき性質に
加え、溶融金属とは全くといっていい程反応しないので
、チップ５，６への溶融メッキ金属は付着しない。When welding is performed using such electrode tips 5 and 6, the plating layer 3 melted by welding heat does not adhere to the tips 5 and 6. That is, in addition to the above-mentioned properties, conductive ceramics do not react with molten metal at all, so the molten plated metal does not adhere to the chips 5 and 6.
つまり、従来のチップにおいては、溶融メッキ金属が付
着し、徐々に厚くなり、チップを損傷し、正常な溶接ナ
ゲツト形成を損い、溶接不良とな９、又チップ寿命を短
命にするが、本発明においては、このような欠点を確実
に解消するものでちる。In other words, in conventional tips, hot-dip plated metal adheres and gradually thickens, damaging the tip, impairing normal weld nugget formation, causing welding defects9, and shortening the tip's lifespan. The invention aims to reliably eliminate such drawbacks.
本発明においては、特にスポット溶接で、亜鉛又は亜鉛
を主体とするＦｅ、 Ｎ１． Ｃｏ、 Ｍｎ、 Ｃｕ。In the present invention, particularly in spot welding, zinc or zinc-based Fe, N1. Co, Mn, Cu.
Ｓｎ、Ｐ 等の１種又は２種以上含有する合金の溶融メ
ッキ、電気メツキ鋼板で、単層又は複層メッキ鋼板に可
動に適用できるが、スポット溶接の外、シーム溶接、抵
抗浴接の電極チップに適用できることは勿論である。Hot-dip plating or electroplating steel sheets of alloys containing one or more of Sn, P, etc. can be applied movably to single-layer or multi-layer plated steel sheets, but electrodes for spot welding, seam welding, and resistance bath welding can be used. Of course, it can be applied to chips.
次に本発明の実施例を比較例とともに挙げる。Next, examples of the present invention will be listed together with comparative examples.
第１表
注１：溶融メッキはメッキ厚１２ ｏ／１ｏｏ（Ｊ／ｍ
つの両面メッキ鋼板。゛電気メッキはメッキ厚２５ ／
２５ （？ ／ｍ′）の両面メッキ鋼板。Table 1 Note 1: Hot-dip plating has a plating thickness of 12 o/1oo (J/m
Double-sided plated steel plate.゛Electroplating has a plating thickness of 25/
25 (?/m') double-sided plated steel plate.
注２：チツプ寿命は連続スポット溶接を行ない、ナゲツ
ト形成可能な打点数にて評価した。Note 2: Chip life was evaluated by continuous spot welding and the number of welds that could form nuggets.
注３：溶接条件
■）加圧カニ２５ｏＫｙｆ（溶融メッキ）、２’ＯＯＫ
Ｂ （電気メッキ）。Note 3: Welding conditions■) Pressure crab 25oKyf (hot dip plating), 2'OOK
B (electroplating).
２）初期加圧時間’、 ２２ Ｈｚ
３）溶接時間 ：８Ｈｚ
４）保持時間 ：５Ｈｚ
５）溶接電流 ： ｌ ｌ ＫＡ
６）鋼種 ：軟鋼板（板厚０８門）７）チップ先
端径：５７φ（円錐せん類型）なお連続打点数は、ナゲ
ツト径３６つを下限として終点判定した。2) Initial pressurization time', 22 Hz 3) Welding time: 8 Hz 4) Holding time: 5 Hz 5) Welding current: l l KA 6) Steel type: Mild steel plate (plate thickness 08 gate) 7) Tip tip diameter: 57φ ( Cone type) The number of consecutive hits was determined as the end point with a lower limit of 36 nugget diameters.
注４：実施例３の付着物質は、ＺｒＢ２とＴｌＢ２
を混合溶射により付着した。実施例１．２も溶射付着し
た。Note 4: The deposited substances in Example 3 are ZrB2 and TlB2.
was attached by mixed thermal spraying. Examples 1.2 were also spray deposited.
注５：電極チップは、ステンレス表面に上記のとと（Ｚ
ｒＢ２等を付着した。Note 5: The electrode tip has the above mark (Z) on the stainless steel surface.
rB2 etc. were attached.
このように、本発明によれば優れた浴接性行が得られた
。Thus, according to the present invention, excellent bath wetting properties were obtained.
（発明の効果）
本発明によれば、溶接不良を解消し、又電極チップの寿
命を著しく延長できる等の効果が得られる。(Effects of the Invention) According to the present invention, effects such as eliminating welding defects and significantly extending the life of the electrode tip can be obtained.
第１図は１本発明の一例を示す脱明図である。 ３゛メツキ ７，８：導電性セラミックス第１図 FIG. 1 is a diagram showing an example of the present invention. 3゛Metsuki 7,8: Conductive ceramics Figure 1
Claims (1)
クスで構成した溶接用電極チップ。A welding electrode tip whose surface, which comes into contact with the material to be welded, is made of conductive ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20189084A JPS6182983A (en) | 1984-09-28 | 1984-09-28 | Electrode tip for welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20189084A JPS6182983A (en) | 1984-09-28 | 1984-09-28 | Electrode tip for welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6182983A true JPS6182983A (en) | 1986-04-26 |
Family
ID=16448525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20189084A Pending JPS6182983A (en) | 1984-09-28 | 1984-09-28 | Electrode tip for welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6182983A (en) |
-
1984
- 1984-09-28 JP JP20189084A patent/JPS6182983A/en active Pending
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