JPH03230872A - Projection welding electrode - Google Patents
Projection welding electrodeInfo
- Publication number
- JPH03230872A JPH03230872A JP2441290A JP2441290A JPH03230872A JP H03230872 A JPH03230872 A JP H03230872A JP 2441290 A JP2441290 A JP 2441290A JP 2441290 A JP2441290 A JP 2441290A JP H03230872 A JPH03230872 A JP H03230872A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- welded
- heat
- materials
- welding
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000003779 heat-resistant material Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 2
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 description 4
- ZTXONRUJVYXVTJ-UHFFFAOYSA-N chromium copper Chemical compound [Cr][Cu][Cr] ZTXONRUJVYXVTJ-UHFFFAOYSA-N 0.000 description 4
- 238000007665 sagging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Resistance Welding (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、重ね抵抗溶接の一種であるプロジェクショ
ン溶接に用いる電極の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in electrodes used in projection welding, which is a type of lap resistance welding.
（従来の技術）
良く知られているようにプロジェクション溶接は、被溶
接物の接合部に突起を作っておき、その突起の部分に溶
接電流を集中させて発熱させ、ナゲツトを効果的に確実
に形成するようにした抵抗溶接法である。(Prior art) As is well known, in projection welding, a protrusion is created at the joint of the workpiece, and the welding current is concentrated on the protrusion to generate heat, effectively and reliably welding the nugget. This is a resistance welding method in which the
従来の一般的なプロジェクション溶接用電極はクロム銅
あるいはクロム・ジルコニウム銅を用いて構成されてい
た。この種の材料からなる２つの電極で重ね合わせた被
溶接物の突起を中心とした部分を強く挟み込み、両電極
間に通電する。Conventional general projection welding electrodes have been constructed using chromium copper or chromium-zirconium copper. Two electrodes made of this type of material are tightly sandwiched between two overlapping objects to be welded, around the protrusion, and electricity is applied between the two electrodes.
（発明が解決しようとする課題）
プロジェクション溶接用電極材料に要求される物性とし
ては、耐熱性が高くて高温での力学的緒特性の良好なこ
とや、被溶接物との溶着が起こりにくいこと、被溶接物
との接触抵抗が小さいこと、仕上げ面が良好にできるこ
と、冷却のため熱伝導率が大きいことなどがある。(Problem to be solved by the invention) The physical properties required of electrode materials for projection welding include high heat resistance and good mechanical properties at high temperatures, and resistance to welding with the workpiece. , low contact resistance with the workpiece, good surface finish, and high thermal conductivity for cooling.
従来の電極材料であるクロム銅やクロム・ジルコニウム
銅では、亜鉛鋼板などを溶接する際に、被溶接物の亜鉛
メツキと溶着が起きやすく、電極表面が荒れてしまい、
度々手入れをしなければならないという欠点があった。When using conventional electrode materials such as chromium copper or chromium-zirconium copper, when welding galvanized steel sheets, etc., the zinc plating and welding of the workpiece tend to occur, and the electrode surface becomes rough.
The drawback was that it required frequent maintenance.
またステンレス鋼などの溶接に対しても、高温硬さが充
分でないため熱により電極のへタリが起きやすいという
問題があった。Furthermore, when welding stainless steel, etc., there is a problem in that the electrodes tend to sag due to heat because they do not have sufficient high-temperature hardness.
この発明は前述した従来の問題点に鑑みてなされたもの
で、被溶接物との溶着や熱によるヘタリが起きにくい耐
久性の高いプロジェクション溶接用電極を提供すること
にある。The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a highly durable projection welding electrode that is less prone to welding with objects to be welded or to becoming sagging due to heat.
（課題を解決するための手段）
そこでこの発明は、電極の被溶接物に圧接する面におい
て、ナゲツトが形成される被溶接物の突起に対応する部
分を他の部分より高耐熱性の材料で構成し、前記他の部
分を良導電性の材料で構成した。(Means for Solving the Problems) Therefore, the present invention provides that, on the surface of the electrode that comes into pressure contact with the workpiece, the part corresponding to the protrusion of the workpiece where nuggets are formed is made of a material with higher heat resistance than other parts. The other parts were made of a highly conductive material.
（作 用）
被溶接物との溶着や熱によるヘタリが起きるのは、最も
高温になるナゲツトの近くである。つまり被溶接物の突
起形成部分に圧接する電極表面に最も熱が伝わりやすく
、その部分で溶着やヘタリが起きる。そこでこの部分を
他の部分より高耐熱性の材料で構成すれば、溶着やヘタ
リが起きにくくなる。溶接電流の通路としては前記他の
部分が主な役割を果たす。(Function) Welding with the object to be welded and sagging due to heat occur near the nugget, where the temperature is highest. In other words, heat is most easily transferred to the surface of the electrode that is in pressure contact with the protrusion-forming portion of the workpiece, and welding and sagging occur at that portion. Therefore, if this part is made of a material with higher heat resistance than other parts, welding and deformation will be less likely to occur. The other portion plays a main role as a welding current path.
（実 施 例）
第１図に本発明の実施例を示している。同図において１
と２は例えば亜鉛鋼板からなる平板状の被溶接物であり
、被溶接物２の側に４つの突起２ａを形成しである。３
と４が本発明を適用した電極であり、主要部分は良導電
性の金属であるクロム銅あるいはクロム・ジルコニウム
銅（従来の電極材料と同じ）からなり、被溶接物１，２
と接触する表面部分に局部的に高耐熱性部材３ａ、４ａ
を埋め込んだ形になっている。(Example) FIG. 1 shows an example of the present invention. In the same figure, 1
2 is a flat plate-shaped workpiece made of, for example, a galvanized steel plate, and four protrusions 2a are formed on the side of the workpiece 2. 3
and 4 are electrodes to which the present invention is applied, and the main parts are made of chromium copper or chromium-zirconium copper (same as conventional electrode materials), which are metals with good conductivity.
Highly heat resistant members 3a, 4a are locally attached to the surface portions that come into contact with the
It has a shape that embeds it.
電極３における高耐熱性部材３ａは、被溶接物２の４個
の突起２ａの位置に合わせて４個の円柱状部材を配置し
たものである。電極４においてもまったく同様に４個の
高耐熱性部材４ａを配設している。電極３．４の何れに
おいても高耐熱性部材３ａ、４ａと他の部分は面一にな
っている。The highly heat-resistant member 3a of the electrode 3 is made up of four cylindrical members arranged in accordance with the positions of the four protrusions 2a of the object to be welded 2. In the electrode 4, four highly heat-resistant members 4a are arranged in exactly the same manner. In any of the electrodes 3.4, the highly heat resistant members 3a, 4a and other parts are flush with each other.
ここで高耐熱性部材３ａ、４ａの材料としては、アルミ
ナやジルコニアとのセラミックス部材を用いてもよいし
、タングステンやモリブデン等の高融点金属を用いても
よい。前者のセラミックス部材を用いる場合はこれが非
導電性であるが、溶接電流がクロム銅やクロム・ジルコ
ニウム銅からなる電極の他の部分を通して流れる。Here, as the material of the highly heat-resistant members 3a and 4a, a ceramic member such as alumina or zirconia may be used, or a high melting point metal such as tungsten or molybdenum may be used. When the former ceramic member is used, it is non-conductive, but the welding current flows through other parts of the electrode made of chromium copper or chromium-zirconium copper.
第２図に示すように、電極３と４の端面間に被溶接物１
と２を重ねて位置決め配置し、電極３゜４で被溶接物１
，２を加圧する。このとき被溶接物２の突起２ａが電極
３，４の高耐熱性部材３ａ。As shown in FIG.
and 2 are overlapped and positioned, and the workpiece 1 is
, 2 is pressurized. At this time, the protrusion 2a of the object to be welded 2 is the highly heat-resistant member 3a of the electrodes 3 and 4.
４ａの位置に対応するように位置決めする。この状態で
電極３，４間に溶接電流を流すと、突起２ａと被溶接物
１との接触部分に電流が集中して発熱し、溶接ナゲツト
が形成される。このときナゲツトに最も近い高耐熱性部
材３ａ、４ａにより強く熱の影響が及ぶが、前述のよう
なセラミックス部材あるいは高融点金属部材からなる高
耐熱性部材３ａ、４ａの部分では被溶接物との溶着や熱
の影響によりヘタリがほとんど起きない。したがって電
極の寿命が大幅に延びる。Position it to correspond to position 4a. When a welding current is passed between the electrodes 3 and 4 in this state, the current concentrates at the contact portion between the protrusion 2a and the workpiece 1, generating heat and forming a weld nugget. At this time, the effect of heat is stronger on the high heat resistant members 3a and 4a that are closest to the nugget, but the high heat resistant members 3a and 4a, which are made of ceramic members or high melting point metal members as described above, are not connected to the workpiece. Almost no sagging occurs due to welding or heat effects. The life of the electrode is therefore significantly extended.
なお第３図には電極４における高耐熱性部材４ａの配置
の仕方の他の２つの例を示している。Note that FIG. 3 shows two other examples of how to arrange the highly heat-resistant member 4a in the electrode 4.
（発明の効果）
以上詳細に説明したように、この発明に係るプロジェク
ション溶接用電極は、被溶接物と接触する面の特に突起
に対応した部分のみを局部的に高耐熱性材料で構成した
ので、突起の部分から発生する高熱の影響を高耐熱性材
料の部分で主として受けるので、被溶接物との溶着や熱
による電極のへタリが起きにくくなり、電極の寿命が従
来より大幅に長くなる。(Effects of the Invention) As explained in detail above, the projection welding electrode according to the present invention is made up of a highly heat-resistant material locally only in the part corresponding to the protrusion on the surface that contacts the object to be welded. Since the high heat generated from the protrusions is mainly affected by the highly heat-resistant material, welding with the object to be welded and electrode fatigue due to heat are less likely to occur, and the life of the electrode is significantly longer than before. .
【図面の簡単な説明】
第１図は本発明の一実施例による電極と被溶接物の構成
を示す斜視図、第２図は同実施例における溶接時の断面
図、第３図は電極における高耐熱性部材の配置に関する
他の２つの例を示す斜視図である。
１．２・・・・・・・・・被溶接物 ２ａ・・・・・
・突起３．４・・・・・・・・・電極
３ａ、４ａ・・・高耐熱性部材
第
１
因
第２
図
（Ａ）
（Ｂ）
ａ[Brief Description of the Drawings] Fig. 1 is a perspective view showing the structure of an electrode and a workpiece according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same embodiment during welding, and Fig. 3 is a perspective view of the structure of an electrode and a welded object. It is a perspective view which shows two other examples regarding arrangement|positioning of a highly heat-resistant member. 1.2・・・・・・Workpiece to be welded 2a・・・・・・
・Protrusions 3.4... Electrodes 3a, 4a...High heat resistant member 1st cause 2nd figure (A) (B) a
Claims (3)
が形成される被溶接物の突起に対応する部分が他の部分
より高耐熱性の材料で構成され、前記他の部分が良導電
性の材料からなることを特徴とするプロジェクション溶
接用電極。(1) On the surface of the electrode that comes into pressure contact with the workpiece, the part corresponding to the protrusion of the workpiece where the nugget is formed is made of a material with higher heat resistance than other parts, and the other part has good conductivity. A projection welding electrode characterized by being made of a material.
記載のプロジェクション溶接用電極。(2) Claim 1, wherein the highly heat-resistant material is ceramics.
The projection welding electrode described.
ン等の高融点金属である請求項１記載のプロジェクショ
ン溶接用電極。(3) The projection welding electrode according to claim 1, wherein the highly heat-resistant material is a high melting point metal such as tungsten or molybdenum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2441290A JPH03230872A (en) | 1990-02-05 | 1990-02-05 | Projection welding electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2441290A JPH03230872A (en) | 1990-02-05 | 1990-02-05 | Projection welding electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03230872A true JPH03230872A (en) | 1991-10-14 |
Family
ID=12137445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2441290A Pending JPH03230872A (en) | 1990-02-05 | 1990-02-05 | Projection welding electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03230872A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611945A (en) * | 1993-10-08 | 1997-03-18 | Honda Giken Kogyo Kabushiki Kaisha | Resistance welding electrode |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242473A (en) * | 1987-03-31 | 1988-10-07 | Toshiba Corp | Projection welding method for metal plate |
| JPH01210180A (en) * | 1988-02-16 | 1989-08-23 | Nippon Steel Corp | Electrode for spot welding |
-
1990
- 1990-02-05 JP JP2441290A patent/JPH03230872A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242473A (en) * | 1987-03-31 | 1988-10-07 | Toshiba Corp | Projection welding method for metal plate |
| JPH01210180A (en) * | 1988-02-16 | 1989-08-23 | Nippon Steel Corp | Electrode for spot welding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611945A (en) * | 1993-10-08 | 1997-03-18 | Honda Giken Kogyo Kabushiki Kaisha | Resistance welding electrode |
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