JPS5910870B2 - Projection formation method for resistance welding - Google Patents
Projection formation method for resistance weldingInfo
- Publication number
- JPS5910870B2 JPS5910870B2 JP55167943A JP16794380A JPS5910870B2 JP S5910870 B2 JPS5910870 B2 JP S5910870B2 JP 55167943 A JP55167943 A JP 55167943A JP 16794380 A JP16794380 A JP 16794380A JP S5910870 B2 JPS5910870 B2 JP S5910870B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- projection
- resistance welding
- formation method
- projection formation
- 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
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
- B23K11/14—Projection welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Description
【発明の詳細な説明】
本発明は抵抗溶接のプロジェクション形成方法に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a projection forming method for resistance welding.
溶接材にプロジェクションを設けて行なう抵抗溶接は第
１図に示す如く、溶接材１および１’（■ｌ）一方又は
双方に小さな突起２を設け、電極３、３’＆こより押圧
しながら電流を流し、この突起部分２に電流と加圧力と
を集中することによつて溶接を行なう方法である。Resistance welding is performed by providing a projection on the welding material, as shown in Fig. 1, by providing a small protrusion 2 on one or both of the welding materials 1 and 1' (■l), and applying current while pressing from the electrodes 3, 3'& This is a method in which welding is performed by concentrating current and pressing force on the protruding portion 2.
この溶接方法は溶接すべき２枚の溶接材の板厚が異なる
場合に熱平衡をうるのが容易であること、電流と加圧力
が集中するのでバラツキの少ない優れた溶接が得られ、
また点溶接ではむずかしいような小さな溶接点を得るこ
とができること、溶接ピッチを小さくし構造上好ましい
位置に溶接点を配置することが可能で仕上りもきれいで
ある等の利点がある。しかしこのような溶接を行なう場
合、溶接部分にはかなり高い精度のプロジェクションを
設ける必要があり、従来このプロジェクションはプレス
機により打出し形成が行なわれていた。ところがプレス
機によりプロジエクシヨンの形成を行なう場合には型の
損耗があり、また打出しによつて溶接材に歪を生ずる欠
点がある。本発明はこの欠淑を改良するために案出され
たものである。このため本発明の抵抗溶接のプロジェク
ション形成方法においては、溶接材の所定の位置にレー
ザ光線を照射してその表面を溶融させたのち、冷却する
ことにより、溶融部の表面張力効果により突起が形成さ
れることを特徴とするものである。This welding method makes it easy to achieve thermal equilibrium when the two welding materials have different thicknesses, and because the current and pressure are concentrated, excellent welding with little variation can be achieved.
In addition, it has the advantage of being able to obtain small welding points that are difficult to achieve with spot welding, making it possible to reduce the welding pitch and placing the welding points at structurally preferable positions, and providing a clean finish. However, when such welding is performed, it is necessary to provide a projection of considerably high precision at the welded portion, and conventionally, this projection has been formed by punching using a press machine. However, when the projection is formed using a press machine, there are disadvantages in that the mold is worn out and the welded material is distorted by punching. The present invention has been devised to remedy this deficiency. Therefore, in the projection forming method for resistance welding of the present invention, a laser beam is irradiated to a predetermined position of the welding material to melt the surface, and then the surface is cooled to form a protrusion due to the surface tension effect of the molten part. It is characterized by being
以下添付図面に基づいて本発明方法を説明する。１５第
２図に本発明方法を実施しているところの断面図を示す
。The method of the present invention will be explained below based on the accompanying drawings. 15 FIG. 2 shows a cross-sectional view of the method of the present invention being carried out.
本発明方法は先ず溶接材４の表面の所定位置に白ぬき矢
印の如くレーザ光線５を照射し溶接材４の表面を溶融せ
しめる。次いで表面が溶融したならばレーザ光線５の照
射を停止する。しかるときは溶融部分はその熱を溶接材
４の未加熱部分に放散し急速に冷却される。その冷却途
中で溶融部分は表面張力の効果により中央部分が盛り上
り図に示す如きプロジェクション６が形成される。なお
レーザ装置に走査装置を付加することにより任意のピッ
チ、長さについてプロジェクションを形成することも可
能である。第３図は以上の如くにして得られたプロジェ
クションの１例をプロフィルメータにより測定した結果
を従来のプレス加工品と比較して示したものである。In the method of the present invention, first, a laser beam 5 is irradiated to a predetermined position on the surface of the welding material 4 as indicated by the white arrow to melt the surface of the welding material 4. Next, when the surface is melted, the irradiation of the laser beam 5 is stopped. In this case, the molten portion radiates its heat to the unheated portion of the welding material 4 and is rapidly cooled. During cooling, the center of the molten portion bulges due to the effect of surface tension, forming a projection 6 as shown in the figure. Note that by adding a scanning device to the laser device, it is also possible to form projections with arbitrary pitches and lengths. FIG. 3 shows the results of measuring an example of the projection obtained as described above using a profilometer, in comparison with a conventional press-formed product.
図は高さ方向の拡大倍率を２００倍、横方向の拡大倍率
を１００倍とし、曲線Ａにより本発明品を示し、曲線Ｂ
により従来品を示した。図より本発明方法によるプロジ
ェクション（曲線Ａ）は周囲に溝７が形成されているが
、これは従来のプレス加工においても特に形成する場合
があるように、溶接時においてプロジェクションが圧潰
する際に生じ易い溶接材間の隙間とか散りを防止するた
めに有効である。In the figure, the magnification in the height direction is 200 times and the magnification in the horizontal direction is 100 times. Curve A shows the product of the present invention, and curve B
shows the conventional product. As can be seen from the figure, grooves 7 are formed around the projection (curve A) according to the method of the present invention, but this occurs when the projection is crushed during welding, as is sometimes formed in conventional press working. This is effective for preventing gaps and splattering between welding materials, which can easily occur.
以上説明した如き本発明方法は次の如き利点を有する。The method of the present invention as explained above has the following advantages.
その第１はプロジエクシヨン成形用のプレス型を必要と
しないため型の摩耗を考慮する必要がないことである。
第２は溶接材に外力を加えずにプロジエクシヨン成形が
可能であるためプレス加工の如き高い内部応力の発生が
なく、従つて溶接後の高い溶接強度が期待できることで
ある。第３は溶接材が肉厚の場合でも微少なプロジエク
シヨンの形成が可能なことである。The first is that a press die for projection molding is not required, so there is no need to consider die wear.
Second, since projection forming can be performed without applying external force to the welded material, there is no generation of high internal stress unlike in press working, and therefore high welding strength after welding can be expected. Thirdly, even when the welding material is thick, it is possible to form minute projections.
第１図は従来のプロジエクシヨンを設けた抵抗溶接の説
明図、第２図は本発明にかかる抵抗溶接のプロジエクシ
ヨン形成方法の説明図、第３図は本発明方法により形成
されたプロジエクシヨンと従来方法により形成されたプ
ロジエクシヨンとの形状をプロフイルメータにより測定
した結果を示した線図である。
４・・・・・・溶接材、５・・・・・・レーザ光線、６
・・・・・・プロジエクシヨン。FIG. 1 is an explanatory diagram of resistance welding using a conventional projec- tion; FIG. 2 is an explanatory diagram of a method for forming a projec- tion in resistance welding according to the present invention; and FIG. FIG. 2 is a diagram showing the results of measuring the shapes of an excision and a progeexion formed by a conventional method using a profile meter. 4...Welding material, 5...Laser beam, 6
・・・・・・Projection.
Claims (1)
を溶融させたのち、冷却し、溶融部の表面張力効果によ
り突起が形成されることを特徴とする抵抗溶接のプロジ
ェクション形成方法。1. A projection forming method for resistance welding, characterized in that a laser beam is irradiated to a predetermined position of a welding material to melt the surface, and then the surface is cooled, and a protrusion is formed by the surface tension effect of the molten part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55167943A JPS5910870B2 (en) | 1980-12-01 | 1980-12-01 | Projection formation method for resistance welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55167943A JPS5910870B2 (en) | 1980-12-01 | 1980-12-01 | Projection formation method for resistance welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5791887A JPS5791887A (en) | 1982-06-08 |
| JPS5910870B2 true JPS5910870B2 (en) | 1984-03-12 |
Family
ID=15858919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55167943A Expired JPS5910870B2 (en) | 1980-12-01 | 1980-12-01 | Projection formation method for resistance welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910870B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61147185U (en) * | 1985-03-05 | 1986-09-10 | ||
| JPS6231965U (en) * | 1985-08-06 | 1987-02-25 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016102771A1 (en) * | 2016-02-17 | 2017-08-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for joining metallic workpieces and apparatus for joining |
-
1980
- 1980-12-01 JP JP55167943A patent/JPS5910870B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61147185U (en) * | 1985-03-05 | 1986-09-10 | ||
| JPS6231965U (en) * | 1985-08-06 | 1987-02-25 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5791887A (en) | 1982-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4927992A (en) | Energy beam casting of metal articles | |
| US4650954A (en) | Process for the butt-welding of especially deep-drawable steel sheets or steel strips galvanized at least on one side | |
| JP2005254282A (en) | Method for producing butt-welded metal plate by laser | |
| JP2799783B2 (en) | Manufacturing method of welded can body | |
| JPS5910870B2 (en) | Projection formation method for resistance welding | |
| US4211271A (en) | Continuous casting mold geometry improvement | |
| US2515589A (en) | Forging dies and manufacture thereof | |
| JPS60187491A (en) | Method and device for forming weakened wire to closure-cap and simulant by using laser-beam | |
| KR20200099606A (en) | Manufacturing method of three-dimensional sculpture | |
| JPH07290182A (en) | Press molding method and apparatus | |
| JPH09220639A (en) | Method for manufacturing laminated mold | |
| JP3048815B2 (en) | Method of processing tablet dividing line using laser beam | |
| JPH04157761A (en) | Cutting method for tie bar | |
| JPH03180287A (en) | Laser beam welding method | |
| JPH08215800A (en) | Amorphous metal ribbon | |
| JPS5949112B2 (en) | Laser welding method | |
| JPH04105721A (en) | Press forming method for metallic sheet | |
| JP3663628B2 (en) | Laser cladding method | |
| JPS62220293A (en) | Narrow groove laser beam welding method | |
| JPS5633192A (en) | Welding process for copper and copper alloy | |
| JPS61144249A (en) | Continuous casting method | |
| JP4477977B2 (en) | Method for producing Au-Sn alloy clad material | |
| KR900003081B1 (en) | Butt welding of dip-drawn steel sheets or strips galvanized on at least one side | |
| GB2033835A (en) | Process and apparatus for welding plastics sections | |
| JPH0710826Y2 (en) | Mold for casting |