JPS5823496Y2 - welding electrode - Google Patents

Description

【考案の詳細な説明】 本考案は衝合抵抗溶接用の電極に関し、特に板金を曲成
して環状体を製作する場合の衝合抵抗溶接に好適であり
、更には電極の変形、摩耗を少なくして、衝合溶接部に
おける段差の発生を防止することを特徴とした電極を提
案したものである。[Detailed description of the invention] The present invention relates to an electrode for butt resistance welding, and is particularly suitable for butt resistance welding when bending sheet metal to produce an annular body. The present invention proposes an electrode that is characterized by reducing the number of steps and preventing the occurrence of a step at the butt weld.

従来、板金により環状体を製作する場合においては、例
えば板金を所定の曲率半径で曲成して、その対向する端
面を衝合抵抗溶接によって溶着させており、第４図はそ
の衝合抵抗溶接を行なう状態を、環状体を正面視して示
したものである。Conventionally, when manufacturing an annular body using sheet metal, for example, the sheet metal is bent with a predetermined radius of curvature, and the opposing end faces are welded by butt resistance welding. Figure 4 shows the butt resistance welding process. The annular body is shown as viewed from the front.

第４図において、１は鋼板を所定の曲率半径で曲成し筒
状にした環状体であり、２，２は１対の溶接電極である
。In FIG. 4, numeral 1 is an annular body formed by bending a steel plate with a predetermined radius of curvature into a cylindrical shape, and numerals 2 and 2 are a pair of welding electrodes.

各溶接電極２，２は対向面側に、環状体１の外周面にお
ける衝合部Ａに近い部分に整合接触し得る湾曲面２ａ、
２ａを有しており、この湾曲面２ａ 、２ａを未溶接の
環状体１の衝合部Ａの両側においそ外周面に接触させ、
それ自体又は他の適宜の加圧手段により衝合せ端面同士
を加圧密着させた状態で、電極２，２に通電を行い、こ
れにより衝合部Ａに抵抗損による発熱を生ぜしめて溶接
を行い、この溶接によって環状体を完成するようにして
いる。Each welding electrode 2, 2 has a curved surface 2a on the opposing surface side that can be brought into alignment contact with a portion of the outer peripheral surface of the annular body 1 close to the abutting portion A;
2a, and the curved surfaces 2a, 2a are brought into contact with the outer circumferential surface of the unwelded annular body 1 on both sides of the abutment part A,
With the abutting end faces brought into close contact with each other under pressure by themselves or other suitable pressurizing means, electricity is applied to the electrodes 2, 2, thereby causing heat generation in the abutting portion A due to resistance loss and welding. , the annular body is completed by this welding.

ところが電極２，２は被溶接物である環状体１の外周面
に整合接触してダイバーンの発生を防止するようにその
対向先端部の肉厚が薄く形成されているうえに、一般に
銅製であり、環状体素材となる鋼材等よりも剛性が低く
、シかも抵抗損により発生する熱の影響を受け、環状体
１の溶接時には電極先端部が変形する。However, the electrodes 2, 2 are formed with a thin wall thickness at their opposing tips so as to come into consistent contact with the outer circumferential surface of the annular body 1, which is the object to be welded, and prevent the occurrence of diverging, and are generally made of copper. However, the rigidity is lower than that of steel, etc., which is the material of the annular body, and the tip of the electrode is deformed when the annular body 1 is welded due to the influence of heat generated by resistance loss.

このため第５図に示す如く衝合部Ａが溶接された後には
段差Ｂを生じることがあった。For this reason, as shown in FIG. 5, a step B may occur after the abutting portion A is welded.

更に、反復使用に伴い電極２，２が摩耗すると剛性が７
層低下し、著しい段差を生じる虞れがあるため、これを
未然に防止するには電極の保守点検をしばしば行う必要
があり、また電極寿命が比較的短いという欠点があった
。Furthermore, when the electrodes 2 and 2 are worn out due to repeated use, the rigidity decreases by 7.
There is a risk that the layer will drop and a significant level difference will occur, so in order to prevent this from happening, it is necessary to frequently perform maintenance and inspection of the electrode, and the electrode has the disadvantage that it has a relatively short lifespan.

本考案は前述した問題点に鑑み、剛性の低い銅系金属か
らなる電極本体と、剛性の高い鋼等からなり、被溶接物
である環状体を押圧把持する加圧治具とを並設させて、
前記電極本体には環状体の衝合部Ａに加えるための強い
加圧力を作用させないようにして、環状体に当接する電
極本体の湾曲面の変形や摩耗を低減し得るようにした溶
接電極を提供するものであり、以下に本考案をその実施
例を示す図面に基づいて説明する。In view of the above-mentioned problems, the present invention consists of an electrode body made of copper-based metal with low rigidity and a pressing jig made of high rigidity steel etc. that presses and grips the annular object to be welded. hand,
The electrode body is provided with a welding electrode that does not apply a strong pressing force to the abutting portion A of the annular body to reduce deformation and wear of the curved surface of the electrode body that comes into contact with the annular body. The present invention will be explained below based on the drawings showing the embodiments thereof.

第１図乃至第３図は夫々本考案に係る衝合抵抗溶接にお
ける溶接電極の分解斜視図、組立斜視図及び溶接時の状
態図である。1 to 3 are an exploded perspective view, an assembled perspective view, and a state diagram during welding of a welding electrode in butt resistance welding according to the present invention, respectively.

第３図において１０゜１０は１対の溶接電極であって、
各溶接電極１０は剛性の低い銅系の導電材料からなる。In Fig. 3, 10°10 is a pair of welding electrodes,
Each welding electrode 10 is made of a copper-based conductive material with low rigidity.

電極本体１１と、剛性の高い鋼材等からなっている加圧
治具１２とで構成されている。It is composed of an electrode body 11 and a pressing jig 12 made of a highly rigid steel material or the like.

電極本体１１の上端面及び加圧治具１２の下端面はいず
れも同一の幅寸法Ｃ１長さ寸法りを有して釦す、電極本
体１１の高さ寸法Ｅは加圧治具１２の高さ寸法Ｆに対し
て大幅に小さい。The upper end surface of the electrode body 11 and the lower end surface of the pressing jig 12 both have the same width dimension C1 and length dimension. It is significantly smaller than the dimension F.

そして電極本体１１の前面には、被溶接物である環状体
の外周面に整合接触し得る湾曲面１１ａが形成されてお
シ、幅方向の中央部分には適幅寸法で幅方向に対して直
角に位置する適長寸法の切欠部１１ｂを形成している。A curved surface 11a is formed on the front surface of the electrode body 11 so as to be in alignment contact with the outer peripheral surface of the annular body to be welded. A notch 11b of an appropriate length is formed at a right angle.

捷た電極本体１１の下部前面側は下方に適長延出してい
て係止部１１ｃを形成している。The lower front side of the twisted electrode main body 11 extends downward by an appropriate length to form a locking portion 11c.

一力、加圧治具１２には、電極本体１１に形成した湾曲
面１１ａと同一曲率半径であって、被溶接物の環状体１
の外周面に整合接触し得る湾曲面１２ａが形成されてい
る。First, the pressure jig 12 has the same radius of curvature as the curved surface 11a formed on the electrode body 11, and the annular body 1 of the workpiece
A curved surface 12a that can be brought into alignment contact with the outer circumferential surface of is formed.

また加圧治具１２の上部の湾曲面側における、加圧治具
１２の前面幅方向の中央部分には、電極本体１１に形成
した切欠部１１ｂの上端部の幅寸法及び長さ寸法よシ若
干短い幅寸法及び長さ寸法を有し、切欠部１１ｂに嵌入
させる係合突部１２ｂを形成しである。In addition, the width and length of the upper end portion of the notch 11b formed in the electrode body 11 are arranged at the center portion of the upper curved surface side of the pressurizing jig 12 in the front width direction of the pressurizing jig 12. An engaging protrusion 12b is formed which has a slightly shorter width and length and is fitted into the notch 11b.

加圧治具１２の湾曲面１２ａの上端部両側は垂直に切落
されて前記電極本体１１の係止部が接合される係止面１
２ｅ 、１２ｅが形成されている。Both sides of the upper end of the curved surface 12a of the pressing jig 12 are cut off vertically, and the locking surface 1 is joined to the locking portion of the electrode body 11.
2e and 12e are formed.

そしてこの係合突部１２ｂの高さ寸法は、加圧治具１２
の上部に電極本体１１を配設させたときに係合突部１２
ｂの上端部が電極本体１１の上端面より稍下方に位置す
るようにＥよりも短かく選定されている。The height dimension of this engaging protrusion 12b is determined by the pressure jig 12.
When the electrode main body 11 is disposed on the upper part of the engaging protrusion 12
It is selected to be shorter than E so that the upper end of b is located slightly below the upper end surface of the electrode main body 11.

この電極本体１１の切欠部１１ｂと加圧治具１２の係合
突部１２ｂとを係合させ、また係止部１１Ｃを係止面１
２ｃに接合することにより第２図に示す如く加圧治具１
２の上部に電極本体１１を配設して溶接電極１０を組立
て得、加圧治具１２に対する電極本体１１の移動を阻止
している。The notch 11b of the electrode body 11 and the engagement protrusion 12b of the pressing jig 12 are engaged, and the locking portion 11C is connected to the locking surface 1.
2c, the pressurizing jig 1 is assembled as shown in FIG.
The welding electrode 10 can be assembled by disposing the electrode body 11 on the upper part of the welding electrode 2, and the movement of the electrode body 11 with respect to the pressing jig 12 is prevented.

この電極本体１１と加圧治具１２とは電気的に絶縁させ
るのが好渣しく、両部材１１ ．１２が対接する部分に
は図示していない耐熱性絶縁部材を介在させるか、ある
いは絶縁コーティングを施している。It is preferable that the electrode body 11 and the pressing jig 12 be electrically insulated. A heat-resistant insulating member (not shown) is interposed between the portions 12 that are in contact with each other, or an insulating coating is applied thereto.

更に、必要により電極本体１１を貫通して加圧治具１２
に螺合する図示していないボルトにより両者を一体にさ
せても良い。Furthermore, if necessary, a pressurizing jig 12 is inserted through the electrode body 11.
The two may be integrated by a bolt (not shown) that is screwed into the two.

渣た電極本体１１にその部分のための通水路を設けてお
くこととしてもよい。A water passage for that part may be provided in the electrode main body 11 where the residue is left.

そして溶接電極１０が組立てられた状態では、同心的で
且つ同一曲率半径で形成されている電極本体１１及び加
圧治具１２の夫々の湾曲面１１ａ 、１２ａは同一面で
連接された状態となっている。When the welding electrode 10 is assembled, the curved surfaces 11a and 12a of the electrode body 11 and the pressure jig 12, which are concentric and formed with the same radius of curvature, are connected to each other on the same surface. ing.

而して、叙上の如く構成された溶接電極による衝合抵抗
溶接は第３図のようにして行なう。The butt resistance welding using the welding electrode constructed as described above is performed as shown in FIG.

前述した同寸同形状の溶接電極１０を２個用いて、夫夫
の湾曲面１２ａを適長間隔離隔させて対向して配設する
とともに、その対向させた湾曲面１２ａ。The two welding electrodes 10 having the same size and shape as described above are arranged to face each other with the curved surfaces 12a of the husband and husband separated by an appropriate length, and the curved surfaces 12a are opposed to each other.

１２ａ間に筒状に曲成して端面を対向させた、被溶接物
である環状体１を配置する。An annular body 1, which is an object to be welded and is curved into a cylindrical shape and has end faces facing each other, is placed between the annular bodies 12a.

続いて両溶接電極１０．１０の加圧治具１２，１２を互
いに接近させる方向に押圧してその状態を保持する。Subsequently, the pressing jigs 12, 12 of both welding electrodes 10.10 are pressed in a direction to bring them closer together and this state is maintained.

この押圧力は剛性の高い加圧治具１２の湾曲面１２ａに
より環状体１の外周面に作用させることができ、環状体
の対向する衝合せ端面を緊密に接合させることができる
。This pressing force can be applied to the outer peripheral surface of the annular body 1 by the curved surface 12a of the highly rigid pressing jig 12, and the opposing abutting end surfaces of the annular body can be tightly joined.

続いて、夫々の電極本体１１．１１の上端面にこれと一
体又は別体の上電極１３．１３を配置して、上電極１３
，１３から下向きの適宜圧力を加えて、電極本体ｉ１．
ｉｉと環状体１との電気的接触を確保し、図示しない溶
接電源からり−ド線３、上電極１３及び電極本体１１を
経て環状体１の衝合部Ａに溶接電流を通電して、環状体
１の衝合部Ａを溶着させる。Subsequently, an upper electrode 13.13 is placed on the upper end surface of each electrode body 11.11, either integrally or separately from the upper electrode 13.13.
, 13 to apply appropriate downward pressure to the electrode body i1.
ii and the annular body 1, and applying a welding current to the abutting portion A of the annular body 1 through the lead wire 3, the upper electrode 13, and the electrode body 11 from the welding power source (not shown), The abutting portion A of the annular body 1 is welded.

溶接を完了した環状体１は、対向している両溶接電極ｉ
ｏ、ｉｏを互いに離反させることにより押圧力を解放さ
せて取外す。The annular body 1, which has been welded, has both welding electrodes i facing each other.
By separating o and io from each other, the pressing force is released and removed.

その後続いてその位置に溶接させるべき環状体１を配置
して前記同様の順序で衝合抵抗溶接を行なう。Subsequently, the annular body 1 to be welded is placed at that position, and butt resistance welding is performed in the same order as described above.

叙上の如き本案品による場合は、電極本体１１゜１１自
体により衝合部Ａを密着的に接合させるための圧力を加
えないので、その摩耗が少なく、また若干の摩耗を生じ
てもこの電極本体１１．１１よりも剛性の高い、従って
耗、変形の少ない加圧治具１２，１２によって衝合さ
せるべき端面の位置出し及び加圧が行われることになり
、前述の如き段差Ｂが形成される虞れがなく、電極本体
１１ 、ｉｔには剛性が要求されず従来に比較して長期
の使用に耐え得る。In the case of this product as described above, since no pressure is applied to the abutting portion A by the electrode body 11 itself, there is little wear, and even if some wear occurs, this electrode The end surfaces to be brought into contact are positioned and pressed by the pressing jigs 12, 12, which have higher rigidity than the main body 11 and therefore have less wear and deformation, and the step B as described above is formed. There is no fear that the electrode body 11, it may be stiff, and it can withstand use for a longer period of time than in the past.

そして電極本体１１と加圧治具１２とを電気的に絶縁し
ておく場合は湾曲面１２ａを十分長く設計しても衝合部
Ａを経由しない電流は僅かしか流れず、溶接に支障を来
たすことがないことは勿論、衝合せるべき端面同士の位
置出しを高精度で行える。If the electrode body 11 and the pressing jig 12 are electrically insulated, even if the curved surface 12a is designed to be long enough, only a small amount of current will flow without passing through the abutment part A, which will cause problems in welding. Of course, the positioning of the end faces to be brought into contact with each other can be performed with high precision.

なお電極本体１１と加圧治具１２とを組合せた場合にお
いては係合突部１２ｂは電極本体１１の上端面から下方
へ退入位置しているので、上電極１３を電極本体１１の
上端面に接触させた状態でも係合突部１２ｂの上面に接
触することがなく、好都合である。Note that when the electrode body 11 and the pressing jig 12 are combined, the engagement protrusion 12b is retracted downward from the upper end surface of the electrode body 11, so the upper electrode 13 is moved from the upper end surface of the electrode body 11. Even when the engagement protrusion 12b is in contact with the upper surface of the engagement protrusion 12b, it does not come into contact with the upper surface of the engagement protrusion 12b, which is convenient.

なお電極本体１１は衝合部Ａ近傍に接触する部分につい
てみれば２分割されているどとになるが、そのために衝
合部Ａの中央部すなわち係合突部１２ｂに近接する部分
の抵抗損による発熱が低減されることにはならず、衝合
部Ａの全長に亘って均質な溶接が行えた。Note that the electrode main body 11 is divided into two parts when looking at the part that contacts the vicinity of the abutment part A, but because of this, the resistance loss in the central part of the abutment part A, that is, the part close to the engagement protrusion 12b. This did not result in a reduction in the heat generated by the welding process, and uniform welding could be performed over the entire length of the abutment part A.

そして円筒ころ軸受の環状保持器を本案品により製作す
る場合には、円筒ころを収納する窓の一つは衝合部の両
側に亘って形成されるのでこの窓の長さくころの軸長方
向寸法）と切欠部１１ａの幅寸法を一致させておくこと
とすると、所要の溶接部分、すなわち窓の両側に位置す
る保持器縁部に効率的に通電が行われるという利点もあ
る。When manufacturing an annular retainer for a cylindrical roller bearing using the proposed product, one of the windows for housing the cylindrical rollers is formed across both sides of the abutment part, so the length of this window is in the axial direction of the cylindrical rollers. If the width dimension of the notch portion 11a is made to match the width dimension of the cutout portion 11a, there is also the advantage that current can be efficiently applied to the required welded portions, that is, the edges of the cage located on both sides of the window.

なお上述の実施例では切欠部、係合突部を各１個設ける
こととしたが夫々２個以上としてもよいことは勿論であ
る。In the above-described embodiment, one cutout and one engagement protrusion are provided, but it goes without saying that two or more of each may be provided.

以上詳述したように本考案による場合は、衝合溶接部に
おける段差の発生を抑止し得、高品位の環状体を提供し
得る利点がある。As described in detail above, the present invention has the advantage of being able to suppress the occurrence of a step in the butt weld and providing a high-quality annular body.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、第２図、第３図は夫々本考案の実施例を示す溶
接電極の分解斜視図、組立斜視図、溶接状態図、第４図
は従来の溶接電極による溶接状態図、第５図は衝合溶接
された環状体斜視図である。 １・・・・・・環状体、１０・・・・・溶接電極、１１
・・・・・・電極本体、１１ｂ・・・・・・切欠部、１
１ｃ・・・・・孫止部、１２・・・・・・加圧治具、１
２ｂ・・・・・・係合突部、１２ｃ・・・・・孫止面。1, 2, and 3 are exploded perspective views, assembled perspective views, and welding state diagrams of welding electrodes showing embodiments of the present invention, respectively; FIG. 4 is welding state diagrams using conventional welding electrodes; The figure is a perspective view of a butt-welded annular body. 1... Annular body, 10... Welding electrode, 11
... Electrode body, 11b ... Notch, 1
1c... Sun stop part, 12... Pressure jig, 1
2b...Engaging protrusion, 12c...Sun stop surface.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] １．端面の衝合抵抗溶接により形成されるべき環状体の
溶接に用いる溶接電極において、前記環状体の外周面に
訃ける衝合せ端面近傍部分に整合接触する湾曲面を備え
、該湾曲面側には切欠部を形成してなる電極本体と、該
電極本体より剛性の高い素材からなり、前記切欠部に嵌
入する係合突部及び前記湾曲面に接触しない環状体外周
面部分に整合接触する湾曲面を備えた加圧治具とを具備
することを特徴とする溶接電極。 ２、前記電極本体及び加圧治具は電気的に絶縁されてい
る実用新案登録請求の範囲第１項記載の溶接電極。1. A welding electrode used for welding an annular body to be formed by abutting resistance welding of end faces, the annular body has a curved surface that aligns and contacts a portion near the abutting end face on the outer peripheral surface of the annular body, and a curved surface on the side of the curved face. an electrode body formed with a notch; an engaging protrusion that is made of a material more rigid than the electrode body and that fits into the notch; and a curved surface that aligns and contacts the outer peripheral surface portion of the annular body that does not contact the curved surface. A welding electrode comprising: a pressure jig having a pressure jig; 2. The welding electrode according to claim 1, wherein the electrode body and the pressing jig are electrically insulated.