JP2014151327A

JP2014151327A - Electrode tip regeneration tool and electrode tip regeneration process

Info

Publication number: JP2014151327A
Application number: JP2013020955A
Authority: JP
Inventors: Masanori Matsuoka; 政則松岡
Original assignee: TECHNO YAGYU CO Ltd; TNE KK; T and T KK
Current assignee: TECHNO YAGYU CO Ltd; TNE KK; T and T KK
Priority date: 2013-02-06
Filing date: 2013-02-06
Publication date: 2014-08-25

Abstract

PROBLEM TO BE SOLVED: To perform electric resistance-welding by growing a stable weld nugget by preventing an electrode tip from making contacts with a weld target material by preventing a skirt chip to be formed when performing press rolling during regeneration of the electrode tip, impressed current from shunting, and the contact pressure of the electrode tip on the weld target material from varying, and to enable the skirt chip to be cut away simultaneously with the shaping work of the electrode tip for effective work of regeneration.SOLUTION: Deformed parts are press-rolled to shape into normal shapes while making pressure-welding of the rolling parts (41, 43), (45, 47) of an electrode tip regeneration tip tool (23) relatively rotating with respect to the tip outer peripheral surface of electrode tips (15, 17), a press-rolling offcut formed along the outer periphery of the tip end side of the electrode tips (15, 17) when performing the above-mentioned press-rolling is removed by removal arms (49b, 51b).

Description

本発明は、電気抵抗溶接により変形した電極チップを初期の正規形状に整形して再生する電極チップ再生具及び電極チップ再生方法、詳しくは電極チップ先端部の押延ばしに伴って先端部基端側から電極チップの基端側に向かって外周面に沿った状態で突出する押延ばし残片（以下、本発明において押延ばし残片をスカート片と称する。）を切除して正規形状に整形するスカート片切削機能を備えた電極チップ再生具及び電極チップ再生方法に関する。 The present invention relates to an electrode tip regenerating tool and an electrode tip regenerating method for reshaping an electrode tip deformed by electric resistance welding into an initial normal shape, and more specifically, in accordance with the extension of the tip end of the electrode tip. A skirt piece cutting that cuts out a stretched remaining piece (hereinafter referred to as a skirt piece in the present invention) protruding in a state along the outer peripheral surface from the electrode tip toward the base end side of the electrode tip and shaping it into a regular shape. The present invention relates to an electrode chip regenerating tool having a function and an electrode chip regenerating method.

尚、本発明において「再生」とは、電極チップの変形部分を研磨したり、切削したりして正規形状に整形する研磨整形概念とは相違し、変形部分を先端側へ塑性変形させながら押延ばして正規形状に整形することを意味する。 In the present invention, “regeneration” is different from the polishing shaping concept in which the deformed portion of the electrode tip is polished or cut into a regular shape, and is pressed while plastically deforming the deformed portion toward the tip side. It means extending and shaping into a regular shape.

電気抵抗溶接時においては、一対の電極チップにより被溶接物を最適の圧力で挟持した状態で通電して高品質な溶接ナゲットを形成することにより溶接している。電気抵抗溶接に使用する電極チップにあっては、被溶接物に対する加圧により被溶接物に余分な傷が付くのを回避すると共に被溶接物に対して高圧電流を有効に導通させる必要から電気抵抗値が低くて柔らかい銅や銅合金等を使用している。 At the time of electric resistance welding, welding is performed by forming a high-quality weld nugget by energizing a workpiece with a pair of electrode tips held at an optimum pressure. In the case of electrode tips used for electric resistance welding, it is necessary to avoid excessive damage to the work piece due to pressurization of the work piece and to effectively conduct high voltage current to the work piece. The resistance value is low and soft copper or copper alloy is used.

しかし、銅や銅合金製の電極チップは、比較的容易に塑性変形し易く、被溶接物に対する加圧により先端部が押し潰されて変形して大径化したり、被溶接物に対する当接により磨耗したりして正規形状を保つことが困難であった。この結果、電極チップの先端面が磨耗して被溶接物への接触面積が大きくなり、被溶接物に対する抵抗値が変化して溶接ナゲットが不均一になり、溶接品質を低下させる。 However, electrode tips made of copper or copper alloy are relatively easy to plastically deform, and the tip is crushed and deformed by pressurizing the workpiece, resulting in a large diameter or contact with the workpiece. It was difficult to keep the regular shape due to wear. As a result, the tip surface of the electrode tip is worn to increase the contact area with the workpiece, the resistance value against the workpiece is changed, the welding nugget becomes non-uniform, and the welding quality is deteriorated.

例えば特許文献1に示すように、変形した電極チップを研磨して正規形状に整形する装置が知られているが、該装置にあっては、電極チップの変形部分を研磨除去して正規形状に整形するため、整形作業毎に電極チップ自体の長さが短くなって溶接寿命が短くなると共に電極チップの交換頻度が高くなり、溶接コストが増大する問題を有している。 For example, as shown in Patent Document 1, there is known an apparatus for polishing a deformed electrode tip to shape it into a regular shape. In this apparatus, the deformed portion of the electrode tip is removed by polishing to a normal shape. For shaping, there is a problem that the length of the electrode tip itself is shortened for each shaping work, the welding life is shortened, the frequency of replacing the electrode tip is increased, and the welding cost is increased.

本出願人は、上記欠点を解決するため、特許文献２に示す電極チップ再生具を提案した。該電極チップ再生具は、抵抗溶接用電極チップの少なくとも先端部とほぼ一致し、上部が開口したカップ状の整形室の内周面に、周方向へ不等間隔をおき、所要の高さで、開放端から底部へスパイラル曲線状に湾曲しながら延出し、かつ内周側から底部に至る頂部を、成形室の中心軸線に想定した所定位置からの曲率半径を順に大きくした湾曲面とした少なくとも３本の外周面圧延部を形成すると共に整形室の底部に、中心軸線から偏心した位置に中心を有し、軸線直交方向へ平面Ｓ字状に湾曲しながら延出し、電極チップの先端面に圧接する先端面圧延部を形成した構成からなる。 The present applicant has proposed an electrode chip regenerator shown in Patent Document 2 in order to solve the above-mentioned drawbacks. The electrode tip regenerator substantially coincides with at least the tip portion of the electrode tip for resistance welding, and is spaced at irregular intervals in the circumferential direction on the inner peripheral surface of the cup-shaped shaping chamber having an open top. , Extending from the open end to the bottom while curving in a spiral curve, and the top from the inner peripheral side to the bottom is a curved surface in which the radius of curvature from a predetermined position assumed as the central axis of the molding chamber is increased in order. Three outer peripheral surface rolling parts are formed and at the bottom of the shaping chamber, centered at a position eccentric from the central axis, extending in a plane S shape in the direction perpendicular to the axis, and extending to the tip surface of the electrode tip It consists of the structure which formed the front end surface rolling part which press-contacts.

そして電極チップの先端部外周面に対して回転するそれぞれの外周面成形突部を圧接しながら変形部分を先端側へ押延ばして正規形状に整形した後に回転する先端面圧延部により先端面側に押延ばされた変形部分を電極チップの先端面に盛付けて平面状に押延ばして正規形状に整形する。 Then, while pressing the outer peripheral surface forming protrusions rotating with respect to the outer peripheral surface of the tip of the electrode tip, the deformed portion is stretched to the front end side, shaped into a normal shape, and then rotated to the front surface side by the rotating front end surface rolling portion. The stretched deformed portion is stacked on the tip surface of the electrode chip and is flattened to be shaped into a normal shape.

しかし、特許文献２の電極チップ再生具により電極チップを再生するに際に、以下の問題を有していることが判明した。即ち、上記した電極チップ再生具の整形室内に進入した電極チップ先端側の変形部分に圧延部を圧接して押延ばしながら正規形状に整形すると、電極チップ１５・１７は図１１に示すように押延ばされた変形部分の一部が先端部基端側から電極チップ１５・１７の基端側外周面に沿って突出するスカート片１５ａ・１７ａに形成される。 However, it has been found that when the electrode chip is regenerated with the electrode chip regenerating tool of Patent Document 2, the following problems are encountered. In other words, when the rolled part is pressed into a deformed portion that has entered the shaping chamber of the electrode tip regenerator and pressed into a normal shape while being stretched, the electrode tips 15 and 17 are pushed as shown in FIG. A part of the extended deformed portion is formed on the skirt pieces 15a and 17a protruding from the proximal end side of the distal end portion along the proximal outer peripheral surface of the electrode tips 15 and 17.

先端部基端側の外周にスカート片１５ａ・１７ａが残ったままの電極チップ１５・１７により電気抵抗溶接を行うと、スカート片１５ａ・１７ａが被溶接材に干渉したり、電極チップ１５・１７に印加される電流が先端面以外のスカート片１５ａ・１７ａへ分流したり、スカート片１５ａ・１７ａの大きさによっては被溶接材に対する電極チップ１５・１７の圧接力が変化したりして安定した溶接ナゲットを育成して電気抵抗溶接できない恐れがある。 When electric resistance welding is performed using the electrode tips 15 and 17 with the skirt pieces 15a and 17a remaining on the outer periphery on the proximal end side of the distal end portion, the skirt pieces 15a and 17a may interfere with the material to be welded, Is applied to the skirt pieces 15a and 17a other than the tip surface, and depending on the size of the skirt pieces 15a and 17a, the pressure contact force of the electrode tips 15 and 17 with respect to the material to be welded may be stable. There is a risk that electric resistance welding cannot be performed by growing a welding nugget.

上記問題を解決するには、電極チップの整形作業後にスカート片を切削除去しなければならず、作業工程が増大すると共に作業時間が長くなって再生作業効率が悪くなる問題を有している。 In order to solve the above problem, the skirt piece must be cut and removed after the shaping operation of the electrode tip, which causes the problem that the number of working steps increases and the working time becomes long, resulting in poor regeneration work efficiency.

特開２０００-９４２１７号公報JP 2000-94217 A 特許第５１３１９２４号公報Japanese Patent No. 5131924

解決しようとする問題点は、電極チップ先端側の変形部分を押延ばしながら正規形状に整形する際に押延ばしに伴ってスカート片が形成され、該スカート片が被溶接材に干渉したり、電極チップに印加される電流が先端面以外のスカート片へ分流したり、スカート片の大きさによっては被溶接材に対する電極チップの圧接力が変化したりして安定した溶接ナゲットを育成して電気抵抗溶接できない点にある。電極チップの整形後にスカート片を切削除去する場合には、作業工程数が増大すると共に作業時間が長くなり、再生作業を効率的に行えない点にある。 The problem to be solved is that when the deformed portion on the tip side of the electrode tip is stretched and shaped into a regular shape, a skirt piece is formed along with the stretching, and the skirt piece interferes with the material to be welded, The electric current applied to the tip is shunted to the skirt piece other than the tip surface, and depending on the size of the skirt piece, the pressure contact force of the electrode tip against the material to be welded changes, and a stable welding nugget is nurtured to increase the electrical resistance. It is in the point which cannot be welded. When the skirt piece is cut and removed after shaping the electrode tip, the number of work steps increases and the work time becomes long, so that the regeneration work cannot be performed efficiently.

請求項１は、抵抗溶接用電極チップの変形先端部に対して圧延部を圧接して正規形状に整形する電極チップ再生具において、電極チップ再生具の開放端側における圧延部相互間に半径方向へ弾性変形可能で、圧延部に沿って垂下する切除アーム部を有した切除部材を設け、電極チップの先端部外周面に対して相対的に回転する電極チップ再生具の圧延部を圧接しながら変形部分を押延ばして正規形状に整形する際に、上記押延ばしに伴って電極チップの先端部基端側の外周に沿って形成される押延ばし残片を切除部材により切除可能にすることを最も主要な特徴とする。 Claim 1 is an electrode tip regenerator that presses a rolled portion against a deformed tip of a resistance welding electrode tip and shapes it into a regular shape, and in the radial direction between the rolled portions on the open end side of the electrode tip regenerator A cutting member having a cutting arm portion that can be elastically deformed and hangs along the rolling portion is provided, and the rolling portion of the electrode tip regenerating tool that rotates relative to the outer peripheral surface of the tip portion of the electrode tip is pressed against When the deformed portion is stretched and shaped into a regular shape, it is most preferable that the stretched residue formed along the outer periphery of the distal end portion of the electrode tip along with the stretching is cut by the cutting member. Main features.

請求項１０は、抵抗溶接用電極チップの変形先端部に対して圧延部を圧接して正規形状に整形する電極チップ再生方法において、電極チップの先端部外周面に対して相対的に回転する圧延部を圧接しながら変形部分を押延ばして正規形状に整形する際に、電極チップ再生具の開放端側における圧延部相互間に半径方向へ弾性変形可能で、圧延部に沿って垂下する切除アーム部を有した切除部材により上記押延ばしに伴って電極チップの先端部基端側の外周に沿って形成される押延ばし残片を切除することを最も主要な特徴とする。 [Claim 10] In the electrode tip regeneration method in which the rolled portion is pressed against the deformed tip portion of the resistance welding electrode tip and shaped into a normal shape, rolling that rotates relative to the outer peripheral surface of the tip portion of the electrode tip When the deformed part is stretched while being pressed against the part and shaped into a regular shape, the cutting arm can be elastically deformed in the radial direction between the rolling parts on the open end side of the electrode tip regenerator and hangs down along the rolling part The main feature is to cut off the extended residual piece formed along the outer periphery of the proximal end side of the distal end portion of the electrode tip with the extension by the cutting member having a portion.

本発明は、電極チップの再生時に押延ばしに伴ってスカート片が形成されるのを防止して被溶接材に接触したり、印加される電流が分流したり、被溶接材に対する電極チップの圧接力が変化したりするのを防止して安定した溶接ナゲットを育成して電気抵抗溶接することができる。電極チップの整形作業と同時にスカート片を切削除去することができ、再生作業を効率的に行うことができる。 The present invention prevents the formation of a skirt piece along with the extension during the regeneration of the electrode tip to contact the workpiece, to shunt the applied current, or to press the electrode tip against the workpiece. It is possible to grow a stable welding nugget while preventing the force from changing, and to perform electric resistance welding. Simultaneously with the shaping operation of the electrode tip, the skirt piece can be removed by cutting, and the regeneration operation can be performed efficiently.

抵抗溶接用電極チップが取付けられる溶接ガン及び電極チップ再生装置の概略を示す斜視図である。It is a perspective view which shows the outline of the welding gun and electrode tip reproduction | regeneration apparatus to which the electrode tip for resistance welding is attached. 電極チップ再生装置における電極チップ再生具の固定状態を示す分解説明図である。It is decomposition | disassembly explanatory drawing which shows the fixed state of the electrode tip reproduction | regeneration tool in an electrode tip reproduction | regeneration apparatus. 電極チップ再生具の概略を示す斜視図である。It is a perspective view which shows the outline of an electrode chip | tip reproduction | regeneration tool. 図３におけるＡ−Ａ線縦断面図である。It is the AA line longitudinal cross-sectional view in FIG. 電極チップ再生具の平面図である。It is a top view of an electrode tip regeneration tool. 電極チップ再生具に切除部材を固定した状態を示す断面説明図である。It is sectional explanatory drawing which shows the state which fixed the cutting member to the electrode chip | tip reproduction | regeneration tool. 変形した電極チップを示す説明図である。It is explanatory drawing which shows the electrode tip which deform | transformed. 電極チップ先端部の整形状態を示す説明図である。It is explanatory drawing which shows the shaping state of an electrode tip front-end | tip part. 電極チップ先端面の整形状態を示す説明図である。It is explanatory drawing which shows the shaping state of an electrode tip front end surface. 切除部材による切削状態を示す説明図である。It is explanatory drawing which shows the cutting state by a cutting member. 電極チップにおける先端部基端側のスカート片が形成された状態を示す説明図である。It is explanatory drawing which shows the state in which the skirt piece of the front-end | tip part base end side in the electrode tip was formed.

電極チップの先端部外周面に対して相対的に回転する電極チップ再生具の圧延部を圧接しながら変形部分を押延ばして正規形状に整形する際に、上記押延ばしに伴って電極チップの先端部基端側の外周に沿って形成される押延ばし残片を切除部材により切除可能にすることを最適の形態とする。 When the deformed portion is stretched and shaped into a normal shape while pressing the rolled portion of the electrode tip regenerator that rotates relative to the outer peripheral surface of the tip portion of the electrode tip, the tip of the electrode tip is accompanied with the above-mentioned extension. It is an optimum embodiment to make it possible to cut the stretched remaining piece formed along the outer periphery on the base end side by the cutting member.

以下に実施形態を示す図に従って本発明を説明する。
図１及び図２に示すように、例えば多関節型抵抗溶接機のアーム（何れも図示せず）先端部には溶接ガン１が取付けられる。溶接ガン１のフレーム３には一対の取付けアーム５・７が適宜の間隔をおいて相対して移動可能に設けられる。そして各取付けアーム５・７には、先端部に電極チップ１５・１７が交換可能にそれぞれ取付けられる取付け軸１１・１３が軸線を一致させて相対するように設けられている。 The present invention will be described below with reference to the drawings showing embodiments.
As shown in FIGS. 1 and 2, for example, a welding gun 1 is attached to the tip of an arm (neither shown) of an articulated resistance welder. A pair of mounting arms 5 and 7 are provided on the frame 3 of the welding gun 1 so as to be movable relative to each other at an appropriate interval. The mounting arms 5 and 7 are respectively provided with mounting shafts 11 and 13 to which the electrode tips 15 and 17 are mounted so as to be exchangeable at the tip portions so that their axes are aligned.

これら電極チップ１５・１７は、例えば一方の取付けアーム５／７に連結された図示しないエアーシリンダーや送りネジ機構に設けたサーボモータ等の作動部材により、互いに近づく方向及び遠ざかる方向へ移動される。各電極チップ１５・１７は電気抵抗が低く、塑性変形し易い銅や銅合金等で、所要の軸線長さで、先端部外周が所要の外形で、先端に向かって徐々に小径化して先端面がほぼ平面に形成される。尚、抵抗溶接機としては、上記多関節型溶接機の他に、従来公知のスタンド型抵抗溶接機であってもよいことは、勿論である。 These electrode tips 15 and 17 are moved in a direction toward and away from each other by an operating member such as an air cylinder (not shown) connected to one mounting arm 5/7 or a servo motor provided in a feed screw mechanism. Each of the electrode tips 15 and 17 is made of copper, copper alloy or the like having a low electric resistance and being easily plastically deformed, having a required axial length, a distal end outer periphery having a required outer shape, and gradually reducing the diameter toward the distal end. Are formed substantially in a plane. Of course, the resistance welder may be a conventionally known stand-type resistance welder in addition to the articulated welder.

例えば溶接ガン１の移動原点位置（待機位置）には電極チップ再生装置２１が配置される。該電極チップ再生装置２１は移動原点位置に移動した溶接ガン１の電極チップ１５・１７を、正規形状に整形して再生する。該電極チップ再生装置２１は、移動原点位置に移動した電極チップ１５・１７の中心軸線に一致する軸線を有して回転可能に支持される電極チップ再生具２３と、中心部に電極チップ再生具２３が回り止めされて挿嵌される装着孔２５ａが設けられると共に電動モータ２７が連結されて回転駆動される回転盤２５と、回転盤２５に対して装着孔２５ａに挿嵌された電極チップ再生具２３をねじ止め固定する一対の固定盤２９により構成される。 For example, the electrode tip regeneration device 21 is arranged at the movement origin position (standby position) of the welding gun 1. The electrode tip regenerator 21 shapes and regenerates the electrode tips 15 and 17 of the welding gun 1 moved to the movement origin position into a regular shape. The electrode chip regenerator 21 includes an electrode chip regenerator 23 that is rotatably supported with an axis that coincides with the center axis of the electrode chips 15 and 17 moved to the movement origin position, and an electrode chip regenerator at the center. The mounting plate 25 is provided with a mounting hole 25a in which the rotation stop 23 is prevented and inserted, and the electric motor 27 is connected to the rotating plate 25 to be driven to rotate, and the electrode chip inserted into the mounting hole 25a with respect to the rotating plate 25 is regenerated. It comprises a pair of fixed plates 29 for fixing the tool 23 with screws.

次に、上記電極チップ再生具２３を説明する。
図３乃至図６に示すように、電極チップ再生具２３は、超硬合金（高速度鋼）やセラミックス等からなり、本実施例においては六角柱形状に形成される。そして電極チップ再生具２３の下部及び上部には、進入する電極チップ１５・１７を正規の形状に整形する整形室３１・３３が対称に形成される。 Next, the electrode tip regenerator 23 will be described.
As shown in FIGS. 3 to 6, the electrode tip regenerator 23 is made of cemented carbide (high speed steel), ceramics, or the like, and is formed in a hexagonal column shape in this embodiment. In the lower and upper portions of the electrode tip regenerator 23, shaping chambers 31 and 33 for shaping the entering electrode tips 15 and 17 into regular shapes are formed symmetrically.

各整形室３１・３３は電極チップ１５・１７の先端部側が進入可能な大きさのカップ状に形成される。そして各整形室３１・３３の外周側には、底部３１・３３を連通して軸線方向へ延びる複数個の逃し穴３５（図示の例は、３個の場合を示す。）が周方向へほぼ等しい間隔をおいて形成される。 The shaping chambers 31 and 33 are formed in a cup shape having a size that allows the front ends of the electrode tips 15 and 17 to enter. A plurality of relief holes 35 (in the example shown in the figure, three cases are shown) extending in the axial direction through the bottom portions 31 and 33 are provided substantially in the circumferential direction on the outer peripheral side of the respective shaping chambers 31 and 33. Formed at equal intervals.

各逃し孔３５間に位置する整形室３１・３３の内周面には電極チップ１５・１７における先端部外周面の変形部分に圧接して先端面側へ押延ばす圧延部の一部を構成する３個の外周面圧延部４１、４３が底部３７・３９に至るように形成される。各外周面圧延部４１、４３は、整形室３１・３３における内周面の周方向に対して異なる間隔をおいて設けられる。 The inner peripheral surfaces of the shaping chambers 31 and 33 located between the escape holes 35 constitute a part of a rolling portion that presses against the deformed portion of the outer peripheral surface of the tip portion of the electrode tips 15 and 17 and extends toward the tip surface side. Three outer peripheral surface rolling portions 41 and 43 are formed to reach the bottom portions 37 and 39. The outer peripheral surface rolling portions 41 and 43 are provided at different intervals with respect to the circumferential direction of the inner peripheral surface in the shaping chambers 31 and 33.

各外周面圧延部４１，４３は、整形室３１・３３の内側へ所要の高さで突出し、電極チップ再生具２３の回転方向に湾曲して形成される。また、各外周面圧延部４１，４３における内周面から底部３７・３９に至る湾曲面は、整形室３１・３３の中心軸線上に想定される中心点からの曲率半径が電極チップ再生具２３の回転方向下手から上手に向かって順に大きくなるように設定される。 Each of the outer peripheral surface rolling portions 41, 43 protrudes to the inside of the shaping chambers 31, 33 at a required height, and is formed to be curved in the rotation direction of the electrode tip regenerator 23. Further, the curved surfaces extending from the inner peripheral surface to the bottom portions 37 and 39 in the respective outer peripheral surface rolling portions 41 and 43 have a radius of curvature from the center point assumed on the central axis of the shaping chambers 31 and 33. The rotation direction is set so as to increase in order from lower to upper.

その内の回転方向上手に位置する各外周面圧延部４１，４３における頂部の曲率半径は正規形状に整形された電極チップ１５・１７における先端部の曲率半径に一致するように設定される。更に、各外周面圧延部４１，４３は回転方向に対する頂部幅が、開放端から底部３７・３９に向かって徐々に狭くなるように設定される。 The curvature radius of the top part in each outer peripheral surface rolling part 41 and 43 located in the rotation direction in the inside is set so that it may correspond with the curvature radius of the front-end | tip part in the electrode tips 15 * 17 shape | molded by normal shape. Furthermore, each outer peripheral surface rolling part 41 and 43 is set so that the top width with respect to the rotation direction becomes gradually narrower from the open end toward the bottom parts 37 and 39.

各底部３７・３９には、電極チップ１５・１７の先端面に圧接して押延ばす圧延部の一部を構成する先端面圧延部４５・４７がそれぞれ形成される。各先端面圧延部４５・４７は電極チップ再生具２３の中心軸線から若干偏心した位置に中心を有し、所要の高さで電極チップ１５・１７の先端面幅より若干長く、平面がＳ字形に形成される。また、先端面圧延部４５・４７の長手直交方向両側に応じた底部３７・３９には対応する箇所の逃し穴３５に連続する凹部（図示せず）が形成される。 The bottom portions 37 and 39 are respectively formed with end surface rolling portions 45 and 47 that constitute a part of the rolling portion that presses and extends to the end surfaces of the electrode tips 15 and 17. Each of the end face rolling portions 45 and 47 has a center at a position slightly decentered from the center axis of the electrode tip regenerator 23, is slightly longer than the tip end face width of the electrode tips 15 and 17 at a required height, and the plane is S-shaped. Formed. Moreover, the bottom part 37 * 39 according to the longitudinal orthogonal direction both sides of the front end surface rolling parts 45 * 47 is formed with a recess (not shown) continuous to the corresponding relief hole 35.

尚、図は先端面圧延部４５・４７の頂面を軸線直交方向に対して直線状の平面とする例を示すが、軸線直交方向に対して凸状または凹状の湾曲面としてもよい。 In addition, although a figure shows the example which makes the top surface of the front end surface rolling parts 45 and 47 a linear plane with respect to an axis orthogonal direction, it is good also as a convex or concave curved surface with respect to an axis orthogonal direction.

各外周面圧延部４１、４３の相互間で、逃し孔３５に応じた電極チップ再生具２３の開放側上端面及び下端面には切除部材４９・５１の固定アーム部４９ａ・５１ａを係止する凹部２３ａ・２３ｂがそれぞれ設けられる。各凹部２３ａ・２３ｂは上記固定アーム部４９ａ・５１ａの板厚より浅い深さに形成され、装着孔２５ａに挿嵌された電極チップ再生具２３を回転盤２５に固定するための固定盤２９が回転盤２５にねじ止めした際に、上記回転盤２５との協働により固定アーム部４９ａ・５１ａを挟持して切除部材４９・５１をそれぞれ固定させる。 The fixed arm portions 49a and 51a of the cutting members 49 and 51 are engaged with the open side upper and lower surfaces of the electrode tip regenerator 23 corresponding to the escape holes 35 between the outer peripheral surface rolling portions 41 and 43, respectively. Recesses 23a and 23b are respectively provided. The recesses 23a and 23b are formed at a depth shallower than the plate thickness of the fixed arm portions 49a and 51a, and a fixing plate 29 for fixing the electrode chip regenerator 23 inserted into the mounting hole 25a to the rotating plate 25 is provided. When screwed to the turntable 25, the cutting members 49 and 51 are fixed by sandwiching the fixed arm portions 49a and 51a in cooperation with the turntable 25, respectively.

上記切除部材４９・５１は一方端部に上記固定アーム部４９ａ・５１ａが、また他方端部に切除アーム部４９ｂ・５１ｂを有した弾性変形可能な金属材により形成される。上記固定アーム部４９ａ・５１ａは上記したように電極チップ再生具２３における凹部２３ａ・２３ｂの深さより厚い板厚で係止するように形成される。 The cutting members 49 and 51 are formed of an elastically deformable metal material having the fixed arm portions 49a and 51a at one end and the cutting arm portions 49b and 51b at the other end. As described above, the fixed arm portions 49a and 51a are formed so as to be locked with a plate thickness that is thicker than the depth of the recesses 23a and 23b in the electrode tip regenerator 23.

また、上記切除部材４９・５１の切除アーム部４９ｂ・５１ｂは上記固定アーム部４９ａ・５１ａの先端部に対して外周面圧延部４１、４３の上部（下部）に至る長さで、該外周面圧延部４１、４３の上部（下部）に沿って傾斜するように折曲形成される。該切除アーム部４９ｂ・５１ｂの幅方向の中央部には長手方向へ延出する開口部４９ｃ・５１ｃが形成され、該開口部４９ｃ・５１ｃを挟んだ切除アーム部４９ｂ・５１ｂの長手方向端縁により刃物を形成している。 Further, the cutting arm portions 49b and 51b of the cutting members 49 and 51 are long enough to reach the upper portions (lower portions) of the outer peripheral surface rolling portions 41 and 43 with respect to the distal end portions of the fixed arm portions 49a and 51a. It bends so that it may incline along the upper part (lower part) of the rolling parts 41 and 43. FIG. Opening portions 49c and 51c extending in the longitudinal direction are formed in the central portion of the cutting arm portions 49b and 51b in the width direction, and the longitudinal edges of the cutting arm portions 49b and 51b sandwiching the opening portions 49c and 51c The blade is formed by.

次に、上記のように構成される電極チップ再生具２３による電極チップ１５・１７の再生作用及び再生方法を説明する。尚、説明の便宜上、図８乃至図１０は上方に位置する整形室３１による電極チップ１５の再生作用及び切除作用を図示するが、下方の整形室３３による電極チップ１７の再生作用に付いても同様であるため、図示を省略する。 Next, the regenerating action and the regenerating method of the electrode tips 15 and 17 by the electrode tip regenerating tool 23 configured as described above will be described. For convenience of explanation, FIGS. 8 to 10 illustrate the regenerating action and resecting action of the electrode tip 15 by the upper shaping chamber 31, but the regenerating action of the electrode tip 17 by the lower shaping chamber 33 is also shown. Since it is the same, illustration is abbreviate | omitted.

抵抗溶接機の溶接ガン１に装着される電極チップ１５・１７は、図７に示すように、溶接作業に伴って被溶接物に対する圧接により電極チップ１５・１７の先端部が押し潰されて大径化したり、先端面が、被溶接物に対する圧接により磨耗したり、通電時の発熱による溶融したりして変形している。なお、図７においては電極チップ１５・１７の先端部が押し潰されて大径化すると共に先端面の一部が磨耗した状態を実線で、また正規形状を一点鎖線で示す。 As shown in FIG. 7, the electrode tips 15, 17 attached to the welding gun 1 of the resistance welder are large in size because the tip portions of the electrode tips 15, 17 are crushed by pressure contact with the work to be welded. The diameter is changed, the tip surface is worn due to pressure contact with the workpiece, or is melted due to heat generated during energization. In FIG. 7, the tip portions of the electrode tips 15 and 17 are crushed to increase the diameter and a part of the tip surface is worn by a solid line, and the normal shape is indicated by a one-dot chain line.

上記のように変形した電極チップ１５・１７は、被溶接物に対する接触面積を一定にして圧接力を均一にすることができず、均質な溶接ナゲットを形成して溶接することができない。このため、電極チップ１５・１７の先端部が変形した場合には図７に一点鎖線で示す正規形状に整形する必要がある。 The electrode tips 15 and 17 deformed as described above cannot make the pressure contact force uniform with a constant contact area with respect to the workpiece, and cannot form and weld a uniform weld nugget. For this reason, when the tip portions of the electrode tips 15 and 17 are deformed, it is necessary to shape them into a regular shape indicated by a one-dot chain line in FIG.

電極チップ１５・１７の整形作業は、例えば溶接回数が所定回数に達したとき、１個の被溶接物に対する複数ショットの溶接作業が終了したとき、所要個数の被溶接物の溶接作業が終了したとき、或いは次の被溶接物が所要の溶接位置に搬入されるまでの間、溶接ガン１を移動原点位置に戻して待機している間に行われる。 For example, when the number of times of welding reaches a predetermined number of times, when a plurality of shots are welded to one workpiece, the welding operation of the required number of workpieces is completed. Or until the next workpiece is carried into the required welding position while the welding gun 1 is returned to the moving origin position and is on standby.

即ち、電動モータ２７に駆動により回転する電極チップ再生具２３の各整形室２７・２９内に対して電極チップ１５・１７を互いに近づく方向へ移動して進入させると、電極チップ１５・１７における先端部の変形部分に回転する外周面圧延部４１・４３が圧接し、上記変形部分の一部を先端面側へ、また一部を先端部基端側に向かうように押延ばして整形する。（図８参照） That is, when the electrode tips 15 and 17 are moved in the directions approaching each other into the shaping chambers 27 and 29 of the electrode tip regenerator 23 that is rotated by driving to the electric motor 27, the tips of the electrode tips 15 and 17 are moved forward. The outer peripheral surface rolling parts 41 and 43 are in pressure contact with the deformed part of the part, and are shaped by extending a part of the deformed part toward the distal end surface and a part toward the proximal end side of the distal end. (See Figure 8)

このとき、変形部分に圧接する外周面圧延部４１・４３の内周面から底部３７・３９に至る各頂部の曲率半径が順に大きくなる湾曲面に形成されているため、電極チップ１５・１７の先端部外周面に対してそれぞれの外周面圧延部４１・４３が個別に圧接することにより圧接抵抗を低減して電極チップ再生具２３の回転不良を防止する。 At this time, since the curvature radius of each top part from the inner peripheral surface of the outer peripheral surface rolling parts 41 and 43 that press-contact the deformed part to the bottom parts 37 and 39 is formed in a curved surface, the electrode chips 15 and 17 The outer peripheral surface rolling portions 41 and 43 are individually pressed against the outer peripheral surface of the tip portion, thereby reducing the press resistance and preventing the rotation failure of the electrode tip regenerator 23.

また、各外周面圧延部４１・４３が回転方向に対して不等間隔に設けられるため、変形部分に対してそれぞれの外周面圧延部４１・４３が一定の周期的に圧接することにより発生する振動を低減させる。 Moreover, since each outer peripheral surface rolling part 41 * 43 is provided in an irregular space | interval with respect to a rotation direction, it generate | occur | produces when each outer peripheral surface rolling part 41 * 43 presses against a deformation | transformation part by fixed periodicity. Reduce vibration.

そして各外周面圧延部４１・４３により電極チップ１５・１７の先端面側へ押延ばされた変形部分は先端面において凹凸状になるが、電極チップ１５・１７における先端面に回転しながら圧接する先端面圧延部４４５・４７により凹凸部を押延ばして平面状に整形する。（図９参照） The deformed portion extended to the tip surface side of the electrode tips 15 and 17 by the outer peripheral surface rolling portions 41 and 43 becomes uneven on the tip surface, but is pressed against the tip surface of the electrode tips 15 and 17 while rotating. The concavo-convex portions are stretched by the tip end surface rolling portions 445 and 47 to be shaped into a flat shape. (See Figure 9)

このとき、先端面圧延部４５・４７が平面Ｓ字状に形成されているため、先端面の凸部に対して効率的に圧接して押延ばして平面状に整形することができる。また、先端面圧延部４１・４３が電極チップ再生具２３の中心軸線から若干偏心しているため、電極チップ１５・１７先端面に対して先端面圧延部４１・４３の周速が零になる箇所において突部（所謂へそと称する突部）が形成されるのを防止して先端面全体を平面状に整形する。 At this time, since the front end face rolling portions 45 and 47 are formed in a flat S-shape, the front end face rolling portions 45 and 47 can be efficiently pressed against and extended to the convex portion of the front end face and shaped into a flat shape. Further, the tip surface rolling portions 41 and 43 are slightly decentered from the center axis of the electrode tip regenerator 23, so that the peripheral speed of the tip surface rolling portions 41 and 43 becomes zero with respect to the tip surfaces of the electrode tips 15 and 17 In FIG. 5, the formation of a protrusion (a so-called navel protrusion) is prevented, and the entire tip surface is shaped into a flat shape.

一方、各外周面圧延部４１・４３により電極チップ１５・１７の先端部基端側へ押延ばされた一部の変形部分は図１１に示すように先端部基端側の外周面に沿って電極チップ１５・１７の基端側に向かって突出するスカート片１５ａ・１７ａに形成される。本例においては、電極チップ１５・１７の先端部基端側に形成されたスカート片１５ａ・１７ａを、弾性変形しながら電極チップ１５・１７の先端部基端側外周面に圧接する切除アーム部４９ｂ・５１ｂの刃物により切削して除去する。なお、切削屑は、逃し穴３５を介して外部へ排出される。（図１０参照） On the other hand, as shown in FIG. 11, a part of the deformed portion extended to the proximal end side of the distal end portion of the electrode tips 15 and 17 by the outer peripheral surface rolling portions 41 and 43 extends along the outer peripheral surface of the distal end proximal end side. Are formed on the skirt pieces 15a and 17a projecting toward the base ends of the electrode tips 15 and 17. In this example, the cutting arm portion that presses the skirt pieces 15a and 17a formed on the proximal end side of the distal end portion of the electrode tips 15 and 17 to the outer peripheral surface of the distal end proximal end side of the electrode tip 15 and 17 while being elastically deformed. It cuts and removes with the blade of 49b * 51b. The cutting waste is discharged to the outside through the escape hole 35. (See Figure 10)

このとき、切除アーム部４９ｂ・５１ｂは、スカート片１５ａ・１７ａを開口部４９ｃ・５１ｃ幅に応じた厚さで切削するため、該スカート片１５ａ・１７ａが過度に切削されることにより発生する電極チップ再生具２３の回転不良を防止する。 At this time, since the cutting arm portions 49b and 51b cut the skirt pieces 15a and 17a with a thickness corresponding to the width of the opening portions 49c and 51c, the electrodes generated when the skirt pieces 15a and 17a are excessively cut. The rotation failure of the chip regenerator 23 is prevented.

また、電極チップ１５・１７の先端部基端側に形成されるスカート片１５ａ・１７ａは、半径方向に対する膨出の度合いが一様でなく、膨出部分を含む電極チップ１５・１７における先端部基端側の外径が部分的に異なるが、固定アーム部４９ａ・５１ａに対して切除アーム部４９ｂ・５１ｂがスカート片１５ａ・１７ａに応じて弾性変形しながら圧接して切除する。 Further, the skirt pieces 15a and 17a formed on the proximal end side of the distal end portions of the electrode tips 15 and 17 are not uniformly bulged in the radial direction, and the distal end portions of the electrode tips 15 and 17 including the bulged portions are included. Although the outer diameter on the proximal end side is partially different, the cutting arm portions 49b and 51b are pressed against the fixed arm portions 49a and 51a while being elastically deformed according to the skirt pieces 15a and 17a.

上記固定アーム部４９ａ・５１ａに対して切除アーム部４９ｂ・５１ｂが外周面圧延部４１、４３の上部（下部）に至る長さで、該外周面圧延部４１、４３の上部（下部）に沿って傾斜するように折曲されているため、電極チップ１５・１７における先端部基端側外周面の膨出部分が切除された際には、電極チップ１５・１７における先端部基端側外周面に対して切除アーム部４９ｂ・５１ｂが圧接しなくなって切削されるのを回避している。 The cutting arm portions 49b and 51b reach the upper portions (lower portions) of the outer peripheral surface rolling portions 41 and 43 with respect to the fixed arm portions 49a and 51a, and extend along the upper portions (lower portions) of the outer peripheral surface rolling portions 41 and 43. Therefore, when the bulging portion of the distal end proximal end outer peripheral surface of the electrode tips 15 and 17 is cut off, the distal end proximal end outer peripheral surface of the electrode tips 15 and 17 is removed. On the other hand, the cutting arm portions 49b and 51b are prevented from being pressed and cut.

尚、電極チップ１５・１７の先端部には、溶接作業時に異物が付着したり、通電時の熱により被溶接物から溶融蒸発したりして金属の酸化合金膜が形成される。特に酸化合金膜にあっては、電極チップ１５・１７の材質より硬度が高いため、上記した電極チップ１５・１７を再生する際に障害になる恐れがある。このため、電極チップ１５・１７の再生作業に先立って、その先端部外周面及び先端面に対して上記した回転する外周面圧延部４１・４３及び先端面圧延部４５・４７をそれぞれ圧接して付着した異物や酸化合金膜を削り取って逃し孔３５等を介して外部へ排出することにより再生作業を効率的に行う。 A metal oxide alloy film is formed on the tip portions of the electrode tips 15 and 17 by foreign matters adhering during welding work or by melting and evaporating from an object to be welded by heat during energization. In particular, the oxide alloy film has a higher hardness than the material of the electrode tips 15 and 17, which may cause an obstacle when the electrode tips 15 and 17 are regenerated. For this reason, prior to the regenerating work of the electrode tips 15 and 17, the outer peripheral surface of the tip and the outer peripheral surface rolling parts 41 and 43 and the tip surface rolling parts 45 and 47 described above are pressed against the front and rear surfaces, respectively. The adhering foreign matter and oxide alloy film are scraped off and discharged to the outside through the escape holes 35 and the like, so that the regeneration work is efficiently performed.

本実施例は、被溶接材に対する圧接により変形した電極チップ１５・１７の先端部及び先端面を外周面圧延部４１・４３及び先端面圧延部４５・４７により押延ばして正規形状に整形する際に、電極チップ１５・１７の先端部基端側に形成されるスカート片１５ａ・１７ａを、先端部基端側の外周面に圧接する切除アーム部４９ｂ・５１ｂの刃物により切削して除去しながら電極チップ１５・１７を所定の正規形状に整形することができる。 In the present embodiment, the tip and tip surfaces of the electrode tips 15 and 17 deformed by pressure contact with the workpiece are stretched by the outer peripheral surface rolling portions 41 and 43 and the tip surface rolling portions 45 and 47 to be shaped into a normal shape. Further, the skirt pieces 15a and 17a formed on the proximal end side of the distal end portion of the electrode tips 15 and 17 are removed by cutting with the blades of the resecting arm portions 49b and 51b that are in pressure contact with the outer peripheral surface on the proximal end side of the distal end portion. The electrode tips 15 and 17 can be shaped into a predetermined regular shape.

このため、電極チップ１５・１７の整形と同時にスカート片１５ａ・１７ａを同時に切除することができ、電極チップ１５・１７の再生を効率的に行うことができる。 For this reason, the skirt pieces 15a and 17a can be cut simultaneously with the shaping of the electrode tips 15 and 17, and the regeneration of the electrode tips 15 and 17 can be performed efficiently.

上記説明は、電極チップ再生具２３の形状を六角柱形状としたが、本発明はこれに限定されるものではなく、整形室に設けられる外周面圧延部及び逃し孔の数に応じて四角柱形状、八角柱形状等であってもよい。 In the above description, the shape of the electrode tip regenerator 23 is a hexagonal column shape, but the present invention is not limited to this, and a square column is formed according to the number of outer peripheral surface rolling portions and relief holes provided in the shaping chamber. It may be a shape, an octagonal prism shape, or the like.

上記説明は、電極チップ再生具２３を所要の方向へ回転して整形室３１・３３内に進入する電極チップ１５・１７の先端部外周面の変形部分に外周面圧延部４１・４３を圧接して先端面側へ押延ばした後に、先端面側に押延ばされた変形部分を先端面圧延部４５・４７により先端面に盛付けながら押延ばして先端面を正規形状に整形することにより電極チップ１５・１７を再生する構成としたが、電極チップ１５・１７を取外して再生作業を行う場合にあっては、電極チップ再生具２３を固定した状態で取外した電極チップ１５・１７を所要の方向へ回転して再生してもよいことは、勿論である。 In the above description, the outer peripheral surface rolling portions 41 and 43 are pressed against the deformed portions of the outer peripheral surfaces of the tip portions of the electrode tips 15 and 17 that enter the shaping chambers 31 and 33 by rotating the electrode tip regenerator 23 in a required direction. After extending to the front end surface side, the deformed portion extended to the front end surface side is stretched while being stacked on the front end surface by the front end surface rolling portions 45 and 47 to shape the front end surface into a regular shape, thereby forming an electrode. The chip 15/17 is regenerated, but when the electrode chip 15/17 is removed and the regeneration work is performed, the electrode chip 15/17 removed with the electrode chip regenerator 23 fixed is required. Of course, it may be reproduced by rotating in the direction.

上記説明は、切除部材４９・５１の切除アーム部４９ｂ・５１ｂに開口部４９ｃ・５１ｃを設けてスカート片１５ａ・１７ａを開口部４９ｃ・５１ｃの幅に応じた厚さで切削する構成としたが、切除アーム部４９ｂ・５１ｂの回転方向下手縁に刃先を形成して切除部材４９・５１とした構成であってもよい。 In the above explanation, openings 49c and 51c are provided in the cutting arms 49b and 51b of the cutting members 49 and 51, and the skirt pieces 15a and 17a are cut to a thickness corresponding to the width of the openings 49c and 51c. Alternatively, the cutting members 49 and 51 may be formed by forming cutting edges on the lower edges of the cutting arms 49b and 51b in the rotational direction.

１溶接ガン
３フレーム
５・７取付けアーム
１１・１３取付け軸
１５・１７電極チップ
１５ａ・１７ａスカート片
２１電極チップ再生装置
２３電極チップ再生具
２３ａ・２３ｂ凹部
２５回転盤
２５ａ装着孔
２７電動モータ
２９固定盤
３１・３３整形室
３５逃し穴
３７・３９底部
４１・４３圧延部の一部を構成する外周面圧延部
４５・４７圧延部の一部を構成する先端面圧延部
４９・５１切除部材
４９ａ・５１ａ固定アーム部
４９ｂ・５１ｂ切除アーム部
４９ｃ・５１ｃ開口部 DESCRIPTION OF SYMBOLS 1 Welding gun 3 Frame 5 * 7 Mounting arm 11 * 13 Mounting axis | shaft 15 * 17 Electrode tip 15a * 17a Skirt piece 21 Electrode tip reproduction | regeneration apparatus 23 Electrode tip reproduction | regeneration tool 23a * 23b Recessed part 25 Turntable 25a Mounting hole 27 Electric motor 29 Fixed Plates 31 and 33 Shaping chamber 35 Relief holes 37 and 39 Bottom portions 41 and 43 Peripheral surface rolling portions 45 and 47 constituting a part of the rolling portion Tip surface rolling portions 49 and 51 constituting a part of the rolling portion Cutting member 49a 51a Fixed arm portion 49b / 51b Cutting arm portion 49c / 51c Opening

Claims

抵抗溶接用電極チップの変形先端部に対して圧延部を圧接して正規形状に整形する電極チップ再生具において、
電極チップ再生具の開放端側における圧延部相互間に半径方向へ弾性変形可能で、圧延部に沿って垂下する切除アーム部を有した切除部材を設け、
電極チップの先端部外周面に対して相対的に回転する電極チップ再生具の圧延部を圧接しながら変形部分を押延ばして正規形状に整形する際に、上記押延ばしに伴って電極チップの先端部基端側の外周に沿って形成される押延ばし残片を切除部材により切除可能にする電極チップ再生具。 In the electrode tip regenerator that shapes the regular shape by pressing the rolled portion against the deformed tip of the resistance welding electrode tip,
Provided with a cutting member having a cutting arm part that is elastically deformable in the radial direction between the rolling parts on the open end side of the electrode tip regenerator and that hangs down along the rolling part,
When the deformed portion is stretched and shaped into a normal shape while pressing the rolled portion of the electrode tip regenerator that rotates relative to the outer peripheral surface of the tip portion of the electrode tip, the tip of the electrode tip is accompanied with the above-mentioned extension. An electrode tip regenerator that makes it possible to cut out the stretched residue formed along the outer periphery on the base end side with a cutting member.

請求項１において、
電極チップ再生具は、抵抗溶接用電極チップの少なくとも先端部が進入可能なカップ状の整形室の内周面に、周方向へ不等間隔をおいて所要の高さで開放端から底部に向かって湾曲状に延出して電極チップの先端部外周面に圧接可能な少なくとも３本の外周面圧延部及び整形室の底部に、中心軸線から偏心した位置に中心を有して軸線直交方向へ延出して電極チップの先端面に圧接可能な先端面圧延部を有し、
電極チップの先端部外周面に対して相対的に回転する各外周面圧延部を圧接しながら変形部分を先端面側へ押延ばして正規形状に整形した後に相対的に回転する先端面圧延部により先端面側に押延ばされた変形部分を電極チップの先端面に盛付けて平面状に押延ばして正規形状に整形する際に、上記押延ばしに伴って電極チップの先端部基端側の外周に形成される押延ばし残片を圧接する切除アーム部により切除可能にする電極チップ再生具。 In claim 1,
The electrode tip regenerator is formed on the inner peripheral surface of a cup-shaped shaping chamber into which at least the tip of the resistance welding electrode tip can enter, at an irregular interval in the circumferential direction from the open end to the bottom. The bottom of the shaping chamber and at least three outer peripheral surface rolling parts that extend in a curved shape and can be pressed against the outer peripheral surface of the tip end of the electrode tip have a center that is eccentric from the central axis and extend in the direction perpendicular to the axis. It has a tip surface rolling part that can be pressed out to the tip surface of the electrode tip,
By pressing the respective outer peripheral surface rolling portions that rotate relative to the outer peripheral surface of the tip of the electrode tip, the deformed portion is pushed to the front surface side and shaped into a normal shape and then rotated relatively by the front surface rolling portion. When the deformed portion stretched to the tip surface side is placed on the tip surface of the electrode tip and is flattened to be shaped into a normal shape, the tip of the tip end portion of the electrode tip on the side of the tip end of the electrode tip is accompanied with the extension. An electrode tip regenerating tool that can be excised by an excision arm portion that press-contacts a stretched extension piece formed on the outer periphery.

請求項１及び２のいずれかにおいて、
切除部材は、切除アーム部の開放端側から半径方向へ延出する固定アーム部を一体に設け、該固定アーム部を開放端面に設けられた係止凹部に係止して固定可能にした電極チップ再生具。 In any one of Claims 1 and 2,
The excision member is an electrode in which a fixed arm portion extending in the radial direction from the open end side of the excision arm portion is integrally provided, and the fixed arm portion can be locked by being locked in a locking recess provided in the open end surface. Chip reclaimer.

請求項１及び２のいずれかにおいて、
切除部材は、弾性変形可能な金属鋼材により形成した電極チップ再生具。 In any one of Claims 1 and 2,
The cutting member is an electrode tip regenerator formed of an elastically deformable metal steel material.

請求項３において、
切除アーム部及び固定アーム部は、ばね部を設けて一体化し、固定アーム部に対して切除アーム部を弾性変形可能にした電極チップ再生具。 In claim 3,
The excision arm portion and the fixed arm portion are integrated by providing a spring portion, and the excision arm portion is elastically deformable with respect to the fixed arm portion.

請求項１乃至５のいずれかにおいて、
切除部材の切除アーム部には、長手方向へ所定の幅で延出する開口部を設けて刃物とした電極チップ再生具。 In any one of Claims 1 thru | or 5,
An electrode tip regenerator having a cutting tool provided with an opening extending at a predetermined width in a longitudinal direction in a cutting arm portion of a cutting member.

請求項１乃至５のいずれかにおいて、
切除部材の切除アーム部における回転方向下手側端縁に刃先を形成して刃物とした電極チップ再生具。 In any one of Claims 1 thru | or 5,
An electrode tip regenerator using a cutting edge by forming a cutting edge at the lower edge of the cutting member in the rotational direction of the cutting arm.

請求項２において、
外周面圧延部の相互間に応じた整形室内には、軸線方向へ延出して外部と連通する逃し孔をそれぞれ設けると共に各逃し孔に対応する箇所に切除部材をそれぞれ設けた電極チップ再生具。 In claim 2,
An electrode tip regenerator provided with relief holes extending in the axial direction and communicating with the outside in the shaping chamber corresponding to the space between the outer peripheral surface rolling portions, and a cutting member provided at a location corresponding to each relief hole.

請求項３において、
電極チップ再生具は、電動モータの駆動連結された回転盤の中心部に設けられた装着孔に回り止めされた状態で挿嵌され、係止凹部に係止した固定アーム部を上記回転盤の中心部に固定される固定盤により挟持して固定可能にする電極チップ再生具。 In claim 3,
The electrode tip regenerator is inserted in a state where it is prevented from rotating in a mounting hole provided at the center of the rotating disk drive-connected to the electric motor, and the fixed arm part locked in the locking recess is connected to the rotating disk of the rotating disk. An electrode chip regenerator that can be fixed by being clamped by a fixed plate fixed to the center.

抵抗溶接用電極チップの変形先端部に対して圧延部を圧接して正規形状に整形する電極チップ再生方法において、
電極チップの先端部外周面に対して相対的に回転する圧延部を圧接しながら変形部分を押延ばして正規形状に整形する際に、電極チップ再生具の開放端側における圧延部相互間に半径方向へ弾性変形可能で、圧延部に沿って垂下する切除アーム部を有した切除部材により上記押延ばしに伴って電極チップの先端部基端側の外周に沿って形成される押延ばし残片を切除する電極チップ再生方法。 In the electrode tip regeneration method in which the rolled portion is pressed against the deformed tip of the resistance welding electrode tip and shaped into a normal shape,
When the deformed part is stretched and shaped into a normal shape while pressing the rolled part that rotates relative to the outer peripheral surface of the tip of the electrode tip, the radius between the rolled parts on the open end side of the electrode tip regenerator The cutting residue that is elastically deformable in the direction and that is formed along the outer periphery of the proximal end side of the distal end of the electrode tip with the above-described stretching by the cutting member having the cutting arm portion that hangs down along the rolling portion is cut off. To regenerate the electrode tip.