JP4955348B2 - Electrode wheel for mash seam welding and shaping tool and method thereof - Google Patents

Electrode wheel for mash seam welding and shaping tool and method thereof Download PDF

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JP4955348B2
JP4955348B2 JP2006238706A JP2006238706A JP4955348B2 JP 4955348 B2 JP4955348 B2 JP 4955348B2 JP 2006238706 A JP2006238706 A JP 2006238706A JP 2006238706 A JP2006238706 A JP 2006238706A JP 4955348 B2 JP4955348 B2 JP 4955348B2
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electrode
shaping
upper electrode
seam welding
tip
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JP2008055495A (en
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正二 三平
洋二 船井
修一 石田
浩二 金成
一彦 南
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Cleanup Corp
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Description

本発明は、湾曲状に縁折りされたフランジ部の上に相手板を重ね合わせ、その重ね合わせて形成された継ぎ手の先端角部を縁折りされたフランジ部の湾曲状の曲がり際またはその近傍にフランジ部にそって平滑にシーム溶接する場合に有用なシーム電極輪と、この電極輪を研削整形する整形バイト装置及び方法に関する。   The present invention superimposes a mating plate on a flange portion that is bent in a curved shape, and at or near the curved portion of the bent flange portion that is edge-folded at the tip corner of the joint formed by the overlapping. In particular, the present invention relates to a seam electrode ring that is useful when performing seam welding smoothly along a flange portion, and a shaping tool and method for grinding and shaping the electrode ring.

例えば、被溶接物である製品がステンレス製の薄板プレス品からなる流し台は、例えば図１０の平面図でその一構成例を示すように、一般にはシンクＡの開口した上端を外方に向けて縁折りしたフランジ部Ｂの上に相手板となる天板Ｃを重ね合わせ、その重ね合わせて形成された直線フランジ部とコーナーフランジ部からなる連続した継ぎ手全周をシーム溶接機で気密に接合して製作される。   For example, a sink which is a product to be welded made of a stainless steel sheet press product is generally arranged with the open upper end of the sink A facing outward as shown in one example of the configuration in the plan view of FIG. The top plate C, which is the mating plate, is overlapped on the flange portion B that has been folded, and the continuous joint consisting of the linear flange portion and the corner flange portion formed by the overlap is hermetically joined with a seam welding machine. Produced.

従来の流し台のシーム溶接方法としては、例えば特許文献１に開示された発明が知られている。この種の溶接方法は、例えば図１１に示すように、シンクＡ側の開口した上端を外方に向けて縁折りしたフランジ部Ｂに天板Ｃを重ね合わせ、その重ね合わせて形成された継ぎ手を、電極先端を傾斜させた傾斜踏み面Ｚを有する上部電極輪３１と、電極面の一側にフランジ部Ｂの折り返された裏面側と接する曲面部Ｔが形成された凸状部Ｕを有する下部電極輪３２とで挟みつけ、これに溶接に十分な加圧力を与えて継ぎ手の隙間Ｓを密着させると共に溶接電流を流して双方の電極輪を回転駆動しながら継ぎ手全周を電極加圧線Ｗに誘導させて気密に接合する。   As a conventional seam welding method for a sink, for example, the invention disclosed in Patent Document 1 is known. In this type of welding method, for example, as shown in FIG. 11, a top plate C is overlapped with a flange portion B whose edge is folded outward with the upper end opened on the sink A side facing outward, and a joint formed by overlapping the top plate C is formed. The upper electrode ring 31 having the inclined tread surface Z with the electrode tip inclined, and the convex portion U in which the curved surface portion T is formed on one side of the electrode surface and in contact with the back surface of the flange portion B that is folded back. It is sandwiched between the lower electrode ring 32, and a sufficient pressurizing force is applied to the welding to close the gap S of the joint, and a welding current is supplied to rotate both electrode wheels to rotate the entire circumference of the joint. It is guided to W and joined airtightly.

この場合、溶接部が製品に含まれるために、製品の表面に溶接跡すなわち凹み（圧痕ともいう）が生じると、製品の品質上当然問題となる。そこで、特許文献１の発明は、この凹みを製品の表面に生じさせないために、上部電極輪３１と下部電極輪３２の断面形状に着目し、下部電極輪３２の先端断面幅ｅを小さめにすると共に被溶接物と接する部位に凸状部Ｕを形成し、上部電極輪３１に下部電極輪３２よりも広い幅Ｅの傾斜踏み面Ｚを形成したものである。これによれば、溶接跡の凹みは製品の目立たないフランジ部Ｂの裏側に付くだけで、上部電極輪３１が加圧転動する製品の表面は平坦かつ滑らかになる、というものである。   In this case, since a welded part is included in the product, if a welding mark, that is, a dent (also referred to as an indentation) is generated on the surface of the product, it naturally becomes a problem in the quality of the product. Therefore, the invention of Patent Document 1 focuses on the cross-sectional shapes of the upper electrode wheel 31 and the lower electrode wheel 32 in order to prevent this dent from being generated on the surface of the product, and makes the tip cross-sectional width e of the lower electrode wheel 32 smaller. In addition, a convex portion U is formed at a portion in contact with the workpiece, and an inclined tread surface Z having a width E wider than that of the lower electrode ring 32 is formed on the upper electrode ring 31. According to this, the dent of the welding mark is only attached to the back side of the flange portion B where the product is inconspicuous, and the surface of the product on which the upper electrode ring 31 is pressed and rolled becomes flat and smooth.

特開平１１−２９１０５５号公報（段落０００６〜０００８、図１）Japanese Patent Laid-Open No. 11-291055 (paragraphs 0006 to 0008, FIG. 1)

しかしながら、シンクＡのフランジ部Ｂと重ね合わせて形成された天板Ｃの継ぎ手である開口端角部Ｇは、図１２に示すように、完全に平滑には至らず未溶接の端材が縁折りされたフランジ部Ｂの曲がり際Ｒに浮いた状態で残存してしまう。この残存部分は通常切削除去されるが、切削除去して後に残った部分は面取りやバフ研磨加工等の複数工程により滑らかに仕上げなければならない。この未溶接部の後処理作業は仕上げ加工に先立って人手や熟練者によって行なわれてきた。この種の従来工法は、作業性の改善の他に、粉塵・騒音等による衛生・環境問題も課題となっていた。
この発明はこのような問題点を解消するためになされたもので、未溶接部の切削除去作業を軽減することができるマッシュシーム溶接用の特殊構造の電極輪を提供することを目的とする。
また、この発明はこのような電極輪の電極表面を高い精度で研削整形することができる整形バイト装置および方法を提供することも目的としている。 However, as shown in FIG. 12, the opening end corner portion G, which is a joint of the top plate C formed so as to overlap the flange portion B of the sink A, is not completely smooth and is not completely welded. The folded flange portion B remains in a state of being floated at the time of bending. This remaining portion is usually removed by cutting, but the portion remaining after the cutting removal must be smoothly finished by a plurality of processes such as chamfering and buffing. The post-treatment work of the unwelded portion has been performed manually or by an expert prior to finishing. In this type of conventional method, in addition to the improvement of workability, the problem of hygiene and environment due to dust, noise, and the like has been a problem.
The present invention has been made to solve such problems, and an object of the present invention is to provide an electrode ring having a special structure for mash seam welding that can reduce the work of removing the unwelded portion by cutting.
Another object of the present invention is to provide a shaping tool and method capable of grinding and shaping the electrode surface of such an electrode ring with high accuracy.

第１の発明に係るマッシュシーム溶接用電極輪は、湾曲状に縁折りされたフランジ部に相手板を重ね合わせて形成された継ぎ手を一対の上部電極輪と下部電極輪によって挟み付け、そのフランジ部にそって前記継ぎ手を密着しかつ薄くして平滑に接合するマッシュシーム溶接機における前記上部電極輪および前記下部電極輪を備えるマッシュシーム溶接用電極輪において、前記フランジ部の湾曲部側である前記フランジ部の内側に位置する前記上部電極輪の内側周縁部の外径寸法が、前記フランジ部の湾曲部と反対側である前記フランジ部の外側に位置する前記上部電極輪の外側周縁部の外径寸法より大きく形成され、前記内側周縁部の円周方向の電極面には所定幅のローラフォロアが当接して前記上部電極輪の電極面の研削基準位置を確定するガイド部が形成され、前記外側周縁部の円周方向の電極面には、前記フランジ部の内側から外側方向に向かって前記フランジ部から離れる方向へ傾斜した所定幅の傾斜部が形成され、前記ガイド部と前記傾斜部との間には所定幅の傾斜した電極踏み面が円周方向に形成され、前記電極踏み面には前記フランジ部の縁折りされた湾曲面と略同等の曲率をもつ凹状の曲面がその円周方向に形成されたものである。 The electrode ring for mash seam welding according to the first invention is such that a joint formed by overlapping a mating plate on a flange portion bent in a curved shape is sandwiched between a pair of upper electrode wheel and lower electrode wheel, and the flange Oite the upper electrode wheel and the electrode wheel mash seam welding with the lower electrode wheel definitive mash seam welding machine for smoothly joined with and and thinning close contact with the joint along the part, the curved portion of the flange portion The outer diameter of the inner peripheral edge portion of the upper electrode ring located inside the flange portion that is the outer side of the upper electrode wheel located outside the flange portion that is opposite to the curved portion of the flange portion A roller follower with a predetermined width is in contact with the circumferential electrode surface of the inner peripheral edge to determine the grinding reference position of the electrode surface of the upper electrode wheel. That the guide portion is formed, wherein the circumferential direction of the electrode surface of the outer peripheral portion, the inclined portion of predetermined width which is inclined in a direction away from the flange portion toward the outside direction from the inside of the flange portion is formed, An inclined electrode tread surface having a predetermined width is formed in a circumferential direction between the guide portion and the inclined portion, and the electrode tread surface has a curvature substantially equal to the curved surface of the flange portion which is bent. A concave curved surface is formed in the circumferential direction.

第２の発明に係るマッシュシーム溶接用電極輪の整形バイト装置は、請求項１に記載のマッシュシーム溶接用電極輪の上部電極輪を研削整形するための整形バイト装置であって、前記ローラフォロアが当接する前記ガイド部に対応する直線形刃先を有して前記上部電極輪の回転駆動により前記ガイド部の表面を円周方向に研削整形するための第１角チップと前記傾斜部に対応する傾斜させた直線形刃先を有して前記上部電極輪の回転駆動により前記傾斜部の表面を円周方向に研削整形するための第２角チップとが同一の第１バイトホルダに支持され、前記上部電極輪の回転駆動により前記電極踏み面の凹状の曲面をその円周方向に研削整形するための円形チップが前記第１バイトホルダとは分離独立した第２バイトホルダに支持されたものである。   A shaping bite device for an electrode ring for mash seam welding according to a second aspect of the present invention is the shaping bite device for grinding and shaping the upper electrode ring of the electrode ring for mash seam welding according to claim 1, wherein the roller follower Corresponding to the inclined portion and the first square tip for grinding and shaping the surface of the guide portion in the circumferential direction by the rotational drive of the upper electrode wheel. A second cutting edge having an inclined linear cutting edge and grinding and shaping the surface of the inclined portion in the circumferential direction by rotational driving of the upper electrode wheel is supported by the same first tool holder, A circular tip for grinding and shaping the concave curved surface of the electrode tread surface in the circumferential direction by rotating the upper electrode wheel is supported by a second bit holder that is separated and independent from the first bit holder. That.

第３の発明に係るマッシュシーム溶接用電極輪の整形バイト方法は、請求項１に記載のマッシュシーム溶接用電極輪の上部電極輪を研削整形するための整形バイト方法であって、前記ガイド部に対応した直線刃を前記ガイド部の表面に幅方向に当接させて前記上部電極輪の回転駆動により前記ガイド部の表面を円周方向に研削整形する第１整形工程と、前記傾斜部に対応した直線刃を前記傾斜部の表面に幅方向に当接させて前記上部電極輪の回転駆動により前記傾斜部の表面を円周方向に研削整形する第２整形工程と、前記電極踏み面の凹状の曲面と略同等の曲率を有する曲線刃を前記電極踏み面の凹状の曲面に当接させて前記上部電極輪の回転駆動により該曲面を円周方向に研削整形する第３整形工程とを含む方法である。   A shaping bite method for an electrode ring for mash seam welding according to a third invention is a shaping bite method for grinding and shaping an upper electrode ring of an electrode ring for mash seam welding according to claim 1, wherein the guide portion A first shaping step of abutting a linear blade corresponding to the width of the guide portion in the width direction and grinding and shaping the surface of the guide portion in the circumferential direction by rotational driving of the upper electrode wheel; and A second shaping step in which a corresponding straight blade is brought into contact with the surface of the inclined portion in the width direction, and the surface of the inclined portion is ground and shaped in the circumferential direction by rotational driving of the upper electrode wheel; A third shaping step in which a curved blade having substantially the same curvature as the concave curved surface is brought into contact with the concave curved surface of the electrode tread surface, and the curved surface is ground and shaped in a circumferential direction by rotational driving of the upper electrode wheel; It is the method of including.

第１の発明に係るマッシュシーム溶接用電極輪によれば、加圧時の上部電極輪と下部電極輪との間の強大な加圧力で、湾曲状に縁折りされたフランジ部の曲がり際またはその近傍に形成された継ぎ手の開口端角部を上部電極輪の電極踏み面が覆い被さる形で押圧し、塑性変形させることによって完全に密着させかつ薄くし、平滑に接合することができる。   According to the electrode ring for mash seam welding according to the first aspect of the present invention, when the flange portion bent in a curved shape is bent by the strong pressure between the upper electrode wheel and the lower electrode wheel during pressurization or The opening end corner portion of the joint formed in the vicinity thereof is pressed so as to cover the electrode tread surface of the upper electrode ring, and is plastically deformed so that it can be completely adhered and thinned and smoothly joined.

また、相手板の継ぎ手端部をフランジ部の曲がり際に位置させることにより、前記継ぎ手端部近傍にナゲットを形成することができるため、上部電極輪と下部電極輪との間を通過する間に継ぎ手端部が発熱と高い加圧力によって塑性流動して薄くなると同時に正常なナゲットが縁折りされたフランジ部の曲がり際に沿って連続的に生成される。したがって、継ぎ手端部の切削加工や面取り加工などの溶接後の荒削り工程が省略できるほか、溶接品質の向上、溶接後処理工数削減によるコストカット、生産性の向上、設備省力化が同時に得られる。また、従来行なわれてきた未溶接部の後処理作業の軽減化により、衛生・環境条件を大幅に改善することができる。   In addition, since the nugget can be formed in the vicinity of the joint end by positioning the joint end of the mating plate at the time of bending of the flange portion, while passing between the upper electrode ring and the lower electrode ring The joint end is plastically flown and thinned by heat generation and high pressure, and at the same time, a normal nugget is continuously generated along the bending of the edge-folded flange. Therefore, it is possible to omit the roughing process after welding such as cutting and chamfering of the joint end, and at the same time, it is possible to improve welding quality, cut costs by reducing the number of post-welding processes, improve productivity, and save labor. In addition, hygiene / environmental conditions can be greatly improved by reducing post-processing work of unwelded parts that has been performed conventionally.

また、相手板の継ぎ手端部をフランジ部の上に密着し、フランジ部の湾曲状の曲がり際で重ね合わせ、継ぎ手の板厚を薄くマッシュダウンしながらシーム溶接することができるので、継ぎ手端部を溶接と同時に平滑加工することができ、溶接後の仕上げ工数を省略することが可能となる。   In addition, the joint end of the mating plate can be closely attached to the flange, and can be seam welded while thinly mashing down the thickness of the joint because the flange is bent at the curved bend. Can be smoothed simultaneously with welding, and the finishing man-hours after welding can be omitted.

第２の発明に係るマッシュシーム溶接用電極輪の整形バイト装置によれば、第１および第２角チップのための第１バイトホルダと円形チップのための第２バイトホルダを互いに分離独立させたので、ガイド部および傾斜部の研削と電極踏み面の凹状の曲面の研削量を個々に微調整することができ、これにより電極輪径が磨耗・変化してもローラフォロアのガイド部の表面と円形チップの先端刃先との間に一定の研削基準位置を確定することができ、常に一定の研削量を確保することができる。このため、高い切削精度要求にも即対応することとなり、溶接品質が向上する。また、切削時のビビリ発生を少なく整形することができ、溶接しながら電極踏み面の凹状の曲面とガイド部および傾斜部の研削整形が略同時にできるので電極面のメンテナンスが容易になる。さらに、第２角チップにより傾斜部の表面を切削整形するので、被溶接物の表面を汚さずに溶接することができる。   According to the shaping tool of the electrode ring for mash seam welding according to the second aspect of the invention, the first tool holder for the first and second corner tips and the second tool holder for the circular tip are separated from each other. Therefore, the grinding amount of the guide part and the inclined part and the grinding amount of the concave curved surface of the electrode tread surface can be finely adjusted individually, so that the surface of the guide part of the roller follower can be adjusted even if the electrode ring diameter is worn or changed. A constant grinding reference position can be established between the tip of the circular chip and the constant cutting amount. For this reason, a high cutting accuracy requirement is immediately met, and the welding quality is improved. Further, chattering during cutting can be reduced and shaping can be performed at the same time while the concave curved surface of the electrode tread surface and the guide portion and the inclined portion can be ground and shaped while welding, thereby facilitating maintenance of the electrode surface. Furthermore, since the surface of the inclined portion is cut and shaped by the second square tip, the surface of the workpiece can be welded without being contaminated.

第３の発明に係るマッシュシーム溶接用電極輪の整形バイト方法によれば、第１切削整形工程でローラフォロアが当接するガイド部の電極表面を直線刃によって研削整形するので、電極輪が次第に磨耗変形して電極輪径が小さく変化していく間、ガイド部から刃先までの切削基準位置を常に一定に確保することができ、次の第２切削整形工程の傾斜部の電極表面を研削整形する場合の直線刃の切削条件設定が容易となる。また次の第３切削整形工程でも電極踏み面の凹状の曲面を円周方向に研削整形するとき、円形刃の刃先の逃げ角度が変化しても最適な条件に維持することができる。それによってシーム電極輪の円周方向の電極表面に発生する切削量のばらつきやビビリの発生を防止すると共に０．０１５〜０．０６ｍｍ以内の高い研削精度の要求を満足させることができ、ナゲットを連続生成することができるので、溶接した表面ビード外観も波打ちビードが少なく、溶接品質を上げることができる。   According to the shaping tool of the electrode ring for mash seam welding according to the third invention, the electrode surface of the guide portion with which the roller follower abuts is ground and shaped by the straight blade in the first cutting shaping process, so that the electrode wheel is gradually worn out. While the electrode ring diameter is deformed and changes small, the cutting reference position from the guide part to the cutting edge can be always kept constant, and the electrode surface of the inclined part in the next second cutting shaping process is ground and shaped. In this case, it is easy to set the cutting conditions for the straight blade. Even in the next third cutting shaping process, when the concave curved surface of the electrode tread surface is ground and shaped in the circumferential direction, the optimum condition can be maintained even if the clearance angle of the cutting edge of the circular blade changes. As a result, it is possible to prevent variations in the amount of cutting and chattering that occur on the electrode surface in the circumferential direction of the seam electrode ring, and to satisfy the demand for high grinding accuracy within 0.015 to 0.06 mm. Since it can be produced continuously, the appearance of the welded surface bead is less wavy and the welding quality can be improved.

以下、この発明の実施の形態を添付図面に基づいて説明する。
流し台のシンクに天板を接合する際に有用なシーム電極輪とその電極輪の研削整形方法とこれを実施するための装置を例にとって本発明を説明する。シンクと天板とを重ね合わせて形成される継ぎ手の開口端角部をシーム溶接と同時にフランジ部の縁折りされた曲がり際またはその近傍位置に密着させて平滑に接合し、開口端角部の未溶接部分を残さずその角部も溶接部に含めて開口端全周にわたってマッシュシーム溶接を行う。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
The present invention will be described with reference to a seam electrode wheel useful for joining a top plate to a sink of a sink, a method for grinding and shaping the electrode wheel, and an apparatus for carrying out the method. At the opening end corner of the joint formed by overlapping the sink and the top plate, seam welding is performed at the same time as the edge of the flange when it is bent or in the vicinity thereof, and the joint is smoothly joined. Mash seam welding is performed over the entire circumference of the open end, including the unwelded portion and the corners included in the weld.

図１は本実施の形態に係るマッシュシーム溶接機の上部電極輪と下部電極輪の先端形状を示す図である。上部電極輪１と下部電極輪２は銅又は銅合金から形成され、その先端断面幅Ｅ１、Ｅ２は略１２〜１５ｍｍ程度で、下部電極輪２は例えば２４０ｍｍの外径を有している。下部電極輪２は先端に平面部３を備える形状を有し、上部電極輪１の先端断面幅Ｅ１と同等にするかまたはそれより広幅に形成されている。また、下部電極輪２の片側面にはシンクＡの側板Ｄの上部に形成されたフランジ部Ｂの表面に電極が当る部分を傷つけないようにフランジ部Ｂの湾曲部と略同等の曲率例えば曲率半径約５ｍｍとする曲面部４が形成されている。   FIG. 1 is a diagram showing the tip shapes of the upper electrode wheel and the lower electrode wheel of the mash seam welder according to the present embodiment. The upper electrode wheel 1 and the lower electrode wheel 2 are made of copper or a copper alloy, the tip cross-sectional widths E1 and E2 are about 12 to 15 mm, and the lower electrode wheel 2 has an outer diameter of 240 mm, for example. The lower electrode ring 2 has a shape having a flat surface portion 3 at the tip, and is formed to be equal to or wider than the tip cross-sectional width E1 of the upper electrode wheel 1. Further, on one side surface of the lower electrode ring 2, a curvature substantially equal to the curved portion of the flange portion B, for example, a curvature so as not to damage a portion where the electrode hits the surface of the flange portion B formed on the upper portion of the side plate D of the sink A. A curved surface portion 4 having a radius of about 5 mm is formed.

上部電極輪１は、図２に示すように、縁折りされたフランジ部Ｂの内側に位置する内側周縁部の外径Ｈが、フランジ部Ｂの外側に位置する外側周縁部の外径ｈより大きく形成されている。内側周縁部の外径Ｈを例えば２４０ｍｍとした場合に、外側周縁部の外径ｈは例えば２３７ｍｍに形成される。そして、内側周縁部には、例えば約２４ｍｍの外径を有する後述のローラフォロアが当接して電極輪径の基準位置を決めるためのガイド部７が所定幅、例えば約２．５ｍｍ幅の直線面をもって円周方向に形成されている。   As shown in FIG. 2, the upper electrode ring 1 has an outer diameter H of an inner peripheral edge located inside the edge-folded flange B that is larger than an outer diameter h of an outer peripheral edge located outside the flange B. Largely formed. When the outer diameter H of the inner peripheral edge is, for example, 240 mm, the outer diameter h of the outer peripheral edge is, for example, 237 mm. Further, a guide portion 7 for determining a reference position of the electrode ring diameter by contacting a roller follower (described later) having an outer diameter of about 24 mm, for example, on the inner peripheral edge is a linear surface having a predetermined width, for example, about 2.5 mm. Is formed in the circumferential direction.

また、上部電極輪１の外側周縁部には、所定幅、例えば約３ｍｍ幅でフランジ部Ｂの内側方向から水平線Ｘに対し約１０°程度の僅かな逃げ角度をもって外側方向に向かって広がる傾斜部８が円周方向に形成されている。また、ガイド部７と傾斜部８との間には所定幅、例えば約６．５ｍｍ幅の電極踏み面９が円周方向に形成されている。この電極踏み面９は、ガイド部７から傾斜部８に向かって次第に傾斜した傾斜面９ａと、湾曲状に縁折りされたフランジ部の曲がり際又はその近傍の湾曲部と略同等の曲率半径、例えば約１０ｍｍ程度の断面略凹形に湾曲した曲面９ｂとを有している。   In addition, the outer peripheral edge of the upper electrode wheel 1 has a predetermined width, for example, a width of about 3 mm, and an inclined portion extending outward from the inner side of the flange B with a slight clearance angle of about 10 ° with respect to the horizontal line X. 8 is formed in the circumferential direction. An electrode tread surface 9 having a predetermined width, for example, a width of about 6.5 mm is formed between the guide portion 7 and the inclined portion 8 in the circumferential direction. The electrode tread surface 9 includes an inclined surface 9a that is gradually inclined from the guide portion 7 toward the inclined portion 8, and a curvature radius that is substantially equivalent to the bending portion at the time of bending of the flange portion that is bent in a curved shape or in the vicinity thereof, For example, it has a curved surface 9b curved in a substantially concave shape with a cross section of about 10 mm.

このように傾斜面９ａと曲面９ｂとを有する電極踏み面９が重ね代の開口端角部Ｇに上から覆い被さる格好となり、しかも強力な加圧力をかけて通電・加熱溶融して溶接することができ、同時に塑性流動するナゲットは縁折りされたフランジ部Ｂの曲がり際またはその近傍に形成された継ぎ手を所望の板厚までマッシュダウンし、重ね溶接部が湾曲面にそって薄く潰され平滑に接合される。図３はシーム溶接後の直線フランジ部の平滑な溶接部断面を示す。   In this way, the electrode tread surface 9 having the inclined surface 9a and the curved surface 9b is covered from the top to the opening end corner G of the overlap allowance, and it is welded by applying a strong pressurizing current, heating and melting. Nuggets that can be plastically flowed at the same time, mash down the joint formed at or near the edge of the flange part B where the edge is bent to the desired plate thickness, and the lap weld is thinly crushed along the curved surface. To be joined. FIG. 3 shows a smooth weld section of the straight flange after seam welding.

図４〜図９を参照して本発明の切削整形バイト装置１０について説明する。整形バイト装置１０は第１バイト装置１１ａと第２バイト装置１１ｂとを備えている。第１バイト装置１１ａには第１バイトホルダ１０ａが、第２バイト装置１１ｂには第２バイトホルダ１０ｂがそれぞれ支持されている。   A cutting and shaping tool 10 of the present invention will be described with reference to FIGS. The shaping byte device 10 includes a first byte device 11a and a second byte device 11b. A first bite holder 10a is supported on the first bite device 11a, and a second bite holder 10b is supported on the second bite device 11b.

具体的には図４と図５に示すように、上部電極輪１の電極ヘッドケース５の側面にブラケット１２がボルトなどで取り付けられている。第１バイト装置１１ａと第２バイト装置１１ｂは、それぞれブラケット１２に配置された直動転がりガイド装置を有している。このガイド装置は、走行方向が電極輪方向に向けて固定されたガイドレール１３を有し、ガイドレール１３の上にスライド部１４がスライド自在に組み込まれている。さらに、スライド部１４にフレーム１５が支持され、フレーム１５の先端にローラフォロア６が支持されている。図示省略したが、スライド部１４はその内部に設けられた循環溝にボール（鋼球）が収納され、そのボールがガイドレール１３に沿って順繰りに転がることによりフレーム１５を移動させる。   Specifically, as shown in FIGS. 4 and 5, a bracket 12 is attached to the side surface of the electrode head case 5 of the upper electrode wheel 1 with a bolt or the like. Each of the first bite device 11a and the second bite device 11b has a linear motion rolling guide device disposed on the bracket 12. This guide device has a guide rail 13 whose traveling direction is fixed toward the electrode wheel direction, and a slide portion 14 is slidably incorporated on the guide rail 13. Further, the frame 15 is supported by the slide portion 14, and the roller follower 6 is supported at the tip of the frame 15. Although not shown in the drawings, the slide portion 14 accommodates balls (steel balls) in circulation grooves provided therein, and the balls 15 are moved along the guide rails 13 to move the frame 15.

ローラフォロア６は上部電極輪１の中心点を通る半径方向の軸心線上に位置されている。フレーム１５は機械的な往復運動を発生するアクチュエータたとえばシリンダ１６（又は電動モータ）等によりスライド部１４全体を前進させ、これによりローラフォロア６の表面が上部電極輪１のガイド部７の表面に当接される。   The roller follower 6 is positioned on the axial center line in the radial direction passing through the center point of the upper electrode ring 1. The frame 15 is moved forward by the entire slide portion 14 by an actuator that generates a mechanical reciprocating motion, such as a cylinder 16 (or an electric motor), so that the surface of the roller follower 6 contacts the surface of the guide portion 7 of the upper electrode wheel 1. Touched.

図６に示すように、第１バイト装置１１ａの第１バイトホルダ１０ａの先端には四辺形の角チップ１７および角チップ１８が上部電極輪１の電極面中心線Ｑに対し非対称的に配置されかつボルトＢ１、Ｂ２により着脱可能に取り付けられている。角チップ１７および角チップ１８は一辺の直線刃がガイド部７と傾斜部８の両面に対して同時に当接される。この場合、角チップ１８は上部電極輪１の傾斜部８の逃げ角度１０°に対応した傾斜角度で当接される。角チップ１７、１８としては、市販の規格製品であるスローアウエイチップ等が使用される。   As shown in FIG. 6, a quadrilateral corner tip 17 and a corner tip 18 are asymmetrically arranged with respect to the electrode surface center line Q of the upper electrode ring 1 at the tip of the first tool holder 10 a of the first tool device 11 a. And it is detachably attached by bolts B1 and B2. In the corner tip 17 and the corner tip 18, a straight blade on one side is simultaneously brought into contact with both surfaces of the guide portion 7 and the inclined portion 8. In this case, the corner tip 18 is brought into contact with an inclination angle corresponding to the relief angle 10 ° of the inclined portion 8 of the upper electrode wheel 1. As the corner tips 17 and 18, a throwaway tip or the like which is a commercially available standard product is used.

このような第１バイト装置１１ａにより、ローラフォロア６が当接する上部電極輪１のガイド部７の表面には直線刃となる角チップ１７が当接すると共に上部電極輪１の傾斜部８の表面にはこの傾斜角に対応させて直線刃となる角チップ１８が当接し、第１整形工程と第２整形工程の研削整形が上部電極輪１の回転運動により同時に実行される。   By such a first bite device 11a, a square tip 17 serving as a straight blade abuts on the surface of the guide portion 7 of the upper electrode ring 1 with which the roller follower 6 abuts and also on the surface of the inclined portion 8 of the upper electrode ring 1 Corresponding to this inclination angle, the square tip 18 which becomes a straight blade abuts, and the grinding shaping in the first shaping step and the second shaping step is performed simultaneously by the rotational movement of the upper electrode wheel 1.

もう一つの第２バイト装置１１ｂは、第１バイト装置１１ａの近傍に配置されていて上部電極輪１の電極踏み面９を研削整形するための円形チップ２０を有している。第２バイト装置１１ｂは、上部電極輪１の電極踏み面９の凹状の曲面９ｂと略同等の曲率を有する円形チップ２０によりその曲線刃を電極踏み面９の曲面９ｂに押し当てて円周方向に研削整形する第３整形工程を実行するものである。   Another second bite device 11b has a circular tip 20 which is disposed in the vicinity of the first bite device 11a and for grinding and shaping the electrode tread surface 9 of the upper electrode ring 1. The second bite device 11b presses the curved blade against the curved surface 9b of the electrode tread surface 9 with a circular tip 20 having a curvature substantially equal to the concave curved surface 9b of the electrode tread surface 9 of the upper electrode wheel 1 in the circumferential direction. A third shaping step of grinding and shaping is performed.

図７に示すように、第２バイト装置１１ｂの第２バイトホルダ１０ｂの先端には、直径約２０ｍｍの薄い円板状の円形チップ２０がボルト締めで着脱可能に支持されている。この円形チップ２０が上部電極輪１の電極踏み面９の凹状の曲面９ｂに押し当てられる。
図８に示すように、円形チップ２０は直径２０ｍｍ、厚さ５ｍｍほどのものであり、第２バイトホルダ１０ｂの先頭部に円形チップ２０の板厚と略同等の切り欠き深さを有する断面略Ｌ字形の段差をつけて形成された円形チップ取り付け部２２に取り付けられている。円形チップ２０の環状の先端刃先のうち、ほぼ半分が取り付け部２２から円弧状に突き出し、残り半分が取り付け部２２の段差をストッパ受け部としてこの段差に当接するようにして設置される。円形チップ２０の中心部に形成された貫通穴にボルト２３を挿入して第２バイトホルダ１０ｂの円形チップ取り付け部２２に形成されたねじ孔２４に締め付けられ、第２バイトホルダ１０ｂの上面２５と円形チップ２０の上面２６とが略同一平面になるようにしっかり固定されている。これにより、図７に示すように、円形チップ２０が電極踏み面９の凹状の曲面９ｂに押し当てられ、上部電極輪１の回転駆動により曲面９ｂを円周方向に研削整形する第３整形工程が実施される。
なお、円形チップ２０としては、市販の規格製品で知られているスローアウエイチップ等を使用することができる。 As shown in FIG. 7, a thin disk-like circular chip 20 having a diameter of about 20 mm is detachably supported by bolting at the tip of the second bite holder 10b of the second bite device 11b. The circular tip 20 is pressed against the concave curved surface 9 b of the electrode tread surface 9 of the upper electrode wheel 1.
As shown in FIG. 8, the circular tip 20 has a diameter of about 20 mm and a thickness of about 5 mm, and has a cross-sectional shape having a notch depth substantially equal to the plate thickness of the circular tip 20 at the leading end of the second bite holder 10 b. It is attached to a circular chip attachment portion 22 formed with an L-shaped step. Almost half of the circular tip 20 of the circular tip 20 protrudes in an arc shape from the mounting portion 22, and the other half is installed with the step of the mounting portion 22 as a stopper receiving portion so as to contact the step. A bolt 23 is inserted into a through hole formed in the center of the circular tip 20 and tightened into a screw hole 24 formed in the circular tip mounting portion 22 of the second tool holder 10b. The circular chip 20 is firmly fixed so as to be substantially flush with the upper surface 26 of the circular chip 20. As a result, as shown in FIG. 7, a third shaping step is performed in which the circular tip 20 is pressed against the concave curved surface 9 b of the electrode tread surface 9 and the curved surface 9 b is ground and shaped in the circumferential direction by the rotational drive of the upper electrode wheel 1. Is implemented.
In addition, as the circular chip | tip 20, the throwaway chip | tip etc. which are known by a commercially available standard product can be used.

第１バイト装置１１ａ及び第２バイト装置１１ｂは、いずれもローラフォロア６を上部電極輪１のガイド部７に当接して電極輪径の研削基準位置を確保した後、マイクロメータ２１または調整ネジもしくはボールねじ、ナットによる電動機（図省略）等により第１バイトホルダ１０ａおよび第２バイトホルダ１０ｂが、それぞれ１／１０ｍｍないし１／１００ｍｍの精度で移動され、これにより角チップ１７、１８および円形チップ２０の位置の微調整が簡便に行われる。   Both the first bite device 11a and the second bite device 11b contact the roller follower 6 with the guide portion 7 of the upper electrode wheel 1 to secure the grinding reference position of the electrode ring diameter, and then the micrometer 21 or the adjusting screw or The first tool holder 10a and the second tool holder 10b are moved with an accuracy of 1/10 mm to 1/100 mm, respectively, by an electric motor (not shown) such as a ball screw and a nut, whereby the square tips 17, 18 and the circular tip 20 are moved. Fine adjustment of the position of is easily performed.

この切削整形バイト装置１０においては、上部電極輪１のガイド部７を直線形に研削整形する角チップ１７と傾斜部８を直線形に研削整形する角チップ１８とが共通の第１バイトホルダ１０ａに上部電極輪１の電極面中心線Ｑに対して非対称的に配置され、しかも着脱が自在（交換可能）に取り付けられている。また、電極踏み面９の凹状の曲面９ｂをその円周方向に切削整形する円形チップ２０が、第１バイトホルダ１０ａとは別の独立した第２バイトホルダ１０ｂに同様に着脱可能に取り付けられている。角チップ１７および角チップ１８の加圧力と円形チップ２０の加圧力は、上部電極輪１に対して個々に与えられるように構成されている。   In this cutting and shaping tool 10, a first tool holder 10 a having a common corner tip 17 for grinding and shaping the guide portion 7 of the upper electrode ring 1 in a straight line and a square tip 18 for grinding and shaping the inclined portion 8 to a straight shape. Are arranged asymmetrically with respect to the electrode surface center line Q of the upper electrode ring 1 and are detachably attached (replaceable). Further, the circular tip 20 for cutting and shaping the concave curved surface 9b of the electrode tread surface 9 in the circumferential direction thereof is detachably attached in the same manner to an independent second bit holder 10b different from the first bit holder 10a. Yes. The pressurizing force of the square tip 17 and the square tip 18 and the pressurizing force of the circular tip 20 are configured to be individually applied to the upper electrode wheel 1.

また、角チップ１７、１８および円形チップ２０の刃先は、図９に示すように、上部電極輪１の円周方向に対する接線から電極回転方向に次第に広がるように、１１°程度の逃げ角度を持つように調整される。このように、角チップ１７、１８および円形チップ２０の刃先の逃げ角度を適正値に設定することにより、電極輪径が変化したときでも高い精度で研削することが可能となる。   Further, as shown in FIG. 9, the cutting edges of the corner tips 17, 18 and the circular tip 20 have a clearance angle of about 11 ° so as to gradually spread in the electrode rotation direction from the tangent to the circumferential direction of the upper electrode ring 1. To be adjusted. As described above, by setting the clearance angles of the cutting edges of the corner tips 17 and 18 and the circular tip 20 to appropriate values, it becomes possible to perform grinding with high accuracy even when the electrode ring diameter changes.

円形チップ２０の刃先の逃げ角度が９°以下に小さくなると、電極表面のビビリの発生が顕著となり、チップ先端刃先が早期に磨耗し、溶接ビード外観はもちろんのこと、溶接内部における欠陥の発生率も高くなることが確認された。また、逆に逃げ角度が１３°以上に大きくなると、キリ粉がチップ先端刃先に付着し、切削精度にばらつきが生じ、ひいては研削不能となるおそれがあり、溶接不良率が高くなることが確認された。   When the clearance angle of the cutting edge of the circular tip 20 is reduced to 9 ° or less, the occurrence of chattering on the electrode surface becomes remarkable, the tip edge of the tip wears quickly, and the defect bead generation rate as well as the appearance of the weld bead is observed. It was also confirmed that it was higher. On the other hand, if the clearance angle is increased to 13 ° or more, it is confirmed that the dust powder adheres to the tip edge of the tip, resulting in variations in cutting accuracy, which may result in inability to grind and increase the welding defect rate. It was.

流し台は、ワーク板厚０．６ｍｍ〜０．８ｍｍ程度の薄いステンレス板から形成される。シンクＡは、水槽部分の底部から垂直方向に立ち上がる側板Ｄの上端の開口縁を外方に向かって湾曲状に折り返して水平面内にフランジ部Ｂがプレス形成されたものである。天板Ｃには、シンクＡのフランジ部Ｂの上に重ねられる開口端が形成されている。図１に示すように、天板Ｃの開口端角部Ｇと縁折りされたフランジ部Ｂの曲がり際の加圧点Ｗまでの距離ｍを天板Ｃの出し代として略２．０ｍｍ程度内側に位置させて平坦なフランジ部の上に重ね合わせる。   The sink is formed from a thin stainless steel plate having a workpiece plate thickness of about 0.6 mm to 0.8 mm. In the sink A, the opening edge of the upper end of the side plate D rising in the vertical direction from the bottom of the water tank portion is bent outwardly in a curved shape, and the flange portion B is press-formed in a horizontal plane. The top plate C is formed with an open end that is superimposed on the flange portion B of the sink A. As shown in FIG. 1, the distance m to the pressurization point W at the time of bending of the opening edge corner G of the top plate C and the flange portion B that is edge-folded is about 2.0 mm inside as the allowance of the top plate C. And place it on the flat flange.

これによって、天板Ｃの開口端角部Ｇはフランジ部Ｂの湾曲面から水平面内に僅かに突き出た状態でフランジ部Ｂの上に継ぎ手が形成される。かくして形成された継ぎ手には、図１に示すように水平面内に突き出た開口端角部Ｇとフランジ部Ｂの湾曲面との間に僅かな断面三角形状の隙間Ｓが形成されるが、フランジ部Ｂと天板Ｃとがズレないようスポット溶接により仮付けされる。   Accordingly, a joint is formed on the flange portion B in a state where the opening end corner portion G of the top plate C slightly protrudes from the curved surface of the flange portion B into the horizontal plane. As shown in FIG. 1, a gap S having a slight triangular cross section is formed between the open end corner G protruding in the horizontal plane and the curved surface of the flange B, as shown in FIG. The part B and the top plate C are temporarily attached by spot welding so as not to be displaced.

仮付けされた後、ワークは産業用ロボットまたはマニュピュレータ等の自動搬送機によってマッシュシーム溶接機に搬送され、マッシュシーム溶接機により継ぎ手部全周に対して本溶接が行なわれる。   After being tacked, the workpiece is transferred to a mash seam welding machine by an automatic transfer machine such as an industrial robot or a manipulator, and main welding is performed on the entire circumference of the joint by the mash seam welding machine.

シーム溶接機へのワークの誘導は手持ちで行うか、またはシンクＡの形状と相似形のバックバー（図示省略）を使用してフランジ部Ｂの下側に当てがい、バックバーをリンク機構等の自動倣い機構によりシーム溶接機の電極輪の回転力で溶接軌跡を倣い誘導して溶接が行なわれる。フランジ部Ｂと天板Ｃの継ぎ手は、シーム溶接機の上部電極輪１と下部電極輪２との間の加圧点Ｗにおいて誘導され、継ぎ手全周にわたって気密に溶接される。   The work is guided to the seam welder by hand, or a back bar (not shown) similar to the shape of the sink A is used and applied to the lower side of the flange B, and the back bar is attached to a link mechanism or the like. Welding is performed by copying and guiding the welding locus by the rotational force of the electrode wheel of the seam welding machine by the automatic scanning mechanism. The joint between the flange portion B and the top plate C is guided at a pressure point W between the upper electrode wheel 1 and the lower electrode wheel 2 of the seam welder, and is airtightly welded over the entire circumference of the joint.

このようにすることにより、天板Ｃの開口端角部Ｇをフランジ部Ｂの平坦面から湾曲面に移る曲がり際Ｒ又はその近傍に密着させ、かつ抵抗加熱により溶融部が塑性流動作用によって所望の継ぎ手厚さになるまで薄く潰しながら、平滑に接合することができる。   By doing in this way, the opening end corner part G of the top plate C is brought into close contact with the curved portion R or the vicinity thereof that moves from the flat surface of the flange part B to the curved surface, and the melting part is desired by the plastic flow action by resistance heating. It can be smoothly joined while thinly crushed until the joint thickness becomes.

上部電極輪１に対する円形チップ２０と角チップ１７、１８の個々に与えられる加圧力１．２〜１．５ｋＮ、１周の切削量０．０１５〜０．０６ｍｍ、切削速度３〜５ｍ／ｍｉｎの条件で電極輪の研削・研磨実験を行った。上部電極輪１の外径Ｈが、新品時の２４０ｍｍから最大に消耗した時の２００ｍｍにまで小さくなったときの電極輪径の変化によると、角チップ１７と円形チップ２０の逃げ角度１１°が約１°変化した。本発明においては、上部電極輪１のガイド部７および傾斜部８を第１バイト装置１１ａで研削することで、常にガイド部７の表面を新品同様の基準面として確保することができる。これにより、凹み変形が生じた電極踏み面９に対して第２バイト装置１１ｂの研削位置を一定にすることができる。上記の角チップ１７と円形チップ２０の逃げ角度が１°変化しても、一定した切削量で継続的に安定した研削整形を行うことができ、ビビリの発生が減少し、溶接後のワーク外観は表面ビードのきれいな仕上がりのほか、溶接部はナゲットが連続生成され良好な溶接結果が得られた。   The pressure applied to each of the circular tip 20 and the square tips 17 and 18 with respect to the upper electrode wheel 1 is 1.2 to 1.5 kN, the amount of cutting per round is 0.015 to 0.06 mm, and the cutting speed is 3 to 5 m / min. The electrode wheel was ground and polished under the conditions. According to the change of the electrode ring diameter when the outer diameter H of the upper electrode ring 1 is reduced from 240 mm when it is new to 200 mm when it is fully consumed, the clearance angle 11 ° between the square tip 17 and the circular tip 20 is Changed about 1 °. In the present invention, by grinding the guide portion 7 and the inclined portion 8 of the upper electrode wheel 1 with the first cutting tool 11a, the surface of the guide portion 7 can always be ensured as a reference surface similar to a new one. Thereby, the grinding position of the second cutting tool device 11b can be made constant with respect to the electrode tread surface 9 in which the dent deformation has occurred. Even if the clearance angle of the square tip 17 and the circular tip 20 changes by 1 °, stable grinding and shaping can be performed continuously with a constant cutting amount, the occurrence of chatter is reduced, and the workpiece appearance after welding is reduced. In addition to the clean finish of the surface beads, nuggets were continuously generated in the weld zone, and good welding results were obtained.

これに対し、従来は、変形・劣化した電極輪の表面形状を整形バイトで修復する場合、通常、ひとつのバイトホルダに複数のチップを電極表面形状に適合させ、これらのチップを電極表面押し当てて切削整形していた。そこで、比較例として、このような一体加圧式のバイト装置を仮に適用し、角チップ１７、１８と円形チップ２０を一体にして切削整形を行った。その結果、図９に示すごとく、角チップ１７、１８と円形チップ２０との間隔を２５ｍｍに配置した場合、上部電極輪１の外径寸法が２４０ｍｍから溶接を繰り返すうち徐々に消耗して２００ｍｍの限界値まで小さくなると、角チップ１７、１８と円形チップ２０の研削時のスクイ角も次第に大きく変化し、研削精度にばらつきが生じ、研削表面にビビリが発生して溶接ビード外観の荒れや溶接部内部にも欠陥が生じることが確認された。
特に、この実験では電極輪が２００ｍｍまで磨耗したとき、円形チップ２０の先端刃先と電極踏み面９との間には略０．５ｍｍ程度の隙間が発生し、研削不能になり円形チップ２０の研削量調整が必要となった。また、円形チップ２０による研削精度が悪い場合は、研削表面のビビリの発生が多くなり、電極面の早期磨耗変形を助長し、溶接目的位置から電極輪がズレたり、溶接品質を低下することになる。角チップ１７、１８と円形チップ２０がひとつのバイトホルダに一体化されていると、円形チップ２０の研削量調整に時間を要し、生産性を低下させることとなり、実用的ではない。 On the other hand, conventionally, when repairing the deformed and deteriorated surface shape of the electrode ring with a shaping tool, usually, a plurality of tips are adapted to the electrode surface shape in one tool holder, and these tips are pressed against the electrode surface. I was cutting and shaping. Therefore, as a comparative example, such an integrated pressure type bite device was temporarily applied, and the square tips 17 and 18 and the circular tip 20 were integrated to perform cutting shaping. As a result, as shown in FIG. 9, when the spacing between the square tips 17 and 18 and the circular tip 20 is set to 25 mm, the outer diameter of the upper electrode wheel 1 gradually wears out from repeated repetitions of 240 mm and is 200 mm. When the limit value is reduced, the squeeze angle during grinding of the square tips 17 and 18 and the circular tip 20 also gradually changes, causing variations in the grinding accuracy, generating chattering on the grinding surface, roughening of the weld bead appearance, and welded parts. It was confirmed that defects also occurred inside.
In particular, in this experiment, when the electrode wheel is worn down to 200 mm, a gap of about 0.5 mm is generated between the tip edge of the circular tip 20 and the electrode tread surface 9, which makes grinding impossible and the circular tip 20 is ground. A quantity adjustment was necessary. In addition, when the grinding accuracy by the circular tip 20 is poor, chattering of the grinding surface increases, which promotes early wear deformation of the electrode surface, and the electrode wheel is displaced from the welding target position, and the welding quality is deteriorated. Become. If the square chips 17 and 18 and the circular chip 20 are integrated in one tool holder, it takes time to adjust the grinding amount of the circular chip 20 and the productivity is lowered, which is not practical.

次に、本発明の整形方法を実施するための整形バイト装置１０の動作を説明する。整形バイト装置１０の第１バイト装置１１ａにおいて、シリンダ１６のピストン運動によりフレーム１５を前進させ、上部電極輪１の内側周縁部のガイド部７にローラフォロア６を当接して電極輪径の基準位置を確定する。ローラフォロア６が当接するガイド部７の表面には角チップ１７の直線状の先端刃先が当接すると共に傾斜部８には角チップ１７と共通の第１バイトホルダ１０ａに支持された角チップ１８の直線状の先端刃先が当接する。   Next, the operation of the shaping byte apparatus 10 for carrying out the shaping method of the present invention will be described. In the first bite device 11 a of the shaping bite device 10, the frame 15 is advanced by the piston movement of the cylinder 16, and the roller follower 6 is brought into contact with the guide portion 7 on the inner peripheral edge of the upper electrode ring 1, so that the reference position of the electrode ring diameter is reached. Confirm. The linear tip edge of the square tip 17 abuts on the surface of the guide portion 7 with which the roller follower 6 abuts, and the inclined tip 8 has a square tip 18 supported by the first bit holder 10a common to the square tip 17. The straight tip edge contacts.

次いで、上部電極輪１の回転駆動により、ガイド部７の表面と傾斜部８の表面を同時に直線形に切削整形する。角チップ１７、１８の研削量調整は、第１バイト装置１１ａのマイクロメータ２１又は調整ネジの回転操作で行う。つまり、マイクロメータ２１または調整ネジを正逆方向に回転操作することにより、第１バイトホルダ１０ａが移動し、角チップ１７、１８は電極面方向に接近または離反し、それぞれの先端刃先が電極表面に対し微調整されることになる。例えば、マイクロメータ２１はその回転角に対応して１目盛り０．０１ｍｍ単位の移動量を、また調整ネジはその回転角に対応してピッチ０．１ｍｍ単位の移動量を持つように設定することができる。   Next, by rotating the upper electrode wheel 1, the surface of the guide portion 7 and the surface of the inclined portion 8 are simultaneously cut and shaped into a linear shape. The amount of grinding of the square tips 17 and 18 is adjusted by rotating the micrometer 21 or the adjusting screw of the first bite device 11a. That is, by rotating the micrometer 21 or the adjusting screw in the forward and reverse directions, the first tool holder 10a moves, the square tips 17 and 18 approach or separate from the electrode surface direction, and the respective tip blade edges are moved to the electrode surface. Will be fine-tuned. For example, the micrometer 21 is set to have a moving amount in units of 0.01 mm corresponding to the rotation angle, and the adjusting screw is set to have a moving amount in units of 0.1 mm pitch corresponding to the rotation angle. Can do.

次に、第２バイト装置１１ｂにおいて、シリンダ１６のピストン運動によりフレーム１５を前進させ、上部電極輪１の内側周縁部のガイド部７にローラフォロア６を当接して電極輪径の基準位置を確定する。これにより、円形チップ２０の曲線刃が上部電極輪１の電極踏み面９の凹状の曲面９ｂに押し当てられる。この状態で上部電極輪１を回転駆動することにより、曲面９ｂがその円周方向に研削整形される。   Next, in the second bite device 11b, the frame 15 is advanced by the piston movement of the cylinder 16, and the roller follower 6 is brought into contact with the guide portion 7 on the inner peripheral edge of the upper electrode wheel 1 to determine the reference position of the electrode wheel diameter. To do. Thereby, the curved blade of the circular tip 20 is pressed against the concave curved surface 9 b of the electrode tread surface 9 of the upper electrode wheel 1. By rotating the upper electrode wheel 1 in this state, the curved surface 9b is ground and shaped in the circumferential direction.

円形チップ２０を支持する第２バイトホルダ１０ｂは、第２バイト装置１１ｂのマイクロメータ２１の回転角に対応して移動する。この場合、例えば１目盛り０．０１ｍｍ単位でマイクロメータ２１を正方向（例えば右方向）又は逆方向（例えば左方向）に回転操作することにより、第２バイトホルダ１０ｂが電極面方向に接近または離反し、円形チップ２０の先端刃先を電極表面に対し微調整することができる。   The second tool holder 10b that supports the circular chip 20 moves corresponding to the rotation angle of the micrometer 21 of the second tool device 11b. In this case, for example, when the micrometer 21 is rotated in the forward direction (for example, the right direction) or the reverse direction (for example, the left direction) in increments of 0.01 mm, the second bit holder 10b approaches or separates in the electrode surface direction. The tip edge of the circular tip 20 can be finely adjusted with respect to the electrode surface.

天板Ｃの開口端角部Ｇをフランジ部Ｂの平坦面から湾曲面に移る曲がり際Ｒ又はその近傍に密着させ、かつ抵抗加熱により溶融部が塑性流動作用によって所望の継ぎ手厚さになるまで薄く潰しながら、マッシュシーム溶接をある期間繰り返し行うと、電極輪が次第に磨耗変形し、電極輪径が小さくなる。このため、ガイド面７と対応する角チップ１７との間及び／又は傾斜部８と対応する角チップ１８との間、さらには電極踏み面９の曲面９ｂと対応する円形チップ２０との間に僅かな隙間が発生するが、マイクロメータ２１又は調整ネジを回転操作して各チップの先端刃先をそれぞれ対応する電極表面に当接するための微調整を容易に行うことができる。   Until the opening end corner portion G of the top plate C is brought into close contact with or near the bending portion R moving from the flat surface to the curved surface of the flange portion B, and the molten portion is brought into a desired joint thickness by plastic flow action by resistance heating. When mash seam welding is repeatedly performed for a certain period while being crushed thinly, the electrode ring gradually wears and deforms, and the electrode ring diameter decreases. Therefore, between the guide surface 7 and the corresponding corner tip 17 and / or between the inclined portion 8 and the corresponding corner tip 18, and further between the curved surface 9 b of the electrode tread surface 9 and the corresponding circular tip 20. Although a slight gap occurs, fine adjustment for rotating the micrometer 21 or the adjusting screw to bring the tip edge of each tip into contact with the corresponding electrode surface can be easily performed.

この場合、上部電極輪１の逃げ角度やバリ発生を切削する直線刃形状の角チップ１７、１８による表面研削の後に、通電によって凹み変形が生じた電極踏み面９を円形チップ２０によって表面研削することができる。ガイド部７にローラフォロア６を接触させ、それによって研削基準位置を確保した後は、角チップ１７、１８と円形チップ２０のスクイ角を適時微調整することなく、電極輪径が限界まで小さくなる間の研削量を一定に確保することができ、しかも電極輪径の限界を過ぎても角チップ１７、１８及び円形チップ２０のスクイ角の調整はマイクロメータ２１または調整ネジにより簡単に行うことができる。   In this case, the surface of the electrode tread surface 9, which has been deformed by energization, is ground by the circular tip 20 after the surface grinding by the straight edge-shaped square tips 17 and 18 that cut the clearance angle and burr generation of the upper electrode wheel 1. be able to. After the roller follower 6 is brought into contact with the guide portion 7 and the grinding reference position is secured thereby, the electrode ring diameter is reduced to the limit without finely adjusting the squeeze angles of the corner tips 17 and 18 and the circular tip 20 in a timely manner. A constant grinding amount can be ensured, and the squeeze angles of the corner tips 17, 18 and the circular tip 20 can be easily adjusted by the micrometer 21 or an adjusting screw even when the limit of the electrode ring diameter is exceeded. it can.

このように、本発明によれば、電極先端の断面形状が略凹形の湾曲した電極面に発生する切削量のばらつきやビビリの発生を防止すると共に０．０１５〜０．０６ｍｍ範囲以内の研削精度の向上と溶接品質向上を図ることができ、かつ構造簡易で比較的低廉価格の整形バイト装置を実現することが可能となる。   Thus, according to the present invention, it is possible to prevent variation in the amount of cutting and chatter occurring on the curved electrode surface having a substantially concave cross-sectional shape at the electrode tip, and grinding within a range of 0.015 to 0.06 mm. It is possible to improve accuracy and weld quality, and to realize a shaping tool with a simple structure and a relatively low cost.

本発明の実施の形態は、流し台のシンクに天板を接合する際に有用なシーム電極輪とその電極輪の整形バイト方法とこれを実施するための整形バイト装置について言及したが、これに限るものではなく、本発明の電極輪を、浴槽、タンク類、パッケージ等のマッシュシーム溶接に使用することもできる。また、上記の実施の形態で述べた円形チップ及び角チップの形状、大きさ等は、これに限定されるものではなく、任意形状の電極加工面を整形するに際して、本発明の思想にかかる各請求項の技術的範囲内で適宜に設計変更が可能であることは言うまでもない。   Although the embodiment of the present invention refers to a seam electrode ring useful for joining a top plate to a sink of a sink, a shaping tool for the electrode wheel, and a shaping tool for performing the same, the present invention is not limited thereto. Instead, the electrode ring of the present invention can also be used for mash seam welding of bathtubs, tanks, packages, and the like. Further, the shape, size, etc. of the circular tip and the square tip described in the above embodiment are not limited to this, and each shape according to the idea of the present invention when shaping an electrode processing surface of an arbitrary shape. It goes without saying that the design can be changed as appropriate within the technical scope of the claims.

本発明の実施の形態に係る電極輪の先端形状を示す断面図である。It is sectional drawing which shows the front-end | tip shape of the electrode ring which concerns on embodiment of this invention. 本発明の実施の形態における上部電極輪の電極面形状と下部電極輪の先端形状を示す図である。It is a figure which shows the electrode surface shape of the upper electrode ring | wheel in embodiment of this invention, and the front-end | tip shape of a lower electrode ring | wheel. 本発明の実施の形態により接合された天板の開口端角部とシンクのフランジ部との継ぎ手溶接部を光学顕微鏡で撮影した断面写真である。It is the cross-sectional photograph which image | photographed the joint welding part of the opening edge part of the top plate joined by embodiment of this invention, and the flange part of a sink with the optical microscope. 本発明の実施の形態に係る整形バイト装置を示す正面図である。It is a front view which shows the shaping bite apparatus which concerns on embodiment of this invention. 本発明の実施の形態に係る整形バイト装置を示す側面図である。It is a side view which shows the shaping bite apparatus which concerns on embodiment of this invention. 本発明の実施の形態に係る整形バイト装置の第１バイトホルダを示す側面図である。It is a side view showing the 1st byte holder of the shaping bite device concerning an embodiment of the invention. 本発明の実施の形態に係る整形バイト装置の第２バイトホルダを示す側面図である。It is a side view showing the 2nd byte holder of the shaping bite device concerning an embodiment of the invention. 本発明の実施の形態に係る整形バイト装置の第２バイトホルダを示す正面図である。It is a front view which shows the 2nd bite holder of the shaping bite apparatus which concerns on embodiment of this invention. 本発明の実施の形態に係る整形バイト装置の角チップおよび円形チップと上部電極輪の電極面との位置関係を示す図である。It is a figure which shows the positional relationship of the square chip | tip and circular chip | tip of the shaping bite apparatus which concerns on embodiment of this invention, and the electrode surface of an upper electrode ring. 流し台の一構成例を示す平面図である。It is a top view which shows one structural example of a sink. 従来の電極輪の先端形状を示す断面図である。It is sectional drawing which shows the front-end | tip shape of the conventional electrode ring. 従来方法で接合された天板の開口端角部とシンクのフランジ部との継ぎ手溶接部を光学顕微鏡で撮影した断面写真である。It is the cross-sectional photograph which image | photographed the joint welding part of the opening edge part of the top plate joined by the conventional method, and the flange part of a sink with the optical microscope.

符号の説明Explanation of symbols

１ 上部電極輪、２ 下部電極輪、３ 平面部、４ 曲面部、５ 電極ヘッドケース、６ ローラフォロア、７ ガイド部、８ 傾斜部、９ 電極踏み面、９ａ 傾斜面、９ｂ 曲面、１０ 整形バイト装置、１０ａ 第１バイトホルダ、１０ｂ 第２バイトホルダ、１１ａ 第１バイト装置、１１ｂ 第２バイト装置、１２ ブラケット、１３ ガイドレール、１４ スライド部、１５ フレーム、１６ シリンダ、１７ 角チップ、１８ 角チップ、２０ 円形チップ、２１ マイクロメータ、２２ 円形チップ取り付け部、２３ ボルト、２４ ねじ孔、Ａ シンク、Ｂ フランジ部、Ｃ 天板、Ｄ 側板、Ｇ 開口端角部、Ｒ フランジ部の曲がり際、Ｈ 上部電極輪の内側周縁部の外径、ｈ 上部電極輪の外側周縁部の外径。   DESCRIPTION OF SYMBOLS 1 Upper electrode wheel, 2 Lower electrode wheel, 3 Plane part, 4 Curved surface part, 5 Electrode head case, 6 Roller follower, 7 Guide part, 8 Inclined part, 9 Electrode step surface, 9a Inclined surface, 9b Curved surface, 10 Shaping tool Device, 10a 1st tool holder, 10b 2nd tool holder, 11a 1st tool device, 11b 2nd tool device, 12 bracket, 13 guide rail, 14 slide part, 15 frame, 16 cylinder, 17 angle tip, 18 angle tip , 20 Circular tip, 21 micrometer, 22 Circular tip mounting part, 23 bolt, 24 screw hole, A sink, B flange part, C top plate, D side plate, G opening end corner, R flange part when bent The outer diameter of the inner peripheral edge of the upper electrode wheel, h The outer diameter of the outer peripheral edge of the upper electrode wheel.

Claims (7)

湾曲状に縁折りされたフランジ部に相手板を重ね合わせて形成された継ぎ手を一対の上部電極輪と下部電極輪によって挟み付け、そのフランジ部にそって前記継ぎ手を密着しかつ薄くして平滑に接合するマッシュシーム溶接機における前記上部電極輪および前記下部電極輪を備えるマッシュシーム溶接用電極輪において、
前記フランジ部の湾曲部側である前記フランジ部の内側に位置する前記上部電極輪の内側周縁部の外径寸法が、前記フランジ部の湾曲部と反対側である前記フランジ部の外側に位置する前記上部電極輪の外側周縁部の外径寸法より大きく形成され、
前記内側周縁部の円周方向の電極面には所定幅のローラフォロアが当接して前記上部電極輪の電極面の研削基準位置を確定するガイド部が形成され、
前記外側周縁部の円周方向の電極面には、前記フランジ部の内側から外側方向に向かって前記フランジ部から離れる方向へ傾斜した所定幅の傾斜部が形成され、
前記ガイド部と前記傾斜部との間には所定幅の傾斜した電極踏み面が円周方向に形成され、
前記電極踏み面には前記フランジ部の縁折りされた湾曲面と略同等の曲率をもつ凹状の曲面がその円周方向に形成されたマッシュシーム溶接用電極輪。 A joint formed by overlapping a mating plate on a flange that is bent in a curved shape is sandwiched between a pair of upper and lower electrode rings, and the joint is adhered and thinned along the flange part to make it smooth. Oite the electrode wheel mash seam welding with the upper electrode wheel and the lower electrode wheel definitive mash seam welding machine for joining to,
The outer diameter of the inner peripheral edge of the upper electrode wheel located inside the flange, which is the curved part of the flange , is located outside the flange, opposite to the curved part of the flange. Formed larger than the outer diameter of the outer peripheral edge of the upper electrode ring,
A guide portion is formed to determine a grinding reference position of the electrode surface of the upper electrode ring by contacting a roller follower having a predetermined width on the circumferential electrode surface of the inner peripheral edge portion,
On the electrode surface in the circumferential direction of the outer peripheral edge portion, an inclined portion having a predetermined width that is inclined in a direction away from the flange portion from the inner side to the outer side of the flange portion is formed,
Between the guide portion and the inclined portion, an inclined electrode tread surface having a predetermined width is formed in the circumferential direction,
An electrode wheel for mash seam welding in which a concave curved surface having a curvature substantially equal to the curved surface of the flange portion is formed on the electrode tread surface in the circumferential direction. 請求項１に記載のマッシュシーム溶接用電極輪の上部電極輪を研削整形するための整形バイト装置であって、
前記ローラフォロアが当接する前記ガイド部に対応する直線形刃先を有して前記上部電極輪の回転駆動により前記ガイド部の表面を円周方向に研削整形するための第１角チップと前記傾斜部に対応する傾斜させた直線形刃先を有して前記上部電極輪の回転駆動により前記傾斜部の表面を円周方向に研削整形するための第２角チップとが同一の第１バイトホルダに支持され、前記上部電極輪の回転駆動により前記電極踏み面の凹状の曲面をその円周方向に研削整形するための円形チップが前記第１バイトホルダとは分離独立した第２バイトホルダに支持されたマッシュシーム溶接用電極輪の整形バイト装置。 A shaping bite device for grinding and shaping the upper electrode ring of the electrode ring for mash seam welding according to claim 1,
A first square tip and the inclined portion having a linear cutting edge corresponding to the guide portion with which the roller follower abuts, and for grinding and shaping the surface of the guide portion in a circumferential direction by rotational driving of the upper electrode wheel And a second cutting tool for grinding and shaping the surface of the inclined portion in the circumferential direction by the rotational drive of the upper electrode wheel, and having the inclined linear cutting edge corresponding to A circular tip for grinding and shaping the concave curved surface of the electrode tread surface in the circumferential direction by the rotational drive of the upper electrode wheel is supported by a second bit holder that is separated and independent from the first bit holder. Shaping tool for electrode ring for mash seam welding. 前記第１および第２角チップと円形チップは前記上部電極輪に対してそれぞれ加圧力が与えられ、前記第１および第２角チップは前記上部電極輪の電極面中心線に対して互いに非対称的に配置された請求項２のマッシュシーム溶接用電極輪の整形バイト装置。   The first and second square tips and the circular tip are applied with pressure on the upper electrode ring, respectively, and the first and second square tips are asymmetric with respect to the electrode surface center line of the upper electrode ring. The shaping tool for the electrode ring for mash seam welding according to claim 2, which is disposed on the surface. 前記第２バイトホルダは、前記第１バイトホルダに支持された前記第１および第２角チップにより前記ガイド部と前記傾斜部を研削整形した後に前記第２バイトホルダに支持された前記円形チップが前記電極踏み面の凹状の曲面に押し当てられて前記電極踏み面の凹状の曲面を研削整形するように移動する請求項３のマッシュシーム溶接用電極輪の整形バイト装置。   The second cutting tool holder includes the circular chip supported by the second cutting tool holder after the guide part and the inclined part are ground and shaped by the first and second square chips supported by the first cutting tool holder. The shaping tool of the electrode ring for mash seam welding according to claim 3, wherein the shaping tool is moved against the concave curved surface of the electrode tread surface so as to grind and shape the concave curved surface of the electrode tread surface. 請求項１に記載のマッシュシーム溶接用電極輪の上部電極輪を研削整形するための整形バイト方法であって、
前記ガイド部に対応した直線刃を前記ガイド部の表面に幅方向に当接させて前記上部電極輪の回転駆動により前記ガイド部の表面を円周方向に研削整形する第１整形工程と、
前記傾斜部に対応した直線刃を前記傾斜部の表面に幅方向に当接させて前記上部電極輪の回転駆動により前記傾斜部の表面を円周方向に研削整形する第２整形工程と、
前記電極踏み面の凹状の曲面と略同等の曲率を有する曲線刃を前記電極踏み面の凹状の曲面に当接させて前記上部電極輪の回転駆動により該曲面を円周方向に研削整形する第３整形工程と
を含むマッシュシーム溶接用電極輪の整形バイト方法。 A shaping bite method for grinding and shaping the upper electrode ring of the electrode ring for mash seam welding according to claim 1,
A first shaping step in which a linear blade corresponding to the guide portion is brought into contact with the surface of the guide portion in the width direction, and the surface of the guide portion is ground and shaped in a circumferential direction by rotational driving of the upper electrode wheel;
A second shaping step in which a linear blade corresponding to the inclined portion is brought into contact with the surface of the inclined portion in the width direction and the surface of the inclined portion is ground and shaped in a circumferential direction by rotational driving of the upper electrode wheel;
A curved blade having substantially the same curvature as the concave curved surface of the electrode tread surface is brought into contact with the concave curved surface of the electrode tread surface, and the curved surface is ground and shaped in the circumferential direction by rotational driving of the upper electrode wheel. A shaping bite method for an electrode ring for mash seam welding, comprising three shaping steps. 前記第１整形工程と前記第２整形工程とをほぼ同時に行う請求項５のマッシュシーム溶接用電極輪の整形バイト方法。   The shaping tool method for an electrode ring for mash seam welding according to claim 5, wherein the first shaping step and the second shaping step are performed substantially simultaneously. 前記曲線刃は円形チップである請求項５又は６のマッシュシーム溶接用電極輪の整形バイト方法。   The method of shaping a mash seam welding electrode ring according to claim 5 or 6, wherein the curved blade is a circular tip.
JP2006238706A 2006-09-04 2006-09-04 Electrode wheel for mash seam welding and shaping tool and method thereof Expired - Fee Related JP4955348B2 (en)

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