JP5927834B2 - Welding apparatus and welding method - Google Patents

Welding apparatus and welding method Download PDF

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JP5927834B2
JP5927834B2 JP2011225284A JP2011225284A JP5927834B2 JP 5927834 B2 JP5927834 B2 JP 5927834B2 JP 2011225284 A JP2011225284 A JP 2011225284A JP 2011225284 A JP2011225284 A JP 2011225284A JP 5927834 B2 JP5927834 B2 JP 5927834B2
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plating
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貴文 神宮
貴文 神宮
正範 藤井
正範 藤井
一史 森
一史 森
哲 節原
哲 節原
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JFE Steel Corp
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Description

本発明は、めっき処理された金属材同士を溶接する溶接装置および溶接方法に関するものである。   The present invention relates to a welding apparatus and a welding method for welding metal materials subjected to plating treatment.

従来から、鋼帯等の金属材を連続的に処理する連続処理ラインにおいて、処理対象の金属材同士を接続する際にシーム溶接が実施されている。シーム溶接では、一般に、連続処理ライン内に前後して搬送される複数の金属材のうちの先行する金属材(以下、先行材という)と、これに後続する金属材(以下、後行材という)とを接続するために、先行材の尾端と後行材の先端とを重ね合わせ、この重ね合わせ部分に電極輪によって圧力および電流を加えて抵抗溶接する。   Conventionally, in a continuous processing line for continuously processing a metal material such as a steel strip, seam welding has been performed when connecting metal materials to be processed. In seam welding, in general, a preceding metal material (hereinafter referred to as a preceding material) among a plurality of metal materials conveyed back and forth in a continuous processing line, and a metal material (hereinafter referred to as a following material) subsequent thereto. Are connected to each other at the tail end of the preceding material and the tip of the succeeding material, and pressure and current are applied to the overlapped portion by an electrode wheel to perform resistance welding.

このようなシーム溶接は、連続処理ライン内に所定の長さの金属材が搬入される毎に、繰り返し実施される。連続処理ライン内の先行材および後行材は、シーム溶接によって順次接続されて一体的な帯状の金属材となる。その後、この一体的な金属材には、必要な処理が連続的に実施され、最終的に、連続処理ラインによってコイル形状等に形成された鉄鋼製品が製造される。   Such seam welding is repeatedly performed every time a metal material having a predetermined length is carried into the continuous processing line. The preceding material and the succeeding material in the continuous processing line are sequentially connected by seam welding to form an integral belt-like metal material. Thereafter, necessary processing is continuously performed on the integrated metal material, and finally, a steel product formed into a coil shape or the like by a continuous processing line is manufactured.

なお、金属材同士のシーム溶接の従来技術として、金属材の重ね合わせ部分の表裏面を上下一対のローラ状研削治具によって研削し、これによって、この重ね合わせ部分の表裏面上の絶縁膜および絶縁物を除去して、これらを除去後に、この重ね合わせ部分をシーム溶接するものがある(特許文献1参照)。   In addition, as a conventional technique of seam welding between metal materials, the front and back surfaces of the overlapping portion of the metal materials are ground by a pair of upper and lower roller-shaped grinding jigs. There is a technique in which an insulator is removed, and after these are removed, the overlapped portion is seam welded (see Patent Document 1).

特開平9−239650号公報JP-A-9-239650

ところで、シーム溶接された金属材同士の溶接状態、特に、金属材同士の接合強度は、シーム溶接時に先行材と後行材との重ね合わせ部分に加える圧力および電流に依存する。すなわち、シーム溶接によって金属材同士の十分な接合強度を実現するためには、シーム溶接対象の金属材の成分および板厚に応じて、この重ね合わせ部分に与える加圧力および電流値を予め設定し、この設定した条件に基づいてシーム溶接を実行する必要がある。   By the way, the welded state between the seam-welded metal materials, in particular, the joint strength between the metal materials depends on the pressure and current applied to the overlapping portion of the preceding material and the succeeding material during seam welding. In other words, in order to achieve sufficient joint strength between metal materials by seam welding, the applied pressure and current value to be applied to this overlapping portion are set in advance according to the composition and thickness of the metal material to be seam welded. Therefore, it is necessary to perform seam welding based on the set conditions.

また、上述したシーム溶接によって接続する金属材には、例えば、ぶりきに例示されるように、その表面をめっき処理されているものもある。この場合、上述した金属材の成分および板厚に加えて、金属材表面の単位面積当たりのめっき量(以下、単にめっき量といえば、単位面積当たりのめっき材の量をいう)をシーム溶接条件の一つとして予め設定しなければならない。何故ならば、めっき処理された金属材をシーム溶接した場合、シーム溶接によって発生した熱は、金属材本体を融解する前に金属材表面のめっき材の融解に消費されるからである。   In addition, some of the metal materials to be connected by seam welding described above have their surfaces plated, as exemplified by tinplate. In this case, in addition to the above-described components and thickness of the metal material, the amount of plating per unit area on the surface of the metal material (hereinafter simply referred to as the amount of plating material per unit area) is referred to as the seam welding condition. Must be set in advance as one of the above. This is because when the plated metal material is seam welded, the heat generated by the seam welding is consumed for melting the plating material on the surface of the metal material before melting the metal material body.

しかしながら、上述しためっき量は、連続処理ラインに供給される金属材毎に異なる場合が多い。このため、順次搬入される先行材のめっき量と後行材のめっき量との組み合わせに応じて、先行材と後行材との重ね合わせ部分のめっき量がシーム溶接毎に多様に変化してしまう。この結果、シーム溶接条件としてめっき量を予め設定しても、この重ね合わせ部分における実際のめっき量がシーム溶接条件の設定範囲に比して多くなって、本来融解すべき金属材本体への入熱が不足する場合が頻発する。これに起因して、シーム溶接後の金属材同士の接合強度が不十分となることから、めっき処理された金属材同士をシーム溶接によって確実に接続することが困難であるという問題があった。   However, the above-described plating amount is often different for each metal material supplied to the continuous processing line. For this reason, depending on the combination of the plating amount of the preceding material and the plating amount of the succeeding material that are sequentially carried in, the plating amount of the overlapping portion of the preceding material and the succeeding material changes variously for each seam welding. End up. As a result, even if the plating amount is set in advance as the seam welding condition, the actual plating amount in the overlapped portion is larger than the setting range of the seam welding condition, and the metal material body to be originally melted enters the body. Frequent cases of lack of heat. Due to this, since the joint strength between the metal materials after seam welding becomes insufficient, there is a problem that it is difficult to reliably connect the plated metal materials to each other by seam welding.

なお、上述した特許文献1に記載の従来技術を用いれば、シーム溶接前に、ローラ状研削治具によって金属材表面のめっき材を予め減らすことができる。このため、上述した問題点の解消には有効である。しかし、これを実現するためには、上述したローラ状研削治具等の研削機構を既存の溶接装置に追加しなければならず、この結果、装置導入のコスト負担が増大することは勿論、装置構成が煩雑になるという問題点がある。   In addition, if the prior art described in Patent Document 1 described above is used, the plating material on the surface of the metal material can be reduced in advance by a roller-shaped grinding jig before seam welding. For this reason, it is effective in solving the above-mentioned problems. However, in order to realize this, a grinding mechanism such as the above-described roller-shaped grinding jig must be added to the existing welding apparatus, and as a result, the cost burden of introducing the apparatus increases. There is a problem that the configuration becomes complicated.

本発明は、上記の事情に鑑みてなされたものであって、たとえめっき処理された金属材であっても、簡易な装置構成によって金属材同士を確実に溶接することができる溶接装置および溶接方法を提供することを目的とする。   The present invention has been made in view of the above circumstances, and a welding apparatus and a welding method capable of reliably welding metal materials to each other with a simple device configuration even if they are plated metal materials. The purpose is to provide.

上述した課題を解決し、目的を達成するために、本発明にかかる溶接装置は、めっき処理された金属材同士を溶接する溶接装置において、互いに前後して搬送される前記金属材の先行材と後行材との重ね合わせ部分に圧力を加えつつ電流を加えて、前記先行材と前記後行材とを溶接するシーム溶接機と、前記重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、前記重ね合わせ部分に圧力を加えつつ電流を加えて、前記重ね合わせ部分内のめっき材を融解して前記重ね合わせ部分外へ押し出す溶接前処理を行うよう前記シーム溶接機を制御し、前記1パス目と同一経路の2パス目に、前記溶接前処理後の前記重ね合わせ部分に再度圧力を加えつつ電流を加えて、前記先行材と前記後行材とを溶接するよう前記シーム溶接機を制御する制御部と、を備えたことを特徴とする。 In order to solve the above-described problems and achieve the object, a welding apparatus according to the present invention is a welding apparatus that welds plated metal materials to each other. A seam welder that welds the preceding material and the succeeding material by applying a current to the overlapping portion with the succeeding material while applying pressure, and a first pass from the welding start end to the welding end of the overlapping portion in the overlay by adding a current while applying a pressure to the portion, the overlay melt the plated material within the portion controlling the seam welding machine to perform the weld prep extruding to the overlapped portion outside the The seam welding machine so as to weld the preceding material and the succeeding material by applying current to the overlapped portion after the welding pretreatment in the second pass of the same path as the first pass while applying pressure again. Control Characterized by comprising a control unit, a.

また、本発明にかかる溶接装置は、上記の発明において、制御部は、前記シーム溶接機に対し、前記1パス目に前記溶接前処理を実行する制御を行い、前記1パス目と同一経路の2パス目に前記先行材と前記後行材とを溶接する制御を行うことを特徴とする。   Further, in the welding apparatus according to the present invention, in the above invention, the control unit controls the seam welder to perform the welding pretreatment in the first pass, and has the same path as the first pass. Control for welding the preceding material and the following material is performed in the second pass.

また、本発明にかかる溶接装置は、上記の発明において、前記溶接前処理の加圧力および電流値の組み合わせ条件は、前記先行材および前記後行材の各成分、各板厚、および各めっき量に応じて設定され、前記先行材と前記後行材との溶接時の加圧力および電流値の組み合わせ条件は、前記先行材および前記後行材の各成分、各板厚、および前記溶接前処理後のめっき残量に応じて設定されることを特徴とする。   Further, in the welding apparatus according to the present invention, in the above invention, the combination conditions of the pressure and current value of the welding pretreatment are each component of the preceding material and the following material, each plate thickness, and each plating amount. The combination conditions of the applied pressure and the current value at the time of welding the preceding material and the following material are set according to each component of the preceding material and the following material, each plate thickness, and the welding pretreatment It is set according to the remaining amount of plating after.

また、本発明にかかる溶接装置は、上記の発明において、前記溶接前処理の加圧力および電流値の組み合わせ条件によって前記重ね合わせ部分に発生する抵抗熱は、前記先行材と前記後行材との溶接時の加圧力および電流値の組み合わせ条件によって前記重ね合わせ部分に発生する抵抗熱に比して高いことを特徴とする。   Further, in the welding apparatus according to the present invention, in the above invention, the resistance heat generated in the overlapping portion due to the combination condition of the pressure and current value of the welding pretreatment is generated between the preceding material and the following material. It is characterized in that it is higher than the resistance heat generated in the overlapping portion depending on the combination condition of the applied pressure and current value during welding.

また、本発明にかかる溶接装置は、上記の発明において、前記溶接前処理の加圧力および電流値は、前記先行材および前記後行材の平均板厚が0.15mm以上の場合に各々、2300N、10000Aであり、前記先行材と前記後行材との溶接時の加圧力および電流値は、めっき量が5.6g/cm2未満であって、前記平均板厚が0.15mm以上、0.25mm未満の場合に各々、2600N、6000Aであり、前記平均板厚が0.25mm以上、0.35mm未満の場合に各々、2600N、7000Aであり、前記平均板厚が0.35mm以上の場合に各々、3000N、8000Aであり、めっき量が5.6g/cm2以上であって、前記平均板厚が0.15mm以上、0.35mm未満の場合に各々、3000N、8000Aであり、前記平均板厚が0.35mm以上の場合に各々、3000N、10000Aであることを特徴とする。 Further, in the welding apparatus according to the present invention, in the above invention, the pressure and current value of the welding pretreatment are 2300 N when the average plate thickness of the preceding material and the following material is 0.15 mm or more, respectively. The applied pressure and current value during welding of the preceding material and the succeeding material are 10,000 A, the plating amount is less than 5.6 g / cm 2 , and the average plate thickness is 0.15 mm or more, 0 When the average plate thickness is less than 25 mm, 2600 N and 6000 A respectively, and when the average plate thickness is 0.25 mm or more and less than 0.35 mm, respectively, 2600 N and 7000 A, and the average plate thickness is 0.35 mm or more. Respectively, and the plating amount is 5.6 g / cm 2 or more, and the average plate thickness is 0.15 mm or more and less than 0.35 mm, respectively, 3000 N, 8000 A, respectively. When the average plate thickness is 0.35 mm or more, it is 3000 N and 10000 A, respectively.

また、本発明にかかる溶接方法は、互いに前後して搬送されるめっき処理後の金属材の先行材と後行材とを溶接する溶接方法において、前記先行材と前記後行材との重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、前記重ね合わせ部分に圧力を加えつつ電流を加えて、前記重ね合わせ部分内のめっき材を融解して前記重ね合わせ部分外へ押し出し、前記1パス目と同一経路の2パス目に、前記重ね合わせ部分に再度圧力を加えつつ電流を加えて、前記先行材と前記後行材とを溶接することを特徴とする。 Further, the welding method according to the present invention is a welding method for welding a preceding material and a succeeding material of a metal material after plating that are conveyed back and forth with each other, wherein the preceding material and the following material are superimposed. in the first pass toward the weld end from the welding start portion, the overlay added current while applying pressure to the portion extruded into the overlapped portion outside to melt the plated material of the superposed portion, the 1 In the second pass of the same path as the pass, a current is applied while applying pressure again to the overlapped portion, and the preceding material and the following material are welded.

また、本発明にかかる溶接方法は、上記の発明において、前記1パス目に前記重ね合わせ部分に圧力を加えつつ電流を加えて、前記重ね合わせ部分内のめっき材を融解して前記重ね合わせ部分外へ押し出し、前記1パス目と同一経路の2パス目に前記先行材と前記後行材とを溶接することを特徴とする。   The welding method according to the present invention is the welding method according to the above-described invention, wherein a current is applied to the overlapping portion in the first pass while applying pressure to melt the plating material in the overlapping portion. Extruding outside, welding the preceding material and the succeeding material in the second pass of the same path as the first pass.

本発明によれば、たとえめっき処理された金属材であっても、簡易な装置構成によって金属材同士を確実に溶接することができるという効果を奏する。   According to this invention, even if it is the metal material by which the plating process was carried out, there exists an effect that metal materials can be reliably welded with a simple apparatus structure.

図1は、本発明の実施の形態にかかる溶接装置の一構成例を模式的に示すブロック図である。FIG. 1 is a block diagram schematically showing a configuration example of a welding apparatus according to an embodiment of the present invention. 図2は、本発明におけるシーム溶接機の動作を側方から見た模式図である。FIG. 2 is a schematic view of the operation of the seam welder according to the present invention as seen from the side. 図3は、本発明におけるシーム溶接機の動作を上方から見た模式図である。FIG. 3 is a schematic view of the operation of the seam welder according to the present invention as viewed from above. 図4は、溶接前処理によって金属材同士の重ね合わせ部分からめっき材を押し出す状態を示す模式図である。FIG. 4 is a schematic diagram showing a state in which the plating material is pushed out from the overlapping portion of the metal materials by the welding pretreatment. 図5は、溶接前処理後の金属材同士をシーム溶接する状態を示す模式図である。FIG. 5 is a schematic diagram showing a state in which the metal materials after the welding pretreatment are seam welded together. 図6は、本発明にかかる溶接装置の実施例と比較例との比較結果を示す図である。FIG. 6 is a diagram showing a comparison result between an example of the welding apparatus according to the present invention and a comparative example. 図7は、本発明にかかる溶接装置が備えるシーム溶接機の一変形例を示す模式図である。FIG. 7 is a schematic view showing a modification of the seam welder provided in the welding apparatus according to the present invention. 図8は、本発明にかかる溶接装置が備えるシーム溶接機の別の変形例を示す模式図である。FIG. 8 is a schematic view showing another modification of the seam welder provided in the welding apparatus according to the present invention.

以下に、添付図面を参照して、本発明にかかる溶接装置および溶接方法の好適な実施の形態について詳細に説明する。なお、この実施の形態により本発明が限定されるものではない。   Hereinafter, preferred embodiments of a welding apparatus and a welding method according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment.

(実施の形態)
まず、本発明の実施の形態にかかる溶接装置の構成について説明する。図1は、本発明の実施の形態にかかる溶接装置の一構成例を模式的に示すブロック図である。本実施の形態にかかる溶接装置1は、めっき処理された金属材同士を溶接するためのものであり、図1に示すように、一対のシーム溶接機2,3と、各種情報を入力する入力部4と、金属材同士の溶接に必要な情報等を記憶する記憶部5と、溶接装置1の各構成部を制御する制御部6とを備える。
(Embodiment)
First, the structure of the welding apparatus concerning embodiment of this invention is demonstrated. FIG. 1 is a block diagram schematically showing a configuration example of a welding apparatus according to an embodiment of the present invention. A welding apparatus 1 according to the present embodiment is for welding plated metal materials to each other. As shown in FIG. 1, a pair of seam welders 2 and 3 and input for inputting various information. The unit 4 includes a storage unit 5 that stores information necessary for welding metal materials, and a control unit 6 that controls each component of the welding apparatus 1.

シーム溶接機2,3は、互いに前後して搬送される金属材の先行材15と後行材16とをシーム溶接する。具体的には、シーム溶接機2,3は、回転自在な電極輪2a,3aを各々有し、電極輪2a,3aを用いて先行材15と後行材16との重ね合わせ部分17に対して全体的に圧力を加えつつ電流を加える。これによって、シーム溶接機2,3は、この重ね合わせ部分17を溶接前処理またはシーム溶接する。なお、この溶接前処理とは、重ね合わせ部分17に圧力を加えつつ電流を加えることによって、重ね合わせ部分17内のめっき材を融解して、このめっき材を重ね合わせ部分17外へ押し出す処理である。   The seam welders 2 and 3 perform seam welding on the preceding material 15 and the succeeding material 16 that are transported back and forth with each other. Specifically, the seam welders 2 and 3 have rotatable electrode wheels 2a and 3a, respectively, and the electrode member 2a and 3a are used to overlap the overlapping portion 17 of the preceding material 15 and the succeeding material 16. Apply current while applying pressure as a whole. Accordingly, the seam welders 2 and 3 perform pre-welding or seam welding on the overlapped portion 17. The pre-welding process is a process of melting the plating material in the overlapping portion 17 by applying an electric current while applying pressure to the overlapping portion 17 and pushing the plating material out of the overlapping portion 17. is there.

ここで、先行材15および後行材16は、表面をめっき処理された帯状の金属材であり、互いに異なるコイルから搬送装置等(図示せず)によって引き出される。先行材15は、後行材16に先行して搬送され、図1に示すように搬送下流側のクランプ装置11によってクランプされる。一方、後行材16は、この先行材15に後続して搬送され、図1に示すように搬送上流側のクランプ装置12によってクランプされる。このようにクランプされた状態の先行材15および後行材16は、所定の剪断装置(図示せず)によって剪断される。これによって、先行材15の尾端15aおよび後行材16の先端16aは、整形される。その後、クランプ装置11,12は、互いに近づく方向に移動して、図1に示すように先行材15の尾端15aと後行材16の先端16aとを重ね合わせる。すなわち、上述した重ね合わせ部分17は、先行材15の尾端15aと後行材16の先端16aとをオーバーラップさせた部分である。   Here, the leading material 15 and the following material 16 are band-shaped metal materials whose surfaces are plated, and are drawn from different coils by a conveying device or the like (not shown). The preceding material 15 is conveyed prior to the succeeding material 16, and is clamped by the clamping device 11 on the downstream side of conveyance as shown in FIG. On the other hand, the succeeding material 16 is conveyed following the preceding material 15, and is clamped by the clamping device 12 on the upstream side of conveyance as shown in FIG. The preceding material 15 and the following material 16 in the clamped state are sheared by a predetermined shearing device (not shown). Thereby, the tail end 15a of the leading material 15 and the tip 16a of the following material 16 are shaped. Thereafter, the clamping devices 11 and 12 move in a direction approaching each other, and overlap the tail end 15a of the preceding material 15 and the tip 16a of the following material 16 as shown in FIG. That is, the above-described overlapping portion 17 is a portion where the tail end 15a of the preceding material 15 and the tip 16a of the following material 16 are overlapped.

入力部4は、入力キーおよびマウス等の入力デバイスを用いて実現され、作業者による入力操作に対応して制御部6に各種情報を入力する。なお、このような入力部4によって制御部6に入力される各種情報として、例えば、制御部6に対して指示する指示情報、シーム溶接機2,3による溶接前処理およびシーム溶接の各設定条件情報、搬入される先行材15および後行材16の各成分、各板厚および各めっき量の情報等が挙げられる。   The input unit 4 is realized using an input device such as an input key and a mouse, and inputs various types of information to the control unit 6 in response to an input operation by an operator. In addition, as various information input into the control part 6 by such an input part 4, each setting condition of the instruction information instruct | indicated with respect to the control part 6, the welding pre-processing by the seam welding machines 2 and 3, and seam welding, for example Information, information on each component of the leading material 15 and the following material 16 to be carried in, information on each plate thickness and each plating amount, and the like are included.

記憶部5は、EEPROMまたはハードディスク等の再書き込み可能な不揮発性の記憶媒体を用いて実現される。記憶部5は、制御部6によって書き込み指示された各種データを保存し、制御部6によって読み出し指示された保存データを制御部6に送信する。例えば、記憶部5は、上述した溶接前処理に関する前処理条件5aと、シーム溶接に関する溶接条件5bとを記憶する。   The storage unit 5 is realized using a rewritable nonvolatile storage medium such as an EEPROM or a hard disk. The storage unit 5 stores various data instructed to be written by the control unit 6 and transmits the stored data instructed to be read by the control unit 6 to the control unit 6. For example, the memory | storage part 5 memorize | stores the pre-processing conditions 5a regarding the welding pre-processing mentioned above, and the welding conditions 5b regarding seam welding.

前処理条件5aは、上述した溶接前処理の加圧力および電流値の組み合わせ条件であり、処理対象である先行材15および後行材16の各成分、各板厚、および各めっき量に応じて設定される。このような前処理条件5aは、溶接前処理において重ね合わせ部分17に加える圧力および電流値と、この重ね合わせ部分17を構成する先行材15および後行材16の各成分、各板厚、および各めっき量とを対応付けてデータテーブル化され、記憶部5に記憶される。   The pretreatment condition 5a is a combination condition of the applied pressure and current value of the welding pretreatment described above, and depends on the components, the plate thicknesses, and the plating amounts of the preceding material 15 and the following material 16 to be treated. Is set. Such pretreatment conditions 5a include the pressure and current value applied to the overlapped portion 17 in the welding pretreatment, the components of the preceding material 15 and the succeeding material 16 constituting the overlapped portion 17, the plate thicknesses, and Each plating amount is associated with each other to form a data table and stored in the storage unit 5.

溶接条件5bは、上述したシーム溶接の加圧力および電流値の組み合わせ条件であり、処理対象である先行材15および後行材16の各成分、各板厚、および溶接前処理後に重ね合わせ部分17に残っためっき量(すなわち溶接前処理後のめっき残量)に応じて設定される。このような溶接条件5bは、溶接前処理後のシーム溶接において重ね合わせ部分17に加える圧力および電流値と、この重ね合わせ部分17を構成する先行材15および後行材16の各成分、各板厚、および各めっき量とを対応付けてデータテーブル化され、記憶部5に記憶される。   The welding condition 5b is a combination condition of the pressure and current value of the seam welding described above, and each component of the preceding material 15 and the succeeding material 16 to be processed, each plate thickness, and the overlapping portion 17 after the pre-welding process. Is set according to the amount of plating remaining in the plating (that is, the remaining amount of plating after the pre-welding process). Such welding condition 5b includes the pressure and current value applied to the overlapped portion 17 in the seam welding after the welding pretreatment, the components of the preceding material 15 and the succeeding material 16 constituting the overlapped portion 17, and the plates. The thickness and each plating amount are associated with each other to form a data table and stored in the storage unit 5.

制御部6は、溶接装置1の機能を実現するためのプログラム等を記憶するメモリおよびこのメモリ内のプログラムを実行するCPU等を用いて実現される。制御部6は、溶接装置1の各構成部、具体的には、シーム溶接機2,3、入力部4、および記憶部5の各動作を制御し、且つ、これらの各構成部との電気信号の入出力を制御する。   The control unit 6 is realized using a memory for storing a program for realizing the function of the welding apparatus 1 and a CPU for executing the program in the memory. The control unit 6 controls each component of the welding apparatus 1, specifically, each operation of the seam welders 2 and 3, the input unit 4, and the storage unit 5, and performs electrical connection with these components. Controls signal input and output.

具体的には、制御部6は、入力部4によって入力された指示情報に基づいて、シーム溶接機2,3の動作タイミングを制御する。また、制御部6は、入力部4によって入力された前処理条件5aおよび溶接条件5bを記憶部5に記憶させ、必要に応じて記憶部5から前処理条件5aおよび溶接条件5bを読み出す。例えば、溶接前処理を実行するタイミングにおいて、制御部6は、記憶部5から前処理条件5aを読み出し、この前処理条件5aに示された圧力および電流を重ね合わせ部分17に加えて、この重ね合わせ部分17に対する溶接前処理を実行するようシーム溶接機2,3を制御する。一方、シーム溶接を実行するタイミングにおいて、制御部6は、記憶部5から溶接条件5bを読み出し、この溶接条件5bに示された圧力および電流を溶接前処理後の重ね合わせ部分17に加えて、この溶接前処理後の重ね合わせ部分17に対するシーム溶接を実行するようシーム溶接機2,3を制御する。   Specifically, the control unit 6 controls the operation timing of the seam welders 2 and 3 based on the instruction information input by the input unit 4. Moreover, the control part 6 memorize | stores the pre-processing conditions 5a and the welding conditions 5b input by the input part 4 in the memory | storage part 5, and reads the pre-processing conditions 5a and the welding conditions 5b from the memory | storage part 5 as needed. For example, at the timing of executing the welding pretreatment, the control unit 6 reads the pretreatment condition 5a from the storage unit 5, applies the pressure and current indicated in the pretreatment condition 5a to the superposition portion 17, and performs this superposition. The seam welders 2 and 3 are controlled to execute the pre-welding process for the mating portion 17. On the other hand, at the timing of performing seam welding, the control unit 6 reads the welding condition 5b from the storage unit 5, and applies the pressure and current indicated in the welding condition 5b to the overlapped portion 17 after the welding pretreatment, The seam welders 2 and 3 are controlled so as to perform seam welding on the overlapped portion 17 after the welding pretreatment.

つぎに、上述したシーム溶接機2,3の動作について詳細に説明する。図2は、本発明におけるシーム溶接機の動作を側方から見た模式図である。図3は、本発明におけるシーム溶接機の動作を上方から見た模式図である。なお、図2には、図1に示した方向Aから見たシーム溶接機2,3の動きを示している。また、図3には、シーム溶接機2,3の動作を説明し易くするために上方側の電極輪2aの動きを示している。   Next, the operation of the seam welders 2 and 3 will be described in detail. FIG. 2 is a schematic view of the operation of the seam welder according to the present invention as seen from the side. FIG. 3 is a schematic view of the operation of the seam welder according to the present invention as viewed from above. FIG. 2 shows the movement of the seam welders 2 and 3 as viewed from the direction A shown in FIG. FIG. 3 shows the movement of the upper electrode wheel 2a in order to facilitate the explanation of the operation of the seam welders 2 and 3.

シーム溶接機2,3は、金属材の溶接前処理またはシーム溶接を行なう際、図2に示すように、互いに協同して、先行材15の尾端15aと後行材16の先端16aとの重ね合わせ部分17を上下方向から加圧する。この場合、シーム溶接部2は、重ね合わせ部分17の上面(図2では後行材16の先端16aの上面)に電極輪2aを押し付ける。これと同時に、シーム溶接部3は、重ね合わせ部分17の下面(図2では先行材15の尾端15aの下面)に電極輪3aを押し付ける。このようにして、シーム溶接機2,3は、制御部6によって指示された加圧力を重ね合わせ部分17に加える。   When performing the pre-welding process or the seam welding of the metal material, the seam welders 2 and 3 cooperate with each other to connect the tail end 15a of the preceding material 15 and the tip 16a of the following material 16 as shown in FIG. The overlapping portion 17 is pressurized from above and below. In this case, the seam welded portion 2 presses the electrode wheel 2a against the upper surface of the overlapping portion 17 (in FIG. 2, the upper surface of the tip 16a of the trailing material 16). At the same time, the seam welded portion 3 presses the electrode ring 3a against the lower surface of the overlapping portion 17 (the lower surface of the tail end 15a of the preceding material 15 in FIG. 2). In this way, the seam welders 2 and 3 apply the applied pressure instructed by the control unit 6 to the overlapping portion 17.

また、シーム溶接機2,3は、上述したように重ね合わせ部分17を加圧しつつ電極輪2a,3aを介して重ね合わせ部分17に通電する。これによって、シーム溶接機2,3は、制御部6によって指示された電流をこの加圧状態の重ね合わせ部分17に加える。   The seam welders 2 and 3 energize the overlapped portion 17 through the electrode wheels 2a and 3a while pressurizing the overlapped portion 17 as described above. As a result, the seam welders 2 and 3 apply the current instructed by the control unit 6 to the overlapped portion 17 in the pressurized state.

上述したように重ね合わせ部分17に必要な圧力および電流を加えた状態のシーム溶接機2,3は、この加圧状態および電流印加状態を維持しつつ、図2に示すように、重ね合わせ部分17を噛み込む方向に電極輪2a,3aを回転させて、重ね合わせ部分17の幅方向に移動する。この場合、電極輪2a,3aは、重ね合わせ部分17に対して線的に接触しつつ回転する。シーム溶接機2,3は、このような動作を繰り返すことによって、最終的に、重ね合わせ部分17の溶接始端から溶接終端に向かう1パスの移動を完了する。その後、シーム溶接機2,3は、重ね合わせ部分17に対する加圧および電流印加を停止して、図2の太線矢印に示すように、溶接前処理またはシーム溶接のスタート位置に復帰する。   As described above, the seam welders 2 and 3 in a state where the necessary pressure and current are applied to the overlapping portion 17 are maintained while maintaining the pressurized state and the current application state, as shown in FIG. The electrode wheels 2 a, 3 a are rotated in the direction in which 17 is engaged, and moved in the width direction of the overlapping portion 17. In this case, the electrode wheels 2 a and 3 a rotate while being in linear contact with the overlapping portion 17. By repeating such an operation, the seam welders 2 and 3 finally complete the movement of one pass from the welding start end of the overlapping portion 17 toward the welding end. Thereafter, the seam welders 2 and 3 stop the pressurization and current application to the overlapping portion 17 and return to the welding pretreatment or seam welding start position, as indicated by the thick arrow in FIG.

ここで、電極輪2a,3aと重ね合わせ部分17との各接触部分は、図2に示すようにシーム溶接機2,3が1パスの移動を開始してから完了するまでの期間、重ね合わせ部分17の溶接始端から溶接終端に向かって連続的に変位する。例えば図3に示すように、電極輪2aが重ね合わせ部分17の幅方向へ移動した場合、電極輪2aと重ね合わせ部分17との線的な接触部分Pは、この移動に伴い、重ね合わせ部分17の溶接始端から溶接終端に向けて連続的に変位する。このことは、電極輪2aと対をなす電極輪3aについても同様である。このように、電極輪2a,3aと重ね合わせ部分17との各接触部分が、重ね合わせ部分17の溶接始端から溶接終端に向かって連続的に変位することによって、シーム溶接機2,3は、1パスの移動が完了するまでの期間、溶接前処理またはシーム溶接に適した圧力および電流を重ね合わせ部分17の全体に加えることができる。   Here, each contact portion between the electrode wheels 2a and 3a and the overlapping portion 17 is overlapped during a period from when the seam welders 2 and 3 start moving one pass to completion as shown in FIG. The portion 17 is continuously displaced from the welding start end to the welding end. For example, as shown in FIG. 3, when the electrode wheel 2 a moves in the width direction of the overlapping portion 17, the linear contact portion P between the electrode wheel 2 a and the overlapping portion 17 moves along with this movement. 17 is continuously displaced from the welding start end to the welding end. The same applies to the electrode wheel 3a that is paired with the electrode wheel 2a. Thus, each contact part of electrode wheel 2a, 3a and the superposition part 17 displaces continuously toward the welding end from the welding start end of superposition part 17, seam welding machines 2 and 3 are Pressure and current suitable for welding pretreatment or seam welding can be applied to the entire overlapping portion 17 until the movement of one pass is completed.

図1に示した制御部6は、重ね合わせ部分17の溶接始端から溶接終端に向かう1パス目に、記憶部5から読み出した前処理条件5aに示される圧力および電流を重ね合わせ部分17に加えて、上述した溶接前処理を行うようにシーム溶接機2,3を制御する。また、制御部6は、重ね合わせ部分17に対する溶接前処理が完了後、この溶接前処理後の重ね合わせ部分17に対して再度圧力を加えつつ電流を加えて、先行材15と後行材16とをシーム溶接するようにシーム溶接機2,3を制御する。例えば、制御部6は、シーム溶接機2,3に対し、上述した1パス目と同一経路の2パス目に先行材15と後行材16とをシーム溶接するように制御する。このシーム溶接の際、制御部6は、記憶部5から読み出した溶接条件5bに示される圧力および電流を重ね合わせ部分17に加えるようにシーム溶接機2,3を指示する。   The control unit 6 shown in FIG. 1 applies the pressure and current indicated by the pretreatment condition 5a read from the storage unit 5 to the overlapping portion 17 in the first pass from the welding start end to the welding end of the overlapping portion 17. Then, the seam welders 2 and 3 are controlled so as to perform the welding pretreatment described above. In addition, after the pre-welding process for the overlapped portion 17 is completed, the control unit 6 applies current to the overlapped portion 17 after the pre-welding process while applying pressure again, so that the leading material 15 and the following material 16 are applied. The seam welders 2 and 3 are controlled so as to perform seam welding. For example, the control unit 6 controls the seam welders 2 and 3 so that the preceding material 15 and the succeeding material 16 are seam welded in the second pass of the same route as the first pass. During this seam welding, the control unit 6 instructs the seam welders 2 and 3 to apply the pressure and current indicated by the welding conditions 5 b read from the storage unit 5 to the overlapping portion 17.

なお、図2,3に示す重ね合わせ部分17の幅方向は、先行材15および後行材16の幅方向であって、先行材15および後行材16の搬送方向に対して垂直な方向である。本実施の形態にかかる溶接装置1では、この幅方向を先行材15と後行材16との溶接方向と定義するが、本発明は、これに限定されるものではない。   2 and 3, the width direction of the overlapping portion 17 is the width direction of the preceding material 15 and the succeeding material 16, and is the direction perpendicular to the conveying direction of the preceding material 15 and the succeeding material 16. is there. In the welding apparatus 1 according to the present embodiment, this width direction is defined as the welding direction of the preceding material 15 and the succeeding material 16, but the present invention is not limited to this.

つぎに、シーム溶接機2,3による溶接前処理およびシーム溶接について詳細に説明する。図4は、溶接前処理によって金属材同士の重ね合わせ部分からめっき材を押し出す状態を示す模式図である。図5は、溶接前処理後の金属材同士をシーム溶接する状態を示す模式図である。以下では、まず、溶接前処理について説明し、つぎに、溶接前処理後のシーム溶接について説明する。   Next, the welding pretreatment and seam welding by the seam welders 2 and 3 will be described in detail. FIG. 4 is a schematic diagram showing a state in which the plating material is pushed out from the overlapping portion of the metal materials by the welding pretreatment. FIG. 5 is a schematic diagram showing a state in which the metal materials after the welding pretreatment are seam welded together. Below, the welding pretreatment will be described first, and then the seam welding after the welding pretreatment will be described.

先行材15と後行材16との重ね合わせ部分17に対する溶接前処理は、上述したように、シーム溶接機2,3の電極輪2a,3aを介して重ね合わせ部分17に適度な圧力および電流を加えることによって実行される。この場合、電極輪2a,3aは、図4に示すように、先行材15の尾端15aと後行材16の先端16aとの重ね合わせ部分17を上下方向から挟持しつつ、この重ね合わせ部分17に圧力および電流を加える。   As described above, the pre-welding process for the overlapping portion 17 of the preceding material 15 and the succeeding material 16 is performed with an appropriate pressure and current applied to the overlapping portion 17 via the electrode wheels 2a and 3a of the seam welders 2 and 3. It is executed by adding In this case, as shown in FIG. 4, the electrode wheels 2 a and 3 a are arranged so that the overlapping portion 17 between the tail end 15 a of the leading member 15 and the leading end 16 a of the trailing member 16 is sandwiched from above and below. Apply pressure and current to 17.

ここで、溶接前処理の際に重ね合わせ部分17に加える圧力および電流は、処理対象である先行材15および後行材16の各成分、各板厚、および各めっき量に応じて決定される。すなわち、先行材15および後行材16は、図4に示すように、鋼板等の金属材本体の表面にめっき材18を付着させたものであり、制御部6は、入力部4によって入力された先行材15および後行材16の各成分、各板厚、および各めっき量の情報を取得する。制御部6は、この取得した情報に応じて、この先行材15および後行材16の重ね合わせ部分17に加えるべき圧力および電流を前処理条件5aの中から決定する。   Here, the pressure and current applied to the overlapped portion 17 during the pre-welding process are determined in accordance with the components, the plate thicknesses, and the plating amounts of the preceding material 15 and the succeeding material 16 to be processed. . That is, as shown in FIG. 4, the leading material 15 and the succeeding material 16 are obtained by attaching a plating material 18 to the surface of a metal material body such as a steel plate. The control unit 6 is input by the input unit 4. Further, information on each component, each plate thickness, and each plating amount of the preceding material 15 and the following material 16 is acquired. The controller 6 determines the pressure and current to be applied to the overlapping portion 17 of the preceding material 15 and the succeeding material 16 from the preprocessing conditions 5a in accordance with the acquired information.

このように決定された圧力によって、電極輪2a,3aは、過度に重ね合わせ部分17を押し潰すことなく、適度に重ね合わせ部分17を押圧して、先行材15の尾端15aと後行材16の先端16aとを接触させる。また、電極輪2a,3aは、この押圧した状態の重ね合わせ部分17に対して、上述したように制御部6が決定した電流を加える。これによって、電極輪2a,3a間に、めっき材18の融解点に比して高温の抵抗熱が発生する。   By the pressure determined in this way, the electrode wheels 2a and 3a appropriately press the overlapping portion 17 without excessively crushing the overlapping portion 17, and the tail end 15a of the leading material 15 and the following material 15 The 16 tips 16a are brought into contact with each other. The electrode wheels 2a and 3a apply the current determined by the control unit 6 as described above to the overlapped portion 17 in the pressed state. As a result, high-temperature resistance heat is generated between the electrode wheels 2 a and 3 a as compared with the melting point of the plating material 18.

このような電極輪2a,3aの加圧作用と抵抗熱の作用との相乗効果によって、重ね合わせ部分17内のめっき材18は、融解するとともに、図4の実線矢印に示すように、重ね合わせ部分17の外部へ押し出される。この結果、重ね合わせ部分17におけるめっき材18の量は、加圧および電流印加前に比して減少し、特に、尾端15aと先端16aとの間におけるめっき材18の量は、先行材15と後行材16とのシーム溶接に殆ど影響しない程度に激減する。このようにして、重ね合わせ部分17に対する溶接前処理が達成される。   Due to the synergistic effect of the pressure action of the electrode wheels 2a and 3a and the action of resistance heat, the plating material 18 in the overlapped portion 17 melts and overlaps as shown by the solid line arrows in FIG. It is pushed out of the part 17. As a result, the amount of the plating material 18 in the overlapped portion 17 is reduced as compared with that before pressurization and current application. In particular, the amount of the plating material 18 between the tail end 15a and the tip 16a is the preceding material 15. And drastically reduced to such an extent that seam welding with the succeeding material 16 is hardly affected. In this way, the welding pretreatment for the overlapped portion 17 is achieved.

上述した溶接前処理が行われた重ね合わせ部分17に対しては再度、シーム溶接機2,3の電極輪2a,3aを介して適度な圧力および電流が加えられ、これによって、先行材15と後行材16とのシーム溶接が実行される。この場合、電極輪2a,3aは、図5に示すように、溶接前処理後の重ね合わせ部分17を上下方向から挟持しつつ、この溶接前処理後の重ね合わせ部分17に対して再度、圧力および電流を加える。   Appropriate pressure and current are again applied to the overlapped portion 17 subjected to the above-described welding pretreatment via the electrode wheels 2a and 3a of the seam welders 2 and 3, whereby the preceding material 15 and Seam welding with the succeeding material 16 is performed. In this case, as shown in FIG. 5, the electrode wheels 2 a and 3 a hold the overlapping portion 17 after the welding pretreatment from the vertical direction, and again press the pressure against the overlapping portion 17 after the welding pretreatment. And apply current.

ここで、シーム溶接の際に重ね合わせ部分17に加える圧力および電流は、処理対象である先行材15および後行材16の各成分、各板厚、および溶接前処理後のめっき残量に応じて決定される。すなわち、シーム溶接対象の先行材15および後行材16は、図5に示すように、溶接前処理によって重ね合わせ部分17内のめっき材18の量を減らしたものである。制御部6は、入力部4によって入力された先行材15および後行材16の各成分、各板厚、および各めっき量に応じて、溶接条件5bの中から、この溶接前処理後の重ね合わせ部分17に加えるべき圧力および電流を決定する。   Here, the pressure and current applied to the overlapped portion 17 during seam welding depend on the components of the preceding material 15 and the succeeding material 16 to be processed, the plate thicknesses, and the plating remaining amount after the welding pretreatment. Determined. That is, as shown in FIG. 5, the preceding material 15 and the succeeding material 16 to be seam welded are obtained by reducing the amount of the plating material 18 in the overlapped portion 17 by the welding pretreatment. The control unit 6 selects the overlap after the welding pretreatment from the welding conditions 5b according to the components, the plate thicknesses, and the plating amounts of the preceding material 15 and the following material 16 input by the input unit 4. The pressure and current to be applied to the mating portion 17 are determined.

なお、溶接条件5b内の加圧力および印加電流は、溶接前処理によって減少しためっき材18の残量を予め加味して設定されたものであり、データテーブル上、先行材15および後行材16の各成分、各板厚、および各めっき量と対応付けられている。   Note that the applied pressure and applied current in the welding conditions 5b are set in advance by taking into account the remaining amount of the plating material 18 that has been reduced by the welding pretreatment, and the preceding material 15 and the following material 16 on the data table. Are associated with each component, each plate thickness, and each plating amount.

上述したように決定された圧力によって、電極輪2a,3aは、溶接前処理後の重ね合わせ部分17を過度に押し潰すことなく、この重ね合わせ部分17を適度に押圧して、先行材15の尾端15aと後行材16の先端16aとを接触させる。また、電極輪2a,3aは、この押圧した状態の重ね合わせ部分17に対して、上述したように制御部6が決定した電流を加える。これによって、電極輪2a,3a間に、先行材15および後行材16の各金属材本体の融解点に比して高温の抵抗熱が発生する。   By the pressure determined as described above, the electrode wheels 2a and 3a appropriately press the overlapping portion 17 without excessively crushing the overlapping portion 17 after the pre-welding process, and The tail end 15 a and the leading end 16 a of the trailing material 16 are brought into contact with each other. The electrode wheels 2a and 3a apply the current determined by the control unit 6 as described above to the overlapped portion 17 in the pressed state. As a result, high-temperature resistance heat is generated between the electrode wheels 2a and 3a as compared with the melting point of each metal material body of the leading material 15 and the following material 16.

このような電極輪2a,3aによる再度の加圧作用と抵抗熱の作用との相乗効果によって、先行材15の尾端15aと後行材16の先端16aとは、図5に示すように、めっき材18によって阻害されることなく、互いに融解して接合する。このようにして、重ね合わせ部分17に対するシーム溶接が達成される。   As shown in FIG. 5, the tail end 15a of the leading member 15 and the tip 16a of the trailing member 16 are caused by the synergistic effect of the repressing action by the electrode wheels 2a and 3a and the action of resistance heat, as shown in FIG. They are melted and joined to each other without being obstructed by the plating material 18. In this way, seam welding to the overlapped portion 17 is achieved.

なお、シーム溶接機2,3の電極輪2a,3aの形状は、図4,5に示すように、回転軸側から外周面に向けて徐々に先細るテーパー形状であることが望ましく、さらには、この外周面の縁部は丸みを帯びていることが望ましい。このような形状にすることによって、電極輪2a,3aの押圧力を重ね合わせ部分17に対する加圧力に効率よく変換することができる。また、電極輪2a,3aの外周面の縁部に尖りがないため、重ね合わせ部分17に対して電極輪2a,3aを押し付けた際、重ね合わせ部分17を傷つけ難くなる。   The shape of the electrode wheels 2a, 3a of the seam welders 2, 3 is preferably a tapered shape that gradually tapers from the rotating shaft side toward the outer peripheral surface, as shown in FIGS. It is desirable that the edge of the outer peripheral surface is rounded. By adopting such a shape, the pressing force of the electrode wheels 2a and 3a can be efficiently converted into the pressing force on the overlapping portion 17. In addition, since the edge portions of the outer peripheral surfaces of the electrode wheels 2a and 3a are not sharp, when the electrode wheels 2a and 3a are pressed against the overlapping portion 17, the overlapping portion 17 is hardly damaged.

つぎに、上述した先行材15および後行材16の一具体例として、鋼板表面に錫めっきを処理した金属材(すなわち、ぶりき)を例示して、本発明の実施の形態にかかる溶接装置1の具体的な実施例を説明する。図6は、本発明にかかる溶接装置の実施例と比較例との比較結果を示す図である。なお、図6の上欄に示す回数(1回目、2回目)は、前後して搬送される先行のぶりきと後行のぶりきとの重ね合わせ部分がシーム溶接機2,3の電極輪2a,3a間を通板する回数であって、この重ね合わせ部分の溶接始端から溶接終端に向けて電極輪2a,3aが移動するパス数に相当する。また、以下では、先行のぶりきは先行鋼帯と称し、後行のぶりきは後行鋼帯と称する。   Next, as a specific example of the preceding material 15 and the following material 16 described above, a metal material (that is, tinplate) obtained by treating the steel sheet surface with tin plating is illustrated, and the welding apparatus according to the embodiment of the present invention is illustrated. One specific embodiment will be described. FIG. 6 is a diagram showing a comparison result between an example of the welding apparatus according to the present invention and a comparative example. In addition, the number of times shown in the upper column of FIG. 6 (first time and second time) is that the overlapping portion of the preceding and subsequent foils conveyed back and forth is the electrode wheel of the seam welders 2 and 3. This is the number of passes between 2a and 3a, and corresponds to the number of passes through which the electrode wheels 2a and 3a move from the welding start end to the welding end of this overlapped portion. In the following, the preceding tinplate is referred to as the preceding steel strip, and the trailing tinplate is referred to as the trailing steel strip.

この実施例において、溶接前処理の前処理条件5aおよびシーム溶接の溶接条件5bは、先行鋼帯および後行鋼帯の各成分(金属本体成分、めっき成分)、平均板厚、および各めっき量に応じて、以下のように設定した。   In this embodiment, the pretreatment conditions 5a for welding pretreatment and the welding conditions 5b for seam welding are as follows: each component (metal body component, plating component), average plate thickness, and each plating amount of the preceding steel strip and the subsequent steel strip. Depending on the situation, the following settings were made.

詳細には、前処理条件5aにおける加圧力および電流値は、めっき量によらず、先行鋼帯および後行鋼帯の平均板厚が0.15mm以上の場合に各々、2300N、10000Aに設定した。一方、溶接条件5bにおける加圧力および電流値は、めっき量が5.6g/cm2未満であって、この平均板厚が0.15mm以上、0.25mm未満の場合に各々、2600N、6000Aに設定し、この平均板厚が0.25mm以上、0.35mm未満の場合に各々、2600N、7000Aに設定し、この平均板厚が0.35mm以上の場合に各々、3000N、8000Aに設定した。また、溶接条件5bにおける加圧力および電流値は、めっき量が5.6g/cm2以上であって、この平均板厚が0.15mm以上、0.35mm未満の場合に各々、3000N、8000Aに設定し、この平均板厚が0.35mm以上の場合に各々、3000N、10000Aに設定した。 Specifically, the applied pressure and current value in pretreatment condition 5a were set to 2300N and 10000A, respectively, when the average thickness of the preceding steel strip and the subsequent steel strip was 0.15 mm or more, regardless of the plating amount. . On the other hand, the applied pressure and current value under welding conditions 5b are 2600 N and 6000 A, respectively, when the plating amount is less than 5.6 g / cm 2 and the average plate thickness is 0.15 mm or more and less than 0.25 mm. When the average plate thickness was 0.25 mm or more and less than 0.35 mm, it was set to 2600 N and 7000 A, respectively, and when this average plate thickness was 0.35 mm or more, it was set to 3000 N and 8000 A, respectively. Further, the welding pressure 5b and the applied pressure and current values are 3000 N and 8000 A, respectively, when the plating amount is 5.6 g / cm 2 or more and the average plate thickness is 0.15 mm or more and less than 0.35 mm. When this average plate thickness was 0.35 mm or more, it was set to 3000 N and 10000 A, respectively.

本実施の形態にかかる溶接装置1は、このように設定した前処理条件5aおよび溶接条件5bを用い、先行鋼帯および後行鋼帯の平均板厚および各めっき量別に、所定数の先行鋼帯と後行鋼帯とを溶接前処理およびシーム溶接した。詳細には、先行鋼帯と後行鋼帯との重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、前処理条件5aに示される圧力および電流をこの重ね合わせ部分に加え(1回目の加圧および電流印加)、これによって、この重ね合わせ部分内のめっき材を融解して重ね合わせ部分外へ押し出した。つぎに、この重ね合わせ部分に対して再度、溶接条件5bに示される圧力および電流を加え(2回目の加圧および電流印加)、これによって、先行鋼帯と後行鋼帯とをシーム溶接した。   The welding apparatus 1 according to the present embodiment uses the pretreatment condition 5a and the welding condition 5b set as described above, and a predetermined number of preceding steels according to the average plate thickness and each plating amount of the preceding steel strip and the following steel strip. The strip and the trailing steel strip were pre-welded and seam welded. Specifically, in the first pass from the welding start end to the welding end of the overlapped portion of the preceding steel strip and the subsequent steel strip, the pressure and current indicated in the pretreatment condition 5a are applied to the overlapped portion (first time) Thus, the plating material in the overlapped portion was melted and pushed out of the overlapped portion. Next, the pressure and current shown in the welding condition 5b are again applied to the overlapped portion (second pressurization and current application), whereby the preceding steel strip and the subsequent steel strip are seam welded. .

その後、上述した方法によってシーム溶接した後の先行鋼帯と後行鋼帯との重ね合わせ部分の接合強度をエリクセン試験(JIS Z2247)によって順次測定した。この結果、図6の○印に示すように、本実施例による先行鋼帯と後行鋼帯との重ね合わせ部分は、先行鋼帯および後行鋼帯の平均板厚および各めっき量によらず、全ての場合において溶接剥がれが発生せず、十分な接合強度を実現した。   Thereafter, the joint strength of the overlapped portion of the preceding steel strip and the subsequent steel strip after seam welding by the above-described method was sequentially measured by the Eriksen test (JIS Z2247). As a result, as shown by the circles in FIG. 6, the overlapping portion of the preceding steel strip and the succeeding steel strip according to this example depends on the average plate thickness of each of the preceding steel strip and the succeeding steel strip and the amount of each plating. In all cases, welding peeling did not occur and sufficient joint strength was achieved.

一方、上述した実施例と比較するための比較例のサンプルを溶接装置1によって製造した。なお、この比較例においては溶接前処理を行わず、1パス目にシーム溶接を実施している。この比較例におけるシーム溶接条件は、先行鋼帯および後行鋼帯の各成分(金属本体成分、めっき成分)、平均板厚、および各めっき量に応じて、以下のように設定した。   On the other hand, the sample of the comparative example for comparing with the Example mentioned above was manufactured with the welding apparatus 1. FIG. In this comparative example, the pre-welding process is not performed, and seam welding is performed in the first pass. The seam welding conditions in this comparative example were set as follows according to each component (metal body component, plating component), average plate thickness, and each plating amount of the preceding steel strip and the following steel strip.

詳細には、比較例のシーム溶接条件における加圧力および電流値は、めっき量が5.6g/cm2未満であって、先行鋼帯および後行鋼帯の平均板厚が0.15mm以上、0.35mm未満の場合に各々、3000N、8000Aに設定し、この平均板厚が0.35mm以上の場合に各々、3000N、10000Aに設定した。また、比較例のシーム溶接条件における加圧力および電流値は、めっき量が5.6g/cm2以上、且つ、この平均板厚が0.15mm以上である場合に各々、3000N、10000Aに設定した。なお、この比較例におけるシーム溶接条件は、めっき処理された金属材同士をシーム溶接する際に一般的に用いられる従来の条件である。 Specifically, the applied pressure and current value in the seam welding conditions of the comparative example are such that the plating amount is less than 5.6 g / cm 2 and the average thickness of the preceding steel strip and the subsequent steel strip is 0.15 mm or more, When the average plate thickness was 0.35 mm or more, it was set to 3000 N and 10000 A, respectively, when the thickness was less than 0.35 mm. Further, the applied pressure and current value in the seam welding conditions of the comparative example were set to 3000 N and 10000 A, respectively, when the plating amount was 5.6 g / cm 2 or more and the average plate thickness was 0.15 mm or more. . The seam welding conditions in this comparative example are conventional conditions that are generally used when seam-welding metal materials that have been plated.

なお、溶接装置1は、このように設定したシーム溶接条件を用い、先行鋼帯および後行鋼帯の平均板厚および各めっき量別に、所定数の先行鋼帯と後行鋼帯とをシーム溶接した。詳細には、比較例において、先行鋼帯と後行鋼帯との重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、めっき処理を考慮して予め設定したシーム溶接条件に示される圧力および電流をこの重ね合わせ部分に加え(1回目の加圧および電流印加)、これによって、先行鋼帯と後行鋼帯とをシーム溶接した。   In addition, the welding apparatus 1 uses the seam welding conditions set in this way, and seams a predetermined number of the preceding steel strip and the succeeding steel strip according to the average plate thickness of each of the preceding steel strip and the following steel strip and each plating amount. Welded. Specifically, in the comparative example, in the first pass from the welding start end to the welding end of the overlapped portion of the preceding steel strip and the succeeding steel strip, the pressure indicated by the seam welding conditions set in advance in consideration of the plating treatment Then, an electric current was applied to the overlapped portion (first pressurization and electric current application), whereby the preceding steel strip and the subsequent steel strip were seam welded.

その後、この比較例によるシーム溶接後の先行鋼帯と後行鋼帯との重ね合わせ部分の接合強度を、上述した実施例の場合と同様にエリクセン試験によって順次測定した。この結果、図6に示すように、比較例では、めっき量が5.6g/cm2未満の場合、先行鋼帯および後行鋼帯の平均板厚によらず、先行鋼帯と後行鋼帯との重ね合わせ部分の溶接剥がれが発生するサンプルが存在し(図6の△印参照)、めっき量が5.6g/cm2以上の場合、先行鋼帯および後行鋼帯の平均板厚によらず、全てのサンプルにおいて先行鋼帯と後行鋼帯との重ね合わせ部分の溶接剥がれが発生した(図6の×印参照)。したがって、この比較例では、先行鋼帯と後行鋼帯との重ね合わせ部分の十分な接合強度を実現できなかった。 Thereafter, the joint strength of the overlapped portion of the preceding steel strip and the succeeding steel strip after seam welding according to this comparative example was sequentially measured by the Eriksen test in the same manner as in the above-described example. As a result, as shown in FIG. 6, in the comparative example, when the plating amount is less than 5.6 g / cm 2 , the preceding steel strip and the succeeding steel are used regardless of the average thickness of the preceding steel strip and the succeeding steel strip. When there is a sample in which weld peeling occurs at the overlapping part with the strip (see Δ in FIG. 6) and the plating amount is 5.6 g / cm 2 or more, the average plate thickness of the preceding steel strip and the subsequent steel strip Regardless of this, in all the samples, welding peeling occurred at the overlapped portion of the preceding steel strip and the succeeding steel strip (see the crosses in FIG. 6). Therefore, in this comparative example, it was not possible to realize sufficient joint strength at the overlapping portion of the preceding steel strip and the succeeding steel strip.

なお、上述した実施例および比較例において、先行鋼帯および後行鋼帯の重ね合わせ部分に対する加圧力および電流印加の条件は、先行鋼帯および後行鋼帯の各めっき量に違いがある場合、めっき量の多い鋼帯側の条件に合わせた。   In the above-described examples and comparative examples, the conditions of the applied pressure and current application to the overlapping portion of the preceding steel strip and the subsequent steel strip are different in the amount of plating of the preceding steel strip and the subsequent steel strip. It was adjusted to the conditions on the steel strip side where the plating amount was large.

ここで、本比較例では、上述したように、先行鋼帯および後行鋼帯の重ね合わせ部分に対して1回(1パス目のみ)の圧力および電流の印加によって、この重ね合わせ部分をシーム溶接している。このため、たとえ1回の加圧力および印加電流を強めて、めっき処理後の鋼帯本体同士をシーム溶接しようとしても、この加圧力および印加電流によって生じる抵抗熱は、鋼帯本体に入熱する前に、めっき材の融解に消費される。これによって、鋼帯本体同士を融解して接合するに十分な熱量を処理対象の各鋼帯本体に与えることが困難となり、この結果、比較例では、先行鋼帯と後行鋼帯との接合強度が不十分となった。この現象は、図6に示すように、めっき量の増加に伴って顕著に現れる。   Here, in this comparative example, as described above, this overlapping portion is seamed by applying the pressure and current once (only in the first pass) to the overlapping portion of the preceding steel strip and the subsequent steel strip. Welding. For this reason, even if one pressurizing force and applied current are strengthened to try to seam weld the steel strip bodies after plating treatment, the resistance heat generated by the pressurizing force and applied current enters the steel strip body. Before, it is consumed to melt the plating material. As a result, it becomes difficult to give each of the steel strip bodies to be treated with a sufficient amount of heat to melt and join the steel strip bodies. As a result, in the comparative example, the joining of the preceding steel strip and the succeeding steel strip The strength was insufficient. As shown in FIG. 6, this phenomenon appears remarkably as the plating amount increases.

これに対し、本実施例では、上述したように、先行鋼帯および後行鋼帯の重ね合わせ部分に対して1回目(1パス目)の圧力および電流を加え、ついで、この重ね合わせ部分に対して再度、2回目(2パス目)の圧力および電流を加え、この2段階の加圧および電流印加によって、この重ね合わせ部分をシーム溶接している。   On the other hand, in the present embodiment, as described above, the first time (first pass) pressure and current are applied to the overlapped portion of the preceding steel strip and the subsequent steel strip, and then the overlapped portion is applied to this overlapped portion. On the other hand, the pressure and current of the second time (second pass) are applied again, and the overlapped portion is seam welded by this two-stage pressurization and current application.

このため、重ね合わせ部分に対して1パス目に加えた圧力および電流によって、先行鋼帯と後行鋼帯との重ね合わせ部分に、めっき材を融解するに十分な抵抗熱を発生させるとともに、この融解しためっき材を重ね合わせ部分外へ押し出すに十分な押圧力が発生させることができる。これら抵抗熱および押圧力の相乗作用によって、シーム溶接前に、この重ね合わせ部分内のめっき量、特に鋼帯本体間のめっき量を可能な限り低減できる。   For this reason, the pressure and current applied in the first pass with respect to the overlapped portion generate resistance heat sufficient to melt the plating material in the overlapped portion of the preceding steel strip and the subsequent steel strip, Sufficient pressing force can be generated to extrude the molten plating material out of the overlapped portion. By the synergistic action of the resistance heat and the pressing force, the amount of plating in the overlapped portion, particularly the amount of plating between the steel strip main bodies can be reduced as much as possible before seam welding.

さらに、上述したようにめっき量を低減した状態の重ね合わせ部分に対して2パス目の圧力および電流を加えることによって、めっき材の融解熱として抵抗熱を過度に消費せずに、この重ね合わせ部分の鋼帯本体へ抵抗熱を十分に入熱できる。この結果、如何なる量のめっき材が鋼帯表面に処理されていても、めっき材に阻害されることなく、先行鋼帯の尾端と後行鋼帯の先端とを容易にシーム溶接できるとともに、この先行鋼帯と後行鋼帯との十分な接合強度を実現できる。   Furthermore, as described above, by applying the pressure and current in the second pass to the overlapping portion in a state where the plating amount is reduced, the overlapping heat is not consumed excessively as the heat of fusion of the plating material. The resistance heat can be sufficiently input to the steel strip body of the part. As a result, no matter what amount of plating material is processed on the steel strip surface, the tail end of the preceding steel strip and the tip of the subsequent steel strip can be easily seam welded without being obstructed by the plating material, Sufficient joint strength between the preceding steel strip and the following steel strip can be realized.

なお、上述した実施例および比較例では、処理対象の先行材15および後行材16の一例として、ぶりきを例示したが、本発明はこれに限定されるものではない。例えば、鋼板表面に亜鉛をめっき処理したトタン等、ぶりき以外のめっき処理された金属材であっても、処理対象の金属材の成分、板厚、およびめっき量に応じて前処理条件5aおよび溶接条件5bを設定すれば、本実施例の場合と同様の作用効果を奏する。   In the above-described examples and comparative examples, tinplate is illustrated as an example of the preceding material 15 and the following material 16 to be processed, but the present invention is not limited to this. For example, even in the case of a metal material plated except for tin such as zinc plated zinc on the surface of the steel sheet, the pretreatment conditions 5a and 5a depending on the component of the metal material to be treated, the plate thickness, and the plating amount If the welding condition 5b is set, the same operational effects as in the case of the present embodiment can be obtained.

以上、説明したように、本発明の実施の形態では、互いに前後して搬送されるめっき処理後の金属材の先行材と後行材とを接合する際、この先行材と後行材との重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、この重ね合わせ部分に圧力を加えつつ電流を加えて、この重ね合わせ部分内のめっき材を融解して重ね合わせ部分外へ押し出し、この1パス目と同一経路を辿る2パス目に、この重ね合わせ部分に対し、再度圧力を加えつつ電流を加えて、この先行材と後行材とをシーム溶接している。   As described above, in the embodiment of the present invention, when joining the preceding material and the succeeding material of the metal material after the plating process which are transported back and forth with each other, In the first pass from the welding start end to the welding end of the overlapped portion, an electric current is applied while applying pressure to the overlapped portion, and the plating material in the overlapped portion is melted and pushed out of the overlapped portion. In the second pass following the same path as the first pass, current is applied to the overlapped portion while applying pressure again, and the preceding material and the following material are seam welded.

このため、上述した1パス目の加圧力および印加電流によって、先行材と後行材との重ね合わせ部分に、めっき材の融解点に比して高温な抵抗熱を確実に発生させるとともに、この融解しためっき材を重ね合わせ部分外へ押し出すに十分な押圧力を発生させ、これら抵抗熱および押圧力の相乗作用によって、シーム溶接前に、この重ね合わせ部分内のめっき量を可能な限り低減できる。特に、金属材本体間のめっき量は、めっき処理されていない金属材に限りなく近い状態まで低減できる。さらに、めっき量低減後の重ね合わせ部分に対する2パス目の加圧力および印加電流によって発生した抵抗熱を、めっき材の融解熱として過度に消費することなく、この重ね合わせ部分の金属材本体へ十分に入熱できる。   For this reason, the above-described applied pressure and applied current in the first pass surely generate a high-temperature resistance heat in the overlapping portion of the preceding material and the succeeding material as compared with the melting point of the plating material. A sufficient pressing force is generated to push the molten plating material out of the overlapped portion, and the synergistic effect of these resistance heat and pressing force can reduce the plating amount in the overlapped portion as much as possible before seam welding. . In particular, the amount of plating between metal material bodies can be reduced to a state that is almost as close as possible to a metal material that is not plated. Furthermore, the resistance heat generated by the second-pass pressure and applied current on the overlapped portion after the reduction of the plating amount is not consumed excessively as the melting heat of the plating material, and is sufficiently applied to the metal body of the overlapped portion. Heat can be input.

これによって、研削装置または手作業によって金属材表面のめっき材を削り取らなくても、既存のシーム溶接機を用いて、シーム溶接に支障の無いめっき量まで、金属材同士の重ね合わせ部分のめっき量を容易に低減できる。この結果、たとえめっき処理された金属材であっても、めっき材に阻害されず、簡易な装置構成によって手間なく、金属材同士を確実にシーム溶接することができる。   As a result, even if the plating material on the surface of the metal material is not scraped off by a grinding machine or manually, the plating amount of the overlapping parts of the metal materials is reduced to the plating amount that does not interfere with seam welding using an existing seam welding machine. Can be easily reduced. As a result, even if the metal material is plated, it is not hindered by the plating material, and the metal materials can be surely seam-welded without trouble by a simple apparatus configuration.

本発明にかかる溶接装置および溶接方法を金属材の連続処理ラインに適用すれば、連続処理ラインへ前後して搬入しためっき処理後の金属材同士を確実且つ高い接合強度にシーム溶接できる。これによって、連続処理ラインにおいて、シーム溶接後の金属材の溶接剥がれを防止でき、この結果、溶接剥がれに起因して通板が停滞する等の金属材の通板トラブルを防止できるとともに、トラブル回復に費やす処置時間を大幅に削減でき、さらには、シーム溶接後の金属材を手間なく円滑に通板できることから、この金属材を用いた鉄鋼製品の製造効率を高めることができる。   When the welding apparatus and the welding method according to the present invention are applied to a continuous treatment line for metal materials, the metal materials after plating carried in and out of the continuous treatment line can be seam welded reliably and with high joint strength. As a result, it is possible to prevent the metal material from being peeled off after seam welding in the continuous processing line. As a result, it is possible to prevent troubles in passing the metal material, such as stagnating of the metal plate due to welding peeling, and to recover from the trouble. The processing time spent on the metal can be greatly reduced, and further, the metal material after seam welding can be smoothly passed through without any trouble, so that the production efficiency of steel products using this metal material can be increased.

また、シーム溶接前に、金属材同士の重ね合わせ部分内のめっき量を低減しているため、シーム溶接後の電極輪の外周面に付着するめっき材を低減することができる。これによって、電極輪外表面に付着しためっき材の除去等のメンテナンスに費やす時間および手間を削減でき、この結果、シーム溶接後の金属材の円滑な通板を促進するとともに、鉄鋼製品の製造効率の向上を促進できる。   Moreover, since the plating amount in the overlapping portion between the metal materials is reduced before seam welding, the plating material adhering to the outer peripheral surface of the electrode ring after seam welding can be reduced. As a result, the time and labor required for maintenance such as removal of the plating material adhering to the outer surface of the electrode ring can be reduced. As a result, the smooth passage of the metal material after seam welding is promoted and the production efficiency of the steel product is increased. Can be improved.

なお、上述した実施の形態では、金属材同士の重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に溶接前処理を行い、この1パス目と同一経路の2パス目にシーム溶接を行っていたが、これに限らず、この重ね合わせ部分の溶接前処理は、シーム溶接前に完了していればよく、溶接前処理を実行するためのパス数は、1パスでなくてもよい。すなわち、この重ね合わせ部分の溶接始端から溶接終端に向かう少なくとも1パス目に溶接前処理を行えばよい。この場合、処理対象の金属材の各成分およびめっき量等に応じて、同一の重ね合わせ部分に複数回、溶接前処理を繰り返し行ってもよい。例えば、この重ね合わせ部分の1パス目から3パス目まで溶接前処理を繰り返し行い、これに続く4パス目にシーム溶接を行ってもよい。   In the above-described embodiment, welding pretreatment is performed in the first pass from the welding start end to the welding end of the overlapping portion of the metal materials, and seam welding is performed in the second pass on the same path as the first pass. However, the present invention is not limited to this, and it is sufficient that the pre-welding process for the overlapped portion is completed before the seam welding, and the number of passes for executing the pre-welding process may not be one. That is, the welding pretreatment may be performed in at least the first pass from the welding start end to the welding end of the overlapped portion. In this case, the welding pretreatment may be repeatedly performed on the same overlapping portion a plurality of times according to each component of the metal material to be treated, the plating amount, and the like. For example, the welding pretreatment may be repeatedly performed from the first pass to the third pass of the overlapped portion, and seam welding may be performed in the subsequent fourth pass.

また、上述した実施の形態では、シーム溶接機2,3の電極輪2a,3a間に金属材の重ね合わせ部分17を1パス分、通板させる場合、電極輪2a,3aによって上下方向から重ね合わせ部分17を押圧しつつ、重ね合わせ部分17の溶接始端から溶接終端に向かう方向に電極輪2a,3aを移動させ、電極輪2a,3aが溶接終端に到達した後、この重ね合わせ部分17に対する加圧を解いて溶接始点側に復帰していた(図2の太線矢印を参照)。しかし、本発明はこれに限定されるものではなく、例えば図7に示すように、重ね合わせ部分17の溶接始端と溶接終端との間を電極輪2a,3aに往復移動させてもよい。   Further, in the above-described embodiment, when the overlapping portion 17 of the metal material is passed for one pass between the electrode wheels 2a and 3a of the seam welders 2 and 3, the electrode wheels 2a and 3a are overlapped in the vertical direction. The electrode rings 2a and 3a are moved in a direction from the welding start end of the overlapping portion 17 toward the welding end while pressing the mating portion 17, and after the electrode wheels 2a and 3a reach the welding end, The pressure was released and the welding start point was restored (see thick arrow in FIG. 2). However, the present invention is not limited to this. For example, as shown in FIG. 7, the electrode wheels 2 a and 3 a may be reciprocally moved between the welding start end and the welding end of the overlapping portion 17.

図7に示すシーム溶接機2,3は、1パスの移動完了毎に電極輪2a,3aの加圧を解いて溶接終端から溶接始端側へ復帰する移動時間を省くことができる。これによって、シーム溶接機2,3の溶接前処理からシーム溶接までの一連の動作時間を短縮できる。この結果、金属材同士の接合強度を落とすことなく、短時間に効率よく金属材同士を接合できることから、連続処理ラインにおける金属材の円滑な通板を一層促進するとともに、鉄鋼製品の製造効率の向上を一層促進できる。   The seam welders 2 and 3 shown in FIG. 7 can save the movement time for releasing the pressurization of the electrode wheels 2a and 3a and returning from the welding end to the welding start end every time one pass of movement is completed. Thereby, a series of operation time from the welding pretreatment of the seam welding machines 2 and 3 to seam welding can be shortened. As a result, the metal materials can be efficiently joined in a short time without reducing the bonding strength between the metal materials, further promoting the smooth passage of the metal material in the continuous processing line, and improving the efficiency of manufacturing steel products. Improvement can be further promoted.

さらに、上述した実施の形態では、シーム溶接機2,3の各々に電極輪2a,3aを1つずつ設けていたが、これに限らず、シーム溶接機2,3は、各々複数の電極輪を備えてもよい。例えば図8に示すように、シーム溶接機2は、2つの電極輪2a,2bを備え、シーム溶接機3は、2つの電極輪3a,3bを備えてもよい。   Further, in the above-described embodiment, each of the seam welders 2 and 3 is provided with one electrode ring 2a and 3a. However, the present invention is not limited thereto, and each of the seam welders 2 and 3 includes a plurality of electrode rings. May be provided. For example, as shown in FIG. 8, the seam welder 2 may include two electrode wheels 2a and 2b, and the seam welder 3 may include two electrode wheels 3a and 3b.

図8に示すシーム溶接機2,3は、金属材の重ね合わせ部分17をその幅方向に亘って移動すれば、この重ね合わせ部分17に対して溶接前処理およびシーム溶接を短時間に続けて行うことができる。これによって、金属材同士の接合強度を落とすことなく、短時間に効率よく金属材同士を接合でき、この結果、連続処理ラインにおける金属材の円滑な通板を一層促進するとともに、鉄鋼製品の製造効率の向上を一層促進できる。なお、図8に示すシーム溶接機2,3は、図2に示した場合と同様に、1パス毎に加圧を解いて重ね合わせ部分17の溶接始端側に復帰してもよいし、図7に示した場合と同様に、重ね合わせ部分17を往復してもよい。   If the seam welders 2 and 3 shown in FIG. 8 move the overlapping portion 17 of the metal material in the width direction, the welding pretreatment and the seam welding are continuously performed on the overlapping portion 17 in a short time. It can be carried out. This makes it possible to join metal materials efficiently in a short time without reducing the bonding strength between the metal materials, and as a result, it further promotes the smooth passage of metal materials in continuous processing lines and manufactures steel products. The improvement of efficiency can be further promoted. The seam welders 2 and 3 shown in FIG. 8 may return to the welding start end side of the overlapped portion 17 by releasing the pressure for each pass, as in the case shown in FIG. Similarly to the case shown in FIG. 7, the overlapping portion 17 may be reciprocated.

また、上述した実施の形態では、金属材同士の重ね合わせ部分17の溶接始端から溶接終端に向けて溶接前処理を行っていたが、これに限らず、重ね合わせ部分17の溶接終端から溶接始端に向けて溶接前処理を行ってもよい。   Moreover, in embodiment mentioned above, although welding pre-processing was performed toward the welding end from the welding start end of the overlapping part 17 of metal materials, it is not restricted to this, The welding start end from the welding end of the overlapping part 17 The welding pretreatment may be performed toward

さらに、上述した実施の形態では、シーム溶接対象の金属材として、ぶりき、トタン等の鉄鋼材を例示していたが、これに限らず、本発明にかかる溶接装置1および溶接方法は、めっき処理された金属材の抵抗溶接であれば、鉄鋼材以外、例えば銅またはアルミニウム等の他の金属材にも適用できる。   Furthermore, in embodiment mentioned above, steel materials, such as tinplate and tin, were illustrated as a metal material of seam welding object, However, It is not restricted to this, The welding apparatus 1 and the welding method concerning this invention are plating. If it is resistance welding of the processed metal material, it can apply also to other metal materials, such as copper or aluminum other than steel materials.

また、上述した実施の形態により本発明が限定されるものではない。上述した各構成要素を適宜組み合わせて構成したものも本発明に含まれる。その他、上述した実施の形態に基づいて当業者等によりなされる他の実施の形態、実施例および運用技術等は全て本発明に含まれる。   Further, the present invention is not limited to the embodiment described above. What was comprised combining each component mentioned above suitably is also contained in this invention. In addition, all other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the above-described embodiments are included in the present invention.

1 溶接装置
2,3 シーム溶接機
2a,2b,3a,3b 電極輪
4 入力部
5 記憶部
5a 前処理条件
5b 溶接条件
6 制御部
11,12 クランプ装置
15 先行材
15a 尾端
16 後行材
16a 先端
17 重ね合わせ部分
18 めっき材
P 接触部分
DESCRIPTION OF SYMBOLS 1 Welding device 2, 3 Seam welder 2a, 2b, 3a, 3b Electrode wheel 4 Input part 5 Memory | storage part 5a Pre-processing condition 5b Welding condition 6 Control part 11,12 Clamping device 15 Leading material 15a Tail 16 Subsequent material 16a Tip 17 Overlapping part 18 Plating material P Contact part

Claims (5)

めっき処理された金属材同士を溶接する溶接装置において、
互いに前後して搬送される前記金属材の先行材と後行材との重ね合わせ部分に圧力を加えつつ電流を加えて、前記先行材と前記後行材とを溶接するシーム溶接機と、
前記重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、前記重ね合わせ部分に圧力を加えつつ電流を加えて、前記重ね合わせ部分内のめっき材を融解して前記重ね合わせ部分外へ押し出す溶接前処理を行うよう前記シーム溶接機を制御し、前記1パス目と同一経路の2パス目に、前記溶接前処理後の前記重ね合わせ部分に再度圧力を加えつつ電流を加えて、前記先行材と前記後行材とを溶接するよう前記シーム溶接機を制御する制御部と、
を備えたことを特徴とする溶接装置。
In a welding device that welds metal materials that have been plated,
A seam welding machine that welds the preceding material and the succeeding material by applying an electric current while applying pressure to the overlapping portion of the preceding material and the succeeding material of the metal material conveyed back and forth with each other;
In the first pass from the welding start end to the welding end of the overlapped portion, a current is applied while applying pressure to the overlapped portion to melt the plating material in the overlapped portion and push it out of the overlapped portion. Controlling the seam welder to perform pre-welding, applying current to the second part of the same path as the first pass while applying pressure again to the overlapped part after the pre-welding, A control unit for controlling the seam welder to weld a material and the following material;
A welding apparatus comprising:
前記溶接前処理の加圧力および電流値の組み合わせ条件は、前記先行材および前記後行材の各成分、各板厚、および各めっき量に応じて設定され、
前記先行材と前記後行材との溶接時の加圧力および電流値の組み合わせ条件は、前記先行材および前記後行材の各成分、各板厚、および前記溶接前処理後のめっき残量に応じて設定されることを特徴とする請求項に記載の溶接装置。
The combination condition of the applied pressure and current value of the welding pretreatment is set according to each component of the preceding material and the following material, each plate thickness, and each plating amount,
The combination conditions of the applied pressure and the current value at the time of welding the preceding material and the following material are the components of the preceding material and the following material, the plate thicknesses, and the plating remaining amount after the welding pretreatment. The welding apparatus according to claim 1 , wherein the welding apparatus is set accordingly.
前記溶接前処理の加圧力および電流値の組み合わせ条件によって前記重ね合わせ部分に発生する抵抗熱は、前記先行材と前記後行材との溶接時の加圧力および電流値の組み合わせ条件によって前記重ね合わせ部分に発生する抵抗熱に比して高いことを特徴とする請求項1または2に記載の溶接装置。 The resistance heat generated in the overlapping portion by the combination condition of the pressure and current value in the welding pretreatment is determined by the combination condition of the pressure and current value when welding the preceding material and the succeeding material. welding device according to claim 1 or 2, wherein the higher than the resistive heat generated in the portion. 前記溶接前処理の加圧力および電流値は、前記先行材および前記後行材の平均板厚が0.15mm以上の場合に各々、2300N、10000Aであり、
前記先行材と前記後行材との溶接時の加圧力および電流値は、めっき量が5.6g/cm2未満であって、前記平均板厚が0.15mm以上、0.25mm未満の場合に各々、2600N、6000Aであり、前記平均板厚が0.25mm以上、0.35mm未満の場合に各々、2600N、7000Aであり、前記平均板厚が0.35mm以上の場合に各々、3000N、8000Aであり、めっき量が5.6g/cm2以上であって、前記平均板厚が0.15mm以上、0.35mm未満の場合に各々、3000N、8000Aであり、前記平均板厚が0.35mm以上の場合に各々、3000N、10000Aであることを特徴とする請求項1〜のいずれか一つに記載の溶接装置。
The applied pressure and current value of the welding pretreatment are 2300 N and 10000 A, respectively, when the average plate thickness of the preceding material and the following material is 0.15 mm or more,
The applied pressure and current value during welding of the preceding material and the following material are when the plating amount is less than 5.6 g / cm 2 and the average plate thickness is 0.15 mm or more and less than 0.25 mm 2600N, 6000A, and when the average plate thickness is 0.25 mm or more and less than 0.35 mm, respectively, 2600N, 7000A, and when the average plate thickness is 0.35 mm or more, 3000N, 8000 A, when the plating amount is 5.6 g / cm 2 or more, and the average plate thickness is 0.15 mm or more and less than 0.35 mm, 3000 N and 8000 A, respectively, and the average plate thickness is 0.00. The welding apparatus according to any one of claims 1 to 3 , wherein the welding apparatus is 3000N and 10000A, respectively, in the case of 35mm or more.
互いに前後して搬送されるめっき処理後の金属材の先行材と後行材とを溶接する溶接方法において、
前記先行材と前記後行材との重ね合わせ部分の溶接始端から溶接終端に向かう1パス目に、前記重ね合わせ部分に圧力を加えつつ電流を加えて、前記重ね合わせ部分内のめっき材を融解して前記重ね合わせ部分外へ押し出し、前記1パス目と同一経路の2パス目に、前記重ね合わせ部分に再度圧力を加えつつ電流を加えて、前記先行材と前記後行材とを溶接することを特徴とする溶接方法。
In the welding method of welding the preceding material and the succeeding material of the metal material after the plating process conveyed back and forth with each other,
In the first pass from the welding start end to the welding end of the overlapping portion of the preceding material and the succeeding material, current is applied while applying pressure to the overlapping portion to melt the plating material in the overlapping portion. Then, the material is pushed out of the overlapped portion, and in the second pass of the same path as the first pass, a current is applied to the overlapped portion while applying pressure again to weld the preceding material and the following material. A welding method characterized by the above.
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