133106-3 九、發明說明： 【發明所屬之技術領域】 本發明係提供一種等雷& — a ^ 又電極軋體金屬電弧銲接之方法及 其糸統，尤指其技術上提供一種 牧々决及系統，該方法133106-3 IX. Description of the invention: [Technical field to which the invention pertains] The present invention provides a method for isothermal & a ^ and electrode rolling metal arc welding and its system, in particular, a technical provision of a pasture Resolving the system, the method
及系統使用單一電源供應上下雙G AW的鋅搶同步銲接。 【先刖技術】 單一的電源供應器結合兩個鲜 奸按尾極’在1 998年有 發表一篇文章’文章中提及利用單— 早的電源供應器結合兩 個銲接電極，其中上雷炻或 電極為鶴極氬弧銲（GTAW，Gas T —n Arc Weldlng)，而下電極為電輪電極因 其沒有炼化之電極使輝接深度有限制，所以只能實施在薄 板工作物的銲接。 另者，於1 9 9 Θ年發表之文章，係 干 丨尔π用早一的電源供 應器，配合雙電極GTAW分別裝置於板件的兩側並用立 鲜的方式# 呂合金進行銲接實驗，惟其板件採用立 式之銲接，其考慮因素與平銲/仰銲並不相同。 再就開槽形式，如果單面開槽將使炫填面積大幅增加 ’不利於快速銲接’也使得填料之消耗增加，及銲接：間 加長，而如果以雙面開槽的方式，將可解決此一問題^ 熔填面積大幅減小。 是以，針對上述習知結構所存在之問題點，如何開發 一種更具理想實用性之創新結構，實消費者所殷切企盼， 亦係相關業者須努力研發突破之目標及方向。 有鑑於此，發明人本於多年從事相關產品之製造開發 5 1331063 …λ计經驗，針對上述之目標，詳加設計與審慎評估後， 終得一確具實用性之本發明。 【發明内容】 欲解決之技術問題點：習知之電極分為消耗性電極及 非消耗性電極，如氬銲及電漿銲接之電極都是屬於非消耗 性電極，所以能夠熔填的效率較差，而且習知雖有使用單 電源供應系統之雙面銲接，但其非為使用雙弧氣體金屬 極電弧銲（GMAW’Gas Metai Arc Welding)，所以工作物 厚度仍然受限。 β解决問冑之技術特,點：提供—種雙電極氣體金屬電弧 銲接之方法及其系、统’主要以單—電源供應系統供應氣體 金屬極電弧銲（GMAW)上電極及氣體金屬極電弧鮮（隱 )下電極，卫作物設有不對稱雙，銲接時氣體金屬 =弧銲（GMAW) 了電極採仰銲在前，而氣體金屬極電弧 ，GMAW )上電極採平銲在後，使仰銲先舖底，如此可得 較佳之銲道接合品質，而厚盔 …肩翻面，也只需要在後續 曰加夕道次平銲銲接即可解決。 對照先前技術之功效： 1技術有採平銲仰鮮同步者，其採用上電極為 性電：弧銲，了電極為電浆電弧電極，因兩者皆為非消耗 厚板η所以炼透深度及炫填效率受到限制，不適合用在 (二?，。而本發明之平銲仰薛均採用氣趙金屬極電弧鲜 )’屬於消耗性電極’可以 σ所 且兼顧銲接效率，而工作物可採 、好之銲道’ 竹物j採不對稱雙V型開槽，所以 6 1331063 厚板只須在銲接後增加多道次平銲銲接 板也可不用翻面之雙面銲接。 ’、，所以厚 2.先前技術之工# ^ 物採用式之雙面銲接哎雔雷炻 :為平銲之單面銲接1為兩面之受重力影響停=極 大。而本發明雙面係為—平銲而一仰銲所以兩異不 異大’與立式雙面銲接明顯不同。 者條件差 有關本發明所採用之技術、手段及其功 佳實施例並配人圖6 纸舉較 的播口圖式坪細說明於后’相信本發明上述之目 的、構造及特徵，當可由況 义之目 【實施方式】 * *具體的瞭解。 電狐銲I# ^所不’本發明係提供-種雙電極氣體金屬 ~接之方法及其系、统，所要達成其方法，穿置上至， 包含有： & 衣罝上至少 :用單一 GMAW電源供應系統（1〇)，分接到兩個送 搶 丄1)、12)’提供平銲搶體（20)及仰銲 2 1 )正極電源’銲接工作物（3 0 )則接到單一 電源供應系統（i 〇 )電源的負極，並利用氣體混 搶° ( 4 〇 )及分流閥（4 i )將混合氣體分別送至平銲 。（2 〇 )及仰銲槍體（2 1 )，以進行雙弧GMAW銲接 ，。述該銲接過程中’得藉由示波器記錄電壓脈衝頻率 敕可作為銲接電性量測的重要工具，在電壓脈衝頻率的調 疋上’可提供相當多的重要資訊。 上述該氣體可為氬氣及二氧化碳或混合氣體。 7 1331063And the system uses a single power supply to supply the upper and lower double G AW zinc grab synchronous welding. [First-in-a-kind technology] A single power supply combines two fresh stalks according to the tail-end 'In an article published in 998', mentioning the use of a single-early power supply to combine two welding electrodes, of which The crucible or the electrode is argon-arc welding (GTAW, Gas T-n Arc Weldlng), and the lower electrode is the electrode of the electric wheel. Since the electrode is not refining, the depth of the bridging is limited, so it can only be implemented in the thin plate working object. welding. In addition, the article published in the 19th year of the year, is the cognac π with the first power supply, with the two-electrode GTAW installed on both sides of the plate and using the fresh way #吕合金 for welding experiments, However, the vertical welding of the plates is not the same as the flat welding/upsizing. In the case of slotting, if the single-sided slotting will greatly increase the amount of the flushing area, it is not conducive to rapid soldering, which also increases the consumption of the filler, and the welding is lengthened, and if it is double-sided slotted, it will be solved. This problem ^ the area of the melt fill is greatly reduced. Therefore, in view of the problems existing in the above-mentioned conventional structure, how to develop an innovative structure with more ideal and practicality, the consumers are eagerly awaiting, and the relevant industry must strive to develop the goal and direction of breakthrough. In view of this, the inventor has been engaged in the manufacture and development of related products for many years. The experience of the above-mentioned objectives, after detailed design and prudent evaluation, has finally obtained the practical invention. SUMMARY OF THE INVENTION Problems to be Solved: Conventional electrodes are classified into consumable electrodes and non-consumable electrodes. For example, electrodes for argon welding and plasma welding are non-consumable electrodes, so the efficiency of filling can be poor. Moreover, although there is a double-sided welding using a single power supply system, it is not a GMAW'Gas Meta-Arc Welding, so the thickness of the workpiece is still limited. The technology of β solves the problem, the point: provide a method of two-electrode gas metal arc welding and its system, the main supply of gas metal arc welding (GMAW) upper electrode and gas metal arc Fresh (hidden) lower electrode, Weizhou crop with asymmetric double, gas metal welding = welding (GMAW), the electrode is welded in front, and gas metal arc, GMAW) The overhead welding is first laid out, so that the better weld bead joint quality can be obtained, and the thick helmet...the shoulder flip surface can only be solved after the subsequent welding. Compared with the efficacy of the prior art: 1 technology has the smoothing and welding synchronization, the upper electrode is the electric electricity: arc welding, the electrode is the plasma arc electrode, because both are non-consumed thick plates η so the penetration depth And the efficiency of the shattering is limited, and it is not suitable for use in (two?, and the flat welding of the present invention uses the gas metal arc arc fresh), which is a consumable electrode, which can be combined with the welding efficiency, and the work can be Mining, good welding road 'Bamboo material j adopts asymmetric double V-shaped slotting, so 6 1331063 thick plate only needs to add multiple passes of flat welding plate after welding or double-sided welding without turning over. ',, so thick 2. Prior art work # ^ Object-type double-sided welding 哎雔 Thunder: One-side welding for flat welding 1 is affected by gravity on both sides. Stop = extremely large. On the other hand, the double-sided welding of the present invention is - flat welding and the other is different from the vertical double-sided welding. The conditions, the techniques, the means and the functional embodiments thereof used in the present invention are described in detail in the accompanying drawings, and the above-mentioned objects, structures and features of the present invention are believed to be The purpose of the situation [Implementation] * * Specific understanding. Electric fox welding I# ^不不' The present invention provides a method for the two-electrode gas metal-to-connection method and its system, and the method to be achieved, which is put on, includes: & at least on the placket: Single GMAW power supply system (1〇), connected to two to send robbing 1), 12) 'provide flat welding (20) and overhead welding 2 1) positive power supply 'welding work (3 0) then Go to the negative pole of the power supply of the single power supply system (i 〇), and use the gas mixing (4 〇) and the diverter valve (4 i ) to send the mixed gas to the flat welding separately. (2 〇 ) and the gun body (2 1 ) for double arc GMAW welding. In the soldering process, the voltage pulse frequency can be recorded by the oscilloscope as an important tool for soldering electrical measurement, and the voltage pulse frequency can be adjusted to provide quite a lot of important information. The above gas may be argon gas and carbon dioxide or a mixed gas. 7 1331063
參閱第二圖所示，本發明 行雙1 位 係以平銲與仰銲雙搶同 4丁又弧鋅接方式，所以在 開梯<ΕΛ - 之工作物（3 〇 )鲜 開槽的k計將採用雙V的開槽 ^ α 9 ^式進仃，由於雙搶使 仏並不相同’因此開槽將加 工成上大下小的雙v形式 ra* /5角為上下開槽的角声 又’a為平銲開槽的深度 為預留未開槽的板厚部份，t為工㈣（3 〇 )板厚 參閱第三圖所示，仰薛薛道外觀的平整與溶深， 與送線速度有關外，平料冑（2㈠與仰銲槍體（ )兩弧間的距離（兩銲搶間的距離）（χ )也會影響 然平銲搶體（2 0 )在冑，可使仰銲搶體（2 "仰 深效率較好，但仰銲銲道卻有過熔低陷的問題發生， 銲搶體之下電極在前的銲接方式，無過熔低陷的問題 三圖中之銲槍銲接方向（2 2)係朝箭頭方向。 在不影響仰銲銲道外觀之條件下，將仰鮮能量增 使仰銲線徑增為〇. 9mm，以增加仰銲搶體（2 1 )下 的仰銲能力，為了先求仰銲銲冠外觀平整，當仰銲送 度設定在9 c m / s時，兩孤間距在0至2 c m間皆可形 冠外觀相當平整之銲道，此時根面深約為1 mm時，可 全嫁透之目的。另者，將送線速度增加為llcm/s，在 的根面深下也可使工作物（3 0 )全熔透，即當根面 厚則送線速度也要配合增加。或者將所有參數取其中 ，根面深減為1.5mm，仰鲜送線速度s又為l〇cm/s’及 間距設為0.5mni，也可達成全炫透之目的。 為了顧及仰銲銲道之外觀品質及增加上電極之熔 步進 接時 .用線 ，其 ，b 〇 除了 2 1 ，雖 銲熔 而仰 。第 加， 電極 線速 成銲 達到 2mm 深越 間值 兩弧 深狀 8 1331063 況，適當的雙弧銲接距離將是一個重要的變數，當進行抑 電源雙弧平/仰銲接過程中，可使用下電極在前的銲接方 式，距離間隔約在0cm〜丨cm之間，可在確保仰銲銲道外觀 品質平整及平銲熔深增加等優點τ ’使成一較佳的銲道品 質。 ^〇〇 在上電極1· 至下電極〇. 9mm線徑的搭配下，為了 確保其仰銲銲道銲冠外觀之平整，送線速度需維持在 15〇!11/5〜9〇111/3，雖然增加仰銲送線速度可達到全熔透之目 的，但銲冠將不如仰銲送線速度在9cm/s時來得平整，= 透過開槽尺寸來解決此—問冑，若要確保雙弧銲時：工二 物（3 0 )之穿透能力，根面深建議維持在i顏].間 ’較容易在確保仰銲銲冠外觀平整之條件^，形成一全炼 透之鲜道。Referring to the second figure, the double 1 position of the present invention is the same as that of the flat welding and the overhead welding, and the zinc and zinc are connected in the same way, so the freshly grooved k of the work piece (3 〇) in the opening ladder The meter will adopt the double V slotting ^ α 9 ^ type, because the double grab makes the cymbal not the same 'so the slot will be processed into the upper and lower double v form ra* /5 angle for the upper and lower slotted corner sound 'a is the depth of the flat weld groove is reserved for the unslotted plate thickness part, t is the work (four) (3 〇) plate thickness, as shown in the third figure, the appearance and depth of the appearance of the Yang Xuexue Road, and send In addition to the line speed, the distance between the two arcs of the flat material (2) and the welding gun body (the distance between the two welding grabs) (χ) will also affect the welding of the flat welding (2 0). Welding body (2 " good depth of attack, but the problem of over-welding of the overhead weld bead occurs, the welding method of the electrode in front of the welding body, no problem of over-melting and depression The welding direction of the welding torch (2 2) is in the direction of the arrow. Under the condition that the appearance of the overhead welding bead is not affected, the vertical energy is increased to increase the diameter of the overhead welding wire to 〇. 9mm to increase the overhead welding. 2 1) Under the welding ability, in order to first find the appearance of the overhead welding crown, when the overhead welding is set at 9 cm / s, the two orphan spacing between 0 and 2 cm can be a fairly flat appearance. At this time, when the root surface depth is about 1 mm, it can be fully grafted. In addition, the wire feeding speed is increased to llcm/s, and the working object (30) can be fully melted under the root surface. Through, that is, when the root surface is thick, the wire feeding speed should also be increased. Or take all the parameters, the root surface is reduced to 1.5mm, the vertical feeding speed s is l〇cm/s' and the spacing is set to 0.5. Mni, can also achieve the purpose of full sleek. In order to take into account the appearance quality of the overhead weld bead and increase the welding step of the upper electrode. Use the line, its, b 〇 except 2 1 , although the welding melts up. The electrode wire speed welding reaches 2mm deep and the value is two arcs deep 8 1331063. The proper double arc welding distance will be an important variable. When the power supply double arc flat/upward welding is performed, the lower electrode can be used. The former welding method, the distance between the distances is between 0cm and 丨cm, which can ensure the appearance quality and flat welding of the overhead weld bead. The advantage of increasing the penetration depth is τ 'to make a better weld quality. ^ 〇〇 between the upper electrode 1 · to the lower electrode 〇. 9mm wire diameter, in order to ensure the flatness of the weld bead of the overhead weld bead, send The line speed should be maintained at 15〇!11/5~9〇111/3. Although the increase of the overhead welding wire speed can achieve the purpose of full penetration, the welding crown will not be as flat as the overhead welding wire speed at 9cm/s. , = solve this by slotting size - ask, if you want to ensure double arc welding: the penetration ability of the two things (3 0), the deep root surface is recommended to maintain in the i-]. The condition of the appearance of the welded crown is flat, forming a fresh road.
參閱第四圖所示，一次雙弧同步銲後即可達到—次熔 透之銲接品質，其已驗證係為成功可行者，如第四圖之試 片斷面（5 〇 )所示’在單一電源供應系統之gmaw雙弧 銲接，除了可同時對工作物進行接合之外，並可確保其銲 道全熔透之目的。而其”槽的開槽方式結合雙弧口步 平銲/仰銲’除了可大大降低轉面積外，且在_次溶透 之優點下無須顧慮厚板炫融不良㈣接缺陷下，對於平鲜 未熔填的部份’可經由二次平銲來完&此技術不需將板 件翻面，即可完成厚板對接，在製程效率上也將大幅提升 參閱第五圖所示 該單純只作平銲之工作物（3 〇 a 9 1331063 •) ’其所需銲接的面積相當大，而以本發日, 其工作物（3 0 )銲接總面積較小，而以《 討論，只作平銲之工作物（3 0 ^ nl只往銲接方向變形，而本發明之雙弧詞 (3 0 )銲後熱變形方向n2, n3分別朝平塞 形，如此得以相互抵消而減少變形量。 參閱第六圖戶斤#，在雙弧同步銲接時， 規則的明滅交替，而此情況的發生正… 結果來說明，在雙弧銲時由於只提供單一, 電流將平分到平銲與仰#搶體電極，因此， 其電壓電流必定互相影響，從雙弧的波形量 ，其電壓波形間會呈現交替的脈衝現象（d ，當兩極的送線速度相近時，其波型也極為 一明顯的交替脈衝現象，為了更進一步了解 特性，我們將雙弧銲時量測到的波形作—討 電極送線速度的減少，其波型將有明顯的變 的週期s邊大之外，仰銲的脈衝電壓峰值時 的電壓峰值時間則有變短等現象發生，兩弧 而維持在一正常範圍内，不可差距過於極端 無法呈現穩定的脈衝波形，一旦兩弧間的脈 線速度的差異過大，而無法互相搭配時，雙 弧現象，且銲接外觀也將受到影響。 另者’將仰銲電極送線速度固定，以改 度下進行波形量測，隨著平銲電極送線速度 ί之雙弧銲接， ?後熱變形方向 1後熱變形方向 [接，其工作物 ^與仰銲方向變 其電弧光呈現 〔從波形的量測 :源供應器，其 在銲接過程中 測結果中得知 阳第六圖所示） 相似，而呈現 雙弧銲的銲接 論，隨著仰鲜 化，除了兩弧 間變長，平錦 的送線速度必 ’否則波形將 衝波形因為送 弧谷易產生斷 變平銲送線速 的減少，其平 10 1331063 銲波型將有明顯的變化，除了兩弧的週期皆變大之外 銲的脈衝電壓峰值時間變長，仰銲的電壓峰值時間不變， 但背景時間則增加。 由上述可知，任一電極在減少送線速度之影響下’皆 會影響另-電極之辉接能量分布’使整體之鮮接脈衝週期 因：？當的控制兩弧的送線速度，•是決定銲道品 質〃知接此量分布的重要因素。 ’乡示合上述’使用單一雷诉供庙么^ %席供應系統進行GMAW雙 …，證實係可行之雙-銲接，且得以藉由: ‘，舖底’使平輝更為容易，工作物不用翻面且平鏵/ 仰銲刊步（成而節省時間^為了避免仰料道因重力產 线=問題’料線徑將有所限制，仰銲線徑將 二實作得知在進行碳鋼板對接時，可視工作物厚度， 仰#電極可選用〇 ftmm η η 、… 0.6mm〜0_9mm之線徑’其送線速度不宜超 過14cm/s，否則將有烷痼姦 限制。 丨將有落廇產生，而平銲電極的線徑無此 @銲接距離，對銲道品質有相當的影響，仰銲電 :1銲銲道銲冠外觀因不受平銲電極的熱影響，益 =陷現象發生’但因為仰薛電弧力較弱，…銲電 觀平效果’其料能力較差，因此要確保銲道外 和及：：果充足，必須增加仰銲時之能量…增加線 線速度來達成，或是從開槽根面深度來解決。 來，銲接電壓波型’施銲時皆呈現一規律之脈衝波 " x錯的現象，從此m料電料行雙狐銲時 η 1331063 ’其“可規律的互相分布，而無互相干擾之情形發生。 θ在，'、、/員將厚板翻面施銲的程序下，透過雙弧GMAtt的 ^接製程設計，即可達到全炼透之目標，對於更厚之 ΰζίη ， —— , 確保第一道次全熔透之目標下，進行後續之多道 久銲接。 本發明功效增進之處如下： 1本發明雙電極氣體金屬電弧銲接之方法及其系統 • 無須將厚板翻面’銲接更快速方便。 ，2、本發明雙電極氣體金屬電弧銲接之方法及其系統 ，僅需單一電源供應系統，且雙弧銲時無相互干擾之情形 〇 3、本發明雙電極氣體金屬電弧銲接之方法及其系統 '、中該仰銲之下電極於平銲之上電極之前，使銲後良率 提升。 、别文係針對本發明之較佳實施例為本發明之技術特徵 鲁4行具體之說明；惟，熟悉此項技術之人士當可在不脫離 ^ 明之精神與原則下對本發明進行變更與修改，而該等 ^更與修改，皆應涵蓋於如下申請專利範圍所界定之範疇 中〇 【圖 第- ， 圓 · 園· 第二 :圖： 第J :圖： 苐四圖： 式簡單說明】 係本發明之其一實施例系統配置圖。 係本發明之工作物開槽狀態示意圖。 係本發明之平銲與仰銲搶體位置圖。 係本發明之其一較佳成品斷面示意圖。 12 1331063 -第五圖：係平銲及雙弧銲之銲接面積與熱變形方向示意圖 0 第六圖：係本發明雙弧鋅之電壓波形呈現交替脈衝現象圖 〇 【主要元件符號說明】 (1 0 )單一 GMAW電源供應系統 (1 1 )送線機構 (1 2 )送線機構 • ( 2 0 )平銲槍體 (2 1 )仰銲槍體 (2 2 )銲接方向 (3 0 )工作物 (3 0 a )工作物 (4 0 )氣體混合器 (4 1 )分流閥 φ ( 5 0 )試片斷面 (α )上開槽角度 (/3 )下開槽角度 (a )平銲開槽深度 (b )預留未開槽的板厚部份 (t )工作物板厚 (X )兩銲搶間的距離 (nl )熱變形方向 (η2)熱變形方向 13 1331063Referring to the fourth figure, the welding quality of the first penetration can be achieved after a double arc synchronous welding. It has been verified as a successful and feasible, as shown in the test piece (5 〇) of the fourth figure. The gmaw double-arc welding of the power supply system not only allows the workpiece to be joined at the same time, but also ensures the penetration of the weld bead. The "grooving method of the groove combined with the double arc step step welding/upsizing welding" can greatly reduce the rotating area, and under the advantage of _ times of dissolution, there is no need to worry about the poor slab fusion (four) connection defects, for the flat The freshly unfused part can be finished by secondary flat welding. This technology can complete the thick plate docking without turning the plate over, and the process efficiency will be greatly improved. The work is only used for flat welding (3 〇a 9 1331063 •) 'The area of welding required is quite large, and the total area of welding of the work (30) is smaller on the date of the present, and It is only used for flat welding work (3 0 ^ nl only deforms in the welding direction, and the double arc word (30) of the present invention has a hot deformation direction n2, n3 respectively, which are flattened, so as to cancel each other and reduce deformation. Referring to the sixth figure, it is #, in the case of double-arc synchronous welding, the regularity of the rule is alternated, and the occurrence of this situation is positive... The result shows that in the case of double arc welding, since only a single is provided, the current will be equally divided into the flat welding and Yang # grab the body electrode, therefore, its voltage and current must affect each other, from the double arc waveform The voltage waveforms will show alternating pulse phenomenon (d. When the wire feeding speeds of the two poles are similar, the waveform is also an obvious alternating pulse phenomenon. In order to further understand the characteristics, we will measure the double arc welding time. The waveform is used to reduce the wire feeding speed, and the waveform will have a significant change in the period s. The peak value of the peak voltage of the overhead welding pulse will be shorter, and the arc will occur. Maintaining in a normal range, the gap cannot be too extreme to present a stable pulse waveform. Once the difference in pulse velocity between the two arcs is too large to match each other, the double arc phenomenon and the appearance of the weld will also be affected. 'The wire feeding speed of the overhead welding electrode is fixed, and the waveform measurement is performed under the modification. With the double-arc welding of the flat welding electrode feeding speed ί, the direction of thermal deformation after the hot deformation direction 1 is followed by the work object ^ And the direction of the overhead welding becomes its arc light [from the measurement of the waveform: the source supply, which is shown in the sixth figure of the positive result in the welding process), and the welding theory of double arc welding is presented. With the increase of the temperature, in addition to the lengthening of the two arcs, the line speed of Pingjin must be 'other waveforms will be washed out. Because the arc valley is easy to produce the line speed of the broken flat welding, the flat 10 1331063 welding wave type There will be a significant change, except that the period of the two arcs becomes larger, the peak time of the pulse voltage of the welding becomes longer, the peak voltage of the overhead welding does not change, but the background time increases. From the above, any electrode is reduced. Under the influence of the line speed, 'all will affect the other-electrode's glow energy distribution', so that the overall fresh pulse period is caused by: • When controlling the wire feeding speed of the two arcs, • It is determined by the quality of the weld bead. The important factor of 'Xiangxianghe above' uses a single mine v. for the temple. ^% supply system for GMAW double..., confirmed the feasibility of double-welding, and by: ', bottoming' makes Pinghui more Easy, the work does not need to be turned over and flat / down welding steps (to save time and time ^ in order to avoid the gravity line due to gravity line = problem 'the material line diameter will be limited, the vertical welding wire diameter will be two Know that when working on carbon steel butt joints, visible work thickness , Yang # optional square electrode ftmm η η, ... 0.6mm~0_9mm diameter of 'its wire feed speed should not exceed 14cm / s, otherwise there will be limitations alkoxy inveterate rape.丨 There will be a drop, and the wire diameter of the flat welding electrode does not have this @welding distance, which has a considerable influence on the quality of the weld bead. The appearance of the weld bead is not affected by the heat of the flat welding electrode. Yi = trap phenomenon occurs 'but because the Yang Xue arc force is weak, ... welding electric leveling effect 'the material capacity is poor, so to ensure the outside of the weld bead and:: fruit is sufficient, must increase the energy of the overhead welding ... increase the line Speed is achieved, or solved from the depth of the grooved root. In the meantime, the welding voltage wave type has a regular pulse wave "x error phenomenon. Since then, the m material is double-wet welding η 1331063 'they can be regularly distributed to each other without mutual interference. The situation occurs. θ, ',, / member of the thick plate flip welding process, through the double arc GMAtt ^ process design, you can achieve the goal of full refining, for thicker ΰζ η, ——, To ensure the first pass of the full penetration, the subsequent multi-pass welding is carried out. The improvement of the invention is as follows: 1. The method and system for the two-electrode gas metal arc welding of the invention • No need to turn the thick plate The welding method is faster and more convenient. 2. The method and system for the two-electrode gas metal arc welding of the invention only need a single power supply system, and there is no mutual interference when double arc welding. 3. The two-electrode gas metal arc welding of the invention The method and system thereof, wherein the electrode under the overhead welding is used to improve the post-weld yield before the electrode is soldered to the upper electrode. The preferred embodiment of the present invention is a technical feature of the present invention. Specifically However, those skilled in the art can make changes and modifications to the present invention without departing from the spirit and principles of the present invention, and such modifications and modifications should be included in the scope defined by the following patent application scope. Figure - , Circle · Garden · Second: Figure: J: Figure: Figure 4: Brief Description of the System A system configuration diagram of an embodiment of the present invention is a schematic diagram of the slotted state of the workpiece of the present invention. The flat welding and overhead welding position map of the present invention is a schematic view of a preferred finished product of the present invention. 12 1331063 - Fifth drawing: Schematic diagram of welding area and thermal deformation direction of flat welding and double arc welding 0 Six figures: The voltage waveform of the double arc zinc of the present invention exhibits an alternating pulse phenomenon 〇 [Main component symbol description] (1 0) Single GMAW power supply system (1 1 ) Wire feeding mechanism (1 2 ) Wire feeding mechanism • ( 2 0) Flat welding gun body (2 1 ) Upright welding gun body (2 2 ) Welding direction (3 0 ) Working object (30 a) Working object (40) Gas mixer (4 1) Diverter valve φ ( 5 0 ) Slot angle (α) Slot angle (/3) Slot angle (a) Flat weld groove depth ( b) reserved unslotted plate thickness part (t) working object plate thickness (X) distance between two welding smashes (nl) hot deformation direction (η2) hot deformation direction 13 1331063