JPH01299768A - Consumable electrode type rectangular wave ac arc welding method - Google Patents
Consumable electrode type rectangular wave ac arc welding methodInfo
- Publication number
- JPH01299768A JPH01299768A JP12639088A JP12639088A JPH01299768A JP H01299768 A JPH01299768 A JP H01299768A JP 12639088 A JP12639088 A JP 12639088A JP 12639088 A JP12639088 A JP 12639088A JP H01299768 A JPH01299768 A JP H01299768A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- welding
- electrode
- short
- short circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims description 22
- 239000010953 base metal Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000016507 interphase Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003359 percent control normalization Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は矩形波交流を用いた消耗電極式アーク溶接法に
係り、特に溶接中において消耗電極と母材間の短絡時の
溶接方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a consumable electrode type arc welding method using square wave alternating current, and particularly to a welding method when a short circuit occurs between a consumable electrode and a base metal during welding.
従来の技術
一般に交流を用いたアーク溶接は、被覆アーク溶接法、
潜弧溶接法あるいはガスアーク溶接法の一部に用いられ
ており、数々の利点を有することは公知の事実である。Conventional technology Generally speaking, arc welding using alternating current includes shielded arc welding,
It is a well-known fact that it is used as a part of submerged arc welding or gas arc welding, and has many advantages.
第４図は直流における従来からのｆｆｌ流制御の無い場
合の溶接電圧、溶接電流波形を表す、該図中３２は消耗
電極と母材で短絡を生じた時であり、その後３３まで短
絡電流が流れる。３３の時点においてヒユーズ効果によ
り短絡は解除されるが、この時に再点弧したアーク力に
より溶滴が吹き飛ばされたり、溶融池内の溶融金属が弾
き飛ばされることにより、大粒で多酸のスパッタが発生
飛散する。Figure 4 shows the welding voltage and welding current waveforms when there is no conventional ffl flow control in direct current. In the figure, 32 is the time when a short circuit occurs between the consumable electrode and the base metal, and the short circuit current continues until 33. flows. At point 33, the short circuit is released due to the fuse effect, but at this time, the re-ignited arc force blows off the droplets and the molten metal in the molten pool, causing large multi-acid spatter. scatter.
その後再点弧したアークにより溶接が実施される。Welding is then carried out using the re-ignited arc.
また一般の交流溶接機では溶接電流短絡時における電流
波形制御はなされておらず、短絡時における電流値は短
絡と同時に上昇し、消耗電極は短絡電流により加熱され
、その後融点まで加熱されるとヒユーズ効果により短絡
が解除される。短絡が解除されると同時にアーク放電が
開始され、その時に溶融した消耗電極の溶滴が母材に移
行する時にアークのエネルギーにより大粒のスパッタが
大量に飛散する。Furthermore, in general AC welding machines, there is no current waveform control when the welding current is short-circuited, and the current value at the time of a short-circuit increases at the same time as the short-circuit, and the consumable electrode is heated by the short-circuit current, and then when it is heated to the melting point, the fuse The effect removes the short circuit. At the same time as the short circuit is released, arc discharge starts, and when the melted consumable electrode droplets transfer to the base material, the energy of the arc scatters a large amount of large spatter.
大量に発生するスパッタは溶着効率を悪化させるばかり
ではなく、溶接作業性そのものを悪化させ、さらには溶
接品質についても悪化させる。そればかりではなく、ガ
スシールド溶接では溶接ノズル周囲に付着したスパッタ
は成長し、やがてはシールドガスの噴出口をふさいでし
まい、シールドが不完全となるため溶接欠陥を誘発する
に至る。あるいは溶接後のスパッタ除去に多大な時間を
費やすと言う問題を有することは既に知られているとこ
ろである。Spatter generated in large quantities not only deteriorates welding efficiency, but also deteriorates welding workability itself, and furthermore deteriorates welding quality. Not only that, but in gas shield welding, spatter deposited around the welding nozzle grows and eventually blocks the shielding gas outlet, resulting in incomplete shielding and welding defects. Alternatively, it is already known that there is a problem in that it takes a lot of time to remove spatter after welding.
従来からはスパッタを少なくする方法として、パルス電
圧を印加してｌパルスで１溶滴移行を制御することが実
施されていた。しかるに該方法ではパルス周波数が何等
かの原因で微小変化すると、溶滴移行とパルス周波数が
同期しなくなりスパッタ発生量は多くなる。また消耗電
極即ち溶接ワイヤ成分によって溶融温度、溶融金属の表
面張力、粘性などが異なるために溶滴移行の周期とパル
ス周波数が同期しなくなるため、やはり多驕のスパッタ
が発生していた。Conventionally, as a method of reducing spatter, it has been practiced to apply a pulse voltage and control the transfer of one droplet with one pulse. However, in this method, if the pulse frequency changes slightly for some reason, the droplet transfer and the pulse frequency become out of synchronization, and the amount of spatter generated increases. Furthermore, because the melting temperature, surface tension, viscosity, etc. of the molten metal differ depending on the components of the consumable electrode, that is, the welding wire, the cycle of droplet transfer and the pulse frequency are not synchronized, resulting in large amounts of spatter.
そこで本発明者等は特開昭８３−２０１８８号あるいは
特願昭８２−２８９０７１号に記載の発明を発明した。Therefore, the present inventors invented the invention described in Japanese Patent Application Laid-Open No. 83-20188 or Japanese Patent Application No. 82-289071.
該発明によればスパッタ発生量は少なく、更に交流を用
いているので電極０時と電極０時の時間比率を可変する
ことで溶は込み深さ制御することができ、さらに溶接金
属中の酸素あるいは窒素の含有ｊｌｌを低減させる効果
により、溶接金属の機械的性能を向」二させる利点を有
し、非常に工業的に価値の高い溶接方法であるが、該方
法でも電極母材間短絡を発生するような低電流域ではど
うしてもスパッタ発生音が多くなりがちとなり、該スパ
ッタ発生量は電極母材間の短絡回数により比例して多く
なっていた。According to this invention, the amount of spatter generated is small, and since alternating current is used, the penetration depth can be controlled by varying the time ratio between electrode 0 and electrode 0, and further, the oxygen in the weld metal can be controlled. Alternatively, this welding method has the advantage of improving the mechanical performance of the weld metal due to the effect of reducing nitrogen content, and is of great industrial value, but this method also prevents short circuits between electrode base materials. In such a low current range, spatter noise tends to increase, and the amount of spatter generated increases in proportion to the number of short circuits between the electrode base materials.
発明が解決しようとする課題
本発明はこれらの点に鑑みなされたものであって、矩形
波交流を用いた消耗電極式アーク溶接法において、該消
耗電極と母材間短絡を検出し、該′Ｍｌ絡時開時間さに
よって消耗電極と母材間の極性および短絡電流値の制限
を実施することでスパッタ発生にを少なくし、健全かつ
高品位の溶接継ぎｆを作製する溶接電波制御方法を提供
するものである。Problems to be Solved by the Invention The present invention has been made in view of these points, and it detects short circuits between the consumable electrode and the base material in a consumable electrode type arc welding method using square wave alternating current, and Provides a welding radio wave control method that reduces the occurrence of spatter and creates a sound and high-quality weld seam f by limiting the polarity and short-circuit current value between the consumable electrode and the base metal depending on the open time when Ml is shorted. It is something to do.
課題を解決するための手段
即ち本発明の要旨は消耗電極とけ材間の短絡を検１１シ
、該短絡時間があらかじめ設定した既存設定時間よりも
長い場合に限り、
（１）短絡時の極性を保ち、その時の短絡電流値を設定
溶接電流値より低いイ１に移行させ、短絡が解除した事
を検出した直後に設定溶接電流値に復帰させる事を特徴
とする消耗電極式矩形波交流アーク溶接方法と。A means for solving the problem, that is, the gist of the present invention is to detect a short circuit between the consumable electrode and the holder, and only if the short circuit time is longer than the existing preset time, (1) change the polarity at the time of the short circuit. consumable electrode type rectangular wave alternating current arc welding, characterized in that the short circuit current value at that time is shifted to A1, which is lower than the set welding current value, and the short circuit current value is returned to the set welding current value immediately after detecting that the short circuit is released. With the method.
（２）電極負極短絡時には極性を電極正極に転極し、電
極正極短絡時間には極性を保ち、かつその時の短絡電流
値を設定溶接電波値より低い値に移行させ、短絡が解除
した事を検出した直後に設定溶接電流値に復帰させる事
を特徴とする消耗電極式矩形波交流アーク溶接方法にあ
る。(2) When the electrode negative electrode is short-circuited, the polarity is reversed to the electrode positive electrode, and the polarity is maintained during the electrode positive electrode short-circuit time, and the short-circuit current value at that time is shifted to a value lower than the set welding radio wave value, and the short circuit is released. A consumable electrode rectangular wave alternating current arc welding method characterized by returning to a set welding current value immediately after detection.
作用 以下、図面を用い本発明の詳細な説明する。action Hereinafter, the present invention will be explained in detail using the drawings.
第１図は本発明を一態様で実施する非消耗電極式アーク
溶接機の構成を示すブロックダイヤグラムであるが、該
図中入力された３相交流は１次側整流回路１により直流
に整流され１次側インバータ回路２に印加される。該１
次側インバータ回路は電流設定回路６により設定電流に
見合う信号により駆動され、出力は高周波の交流になり
変圧器３に入力される。該変圧器の出力は溶接用レベル
の交流を出力するが、２次側整流回路４により直流に変
換した後、２次側インバータ回路５に印加される。FIG. 1 is a block diagram showing the configuration of a non-consumable electrode type arc welding machine embodying the present invention in one embodiment. In the figure, input three-phase alternating current is rectified into direct current by a primary side rectifier circuit 1. It is applied to the primary side inverter circuit 2. Part 1
The next inverter circuit is driven by the current setting circuit 6 with a signal corresponding to the set current, and the output becomes a high frequency alternating current and is input to the transformer 3. The output of the transformer is an alternating current of a welding level, which is converted into direct current by the secondary rectifier circuit 4 and then applied to the secondary inverter circuit 5.
この時発信回路ｌＯにより発信された交流信号は、正極
負極比調整回路９によって電極正極、電極負極時間比率
を設定し、相間短絡防止回路８によって、転極時のトラ
ンジスタの相間短絡を防止するため、信号０レベルのご
くわずかな時間を設定した信号で、該前置増幅器７によ
って２次側インバータ回路５の駆動に必要なレベルまで
増幅され、２次側インバータ５に印加される。そこで前
述印加された２次側整流回路４からの直流を前置増幅器
７からの信号で矩形波交流に変換し、消耗電極と母材間
に該交流を印加することで溶接が実施される。At this time, the alternating current signal transmitted by the transmitting circuit IO is used to set the electrode positive electrode and electrode negative electrode time ratio by the positive electrode negative electrode ratio adjustment circuit 9, and by the interphase short circuit prevention circuit 8 to prevent the interphase short circuit of the transistor at the time of polarity reversal. , which is a signal set for a very short period of time at the signal 0 level, is amplified by the preamplifier 7 to a level necessary for driving the secondary inverter circuit 5, and is applied to the secondary inverter 5. Therefore, welding is performed by converting the previously applied DC from the secondary rectifier circuit 4 into a rectangular wave AC using a signal from the preamplifier 7, and applying the AC between the consumable electrode and the base metal.
ここで溶接中の溶接電流、溶接電圧は常に溶接電圧検出
回路１２及び溶接電流検出回路１１によって監視されて
おり、溶接中に短絡が発生し短絡電流が流れ溶接電圧が
短絡により降下することにより、短絡判断回路１３は時
間設定回路１４であらかじめ設定した時間より長いこと
を検出すると、電流値指示回路１Ｂより電流をおよそ８
０〜８０％程度下降させる信号を電流値設定回路へ出力
し、短絡電流を下降させる。Here, the welding current and welding voltage during welding are always monitored by the welding voltage detection circuit 12 and the welding current detection circuit 11, and when a short circuit occurs during welding, a short circuit current flows and the welding voltage drops due to the short circuit. When the short circuit judgment circuit 13 detects that the time is longer than the time set in advance by the time setting circuit 14, the current value indicating circuit 1B sets the current to approximately 8.
A signal for decreasing the short circuit current by about 0 to 80% is output to the current value setting circuit to decrease the short circuit current.
又本発明請求項（２）による電極負極短絡時に電極電位
を正極による転極させる場合は、前述記載した上に極性
判断回路１５で短絡時の電極電位を判断し負極であるこ
とを検出すると、正極負極比調整回路９へ信号を出力し
正極へ転極させる。その後、短絡が解除されたことを、
溶接電圧１２および溶接型ｆｉｌｌからの信号で短絡判
断回路により検出すると、電流値指示回路１６からあら
かじめ設定した溶接電流へ戻る信号が、電流設定回路６
により出力される。このようにしてｍＭ５時の電流波形
を制御しつつ溶接が実施される。Further, when the electrode potential is reversed by the positive electrode when the electrode negative electrode is short-circuited according to claim (2) of the present invention, in addition to the above-mentioned, when the polarity judgment circuit 15 judges the electrode potential at the time of short-circuit and detects that it is a negative electrode, A signal is output to the positive electrode/negative electrode ratio adjustment circuit 9 to invert the polarity to the positive electrode. Then, confirm that the short circuit has been removed.
When the short circuit judgment circuit detects the welding voltage 12 and the signal from the welding type fill, a signal returning to the preset welding current from the current value indicating circuit 16 is output to the current setting circuit 6.
is output by In this way, welding is performed while controlling the current waveform at mm5.
第２図に示す図は本発明による電波制御の方法を示す溶
接電圧、溶接電流波形を示すものであり、電極正極時に
短絡が生じ、該短絡時間があらかじめ設定された短絡時
間より長い場合であり、その時の極性を保った時の図を
示すが、該図中２０において消耗電極と母材間で短絡を
生じる０期間３４があらかじめ設定された短絡時間より
も長い事を第１図中、溶接電流検出回路１１．溶接電圧
検出回路１２、短絡判断回路１３．時間設定回路１４に
より検出した後、短絡電流値を設定溶接電流値よりも低
い値に第１図中の電流中指系回路１Ｂの指令で期１■３
５に示すように移行させ、ヒユーズ効果により消耗電極
が溶融切断し、アークが再点弧した時にアークのエネル
ギーを電流を下げる事により、溶滴の移行を静かに、か
つスムーズに行う事ができ、大粒で多量のスパッタの発
生を抑える事ができる。The diagram shown in FIG. 2 shows the welding voltage and welding current waveforms showing the method of radio wave control according to the present invention, and it is a case where a short circuit occurs at the positive electrode and the short circuit time is longer than the preset short circuit time. , which shows a diagram when the polarity is maintained at that time. In Figure 1, the zero period 34 that causes a short circuit between the consumable electrode and the base metal at 20 in the diagram is longer than the preset short circuit time. Current detection circuit 11. Welding voltage detection circuit 12, short circuit judgment circuit 13. After detection by the time setting circuit 14, the short circuit current value is set to a value lower than the set welding current value by commands from the current middle finger system circuit 1B in Fig. 1 during periods 1 and 3.
5, the consumable electrode is melted and cut by the fuse effect, and when the arc is re-ignited, the energy of the arc is reduced by lowering the current, allowing the droplet to migrate quietly and smoothly. , it is possible to suppress the generation of large amounts of spatter.
アークが再点弧したことを、第１図中の溶接電流検出回
路１１、溶接電圧検出回路１２より検出した後、溶接電
流を第１図中の電流指示回路１Ｂ、電流値設定回路６に
より、設定した元の電流値に戻して溶接が継続される。After detecting that the arc has been re-ignited by the welding current detection circuit 11 and welding voltage detection circuit 12 in FIG. Welding is continued after returning to the original current value that was set.
また電極負極時に短絡を生じても同様な制御方法により
、短絡時の極性を保った状態で電流波形制御が第２図中
２３〜２７の期間に示すように実施される。Furthermore, even if a short circuit occurs when the electrode is at the negative electrode, current waveform control is carried out using the same control method as shown in periods 23 to 27 in FIG. 2 while maintaining the polarity at the time of the short circuit.
前述したような制御方法は小電流の場合は良好であるが
、溶滴がスプレィ移行する直前近辺の電流値では、負極
短絡時の場合に於いては短絡解除後、即ちアーク再点弧
時に消耗電極が燃え上がってしまう事が観察された。そ
こで負極短絡時には、第３図に示すように電極電位を転
極させる４３（により、該現象を防止することを見い出
した。The control method described above is good for small currents, but at current values just before the droplets spray and transfer, in the case of a negative electrode short circuit, consumption may occur after the short circuit is released, that is, when the arc is re-ignited. It was observed that the electrodes flared up. Therefore, it has been found that when the negative electrode is short-circuited, this phenomenon can be prevented by reversing the electrode potential (43) as shown in FIG.
第３図は本発明による電流波形制御の内、電極負極時に
短絡が発生し、該短絡時間があらかじめ設定された短絡
時間より長い場合であり、該図中２９より短絡を生じ、
３０において短絡時間があらかじめ設定された短絡時間
より長いことを、第１図中の溶接電圧検出回路１１、溶
接電流検出回路１２、短絡判断回路１３、時間設定回路
１４により検出した後、極性を第１図中の極性判断回路
１５で判断し、正極負極比２１ｉ１整回路９により電極
正極に転極し、短絡電流を設定溶接電源より低い値に第
３図中３９の期間移行させる。その後、前述同様に、再
点弧時のアークエネルギーを電流を下げることにより、
アーク再点弧時に発生する大粒かつ大量のスパッタ発生
を抑えることが可能となる。FIG. 3 shows the current waveform control according to the present invention in which a short circuit occurs when the electrode is at the negative electrode, and the short circuit time is longer than the preset short circuit time.
30, the welding voltage detection circuit 11, welding current detection circuit 12, short circuit determination circuit 13, and time setting circuit 14 in FIG. 1 detect that the short circuit time is longer than the preset short circuit time, and then the polarity is The polarity judgment circuit 15 in FIG. 1 makes a judgment, and the positive electrode/negative electrode ratio 21i1 adjustment circuit 9 reverses the electrode polarity to the positive electrode, thereby shifting the short circuit current to a value lower than the set welding power source for a period 39 in FIG. 3. Then, as mentioned above, the arc energy at the time of restriking is reduced by lowering the current.
It is possible to suppress the generation of large and large amounts of spatter that occurs when the arc is re-ignited.
アーク再点弧を第１図中の溶接゛電流検出回路１１、溶
接電圧検出回路１２．短絡判断回路１３により検出した
後、溶接電流を第１図中の電流値指示回路１６、？ｌｔ
流値設定回路６．によりあらかじめ設定した元の電流値
に戻して溶接が実施継続される。The arc is re-ignited by the welding current detection circuit 11 and the welding voltage detection circuit 12 in FIG. After the short circuit judgment circuit 13 detects the welding current, the current value indicating circuit 16 in FIG. lt
Current value setting circuit 6. The current value is returned to the original value set in advance and welding is continued.
また短絡時間がｌ ｍ５ｅｃ以下の非常に短い短絡では
、前に述べたようなスパッタ発生現象は観察することは
できなかったので、短時間短絡の場合は電流制御を実施
しないで良いことが明らかとなった。Furthermore, in very short short circuits with a short circuit duration of less than 1 m5ec, the spatter generation phenomenon described above could not be observed, so it is clear that current control does not need to be implemented in the case of short short circuits. became.
実施例
本発明による溶接電流制御方法を用い、消耗電極式ガス
シールドアーク溶接を実施した。鋼板は軟鋼、板厚２＋
＊ｍを用い、溶接電流は１５０Ａ、周波数は１８０Ｈｚ
の矩形波交流、正極負極比率は電極正極５：電極負極ｌ
の割合とした。シールドガスはＡ「−Ｃｏ２（００２１
０％）を用い、溶接ワイヤは、ＪＩＳＹＧＷ １５ ａ
当品の線径１．２＋ｕ＋を用い、溶接速度は１００ｃａ
ｒｔｓ ｉｎで重ね隅肉溶接を実施した。この時短絡時
の極性は短絡時の極性を保った方法でおこない、短絡検
出時間は１．０ｍ５ｅｃ、短絡時の制御電流値は４ＯＡ
にて行った。EXAMPLE Consumable electrode type gas shield arc welding was carried out using the welding current control method according to the present invention. Steel plate is mild steel, plate thickness 2+
*Using m, welding current is 150A, frequency is 180Hz
Square wave alternating current, positive electrode negative electrode ratio is electrode positive electrode 5: electrode negative electrode l
The percentage of The shielding gas is A"-Co2 (0021
0%), and the welding wire was JISYGW 15 a.
Using this product's wire diameter 1.2+u+, the welding speed is 100ca
Lap fillet welding was performed with rts in. At this time, the polarity at the time of short circuit is maintained in a manner that maintains the polarity at the time of short circuit, the short circuit detection time is 1.0m5ec, and the control current value at the time of short circuit is 4OA.
I went there.
その結果、溶接中のスパッタは目視でも非常に少ない事
が確認でき、実施値においても従来法と比較して約局に
減少していた。またこ時の溶接ビード外観はビード止端
部の整った、平滑でも表面欠陥の無い非常に良好なもの
であった。Ｘ線検査 −を行ったが溶接内部欠陥も無く
健全な溶接継ぎ手であった。さらには発生したスパッタ
の粒径は小粒であることが観察された。As a result, it was confirmed visually that the amount of spatter during welding was extremely low, and the actual values were approximately 100% lower than in the conventional method. The appearance of the weld bead at this time was very good, with a smooth bead toe and no surface defects. An X-ray inspection was conducted and the welded joint was found to be sound with no internal defects. Furthermore, it was observed that the particle size of the generated spatter was small.
次に短絡時の極性が電極負極短絡時には極性を電極正極
に転極し、電極正極時にはその極性を保つ方法で、溶接
′ＦＬ流は２４ＯＡ、短４％昨制御電流は５０Ａとし、
他の条件は前述と同様な溶接条件において溶接を実施し
た。その結果、溶接ビード外観はビード良好であり、ま
たｘ！ａ検査の結果も良好で内部欠陥のない健全な溶接
継ぎ手であった。またこの時のスパッタ発生量も目視で
も非常に少なく、実測値において従来法と比較して約局
に減少している事が明らかとなった。さらには発生した
スパッタの粒径は小粒である事も観察された。Next, when the electrode negative electrode is short-circuited, the polarity is reversed to the electrode positive electrode, and when the electrode is positive, the polarity is maintained.The welding FL current is 24 OA, and the short 4% control current is 50 A.
Welding was performed under the same welding conditions as described above. As a result, the weld bead appearance was good and x! The results of the A inspection were also good, and the welded joint was sound and free of internal defects. Furthermore, the amount of spatter generated at this time was also very small when visually observed, and the actual measured values revealed that it was approximately reduced compared to the conventional method. Furthermore, it was also observed that the particle size of the generated spatter was small.
発明の効果
以」−説明したように本発明によれば、消耗電極式ガス
アークシールド溶接法に於いて発生するスパッタ場を、
従来からの方法と比べると約局に減少する事ができ、溶
接欠陥の無い健全な溶接継ぎ手を作製することができる
。Effects of the Invention - As explained, according to the present invention, the sputter field generated in the consumable electrode type gas arc shield welding method can be
Compared to conventional methods, the number of welds can be reduced to approx. 1,000, and a sound welded joint without welding defects can be produced.
このように本発明によれば、スパッタ発生量は少なく小
粒なため、溶接トーチのノズルあるいは製品に付着する
量は極めて少なくなるため、自動溶接あるいはロボット
溶接などにおいて、長時間の連続溶接が回旋になるばか
りでなく、溶接品質の向り及び均一化を計るＩｔができ
る。またスパッタが付着しても小粒なため容易に除去で
きるので、スパッタ除去に費やす時間を軽減する１杯が
可能となる。このように本発明は極めて工業的に価値の
高い矩形波交流溶接法の溶接電流制御方法を提供するも
のである。As described above, according to the present invention, since the amount of spatter generated is small and the amount of spatter attached to the nozzle of the welding torch or the product is extremely small, continuous welding for long periods of time in automatic welding or robot welding can be performed without rotation. It is possible to not only improve the quality of the welding but also improve the quality and uniformity of the welding. Furthermore, even if spatter adheres, it can be easily removed because it is small, so it is possible to reduce the time spent removing spatter. As described above, the present invention provides a welding current control method for rectangular wave AC welding, which is extremely industrially valuable.
第１図は本発明の実施のために用いる装置の構成を示す
ブロックダイヤグラム、第２図及び第３図は本発明方法
による矩形波電流波形制御例を示す波形図、第４図は従
来からの電流波形制御を行わない場合の溶接電流、電圧
波形図である。
ｌ・・−３相交流整流回路、２・・・１次側インバータ
、３＠・・変圧器、４・・−２次側整流回路２５・・−
２次側インバータ回路、６−・・電流値設定回路、７−
・争装置増幅回路、８・・・相間短絡防止回路、９ ｅ
拳ｅ正極負極比調整回路、１０・・・発信回路、１１
・・・溶接電流検出回路、１２・・・溶接電圧検出回路
、１３・壷・短絡判断回路、 １４・・・時間設定回路
、１５・・・極性判断回路、１６−・・電流値指示回路
、１７・・拳消耗電極、１８・・・アーク、１３１１・
・母材、２０・・・電極正極短絡発生時点、２１．２５
．２９−・・短絡時間があらかじめ設定された短絡時間
よりも長いことを判断した時点、２４．２９Φ・・電極
負極短絡発生時点、２２．２６．３１・・・アークが再
点弧した時点、２３．２７．２８．３２・φ・電極電位
が設定された周波数の周期で転極した時点、３０１１１
１・電極負極短絡発生時に電流制御により転極した時点
、３４．３Ｂ、３８・・・短絡電流が流れている時間、
３５．３７．３９・・・電流制御により設定溶接電流よ
り低い電流値に移行してる時間。FIG. 1 is a block diagram showing the configuration of an apparatus used to carry out the present invention, FIGS. 2 and 3 are waveform diagrams showing an example of rectangular current waveform control by the method of the present invention, and FIG. FIG. 6 is a welding current and voltage waveform diagram when current waveform control is not performed. 1...-3-phase AC rectifier circuit, 2...Primary side inverter, [email protected], 4...-Secondary side rectifier circuit 25...-
Secondary side inverter circuit, 6-... Current value setting circuit, 7-
・Interphase short circuit prevention circuit, 9 e
Fist e Positive electrode negative electrode ratio adjustment circuit, 10... Transmission circuit, 11
...Welding current detection circuit, 12--Welding voltage detection circuit, 13-Pot/short circuit judgment circuit, 14-Time setting circuit, 15-Polarity judgment circuit, 16--Current value indication circuit, 17... fist consumable electrode, 18... arc, 1311...
・Base material, 20... Time of electrode positive electrode short circuit occurrence, 21.25
．． 29-... Time when it is determined that the short circuit time is longer than the preset short circuit time, 24.29Φ... Time when electrode negative electrode short circuit occurs, 22.26.31... Time when the arc is re-ignited, 23 .27.28.32・φ・When the electrode potential changes polarity at the period of the set frequency, 30111
1. Time of polarity reversal by current control when electrode negative electrode short circuit occurs, 34.3B, 38... time during which short circuit current is flowing,
35.37.39... Time during which the current value shifts to a lower current value than the set welding current due to current control.
Claims (2)
バータを構成し、該インバータにより矩形波交流を出力
しかつ該交流の周波数、電極の正極成分及び負極成分を
任意に調整できるアーク溶接用矩形波交流溶接電極を用
いて行う消耗電極式アーク溶接方法において、消耗電極
と母材間が短絡発生した事を検出し、あらかじめ設定し
た設定時間より長い場合にかぎり短絡時の極性を保ちか
つそのときの短絡電流値を設定溶接電流値よりも低い値
に移行させ、該短絡が解除したことを検出した直後に設
定溶接電流値に復帰させることを特徴とする消耗電極式
矩形波交流アーク溶接方法。(1) A rectangular wave alternating current for arc welding in which an inverter is configured with a switching element on the output side of the welding power source, and the inverter outputs a rectangular wave alternating current, and the frequency of the alternating current and the positive electrode component and negative electrode component of the electrode can be arbitrarily adjusted. In the consumable electrode type arc welding method using a welding electrode, the occurrence of a short circuit between the consumable electrode and the base metal is detected, and the polarity at the time of the short circuit is maintained only if it is longer than a preset time, and the short circuit at that time is maintained. A consumable electrode type rectangular wave alternating current arc welding method characterized by shifting the current value to a value lower than the set welding current value and returning to the set welding current value immediately after detecting that the short circuit is released.
バータを構成し、該インバータにより矩形波交流を出力
しかつ該交流の周波数、電極の正極成分及び負極成分を
任意に調整できるアーク溶接用矩形波交流溶接電極を用
いて行う消耗電極式アーク溶接方法において、消耗電極
と母材間が短絡発生した事を検出し、あらかじめ設定し
た設定時間より長い場合にかぎり短絡後の極性を、電極
負極性時に短絡を生じた時は電極正極に転極し、また電
極正極性時に短絡を生じた時には極性を保ち、これらい
ずれの場合にもそのときの短絡電流値を設定溶接電流値
よりも低い値に移行させ、該短絡が解除したことを検出
した直後に設定溶接電流値に復帰させる事を特徴とする
消耗電極式矩形波交流アーク溶接方法。(2) A rectangular wave alternating current for arc welding in which an inverter is configured with a switching element on the output side of the welding power source, and the inverter outputs a rectangular wave alternating current, and the frequency of the alternating current and the positive electrode component and negative electrode component of the electrode can be arbitrarily adjusted. In the consumable electrode type arc welding method using a welding electrode, the occurrence of a short circuit between the consumable electrode and the base metal is detected, and the polarity after the short circuit is changed only when the time is longer than a preset setting, and the short circuit is set when the electrode is negative polarity. When this occurs, the electrode polarity is changed to positive, and when a short circuit occurs when the electrode is positive, the polarity is maintained, and in either of these cases, the short circuit current value at that time is shifted to a value lower than the set welding current value. A consumable electrode type rectangular wave alternating current arc welding method, characterized in that the welding current value is returned to the set value immediately after detecting that the short circuit has been released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12639088A JPH01299768A (en) | 1988-05-24 | 1988-05-24 | Consumable electrode type rectangular wave ac arc welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12639088A JPH01299768A (en) | 1988-05-24 | 1988-05-24 | Consumable electrode type rectangular wave ac arc welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01299768A true JPH01299768A (en) | 1989-12-04 |
Family
ID=14933954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12639088A Pending JPH01299768A (en) | 1988-05-24 | 1988-05-24 | Consumable electrode type rectangular wave ac arc welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01299768A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004298924A (en) * | 2003-03-31 | 2004-10-28 | Daihen Corp | Method for controlling feeding of wire in arc welding accompanied with short circuit |
| JP2004314098A (en) * | 2003-04-14 | 2004-11-11 | Daihen Corp | Arc welder |
| JP2011020139A (en) * | 2009-07-15 | 2011-02-03 | Panasonic Corp | Welding device and welding method |
| WO2012032710A1 (en) * | 2010-09-07 | 2012-03-15 | パナソニック株式会社 | Tig welding method |
| JP2013240811A (en) * | 2012-05-21 | 2013-12-05 | Daihen Corp | Ac pulse arc welding control method |
| US9370868B2 (en) | 2003-05-23 | 2016-06-21 | Intuitive Surgical Operations, Inc. | Articulating endoscopes |
| US9561045B2 (en) | 2006-06-13 | 2017-02-07 | Intuitive Surgical Operations, Inc. | Tool with rotation lock |
| US9700334B2 (en) | 2004-11-23 | 2017-07-11 | Intuitive Surgical Operations, Inc. | Articulating mechanisms and link systems with torque transmission in remote manipulation of instruments and tools |
| JP2019104040A (en) * | 2017-12-14 | 2019-06-27 | 株式会社ダイヘン | Coated electrode welding system and welding power supply device for coated electrode welding |
-
1988
- 1988-05-24 JP JP12639088A patent/JPH01299768A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004298924A (en) * | 2003-03-31 | 2004-10-28 | Daihen Corp | Method for controlling feeding of wire in arc welding accompanied with short circuit |
| JP2004314098A (en) * | 2003-04-14 | 2004-11-11 | Daihen Corp | Arc welder |
| US9440364B2 (en) | 2003-05-23 | 2016-09-13 | Intuitive Surgical Operations, Inc. | Articulating instrument |
| US9550300B2 (en) | 2003-05-23 | 2017-01-24 | Intuitive Surgical Operations, Inc. | Articulating retractors |
| US9498888B2 (en) | 2003-05-23 | 2016-11-22 | Intuitive Surgical Operations, Inc. | Articulating instrument |
| US9370868B2 (en) | 2003-05-23 | 2016-06-21 | Intuitive Surgical Operations, Inc. | Articulating endoscopes |
| US9434077B2 (en) | 2003-05-23 | 2016-09-06 | Intuitive Surgical Operations, Inc | Articulating catheters |
| US10321927B2 (en) | 2004-11-23 | 2019-06-18 | Intuitive Surgical Operations, Inc. | Articulating mechanisms and link systems with torque transmission in remote manipulation of instruments and tools |
| US9700334B2 (en) | 2004-11-23 | 2017-07-11 | Intuitive Surgical Operations, Inc. | Articulating mechanisms and link systems with torque transmission in remote manipulation of instruments and tools |
| US9561045B2 (en) | 2006-06-13 | 2017-02-07 | Intuitive Surgical Operations, Inc. | Tool with rotation lock |
| JP2011020139A (en) * | 2009-07-15 | 2011-02-03 | Panasonic Corp | Welding device and welding method |
| JP5278563B2 (en) * | 2010-09-07 | 2013-09-04 | パナソニック株式会社 | TIG welding method |
| CN102523736A (en) * | 2010-09-07 | 2012-06-27 | 松下电器产业株式会社 | Tig welding method |
| WO2012032710A1 (en) * | 2010-09-07 | 2012-03-15 | パナソニック株式会社 | Tig welding method |
| JP2013240811A (en) * | 2012-05-21 | 2013-12-05 | Daihen Corp | Ac pulse arc welding control method |
| JP2019104040A (en) * | 2017-12-14 | 2019-06-27 | 株式会社ダイヘン | Coated electrode welding system and welding power supply device for coated electrode welding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2481930C2 (en) | System and method for increasing heat feed to welding points in short-circuited arc welding | |
| KR100349968B1 (en) | Short circuit welder | |
| CN100471607C (en) | Pulse welder and method of using same | |
| US5225660A (en) | Consumable-electrode ac gas shield arc welding method and apparatus therefor | |
| US8937267B2 (en) | Method and system to increase heat input to a weld during a short-circuit arc welding process | |
| US20130299476A1 (en) | Arc welding control method and arc welding device | |
| US9415458B2 (en) | Method to improve the characteristics of a root pass pipe weld | |
| JP2005288542A (en) | Electric arc pulse welder with short circuit control | |
| US3679866A (en) | Pulsed arc spray welding in a narrow groove | |
| JPH01299768A (en) | Consumable electrode type rectangular wave ac arc welding method | |
| RU2345873C2 (en) | Synergetic system of welding | |
| US3777113A (en) | Method of intermittent arc welding using potassium and magnesium electrode additives | |
| JPS6316868A (en) | Low electric current welding method | |
| JP5349152B2 (en) | AC pulse arc welding control method | |
| JP3948767B2 (en) | High frequency AC TIG welding machine | |
| JPH079150A (en) | Gas shielded arc welding method for galvanized steel sheet and galvanized steel sheet product welded by the welding method | |
| JPH03234365A (en) | Device for supplying ac square wave welding power source for arc welding | |
| JPH0740050A (en) | Tig welding method for galvanized steel sheet | |
| JP2024090326A (en) | Pulsed arc welding method for galvanized steel sheets | |
| JPS60177963A (en) | Arc welding method | |
| JPS61232066A (en) | Narrow groove submerged arc welding | |
| JPS60223660A (en) | Arc welding method | |
| JPH05131272A (en) | Tig arc welding method for aluminum alloy | |
| JPH08132233A (en) | Consumable electrode pulse arc welding machine | |
| JPH06182544A (en) | Fillet welding method of precoated steel sheet |