JPS6355394B2 - - Google Patents
Info
- Publication number
- JPS6355394B2 JPS6355394B2 JP158182A JP158182A JPS6355394B2 JP S6355394 B2 JPS6355394 B2 JP S6355394B2 JP 158182 A JP158182 A JP 158182A JP 158182 A JP158182 A JP 158182A JP S6355394 B2 JPS6355394 B2 JP S6355394B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- current
- base material
- welding
- filler wire
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 37
- 239000000945 filler Substances 0.000 claims description 15
- 239000010953 base metal Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
- 239000011324 bead Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 239000000155 melt Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1093—Consumable electrode or filler wire preheat circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Description
【発明の詳細な説明】
この発明は、フイラーワイヤ内部にも電流を供
給して予熱しながらTIG溶接を行うホツトワイヤ
式アーク溶接装置の、特にフイラーワイヤへの通
電方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot wire type arc welding apparatus that performs TIG welding while preheating the filler wire by supplying current to the inside of the filler wire, and particularly relates to a method of supplying current to the filler wire.
従来のホツトワイヤ式アーク溶接装置の構成は
第１図に示す通りである。図において、１はトー
チ、２はタングステン電極、３はアーク電流供給
用の電源、４はフイラーワイヤ（以下、単に「ワ
イヤ」という）、５はワイヤを送給するための駆
動用ローラ、６はワイヤ加熱用の電源、７はアー
ク、８は溶接ビード、９は母材、１０はワイヤに
接触し電流を供給するための給電装置、１１は駆
動用ローラ５を回転させるためのモータであり、
図中の矢印は溶接進行方向を示す。 The configuration of a conventional hot wire type arc welding device is as shown in FIG. In the figure, 1 is a torch, 2 is a tungsten electrode, 3 is a power source for supplying arc current, 4 is a filler wire (hereinafter simply referred to as "wire"), 5 is a driving roller for feeding the wire, and 6 is a drive roller for feeding the wire. A power source for heating the wire; 7 is an arc; 8 is a weld bead; 9 is a base material; 10 is a power supply device for contacting the wire and supplying current; 11 is a motor for rotating the driving roller 5;
The arrow in the figure indicates the direction of welding progress.
従来のホツトワイヤ式アーク溶接装置の動作は
次の通りである。 The operation of a conventional hot wire arc welding device is as follows.
電源３を用いて電流を供給し、タングステン電
極２と母材９との間にアーク７を維持させる。ま
たモータ１１を用いて駆動用ローラ５を回転さ
せ、ワイヤ４を母材９の方向へ送給し、同時に電
源６を用いてワイヤ４と母材９との短絡と同時に
ワイヤ４内部にも電流を流すと、ワイヤ４は予熱
され、母材９へ到達した時点ではほぼ溶融し、予
めアーク７によつて加熱された母材９の上にビー
ドとなつて堆積していく。 A current is supplied using a power source 3 to maintain an arc 7 between the tungsten electrode 2 and the base material 9. Further, the motor 11 is used to rotate the drive roller 5 to feed the wire 4 in the direction of the base material 9, and at the same time, the power supply 6 is used to short-circuit the wire 4 and the base material 9, and at the same time, a current is generated inside the wire 4. When flowing, the wire 4 is preheated and almost melts when it reaches the base material 9, and is deposited in the form of a bead on the base material 9, which has been previously heated by the arc 7.
従来の装置は以上のように構成されており、ワ
イヤの送給量とワイヤ加熱用の電流（以下、単に
「ワイヤ電流」という）とは、全く独立に調整せ
ねばならず、あるワイヤ送給量に対し、ワイヤ電
流が多過ぎてワイヤが溶け過ぎた場合、あるいは
作業者の手振れ等によつてワイヤを含んだトーチ
１全体が母材９から離れた場合にはワイヤ４が母
材９上の溶融池から離れてしまう。従つて電源６
の無負荷電圧が低い場合にはワイヤ電流が切れて
ワイヤが冷えてしまうためワイヤ４から母材９へ
の溶滴移行が不連続となり、ビード８の形成も不
連続となつてしまう。 Conventional devices are configured as described above, and the amount of wire fed and the current for heating the wire (hereinafter simply referred to as "wire current") must be adjusted completely independently. If the wire melts too much due to excessive wire current, or if the entire torch 1 including the wire separates from the base material 9 due to hand shaking of the operator, the wire 4 may fall onto the base material 9. away from the molten pool. Therefore, power supply 6
When the no-load voltage is low, the wire current is cut off and the wire cools down, so the transfer of droplets from the wire 4 to the base material 9 becomes discontinuous, and the formation of the bead 8 also becomes discontinuous.
また電源６の無負荷電圧が高い場合には、ワイ
ヤ４と母材９との間にアークが発生してスパツタ
が生じやすくなる。これとは逆に、あるワイヤ送
給量に対してワイヤ電流が少な過ぎた場合、ある
いは、作業者の手振れ等によつてトーチ全体が母
材へ近づいた場合にはワイヤ４は溶融状態になら
ずに母材９に突込み、溶融池が乱されたりする。
このように従来の装置は、ワイヤの送給量とワイ
ヤ電流とが全く独立に調整せねばならずワイヤか
ら母材への溶滴移行を円滑に行わせるには、熟練
と時間が必要であつた。 Further, when the no-load voltage of the power supply 6 is high, arcs are generated between the wire 4 and the base material 9, and spatter is likely to occur. On the contrary, if the wire current is too small for a certain wire feed rate, or if the entire torch approaches the base material due to operator hand shaking, the wire 4 will not melt. The molten metal may penetrate into the base material 9 without moving, and the molten pool may be disturbed.
In this way, with conventional devices, the wire feed rate and wire current must be adjusted completely independently, and it requires skill and time to ensure smooth droplet transfer from the wire to the base material. Ta.
この発明は上記のような従来の装置の欠点を除
去するためになされたもので、ワイヤが母材から
離れたり、あるいはワイヤが母材へ突込んだりせ
ず、ワイヤが溶融状態で円滑に母材へ接触移行し
ていくように自動的に制御できる装置を提供する
ことを目的としている。 This invention was made in order to eliminate the drawbacks of the conventional devices as described above, and the wire does not separate from the base material or penetrate into the base material, and the wire can be smoothly mated in a molten state. The purpose is to provide a device that can automatically control the contact transfer to materials.
この発明の一実施例によるホツトワイヤ式アー
ク溶接装置の構成を第２図に示す。図において、
１２はアーク負荷およびフイラーワイヤに電流を
供給するための電源、１３，１４はそれぞれワイ
ヤ電流および溶接電流を制御するためのトランジ
スタ等のスイツチング素子、１５，１６はリアク
トル、１７，１８はそれぞれトランジスタ１３お
よび１４がOFF状態になつた直後にリアクトル
１５，１６に蓄えられたエネルギーを放出するた
めのダイオード、１９は溶接電流を検出するため
の検出器Ａ、２０は給電装置１０と母材９との間
の電位差を検出するための検出器Ｂ、２１は溶接
電流を設定するための設定器、２２は溶接電流と
ワイヤ送給速度VWとの関数関係が予め設定され、
溶接電流の設定値IOに対してワイヤ送給速度VW
を規定する関数発生器Ａ、２３はワイヤ送給速度
とワイヤ・母材間の関数関係が予め設定され、関
数発生器Ａ２２にて規定されたワイヤ送給速度
VWに対してワイヤ・母材間の電圧VOを規定する
関数発生器Ｂ、２４は検出器Ｂで検出された電圧
Ｖと関数発生器Ｂ２３で設定された電圧Voとを
比較するための比較器Ａ、２５は比較器２４の出
力に応じ、Ｖ≦Voであればスイツチング素子１
３をONとし、Ｖ＞Voであればスイツチング素
子１３をOFFとするようなON―OFF信号を発す
る指令回路Ａ、２６は検出器Ａ１９で検出された
溶接電流ＩとIoとを比較するための比較器Ｂ、２
７は比較器Ｂ２６の出力に応じ、Ｉ≦Ioならスイ
ツチング素子１４をONとし、Ｉ＞Ioならスイツ
チング素子１４をOFFとするようなON―OFF信
号を発する指令回路Ｂ、２８はワイヤ送給速度を
微調整するための調整装置である。 FIG. 2 shows the configuration of a hot wire type arc welding apparatus according to an embodiment of the present invention. In the figure,
12 is a power source for supplying current to the arc load and filler wire; 13 and 14 are switching elements such as transistors for controlling the wire current and welding current, respectively; 15 and 16 are reactors; and 17 and 18 are transistors 13 and 13, respectively. and a diode for releasing the energy stored in the reactors 15 and 16 immediately after 14 is turned off, 19 is a detector A for detecting the welding current, and 20 is a connection between the power supply device 10 and the base material 9. Detector B for detecting the potential difference between, 21 is a setting device for setting the welding current, 22 is a functional relationship between the welding current and the wire feeding speed V W is set in advance,
Wire feeding speed V W for the set value I O of welding current
The function generators A and 23 that define the wire feeding speed and the functional relationship between the wire and the base material are set in advance, and the wire feeding speed specified by the function generator A22 is set in advance.
A function generator B, 24, which defines the voltage V O between the wire and the base metal with respect to V W , is used to compare the voltage V detected by the detector B and the voltage Vo set by the function generator B23. Comparator A, 25 responds to the output of comparator 24, and switches switching element 1 if V≦Vo.
3 is ON, and if V>Vo, the switching element 13 is turned OFF. Command circuit A 26 is for comparing the welding current I detected by detector A 19 with Io. Comparator B, 2
7 is a command circuit B that emits an ON-OFF signal that turns on the switching element 14 if I≦Io and turns off the switching element 14 if I>Io according to the output of the comparator B26; 28 is a wire feeding speed; This is an adjustment device for making fine adjustments.
次にこの発明の原理について説明する。 Next, the principle of this invention will be explained.
ワイヤ４に電流が流れると、給電装置１０と母
材９との間に電位差Ｖが生じる。ワイヤ電流はワ
イヤ４が母材９に到達した時点で丁度溶融状態に
なるように供給されねばならず、ワイヤ４の送給
速度を上昇させるとワイヤ電流も大きくしなけれ
ばならない。従つてワイヤ送給速度VWに応じて
丁度溶融状態でワイヤ４が母材９に到達するため
には、給電装置１０と母材９との間の電位差はそ
のワイヤ送給速度VWに応じた適正値Voに保つ必
要がある。 When a current flows through the wire 4, a potential difference V is generated between the power supply device 10 and the base material 9. The wire current must be supplied so that the wire 4 is just in the molten state when it reaches the base material 9, and as the feeding speed of the wire 4 is increased, the wire current must also be increased. Therefore, in order for the wire 4 to reach the base metal 9 in just the molten state according to the wire feed speed V W , the potential difference between the power supply device 10 and the base metal 9 must be adjusted according to the wire feed speed V W . It is necessary to maintain Vo at an appropriate value.
ワイヤ電流が多過ぎたり、また作業者の手振れ
等によりトーチ１が母材９から遠ざかり、ワイヤ
先端の溶融部がビード８から浮き上がりかけて、
その溶融部が細くなり、その部分での電気抵抗が
大きくなる結果としてＶが上がるような場合に
は、ワイヤ電流を下げてワイヤの溶融速度を遅く
せねばならない。逆にＶがVoより低くなつた場
合には、ワイヤ電流を上げてワイヤの溶融速度を
速くせねばならない。第３図はワイヤ径が1.2mm
で給電装置１０と母材９との間のワイヤ４の加熱
距離を70mmとしたときの、VWとVoとの関数関係
の一例であり、このような関数関係（第３図では
Vo＝1.2（VW−0.15））が規定されたものが、関数
発生器Ｂ２３である。 If the wire current is too high or the worker's hand shakes, the torch 1 moves away from the base material 9, and the molten part at the tip of the wire begins to rise from the bead 8.
If the molten part becomes thinner and the electrical resistance increases in that part, resulting in an increase in V, the wire current must be lowered to slow down the melting rate of the wire. Conversely, if V becomes lower than Vo, the wire current must be increased to increase the melting rate of the wire. In Figure 3, the wire diameter is 1.2mm.
This is an example of the functional relationship between V W and Vo when the heating distance of the wire 4 between the power supply device 10 and the base material 9 is 70 mm.
The function generator B23 is defined as Vo=1.2 (V W -0.15).
また一方、母材９への入熱量とビード８の余盛
量との適正関係については、次のような実験事実
がある。すなわち、母材の板厚、溶接電流を一定
にした場合、溶接速度、ワイヤ送給速度に応じて
ビードの外観は変化する。母材を板厚3.2mmの軟
鋼とし、ワイヤ径1.2mm、アーク電流を300A、ア
ーク長3.2mmにしたとき、ワイヤ４がほぼ溶融し
た状態で丁度母材９と接触するようにワイヤの送
給速度とワイヤ加熱電流を調整して溶接速度と
（ワイヤ送給速度）／（溶接速度）との種々の組
合せに対してビードの形状を実験的に求めると、
第４図ａ〜ｂのように領域分けができる。 On the other hand, the following experimental facts exist regarding the appropriate relationship between the amount of heat input to the base material 9 and the amount of surplus of the bead 8. That is, when the thickness of the base material and the welding current are held constant, the appearance of the bead changes depending on the welding speed and wire feeding speed. When the base material is mild steel with a plate thickness of 3.2 mm, the wire diameter is 1.2 mm, the arc current is 300 A, and the arc length is 3.2 mm, the wire is fed so that the wire 4 is almost molten and just contacts the base material 9. By adjusting the speed and wire heating current and experimentally determining the bead shape for various combinations of welding speed and (wire feeding speed)/(welding speed),
Areas can be divided as shown in FIGS. 4a to 4b.
なお、（ワイヤ送給速度）／（溶接速度）は、
ビードの余盛部分の横断面の面積Ｑに相当する。
即ち、Ｑ＝π（ｄ／２）2VW／VYであり、Ｑ∝
VW／VYである。ただし、ｄはワイヤの径、VYは
溶接速度である。 In addition, (wire feeding speed) / (welding speed) is
This corresponds to the area Q of the cross section of the extra heap of the bead.
That is, Q=π(d/2) 2 V W /V Y , and Q∝
V W /V Y. However, d is the diameter of the wire, and V Y is the welding speed.
第４図中に実線で囲んだ三角形の領域(a)は、母
材９への入熱も適正で、安定なビードを形成する
ことができる領域で、所望の溶接断面形状が得ら
れる範囲である。領域(b)は、ワイヤ送給量が多過
ぎ、ビードが凸形となつて母材９とビード８との
なじみが悪い領域、領域(c)はワイヤ送給量が少な
く、溶接速度が速すぎアンダーカツトやハンピン
グビードが現われる領域、領域(d)は溶接速度が遅
すぎ、母材が溶け落ちてしまう領域である。この
ように、母材９の板厚、溶接電流が決まれば、安
定なビードが形成できる溶接速度とワイヤ送給速
度の関係が定まつてしまう。一方、溶接速度は実
際の溶接施工上可能な限り任意の値に設定される
べきものであることを考え、母材９の板厚、溶接
電流を決めたときワイヤ送給速度の適正範囲に注
目してみる。 The triangular area (a) surrounded by a solid line in Fig. 4 is an area where the heat input to the base metal 9 is appropriate and a stable bead can be formed, and within the range where the desired welded cross-sectional shape can be obtained. be. Region (b) is a region where the wire feed amount is too large and the bead has a convex shape, resulting in poor compatibility between the base metal 9 and bead 8. Region (c) is a region where the wire feed amount is too small and the welding speed is high. In area (d), where undercuts and humping beads appear, the welding speed is too slow and the base metal melts through. In this way, once the plate thickness of the base material 9 and the welding current are determined, the relationship between the welding speed and the wire feeding speed at which a stable bead can be formed is determined. On the other hand, considering that the welding speed should be set to an arbitrary value as much as possible in actual welding work, pay attention to the appropriate range of the wire feed speed when determining the thickness of the base material 9 and the welding current. I'll try it.
第４図において、ワイヤ送給速度が一定の点は
図中の破線で示される曲線上にのる。溶接施工
上、高速溶接域（第４図の右部分）および溶着量
大の領域（第４図の左上部分）を用いることが多
いので、板厚3.2mm、溶接電流300Aの場合は、ワ
イヤ送給速度は2m／分〜4.5m／分に設定すれば
よいことになる。 In FIG. 4, points where the wire feeding speed is constant lie on the curve shown by the broken line in the figure. During welding, we often use the high-speed welding area (the right part of Figure 4) and the area with a large amount of welding (the upper left part of Figure 4), so when the plate thickness is 3.2 mm and the welding current is 300 A, the wire feed The feeding speed may be set between 2 m/min and 4.5 m/min.
第５図は1.2mmφの軟鋼ワイヤを用い、板厚12
mm、1.6mm、3.2mmについて種々の溶接電流に対す
る適正なワイヤ送給速度域を実験で求めた結果を
まとめたものである。第５図からもわかるように
ワイヤ径とアーク電流が決まれば板厚1.2mm〜3.2
mm程度においては、ワイヤ送給速度の適正範囲は
板厚にあまり関係なく、一点鎖線Ａ，Ｂの間には
さまれた領域となる。 Figure 5 uses 1.2 mmφ mild steel wire, and the plate thickness is 12 mm.
This is a summary of the results of experiments to determine the appropriate wire feed speed range for various welding currents for mm, 1.6 mm, and 3.2 mm. As can be seen from Figure 5, once the wire diameter and arc current are determined, the plate thickness is 1.2 mm to 3.2 mm.
In the range of about mm, the appropriate range of the wire feeding speed has little to do with the plate thickness, and falls within the range between the dashed-dotted lines A and B.
関数発生器Ａ２２は第５図に示すように溶接電
流をＸ軸とし、フイラーワイヤ送給速度をＹ軸と
したXY平面における、所望の溶接断面形状が得
られる領域、即ち一点鎖線Ａ，Ｂの間にはさまれ
た領域内に入る関数（例えば第５図ではVW＝
２／150（IO−50）が予め設定され、この関数によ
り、設定された溶接電流に対してフイラーワイヤ
送給速度を規定するものである。また２８は第５
図中の一点鎖線Ａ，Ｂ間の範囲でワイヤ送給速度
を微調整するための装置である。 As shown in FIG. 5, the function generator A22 calculates the area where a desired weld cross-sectional shape can be obtained, that is, the dot-dashed lines A and B on the XY plane with the welding current as the X axis and the filler wire feeding speed as the Y axis. A function that falls within the region between them (for example, in Figure 5, V W =
2/150 ( IO -50) is preset, and this function defines the filler wire feeding speed for the set welding current. Also, 28 is the fifth
This is a device for finely adjusting the wire feeding speed in the range between the dashed-dotted lines A and B in the figure.
次に第２図に示した一実施例につき、その動作
を説明する。 Next, the operation of the embodiment shown in FIG. 2 will be explained.
この発明は電源１２によつてアーク７を点弧
し、モータ１１にてワイヤ４を母材９の方向に送
給してワイヤ４が母材９と接触した後の定常的な
溶接状態に関するものであり、動作の説明もその
状態について行う。 This invention relates to a steady welding state after the arc 7 is ignited by the power source 12, the wire 4 is fed in the direction of the base material 9 by the motor 11, and the wire 4 comes into contact with the base material 9. , and the operation will also be explained with respect to that state.
母材の板厚および溶接速度に応じた溶接電流Io
を選択して設定器２１にてその値を設定する。関
数発生器Ａ２２ではIoに応じたワイヤ送給速度
VWを設定するが、その出力はモータ１１に送ら
れると共に、関数発生器Ｂ２３にも入力される。
関数発生器Ｂ２３は関数発生器Ａ２２にて設定さ
れるVWに応じてVoを設定し、その値は比較器Ａ
２４にて、検出器Ｂ２０によつて検出される給電
装置１０と母材９との間の電位差Ｖと比較され
る。指令回路Ａ２５は、比較器Ａ２４の出力を受
け、スイツチング素子１３に、Ｖ＞VoならOFF、
Ｖ≦VoならONの指令を発する。比較器Ｂ２６
は検出器Ａ１９にて検出された溶接電流値Ｉと設
定器２１にて設定された電流値Ioとを比較し、Ｉ
＞Ioか、Ｉ≦Ioかを判定する。その判定に応じ指
令回路Ｂ２７はスイツチング素子１４にＩ＞Ioな
らOFF、Ｉ＞IoならONとなるように指令を発す
る。 Welding current Io according to base metal plate thickness and welding speed
, and set the value using the setting device 21. In function generator A22, wire feeding speed according to Io
VW is set, and its output is sent to the motor 11 and also input to the function generator B23.
The function generator B23 sets Vo according to V W set by the function generator A22, and the value is set by the comparator A.
At 24, it is compared with the potential difference V between the power supply device 10 and the base material 9 detected by the detector B20. The command circuit A25 receives the output of the comparator A24 and instructs the switching element 13 to turn OFF if V>Vo;
If V≦Vo, an ON command is issued. Comparator B26
compares the welding current value I detected by the detector A19 and the current value Io set by the setting device 21,
>Io or I≦Io. In response to the determination, the command circuit B27 issues a command to the switching element 14 to turn OFF if I>Io and turn ON if I>Io.
以上の動作により、ワイヤ送給速度が与えられ
たとき、作業者の手振れ等により、ワイヤの加熱
距離が変化しても必ず自動的にワイヤ電流が調整
制御されるので、ビード形成が安定かつ円滑に行
われる。しかもスイツチング素子１４のON、
OFFによつてアーク電流はほぼ一定に保たれる
ので、母材への入熱状況は変わらない。従つて定
常状態では母材への入熱量及び余盛量必ず一定と
なるので、ビード形状も均一になる。 With the above operation, when the wire feeding speed is given, the wire current is automatically adjusted and controlled even if the heating distance of the wire changes due to operator hand shake, etc., so bead formation is stable and smooth. It will be held in Moreover, the switching element 14 is turned on,
Since the arc current is kept almost constant by turning off, the heat input to the base metal does not change. Therefore, in a steady state, the amount of heat input to the base material and the amount of excess metal are always constant, so the bead shape also becomes uniform.
以上のように、この発明によれば、ワイヤ母材
間の電圧が、ほぼ接触短絡した状態の値に自動的
に保持されるため、ワイヤ送給量の変動、作業者
の手振れなどに影響されず、ワイヤは常に円滑に
予熱を受け、ほぼ溶融状態となつて母材と接触短
絡しながらビードが安定に形成されていくという
大きな効果が得られる。 As described above, according to the present invention, the voltage between the wire base materials is automatically maintained at a value almost equal to that of a short-circuited state, so that it is not affected by fluctuations in the wire feed rate, operator hand shake, etc. First, the wire is always smoothly preheated, becomes almost molten, and forms a bead stably while contacting and short-circuiting the base material.
第１図は従来のホツトワイヤ式アーク溶接装置
の構成を示す図、第２図はこの発明の一実施例に
よるホツトワイヤ式アーク溶接装置の構成を示す
図、第３図はワイヤ送給速度と、ワイヤ・母材間
の電圧との関係を示す図、第４図は溶接速度とワ
イヤ送給速度との組合せによるビード形状の変化
の様子を示す図、第５図は溶接電流とワイヤ送給
速度との関係を示す図である。
図において１はトーチ、２はタングステン電
極、４はワイヤ、７はアーク、８はビード、９は
母材、１０は給電装置、１１はモータ、１２は電
源、１３，１４はスイツチング素子、１９は検出
器Ａ、２０は検出器Ｂ、２１は設定器、２２は関
数発生器Ａ、２３は関数発生器Ｂ、２４は比較器
Ａ、２５は指令回路Ａ、２６は比較器Ｂ、２７は
指令回路Ｂ、２８は調整装置である。なお、図中
同一符号はそれぞれ同一または相当部分を示す。
FIG. 1 is a diagram showing the configuration of a conventional hot wire type arc welding device, FIG. 2 is a diagram showing the configuration of a hot wire type arc welding device according to an embodiment of the present invention, and FIG. 3 is a diagram showing the wire feeding speed and wire・A diagram showing the relationship between the voltage between the base metals, Figure 4 is a diagram showing how the bead shape changes depending on the combination of welding speed and wire feed speed, and Figure 5 is a diagram showing the relationship between welding current and wire feed speed. FIG. In the figure, 1 is a torch, 2 is a tungsten electrode, 4 is a wire, 7 is an arc, 8 is a bead, 9 is a base material, 10 is a power supply device, 11 is a motor, 12 is a power supply, 13 and 14 are switching elements, and 19 is a Detector A, 20 is detector B, 21 is setter, 22 is function generator A, 23 is function generator B, 24 is comparator A, 25 is command circuit A, 26 is comparator B, 27 is command Circuit B, 28 is a regulating device. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
流を供給する供給手段、溶接電流をＸ軸とし、フ
イラーワイヤ送給速度をＹ軸としたXY平面にお
ける、所望の溶接断面形状が得られる領域内に入
る関数が予め設定され、この関数により、設定さ
れた溶接電流に対してフイラーワイヤ送給速度を
規定する規定手段、フイラーワイヤ・母材間の電
圧とフイラーワイヤ送給速度とを変数とする関数
が予め設定され、この関数により、上記規定手段
で規定された上記フイラーワイヤ送給速度に対し
てフイラーワイヤ・母材間の電圧を設定する設定
手段、上記フイラーワイヤと母材間の電圧を検出
する検出手段、及び上記検出手段により検出され
た検出電圧が、上記設定手段により設定された設
定電圧と等しくなるように、上記ワイヤ加熱電流
を制御する制御手段を備えたホツトワイヤ式アー
ク溶接装置。1 Supply means for supplying wire heating current to the filler wire of the TIG welding machine, which enters the region where the desired welded cross-sectional shape can be obtained on the XY plane with the welding current as the X axis and the filler wire feeding speed as the Y axis A function is set in advance, and this function provides a regulating means for regulating the filler wire feeding speed for a set welding current, and a function that uses the voltage between the filler wire and the base metal and the filler wire feeding speed as variables. A setting means that is set in advance and uses this function to set a voltage between the filler wire and the base material for the filler wire feeding speed prescribed by the regulation means, and a setting means that detects the voltage between the filler wire and the base material. A hot wire type arc welding device comprising: a detection means; and a control means for controlling the wire heating current so that the detected voltage detected by the detection means is equal to the set voltage set by the setting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP158182A JPS58119468A (en) | 1982-01-08 | 1982-01-08 | Hot wire type arc welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP158182A JPS58119468A (en) | 1982-01-08 | 1982-01-08 | Hot wire type arc welding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58119468A JPS58119468A (en) | 1983-07-15 |
| JPS6355394B2 true JPS6355394B2 (en) | 1988-11-02 |
Family
ID=11505476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP158182A Granted JPS58119468A (en) | 1982-01-08 | 1982-01-08 | Hot wire type arc welding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58119468A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4774976B2 (en) * | 2005-12-15 | 2011-09-21 | マツダ株式会社 | Rear body structure of the vehicle |
| US9950383B2 (en) * | 2013-02-05 | 2018-04-24 | Illinois Tool Works Inc. | Welding wire preheating system and method |
-
1982
- 1982-01-08 JP JP158182A patent/JPS58119468A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58119468A (en) | 1983-07-15 |
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