JPH0663753A - Pulse tig welding method and device - Google Patents

Abstract

PURPOSE:To provide a welding method and a device for surely joining the sheet material and the reed plate of a transformer, extending the joining area of the sheet material and the reed plate and extremely reducing the generation of spatters and further, drastically reducing the manufacturing time of the transformer. CONSTITUTION:The pulse TIG welding method and device are provided where the reed plate 1 and the sheet material 2 are superposed, positioned and fixed on a base 22 provided with a positioning mechanism, the whole equipment is lowered by a cylinder 23, the reed plate 1 and the sheet material 2 are stuck to each other by clamping pawls 9 arranged separately, pulse TIG welding is performed from above the sheet material while moving a pulse TIG welding torch 14 by a straight line moving mechanism 17 and the reed plate 1 and the sheet material 2 are joined together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for continuously welding a sheet material used in a transformer and a lead plate serving as a terminal for connection by pulse tig welding.

[0002]

2. Description of the Related Art In the conventional joining of a sheet material and a lead plate of a transformer, a spot point is manually set and then TIG spot welding is performed.

In a conventional method of joining a sheet material of a transformer and a lead plate, a person positions and fixes the lead plate 1 on a base plate 22 having a positioning mechanism as shown in FIG. The sheet material 2 is superposed on the sheet material, the torch for TIG spot welding is gripped by the hand 7, and the tip 5 of the torch for TIG spot welding is pressed in the direction of the arrow 30 from above the sheet material 2 to perform TIG spot welding. The switch 4 was turned on to perform TIG spot welding. The sheet material and the lead plate are joined by performing the above operation several tens of times. Figure 6
FIG. 3 is a perspective view of a portion where the sheet material 2 and the lead plate 1 are joined by TIG spot welding. 8a-8j are TIG spot welding parts. As shown in the figure, the TIG spots are welded so that they are aligned.

Further, according to Japanese Patent Laid-Open No. 56-163079 published on Dec. 15, 1981, pressure rollers provided so as to be integrated with the torch are provided on the left and right sides of the torch. A TIG welding method of performing TIG welding while pressing is disclosed. However, in this method, the tray to be welded is moved along the rail to move the workpiece below the torch.

Further, according to Japanese Unexamined Patent Publication No. 62-202992, published on December 24, 1987, a clamp mechanism is provided which clamps a thin plate material by a plurality of pressing means which move up and down. There is disclosed a clamp device that performs welding by providing a time lag in the operation of. However, in this method, a plurality of clamp mechanisms and a welding torch up-and-down mechanism are independently mounted.

[0006]

In the method of joining the sheet material 2 of the transformer and the lead plate 1 as described above, the sheet material 2 is used.
In order to ensure the joining between the lead plate 1 and the lead plate 1 and to increase the joining area between the sheet material 2 and the lead plate 1, dozens of points of TIG spot welding had to be performed. On the other hand, since the area of the overlapping portion of the sheet material 2 and the lead plate 1 is limited, the number of points in which TIG spot welding can be performed within the area is also limited. Therefore, the joining of the sheet material 2 and the lead plate 1 is surely performed, and the sheet material 2 is
Increasing the bonding area between the lead plate 1 and the lead plate 1 has a problem that it depends on the skill of a person.
In addition, a person presses the torch 3 for TIG spot welding from above the sheet material 2 and turns on the TIG spot welding switch 4 to perform tens of TIG spot welding. However, as shown in FIG. 7, when the tip 5 of the torch 3 for TIG spot welding is inclined with respect to the sheet material 2, it is not possible to bring the sheet material 2 and the lead plate 1 for TIG spot welding into close contact with each other. There are problems that spot welding becomes defective, the sheet material 2 and the lead plate 1 cannot be reliably joined, and the joining area between the sheet material 2 and the lead plate 1 cannot be increased. In addition, when TIG spot welding is performed to join the sheet material 2 and the lead plate 1, spatter is more likely to occur than in pulse TIG welding, and thus the spatter process must be performed frequently. was there.

Further, in the TIG welding method disclosed in the above-mentioned Japanese Patent Laid-Open No. 56-163079, the object to be welded is moved under the torch by moving the tray on which the object to be welded is moved along the rail. Therefore, there is a problem that the device configuration becomes large.

Further, the above-mentioned JP-A-62-202992.
In the clamp device disclosed in the publication, there is a problem that the control mechanism is complicated because the plurality of clamp mechanisms and the vertical mechanism of the welding torch must be controlled independently.

The present invention has been made in order to solve the above problems, and ensures the bonding between the sheet material and the lead plate, and increases the bonding area between the sheet material and the lead plate.
Further, it is another object of the present invention to provide a welding method and apparatus which are small in size, whose torch can be easily controlled up and down, and in which spatter generation is extremely reduced.

[0010]

In the welding method according to the present invention, clamp claws having a built-in spring are divided and arranged above the connected member positioned on the base plate,
A pulse TIG welding torch is arranged in the central portion of the clamp claw, and a linear movement mechanism for linearly moving the pulse TIG welding torch is arranged, and a vertical mechanism for moving the clamp claw, the pulse TIG welding torch, and the linear movement mechanism up and down. Are arranged, the linear movement mechanism is linearly moved, and the up-and-down mechanism is moved up and down to continuously pulse-tig-weld the connected member.

The welding apparatus according to the present invention includes a clamp claw having a built-in spring, which is dividedly arranged above the non-connecting member positioned on the base plate, and a pulse tig welding torch arranged at the center of the clamp claw. And a linear movement mechanism that linearly moves the pulse TIG welding torch, and a vertical movement mechanism that moves the clamp claw, the pulse TIG welding torch, and the linear movement mechanism up and down.The linear movement mechanism linearly moves the connected member. Pulse TIG welding continuously.

[0012]

According to the present invention, the joining portion between the sheet material and the lead plate is pulse-tig welded from above the sheet material, and the sheet material of the joining portion and the upper surface of the lead plate which comes into contact with the sheet material by the heat of the pulse-tig welding. Melt the part,
Weld the sheet material and the lead plate.

[0013]

1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a left side view of FIG. 1 and 2, 1, 2, and 22 are exactly the same as the above conventional method. 9 (9a, 9b, 9c, 9d) is the lead plate 1
Clamp tabs 10 for holding the sheet material 2 and the sheet material 2 at the same time are guides for guiding the vertical movement of the clamp tabs 1, 1
1 (11a, 11b) is a spring built in the clamp claw 9, 12 (12a, 12b, 12c, 12d) is an L-shaped plate for fixing the guide 10, 13 is an L-shaped plate 1
A plate for fixing 2 and a torch for pulse TIG welding,
15 is the tip of the torch for pulse TIG welding, 16 is the cable of the torch for pulse TIG welding, 17 is, for example,
A moving device which is composed of a motor, a ball screw and a guide, and has a function of moving the torch 14 for pulse TIG welding in the direction of arrow 18, 19 is a mounting plate for attaching the torch 14 for pulse TIG welding to the moving device 17, and 20 is a moving device 17 A plate for fixing the plate 13; a cylinder 23 for fixing a cylinder rod to the plate 20; a cylinder fixing plate 24; and a wall 25 for fixing the fixing plate 24.

Next, the operation of the above embodiment will be described with reference to FIG. First, as shown in FIG.
The lead plate 1 is positioned and fixed on the above, and the sheet material 2 is further overlapped on the lead plate 1 and positioned and fixed. Next, as shown in FIG. 3, the lowering switch (not shown) of the cylinder 23 is turned on to turn on the cylinder 23.
To lower the entire Pulsington welding machine.
The pressure of the cylinder 23 is divided by the spring 11 into the pulse-tone welding range and the clamp claws 9 are arranged.
Be transmitted to. The clamp claws 9 independently move in the vertical direction to press the upper surface of the sheet material 2. Therefore, heat distortion of the lead plate 1 and the sheet material 2 due to the heat of pulse TIG welding can be removed. On the other hand, clamp claw 9
Clamps the lead plate 1 and the sheet material 2 so that there is no gap, and at the same time, the distance X between the tip 15 of the torch for pulse TIG welding and the sheet material 2 in the pulse TIG welding range.
To be constant. Next, by starting a start switch for pulse TIG welding (not shown), a pulse TIG welding controller (not shown) automatically sets a preheating pulse and a preheating current to control the preheating condition. At the same time, the moving device 17 moves the torch 14 for pulse TIG welding from the starting point 26 of the preheating range Y in the direction of the arrow 29 at a preheating rate to preheat the lead plate 1. After that, when the pulse TIG welding torch 14 reaches the start point 27 of the welding range Z, the moving device controller (not shown) automatically changes the welding speed to a welding speed, and a welding start command signal (not shown) to the pulse TIG welding controller (not shown) is used. The pulse TIG welding controller automatically sets the welding pulse and welding current to join the lead plate 1 and the sheet material 2 in the welding range Z. Next, when the pulse TIG welding torch 14 reaches the welding end point 28, the moving device controller (not shown) automatically stops the moving device 17, and at the same time the pulse TIG welding controller receives a welding completion command signal to the pulse TIG welding controller. Automatically complete pulse tig welding.

In the above description, the present invention has been described for the case of joining the sheet material of the transformer and the lead plate, but it goes without saying that the present invention can also be used for joining other materials.

[0016]

As described above, according to the present invention, the lead plate and the sheet material are clamped by the clamp claws arranged by dividing the pulse TIG welding range. The influence of strain due to heat generation can be reduced and the interphase gap between the lead plate and the sheet material can be maintained at 0, which facilitates the setting of welding conditions.

Further, since the divided clamp claws, the torch for pulse TIG welding and the moving device are integrally moved up and down, the distance X between the tip of the torch for pulse TIG welding and the sheet material can be kept constant. Therefore, it is possible to easily set the distance between the tip of the torch for pulse TIG welding and the sheet material, which is one of the necessary conditions for performing pulse TIG welding. Can be reliably joined.

Further, when the TIG spot welding is performed manually, the tip of the TIG spot welding torch may be tilted with respect to the sheet material.
As described above, since the distance X can be kept constant, one of stable welding conditions can be secured, so that the generation of spatter can be extremely reduced.

Further, a person positions and fixes the lead plate on a base plate having a positioning mechanism, positions and fixes the lead plate, and stacks a sheet material on the lead plate for Tig spot welding. Hold the torch by hand, press the tip of the torch for TIG spot welding in the direction of arrow 30 from above the sheet material, turn on the TIG spot welding switch to perform TIG spot welding, and after the TIG spot welding is completed, Lift the torch for spot welding, move the torch for TIG spot welding to the next TIG spot welding point, and press the tip of the torch for spot welding in the direction of arrow 30 from above the sheet material. The operation of turning on the spot welding switch and performing TIG spot welding was repeated several tens of times to perform TIG spot welding. Compared to method of joining over preparative material and the lead plate, welding method and apparatus according to the present invention, it is possible to perform Parusutigu welding continuously, it is possible greatly shorten the bonding time.

Further, since the tray for placing the object to be welded and moving along the rail is not required, the device structure can be made compact.

Further, since the plurality of clamp mechanisms and the vertical movement mechanism of the welding torch are simultaneously moved, the vertical movement of the torch and the clamp can be easily controlled.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a welding apparatus according to the present invention.

FIG. 2 is a left side view of an embodiment of the welding device according to the present invention.

FIG. 3 is an operation explanatory view of the welding method and apparatus according to the present invention.

FIG. 4 is a perspective view of a welded portion according to the present invention.

FIG. 5 is a cross-sectional view of a conventional welding device for welding a sheet material of a transformer and a lead plate.

FIG. 6 is a perspective view of a conventional welding portion for welding a sheet material and a lead plate of a transformer.

FIG. 7 is an operation explanatory view of a conventional welding device for welding a sheet material of a transformer and a lead plate.

[Explanation of symbols]

 1 lead plate 2 sheet material 9 clamp claw 10 guide 11 spring 12 L-shaped plate 13 plate 14 torch for pulse TIG welding 15 torch tip for pulse TIG welding 16 cable torch 17 for pulse TIG welding 19 mounting device 20 plate 22 Base plate 23 Cylinder 24 Fixing plate 25 Wall

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[Procedure amendment]

[Submission date] January 19, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title: Pulse tig welding method and apparatus

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for continuously welding a sheet material used in a transformer and a lead plate serving as a terminal for connection by pulse tig welding.

[0002]

BACKGROUND ART bonding between the sheet material and the lead plate of the conventional transformers, welding was done by the hand.

In a conventional method of joining a sheet material of a transformer and a lead plate, a person positions and fixes the lead plate 1 on a base plate 22 having a positioning mechanism as shown in FIG. The sheet material 2 is laid on top of the sheet material, the torch 3 for TIG spot welding is grasped by the hand 7, and the tip 5 of the torch 3 for TIG spot welding is pressed in the direction of the arrow 30 from above the sheet material 2 to TIG spot welding was performed by turning on the spot welding switch 4. The sheet material and the lead plate are joined by performing the above operation several tens of times.
FIG. 6 is a perspective view of a portion where the sheet material 2 and the lead plate 1 are joined by TIG spot welding. 8a-8j are TIG spot welding parts.

Further, according to Japanese Patent Laid-Open No. 56-163079 published on Dec. 15, 1981, pressure rollers provided so as to be integrated with the torch are provided on the left and right sides of the torch. A TIG welding method of performing TIG welding while pressing is disclosed. However, in this method, the backing metal on which the object to be welded is placed is moved along the rail to move the object to be welded under the torch.

[0005] Further, according to the actual HirakiAkira 62-202992 JP, published 1987 December 24, these clamps have clamping mechanism for clamping a plurality of pressing means for vertically moving the sheet material There is disclosed a clamp device that performs welding by providing a time lag in the operation of. However, in this method, a plurality of clamp mechanisms and a welding torch up-and-down mechanism are independently mounted.

[0006]

In the conventional joining method of the sheet material and the lead plate of the above-mentioned voltage transformer, in order to ensure the joining of the sheet material 2 and the lead plate 1, Further, in order to increase the joint area between the sheet material 2 and the lead plate 1, dozens of points of TIG spot welding had to be performed. On the other hand, since the area of the overlapping portion of the sheet material 2 and the lead plate 1 is limited, the number of points in which TIG spot welding can be performed within the area is also limited. Therefore, the joining of the sheet material 2 and the lead plate 1 is surely performed, and the sheet material 2 is
Increasing the bonding area between the lead plate 1 and the lead plate 1 has a problem that it depends on the skill of a person.
Also, people have that have been TIG spot welding also TIG torch 3 for spot welding by pressurized from the top of the sheet material 2 TIG spot welding switch 4 to put several ten-point
Because, in the Often a state where the top 5 of the torch 3 for TIG spot welded to the sheet material 2 is inclined as shown in FIG. 7,
Since the sheet material 2 and the lead plate 1 which are to be subjected to the TIG spot welding cannot be brought into close contact with each other, a TIG spot welding failure occurs, and the sheet material 2 and the lead plate 1 cannot be reliably joined to each other. There has been a problem that the bonding area with the lead plate 1 cannot be increased. Moreover,
When TIG spot welding is used to join the sheet material 2 and the lead plate 1, spatter is more likely to occur than in pulse TIG welding, so that there is a problem in that the spatter process must be performed frequently. .

Further, in the TIG welding method disclosed in the above-mentioned Japanese Patent Laid-Open No. 56-163079, the backing metal on which the object to be welded is placed is moved along the rail to move the object to be welded under the torch. However, there is a problem in that the device configuration becomes large because it is moved to.

[0008] In addition, the real HirakiAkira 62-202992
In the clamp device disclosed in the publication, there is a problem that the control mechanism is complicated because the plurality of clamp mechanisms and the vertical mechanism of the welding torch must be controlled independently.

The present invention has been made in order to solve the above problems, and ensures the bonding between the sheet material and the lead plate, and increases the bonding area between the sheet material and the lead plate.
Further, it is another object of the present invention to provide a welding method and apparatus which are small in size, whose torch can be easily controlled up and down, and in which spatter generation is extremely reduced.

[0010]

In the pulse TIG welding method according to the present invention, a clamp claw having a built-in spring is divided and arranged above the connected member positioned on the base plate, and the central part of the clamp claw is arranged. Arranging a pulse TIG welding torch, arranging a linear movement mechanism for linearly moving the pulse TIG welding torch, arranging the clamp claw and the pulse TIG welding torch and an up-down mechanism for moving the linear movement mechanism up and down, the straight line It moves the moving mechanism linearly, the elevator mechanism
The clamp claw and the pulse tig welding torch
And lower the linear movement mechanism, and use the clamp claws
After clamping the connected members, the linear movement mechanism
By carrying the pulse tig welding torch,
Weld the connecting members continuously.

The pulse tig welding apparatus according to the present invention is
And Kuranputsume with built-arranged spring is divided into an upper portion of the connecting member positioned in the base plate,
And Parusutigu welding torches arranged on a central portion of the Kuranputsume, and a linear moving mechanism for moving the Parusutigu welding torch linearly, the Kuranputsume, raise or lower the <br/> Parusutigu welding torch and the linear movement mechanism Ru equipped with up and down mechanism.

[0012]

According to the present invention, the joining portion between the sheet material and the lead plate is pulse-tig welded from above the sheet material, and the sheet material of the joining portion and the upper surface of the lead plate which comes into contact with the sheet material by the heat of the pulse-tig welding. Melt the part,
Weld the sheet material and the lead plate.

[0013]

1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a left side view of FIG. 1 and 2, 1, 2, and 22 are exactly the same as the above conventional method. 9 (9a, 9b, 9c, 9d) is the lead plate 1
Clamp tabs 10 for holding the sheet material 2 and the sheet material 2 at the same time are guides for guiding the vertical movement of the clamp tabs 1, 1
1 (11a, 11b) is a spring built in the clamp claw 9, 12 (12a, 12b, 12c, 12d) is an L-shaped plate for fixing the guide 10, 13 is an L-shaped plate 1
A plate for fixing 2 and a torch for pulse TIG welding,
15 is the tip of the torch for pulse TIG welding, 16 is the cable of the torch for pulse TIG welding, 17 is, for example,
A linear movement mechanism configured by a motor, a ball screw, and a guide and having a function of moving the torch 14 for pulse TIG welding in the direction of arrow 18, a mounting plate 19 for attaching the torch 14 for pulse TIG welding to the linear movement mechanism 17,
20 is a plate for fixing the linear movement mechanism 17 and the plate 13, 23
Is a cylinder having a cylinder rod fixed to the plate 20, 24 is a cylinder fixing plate, and 25 is a wall for fixing the fixing plate 24.

Next, the operation of the above embodiment will be described with reference to FIG. First, as shown in FIG.
The lead plate 1 is positioned and fixed on the above, and the sheet material 2 is further overlapped on the lead plate 1 and positioned and fixed. Next, as shown in FIG. 3, the lowering switch (not shown) of the cylinder 23 is turned on to turn on the cylinder 23.
Lowering the entire Parusute I grayed welding device by. Pressure in the cylinder 23 is transmitted to Kuranputsume 9 arranged by dividing the Parusute I grayed <br/> weld region via a spring 11. The clamp claws 9 independently move in the vertical direction to press the upper surface of the sheet material 2. Therefore, heat distortion of the lead plate 1 and the sheet material 2 due to the heat of pulse TIG welding can be removed. On the other hand, the clamp claws 9 clamp the lead plate 1 and the sheet material 2 so that there is no gap therebetween, and at the same time, keep the interval X between the tip 15 of the pulse TIG welding torch and the sheet material 2 within the pulse TIG welding range. Next, by turning on a start switch of pulse TIG welding (not shown), a pulse TIG welding controller (not shown) automatically sets a preheating pulse and a preheating current to control the preheating condition. At the same time, the torch 14 for pulse TIG welding is moved by the linear movement mechanism 17 as shown in FIG.
Thus, the lead plate 1 is preheated by moving from the starting point 26 of the preheating range Y in the direction of the arrow 29 at the preheating speed. Then, the pulse TIG welding torch 14 starts at the starting point 2 of the welding range Z.
7, the linear movement mechanism controller (not shown) automatically changes the welding speed, and a pulse start welding controller (not shown) automatically causes the pulse TIG welding controller (not shown) to automatically change the welding speed by a welding start command signal to the pulse TIG welding controller (not shown). The welding pulse and welding current are set to join the lead plate 1 and the sheet material 2 in the welding range Z. Next, when the pulse TIG welding torch 14 reaches the welding end point 28, the linear movement mechanism controller (not shown) automatically stops the linear movement mechanism 17, and at the same time, a pulse completion welding command signal is sent to the pulse TIG welding controller. The controller automatically completes the pulse tig welding.

In the above description, the present invention has been described for joining the sheet material of the transformer and the lead plate, but it goes without saying that the present invention can also be used for joining other members to be joined .

[0016]

As described above, according to the present invention, the lead plate and the sheet material are clamped by the clamp claws arranged by dividing the pulse TIG welding range. Welding by heat distortion
Lifting phenomenon of clamp claws due to deformation of parts and surroundings
Does not affect the adjacent clamp claws, and the lead plate and sheet
Since the interphase gap of the material can be maintained at 0, welding conditions can be secured
Highly reliable welding is possible.

Further , it is necessary to continuously perform pulse TIG welding.
With this, band welding can be performed compared to conventional multi-point spots.
It is possible to secure the joint area, and there are no welding mistakes.
The occurrence of spatter such as the scattering of molten pieces of the base material is minimal.
It

Further, a person positions and fixes the lead plate on a base plate having a positioning mechanism, positions and fixes the lead plate, and stacks a sheet material on the lead plate for Tig spot welding. Hold the torch by hand, press the tip of the torch for TIG spot welding in the direction of arrow 30 from above the sheet material, turn on the TIG spot welding switch to perform TIG spot welding, and after the TIG spot welding is completed, Lift the torch for spot welding, move the torch for TIG spot welding to the next TIG spot welding point, and press the tip of the torch for spot welding in the direction of arrow 30 from above the sheet material. The operation of turning on the spot welding switch and performing TIG spot welding was repeated several tens of times to perform TIG spot welding. Compared to method of joining over preparative material and the lead plate, welding method and apparatus according to the present invention, it is possible to perform Parusutigu welding continuously, it is possible greatly shorten the bonding time.

Further, since the backing metal for carrying the object to be welded and moving along the rail is not required, the device structure can be made compact.

Further, the clamp tools arranged in a divided manner
Simultaneous movement of the welding mechanism, welding torch and linear movement mechanism
Since it is configured to move up and down , the up and down movement can be easily controlled.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a welding apparatus according to the present invention.

FIG. 2 is a left side view of an embodiment of the welding device according to the present invention.

FIG. 3 is an operation explanatory view of the welding method and apparatus according to the present invention.

FIG. 4 is a perspective view of a welded portion according to the present invention.

FIG. 5 is a cross-sectional view of a conventional welding method for welding a sheet material of a transformer and a lead plate.

FIG. 6 is a perspective view of a conventional welding portion for welding a sheet material and a lead plate of a transformer.

FIG. 7 is an operation explanatory view of a conventional welding method for welding a sheet material of a transformer and a lead plate.

[Explanation of symbols] 1 lead plate 2 sheet material 9 clamp claw 10 guide 11 spring 12 L-shaped plate 13 plate 14 torch for pulse TIG welding 15 tip of torch for pulse TIG welding 16 torch cable for pulse TIG welding 17 linear movement mechanism 19 Mounting plate 20 Plate 22 Base plate 23 Cylinder 24 Fixing plate 25 Wall

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

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[Figure 3]

Claims (2)

[Claims] 1. A clamp claw having a built-in spring is dividedly arranged above a connected member positioned on a base plate, and a pulse TIG welding torch is arranged at the center of the clamp claw, and the pulse TIG welding torch is arranged. A linear moving mechanism for linearly moving the clamp claw, the pulse TIG welding torch, and a vertical mechanism for moving the linear moving mechanism up and down are arranged, and the linear moving mechanism is linearly moved, and the vertical moving mechanism. A pulse tig welding method, characterized in that a connected member is continuously welded by moving up and down. 2. A clamp claw having a built-in spring, which is dividedly arranged above the non-connecting member positioned on the base plate, a pulse TIG welding torch arranged in the center of the clamp claw, and the pulse TIG welding. A linear movement mechanism for linearly moving the torch, a vertical movement mechanism for moving the clamp claw, the pulse TIG welding torch, and the linear movement mechanism up and down are provided, and the linear movement mechanism is linearly moved, and the vertical movement mechanism is moved up and down. A pulse tig welding device characterized in that the members to be connected are continuously welded by doing so.