JP2653326B2 - Pulse TIG welding method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an 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 provided with a positioning mechanism as shown in FIG. The torch 3 for TIG spot welding is grasped with the hand 7 and the tip 5 of the torch 3 for TIG spot welding is pressed from above the sheet material 2 in the direction of arrow 30 so that the TIG spot welding was performed with the spot welding switch 4 turned on. By performing the above operation several tens of times, the sheet material and the lead plate are joined.
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 to 8j are TIG spot welds.

According to Japanese Patent Application Laid-Open No. 56-163079 published on December 15, 1981, a pressure roller is provided on the left and right sides of the torch so as to be integrated with the torch. A TIG welding method for performing TIG welding while pressing is disclosed. However, in this method, the workpiece is moved under the torch by moving the backing metal on which the workpiece is mounted along the rail.

[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 for performing welding by providing a time lag to the operation of the clamp. However, in this method, a plurality of clamp mechanisms and a vertical mechanism of the welding torch are independently mounted.

[0006]

In the conventional method of joining a sheet material and a lead plate of a transformer as described above, in order to securely join the sheet material 2 and the lead plate 1, Further, in order to increase the bonding area between the sheet material 2 and the lead plate 1, dozens of TIG spot weldings have to be performed. On the other hand, since the area of the portion where the sheet material 2 and the lead plate 1 overlap is limited, the number of points where the TIG spot welding can be performed within the area is also limited. Therefore, the joining between the sheet material 2 and the lead plate 1 is ensured and the sheet material 2
Increasing the joint area between the lead plate 1 and the lead plate 1 has a problem in that it depends on the skill of a person skilled in the art.
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
In a state where the tip 5 of the torch 3 for TIG spot welding is often inclined with respect to the sheet material 2 as shown in FIG.
Since the sheet material 2 to be subjected to the TIG spot welding and the lead plate 1 cannot be brought into close contact with each other, a TIG spot welding failure occurs, and the joining between the sheet material 2 and the lead plate 1 cannot be performed reliably. There is a problem that a large joint area with the lead plate 1 cannot be obtained. Moreover,
When TIG spot welding is performed for joining the sheet material 2 and the lead plate 1, there is a problem that the spatter processing must be performed frequently because more spatter is easily generated than in pulse TIG welding. .

In the TIG welding method disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 56-163079, the backing metal on which the work is placed is moved along the rail to move the work under the torch. However, there is a problem that the apparatus configuration becomes large due to the movement of the apparatus.

[0008] In addition, the real HirakiAkira 62-202992
In the clamp device disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, 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.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has assured the joining between the sheet material and the lead plate, and has increased the joining 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, can easily control the torch up and down, and extremely reduce generation of spatter.

[0010]

In a pulse TIG welding method according to the present invention, a clamp jaw including a spring is divided and arranged above a connected member positioned on a base plate, and the clamp jaw is provided at a central portion of the clamp jaw. Disposing a torch for pulse TIG welding, disposing a linear moving mechanism for linearly moving the torch for pulse TIG welding, disposing a vertical mechanism for vertically moving the clamp tongue and the torch for pulse TIG welding and the linear moving mechanism, It moves the moving mechanism linearly, the elevator mechanism
The clamp claws and the pulse torch welding torch.
And the linear moving mechanism is lowered, and the clamp claws are used.
After clamping the connected member, the linear movement mechanism
By transporting the pulse torch welding torch,
The connecting members are continuously welded.

[0011] A pulse TIG welding apparatus according to the present invention comprises:
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 joint between the sheet material and the lead plate is subjected to pulse TIG welding from above the sheet material, and the heat of the pulse TIG welding is applied to the sheet material at the joint and the upper surface of the lead plate which comes into contact with the sheet material. Melt the parts,
The sheet material and the lead plate are welded.

[0013]

FIG. 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-mentioned conventional method. 9 (9a, 9b, 9c, 9d) is the lead plate 1
Guide 10 for simultaneously holding the sheet 2 and the sheet material 2 is a guide for guiding the vertical movement of the clamp 9 and 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, and 13 is an L-shaped plate 1.
2 is a plate for fixing, 14 is 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 moving mechanism constituted 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; 19, a mounting plate for attaching the torch 14 for pulse TIG welding to the linear moving mechanism 17;
Reference numeral 20 denotes a plate for fixing the linear movement mechanism 17 and the plate 13;
Is a cylinder in which the cylinder rod is fixed to the plate 20, 24 is a fixing plate of the cylinder, 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 on the lead plate 1 and fixed, and the sheet material 2 is further placed 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 move vertically independently to press the upper surface of the sheet material 2. Therefore, thermal distortion of the lead plate 1 and the sheet material 2 due to the heat of the pulse TIG welding can be reduced. On the other hand, the clamp claw 9 clamps the lead plate 1 and the sheet material 2 so that there is no gap, and at the same time, makes the distance X between the tip 15 of the torch for pulse TIG welding and the sheet material 2 constant within the pulse TIG welding range. Next, by turning on a start switch (not shown) for pulse TIG welding, a pulse TIG welding controller (not shown) automatically sets a preheating pulse and a preheating current to control preheating conditions. At the same time, the torch 14 for pulse TIG welding is moved by the linear moving mechanism 17 as shown in FIG.
As described above, the lead plate 1 is preheated by moving from the start point 26 of the preheating range Y in the direction of the arrow 29 at the preheating speed. Thereafter, the pulse torch torch 14 is moved to the starting point 2 of the welding range Z.
7, the welding speed is automatically changed to the welding speed by the linear moving mechanism controller (not shown), and the pulse TIG welding controller (not shown) is automatically turned on by a welding start command signal to the pulse TIG welding controller (not shown). The welding pulse and the welding current are set, and the lead plate 1 and the sheet material 2 in the welding range Z are joined. 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, performs pulse TIG welding by a welding completion command signal 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 the case where the sheet material of the transformer is joined to the lead plate. However, it is needless to say that the present invention can 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 between the lead plate and the sheet material by the clamp claws arranged so as to divide the pulse TIG welding range. Welding by thermal strain
Phenomenon of clamp claws due to deformation of the part and surroundings
Does not affect the adjacent clamp claws, and the lead plate and sheet
Since the gap between materials can be kept at 0, welding conditions can be secured and signal
Reliable welding can be performed.

In addition, continuous pulse TIG welding is required.
Makes it possible to form a strip weld joint compared to the conventional multi-point spot.
And secures the joint area and eliminates welding errors
The generation of spatters such as scattering of molten pieces of the base metal
You.

Further, a person positions and fixes the lead plate on a base plate provided with a positioning mechanism, positions and fixes the lead plate, stacks a sheet material on the lead plate, and performs 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 and perform TIG spot welding. 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 to perform the TIG. The operation of turning on the spot welding switch and performing TIG spot welding is repeated several tens of times. 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 mounting the workpiece and moving along the rail is not required, the configuration of the apparatus can be reduced in size.

Further, the clamps which are divided and arranged
The welding, torch and linear moving mechanism are simultaneously operated by the vertical mechanism.
The vertical movement can be easily controlled.

[Brief description of the 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 one embodiment of the welding apparatus 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 welding portion according to the present invention.

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

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]

DESCRIPTION OF SYMBOLS 1 Lead plate 2 Sheet material 9 Clamping 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 Cable of torch for pulse TIG welding 17 Linear moving mechanism 19 Mounting plate 20 Plate 22 Base plate 23 Cylinder 24 Fixing plate 25 Wall

Claims (2)

(57) [Claims] 1. A clamp jaw incorporating a spring is divided and arranged above a connected member positioned on a base plate, a pulse TIG welding torch is arranged at a central portion of the clamp jaw, and the pulse TIG welding torch is provided. A linear moving mechanism for linearly moving the clamp pawl, a torch for pulse pulse welding and a vertical mechanism for moving the linear moving mechanism up and down , and the clamp pawl and the pulse table by the vertical mechanism.
Lowering the torch and the linear moving mechanism
After clamping the connected member with the clamp claws,
Carrying the pulse torch torch by wire moving mechanism
A pulsed TIG welding method, wherein the connected members are continuously welded. 2. A clamp jaw having a built-in spring which is divided and arranged above an connected member positioned on a base plate; a pulse torch welding torch arranged at a center of the clamp jaw; A linear moving mechanism for linearly moving the torch; and a vertical mechanism for raising and lowering the clamp jaw, the pulse torch welding torch and the linear moving mechanism, and moving the linear moving mechanism linearly and moving the vertical mechanism up and down. Parusutigu welding device comprising a Turkey is.