JPH115165A - Torch kicker device for arc welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the torch kicker device which enables to move automatically at a constant speed, holding a torch at a right position against a welding portion. SOLUTION: This moving device comprises, a running member 20 to set the torch 6 against the welding portion, a rail 11 to guide the running member 20 to run, holding the torch 6, arranged along the welding positions on the line and set on the running member 20, at a given distance facing against the welding portion, and a driving motor 23 which reciprocates the running member 20 along the rail 11 over the welding positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torch feeding device for arc welding for automatically feeding a torch along a welding portion of a workpiece to be welded.

[0002]

2. Description of the Related Art In FIG. 5, a welding jig 9 has a base end portion pivotally connected to an upper and lower frame 3, 3a having a front end opening so as to hold a work. It is configured by attaching a pair of heat-absorbing work holding blocks 5 and 5a which are spaced apart from each other while leaving a copper work holding block 4 exhibiting heat absorption and a front-side gap 7. Reference numeral 8 denotes a water passage through which cooling water passes. For example, when the roof panel 1 and the quarter panel 1a are arc-welded, the welding jig 9 is hung on the wire 9a and conveyed by the carrier, the welding portion 2 is held in an open state, and the tip is locked and closed. . In this state, the gap 7 between the work holding blocks 5 and 5 a holding the welded portion 2 with the work holding block 4.
And the torch 6 was inserted into the welding portion 2 by hand.

[0003]

Therefore, the setting and the feed rate of the torch depend on the operator's experience, and it is necessary to inspect whether or not a welding defect occurs due to these variations. This also required rework.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a torch feeding device for arc welding which secures an appropriate position of a torch with respect to a welding portion and enables automatic feeding at a constant speed. .

[0005]

In order to achieve this object, according to the present invention, according to the present invention, a traveling member for setting a torch toward a welding portion, and a running member arranged along a linear welding portion are provided. And a rail for guiding the traveling member so that the torch set on the traveling member is run at a constant distance perpendicular to the welding portion and traveling, and the traveling member is reciprocated along the rail along the rail. And a driving motor.

When the motor is operated, the traveling member travels along the rail, and the torch set on the traveling member is automatically fed at a set speed of the motor while maintaining a constant distance perpendicular to the welding site.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An arc welding torch feeder according to an embodiment of the present invention applied to the welding jig 9 described in FIG. 5 will be described with reference to FIGS. In the peripheral frame 3 of the welding jig 9 described in FIG. 5, groove-shaped rails 11 on both sides are perforated so as to be mounted on the heat-absorbing work holding blocks 5, 5a, and a horizontal rail is formed on one upper surface. Rack 1
The rail member 10 on which the second member 2 is formed is attached.

Reference numeral 20 denotes a plate-shaped traveling member which travels along the rail 11, and has pins 21 provided at the front and rear portions, and has a torch set hole 22 for setting the torch 6 as shown in FIG. I have. The torch 6 is provided with a ring-shaped stopper 28. Further, a motor 23 having a pinion 24 meshing with the rack 12 mounted on a rotating shaft passing through a reduction gear is mounted on the traveling member 20, and slides a pole 26 erected on the traveling member 20 in a guide hole 23 b of the bracket 23 a. It is inserted as much as possible and mounted with two tension springs 27 on both sides. Further, an operation switch 29c for returning the traveling member 20 is provided.

Both ends of the front and rear pins 21 are rails 11
As shown in FIG. 2, these pins 21 are guided by these pins 21 so as to be slidable into the torch set holes 2.
The torch 6 set to 2 is formed in a curved shape so as to be set at a constant distance straight on the curved welding portion 2. At both ends of the rack 12, limit switches 29a and 2b for detecting the original position and the front end position of the pinion 24 are provided.
9b is attached.

The motor 23 is provided with a control circuit 29 for controlling the reciprocating motion of the traveling member 20 and the power supply timing. That is, when the energizing switch provided on the torch 6 is turned on, the motor 23 is rotated forward at a constant speed through the drive circuit 23c, and at the same time the arc energization is started. When the traveling member 20 moves forward and the pinion 24 comes into contact with the limit switch 29b, the normal rotation of the motor 23 is stopped and at the same time the arc energization is stopped. When the operation switch 29c is operated, the motor 23 is rotated in the reverse direction, and the traveling member 20 is moved back to the position where the limit switch 29a operates.

The operation of the torch feeding device 19 for arc welding configured as described above will be described with reference to FIG. In the original position of the traveling member 20, the pin 21 occupies the right end position shown by a two-dot chain line along the curved surface of the rail 11, and the torch 6 It is located perpendicular to the end. When the energizing switch is operated while holding the torch 6 in hand, the torch 6 moves forward at the same time as energization is started, and at a substantially constant speed while maintaining a constant distance perpendicular to the welding site 2, the front end shown in the figure. Stops energizing when it reaches the position. When the torch 6 is removed and the operation switch 29c is operated, the traveling member 20 returns to the original position.

In the above-described embodiment, a case has been described in which a heat-absorbing work holding block is provided, but when these are not provided, the rails on both sides are directly set on the work. It is also conceivable to provide, for example, a lock member using a magnet in the torch set hole 22 so that the lock member is retained even when the vehicle is run with the hand released from the torch 6. At two symmetrical positions around the torch set hole 22,
By providing a touch sensor for detecting that the stopper 28 of the torch 6 is set, the return movement can be automatically started when the touch sensor no longer detects the stopper 28.

[0013]

According to the present invention, stable and good welding quality can be obtained without being influenced by the degree of thermal refining of an operator during arc welding, and the number of rework steps is reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an arc welding torch feeder according to an example of an embodiment of the present invention.

FIG. 2 is a side view of a rail member of the torch feeding device for arc welding.

FIG. 3 is a perspective view of a traveling member of the torch feeding device for arc welding.

FIG. 4 is a side view for explaining the operation of the torch feeding device for arc welding.

5A and 5B illustrate a conventional welding jig. FIG. 5A is a side view before a work set, and FIG. 5B is a cross-sectional view after the work set.

[Explanation of symbols]

 Reference Signs List 6 torch 9 welding jig 10 rail member 11 rail 12 rack 20 traveling member 22 torch set hole 23 motor 24 pinion

Claims (2)

[Claims] 1. A traveling member for setting a torch toward a welding portion, and a torch disposed along the line-shaped welding portion, wherein the torch set on the traveling member is perpendicular to the welding portion. An arc comprising: a rail that guides the traveling member so as to travel while holding the same at a fixed distance; and a motor that drives the traveling member to reciprocate the welding portion along the rail. Torch feeder for welding. 2. A rack is provided in a horizontal direction along a rail, and a motor having a pinion meshing with the rack on a rotating shaft is attached to a traveling member via a tension spring. Torch feeder for arc welding.