JP2561406B2 - Filler wire feeder for TIG welding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filler wire supply device for a TIG welding device which automatically supplies a filler wire to a welding point in inert gas tungsten arc welding (TIG welding).

[0002]

2. Description of the Related Art A conventional filler wire feeder for an automatic TIG welding apparatus is one in which a filler wire nozzle that guides the unwinding of the filler wire is fixed to a welding torch. Or move.

[0003]

Therefore, when the welding torch moves and turns, the filler wire nozzle also moves and turns together with the welding torch, so that the filler wire nozzle also turns and turns. Therefore, it is necessary to align the tip positions of the welding torch and the filler wire during welding.

Further, since the filler wire nozzle and the filler wire inserted therein are disposed close to the welding torch, the filler wire does not interfere with the welding torch or the welding device member during the swinging and turning operation. Therefore, the equipment arrangement and the equipment structure around the welding torch are complicated.

The object of the present invention was proposed in view of the above problems of the conventional filler wire supplying device. It is unnecessary to align the welding torch and the tip end position of the filler wire at the time of welding, and the filler wire is swung around. It is an object of the present invention to provide a filler wire feeder devised so that the operation is unnecessary and the equipment arrangement around the welding torch and the structure for feeding and supplying the filler wire are simplified.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a welding torch fixed to a rotor of a torch turning drive source through a mounting arm, and a center line of rotation of the rotor is welded. It is characterized in that it is configured to coincide with the payout center line of the filler wire paid out toward the point.

[0007]

[Function] Since the center line of rotation of the rotor of the torch rotation drive source coincides with the center line of the filler wire that is fed toward the welding point, only the welding torch is rotated at an arbitrary position for positioning. However, the tip of the filler wire always coincides with the welding point, which is the tip position of the welding torch. This eliminates the need for positioning the welding torch and the tip end position of the filler wire during welding.

Since the filler wire does not swirl, the structure for feeding and supplying the filler wire is simple, and there is no possibility that the filler wire interferes with the welding torch, the welding device member or the like.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of a main part of a filler wire feeder according to the present invention, and FIG. 2 is a front view of a TIG welding apparatus to which the filler wire feeder is applied. A torch turning drive source, for example, a rotary actuator 3 is attached to the welding device frame 1, and a rotor 5 of the rotary actuator 3 is connected to a base shaft 9 of an attachment arm 7.

A torch mounting seat 13 having a recess 11 is provided at the tip of the mounting arm 7, and a mounting portion 1 for the welding torch 15 is provided.
Mounting body 19 in which 7 is joined to the joining surface of the torch mounting seat 13.
It is sandwiched between the recessed portion 21 of the torch mounting seat 13 and the recessed portion 11 of the torch mounting seat 13, and the torch mounting seat 13 and the mounting body 19 are fixed by bolts 22.
Are fixed to each other.

The recess 11 and the recess 21 are formed in a semicircular cross section, and when the mounting body 19 is sandwiched between the recess 11 and the recess 21, the centerline C (gas blowout centerline) of the welding torch 15 is The mounting arm 7 and the torch mounting seat 13, so that the center line C intersects the rotation center line L at the welding point P at a certain angle α with respect to the rotation center line L of the rotor 5 of the rotary actuator 3. The mounting body 19 is formed.

A filler wire nozzle 25 for guiding the unwinding of a filler wire 23, which is a welding rod, is attached to the welding device frame 1, and a guide hole 27 of the filler wire nozzle 25 coincides with a rotation center line L of the rotor 5. Is set to. The filler wire 23 is wound around a rotatable wire reel 29, and is fed from a guide hole 27 of the filler wire nozzle 25 toward a welding point P via a wire feeding device 31.

The filler wire 23 may be inserted into the guide hole 27 of the filler wire nozzle 25 through a hollow hole formed in the vicinity of the rotation center line L of the rotary actuator 3, or the rotary actuator 3 may be used.
A structure may be adopted in which the guide wire 27 is drawn from the base of the filler wire nozzle 25 through the outside of the.

The welding torch 15 is connected by the cable 33, and the material to be welded 35 is connected by the cable 37.
It is connected to the. An inert gas such as argon is supplied from the gas cylinder 41 to the welding torch 15 via the pipe 43. The base shaft 9 of the mounting arm 7 is pivotally supported on the side opposite to the rotary actuator 3 by, for example, a bearing 45.

Next, the operation of the above embodiment will be described. When the operation switch of the welding machine 39 is pressed, the inert gas is supplied from the gas cylinder 41 to the welding torch 15 via the pipe 43, and an arc is generated between the material to be welded 35 and the welding torch 15 to start welding. .

Since the rotation center line L of the rotor 5 of the rotary actuator 3 coincides with the payout centerline of the filler wire 23 guided toward the welding point P by being guided by the guide hole 27 of the filler wire nozzle 25, Even if only the welding torch 15 is rotated at an arbitrary position and positioned, the tip of the filler wire 23 always coincides with the welding point P which is the tip position of the welding torch 15. As a result, the welding torch 15 and the tip end positions of the filler wire 23 need not be aligned at the time of welding.

The filler wire 23 is linearly paid out on the rotation center line L without turning, and only the welding torch 15 turns about the rotation center line L of the rotor 5. Since the filler wire 23 does not rotate, the pay-out supply structure of the filler wire 23 is simple, and there is no possibility that the filler wire 23 interferes with the welding torch 15 or the welding device member.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in other modes by making appropriate changes.

[0019]

As described above, according to the present invention, since the center line of rotation of the rotor of the torch turning drive source coincides with the center line of the filler wire that is fed toward the welding point, only the welding torch is used. The tip of the filler wire always coincides with the welding point, which is the tip position of the welding torch, even if is rotated at any position for positioning. This allows
It is not necessary to align the welding torch and the tip end position of the filler wire during welding.

Since the filler wire does not swirl, the structure for feeding and supplying the filler wire is simple, and there is no possibility that the filler wire interferes with the welding torch, the welding device member or the like.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a main part of a filler wire supply device of the present invention.

FIG. 2 is a TI to which the filler wire feeder of FIG. 1 is applied.
It is a front view of a G welding device.

[Explanation of symbols]

 3 Torch rotation drive source 5 Rotor 7 Mounting arm 23 Filler wire L Rotation center line P Welding point

Claims (1)

(57) [Claims] 1. A welding torch is fixed to a rotor of a torch rotation drive source via a mounting arm, and a rotation center line of the rotor is aligned with a payout centerline of a filler wire paid out toward a welding point. A filler wire supply device for a TIG welding device, which is characterized in that