JPH08174222A - Wire feeding system of straight torch for welding - Google Patents

Abstract

PURPOSE: To secure a stable electric conduction and the accurate aiming of a wire feeding to a welding part by arranging a wire correcting device for forming a fixed curve and a flexible conduit winding one turn along the fixed curve formed to the wire. CONSTITUTION: The flexible conduit 8 winds the wire at one turn on almost the same plane with the X-X axis for holding the curve formed to the wire to the constant with the wire correcting device 2 to connect a wire feeding device 1 with a straight torch 3 for welding. The supplied wire 9 is passed through the interval among a shifting adjustable correcting roller 10 and fixed correcting rollers 11 and fed to the wire feeding device 1. The curve of the wire 9 can be adjusted by interposing with the shifting adjustable correcting roller 10 and the fixed correcting roller 11 at the center, and further shifting the correcting roller 10 downward for the small curve and upward for the large curve by operating a knob 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire feeding system path when a straight torch for welding is used.

[0002]

2. Description of the Related Art Generally, the wire of a welding torch is straightened as much as possible in order to reduce the load at the time of feeding, and is fed to the welding torch by a wire feeding device. When the wire straightened by the wire straightening device is forcibly bent in a welding torch with a curved part, that is, a curved torch in front of the tip mounting part of the torch, it tries to return straight and always moves in one direction. Since the repulsive force is generated, the contact with the tip becomes constant, so that it is possible to achieve a good electric current and a stable wire feeding aim for welding.

On the other hand, when a straight torch is used for the convenience of equipment or the object to be welded, the wire feeding system path similar to that described above does not have a curved wire path such as a curved torch for welding. The wire plays due to the clearance, and the aim of supplying electricity to the welded part of the wire becomes unstable. Therefore, a wire passage having a curve for stabilizing the energization and the wire feeding aim is provided in the wire feeding system passage so that the same effect as the curved torch can be obtained. The wire feeding system path of the conventional welding straight torch will be described below.

FIG. 4 shows a contact state between a wire and a tip during wire feeding in a curved torch, and FIG. 5 shows an upper surface of a wire feeding system passage of a conventional welding straight torch.

In FIG. 4, the wire 41 straightened by the wire straightening device is elastically deformed along the curve and fed to the tip 43 by passing through the wire passage of the curved torch 42 in front of the tip. . Therefore, a repulsive force that causes the wire to return straight is generated, and the tip tip 44 always contacts.

Reference numeral 51 in FIG. 5 is a welding straight torch. A tip 52 is attached to the welding straight torch 51 and energizes the wire. Reference numeral 53 is a curved guide tube for giving a certain curve to the wire, and 54 is a flexible conduit serving as a wire feeding passage. 55 is a wire feeder having a drive motor for feeding the wire, and 56 is a wire straightening device for straightening the wire. In the wire feeding system path of the welding straight torch configured as described above, the welding straight torch 51 and the flexible conduit 54 are provided.
A curved guide tube 53 is provided between the two, and since the curved guide tube 53 is forcibly bent here, a repulsive force is always generated in the same direction as in the curved torch.

[0007]

However, since the position of the curved guide tube 53 for forcibly bending the wire is far from the tip 52 which conducts electricity,
The repulsive force generated when the wire straightened by the wire straightening device 56 passes through the curved guide tube 53 becomes small, and it becomes impossible for the tip 52 to obtain a sufficient contact force for energization. There was a problem that became unstable.

In view of this problem, it is an object of the present invention to provide a wire feeding system path which is capable of stable energization and wire feeding when a straight torch for welding is used.

[0009]

In order to achieve this object, the wire feed system path of the welding straight torch of the present invention includes a wire straightening device for plastically deforming the wire to form a constant curve, and a wire straightening device for welding. The wire feed device for feeding the wire to the straight torch and the flexible conduit which is wound one turn along a certain curve attached to the wire by the wire straightening device.

[0010]

In the wire feeding system thus constructed, the wire is first subjected to a constant curve by plastic deformation by the wire straightening device. A wire having a constant curve is fed to a flexible conduit by a wire feeding device. In order to maintain the shape of a wire with a certain curve due to plastic deformation in the wire straightening device, the flexible conduit is wound one turn on the substantially same plane along the curve of the wire, and the wire feeding device and the welding straight Connected to the torch.

Therefore, since the wire having a constant curve passes through the flexible conduit wound by one turn, it is sent to the straight torch for welding while keeping the constant curve without being stretched straight again. Therefore, the tip at the tip enables good electricity supply and stable feeding of the wire to the welded portion.

As described above, the wire straightening device forcibly applying a constant curve to the wire and the flexible conduit having one turn on the same plane along the constant curve make it possible to obtain a good current and a stable current flow. It becomes a wire feeding system path that can be aimed at wire feeding.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1, 2 and 3 show an embodiment of the present invention. FIG. 1 shows a wire feed system path of a straight torch for welding, FIG. 2 shows a configuration of a wire straightening device, and FIG. 3 shows a contact state between a wire and a tip during wire feed. Figure 1
2 and 3, the wire feeding device 1 sends a wire having a constant curve by the wire straightening device 2 to the welding straight torch 3. A feed roller 5 for feeding the wire is attached to an output shaft of a motor 4 which is a drive source for feeding the wire, and the wire is sandwiched between the feed roller 5 and the pressure roller 6 and applied to the pressure roller 6. The pressure is applied by the pressure lever 7, the motor is driven, and the feed roller 5 is rotated to feed the wire.

The flexible conduit 8 is wound one turn on substantially the same plane as the XX axis in order to keep the curve attached to the wire by the wire straightening device 2 constant, and the wire feeding device 1 and the welding straight torch 3 are wound. It is connected to the. The wire 9 supplied in FIG. 2 passes between a straightening roller 10 whose movement is adjustable up and down in FIG. 2 and a fixed straightening roller 11, and is fed to the wire feeding device 1 in FIG. The curve of the wire is sandwiched between the straightening roller 10 whose movement can be adjusted and the straightening roller 11 which is fixed in the middle. The bending can be adjusted.

The straightening rollers 10 and 11 can rotate about the straightening roller shaft in order to reduce a large load when straightening the wire.

The flexible conduit 8 protects the winding diameter and the arrangement on the XX axis in FIG.
It is fixed with a cable hanger.

As a result, as shown in FIG. 3, even in the welding straight torch 3, when the wire 9 having a certain curve due to plastic deformation passes through the wire passage in the welding straight torch 3, the wire 9 is curved. Therefore, the tip of the tip 13 can always be contacted.

Therefore, the stable energization and the aim of feeding the wire to the welded portion are secured as in the case of the curved torch, so that it is possible to improve the operation rate of the automatic welding machine and stabilize the welding quality.

[0020]

As described above, according to the present invention, a wire straightening device that plastically deforms a wire to form a constant curve, and a flexible conduit that is wound one turn along a constant curve attached to the wire by the wire straightening device. By providing the above, it is possible to realize an excellent wire feed system path for a straight torch for welding, which can secure stable energization and the aim of feeding the wire to the welded portion.

[Brief description of drawings]

FIG. 1 shows a wire feeding system path of a straight torch for welding in an embodiment of the present invention (a) is a top view thereof and (b) is a side view thereof.

FIG. 2 is a side view of the main part of the wire straightening device.

FIG. 3 is a partial sectional view showing a contact state between a tip and a wire in the same welding straight torch.

FIG. 4 is a partial cross-sectional view showing a contact state between a tip and a wire in a conventional curved torch for welding.

FIG. 5 is a top view of a wire feeding system path of the straight torch for welding.

[Explanation of symbols]

 1,55 Wire feeding device 2,56 Wire straightening device 3,51 Welding straight torch 4 Motor 5 Feed roller 6 Pressure roller 7 Pressure lever 8,54 Flexible conduit 9,41 Wire 10 Movement straightening roller 11 Fixed straightening roller 12 Knob 13,52 Tip 53 Curved guide tube

Claims (1)

[Claims] 1. A wire straightening device for forcibly giving a constant curve to a wire, a wire feeding device for feeding the wire to a straight torch for welding, and one turn on substantially the same plane along the curve of the wire. A straight torch welding wire feeding system equipped with a flexible conduit that serves as a wound wire feeding path.