JPS6232694Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a wire feeding device for arc welding, especially a wire feeding device that feeds multiple welding wires with one drive motor in order to increase the welding speed of welding wire. This relates to a feeding device.

Fig. 1 is a front view showing a conventional wire feeding device;
FIG. 2 is a sectional view of the drive roller section, and in the figure, 1 is a drive motor, 2 is a drive roller having two wire guide grooves connected to the output shaft of this drive motor, and 3 is this drive roller. 4 is a swing arm to which this pressure roller is attached; 5 is a correction roller provided at the tip of this swing arm; 6 is a lever for operating the swing arm 4; 7a; , 7b is a welding wire that is pressed by the pressure roller 2 in the groove of the drive roller 2, 8 is a bracket to which the swing arm 4 is attached, and 9 is a key for fixing the drive roller 2 to the output shaft of the drive motor 1. It is.

The conventional wire feeding device is configured as described above, and when the lever 6 is operated to push down the swing arm 4, the pressure roller 3 is pressed against the drive roller 2, thereby welding wires 7a, 7b
is pressed between the drive roller and the pressure roller 3 and pushed out by friction, and the curvature is corrected by the correction roller 5 before being fed.

In the conventional wire feeding device, a plurality of welding wires are pressed by one pressure roller, so if one of the two grooves of the drive roller 2 is worn out by the welding wires 7a and 7b, As shown in FIG. 2, since only one side of the welding wire 7a is pressed against the groove of the drive roller 2 by the pressure roller 3, a gap .alpha. occurs, causing the welding wire 7b to slip. Therefore, the feeding amounts of the two welding wires 7a and 7b are different, which has a disadvantage that it adversely affects the welding result.

To avoid this, a conventional method (not shown) has been used in which two commonly used wire feeding devices are used to feed two welding wires. Two control devices are required to control the drive motors, and it is necessary to synchronize the two drive motors, which is expensive.

This idea was made in order to eliminate the drawbacks of the conventional ones as described above, and by providing a single drive motor with multiple wire drive mechanisms and straightening mechanisms, multiple welding wires can be fed at the same speed. The purpose of the present invention is to provide a wire feeding device that feeds wires with

This invention is a wire feeding device for arc welding in which a plurality of welding wires are fed by a single drive motor. This is a wire feeding device characterized by comprising a plurality of pressure rollers that sandwich and press a welding wire.

An embodiment of this invention will be described below with reference to the drawings. Figure 3 is a front view of one embodiment of this invention;
The figure is a left side view. In FIGS. 3 and 4, 1 is the same as that of the conventional device described above,
2a to 8a and 2b to 8b are 2 to 8b of the conventional device.
8, and each constitutes an independent wire drive mechanism and correction mechanism. That is, 2a, 2
b is a drive roller separately connected to the output shaft of the electric motor 1, 3a and 3b are pressure rollers provided oppositely above these drive rollers, and 4a and 4b are swings to which these pressure rollers are attached. Arm, 5
a, 5b are correction rollers provided at the tips of these swing arms; 6a, 6b are levers for operating the swing arms 4a, 4b; 7a, 7b are welding wires passing through the grooves of the drive rollers 2a, 2b;
8a and 8b are brackets to which swing arms 4a and 4b are attached. Further, 10 is a driven shaft connecting the output shaft of the drive motor 1 and the drive roller 2b;
1 is a joint provided at the tip of this driven shaft, 12
13 is a pin provided on the output shaft of the drive motor 1 so as to be inserted into this groove, 14 is a bearing that slidably supports the driven shaft 10, and 15 is a shaped groove provided in this joint portion. The shape groove 12 is the pin 13
This is a spring that presses the joint part 11 so that it does not separate from the joint part 11.

In the wire feeding device configured as described above, when the lever 6a is operated to push down the swing arm 4a and press the pressure roller 3a against the drive roller 2a, the drive roller 2a is keyed to the end of the output shaft of the drive motor 1. 9 and rotating, the wire 7a is pressed by the pressure roller and fed by friction. On the other hand, a pin 1 with a slightly smaller diameter than the key 9 is attached to the output shaft end of the drive motor 1.
3 is provided and inserted into the groove 12 of the joint portion 11 provided at the shaft end of the driven shaft 10, the rotational force of the drive motor 1 is transmitted to the driven shaft 10, and the drive roller 2b is also rotated. . Therefore, by operating the lever 6b to push down the swing arm 4b and pressurizing the pressure roller 3b, the wire 7b is also fed in the same manner.

Since the pressure rollers 3a and 3b are operated independently by the levers 6a and 6b in this manner, no slipping occurs even if the grooves of the drive rollers become worn. The driven shaft 10 is supported by a bearing 14, and not only rotates the drive roller 2b by the drive motor 1, but also moves within the bearing 14 in the thrust direction when the drive roller 2a wears out and is replaced.
After replacement, the engagement portion between the pin 13 and the groove 12 is always pressed in the direction of the drive motor 1 by the spring 15 so that it does not come off. Also bearing 14
holds a wire drive mechanism and a wire straightening mechanism, which are comprised of a swing arm 4b, a straightening roller 5b, a pressure roller 3b, and the like.

As described above, this invention provides a wire feeding device for arc welding in which a plurality of welding wires are fed by a single drive motor. A plurality of pressure rollers that apply pressure by sandwiching a welding wire between them and a drive roller, a plurality of swing arms to which these pressure rollers are attached separately, and a It is equipped with a plurality of correction rollers that correct the welding wire and a plurality of levers that operate each swing arm separately, and a pin is provided at the output shaft end of the drive motor,
This pin is inserted into a groove in a joint provided at the shaft end of the driven shaft and pressed by a spring, and the rotational force of the drive motor is transmitted to the drive roller via the driven shaft, and the drive roller can be attached to and removed from the driven shaft. Since it is configured to be freely attached, the feeding speed of a plurality of welding wires can be made exactly the same, and the drive roller can be easily replaced.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional wire feeding device, Figure 2 is a front view of a conventional wire feeding device;
3 is a front view of a wire feeding device according to an embodiment of the present invention, and FIG. 4 is a left side view of FIG. 3. 1... Drive motor, 2, 2a, 2b... Drive roller, 3, 3a, 3b... Pressure roller, 4, 4
a, 4b...swing arm, 5, 5a, 5b...
...Correcting roller, 6, 6a, 6b...Lever, 7
a, 7b... Welding wire, 8, 8a, 8b... Bracket, 9... Key, 10... Driven shaft, 11...
...Joint part, 12...Shape groove, 13...Pin, 14
...Bearing, 15...Spring. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a wire feeding device for arc welding in which a plurality of welding wires are fed by one drive motor, there are a plurality of drive rollers 2a, 2b connected to the output shaft of a drive motor 1, and these drive rollers. A plurality of pressure rollers 3a, 3b that press welding wires 7a, 7b between them, and a plurality of swing arms 4a to which these pressure rollers are separately attached.
4b, a plurality of straightening rollers 5a and 5b that are separately provided at the tips of these swing arms and that straighten the welding wire, and a plurality of levers 6a and 6b that operate each swing arm separately, and a drive motor 1. A pin 13 is provided at the output shaft end of the driven shaft 10, and this pin is inserted into a groove 12 of a joint portion 11 that is provided at the shaft end of the driven shaft 10 and is pressed by a spring 15. 10 to a drive roller 2b, and the drive roller 2b is detachably attached to a driven shaft 10.