JPS6235578Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a welding wire orientation adjustment device that adjusts the bending tendency of a welding wire that is bent in a doglegged zigzag shape just before bending.

A narrow welding method uses a small-diameter welding wire as a consumable electrode, and feeds the welding wire while bending it in a dogleg-shaped zigzag shape under a gas shield, and welds by directing the arc evenly to both opposing groove walls. In the groove welding method, in order to create even and sufficient penetration on both groove surfaces and perform complete welding, as shown in FIG. is always in the direction of the groove width center line, and its position must be at the center of the groove width. However, as shown in Figure 2, due to improper adjustment of the wire's bend, the wire is often deflected to the groove wall in one direction, and in this case, uniform penetration cannot be achieved, resulting in poor fusion and The occurrence of welding defects due to unevenness of the deposited metal is unavoidable.

The present invention aims to solve the above-mentioned problems by making it easier to adjust the wire orientation to the groove wall surface before welding, and also to easily correct the orientation during welding to prevent welding defects and improve quality. In a welding device that bends the welding wire in a dogleg-shaped zigzag shape and directs it toward the opposite groove wall surface, the wire bending feed consists of a pair of shaping feed gears that push the welding wire and rotate it relative to each other to plastically deform it in a wave-like manner. A welding wire orientation adjustment device is provided, characterized in that it is provided with a moving means for sliding a wire guide cap located immediately in front of the means in a direction perpendicular to a wire feeding direction.

An embodiment in which the present invention is applied to a gas shield consumable electrode welding device will be described with reference to FIG.

A welding wire 1 attached above the welding device and wound into a coil is straightened to a state close to a straight line to some extent by passing through a wire straightener 2, and is integrally formed in a linear position from the straightener 2. The wire passes through the wire guide cap 3, is formed by being pressed by the bending forming feed gears 4 and 4', and is fed downward at a feed speed corresponding to the welding current value by transmission of the rotation of a feed motor (not shown). Passing through the wire guide tube 6, the power supply chip 7 at the tip
sent out.

The bending forming feed gears 4 and 4' are attached to a slide 9 attached to a base plate 8, and are opposed to each other by a slide shaft machined with a right-hand thread and a left-hand thread. be adjusted.

The straightener 2 and wire guide cap 3 located above the forming feed gears 4 and 4' are attached to a slide 11 fixed to a base plate 8, and can be slid horizontally by a handle 12 to change their position. Ru.

The bent wire 13 is extruded from the tip 7 parallel to the groove walls 14, 14' so that it does not approach either of the groove walls 14, 14'. It has been corrected to a state close to that of However, as shown in FIG. 4a, if the molded material passes through the guide tube 6 and exits the chip 7 with a slight curvature remaining, it may be directed toward one of the groove wall surfaces. Further, even if sufficient adjustment is made before welding, the orientation of the wire 13 may change during long-term welding. In order to return the orientation of the wire 13 to the state parallel to the groove walls 14, 14' from the state shown in FIG. 4a, move the wire guide cap 3 to the rightward position as shown in FIG. 4b. By slightly changing the angle, it is possible to create a curve to the right using the gear meshing point as a fulcrum.

In this way, by moving the position of the wire guide cap 3 located immediately in front of the shaping feed gears 4, 4' in the left-right direction by the slide 11, unexpected bending of the wire 13 toward the groove wall surfaces 14, 14' can be prevented. Correction can be made at any time even during welding.

As described above, in the device of the present invention, by providing a moving means for sliding the wire guide cap to the left and right, it is possible to accurately adjust the wire orientation in the case where the bending is insufficiently corrected. Moreover, directivity correction during welding can be easily performed, and welding defects due to uneven penetration, poor fusion, etc. can be prevented, and the quality of welding can be improved.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the wire feeding state in conventional narrow gap welding, Figure 3 is a schematic diagram of an embodiment of the device of the present invention, and Figure 4 is a diagram of wire feeding in the device of the embodiment of the present invention. It is an explanatory diagram of a supply state. 1: Wire, 3: Wire guide cap, 4, 4':
Wire bending molded feed gear, 6: wire guide tube,
7: Power supply chip, 11: Slide, 12: Handle, 13: Bent wire, 14, 14'
...grooved wall.

Claims (1)

[Scope of utility model registration request] In a welding device that bends the welding wire in a dogleg-shaped zigzag shape and directs it toward the opposite groove wall surface, the wire consists of a pair of forming feed gears that press the welding wire and rotate it relative to each other to plastically deform it in a wave-like manner. 1. A welding wire orientation adjustment device comprising a moving means for sliding a wire guide cap located immediately in front of a bending feeding means in a direction perpendicular to a wire feeding direction.