O shaped gas shield resistance butt welding device and method

Abstract

The invention discloses an O-shaped ring gas protection contact butt-welding device and a method thereof. In the method, a workpiece is heated to a plastic deformation stage by the heating of a resistance; the joint position of the workpiece is fused and deformed by upset pressurizing. A welding clamp provides possibility for mounting the workpiece with no misalignment by rotating a left adjusting bolt (7) and a micrometer head (10). A steel wire (17) is adopted to be connected with a pull pin (16) of a handle for hanging a weight (20) by rounding a crown block (18); the gravity is used as the applying mode for upset pressure. A control method by using a laser sensor (13) for feeding back the length of the workpiece extending out of an electrode (12) as the welding squeezing amount is used. The technique is suitable for the welding of a hollow O-shaped ring of stainless steel, a solid O-shaped ring, a hollow O-shaped ring of aluminum alloy and a solid O-shaped ring, the tubular diameters of which are between 2 and 5mm. The welding quality is better than arc welding and the technique is stable, thus greatly improving the qualified rate of the product.

Description

technical field [0001] The invention relates to an O-ring gas shielded contact butt welding device and method. The device can be used for welding small-diameter thin-wall stainless steel hollow rings, solid rings, aluminum alloy hollow rings, solid rings, etc., and belongs to the field of welding technology. Background technique [0002] For thin-walled and small-diameter (φ3×0.5mm) stainless steel welding methods, arc welding is generally used at home and abroad, and micro-beam plasma arc welding is the most typical. The main disadvantage of arc welding is that it is difficult to control the constant heat throughout the melting process. The technological parameters of the welding process should be kept constant, mainly reflected in the constant current, the constant length of the arc and the uniformity of the welding speed. If micro-beam plasma arc welding with highly concentrated energy is used, defects such as incomplete fusion and incomplete penetration will also be cau...

AI Technical Summary

Problems solved by technology

If micro-beam plasma arc welding with highly concentrated energy is used, small lateral swings will also cause defects such as incomplete fusion and incomplete penetration

And it is easy to produce double arc phenomenon in the welding process, which leads to welding interruption

In the welding effect, it is easy to have insufficient strength or the through hole is blocked after welding

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