WELDING DEFORMATION CONTROL METHOD FOR JOINT BETWEEN LARGE INSERTED OBLIQUE TUBE AND CYLINDER

摘要

A welding deformation control method for a joint between a large inserted oblique tube and a cylinder comprises: Step 1: opening a hole on a side portion of a cylinder (22); Step 2: assembling a large inserted oblique tube (21) and the cylinder (22), and welding a fixing ribbed plate (23) on an outer side of a joint; Step 3: measuring the dimensions of the joint between the cylinder (22) and the large oblique tube (21), and leaving an anti-deformation margin of an angle α; Step 4: welding to form a welded seam on the lower part; Step 5: welding to form a welded seam on the middle and lower parts, and measuring an included angle β through a total station electronic tacheometer (26), the included angle β being controlled to be 180° in the welding process; Step 6: welding to form a welded seam on the middle and upper parts, and measuring the included angle β, the included angle β being controlled to be 180° in the welding process; Step 7: welding to form a welded seam on the upper part. The method uses the total station electronic tacheometer (26) and, in combination with the rigid fixing method, controls welding deformation of the joint in the process of welding the large inserted oblique tube (21) and the cylinder (22), so that the product pass rate is high, and the welding quality is effectively guaranteed. The method is simple and is highly effective in controlling welding deformation of large insertion joints.