A Method of Controlling the Root Gap and Warpage of Welding Joints on One Side of Thin Plate

Abstract

The invention discloses a method for controlling root gaps and buckling deformation of single-side butt-welded joints of sheets. The method includes steps of firstly, mounting a circular convex roller at the front of a welding gun according to the thickness of a sheet, groove types and the sizes, which are required by a process, of root gaps; secondly, mounting a squeezing wheel with a groove at the rear of the welding gun according to the sizes, which are required by a height strengthening process, of welded joints; thirdly, connecting the circular convex roller with the squeezing wheel by a support and mounting a squeezing force device on the support. The method has the advantages that dynamic welding dynamic positioning and constraining effects can be realized, the positioning distance is accurate, buckling deformation of the flat sheets can be flexibly controlled, an obvious flat sheet buckling deformation control effect can be realized, point fixing and removing operation on point contact, surface contact, positioning plug blocks and the like can be omitted, automatic welding procedures can be assuredly smoothly carried out, the method is free of extract constraints on the distances of the positioning plug blocks and various sections, seams can be freely expanded and contracted in the surfaces of the sheets in heating and cooling procedures, residual stress due to the extra constraints on the distances of the positioning plug blocks or various sections can be removed, and deformation due to the extra constraints on the distances of the positioning plug blocks or various sections can be prevented.

Description

technical field [0001] The invention relates to a thin plate single-face welding process method, in particular to a method for dynamically controlling the root gap and warping deformation of a single-face welded joint of a thin plate along with welding. Background technique [0002] Aluminum and titanium alloys have the advantages of high specific strength, high specific stiffness, light weight, and corrosion resistance, and are widely used in aerospace, marine weaponry and other fields. At the same time, due to its special physical and chemical properties, such as low density, small specific heat, and large thermal expansion coefficient, large internal stress will be generated in the weld seam and near seam area in flat tailor welding, of which the transverse internal stress and transverse shrinkage , will cause the root spacing of the welded plate to decrease continuously, and eventually the spacing will disappear. This will lead to uneven filling of the weld metal and le...

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to address the above-mentioned problems and deficiencies, and to provide a single-side control sheet that can solve the problems of poor flexibility in the existing thin-plate butt welding root gap and warping deformation control methods and problems that affect the quality of the weld seam and the welding process. Method of Butt Welding Joint Root Gap and Warping Deformation

[0011] A. According to the thickness of the thin plate, the form of the groove, and the size required by the root gap process, a certain distance in front of the welding torch can be installed to solve the problem that the root gap of the thin plate is getting smaller and out-of-plane due to the lateral shrinkage in front of the molten pool during the welding process. The problem of warping and deformation ensures that the welding process can be carried out smoothly. The width of the circular convex part of the circular convex roller is the same as the width of the joint root gap of the thin plate;

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