2results about How to "Control welding deformation" patented technology

This invention discloses a three-dimensional assembly method for ultra-large span double-layer steel truss bridges, including: setting two rows of steel piers according to the camber of the jig and preventing settlement; using a gantry crane with special clamps to achieve the horizontal and vertical conversion of the truss segments; assembling the first segment in the order of lower bridge deck, side trusses, and upper bridge deck; subsequently, matching and welding the mother segments in the same order; pre-setting vertical anti-deformation during assembly, and welding from the middle section to both sides; uniformly installing anchor pipes after the completion of the large segment assembly in a single round; setting three quality control points during assembly to check the total length, side curvature, truss width, diagonal difference, camber, and anchor point spacing; after passing the test, disassembling and removing the jig, retaining the mother segment for the next round. This application controls welding deformation and cumulative alignment error through multi-segment continuous matching assembly and anti-deformation pre-setting; the subsequent installation of anchor pipes avoids collisions and ensures anchor point accuracy; setting the jig according to the camber and re-measuring in rounds achieves a reliable transition from stress-free to stress-loaded installation.

The application relates to a welding control tool in the technical field of welding. The welding control tool comprises a welding platform, a first control area and a second control area are arranged on the welding platform, a welding station for placing a cross beam body is arranged between the first control area and the second control area; a backing plate is installed on the welding platform and located at the middle part of the welding station; a pressing device is installed on the welding platform and located at the first control area and the second control area respectively, and the pressing device is used for pressing the cross beam body at both ends of the welding station. The application solves the problem of large deformation of the cross beam body after welding, improves the production efficiency and product quality of the cross beam body, and saves the labor cost of correction.