3results 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 invention relates to the technical field of precision structural part welding, in particular to a new energy automobile die-casting aluminum alloy precision structural part welding device which comprises a laser welding head, and the welding device comprises a bearing platform arranged on the side wall of the laser welding head; according to the welding device, the welding position pre-cleaning, welding head protection and welding line cooling integrated welding device is designed, the multifunctional nozzle rotates to the front portion of the laser welding head before welding to convey high-pressure clean airflow, the welding head is arranged in the welding position, the welding head is arranged in the welding position, and the protective gas nozzles are arranged on the side wall of the laser welding head at equal intervals and used for conveying argon to the welding position. After welding, the multifunctional nozzle rotates to the rear portion of the laser welding head to convey low-temperature cooling gas, the gas curtain gas nozzle conveys inert gas during cleaning, a physical barrier is formed between the multifunctional nozzle and the laser welding head, pollutants are prevented from reversely splashing to a laser head lens, and the multiple protective gas nozzles stably convey argon to a molten pool in the whole welding process. And a continuous gas protection layer is formed.

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.