38results about How to "Small welding heat affected zone" patented technology

The invention discloses a laser wire filling and butt welding method for a titanium-steel composite plate with T2 red copper serving as a transition layer. The method comprises the following steps: (1) machining two titanium-steel composite plates to be subjected to butt welding; (2) butting and assembling the two titanium-steel composite plates to be subjected to butt welding; (3) performing laser backing welding on a gap between titanium plates of the two titanium-steel composite plates to be subjected to butt welding to form a laser backing welding line; (4) covering the lower surface of the laser backing welding line with titanium welding wires by adopting laser wire filling welding to form a titanium wire welding line, and overlaying a layer of T2 red copper at the bottom of a V-shaped groove to form a transition layer welding line; (5) overlaying a first layer of steel welding bead on the upper surface of the transition layer welding line; and (6) overlaying a second layer of steel welding bead on the upper surface of the first layer of steel welding bead by adopting the laser wire filling method. According to the method, the problems of high welding heat stress and serious mismatch of heat stress between metal layers due to the formation of brittle intermetallic compounds in the butt welding process of the titanium-steel composite plate can be effectively solved.

The invention relates to the technical field of welding, in particular to a 3-5 mm stainless steel plate single-side welding double-sided free forming welding method. The method comprises the following steps of firstly, carrying out milling, cleaning and other pretreatment on a workpiece to be welded; then carrying out manual spot welding for positioning and fixing; then fixing the workpiece to bewelded to a welding workbench through a pressing plate; and finally completing welding by adopting a CMT mix (CMT + PMC) welding process. According to the method, the manual mode is prepared before welding, the operation is simple, the labor intensity is low, the welding joint welding adopts robot welding, the automation degree is high, the welding efficiency is greatly improved, the welding deformation is smaller, the single-side welding double-sided free forming of welding line is guaranteed, the hot input of the weld joint can be accurately controlled, the welding heat affected zone is reduced, the welding spattering is small, and the quality of the weld joint is greatly improved.

The invention relates to a welding method of a metal layer shaped composite board. The elding method of the metal layer shaped composite board is characterized by the following steps of 1, welded joint design, 2, wielding method design, 3, V-shaped strips preparation and filler wire selection and 4, welding sequence design. The wielding method design includes that the laser is utilized to weld I shaped grooves, middle truncated edge and weld grooves matching with the V-shaped strips; when the V shaped groove only has one layer of materials, the laser arc composite heat source is utilized to weld the weld grooves. The wielding method design includes welding the I shaped grooves and the middle truncated edge first and then the V-shaped grooves. Compared with the prior art, the welding method of the metal layer shaped composite board has the advantages that the welding method of the metal layer shaped composite board is high in welding quality, few in welding defects, is easy to operate and can increase welding efficiency.

The vacuum electron beam welding process for square axle journal and square axle pipe of support axle includes the following steps: fixing the axle journal and axle pipe with fixtures, heating the welding seam part with medium frequency heating coil at 200-250 deg.c for 20-25 sec, and welding with automatically focusing electron beam. The vacuum electron beam welding process of the present invention has greatly reduced welding deformation, high welding precision, high welding performance, less welding wire and welding flux consumption and less environmental pollution.