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 invention discloses a method for machining stainless steel capillary cores on a heat pipe plate. The method includes the following steps that firstly, a red copper template is provided and provided with through holes; secondly, the template, a stainless steel screen and the plate are sequentially stacked, the portions, corresponding to the through holes, of the stainless steel screen are exposed outside, and the template, the stainless steel screen and the plate are fixed together, so that a workpiece to be welded is obtained; and thirdly, the workpiece to be welded is welded through electron beams and the portions, corresponding to the through holes, of the stainless steel screen are welded to the heat pipe plate. By the adoption of the method, an electron beam welding process is adopted for machining the stainless steel capillary cores and the welding heat influence region is small; and the stainless steel screen and the heat pipe plate are combined tightly and the capillary effect is good.

The invention discloses a flash butt welding machine for vehicle door corner welding, which comprises a base, clamping devices, an upsetting mechanism and an electric controller, wherein the clamping devices comprise a first clamping device for clamping a right welding piece and a second clamping device for clamping a left welding piece. The flash butt welding machine is characterized by also comprising a clamp adjusting device and an adjusting bottom plate capable of moving freely in a space, wherein the second clamping device is fixedly arranged on the adjusting bottom plate; an upsetting device comprises a guide rail seat, a moving component slipping along the guide rail seat and a servo driving device for driving the moving component to move; the first clamping device is fixedly arranged on the moving component; and a first insulating plate is arranged between the bottom of the clamp adjusting device and the base, and a second insulating plate is arranged between the bottom of the guide rail seat and the base. Compared with the prior art, the flash butt welding machine can randomly adjust the space placing position of the welding piece to ensure the welding quality and the appearance and profile requirements of a welded product; and the clamp adjusting device is convenient and simple in operation, and improves the 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.

The invention relates to a rocket engine jet pipe brazing strip automatic rolling point welding machine and a rolling point welding process. The automatic rolling point welding machine comprises a body base, a rotating workbench, a tensioning pattern, a gate type support, a brazing strip disc, a controller, an angle adjusting mechanism, a longitudinal rolling point welding operating mechanical arm, an annular rolling point welding operating mechanical arm and the like. By the automatic rolling point welding machine, mechanical, automatic and intelligent longitudinal brazing strip and annular brazing strip rolling point welding are achieved on jet pipe components, welding efficiency is high, welding quality is good, welding point distances are adjustable, rolling point welding speed can be reach 3 points / second, and welding speed can reach more than 5 meters / second. The automatic rolling point welding machine has no noise, arc, splash, radiation and the like during welding, and is high in reliability, simple to operate, easy to maintain, and suitable for welding of rocket engine spraying pipes with the diameters of 260-1500mm.