30results about How to "Effective control of welding deformation" patented technology

The invention relates to a deep U-shaped rotary section semi-closed flame tube assembly welding processing method, which belongs to the technical field of aero-engine processing. The method includes firstly using the inner wall component welding jig to assemble and weld the middle section of the flame tube inner ring, the rear section of the flame tube inner ring and the rear mounting edge of the flame tube inner ring as the inner wall component, and then heat treatment for the first time; secondly, use the front wall component welding jig to assemble and weld The front wall of the flame tube and the front part of the inner ring of the flame tube are the front wall assembly, and then the second heat treatment is performed. Use the inner wall-front wall assembly welding fixture to assemble and weld the inner wall assembly and the front wall assembly, and then perform the third heat treatment; assemble the flame again The outer ring of the tube and the outer ring of the flame tube are installed, and then the assembly is welded with the assembly welding jig, and then the fourth heat treatment is performed with the heat treatment jig; finally, the end face is turned with the turning jig. The method has the advantages of small processing difficulty, convenient operation and reliable quality.

A method for controlling welding deformation of a large-size super-thick bridge steel tower pressure plate, comprising the following steps: (1) According to the principle of the shortest length of butt welds, the pressure plate is divided into five longitudinal welds and one transverse weld It is a splicing unit of 12 pieces; (2) Design the form of the weld groove as a double-sided symmetrical U-shaped groove, so that the amount of welding on both sides is basically equal, and the tendency of welding deformation to one side is reduced; (3) Reasonable design of the assembly sequence , and use the gas shielded welding bottoming and submerged arc automatic welding filling process welding to reduce the influence of welding on deformation; (4) use pre-deformation to set a reasonable welding pre-deformation before welding to reduce the influence of welding on deformation; (5) ) Flip along the direction of the weld seam when turning over during welding to prevent elastic-plastic deformation from enlarging the welding deformation. The invention greatly reduces the welding deformation of the thick plate and reduces the follow-up correction amount. The mechanical properties of the steel are ensured to the greatest extent. The construction efficiency is improved and the construction period is shortened.

The invention discloses an extensible and retractable inner supporting tool. One end of a left-handed screw is installed in a screw installation hole in the plane geometric center of a supporting plate, and the left-handed screw is in rotating fit with the screw installation hole. A left-hand thread at the other end of the left-handed screw is installed in a threaded hole in the center at one endof a sleeve. One end of a right-handed screw is installed in a screw installation hole in the plane geometric center of the other supporting plate, and the right-handed screw is in rotating fit with the screw installation hole. A right-hand thread at the other end of the right-handed screw is loaded in a threaded hole in the center at the other end of the sleeve. The extensible and retractable inner supporting tool has extending and retracting functions; in a shortened state, the extensible and retractable inner supporting tool can be put into a shell and then extends to support a cylinder, rigid restraining to the cylinder is achieved, and the welding deformation is reduced; and by means of stress relief annealing heat treatment through the belt tool, deformation stress is eliminated, andtherefore the cylinder circular degree after welding is guaranteed, and the circular degree of the shell is reduced to 2.5 mm from 10 mm.

The invention provides a blade replacement and repair method for stator blade assemblies of gas compressors, and belongs to the technical field of component repair of aero-engines. The blade replacement and repair method comprises the steps of 1, disassembling a sealing plate; 2, removing a copper-aluminum coating at the installation part of an outer ring through a sand blowing method; 3, removing a faulted blade through an electric spark forming and machining method and eliminating oxidation films on the inner surface of a forming hole and on the ambient surface of the forming hole; 4, assembling a new blade in the forming hole, inserting the blade into the forming hole from a forming hole in one side of the outer ring, enabling the tail of the blade to be assembled into a forming hole of an inner ring, welding the blade to the inner ring and the outer ring through the spot welding method after the size meets the requirement and coating the to-be-welded head part of the newly-installed blade with brazing filler metal along the peripheries of the forming holes; 5, placing a to-be-welded assembly and a brazing clamp into a vacuum furnace for brazing; 6, after brazing is qualified, recovering the structure according to the heat treatment process of the blade, re-spraying a coating at the installation part of the outer ring according to the technology requirement after heat treatment and re-installing a sealing plate for the assemblies.

The invention discloses a manufacturing method of a fence structural component of a high-strength launching silo. The manufacturing method comprises the steps that firstly, a first anti-deformation supporting tool and a second anti-deformation supporting tool are welded along the inner wall of a barrel; then a buffer bracket is correspondingly assembled on one side of the barrel and a releasing-tensioning device mounting seat is correspondingly assembled on the other side of the barrel; channel steel tools are arranged on the outer sides of the buffer bracket and the releasing-tensioning device mounting seat; the buffer bracket and the releasing-tensioning device mounting seat and the barrel are welded; then a guide cylinder mounting seat, a bearing pedestal mounting seat plate, a buffer bracket web plate and various types of rib plates are sequentially welded and locked; subsequently, a cover-opened-in-place stop block is welded and a guide cylinder mounting panel is locked sequentially; and finally the first anti-deformation supporting tool and the second anti-deformation supporting tool are cut out and the inner circle of the barrel is subjected to overlay welding. Through the design, welding deformation of the fence structural component can be effectively controlled and the welding accessibility is ensured.

The invention relates to a driver's cab front window frame welding device and process and a driver's cab frame welding process, including a welding platform on which the front window frame is placed, and several rigid restraint devices are arranged on the welding platform. The constraint device compresses and positions the front window frame, and sets the amount of anti-deformation for each constraint position of the front window frame through the rigid constraint device. The invention adopts a modular design concept and adjusts the amount of anti-deformation at different positions of the front window frame in a targeted manner before welding, so as to effectively control welding deformation, improve welding precision, and ensure the quality of finished products after welding. Improve work efficiency and save production cost.

The invention discloses a segmented division and installation method of oversized and ultra-wide double-spliced composite I-shaped steel beams. According to the segmented division and installation method, Tekla steel structure modeling software is adopted to establish a three-dimensional visual model of a complex form; and through a BIM model and on the basis of combination of previous segmented division of the oversized and ultra-wide double-spliced composite I-shaped steel, additional arrangement of reinforcement plates is put forward creatively, and thus the problems that as for long-distance transportation of ultra-wide I-shaped steel, the segmented installation positioning difficulty is high, and the temporary reinforcement measure input is high are effectively solved. According to the segmented division and installation method, operability is high, the installation efficiency is high, welding deformation of a steel structure is effectively controlled, and the welding quality is ensured; and meanwhile, complex components between the pieces of double-spliced composite I-shaped steel are manufactured in a combined mode, the detailed installation process is determined, the construction efficiency of the steel structure is substantially improved, and economic benefits are improved.

The invention relates to a welding method for a high-energy ignition device of an aero-engine. Chemical nickel-plating is conducted on the surface of an aluminium alloy part, wetting and combining of brazing filler metal and base metal are guaranteed, and it is guaranteed that welding can be conducted effectively. Multiple kinds of welding modes are combined, so that the difficult problems that operation space is small, and welding can not be conducted are solved, the shielding performance of the high-energy ignition device is guaranteed, welding deformation of aluminium alloy thin sheets is effectively controlled, operation can be conducted in narrow space conveniently, and it is guaranteed that a high-energy ignition coil is not burnt in the welding process. The difficult problem of aluminium tin soldering and brazing is well solved, and the special requirement for electromagnetic shielding of the high-energy ignition device can be met.

The invention discloses a surface-covered mounting method for a dual-phase stainless steel water tank of a nuclear power station and a welding process, and belongs to the technical field of nuclear power station building. Wall surface covering adopts modularized manufacturing and mounting, and a reasonable wall surface-covered mounting sequence, so that mounting deformation of a surface-covered plate of the stainless steel water tank is reduced, and efficiency is improved; bottom plate surface-covering is performed after a wall surface is covered and is put in place, a bottom plate is fixed through rigidity of a pre-embedded plate, and a reasonable welding process sequence is adopted, so that effective control on bottom plate welding deformation can be realized; in a water tank mounting and welding process, an FCAW automatic or semi-automatic welding process greatly improves construction efficiency, and the construction period is shortened. The mounting method for the dual-phase stainless steel water tank of THE nuclear power station and the FCAW automatic or semi-automatic welding process are suitable for surface-covered mounting of a large dual-phase stainless steel water tank of the nuclear power station and a medium-thickness steel plate with a similar structure.

The invention discloses an automatic rotary welding device, which comprises an automatic rotary bracket, a positioning device, a sealing device and a supporting device. The supporting device is set; the upper part of the automatic rotating bracket is provided with a welding cavity, and the nozzle is fixed in the welding cavity, and the positioning device is connected with the nozzle through the welding cavity; the top of the welding cavity is connected with the sealing device, and the shell that is welded with the nozzle is placed on the sealing device The contact position of the housing and the sealing device is sealed and connected by a seal; one end of the supporting device is connected to the lower part of the automatic rotating bracket, and the center of the bottom of the housing is located at the other end of the supporting device. The invention realizes the sealing of the welding cavity, ensures the filling of protective gas and the discharge of redundant air during the welding process, improves the quality of the weld seam, can effectively control the welding deformation, has simple operation, accurate welding positioning and high efficiency.