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

The invention discloses a stainless steel tube with welding bevel model. One end of the stainless steel tube is provided with an arc bevel. The arc bevels of the adjacent stainless steel tubes are jointed together to form a U shaped bevel. Meanwhile, the invention also discloses a welding method of the stainless steel tube and an argon shield apparatus used in the welding method. The invention has good weld joint molding effect and uniform weld joint reinforcement. The invention is mainly applied to the austenitic stainless steel welding in the fields of petroleum, chemical industry, metallurgy, machinery and naval construction.

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 theguide 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 invention discloses a fuse wire filled multifunctional controllable additive manufacturing device. The fuse wire filled multifunctional controllable additive manufacturing device is composed of an electric control system, a vacuum chamber, an electronic gun, a high voltage power supply, a motion system, a wire feeding system and a particle feeding device. According to the device provided by the invention, metal particle included slag filling, particle included slag and wire rod mixed filling, single wire rod filling, multiple wire rod same material filling and multiple wire rod different material filling can be realized. By adjusting the wire feeding speed, the wire feeding mode and the filling amount of metal particles of each of wire feeding units, the filling material and the filling amount of a weld joint are changed; in an additive manufacturing process, the metal particles can be synchronously fed by virtue of the wire feeding system and the wire feeding system feeds the wires synchronously to realize metal particle included slag filling, and multiple wire rod same material same speed and multiple wire rod different material different speed addition, so that the components of the filling material of the weld joint are differently distributed, thereby realizing continuous processing of a functional gradient material.

The invention relates to a high-frequency induction brazing method for the connection of a deep cavity inner conductor of a coaxial transmission line. The coaxial transmission line consists of an inner conductor and a hollow outer conductor. The inner conductor is connected with two conductors to form a T shape or an L shape and the brazing method comprises the following steps: the connection ends of the two conductors are respectively provided with a threaded hole and a screw rod; a tool withdrawal groove at the joint of the threaded hole and the screw rod is provided with welding wires or coated with solder pastes; and the two conductors are screwed to lead an induction coil to be sleeved at the end joints of the deep cavity inner conductor or the joints between a supplementary conductor and the inner conductor. The welding conditions are as follows: the power, power rate and heating and electrifying time of a high frequency generator are respectively 5KW, 30-60 percent and 6-80 seconds. In the induction heating brazing, the local temperature of the weld joint of a workpiece can meet the requirement of the brazing temperature rapidly and solders are spread evenly. Compared with the integrative heating method, the heat absorbed by the workpiece has small heat input and centralized heat. The high-frequency induction brazing method utilizes the internal thermal conductance of the workpiece to cool water or assist water cooling, thereby rapidly realizing the brazing connection of the connection ends and high quality of weld seams.

The invention discloses a control system and method for weld-forming of a thin-walled pipe. The control system comprises a welding tool used for weld-forming of the thin-walled pipe and a quality control device used for controlling the quality of longitudinal joints, welded by the welding tool, of the thin-walled pipe. The method comprises the following steps of 1, assembling the welding tool and the to-be-welded thin-walled pipe; 2, debugging the welding tool; 3, initializing the quality control device; 4, starting welding the to-be-welded thin-walled pipe; 5, acquiring real-time welding data of the thin-walled pipe; 6, judging whether the real-time welding data of the thin-walled pipe are abnormal or not; 7, judging whether the thin-walled pipe is defective or not; 8, judging whether the thin-walled pipe is deformed or not; and 9, carrying out stress relaxation on the thin-walled pipe. According to the control system and method for weld-forming the thin-walled pipe, the welding tool provides stable protective gas flow and double cooling measures for the to-be-welded thin-walled pipe, the welding quality of the to-be-welded thin-walled pipe is monitored in real time through the quality control device, so that the residual stress is eliminated, the fatigue life is prolonged, and the stress corrosion resistance is improved.

The repairing welding for aluminum alloy defects starts with deciding defect location, trimming before the welding, degreasing for the repairing area, micro zone weld repairing using pulse energy, inspecting the working piece to make sure the repairing quality, till the nonexistence of leakage of the part. It also relates to the pulse energy micro bonding machine. Without affecting the dimension of the base metal, it can repair the defect, meeting the sealing requirement.

The invention provides a laser welding device and method for a melting ball on a filament end face, wherein the device comprises a laser used for producing a laser beam, a circular truncated cone, a clamping piece used for clamping and fixing a filament, and a plurality of fixing blocks, wherein the clamping piece is vertically fixed in the center of the circular truncated cone, the plurality of fixing blocks are evenly distributed around the axis of the filament, are fixed on the circular truncated cone, and are abutted against the clamping piece, and the laser beam and the filament are coaxially arranged. The laser welding device and method guarantee that the melting ball is not eccentric when welded at the end part of a wire, the welding heat affected zone is small, no oxidation occurs after the welding, and the welding effect of the filament end face is effectively improved.

The invention provides welding tool equipment. The welding tool equipment comprises a base assembly, an upper electrode assembly and a lower electrode assembly. The base assembly is fixed. The upper electrode assembly comprises an upper electrode head. When the upper electrode head moves to the stroke end point in the direction of the base assembly, a welding space is formed between the bottom face of the upper electrode head and the base assembly. The lower electrode assembly comprises two or more lower electrodes. When the two or more lower electrodes move to the stroke end point towards thewelding space, the welding space is surrounded by the two or more lower electrodes, and the two or more lower electrodes are combined to form a lower electrode head. The welding pressure of the welding tool equipment is provided by the upper electrode head and the base assembly, the position of the lower electrode head can be freely arranged, and good practicality is achieved.

The invention relates to a blank blade correction method. A cast blank blade is photographed, pictures are transmitted to a computer, the size of the blank blade is fit through a measuring scale and a three-dimensional number model, the blank blade is compared with a standard blade numerical model, and the deformation region and the deformation amount of the blank blade are determined; the blade is fixed to a steel plate platform and heated through a stacking heating wall and a heating burner, the blade is corrected multiple times through a jack via external force, and therefore the blank blade correction purpose is achieved; finally, the blade is delivered into a heat treatment furnace for relieving stress and shaping. By the adoption of the method, the correction process is simple, production cost is saved, a production period is shortened, a welding heat influence region is reduced, and product quality is improved.

The invention relates to a K1-type electrical connector assembly of a mineral insulated cable for nuclear power, and the assembly comprises a cable assembly, and a plug and a socket which are respectively spliced with two ends of the cable assembly. The cable assembly is characterized in that the cable assembly comprises a mineral cable, a corrugated pipe wrapped outside the mineral cable, a positioning plate for fixing the mineral cable, and a stainless steel pipe welded with the positioning plate; the stainless steel pipe is internally provided with a glue pouring area and a switching jack contact piece; the switching jack contact piece is of a double-end jack structure, one end of the switching jack contact piece is electrically connected with the mineral cable core wire through a barewire, and the other end is plugged with the plug or the socket; the plug comprises a connecting nut, a spline housing, an insulator part, and a glass sintering part which is in butt joint with the double-end jack contact part; the socket is of an integrated structure formed by sintering a socket shell, a glass cake II and a double-end contact pin contact piece II through glass. The assembly provided by the invention is resistant to irradiation and aging and long in service life, and it is guaranteed that the product can still be used after being subjected to severe accident working conditionswhile the using requirements of a nuclear-grade K1-type electrical connector are met.

The invention relates to an aero-engine turbine rear case support plate long crack A-TIG welding restoration method. The method includes the following steps: S1, grinding and cleaning; S2, coating a crack with soldering flux; S3, argon arc welding; S4, benchwork grinding; S5, stress relief heat treatment; and S6, inspection. The idea of performing active TIG welding (A-TIG) to restore the long crack of a rear case support plate of an aero-engine turbine is put forwards in the method, the heat input of a welded joint is low, welding heat affected zones are reduced, and the mechanical property of the welded joint is improved. The deformation amount of an intermediate case is greatly reduced compared with that in a TIG welding method. The engine maintenance cost is greatly reduced and the engine maintenance period is shortened.