1224 results about "Friction welding" patented technology

The invention provides a parameter control method and system in the friction stir welding process, and relates to the technical field of welding equipment of metal materials. The method comprises the steps that before friction stir welding is started, working condition information of a to-be-welded workpiece is input into a welding process simulation model for virtual test welding; screening out a plurality of groups of standard process parameter combinations meeting preset welding quality requirements; in the friction stir welding process, the change trend of all the technological parameters is determined according to the real-time technological parameter combination within the first preset time period; and if it is determined that the deviation risk exists in the current welding state within the second preset time period in the future according to the change trend, the standard technological parameter combination with the maximum similarity with the real-time technological parameter combination in the standard technological parameter library is determined as the target technological parameter combination to conduct parameter control adjustment on the welding equipment. By implementing the method, the welding defects caused by sudden change of the process window can be overcome, and the stability of the welding process and the consistency of the welding seam quality are improved.

The invention relates to the technical field of solid-phase material adding, in particular to a friction stir welding material adding device and method. The friction stir welding material adding device comprises a workbench, a horizontal left-right moving mechanism is arranged at the upper end of the workbench, a horizontal front-back moving mechanism is arranged on the left side of the horizontal left-right moving mechanism, and a lifting mechanism is arranged on the left side of the horizontal front-back moving mechanism; a second moving frame is arranged on the left side of the lifting mechanism, a rotating shaft is rotationally connected into the lower end of the second moving frame, and a stirring head is fixedly connected to the lower end of the rotating shaft; a pneumatic rotating clamping jaw is fixedly connected to the bottom end in the second moving frame and is mounted on a rotating shaft; a supporting plate is fixedly connected into the second moving frame and rotationally connected with the rotating shaft, and a feeding mechanism is arranged at the upper end of the supporting plate. A feeding mechanism is arranged at the upper end of the second moving frame. According to the feeding device, manual feeding is not needed in the feeding process, so that the labor intensity of workers is reduced, and meanwhile, due to continuous feeding, the material adding effect is also improved.

The utility model belongs to the technical field of friction welding devices, and particularly relates to a heavy transmission shaft friction welding device which comprises a device base, two parallel transverse guide rails are fixedly connected to the top face of the device base, and a left spindle box is movably embedded in the top faces of the left ends of the two transverse guide rails. A left spindle box is movably embedded in the top faces of the right ends of the two transverse guide rails, a right spindle box is movably embedded in the top faces of the right ends of the two transverse guide rails, the right end of the left spindle box is fixedly connected with a left center clamp, the left end of the right spindle box is fixedly connected with a right center clamp, and the center line of the left center clamp and the center line of the right center clamp are coaxial. The telescopic polishing mechanism is arranged in the middle of the base of the device through the supporting frame to polish the welding end faces of the two transmission shafts, the welding end faces of the two transmission shafts to be welded are kept parallel, and therefore the two welding end faces can make full contact and rub at the beginning when friction welding is carried out; and the friction welding efficiency and the machining precision are improved.

The invention discloses a dissimilar metal friction welding interface regulation and control layer and an aluminum steel friction welding method. The dissimilar metal friction welding interface regulation and control layer comprises a micro-texture arranged on the metal surface, paste is laid at the micro-texture, and non-metal substances in the paste are completely volatilized before dissimilar metal metallurgical bonding; the welding method comprises the steps that a microstructure is prepared in a designated area on the surface of a stainless steel plate, Zn-20Al powder and ethyl alcohol are mixed and stirred into paste, then the paste is evenly laid on the microstructure area on the surface of base metal, and then friction stir welding is conducted. A welding joint obtained through the scheme is good in toughness (plasticity) and high in strength, atomic-level tight combination of a joint interface is achieved, the mechanical property of the joint is excellent, the joint is free of air hole and crack defects, the adverse effect of brittle intermetallic compounds on the mechanical property is weakened, the wetting spreading performance and the element diffusion capacity of the interface are enhanced, and the welding quality is improved. The obtained welding joint has a good mechanical embedding characteristic.

Provided is an electrical steel strip friction stir welding method that is able to inhibit the occurrence of coil joint fractures on a production line caused by deterioration of mechanical properties and shape of the coil joint while maintaining high work efficiency and that is also advantageous in terms of rotating tool durability. In the method, preheated double-sided friction stir welding is performed, diameter D (mm) of shoulders of rotating tools satisfies the relationship of the following Expression (7), and rotation speed RS (r / min) of the rotating tools, the diameter D (mm) of shoulders of the rotating tools, and joining speed JS (mm / min), expressed as RS×D3 / JS, satisfy the relationship of the following Expression (8), 4×TJ≤D≤10×TJ . . . (7), and 180×TJ≤RS×D3 / JS≤1500×TJ . . . (8).

The invention belongs to the technical field of inertia friction welding of high-temperature alloy thin-wall parts, and particularly relates to a homogenized grain type inertia friction welding device and method. The device comprises a base, an inertia friction welding rotation driving mechanism, a supporting shaft assembly, a synchronous vibration and shaping coupling mechanism and an inertia friction welding axial feeding mechanism, and the inertia friction welding rotation driving mechanism, the supporting shaft assembly, the synchronous vibration and shaping coupling mechanism and the inertia friction welding axial feeding mechanism are arranged on the base. The output end of the inertia friction welding axial feeding mechanism is connected with the fixed chuck, and inertia friction welding is conducted on workpieces on the upsetting side and the rotating side through axial feeding. One end of the supporting shaft assembly is connected with the base, the other end of the supporting shaft assembly is rotationally connected with the flywheel, and the supporting shaft assembly is used for supporting and preheating workpieces. The synchronous vibration and shaping coupling mechanism is arranged on the outer side of the welding seam area and used for conducting deformation suppression and grain refinement control on the welding seam area. According to the method, joint grains are refined uniformly, the forming precision is high, near-net forming is achieved, and the production efficiency is high.

The utility model belongs to the technical field of friction stir welding automatic tool changing, and particularly relates to a mechanical main shaft machine head device suitable for friction stir welding equipment. The automatic tool changing device comprises a mechanical main shaft capable of automatically changing a tool, a pipeline rotating mechanism used for containing a pipeline of the mechanical main shaft and a C-axis mechanism enabling the mechanical main shaft to steer, the C-axis mechanism comprises a twistable C-axis sleeve, and the mechanical main shaft is arranged in the C-axis sleeve in a sleeved mode. The pipeline rotating mechanism is fixedly mounted on the C-axis sleeve and rotates along with the rotation of the C-axis sleeve, so that a pipeline on the mechanical main shaft is twisted by + / -360 degrees through the pipeline rotating mechanism; a shaft shoulder and a welding tool are installed at the bottom of the mechanical spindle. The mechanical spindle automatic replacement welding tool is adopted, namely, the mechanical spindle with an automatic tool loosening and pulling function in the market is adopted and combined with a pipeline rotating mechanism, automatic replacement of a movable shaft shoulder welding tool with an inclination angle is achieved, and the mechanical spindle automatic replacement welding tool can also be applied to a static shaft shoulder.

The invention discloses a high-performance heterogeneously-welded special-shaped combustion chamber piston and a preparation method thereof, a special-basin-shaped combustion chamber and an oil duct structure are directly formed through a rolling process, and heterogeneously-connected between a head part and a skirt part of the piston is realized in combination with a nitrogen protection friction welding technology. The piston head is made of low-silicon high-chromium ferrite-based alloy, the skirt is made of quenched and tempered steel, non-quenched and tempered steel or nodular cast iron, and the welding face is designed to be in a wave shape so as to enhance the bonding strength. The preparation process comprises vacuum smelting, multi-pass rolling, precise welding and surface treatment, the combustion efficiency, the lightweight level and the reliability of the piston are remarkably improved, and the piston is suitable for high-load working conditions such as diesel engines and natural gas engines.

The invention relates to the technical field of friction stir welding, in particular to a friction stir welding temperature control method, system and equipment and a medium. The temperature control range value is calculated according to the material melting point; temperature distribution data of the advancing side, the retreating side, the stirring area core and the shaft shoulder action area are collected and divided; comparing the real-time temperature characteristic with the control range value to judge that the temperature is abnormal; calculating a stirring head rotation speed adjustment amount, an axial pressure change amount, and a welding travel speed correction value based on the abnormality determination result; when parameter adjustment is executed, torque and temperature field changes are monitored, and temperature control execution data are obtained; and finally, accurate regulation and control of the temperature field are realized through the control system. Accurate identification of temperature abnormity and accurate control of a local area are realized, and a closed-loop control mechanism based on torque monitoring is established.

The invention discloses a weldless integral high-strength feeding drill rod and a preparation method thereof. The drill rod comprises a female connector, an elevator groove, a thick-wall slip clamping section, a drill rod pipe body and a male connector which are integrally formed and have the same inner diameter. The drill rod is manufactured by integrally machining a solid bar or a thick-wall pipe body. The yield strength of the drill rod pipe body, the yield strength of the thick-wall slip clamping section and the yield strength of the elevator groove are 135 ksi-180 ksi, and the yield strength of the male connector and the yield strength of the female connector are 130 ksi-150 ksi; the outer diameter of the thick-wall slip clamping section is larger than that of the drill rod pipe body; the outer diameter of the elevator groove is smaller than that of the clamping section of the thick-wall slip; the outer diameter of the elevator groove is not smaller than that of the drill rod pipe body. The outer diameter of the connector does not need to be obviously increased, meanwhile, enough elevator lifting capacity is guaranteed, and the problem of poor structure performance caused by friction welding seams and welding area heat treatment is avoided. Complicated welding, postweld heat treatment and other procedures are omitted, the possibility that a weld joint serves as a performance weak link is avoided, higher comprehensive tensile mechanical performance is achieved, and the method is suitable for well drilling application of extra-deep wells, ocean deep wells and the like.

The invention relates to the technical field of friction welding machines, and discloses a friction welding machine sliding table control method and device.The method comprises the following steps that movement data of a friction welding machine stirring head are collected in real time, and a stirring head kinetic model is established; based on the mobile data and the dynamic model, outputting a preliminary control strategy through an optimal linear quadratic regulation control algorithm; on the basis of the movement data, future movement data of the stirring head are predicted through a prediction control algorithm, and a preliminary control strategy is optimized; a control signal is sent to a servo motor of the sliding table to control the servo motor; and the difference between the real-time movement data of the stirring head and the prediction result is used as feedback data, and control strategy parameters are adjusted. According to the method, the difference between the real-time movement data of the stirring head and the prediction result is used as feedback, a closed-loop control mechanism is formed, and control parameters are continuously monitored and optimized. The position control precision of the stirring head is improved, the problem of response lag in high-speed welding is effectively solved, the consistency of welding line tracks is ensured, and position deviation is avoided.

A friction stir welding apparatus includes a hollow stirring bar, a clamping mechanism, a welding machine main shaft, a supporting carriage, a cooling system, a coolant tank, a guide rail, and pipes. The cooling system is connected with the outer surface of the welding machine main shaft through two sealed bearings; the clamping mechanism is connected with the welding machine main shaft; the clamping mechanism clamps one end of the stirring bar; the other end of the stirring bar penetrates the welded workpiece to engage with the supporting carriage; the guide rail is installed below the supporting carriage; the pipes includes a first pipe and a second pipe; one end of the first pipe is connected with the outlet of the tank, and the other end of the first pipe is connected with the inlet of the cooling system. The second pipe returns the cooling medium to the tank.

The invention belongs to the technical field of friction welding, and relates to a friction welding machine capable of deburring, which comprises a machine tool, electric guide rails, a spindle box and a three-jaw chuck, the electric guide rails are mounted on both sides of the top of the machine tool, the spindle box is mounted on the machine tool, and the three-jaw chuck is mounted at an output shaft of the spindle box. The device further comprises a fixing mechanism and a burr removing mechanism, the fixing mechanism used for fixing a workpiece is arranged on the electric guide rail, and the burr removing mechanism used for removing burrs in the workpiece is arranged on the machine tool. After two hollow pipe workpieces are welded, the workpieces can be controlled to rotate, a polishing rod is operated to extend into the inner walls of the workpieces to polish burrs, and meanwhile a telescopic rod of an electric push rod can be controlled to extend to drive a polishing cutter to make contact with the outer walls of the welding positions of the two workpieces to polish the outer walls. And burrs of the inner wall and the outer wall of the welding position are ground together, a transfer procedure is not needed, operation is more convenient, and efficiency is higher.

The invention provides a friction welding method and a connection structure. A conical bonding pad connects a far-end component and a near-end component with a conical hole for accommodating the conical bonding pad; the method comprises the following steps: clamping the clamping end; during primary forging, the clamping device is controlled to drive the conical bonding pad to rotate for the primary forging time length at the primary forging rotating speed, the pressure jacking device jacks the contact end towards the direction of the far-end component at the primary forging pressure, and the bonding pad rubs against the far-end component; the initial forging rotating speed is 5%-45% of the theoretical range, the initial forging pressure is 55%-95% of the theoretical range, and the initial forging duration is 5%-45% of the theoretical range; during finish forging, the rotating speed of the clamping device is controlled to be zero, the pressure jacking device jacks the conical bonding pad towards a far-end component for finish forging duration and extrudes melt under finish forging pressure, the finish forging pressure is larger than the initial forging pressure, the welding power is reduced in a low-speed short-time and certain-high-pressure mode, the welding equipment is made to meet the requirements for miniaturization and light weight, field operation can be conducted, and the welding efficiency is improved. The melt is extruded from the side face of the conical bonding pad, impurity discharge is promoted, and the welding quality is improved.

A robot wire-filling friction stir welding and solid-phase additive manufacturing device, comprising: a robot (1), a robot friction stir welding main shaft (4) arranged on the robot (1), a main-shaft control device (2), an industrial control computer (3), a robot control device (5), a welding worktable (6) and a push-pull wire feeder (7), wherein the robot friction stir welding main shaft (4) comprises a stir welding main shaft (8), an adapter sleeve (9), a cutting tool shank (10), a locking fixing sleeve (13) and a stirring head, there being two types of stirring head: a wire-filling welding stirring head and a wire-filling additive stirring head. On the basis of a heavy-duty robot, the device drives the friction stir welding main shaft to perform a welding motion, and a spiral milling cutter (11-3) of the stirring head crushes and granulates a wire fed in by the push-pull wire feeder (7), and granular wires are conveyed to a welding region / additive region by means of a material guide thread on a stirring pin, thus realizing robot wire-filling friction stir welding and robot wire-filling solid-phase additive manufacturing, and solving the problems of solid-phase friction stir welding for the connection of small-batch and multi-variety lightweight alloy welding members and high-efficiency additive manufacturing of large-sized lightweight alloy structural members in the aerospace industry.

The invention provides a friction stir welding seam intelligent correction method based on visual identification, and relates to the technical field of friction welding. Image information of a welding seam area of a to-be-welded workpiece is collected in real time, image feature points are recognized, and the spatial pose of the welding seam area is obtained through a spatial transformation model; based on the space position deviation of the actual space pose and the theoretical welding track, a dynamic deviation correction path is generated; and a multi-point iterative optimization algorithm of motion control parameters and a real-time feedback control method are further adopted, so that high-precision real-time adjustment and dynamic compensation of the welding seam track are realized. According to the method, the accuracy and the stability of friction welding seam deviation rectification are remarkably improved.

The invention belongs to the technical field of surface strengthening, and particularly relates to an aluminum alloy friction stir welding seam fatigue-free method based on rolling strengthening. The method comprises the following steps: (1) carrying out a microhardness test and a tensile test on an aluminum alloy matrix to obtain the hardness and tensile strength of the matrix; and (2) friction stir welding is conducted. The tensile strength after friction stir welding is not lower than 65% of the fatigue strength of a base body by adjusting friction stir welding process parameters; and (3) the surface of the friction stir welding part is treated. The surface of the welding seam is polished through an angle grinder and abrasive paper, so that the surface roughness of the welding seam reaches about Ra1.2 microns; and (4) rolling surface strengthening is carried out. Surface strengthening process parameters are adjusted, so that the surface hardness of a heat affected zone of the weld joint subjected to surface strengthening is not lower than the surface hardness of a matrix, the surface roughness Ra is not higher than 0.5 mu m, and the surface residual compressive stress is not lower than 100 MPa; and (5) carrying out a fatigue test.

A method of joining polymer-lined pipe sections end-to-end comprises friction welding a polymer liner bridge fitting to parent liners of the pipe sections and welding metallic outer pipes of the pipe sections to each other before, during or after the friction welding operation. The fitting may be engaged telescopically with the pipe sections in socket formations formed by the parent liners. Friction welding is effected by relative rotational movement between the fitting and the pipe sections about a common longitudinal axis. A spinning tool is advanced longitudinally within at least one of the pipe sections, inserted into the fitting, anchored within at least one of the pipe sections, engaged with the fitting and rotated to effect the relative rotational movement. This friction-welds the fitting to the parent liners simultaneously at interfaces located at respective ends of the fitting.

The invention relates to the technical field of friction welding, in particular to a friction welding machine. Comprising a bottom plate, a supporting frame I, a supporting frame II, a sliding plate I, a clamp, a sliding plate II, a connecting cylinder, a rotating frame and the like, the supporting frame I and the supporting frame II are both installed on the bottom plate, the sliding plate I is slidably arranged on the supporting frame I, the clamp is rotatably installed on the sliding plate I and used for fixing a welding part, and the sliding plate II is slidably arranged on the supporting frame II. The connecting cylinder is installed on the sliding plate II, and the rotating frame is rotationally installed in the connecting cylinder. Through cooperation of the clamp, the connecting cylinder, the rotating frame, the guide rod, the movable frame, the sliding rod, the polishing knife, the translation mechanism, the rotating mechanism, the adjusting mechanism and the clinging mechanism, a welding piece can be welded to the surface of a product through high-speed rotating friction, and then residues on the surface of the product are polished through the polishing knife; therefore, residues on the surfaces of the products are automatically removed, use is convenient, and time and labor are saved.

The invention relates to a friction stir welding tool, and belongs to the technical field of cooling fin machining, the friction stir welding tool comprises a placing table and a tool unit arranged on the placing table, and the tool unit comprises a horizontal clamping assembly, a pressing seat and a pneumatic connecting rod assembly; the horizontal clamping assembly is used for pressing the cooling fin component located on the upper portion to the cooling fin component located on the lower portion, the pressing base is movably arranged on the containing table and used for pressing the cooling fin component located on the upper portion, and the starting connecting rod assembly is used for adjusting the pressing base to press or loosen the cooling fin component located on the upper portion. The welding device has the advantage that the welding efficiency of the cooling fin component is improved.

The invention relates to an eddy current test block for an inertia friction welding assembly and a preparation method of the eddy current test block, the eddy current test block comprises an annular test block, and a first notch groove group, a second notch groove group and a third notch groove group on the annular test block, the first notch groove group comprises a first vertical notch groove and a first parallel notch groove; the second notch groove group comprises a plurality of second parallel notch grooves which are respectively formed in the inner circular surface and the outer circular surface and are parallel to the weld joint surface; the third notch groove group comprises a plurality of notch groove pair groups, each notch groove pair group comprises a plurality of third vertical notch groove pairs and third parallel notch groove pairs, the circumferential distances between the third vertical notch groove pairs arranged on the inner circular surface and the outer circular surface are different, and / or the circumferential distances between the third parallel notch groove pairs arranged on the inner circular surface and the outer circular surface are different. According to the method, the defect equivalent of the inertia friction welding assembly with curvature can be accurately and comprehensively evaluated, and misjudgment and missed judgment of defects are avoided.

The invention provides an inertia friction welding system and method capable of adjusting pressure, relates to the field of inertia friction welding, and aims to solve the problems that cracks and flashes possibly appear in a welding area due to improper control of welding pressure and temperature at present, and particularly, a workpiece is prone to instability and deformation due to large post-peak torque in the welding ending stage. The torque of workpieces to be welded and the temperature of a welding friction interface in the welding process are obtained through the strain gauges and the temperature monitor, the pressure between the workpieces to be welded is adjusted through the servo feeding assembly, and temperature monitoring in the inertia friction welding process can be achieved through the temperature monitor; the structure property deterioration caused by too high welding temperature is avoided by adjusting the friction pressure, and the welding joint quality is improved; by means of the strain gauges, torque monitoring in the inertia friction welding process can be achieved, overlarge rear peak torque is avoided by adjusting friction pressure, instability deformation is prevented, welding forming is improved, and the quality problems of instability deformation, flash cracking and the like are effectively reduced.

The utility model relates to the technical field of pipeline processing, in particular to a rotary friction welding device for a large-pipe-diameter pipeline, which comprises a placing frame, the pipeline is placed on the placing frame, a pipeline clamping mechanism is installed at the front end of the placing frame to clamp the pipeline and align to a joint, and the joint is clamped in a joint profiling welding tool and is driven by a welding standard machine to rotate and feed. A tail plate is arranged at the rear end of the placing frame, the tail plate moves at different positions of the track to be connected with the pipeline in a clamping mode, pipeline products of different lengths are welded, a connector profiling tool opposite to the connector profiling welding tool is arranged on the tail plate, and the connector profiling tool is matched with the connector profiling welding tool to adjust the relative angle of connectors welded to the two ends of the pipeline. The situation that the installation condition of a client cannot be met due to too large relative angle deviation is prevented; the welding device is used for solving the problem of welding of the pipeline and the connector, welding of the pipeline and the connector can be rapidly achieved at low cost, and the installation requirement and the market requirement of the energy storage pipeline are met.

The invention relates to the technical field of welding, and discloses a friction stir welding control method and equipment, and the method comprises the following steps: establishing a multi-physical field model, collecting data in real time, estimating an internal state through data assimilation, predicting future evolution, and adopting model prediction control to determine and apply an instruction; carrying out online learning on continuous adjustment model or control strategy parameters; the system comprises a model establishment module, a data acquisition module, a state estimation module, a state prediction module, a control decision and execution module and an online learning module. According to the method, the internal state is accurately estimated online through model and data assimilation, and the sensing precision is improved; realizing prospective adjustment based on state prediction and model prediction control; a multi-target cost function is introduced to intelligently balance multi-dimensional performance; an online learning mechanism is integrated, and the adaptability and robustness of the system are enhanced; a complete intelligent closed-loop control system is constructed, and the automation and intelligence level is improved.

The invention provides a method for improving fluidity of weld metal in friction stir welding of dissimilar aluminum alloy, and belongs to the technical field of friction stir welding of dissimilar metal. The method comprises the following steps that 7075 and 6061 aluminum alloy plates are in butt joint and fixed, and friction stir welding is conducted; and the ratio of the length of a stirring needle for friction stir welding to the thickness of the aluminum alloy plate is 0.675-0.725. The metal fluidity and hardness distribution uniformity of a welding joint of dissimilar aluminum alloy friction stir butt welding are influenced by regulating and controlling the needle length of the stirring needle. And when the ratio of the length of the stirring needle to the thickness of the plate is 0.7, the elliptical onion ring formed in the nugget zone of the welding joint is complete in structure, the number of circles is large, and the whole position is moderate, so that the weld metal fluidity of the welding joint is better, and the hardness distribution is more uniform.

The invention discloses a friction stir welding process for a copper-aluminum alloy. The friction stir welding process sequentially comprises the steps of pressing, dotting, plug mounting, clamping, welding and plug dismounting. The combination problem caused by material difference is solved through negative clearance close fit and hydraulic press fit of the copper part bulge and the aluminum part groove; a wide supporting surface plug with a heat insulation layer is adopted to prevent welding collapse; a preset tool ensures stable clamping; the preset stirring head design improves the fusion depth and material mixing effect; and the welding seam performance is guaranteed through post-welding treatment and multi-dimensional detection. According to the process, the limit of copper-aluminum double-sided friction stir welding is overcome, and the requirements of a liquid cooling heat dissipation system and other harsh scenes for sealing performance, strength and corrosion resistance are met.

A friction stir welding device includes: a pin extending along an axis; a shoulder having a cylindrical shape and coaxially surrounding an outer periphery of the pin; and a driver that allows the pin and the shoulder to rotate about the axis and to advance and retract along the axis individually. The shoulder includes a shoulder main body having a distal end to be plunged into a welding target, and a shoulder adapter having a fit hole in which a proximal end of the shoulder main body is shrink-fitted and connecting the shoulder main body and the driver to each other.

The invention provides an aluminum steel friction welding method based on additive and subtractive microtexture interlocking and regulation, which comprises the following steps: constructing a surface subtractive microtexture in a to-be-welded area of an aluminum plate to obtain a to-be-welded aluminum plate, constructing an additive microtexture matched with the surface subtractive microtexture in a to-be-welded area of a steel plate by using alloy powder to obtain a to-be-welded steel plate, and welding the to-be-welded steel plate with the additive microtexture. Then, after the surface subtractive microstructure on the to-be-welded aluminum plate and the additive microstructure are matched to form an interlocking structure, welding is conducted through a friction welding technology; in the friction welding process, a friction welding tool head acts on the top face of the steel plate. Compared with traditional friction stir welding, the friction stir welding method has the advantages that under the condition that the physical form of the microstructure of the base metal is not changed, by means of continuous layered distribution of the brittle phase of the microstructure discrete interface of the high-entropy alloy, hole outlet of a welding material is avoided, and the strength of a joint is improved.

The invention discloses a processing method of a high-flow supercharger turbine shaft, which improves the processing and manufacturing efficiency of the turbine shaft and reduces the production cost in batch production. A machining method for a large-flow supercharger turbine shaft comprises the following steps that S1, a welding optical axis blank is machined, and a welding optical axis is obtained; s2, the welded turbine disc blank is machined, and the welded turbine disc is obtained; s3, the welding optical shaft and the welding turbine disc are installed and welded through friction welding, and a welding turbine shaft is obtained; and S4, the turbine shaft is machined and welded, and a turbine shaft finished product is obtained.

The utility model discloses a friction welding tool for a water cooling plate of a new energy battery box body, which comprises a base, a welding platform with a rectangular structure is arranged in the middle of the base, the welding platform is used for placing the water cooling plate, and top pressing components positioned on the periphery of the welding platform are distributed on the base. Each top pressing assembly can exert downward pressure on the circumferential edge of the water-cooling plate so that the water-cooling plate can be pressed on the top of the welding platform, a limiting assembly and a horizontal pushing assembly are arranged at the two opposite ends, corresponding to the welding platform, of the base correspondingly, and after the water-cooling plate is installed on the welding platform, the limiting assembly abuts against one end of the water-cooling plate, and the horizontal pushing assembly abuts against the other end of the water-cooling plate. The horizontal pushing assembly can apply pushing force in the horizontal direction to the other end of the water cooling plate. The water cooling plate friction welding device has the beneficial effects that through the arrangement of the horizontal pushing assembly and the limiting assembly, force can be additionally applied to the water cooling plate in the horizontal direction, the friction welding can be more stable in cooperation with downward force applied by the top pressing assembly, and then the overall air tightness of the water cooling plate after welding is guaranteed.