1589 results about "Weld strength" patented technology

The invention relates to the technical field of laser welding, in particular to a laser welding system control method for metal accessories. The method comprises the following steps that automobile industry metal fitting data are obtained, welding demand analysis is conducted according to the automobile industry metal fitting data, and therefore welding demand data are obtained; laser welding feature extraction and resistance spot welding feature extraction are carried out according to the welding demand data, so that laser welding data and resistance spot welding data are obtained; carrying out welding simulation according to the laser welding data and the resistance spot welding data so as to obtain welding simulation data; welding form feature extraction and welding strength feature extraction are carried out according to the welding simulation data, so that welding form data and welding strength data are obtained; and carrying out welding defect detection according to the welding form data and the welding strength data so as to obtain welding defect data. Automatic adjustment and accurate control of the laser welding process are achieved based on the laser welding technology.

The invention discloses a gradient welding strength control method and system for a welded galvanized steel pipe for fire fighting, particularly relates to the technical field of welding automation control, and aims to solve the problem of abnormal welding seam strength gradient caused by instantaneous unbalance of an electric field and a thermal field during dynamic parameter switching in the prior art. Electromagnetic distortion characteristic quantity is extracted through frequency domain energy analysis, and thermodynamic offset state quantity is deduced in combination with a thermal diffusion trend; on the basis of frequency band correlation mapping of electromagnetic and thermodynamic parameters, thermoelectric cooperative imbalance levels are divided through mutual information entropy evolution, and a self-adaptive harmonic attenuation weight tuning instruction is generated; analyzing a mismatching relation between transient disturbance of an environment magnetic field and arc voltage modulation distortion in real time, dynamically generating a magnetic field compensation factor and reversely superposing the magnetic field compensation factor to a control instruction; and in combination with the matching degree of molten pool oscillation energy and a harmonic frequency spectrum, correcting wire feeding rate calibration, reconstructing a multi-band harmonic energy proportion spectrum, outputting an anti-interference welding control signal, and realizing dynamic balance between arc stability and molten pool heat input.

The invention provides an ultrafast laser welding method and device for large-spacing heterogeneous materials. The ultrafast laser welding method specifically comprises the steps that a lower workpiece and an upper workpiece are stacked and clamped through a clamp; a laser beam is collimated, then enters a scanning galvanometer and is focused through a field lens after being emitted, first scanning laser energy is absorbed by a lower-layer material to generate plasma, the plasma continuously expands and overflows, meanwhile, the lower-layer material is melted to fill a gap, and the quasi-optical contact condition is achieved; free expansion of plasmas in second scanning is effectively inhibited, laser energy is limited near a welding seam, the melting volume of the area is remarkably increased, and the welding strength is remarkably improved; and the third scanning and the second scanning are consistent in mechanism, the material melting amount is increased, and finally welding head strengthening is achieved. Through the scanning galvanometer and the field lens, a focusing light spot moves along a specified route in the contact surface of the upper and lower workpieces, so that the workpieces are melted and combined. After three times of scanning, the large-spacing heterogeneous material can finally obtain a high-strength and high-quality welding joint.

The invention relates to the field of aluminum material shearing, in particular to aluminum material shearing equipment for aluminum material display rack machining. Comprising a workbench, cutting equipment, a driving assembly, an electromagnet, a magnetic piece, a push rod I, a rotating block I, a supporting rod, a telescopic rod, a supporting block and the like. The workbench is fixedly connected with a driving assembly; the driving assembly is connected with cutting equipment; the driving assembly is connected with an electromagnet; the electromagnet is magnetically connected with a magnetic sheet; the magnetic sheet is fixedly connected with a supporting rod, and the supporting rod is connected with a rotating block I; the rotating block I is rotationally connected with a telescopic rod; the telescopic rod is connected with a supporting block. The supporting blocks are used for supporting the interiors of the aluminum strips, so that the cut positions of the aluminum strips cannot be bent and deformed inwards, and the problems that when the aluminum strips are cut, the cut positions of the aluminum strips can be bent and deformed towards the interiors of the aluminum strips, the aluminum strips cannot be completely attached during follow-up welding, the welding strength is low, and the welding difficulty is increased are solved.

The auxiliary butt joint device for pipeline welding comprises a left connecting frame and a right connecting frame, the left connecting frame and the right connecting frame are fixed in a horizontal state, and a left butt joint assembly and a right butt joint assembly which enable two pipelines to be in butt joint are arranged on the opposite sides of the left connecting frame and the right connecting frame respectively. The left butt joint assembly and the right butt joint assembly each comprise a bottom frame body, an extrusion alignment assembly, a pressing driving assembly and a supporting adjusting assembly. The extrusion alignment assembly can push the two pipelines to synchronously move in the opposite directions, so that the problems of misalignment, non-uniform gaps and the like in the butt joint process of the two pipelines are avoided, the welding effect and the welding strength of the pipelines are improved, and manual butt joint by workers is not needed; the supporting and adjusting assembly enables the center lines of the two pipelines to completely coincide, workers do not need to adjust the positions of the pipelines in the working process, the labor intensity and the engineering cost are reduced, the working progress is accelerated, and the pipeline welding efficiency is remarkably improved.

The invention relates to the technical field of welding strength detection, and discloses a communication system sub-element packaging welding strength detection device, which comprises a push-pull force testing machine main body, a clamp is arranged in the middle of the bottom surface of the push-pull force testing machine main body, and consoles are arranged on the two sides of the push-pull force testing machine main body. And an operation handle and a plurality of control keys are arranged on one console. According to the packaging welding strength detection device for the communication system sub-element, when parts such as the protective shell and the test module need to be controlled to descend quickly, the impact ball can impact the surface of the ejector rod to make a sound for reminding; meanwhile, when the chip is in place, a triangular plate and two first arc-shaped elastic conducting strips form circuit series connection and then buzz is made to remind an operator that the testing head is about to reach a designated position, so that the testing head can be controlled to rapidly reach the designated position, and meanwhile damage caused by collision between the testing head and the chip is avoided.

The invention relates to the technical field of spring production processes, and discloses a corrugated spring manufacturing process which comprises the following steps: S1, taking a steel wire rod main body with a rectangular section, winding into a corrugated circular ring, and cutting off at a position where the steel wire rod main body is wound for one circle; s2, laser welding is conducted on the cut-off position through optical fiber laser welding equipment, and a blank piece is obtained; s3, the blank is subjected to heat treatment to eliminate internal stress, and a semi-finished product is obtained; s4, the semi-finished product is subjected to surface treatment, and a finished product is obtained.The corrugated ring is directly formed, the corrugated treatment process is omitted while a flat ring is rolled, only stress heat treatment needs to be conducted on the product obtained after wave pressing forming, and the machining time and the production cost are saved; according to the process, the welding seam strength is optimized by optimizing laser welding conditions, oxidation and decarburization of workpieces are reduced by controlling the heat treatment heat preservation time after welding, meanwhile, the deformation stress of the spring is thoroughly eliminated, and the fatigue life and the use performance of the spring are more unified and stable.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention relates to the field of laser micro-nano machining, in particular to an ultrafast laser high-stability welding method and device for heterogeneous materials, effectively solves the problem of welding defects caused by unstable metal surfaces during ultrafast laser welding of large-diameter transparent / metal heterogeneous materials, effectively improves the welding strength and stability, and improves the welding quality. And the mirror surface and non-mirror surface metal welding quality unification is realized. The method specifically comprises the steps that the light emitting mode of ultrafast laser is adjusted, monopulse output is converted into Burst pulse string output, the ultrafast laser in the Burst output mode is used for conducting polishing pretreatment on the surface of the metal material, stable control over the surface quality of the mirror surface and the surface quality of the non-mirror surface metal can be achieved, and the surface roughness after polishing can be controlled to be smaller than lambda / 4; the transparent material and the polished metal material are welded through ultrafast laser, stable control over the welding strength of the heterogeneous material can be achieved, and the welding strength of the mirror-surface metal material is close to that of the non-mirror-surface metal material.

The invention relates to the technical field of batteries, in particular to a battery cell cover plate and a battery cell. The battery cell cover plate comprises a cover plate main body provided with a mounting hole; the pole is arranged in the mounting hole; the riveting piece is riveted with the pole post and then is welded with the pole post; the welding joint of the pole and the riveting piece is filled with the welding filling piece, and the melting point of the welding filling piece is lower than that of the pole and that of the riveting piece. The welding filling piece is filled at the welding joint of the pole and the riveting piece, so that the pole and the riveting piece can be wrapped after the welding filling piece is heated and melted, and the welding strength of the pole and the riveting piece is ensured; the melting point of the welding filling piece is lower than that of the pole and the riveting piece, so that the welding filling piece cannot generate high temperature after being melted, the influence of thermal deformation of the riveting piece is small, the flatness of the riveting piece is effectively improved, the appearance of the welding area of the pole and the riveting piece is improved, the appearance yield of the cell cover plate is improved, and the production cost is reduced. Therefore, the safety and the yield of the battery cell are improved.

The invention relates to the technical field of spiral drill rod production, and discloses welding equipment for a low guide vane spiral drill rod, which comprises a welding machine tool for the spiral drill rod, a spindle box is arranged on the welding machine tool for the spiral drill rod, a tailstock is arranged on the welding machine tool for the spiral drill rod, and chucks are arranged on the spindle box and the tailstock. The spiral blade can be screwed to be loosened and locked on the drill rod under the reverse control of the two adjusting motors, so that the tightness of the spiral blade on the drill rod can be effectively adjusted, the welding surface can be more tightly attached to the drill rod by adjusting the tightness of the spiral blade, the welding defects such as air holes and slag inclusion are reduced, and the welding quality of the drill rod is improved. Therefore, the welding strength is greatly improved, the improvement of the welding strength means the enhancement of the overall performance of the drill rod, in the drilling process, the drill rod with high welding strength can bear larger torque and tension, the downtime caused by breakage or falling of the drill rod is shortened, and the drilling efficiency is improved.

The invention belongs to the technical field of welding devices, and particularly relates to an electric actuator shell automatic welding device which comprises a mounting frame, a supporting frame is fixedly connected to the upper side wall of the mounting frame, a control cabinet is fixedly connected to the side wall of the supporting frame, and a vertical electric push rod is fixedly connected to the upper side wall of the supporting frame. The moving end of the vertical electric push rod penetrates through the supporting frame. When the nameplate is welded to the surface of the electric actuator in a spot welding mode, the welding strength of the nameplate can be automatically detected, and when insufficient welding of a nameplate welding spot is detected, an operator can be timely reminded to carry out repair welding on the nameplate, so that the welding strength of the nameplate is guaranteed, and the welding efficiency of the nameplate is improved. And when four welding spots of the nameplate are detected, the abrasion degree of the welding electrode on the side can be analyzed by recording the frequency of pseudo soldering of a certain welding spot, and then the abraded welding electrode is polished, so that the welding performance of the welding electrode is ensured.

The invention relates to the technical field of semiconductor packaging, and provides a semiconductor packaging process which comprises the following steps: obtaining a circuit board, and preprocessing the circuit board; performing SMT assembly operation on the bottom surface of the circuit board; silk-screening solder paste on the top surface of the circuit board; a tin cap of the flip chip is dipped with a soldering flux; mounting a flip chip and other elements on the top surface of the circuit board; performing reflow soldering operation on the top surface of the circuit board; according to the semiconductor packaging process provided by the embodiment of the invention, the tin cap of the flip chip can be dipped with the soldering flux before confluence welding operation is carried out on the flip chip, so that in the reflow soldering process, the soldering flux can effectively protect the tin cap and a PCB bonding pad and prevent oxidation, the collapsed tin cap can recover the original state of the tin cap to the greatest extent during reflow soldering, and the reliability of the flip chip is improved. The tin cap can be in contact with the PCB bonding pad more effectively, good welding is formed, the wettability is improved, oxidation is reduced, the welding strength is enhanced, and the problems of pseudo soldering, open circuit and the like are reduced.

This invention relates to the technical field of welding equipment, and in particular to a welding machine for valve assembly, comprising a main ring, a base, a slide, clamping plates, and welding rods. The main ring has a horizontal axis and rotates around its own axis. The base is fixed on the main ring and rotates synchronously with it. The slide is slidably mounted on the base in a direction perpendicular to the axis of the main ring. Both clamping plates are mounted on the slide. By inserting the welding rod into the gap between the flange and the valve body for welding, the welding strength and quality of the mating surfaces can be effectively improved, enabling comprehensive and effective welding of the valve and improving the valve processing quality. The main ring drives the welding rod to perform circular motion, and the slide moves on the base and feeds the welding rod, realizing an automatic welding process and improving production efficiency.

The utility model relates to the technical field of battery manufacturing, and particularly discloses a battery, a battery pack and a power utilization device. The battery comprises a cover body and a shell, the cover body is welded to an opening of the shell and forms a welding seam, a reinforcing boss is arranged in a heat affected zone of the welding seam on the inner wall of the shell, and the reinforcing boss is continuously arranged along the circumferential surface of the inner wall of the shell. According to the invention, the reinforcing boss is additionally arranged in the heat affected zone, which is a certain distance away from the weld joint, of the side wall of the shell, so that the position of the side wall of the shell is thickened and reinforced, the welding strength is effectively improved, and the situation that the area is fragile and cracks before the anti-explosion valve to cause heat diffusion when the battery cell is subjected to emergencies such as thermal runaway and the like is avoided. According to the battery, the welding reliability of the cover body and the shell is improved, and the safety performance of the battery under special conditions is enhanced, so that the production yield is increased, and the production cost is reduced.

The invention provides a high-hardness cobalt-based alloy welding wire and a preparation method thereof, and the high-hardness cobalt-based alloy welding wire comprises the following components in percentage by mass: less than or equal to 0.5% of C, 3-4% of Si, 15-20% of Cr, 1-4% of Ni, 25-30% of Mo, 45-55% of Co, less than or equal to 1% of Fe, less than or equal to 0.02% of La, less than or equal to 0.02% of B, less than or equal to 0.01% of S and less than or equal to 0.01% of P. According to the cobalt-based welding wire, through regulation and control of alloy elements, the hardness of the cobalt-based welding wire is remarkably improved, the uniformity of components of the welding wire is improved, the welding strength is improved, the size of the welding wire is extremely thin, and the welding manufacturability of the welding wire is improved.

The invention relates to the technical field of five-axis hybrid robot error compensation, in particular to a five-axis hybrid robot tail end pose error compensation method and system. The method comprises the following steps: acquiring vehicle body welding demand data and analyzing the welding strength difference between welding spots; thirdly, the theoretical contact strength of the manipulator is matched according to the welding strength difference data, the heat conduction toughness loss of adjacent welding spots is simulated, and the toughness influence gradient of the heat chain reaction is further recognized; then, carrying out regional gridding processing on the toughness influence gradient data, regulating and controlling the contact force of the manipulator, and learning a tail end pose error compensation strategy; and finally, designing automatic firmware based on the compensation strategy, and embedding the automatic firmware into the bottom layer of the robot to ensure that the tail end pose error is accurately compensated. According to the method, the error compensation technology of the five-axis hybrid robot is optimized, so that the error compensation technology of the five-axis hybrid robot is more perfect.

The invention relates to the technical field of forge piece forming, in particular to a deep-cavity thin-wall support forge piece, a forging die and a forming method.The deep-cavity thin-wall support forge piece is characterized in that a heated round bar is subjected to roll forging to obtain a preformed blank, and oxide skin of the blank obtained after roll forging is removed; putting the prefabricated blank into a pre-forging cavity of a forming die, and performing pre-forging forming; after pre-forging is finished, the pre-forged piece is transferred into a precision forging cavity of the same forming die to be subjected to precision forging forming, and a bilaterally symmetrical precision forging piece is obtained; putting the bilaterally symmetrical precision forgings into a slicing die frame for trimming, and cutting off flashes; cutting the bilaterally symmetrical precision forgings subjected to cold shaping from the shunting bin through a cutting device, and separating the bilaterally symmetrical precision forgings into two independent single forgings; forming defects are eliminated, and the forging yield is improved to the level of stable mass production; the thickness tolerance of the functional surface of the product is ensured, the spot welding current stability and the welding strength are ensured, the assembly requirement is met, and the dependence on subsequent machining is reduced; the material cost is reduced and the mold life is prolonged.

The invention provides a welding method and device based on sinusoidal modulation Burst mode ultrafast Bessel light, and the welding method comprises the following steps: S1, a first workpiece to be welded is stacked above a second workpiece, optical contact is formed between the first workpiece and the second workpiece, and the first workpiece is made of a transparent material; s2, outputting ultrafast laser by a laser, and performing time and space shaping on the ultrafast laser to form ultrafast Bessel light in a sinusoidal modulation Burst mode; and S3, the light path is adjusted, ultrafast Bessel light in the sinusoidal modulation Burst mode acts on the target welding area, and welding of the transparent material is achieved. According to the method, ultrafast Bessel light in a sinusoidal modulation Burst mode is formed by conducting time and space shaping on ultrafast laser to act on a target welding area, the stable heating and melting process of a transparent material can be achieved, excessive heating of plasma can be greatly avoided, the ultrafast laser energy of an overall injection sample is reduced, and the welding quality of the transparent material is improved. And the welding strength and stability are improved.

The invention discloses a brazing method for improving the welding strength of a polycrystalline diamond cutter and a hard alloy. The brazing method comprises the following steps that S1, brazing filler metal alloying is conducted; and S2, the PCD tool bit and the hard alloy matrix are subjected to vacuum brazing. According to the brazing filler metal, an Ag-Cu-Co system is adopted, Ag mainly plays a role of a solder matrix and provides plasticity and thermal conductivity, Cu mainly plays a role of forming an eutectic structure with Ag and reducing the melting point, and Co mainly plays a role of wetting the surfaces of PCD and hard alloy. Co infiltration is adopted in the preparation process of the PCD tool bit used in the method, so that a certain amount of Co exists on the PCD surface, and the hard alloy tool body also contains Co, and therefore, a small amount of Co in the brazing filler metal can better wet the welding surface according to the similar intermiscible principle. In the vacuum brazing process, additional pressure does not need to be applied, when the brazing filler metal is molten, the brazing filler metal is evenly laid on the welding face under the action of the pressure of the PCD tool bit on the upper portion and the capillary effect, the redundant brazing filler metal can flow out of the two sides of the mold, and the flatness of the welding surface can be effectively guaranteed.

A ceramic capacitor with double L-shaped pins comprises two supports arranged oppositely, one or more ceramic chips arranged between the two supports and two first solder layers respectively arranged between the end portions of the one or more ceramic chips and the opposite supports, and each support comprises two frames arranged symmetrically and a second solder layer arranged between the two frames. According to the invention, the structure of the ceramic capacitor is limited, and the two symmetrically arranged frames are mutually welded through the welding flux to serve as the support, so that the welding area of the prepared support and the PCB is doubled, the welding strength of the prepared ceramic capacitor is improved, the bonding strength of the ceramic capacitor and the PCB is better, and the service life of the ceramic capacitor is prolonged. Compared with a single-frame ceramic capacitor, the ceramic capacitor can resist higher-strength vibration, improves the reliability of a product, and can be applied to high-reliability occasions such as space flight and aviation.

The invention provides a welding method of an aluminum nitride ceramic heating plate, which comprises the following steps of: firstly, accurately grinding and cleaning a welding surface of an aluminum nitride sleeve and a welding surface of an aluminum nitride plate body, and then printing and coating a welding layer material Y2O3-CaCO3-SiO2-MgO on the welding surface of the aluminum nitride sleeve and the welding surface of the aluminum nitride plate body; and finally sintering to obtain the aluminum nitride ceramic heating plate with good sealing performance, high welding strength and high heat conductivity, and the aluminum nitride ceramic heating plate is suitable for large-scale popularization and application.

The invention discloses a welding fixing clamp for mechanical manufacturing, and relates to the technical field of clamps, the welding fixing clamp comprises a mounting plate, a clamping assembly is arranged at the position, close to the center, of the top of the mounting plate, and a detection assembly is arranged at the position, close to the edge of one side, of the top of the mounting plate; according to the welding fixing clamp for mechanical manufacturing, in the mechanical manufacturing process, when a cylindrical steel pipe needs to be welded, firstly, the steel pipe needing to be welded is placed in an arc-shaped rod, the position of the center line of the pipe is scanned and detected through a laser scanner, and the steel pipe is moved to the position of the center line of two clamping blocks under the action of a conveying device; according to the fixing clamp for welding the pipeline, the clamping assembly is arranged, the pipeline is clamped, the center line of the pipeline is aligned with the center line of the clamping assembly, so that the clamping force of the fixing clamp for welding the pipeline to the pipeline is uniform, and the problem that in the prior art, the clamping force of the fixing clamp for welding the pipeline to the pipeline is not uniform, and the pipeline welding strength is reduced is solved.

The invention relates to the field of welding equipment, and discloses automatic welding equipment for aluminum wire harnesses, by arranging a welding room, the welding room can still weld and cool other welding parts in the process that workers take the welding parts, the working time is greatly shortened, the working efficiency is improved, meanwhile, a welding fume purifier is provided with various templates, and the welding fume purifier is more convenient to use. According to the welding machine, the terminals in various shapes can be matched and fixedly welded, the thickness of the terminals can be detected through the arranged clamping assembly, meanwhile, the welding strength of the wire harness and the terminals is improved, the welding duration and the welding power of the welding machine can be accurately adjusted by detecting the thickness of the terminals, the welding quality of the welding machine is improved, and the welding efficiency is improved. And the arranged detection mechanism can improve the welding quality of the wire harness and the terminal, prevent the wire harness and the terminal from being in an inclined state, improve the welding firmness, prevent the wire harness and the terminal from being mutually rubbed and damaged during later use, and meanwhile, firmly detect the welded wire harness and the welded terminal.

The invention provides a battery cell structure, an assembly process method of the battery cell structure and a large energy storage battery, the battery cell structure comprises a cover plate and two adapter sheet structures, the cover plate is provided with two pole columns arranged at intervals along the Y direction, each adapter sheet structure comprises a pole column connecting part, the pole column connecting part is provided with a first side, and the first side is provided with a second side; the first side is provided with a cleaning area for cleaning treatment, the cleaning area comprises a welding area and an annular area surrounding the periphery of the welding area, and the welding area is used for welding and fixing the pole connecting part and the pole, so that the welding area is ensured to be in a clean state before welding, welding defects caused by impurities, oxides and the like are avoided, and the welding quality is improved. Therefore, the welding strength and reliability of the pole connecting part and the pole are improved.

The invention discloses a laser welding method for a copper-aluminum composite material, which comprises the following steps of: performing upsetting thinning treatment on a three-layer sandwich structure base material to ensure that the total thickness of a welding area is 1.5 mm, the thickness of an aluminum layer is 0.9-1.1 mm (the deformation rate is 10-30%), the thickness of a copper layer is 0.2-0.3 mm, the surface roughness Ra is less than or equal to 1.6 mu m, and the surface roughness Ra of an oxide layer is less than or equal to 5 mu m; a 1064nm optical fiber laser is adopted, welding is conducted at the power of 85%-95%, the speed of 120-150 mm / s and the frequency of 4000-6000 Hz, the fusion depth is 0.3-0.6 mm, and the fusion width is 1.2-2.0 mm. By means of the method, the tensile strength of the connector can be larger than or equal to 110 MPa, the resistivity is smaller than or equal to 2.5 * 10 <-8 > omega.m, the problems that traditional welding strength is low and conductivity is poor are solved, batch quality consistency is ensured, and the method is suitable for the fields of new energy automobiles and the like.

The invention provides a bridge-cutoff aluminum door and window seamless welding platform, and belongs to the technical field of door and window seamless welding, the bridge-cutoff aluminum door and window seamless welding platform comprises a rack and a bearing plate, the bearing plate is fixedly connected with the rack, the top of the bearing plate is provided with a mounting table and a first gearbox, the mounting table is fixedly connected with the bearing plate, and a cross beam is arranged above the mounting table; the end of the cross beam is fixedly connected with a supporting plate, the side wall of the supporting plate is fixedly connected with a shell, and the grinding assembly is located on the inner side of the shell and used for removing impurities on the surface of base metal. The auxiliary assembly is located on the inner side of the shell, and the auxiliary assembly is used for treating residual impurity particles after grinding; and the transmission assembly is located on the inner side of the shell, and the transmission assembly is used for providing power for the grinding assembly and the auxiliary assembly. According to the method, the process of cleaning the position needing to be welded and the process of welding are achieved in one technological process, the welding seam strength and air cleanliness are guaranteed, and the working efficiency is also improved.

The invention provides a handheld laser welding gun capable of welding various materials, and belongs to the technical field of welding guns, the handheld laser welding gun comprises a welding gun main body and a bottom cover which are connected to form a mounting cavity, an irradiation assembly is arranged in the mounting cavity and comprises a main body shell and an irradiation pipe, a connecting plate is arranged at one end of the welding gun main body, and the welding gun main body is connected with the bottom cover; a rotating assembly is arranged on one side of the connecting plate, and the multiple sets of lasers are installed on the rotating assembly. A controller and a recognition assembly are arranged on the two sides of the welding gun body respectively, a handle is arranged at the top of the welding gun body, a control key is arranged at one end of the handle, and a power block is arranged at one end of the welding gun body and connected with an external power source through a power line. According to the welding gun, different materials can be recognized through the recognition assembly, the multiple sets of lasers with different wavelengths are installed on the rotating assembly, the proper lasers can be selected according to needs through rotation of the rotating assembly, welding defects caused by wavelength mismatching are effectively avoided, and the welding seam quality and the welding strength are improved.

The invention discloses a method for enhancing the laser transmission welding strength of thermoplastic plastics, and relates to the technical field of plastic laser welding, and the method for enhancing the laser transmission welding strength of the thermoplastic plastics comprises the following steps: firstly, degreasing and decontaminating an upper to-be-welded part and a lower to-be-welded part; then the degreased and decontaminated upper to-be-welded part and the degreased and decontaminated lower to-be-welded part are subjected to ultraviolet light activation treatment; then coating the surface of a lower part to be welded with a coating to construct a rigid-flexible interface layer, wherein the coating is a mixture formed by compounding oxidized carbon nanotubes, mussel adhesion protein and deionized water according to the mass ratio of (0.1-5): 10: 100; then the upper to-be-welded part and the lower to-be-welded part are stacked together, and laser transmission welding is conducted under inert gas protection; and after welding is completed, cooling and forming are conducted. When the rigid-flexible interface layer is constructed, through the synergistic effect of the oxidized carbon nanotubes and the mussel adhesion protein, the welding strength and oxidation resistance of the plastic weldment can be improved, and the service life of the weldment can be prolonged.

The invention relates to the technical field of batteries, in particular to a single battery and a battery pack. The battery cell provided by the embodiment of the invention comprises a shell, a first electrode terminal, a first electrode assembly and a first tab part, the shell is used for accommodating the first electrode assembly, and the shell is provided with a first wall; the first electrode terminal is arranged on the first wall; the first tab part comprises at least two first tab pieces, the first tab pieces extend out from at least one end of the first electrode assembly, and the first tab part is electrically connected with the first electrode terminal; a first welding mark and a second welding mark are arranged on the first tab part, the orthographic projection of the second welding mark falls into the orthographic projection of the first welding mark along the projection on the large surface of the first tab part, and the second welding mark is used for welding the first electrode terminal and the first tab part; wherein the roughness of the second welding mark is greater than that of the first welding mark. The technical effect of improving the welding strength between the tab and the electrode terminal is achieved.