90results about How to "Small heat affected zone" patented technology

The invention relates to the technical field of laser welding of micro-fluidic chips, in particular to a method and device for laser welding of a micro-fluidic chip. The method for laser welding of the micro-fluidic chip comprises the following steps: positioning the micro-fluidic chip, acquiring a local picture of the micro-fluidic chip through a visual detection module, controlling two end parts to automatically adjust positions on a space coordinate axis, and ensuring that a cover plate is tightly attached to the micro-fluidic chip; and the target heating light spot is aligned with the molten pool part, so that the matching degree of a real-time crystal phase image formed on the molten pool part and a target crystal phase image is larger than a set value, the welding procedure is completed in an automatic control and detection mode, and finally annealing is conducted to complete welding. The welding method is high in automation degree, laser welding is conducted through the laser welding head module, heating is fast, efficiency is high, and accurate and automatic welding is achieved by judging a crystal phase image.

The invention discloses a precision machining scanning lens for a femtosecond laser. The precision machining scanning lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged in the incident direction. Wherein the first lens is a concave-convex lens with a negative refractive index, the second lens is a concave-convex lens with a positive refractive index, the third lens is a convex-concave lens with a positive refractive index, the fourth lens is a concave-convex lens with a negative refractive index, the fifth lens is a biconvex lens with a positive refractive index, and the sixth lens is a biconcave lens with a negative refractive index. The seventh lens is a biconvex lens with a positive refractive index, and the eighth lens is a convex-concave lens with a negative refractive index. The precision machining lens used for the femtosecond laser can be matched with a D14 galvanometer, the focusing light spot is smaller than 3 microns, the machining efficiency is greatly improved, the focusing light spot is a round spot and cannot be ovalized, the heat affected area is small, and high-precision machining is achieved; the device can be used for processing various materials such as metal, glass and diamonds.

The invention relates to a composite material and metal connecting method based on metal surface femtosecond laser etching, and belongs to the technical field of composite material and metal plate interface and bonding. A metal interface is subjected to texturing treatment through femtosecond laser, a multi-stage microstructure is formed on the metal surface, then plasma treatment is used, the chemical energy and surface activity of the metal surface are improved, and the interlayer bonding strength of a metal plate and a composite material is further improved. Compared with a traditional bolt connection and glue joint of the same size, the connection mode can bear higher loads, energy absorbed before fracture is high, and the composite material has remarkable advantages in the aspects of bearing and weight reduction of a composite material structure and has potential application prospects.

The invention discloses a preparation method of an amphiphilic porous transmission layer, which comprises the following steps: 1) carrying out hydrophobization treatment on a titanium-based material to obtain a hydrophobic titanium-based material; (2) the hydrophobic titanium-based material obtained in the step (1) is subjected to laser regional burning treatment; and (3) carrying out hydrophilic treatment on the titanium-based material subjected to the cauterization treatment in the step (2) to obtain the amphiphilic porous transmission layer. According to the amphiphilic porous transmission layer provided by the invention, the amphiphilic porous transmission layer with a hydrophilic-hydrophobic alternating structure is constructed by combining a laser processing technology and a PTFE (Polytetrafluoroethylene) dipping hydrophobic modification technology, so that the split-diameter transmission of liquid water and oxygen in the titanium felt can be realized, the liquid water and the oxygen are efficiently discharged through a hydrophilic region and a hydrophobic region respectively, and the oxygen content in the titanium felt is reduced; and the mass transfer limitation of the electrolytic cell under high current density operation is greatly reduced, and the long-term operation life of the electrolytic cell is prolonged.

The invention provides a laser de-bonding method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a de-bonding area on a semiconductor substrate to be de-bonded; wherein the de-bonding area is made of an inorganic material; selecting laser parameters of a pulse laser; wherein the pulse laser comprises any one of a nanosecond laser, a picosecond laser and a femtosecond laser, and the laser parameters comprise laser wavelength and laser pulse width and frequency; and controlling the pulse laser to irradiate the de-bonding area according to the laser parameters. According to the laser de-bonding method, a nanosecond laser, a picosecond laser or a femtosecond laser is adopted to irradiate a de-bonding area on a to-be-de-bonded device, so that de-bonding treatment is carried out on the de-bonding area, and the de-bonding efficiency of taking an inorganic material as a to-be-de-bonded material is improved.

The invention relates to the field of laser cutting equipment, and discloses a laser cutting workbench for sheet metal working, which comprises a cutting platform provided with a cutting table; the thorn plates are arranged on the cutting table and used for increasing the friction force between the metal plate and the cutting table; the moving frame is arranged on the cutting table, and a plurality of conveying shafts are arranged on the moving frame; the laser cutting head is arranged on the cutting platform; the box body is arranged in the cutting platform, and the position of the box body is lower than that of the thorn plate and the moving frame; according to the laser cutting device, the design of traditional laser cutting equipment is improved, the box body and the liquid cooling system are additionally arranged, the problems of sparks and molten metal diffusion in the laser cutting process are solved, and the cutting quality and the safety of the working environment are remarkably improved.

The invention discloses a short pulse laser assisted continuous laser welding device and method. The method comprises the steps that materials are laid; a welding area is divided, and the whole welding area is divided into small areas; performing feature extraction on the small regions; constructing a speed mapping table according to the extracted different features; and planning a laser scanning path according to the speed mapping table. The short-pulse laser-assisted continuous laser welding device and method have the beneficial effects that near-infrared wavelength laser (such as 1064nm) is selected in the whole welding process, and the characteristics of high reflectivity of titanium alloy to the wavelength, high absorptivity of thermoplastic resin, relatively low absorptivity of a resin part in a thermosetting composite material and poor absorptivity of carbon fibers to the wavelength are utilized; laser energy is mainly concentrated on the thermoplastic resin layer, and local heating is achieved. The method comprises the following steps: dividing a region into small regions, extracting features, constructing a speed mapping table, controlling laser energy input, and reducing heat affected zones of the titanium alloy and the thermosetting composite material.

The invention provides a preparation method of a conductive corrosion-resistant modified layer of a stainless steel bipolar plate of a PEM water electrolyser. The preparation method specifically comprises the following steps: step 1, carrying out dry sand blasting treatment on the surface of a to-be-prepared coating of a 316L stainless steel bipolar plate base material by using a pressurized sand blasting machine; step 2, carrying out ultrasonic cleaning on the to-be-prepared coating surface of the 316L stainless steel bipolar plate base material subjected to sand blasting, and drying for later use; and 3, the dried 316L stainless steel bipolar plate base material is loaded on a welding tool platform, FeCoNiCrAl high-entropy alloy powder is put into a powder feeder, and the high-entropy alloy laser cladding coating is prepared on the surface, to be prepared, of the 316L stainless steel bipolar plate base material through a laser cladding technology. According to the technical scheme, the problems that in the prior art, the cost is high, the preparation technology is complex, and the coating thickness is small are solved.

The invention relates to a method for preparing a heterostructure magnesium alloy based on low-temperature friction stir additive in the field of metal processing, and designs a high-quality and high-efficiency cooling tool, which mainly comprises the following steps: firstly, cooling alcohol to low temperature by using liquid nitrogen; then the magnesium alloy plate to be machined is fixed to a cooling tool in a lap joint mode, and the tool mainly comprises a device body (1), a cooling liquid inflow hole (2), a cooling liquid outflow hole (3), a workpiece containing groove (4), a liquid storage chamber (5), a pressing plate (6) and fastening screws (7); then low-temperature alcohol is introduced, an advancing path and technological parameters are set, first-layer stirring friction additive manufacturing is conducted, and in the machining process, a stirring head and a workpiece are always kept to be submerged in cooling liquid; then, the surface obtained after material adding is milled to be flat, a layer of plate is overlaid on the other unmachined surface again, and the plate is fixed into the workpiece containing groove; and finally, second-layer friction stir additive manufacturing is conducted on the other face of the plate according to the same parameters and the same path. The method can be suitable for additive manufacturing of low-melting-point metal such as magnesium alloy and aluminum alloy at the same time, the multi-scale gradient heterostructure magnesium alloy can be prepared at the same time, the preparation efficiency is improved, and high-quality and low-cost preparation of heterostructure materials is achieved.

The invention discloses a zirconium-nickel dissimilar metal welding method based on active regulation and control of a temperature field. The zirconium-nickel dissimilar metal welding method comprises the following steps that S1, base metal is cleaned; the butt-joint end faces and the welding surfaces of the zirconium and nickel alloy pipes are polished and cleaned, and clean zirconium and nickel base materials are obtained; s2, a to-be-welded part is assembled; the to-be-welded end face of the clean base metal is assembled in a protective gas cavity of the rotary clamping device; s3, welding is conducted; a laser scanner is adopted for welding at a preset welding position, heat source gradient distribution of base metal at the two ends of a welding seam is controlled by regulating and controlling laser power, welding seam temperature field feedback is established through an infrared temperature sensor, and real-time monitoring and laser power regulating and controlling are conducted; s4, postweld heat treatment; and the laser power is adjusted in real time according to welding seam temperature field feedback so as to adjust and control the welding seam cooling process. According to the method, effective connection of zirconium-nickel indissolvable metal is achieved by controlling the regional welding temperature field, the temperature range for forming brittle compounds is avoided, the uniformity of a molten pool between Zr and Ni materials is ensured, and welding defects such as hot cracks and air holes are reduced.

The invention provides a liquid cooling plate welding process control method, a liquid cooling plate structure and a battery pack, and the liquid cooling plate welding process control method accurately identifies a welding position by receiving position information sent by monitoring equipment, and writes a laser wire filling welding moving path, so that accurate welding of a complex structure of a liquid cooling plate is realized, and the welding quality of the liquid cooling plate is improved. The welding precision and efficiency are improved, the automation degree is high, the welding area is small, the limitation of a traditional welding method during large gap treatment is overcome, and the welding speed and quality are greatly improved. According to the liquid cooling plate structure and the battery pack, the point where the cooling liquid is easy to leak is located outside the battery box, so that the influence of leakage of the cooling liquid on the battery box is avoided. The liquid cooling plate structure is arranged on the battery box, and the battery box is fixed on the mounting space of the liquid cooling plate structure, so that the mounting points of the liquid cooling plate structure and the battery box do not occupy the internal space of the battery box, more storage space is provided for the battery module, and the total capacity of the battery pack is directly improved.

The invention relates to the field of laser cutting equipment, and discloses a laser cutting workbench for sheet metal processing, comprising: a cutting platform, on which a cutting table is arranged; a plurality of thorn plates arranged on the cutting table, for increasing the friction between the sheet metal plate and the cutting table; a moving frame arranged on the cutting table, on which a plurality of conveying shafts are arranged; a laser cutting head arranged on the cutting platform; a box body arranged in the cutting platform, the position of the box body being lower than the thorn plates and the moving frame; the invention improves the design of traditional laser cutting equipment, adds a box body and a liquid cooling system, solves the problem of spark and molten metal diffusion in the laser cutting process, and significantly improves the cutting quality and the safety of the working environment.

The invention discloses a stainless steel rod bundle cutting device, which relates to the technical field of stainless steel cutting, and comprises a first conveying assembly, a laser cutting assembly and a storage assembly, the first conveying assembly is provided with a bearing face and can convey rod bundles on the bearing face in the first direction. The laser cutting assembly is arranged on one side of the first conveying assembly in the first direction, the first conveying assembly can continuously convey the rod bundles in the first direction, and the laser cutting assembly can cut the rod bundles into the rod bundles with the specified length through laser; the storage assembly is arranged on one side of the first conveying assembly in the first direction, and the rod bundles with the specified length can fall into the storage assembly and are stored through the storage assembly. According to the stainless steel rod bundle cutting device, automatic operation is improved, the labor cost is reduced, and the production efficiency is improved. The invention further provides a stainless steel rod bundle cutting method.

The invention discloses a gas-liquid composite auxiliary device for laser processing, and belongs to the technical field of material processing, the gas-liquid composite auxiliary device for laser processing comprises a liquid jet module, the liquid jet module comprises a liquid storage shell, one end of the liquid storage shell is provided with a liquid guide pipe, the other end of the liquid storage shell is used for being connected with a laser processing head, and laser emitted by the laser processing head acts on the surface of a workpiece through the liquid guide pipe; the liquid storage shell is communicated with a liquid inlet assembly; and the gas jet module comprises a gas outlet pipe, the gas outlet pipe and the liquid guide pipe are coaxially arranged, the liquid guide pipe is sleeved with the gas outlet pipe, a gap is formed between the gas outlet pipe and the liquid guide pipe, and the gas outlet pipe communicates with a gas inlet assembly. The composite mode of combining gas and liquid is adopted, slag generated by laser processing can be efficiently cleaned, cleanliness of a processing area is guaranteed, the cooling effect can be further improved, heat affected zones generated by laser processing are reduced, and therefore the influence of laser processing on the overall performance of materials is reduced.

The invention relates to a preparation method of a titanium alloy coating on the surface of a steel base material. The preparation method comprises the following steps: preparing titanium alloy powder; the method comprises the following steps: pretreating a steel base material, and preheating in advance; uniformly coating the tin bronze powder on the surface of the steel base material by using a binder; under argon protection, a copper transition layer is prepared on the surface of a steel base material in a laser cladding mode, and then the surface of a cladding layer is polished to be flat in a machining mode; uniformly coating titanium alloy powder on the surface of the material treated in the step d by using a binder; under argon protection, a titanium alloy coating is prepared on the surface of the steel base material through a laser cladding method; and the surface of the cladding layer is polished to be flat in a machining mode, and preparation of the titanium alloy coating is completed. The titanium alloy coating obtained through the method is fully fused with a base body, defects are avoided, the surface quality of a cladding layer is flat, and the titanium alloy coating has the characteristic of excellent corrosion resistance, can resist salt mist for 3000 h and further has excellent wear resistance.

The invention relates to a method and device for cutting a silicon wafer underwater through green wavelength laser. The method comprises the steps that the silicon wafer to be machined is fixed in a container containing liquid; an optical path distance for underwater laser cutting exists between the silicon wafer to be processed and the glass at the bottom of the container cover; enabling the liquid in the container to flow and keep stable, and focusing the laser on the surface of the silicon wafer through glass at the bottom of the container cover and the liquid above the silicon wafer; and the laser moves according to a preset path and completes cutting, and chippings generated by cutting are removed through flowing liquid. According to the method and device for underwater cutting of the silicon wafer through the green wavelength laser, by adopting a non-contact machining means, physical pressure on the wafer is reduced, the requirements of the semiconductor industry for a high-precision and low-damage cutting process can be met, meanwhile, flowing liquid can remove chippings generated by cutting, and the cutting efficiency is improved. And the situation that dust and chippings generated in the cutting process pollute the surrounding environment can be effectively prevented.

The invention discloses a capacitor lifting piece robot cooperative welding system and method. The system comprises an automatic box shell carrying robot, an automatic lifting piece welding device, an automatic box shell positioning and overturning device and an automatic lifting piece feeding device. The automatic box shell carrying robot is used for carrying capacitor box shells to the automatic box shell positioning and overturning device from the box shell feeding position. The automatic lifting piece feeding device is used for clamping lifting pieces, carrying the lifting pieces to the welding position and pressing the lifting pieces and the capacitor box shell. The lifting piece automatic welding device is used for welding the lifting piece and the capacitor box shell; and the automatic box shell positioning and overturning device is used for clamping, positioning and welding the capacitor box shell and overturning the capacitor box shell of which one side is welded for welding the other side.

The invention discloses a water jet assisted millisecond laser-femtosecond laser secondary composite hole making method. The method comprises the steps that S1, an iron-based high-temperature alloy material is pretreated; s2, preliminarily processing the iron-based high-temperature alloy material through millisecond laser assisted by water jet, and punching for the first time; s3, the transferred iron-based high-temperature alloy material is subjected to finish machining under femtosecond laser, and second-time punching is conducted in combination with ultrasonic vibration; and S4, after punching is completed, the iron-based high-temperature alloy material is cooled, and the quality and precision of machined holes are checked. According to the method, water jet is used for assisting millisecond laser to conduct preliminary punching, heat affected zones are reduced, a good hole shape foundation is laid, fine machining is conducted in combination with ultrasonic vibration assisted femtosecond laser, the roundness and surface quality of holes are further improved, and the machining precision is improved. The problems of poor hole roundness and low machining precision caused by high thermal conductivity of the iron-based high-temperature alloy in femtosecond laser drilling are effectively solved, and the machining quality and precision are remarkably improved.

The application discloses an ultra-long thin steel strip high-speed laser wire filling welding and on-line intelligent detection device and detection method, and belongs to the field of laser welding equipment. The device solves the problems of low weld seam tracking precision, unstable penetration, difficult defect early warning, non-closed loop quality verification, and non-traceable data of the ultra-long thin steel strip. A double-beam laser wire filling welding unit adopts a front high-power laser to realize high-speed deep penetration, and a rear swing laser to melt the welding wire and stir the molten pool. The two lasers work together in the molten pool. An on-line intelligent detection unit of the molten pool synchronously collects the crater shape, the molten pool appearance and the temperature field through a high-speed camera and an infrared thermal imaging system. A deep learning control unit establishes a defect correlation model based on the characteristics of the molten pool, and marks the suspected defect position in real time. An X-ray verification unit after welding automatically scans and verifies the marked area. The application realizes the high-speed, low-deformation and high-reliability continuous automatic welding production of the ultra-long thin steel strip with a length of greater than or equal to 50 m and a thickness of 1-6 mm.

A kind of metal pipe fitting electromagnetic forming device and method based on laser heating, with positioning system including positioner, first guide rail, first numerical control moving platform, for accurately positioning metal pipe fitting and mold coordinates;Conveying system includes second guide rail, numerical control moving platform, motor, for realizing the rotation and movement of metal pipe fitting;Heating system includes laser heating device, temperature detector;Electromagnetic forming system includes spiral tube coil, mold, capacitor, DC power supply and control switch;Its characterized in that, motor, fixture, metal pipe fitting, mold, spiral tube coil are horizontally distributed on the same axis, metal pipe fitting can be rotated with the help of motor, and can be moved in the gap between spiral tube coil and mold with the aid of conveying system.The present application can realize uniform heating when metal pipe fitting electromagnetic warm forming, greatly improve heating efficiency, reduce heat affected zone, and improve the position accuracy of metal pipe fitting local microstructure electromagnetic forming.

The present application relates to battery terminal component manufacturing technology field, especially relates to a kind of welding line and welding method of full-automatic wiring terminal, including vibration arrangement mechanism, transfer mechanism, rotary disc fixture mechanism and welding mechanism, utilize the mutual cooperation of vibration arrangement mechanism, transfer mechanism, rotary disc fixture mechanism and welding mechanism, with vibration arrangement feeding, transfer transplant, rotary intermittent indexing clamping, mid-frequency induction heating, automatic wire feeding fusion welding, automatic unloading and discharging each process integration, replace traditional manual sorting, single positioning, manual welding, manual unloading operation mode, realize wiring terminal from messy bulk to finished product welding complete full-process unmanned automation operation, production line coherence is strong, process link is closely, substantially reduce manual intervention.

The utility model discloses a motor iron core laser welding machine with an automatic flexible correcting device, which comprises a machine frame, a rotary welding base is arranged on the machine frame, a plurality of iron core welding placing assemblies are uniformly arranged on the rotary welding base, and the iron core welding placing assemblies are arranged on the machine frame. According to the iron core welding and placing assembly, a telescopic shaft is arranged on a rotary welding base in a penetrating mode through a sleeve shaft, a butt joint disc is fixedly arranged at one end of the telescopic shaft, a buffer spring is arranged between the butt joint disc and the sleeve shaft, a motor iron core placing frame is arranged at the upper end of the butt joint disc, and an air expansion shaft is arranged in the middle of the interior of the motor iron core placing frame. The objective condition of batch and efficient welding of motor stator iron cores is achieved, the device is designed to be in a multi-station mode, and the problem that original production capacity is low is solved in an automatic rotating mode in the online pressurizing and pressing state. The rotary welding base is provided with a buffer spring, so that the damage caused by the pressure on the base is ensured in a pressure maintaining state.

The invention belongs to the related field of two-section type liquid capsule filling and sealing technologies, and discloses a two-section type liquid capsule filling and sealing system which comprises a liquid filling unit and a sealing unit. The liquid filling unit comprises a filling main machine, a feeding module, a separating module, a smearing module, a liquid injection module, a capsule combining module and a capsule discharging module, wherein the feeding module, the separating module, the smearing module, the liquid injection module, the capsule combining module and the capsule discharging module are arranged on a working table face of the filling main machine. Capsules are sequentially transferred to the filling stations, and the liquid filling process is completed. The sealing unit comprises a sealing main machine, a feeding module, a laser welding module, a sealing discharging module and a discharging module, wherein the feeding module, the laser welding module, the sealing discharging module and the discharging module are arranged on a working table face of the sealing main machine. Capsules are sequentially transferred to the sealing stations, and the sealing process in an annular laser welding mode is completed. The invention further discloses a corresponding method. According to the invention, not only is the capsule sealing quality improved, but also the sequence transfer action of the capsule is reduced in the production transfer process, and finally, the qualified rate of liquid capsule finished products and the system efficiency are greatly improved.

The invention relates to a manufacturing method of a split flexible gear, which is applied to the field of welding and comprises the following steps: respectively manufacturing a cup body and a flange plate; putting the cup body and the flange plate into cleaning equipment, and performing surface treatment on the cup body and the flange plate; the cup body is assembled on the flange plate to form a workpiece; a brazing filler metal and a stop-off agent are placed on the lap joint face between the cup body and the flange plate; the whole workpiece is put into a vacuum brazing furnace, and a vacuum system is started to vacuumize the interior of the vacuum brazing furnace; and the temperature in the vacuum brazing furnace is increased to the target brazing temperature. The mode of integrally machining the flexible gear through a complex deep-cavity thin-wall part in the prior art is optimized and decomposed into two relatively simple parts to be welded and machined, the production process is optimized and shortened while raw materials are saved, a heat affected zone can be greatly reduced through vacuum brazing, and the production quality and the production efficiency of the flexible gear are improved.

The invention discloses a cylinder rotating multi-path laser beam machining method, and relates to the technical field of cylinder surface machining. The processing method comprises the following steps: S1, adjusting a light path of a laser; s2, light is emitted through a laser, dotting or routing is conducted on the surface of the polyurethane cylinder, and the laser is driven by a marking control system to shift; s3, a laser is moved to the focus position of the polyurethane cylinder, the laser emits light to conduct marking and grooving, the polyurethane cylinder rotates by a circle at the same time, and when the marking and grooving line width of the laser is the same as the rotation line width of the polyurethane cylinder, adjustment of the light path position of the laser is completed; and S4, parameters of the marking control system are adjusted, the laser device reaches the machining slotting position, the laser device emits light, and the polyurethane cylinder is machined. According to the cylinder rotating multi-path laser beam machining method, polyurethane cylinders are machined through laser, the limited production cost change is achieved, the production efficiency is remarkably improved, and the production cost is reduced.

This invention relates to an electron beam welding method for ZL114A / ZL270 dissimilar aluminum alloy materials, belonging to the field of electron beam welding technology. It addresses one of the problems encountered in existing electron beam welding methods for ZL114A / ZL270, namely, the presence of obvious cracks, incomplete fusion, and excessive internal porosity within the weld seam. The electron beam welding method of this invention includes: tack welding of assembled ZL114A and ZL270 alloy test plates; welding using a dual electron beam synchronous welding method with one electron beam preheating the weld seam first, followed by the other electron beam for the final welding; during the final welding process, the center of the electron beam spot is shifted from the butt joint of the test plates towards the ZL270 alloy plate side.

The invention relates to the technical field of temperature and pressure monitoring cable splicing, and provides an SAGD lifting operation temperature and pressure monitoring cable rapid splicing cold welding method which comprises the following steps: S1, preparation work; s2, point solidification is carried out; s3, welding is conducted; s4, post-welding treatment is carried out; s5, a welding seam is inspected; according to the method, a stable and uniform welding foundation can be provided for subsequent argon tungsten-arc welding filling and capping through cold welding bottoming, and the overall welding quality can be improved; argon tungsten-arc welding which has the advantages of being concentrated in heat, narrow in weldment heat affected zone, small in welding deformation and high in welding quality is selected for seam filling so as to ensure the sealing performance, and then argon tungsten-arc welding is used for covering so as to ensure the attractiveness and the protection effect of welding seams; the method is suitable for high-temperature underground operation of SAGD, fireflooding, electric heating wells and the like due to simple and convenient operation and good sealing performance and corrosion resistance, and the use requirements in different environments are met.

The utility model relates to a kind of differential and vehicle, its shell is fixedly connected by welding with main reduction gear, shell is constituted by two half shells and is respectively installed in the axial both sides end surface of main reduction gear. Fixed part for and half shell welding is equipped on the axial both sides end surface of main reduction gear, and positioning part spaced apart from fixed part welding area in radial direction is also equipped, and positioning part supports half shell when welding. The technical scheme will positioning part and welding area be spaced apart, avoid the influence of positioning accuracy by heat distortion generated in welding process, can effectively improve the assembly accuracy and overall performance of differential, ensure the reliable operation of differential.

The invention relates to the field of sheet metal components, and discloses a sheet metal component hemming butt joint welding joint process method which comprises a flat plate component and a hemming component, the flat plate component is in butt joint with the hemming component, and the end of the flat plate component extends to be in direct contact with a bent R angle of the hemming component; a unilateral V-shaped welding structure is formed at the butt joint and is suitable for reducing welding gaps and preventing deformation in the welding process; the hemming component is connected with the flat plate component in a welding mode, the thickness of a welding seam is close to the thickness of base metal so that the structural stability of a welding joint can be guaranteed, and the angle of the single-side V-shaped structure is determined by the butt joint mode of the flat plate component and the hemming component. By optimizing the flat plate extension design and adopting the friction stir welding technology and the real-time monitoring system, the welding seam strength and uniformity are improved, the heat influence and deformation are reduced, the accurate control of the welding process is ensured, and the welding quality consistency and the joint stability are improved.

The full-laser welding bulging long plate heat exchanger for the high-salt dust working condition comprises a heat exchanger body, and the heat exchanger body comprises fixed supporting plate ground feet, fixed supporting plates, fastening semicircular groove holes, tail supporting stand columns, tail supporting beams, supporting top beams, guide rail beams and supporting rods; the tail supporting stand columns are fixedly arranged on the fixed supporting plate ground feet, the multiple sets of fixed supporting plate ground feet are arranged, the fixed supporting plate is fixedly arranged on the multiple sets of fixed supporting plate ground feet, multiple sets of fastening semicircular groove holes are formed in the two sides of the upper edge of the fixed supporting plate, the tail supporting beams are fixedly arranged on the tail supporting stand columns, and the two sets of guide rail beams are oppositely arranged up and down. According to the heat exchanger, the pressure resistance of the heat exchanger can be effectively improved, in a high-salt flue gas environment, leakage caused by corrosion of the sealing ring is reduced, the welding compactness is improved, blockage caused by high-salt dust residues is reduced, the cleaning difficulty is reduced, the dismounting and cleaning difficulty is reduced, and the labor intensity is reduced.