36results about How to "Simple welding process" patented technology

The invention discloses a vision-based weld defect detection method and system, and relates to the technical field of weld defect detection, and the method comprises the steps: adjusting welding parameters when scene environment data in a welding region is monitored and obtained to be inconsistent with expectation; after heat distribution data of the welding part is collected, a distribution abnormal value is generated, whether the distribution abnormal value exceeds the expectation or not is judged, if yes, welding defects of the welding part are predicted, and welding process parameters are optimized according to predicted data; after surface defect data of the welding part are recognized and obtained, internal defects of the welding part are detected, and simulation test data are obtained after the performance of the welding part is tested; and taking the surface defect data, the internal defect data and the simulation test data as feedback, and giving a corresponding process optimization scheme through the welding process optimization knowledge graph. The current welding defect is subjected to preliminary defect detection, the detection result can be quickly obtained, and whether the welding position has the welding defect at present or not is verified.

The invention discloses a butt weld welding process for a narrow space of a compact fusion reactor. The butt weld welding process comprises the following steps: (1) performing groove processing on a welding part of a workpiece and a rhombic compensation block; (2) the workpieces are relatively fixed, a rhombic compensation block is placed at the welding position, the welding seam gap between the rhombic compensation block and the adjacent workpiece is 0-4 mm, and the alignment tolerance of the two workpieces is 0-15 mm; (3) positioning and welding are carried out at the midpoints of the transverse welding seam and the longitudinal welding seam of the rhombic compensation block; (4) backing welding of transverse welding seams and longitudinal welding seams is conducted in an alternate stacking mode; (5) filling welding of transverse welding seams and longitudinal welding seams is conducted in an alternate stacking mode; the diamond compensation block is used for connecting the two workpieces in butt joint, the Y-shaped welding seam is formed through the machined groove, the compensation angle is achieved, the swing welding space and the welding view of manual welding in a narrow space are enlarged to a great extent, the operation difficulty and the labor intensity are reduced, and the welding seam quality is improved.

The invention relates to a cylindrical battery top cover assembly and an assembling method thereof, and a battery cell comprising the top cover assembly. The top cover assembly comprises a T-shaped pole terminal, an upper plastic part, a top cover sheet, an inclined plane sealing ring, a lower plastic part, a compression ring and a confluence disc, the disc part provides a wide welding surface, the cylinder is used for connecting the compression ring and the confluence disc, and the welding reliability and stability are enhanced. And the compression ring and the confluence plate are sleeved on the cylinder of the pole terminal and are firmly connected with the pole terminal in a laser welding manner. The design of the inclined plane sealing ring enables the sealing ring to distribute stress more uniformly when the sealing ring is stressed, sealing failure is avoided, the assembly method comprises the steps of stacking the assemblies, applying pressure to the confluence plate to compress the sealing ring, and welding the compression ring, the confluence plate and the pole terminal in the state that the sealing ring is compressed, so that efficient and stable connection among the assemblies is realized, and the assembly efficiency is improved. Therefore, the sealing performance, the electrical connection reliability and the long-term stability of the battery are improved.

The invention relates to a steel-UHPC combined bridge deck based on combined tenon connecting pieces and a construction method of the steel-UHPC combined bridge deck. The steel-UHPC combined bridge deck comprises a steel bridge deck slab, a steel tenon plate, a reinforcing mesh and a UHPC thin layer. The steel tenon plate is vertically fixed to the top face of the steel bridge deck, and the top of the steel tenon plate is provided with a tenon-shaped unit protruding upwards. The steel bridge deck slab is covered with the reinforcing mesh, and the tenon-shaped units are inserted into grids of the reinforcing mesh and fixed to the grids. UHPC concrete is poured on the steel bridge deck, the steel tenon plate and the reinforcing mesh to form a UHPC thin layer. The novel combined tenon connecting piece is applied, the limiting requirement of a UHPC thin layer on the height of the connecting piece can be met, the shearing resistance, the pulling resistance and the rigidity are higher, the number of the connecting pieces is small, the number of single pieces is small, the number of welding spots is small, the deformability in the UHPC is higher, it is ensured that the steel bridge deck and the UHPC are tightly combined, and the long-term use performance is better.

This application relates to a battery pack side beam structure, a battery box, and electrical equipment, belonging to the field of power battery technology. The battery pack side beam structure is connected to the top cover plate of the battery pack. The battery pack side beam structure includes a box beam body and a connecting plate. The box beam body includes an inner beam plate and an outer beam plate, which are connected and fixed together. The connecting plate is connected to one end of the box beam body near the top cover plate and extends away from the inner beam plate. The connecting plate has riveting holes. The outer beam plate is inclined towards the end of the connecting plate and has an inclined plate forming towards the inner beam plate. The inclined plate, the inner beam plate, and the connecting plate together enclose a connecting cavity with an opening on one side. The battery pack side beam structure provided by this application can solve the problems of high cost and easily affected sealing effect at the connection position between the side beam and the top cover in the battery pack box body in the prior art.

The system comprises a safety protection system, the safety protection system comprises a safety fence, an electrical cabinet, a digital welding machine, a robot control cabinet, a welding robot, a two-axis positioner and a tool clamp are installed in the safety fence, a visual monitor is arranged on the safety fence, and a control cabinet and a monitoring displayer are arranged outside the safety fence. An industrial personal computer is installed in the control cabinet, an operation displayer is arranged on the industrial personal computer, and a code scanning gun is installed on the control cabinet. A PLC is installed in the electrical cabinet, an expert process library is loaded in the PLC, a pipeline used for conveying protective gas is connected to the digital welding machine, a tool clamp is arranged on the two-shaft positioner, a magnetic attraction clamp used for clamping an aluminum alloy guide pipe is arranged at one end of the tool clamp, and a connector ring used for clamping a pipe connector is arranged at the other end of the tool clamp. The welding process technological parameters of each aluminum alloy guide pipe can be solidified, it is ensured that the welding parameters in the welding process are consistent, and the one-time welding qualification rate is effectively increased.

The invention provides a 500MPa-grade low-slag gas shielded solid welding wire for the automobile industry. The welding wire comprises the following chemical components in percentage by weight: 0.11-0.16% of C, 0.12-0.12% of S, 0.12-0.12% of Cr, 0.12-0.12% of Cr, 0.12-0.12% of 0.50% to 0.70% of Si; mn: 1.00 to 1.35%; plt; 0.015% of the total weight; the content of S is 0.005 to 0.015 percent, and the content of Cr + Ni + Mult; 0.15% by weight; 0.20% or less of Cu; the sum of the mass fractions of all the components is 100%, and the content of the Cu element comprises a welding wire copper plating layer. The welding wire is small in welding spatter, good in electric arc stability and all-position operability, basically free of slag and free of cleaning after welding, attractive in weld joint forming, excellent in welding process performance and excellent in weld joint metal mechanical performance.

The utility model provides a kind of shell-plate fin heat exchanger, comprising: shell, the shell is cylindrical and the inside is limited with heat exchange cavity, and at the opposite ends in the axial direction of shell is respectively provided with air inlet and air outlet with heat exchange cavity communication;And heat exchange core, the heat exchange core is arranged in the heat exchange cavity of shell, and at the opposite ends of heat exchange core is respectively provided with heat storage medium inlet and heat storage medium outlet, especially, the heat exchange core is plate fin heat exchange core, including alternately arranged multiple air fins and multiple heat storage medium fins and multiple partitions, wherein, air in air fin channel and heat storage medium in heat storage medium fin channel flow along different direction.The shell-plate fin heat exchanger has the advantages of good pressure-bearing capacity of shell-and-tube heat exchanger and high efficiency, compact structure of plate fin heat exchanger, and simplifies welding process, reduces equipment weight.

The utility model relates to the technical field of tin soldering equipment, in particular to vertical ultrasonic tin soldering equipment which comprises an ultrasonic transmitting head, an ultrasonic amplitude-change pole, an ultrasonic transducer and a tin furnace, ultrasonic vibration generated by the ultrasonic transducer is conducted to the ultrasonic amplitude-change pole, then the ultrasonic vibration is conducted to the ultrasonic transmitting head through the ultrasonic amplitude-change pole, and the tin furnace is connected with the ultrasonic transmitting head through the ultrasonic amplitude-change pole. And the ultrasonic transmitting head is positioned in the tin furnace and is in direct contact with the tin liquid, so that the tin liquid generates a cavitation effect. According to the vertical ultrasonic tin soldering equipment, scaling powder is not used in the whole process, generation of harmful gas and waste water pollution are avoided, the vertical ultrasonic tin soldering equipment is environmentally friendly, tiny air holes and air holes cannot be generated in the welding process due to the fact that the scaling powder is not used, the welding quality is higher, the welding process is simplified, the production efficiency is improved, and the production cost is reduced.

The invention discloses a welding method of a titanium-steel bimetal composite structure and application of the welding method, and relates to the technical field of welding. The titanium-steel bimetal composite structure comprises a steel layer and a titanium layer, according to the welding method, the stepped U-shaped groove is designed in the steel layer, the titanium layer at the bottom is completely exposed, and contact between titanium and steel is completely isolated while full fusion of a welding seam is achieved; and besides, the U-shaped groove of the to-be-welded part is welded in a butt joint mode, mutual fusion between layers is effectively prevented through the reasonable and feasible welding sequence and the optimized welding technology, and therefore formation of Fe-Ti compounds between brittle metal is restrained, and the strength of the titanium steel composite structure connector is improved. The titanium-steel double-metal composite structure manufactured through the welding method is expected to be popularized and applied in the fields of marine equipment and petroleum.

The invention relates to a light emitting balance design method of a double-sided light emitting LED light source module in the technical field of intelligent manufacturing, and the method comprises the steps: adjusting the parameters of an optical processing structure in a substrate according to the intensity distribution of light emitted from the front surface, and obtaining the initial uniform data of the light distribution of the back surface; acquiring a scattering point coordinate set from the back light distribution preliminary uniform data, and determining a scattering angle adjustment value for uniform scattering optical properties of a substrate material to balance light intensity gradient distribution; heat conduction related parameters are extracted from the overall double-face light emitting equilibrium design model, heat flow distribution is simulated according to the heat dissipation thermal attribute of the light emitting diode chip, and welding process optimization points are determined; and according to the welding process optimization points, generating a module design blueprint, verifying the light emitting efficiency of the double-sided light emitting balance design model, and if an efficiency improvement index meets a preset threshold value, outputting complete solution data.

The FPC flat cable comprises a cable body, a first bonding pad, a second bonding pad, a third bonding pad and a fourth bonding pad, the cable body comprises a main body part, a base body part and an extension part, a first circuit structure is arranged in the cable body, the outside of the cable body is connected with a second circuit structure, and the extension part can be bent relative to the base body part. The first bonding pad is vertical to the second bonding pad; part of the base body part can be bent relative to the main body part, so that the third bonding pad and the fourth bonding pad face the same direction. According to the FPC flat cable, the cable with the low shielding requirement is arranged inside, the cable with the high shielding requirement is arranged outside for welding, the first circuit structure is used for supplying power to a camera and an LED device at the head end of an endoscope, the second circuit structure is used for transmitting clock signals, a data annunciator and the like, the cables are distinguished according to the shielding requirement, and the shielding requirement is met. And shielding setting is facilitated. The camera module and the endoscope which are connected by adopting the FPC flat cable also have the above advantages.

The invention provides a stainless steel pipe welder capable of preventing weld joint oxidation, and relates to the technical field of welding equipment, the stainless steel pipe welder comprises a welding assembly, a cover body part, a trailing part and a gas supply assembly, the trailing part comprises a lower groove part, a refrigeration sheet and an upper groove part, the opening of the lower groove part faces a stainless steel pipe workpiece, and a first channel is formed between the lower groove part and the workpiece; the upper groove piece is fixedly connected to the side, away from the workpiece, of the lower groove piece, and a second channel is formed. The refrigeration sheet is clamped between the lower groove piece and the upper groove piece, the cold end faces the lower groove piece, and the hot end faces the upper groove piece; when protective gas in the cover body part flows to the trailing part, first protective gas and second protective gas are formed, and the first protective gas flows through the first channel, exchanges heat with the cold end of the refrigeration sheet and then is cooled, so that the dual functions of protection and cooling are realized; and the second protective gas flows through the second channel, exchanges heat with the hot end of the refrigeration sheet, and drives the outside air to perform forced heat dissipation on the hot end by utilizing the gas disturbance effect.

This invention discloses a decoupled method for measuring deformation during glass-metal welding. The method includes the following steps: S1: pretreatment of the material to be welded; S2: coating the glass surface; S3: fixing the material to be welded; S4: installing and debugging the measuring instrument; S5: establishing a spatial coordinate system; S6: acquiring positional features before welding; S7: ultrafast laser welding of the glass and metal base; S8: analyzing and calculating displacement characteristics during the welding process; S9: analyzing and calculating angular characteristics during the welding process; S10: analyzing and calculating the deformation of the glass and metal during welding. This invention provides a decoupled method for measuring deformation during glass-metal welding, employing an in-situ deformation measurement device with a single camera and a single autocollimator. Simultaneously with ultrafast laser welding of the glass and metal, the deformation of the glass is monitored and measured in real time. A dual-feature-point method is used to decouple the displacement of the glass during the welding process, obtaining the displacement of the glass in five degrees of freedom during welding.

The invention relates to a glass and metal welding device and method.The welding device comprises a magnetic clamping piece, a glass to-be-welded piece, a metal to-be-welded piece, a supporting table and a laser device, and the glass to-be-welded piece is attached to the metal to-be-welded piece; the magnetic clamping pieces are clamped on the two sides of the glass to-be-welded piece and the two sides of the metal to-be-welded piece to form a to-be-welded assembly, the to-be-welded assembly is placed on the supporting table, and laser beams generated by the laser device are focused on the contact interface of the glass to-be-welded piece and the metal to-be-welded piece. A magnetic clamping piece is adopted to clamp a glass to-be-welded piece and a metal to-be-welded piece to form a to-be-welded assembly, a gap between the glass to-be-welded piece and the metal to-be-welded piece is reduced, and a magnetic field can bind plasmas generated in the laser welding process of the glass to-be-welded piece and the metal to-be-welded piece to a welding area; the glass and the metal can be effectively connected even under the non-optical contact condition, the requirement of laser welding of the glass and the metal for a contact gap is reduced, and the welding quality is improved.

This utility model discloses a cross-joint rotating box-shaped column structure, relating to the field of building support structure technology. It includes a first cross-joint plate and a second cross-joint plate, both with corresponding slots. The first and second cross-joint plates are combined to form a cross plate. A U-shaped box column is provided outside the cross plate, with a cross column welded to the front end of the U-shaped box column. This utility model, employing a cross-joint rotating box-shaped column structure, significantly enhances the column's torsional resistance, improves the overall structural stability and safety, reduces deformation and displacement, optimizes the welding process, improves welding efficiency and quality, reduces construction costs, and enhances the connection performance between components through optimized node connection methods, reducing the risk of node failure and ensuring the overall reliability of the structure. The box-shaped column design provides a more robust connection effect, and the continuous, flat surface facilitates anti-corrosion coating.

The invention provides a flux-cored wire and a preparation method and application thereof, and particularly relates to the field of welding materials. The flux-cored wire comprises a steel belt and a flux core wrapped in the steel belt, and the flux core comprises, by mass, 33%-35% of micro-carbon ferrochrome, 21%-23% of calcium fluoride, 11%-13% of nickel powder, 12%-14% of rutile, 7%-9% of iron-molybdenum alloy, 3%-5% of manganese powder, 2%-4% of ferrotitanium, 1%-2% of ferrosilicon and the balance iron powder. The flux-cored wire can be suitable for all-position welding, is stable in welding arc, easy in slag removal, smooth in wire feeding and attractive in weld joint forming, has better hardness and excellent impact resistance and crack resistance, has the weld joint hardness up to 68 HRC, is applied to turbine blade repair, and can greatly prolong the service life of turbine blades.

The invention discloses a high fracture toughness flux-cored wire for ocean engineering, which comprises a carbon steel sheath and powder filled in the sheath, and is characterized in that the powder comprises non-metal powder and metal powder; the non-metal powder comprises the following components in parts by weight: 360-380 parts of titanium dioxide; 13 to 25 parts of quartz; 40 to 50 parts of potassium silicotitanate; 35 to 55 parts of sodium silicotitanate; and 13-18 parts of cryolite. The welding wire is suitable for multi-layer and multi-pass welding of an EH36 steel plate with the thickness of 80 mm; and the welding heat input is controlled to be 12-25 kJ / cm, and good process adaptability is achieved.

The invention relates to a high-corrosion-resistance low-porosity MIG welding method for 5xxx high-magnesium rare earth aluminum alloy plates, two 5xxx high-magnesium aluminum alloy thick plates with the same material and thickness are welded, the welding position is the transverse position, a groove is an asymmetric V-shaped groove, the single-edge angle of one side of the groove is 20-35 degrees, the single-edge angle of the other side of the groove is 40-50 degrees, and the bottom gap is 0-2 mm; before MIG welding of the front face, the back face of the 5xxx high-magnesium aluminum alloy thick plate is fixed through a 1-2-degree reversible deformation fixing reinforcing row in the welding direction so as to prevent welding deformation, facilitate bubble overflow in the welding process, improve the welding quality and guarantee the welding effect and the flatness of the surface after welding. And a welding gun is adopted for welding along the asymmetric v-shaped groove, and after welding is finished, the reversible deformation fixing reinforcing row is dismounted. By means of the method, it can be guaranteed that the yield strength of the welded joint is not lower than 198 Mpa, the tensile strength is not lower than 333 Mpa, the welding process is simple and rapid, repeated welding is not needed, the welded joint cannot be softened, and the corrosion resistance of the welded joint is improved.

The utility model relates to the technical field of endoscopes, in particular to an image capturing module and an endoscope. The image capturing module comprises a lens assembly, a circuit board and a transmission structure, the lens assembly is arranged at one end of the circuit board and electrically connected to the circuit board, the transmission structure comprises a flexible circuit board, one end of the flexible circuit board is provided with a plurality of second conductive parts arranged at intervals in the width direction of the flexible circuit board, and the second conductive parts are configured to be electrically connected with the first conductive parts. The other end of the flexible circuit board is provided with a third conductive part, and the third conductive part is configured to be connected with an external circuit. The wire harness of the lens assembly is welded on the circuit board in an aligned manner, then the flexible circuit board of the transmission structure is welded with the circuit board in an aligned manner, and the flexible circuit board is connected to the external circuit, so that the welding process is effectively simplified, and the connection reliability and the connection efficiency are improved.

The utility model relates to a kind of ultra-thin Mini LED lamp panels, including substrate and lamp bead, at least one surface of the substrate is equipped with multiple inward recessed mounting grooves, the lamp bead is one-to-one correspondingly embedded in the mounting groove, the substrate has inner layer circuit layer, the inner layer circuit layer extends to the groove bottom of the mounting groove and forms welding part, the welding part is electrically connected with the lamp bead.The ultra-thin Mini LED lamp panel of the utility model is reasonable in structure, can effectively reduce the thickness of lamp panel, while ensuring the reliability and high efficiency of lamp bead connection.

The utility model provides a cylindrical lithium battery. The cylindrical lithium battery comprises a shell, a negative electrode cover plate and a negative electrode current collecting disc, the shell comprises a first wall part, the negative electrode cover plate comprises a second wall part, the negative electrode current collecting disc comprises a third wall part, the shell, the negative electrode cover plate and the negative electrode current collecting disc are connected in a mutually nested mode, and the third wall part is arranged along the axial direction of the shell. According to the cylindrical lithium battery, the first wall part, the second wall part and the third wall part are overlapped at the set height, and the first wall part, the second wall part and the third wall part are integrally and hermetically connected through laser penetration welding, so that the process of welding the negative electrode current collecting disc and the shell does not need to be independently carried out, namely, the cylindrical lithium battery has the advantage of simple welding process, and the production efficiency is improved. The manufacturing cost can be effectively reduced, and the manufacturing efficiency is improved.

The utility model discloses a kind of shell of cylindrical battery and cylindrical battery.Casing includes single pass barrel, welding area, liquid injection hole and explosion-proof valve.Single pass barrel is composed of bottom cover and side wall, adopts aluminum metal integrated molding or welding seal;Welding area is located in bottom cover, thickness 0.2~0.4mm, 0.1~0.3mm is protruding to shell inside, periphery is equipped with 0.05~0.08mm deep's nick thinning structure, forms auxiliary explosion-proof design.Welding area can be long strip or sector, multiple welding area area accounts for bottom cover 20%~50%.Cylindrical battery includes the casing and battery cell, and battery cell tab is directly welded with welding area.The utility model cancels busbar, improves space utilization, reduces internal resistance, improves capacity and rate performance;Nick and explosion-proof valve cooperate to enhance security.

The invention provides an electric bucket rod device which is used for connecting and supporting a bucket and comprises a first bucket rod and a second bucket rod which are arranged in parallel, the end of the first bucket rod and the end of the second bucket rod are each connected with a bucket rod support, and the two bucket rod supports are symmetrically arranged and fixedly connected through a connecting cylinder; the bucket rod support comprises a first connecting end, a second connecting end, a third connecting end and a connecting column, the first connecting end is connected with the bucket rod, the second connecting end and the third connecting end are connected with a bucket connecting rod, the connecting column is connected with the connecting cylinder, and the connecting column is integrated with the first connecting end, the second connecting end and the third connecting end. The bucket rod support is a casting part, the casting part is not provided with a welding seam, when the bucket rod support bears the load applied by the bucket, no load of the bucket rod support is concentrated in the welding seam area, stress can act on the casting part body, and structural cracking caused by welding can be reduced. Therefore, the bucket rod support is good in overall bearing characteristic, high in fatigue resistance, capable of bearing large loads and not prone to damage.

The invention discloses a composite material, a preparation method and application, and belongs to the technical field of ceramic-metal connection, the composite material comprises a metal-ceramic composite layer and a non-metal layer, the metal-ceramic composite layer comprises a metal layer and a ceramic layer, the ceramic layer is arranged on at least one part of the surface and the interior of the metal layer, and the non-metal layer is arranged between the metal layer and the ceramic layer. The non-metal layer is arranged on the surface of the ceramic layer away from the metal layer. When the composite material is used for aluminum alloy-ceramic welding, metallization treatment does not need to be conducted on the surface of a ceramic workpiece, then the welding technological process is simplified, cost is reduced, and meanwhile environmental pollution can be reduced.

This invention discloses a configurable surface mount common mode inductor, comprising a housing, a magnetic core, an epoxy PCB connection cover, and a bottom epoxy resin layer. The housing has an internal groove with a U-shaped winding at its axial center, forming an annular gap between the groove and the U-shaped winding. The magnetic core is disposed within this annular gap. Four mounting slots are symmetrically formed at the top of both side walls of the housing, and SMT surface mount terminals are mounted in these slots. The epoxy PCB connection cover is welded to a support base, thus sealing the magnetic core and U-shaped winding within the housing. The bottom epoxy resin layer is installed at the top of the housing, enclosing the entire housing into a square structure. This structure effectively reduces labor costs, improves manufacturing efficiency, and includes built-in soldering terminals for convenient SMT soldering.

The invention discloses a competitive phase dynamics design-based laser in-situ welding method for inhibiting SiCp / Al interface reaction. The competitive phase dynamics design-based laser in-situ welding method comprises the following steps of: fixing a middle layer and SiCp / Al composite materials positioned on two sides of the middle layer; and the SiCp / Al composite material and the middle layer are formally welded through a continuous laser beam. According to the chemical metallurgical performance of the SiCp / Al composite material, design and in-situ laser welding are carried out through the competitive phase kinetic principle between an Al4C3 brittle phase generated through the interface reaction of the material and an intermetallic compound generated through the laser in-situ reaction of a connector, the interface reaction during fusion welding of the SiCp / Al composite material is inhibited, generation of the hard and brittle Al4C3 phase is avoided, and the fusion welding quality of the SiCp / Al composite material is improved. And a high-quality welding joint is obtained.

The invention relates to the technical field of miniature electronic equipment, and discloses a low-cost composite vibrator and a linear vibration motor, and the low-cost composite vibrator comprises a high-density core which is made of tungsten or tungsten alloy and is flat, and the middle part of the high-density core is provided with a through square hole for accommodating magnetic steel; the metal shell is made of steel formed through punching, is of a cover-shaped structure with an opening in the top and is used for wrapping and fixing the high-density core; the high-density core is embedded into the containing cavity of the metal shell, and the high-density core and the metal shell are fixedly connected along the joint edge through laser welding to form the whole composite oscillator. By elaborately designing the sizes and the wall thicknesses of inner and outer parts, the total mass and the gravity center position of the composite oscillator are equivalent to those of an all-tungsten oscillator; therefore, the vibration performance and the start / stop characteristic of the linear motor are not negatively influenced.

A precision welding fixture and processing method for a titanium alloy thin-diameter thin-walled straight tube assembly. The welding fixture includes a base, a support rod, a lower support plate, a column, an upper support plate, a straight tube limit sleeve and an elbow limit mechanism. The upper support plate, the column, the lower support plate and the support rod are arranged on the base from top to bottom, the straight tube limit sleeve is arranged on the upper support plate, the elbow limit mechanism is arranged on the lower support plate, the assembly is clamped between the elbow limit mechanism and the straight tube limit sleeve, and an argon gas introduction structure is arranged in the elbow limit mechanism. The processing method steps are: cleaning the elbow and straight tube of the titanium alloy thin-diameter thin-walled straight tube assembly; combining and clamping the elbow and straight tube of the assembly by using a welding fixture; introducing argon gas into the elbow limit mechanism; welding the elbow and straight tube of the assembly; vacuum heat treating the welded assembly; lathing the assembly after vacuum heat treatment until the parts to be processed on the assembly meet the design requirements of the drawings.

The application provides a welding wire, a flux core and a cladding metal suitable for welding of 09CrCuSb steel, and belongs to the field of welding materials.The raw material of the flux core comprises, in weight parts, 3.0-6.0 parts of natural rutile, 1-3 parts of 75# ferrosilicon powder, 0.2-0.5 parts of sodium titanate, 0.1-0.3 parts of aluminum powder, 0.2-0.3 parts of fluoride, 1-3 parts of manganese iron powder, 0.6-1.2 parts of metallic chromium, 0.20-0.80 parts of copper powder, 0.2-0.4 parts of ferrochrome, 0.2-0.5 parts of quartz sand, 0.1-0.3 parts of antimony powder, 0.8-1.8 parts of iron powder and 0.4-1.0 parts of electrolytic manganese, so as to solve the problem of poor sulfuric acid dew point corrosion resistance of the cladding metal formed by welding of 09CrCuSb steel in the prior art.