37results about How to "Avoid welding deformation" patented technology

The invention relates to the technical field of angle steel tower welding, in particular to an angle steel tower base automatic welding system and method.The angle steel tower base automatic welding system comprises a base and a storage table and further comprises a controller, a welding mechanism, a splicing mechanism and a limiting mechanism; the splicing mechanism comprises a driving assembly, four pushing assemblies and eight electric clamping jaws, the limiting mechanism comprises a tightening block, an abutting assembly and a lifting assembly, an L-shaped rod is fixedly arranged at the top of the workbench, and the tightening block is fixedly arranged at the bottom of the lifting assembly. Through multi-directional abutting limiting, the shapes and the relative positions of the bottom plate and the four rib plates can be effectively controlled, internal stress generated by heating in the welding process of the four rib plates and the bottom plate is balanced, welding deformation is prevented, and then the welding effect is improved.

The utility model provides a welding steel plate heating device which comprises a first heating set and a second heating set, the first heating set comprises a first mounting plate with a movable position, a first mounting groove is formed in the middle of the first mounting plate, two first sliding blocks are connected in the first mounting groove in a sliding mode, and the second heating set comprises a second mounting plate with a movable position. A second mounting groove is formed in the middle of the second mounting plate, two second sliding blocks are slidably connected into the second mounting groove, the first sliding block is fixedly connected with a first telescopic rod, the second sliding block is fixedly connected with a second telescopic rod, one end of the first telescopic rod is fixedly connected with a first heating structure, and one end of the second telescopic rod is fixedly connected with a second heating structure; the first heating structures are higher than the second heating structures, the two first heating structures are arranged on the two sides of the welding seam correspondingly, it is guaranteed that a welding part is evenly heated, the large welding temperature difference generated when the thickness of the welding part is too large or the width of the welding seam is too large is avoided, and therefore welding deformation caused by the welding temperature difference is avoided.

The utility model relates to the technical field of welding tools, in particular to an energy storage box body tailor-welding tool which comprises a base support, a clamping support is arranged on the side face of the base support and connected with the base support through a sliding structure, and a supporting block and a bottom plate clamping device are arranged below the base support. A side plate positioning device is arranged below the clamping support, a plurality of side plate cushion blocks are arranged on one side of the clamping support, and side plate clamping devices are arranged on the two sides of the clamping support. Compared with the prior art, the side plate is positioned and clamped through the clamping support, then the side plate is moved to the welding position through the sliding structure to be welded, carrying and welding position positioning are facilitated, the side plate cushion blocks are arranged on one side of the clamping support so that the side plate can be evenly stressed, and welding deformation is prevented.

The invention belongs to the field of nuclear power, and discloses a method for controlling butt welding straightness of a thick-wall stainless steel pipe, which comprises the following steps of: processing a welding groove of the stainless steel pipe; the machined steel pipe is assembled; spot welding and fixing; rotating the workpiece to measure the rotation jerk value of the workpiece, and recording a first displacement value; backing welding is conducted on a weld joint; repeating displacement value measurement again to obtain a second displacement value; the two displacement values are compared, and the straightness deformation direction and size after one weld joint is welded are determined; the welding starting position is adjusted to the reverse side where the welding deformation direction is determined; carrying out filling welding; and repeating the second displacement value acquisition until the stainless steel pipe is welded. A special weld groove is used, gapless assembly is performed, and a specific spot welding process is matched; according to the method, an automatic argon arc welding method is used, welding deformation of each welding seam is monitored in the welding process, and the direction of an arcing point of the next welding seam is controlled according to the current deformation direction, so that the straightness of the large-wall-thickness stainless steel pipe after butt welding is controlled.

The invention belongs to the technical field of laser welding, and discloses a medium-thickness plate welding process without beveling, three groups of laser arrays are adopted for welding, the first laser array completely covers a butt joint gap to generate a stable molten pool with shallow depth and large melting area, and the second laser array melts and gasifies materials to form a deep melting key hole. The third laser array acts on the rear wall of the deep melting key hole to maintain the opening state of the key hole, and the third laser array, the first laser array and the second laser array jointly act to form a Y-shaped large key hole; due to the fact that the three sets of laser arrays are adopted for parallel machining, the total welding input energy can be accurately controlled, large-penetration-depth single-time welding of pure laser is achieved, and meanwhile the problems of welding deformation and incomplete penetration during multi-pass welding are solved; the to-be-welded workpiece does not need to be beveled in advance, the workpiece does not need to be cleaned before welding, and the welding efficiency can be effectively improved.

The hot pressing plate dihedral tool comprises pressing plate assemblies and a frame, the frame comprises a corner face, a first side face and a second side face, the included angle between the first side face and the second side face is the same as the angle of a corner of a pressed hot pressing plate, and the corner face, the first side face and the second side face are all connected with the pressing plate assemblies in a sliding mode. The pressing plate assembly is detachably connected with the frame, all parts in the pressing plate assembly are detachably connected, the pressing plate assembly and the frame are both made of aluminum, all parts in the hot pressing plate dihedral tool are detachably connected, and the hot pressing plate dihedral tool avoids welding deformation, is easy to machine, low in manufacturing cost, light in weight and easy to carry and operate; and the construction efficiency is improved.

The utility model relates to a spray booth cross arm support quick-insertion structure in the technical field of spray booth equipment installation, which comprises a vertical rod and a cross arm pipe, and a diagonal bracing piece is connected between a vertical rod body and a cross arm pipe body; an inner tube seat is movably inserted in the end part, corresponding to the vertical rod, of the cross arm tube along the axial direction of the cross arm tube in a matched manner, the outer end surface of the inner tube seat is fixedly connected with the vertical rod, a mounting hole is formed in the outer wall of the inner tube seat, a clamping type nut is clamped in the mounting hole, and a connecting hole for penetrating a bolt to connect the clamping type nut is formed in the tube wall, corresponding to the clamping type nut, of the cross arm tube; the middle of the upper end face of the inclined supporting piece is provided with an inserting plate strip in the axial direction of the cross arm pipe, the lower pipe wall of the cross arm pipe is provided with a long-strip-shaped hole correspondingly matched with the inserting plate strip to be movably inserted, the long-strip-shaped hole is longer than the inserting plate strip, and the end, away from the inner pipe base, of the inserting plate strip is provided with an inserting seam so that after the cross arm pipe is inserted into the inner pipe base, the inserting seam can be inserted into the inserting plate strip. The insertion seams can clamp the hole edges of the corresponding end parts of the strip-shaped holes; according to the cross arm support quick-insertion structure, the cost and the disassembly and assembly difficulty can be reduced, and the disassembly and assembly convenience is improved.

The utility model relates to the technical field of steam turbine nozzles, and discloses a positioning device for installing and welding a steam turbine nozzle, the positioning device comprises a bottom plate, an arc-shaped positioning plate and an arc-shaped fixing plate, the arc-shaped positioning plate and the arc-shaped fixing plate are concentrically arranged and are arranged on the bottom plate at intervals from inside to outside; an arc-shaped groove with an upward opening is formed in the upper surface of the arc-shaped positioning plate and used for positioning the lower end of the nozzle inner ring, and a pressing block assembly is arranged between the arc-shaped positioning plate and the arc-shaped fixing plate and used for pressing and fixing the lower side of the shroud ring to the arc-shaped positioning plate. The positioning device further comprises a clamping assembly which is arranged between the upper end of the nozzle inner ring and the upper end of the shroud ring and used for clamping and fixing the nozzle inner ring and the upper end of the shroud ring. By means of the positioning device, the assembly positioning accuracy of the nozzle inner ring and the shroud ring can be guaranteed, meanwhile, welding deformation can be prevented in the welding process, and the welding quality of the nozzle is guaranteed.

The utility model discloses a steel structure modularization assembly system of a multi-story building. The steel structure modularization assembly system comprises column modules, beam modules and beam column assembly joint modules. The column module comprises a column body and column end plates arranged at the two ends of the column body, and a plurality of first bolt holes are formed in the column end plates; the beam module comprises a beam body and beam end plates arranged at the two ends of the beam body, and a plurality of second bolt holes are formed in the beam end plates; the beam column assembly joint module comprises a supporting body and joint end plates arranged at the two ends of the supporting body, a plurality of third bolt holes are formed in the joint end plates, the beam column assembly joint module further comprises a plurality of joint side plates, the joint side plates are arranged around the supporting body, and each joint side plate is installed on the edges of the two joint end plates at the same time. The steel structure modularization assembly system has the advantages of being clear in structural stress, good in machining quality, fast in installation, capable of guaranteeing installation quality easily and the like, and is a novel building mode suitable for industrial and civil multi-story buildings.

The invention relates to a 50MW supercritical CO2 axial flow turbine with a volute for air inflow. Supercritical carbon dioxide circulation has become one of hot-spot technologies in the field of energy and power by virtue of the advantages of high thermal efficiency, high compactness, high economic-environmental protection property and the like. The high-pressure air compressor comprises a front bearing box, a rear bearing box, a high-pressure cylinder and a rotor, the high-pressure cylinder is of a double-layer cylinder structure and comprises a high-pressure inner cylinder and a high-pressure outer cylinder, the two sides of the high-pressure outer cylinder are connected with the bearing boxes through positioning cat claws, and an air inlet of the high-pressure cylinder is connected with a main steam adjusting combined valve; blades on the rotor are of a multi-stage small enthalpy drop reaction type structure. The 50MW supercritical CO2 axial flow turbine is used for volute air inlet.

This application provides a radially inlet anti-icing bleed air collecting ring structure, belonging to the field of aero-engine technology. It includes a collecting ring welding assembly, an inlet casing, and an inlet support plate. The inlet support plate is welded to the inlet casing. The collecting ring welding assembly includes a collecting ring, an inlet pipe, and a collecting ring cover plate. The collecting ring cover plate and the collecting ring form an annular collecting cavity. The inner wall of the collecting ring is fitted onto the outer side of the inlet casing assembly. A radial ventilation hole is provided on the inner wall of the collecting ring. An anti-icing bleed air inlet hole is provided on the inlet support plate. The radial ventilation hole and the anti-icing bleed air inlet hole are connected by a bleed pin. The inner cavity of the inlet support plate communicates with the collecting cavity through the through hole of the bleed pin. A bleed pin mounting hole is provided on the outer wall of the collecting ring, and this hole is sealed by a plug. One end of the inlet pipe is connected to the outer wall of the collecting ring and communicates with the collecting cavity, while the other end is connected to the anti-icing bleed air circular pipe. This application achieves a compact and detachable design, reducing pressure and temperature losses during the flow of anti-icing bleed air.

This invention discloses an automated welding production line and welding method for L-shaped ribbed steel bridge deck unit joints, relating to the field of bridge welding manufacturing technology. The automated welding production line includes L-shaped ribbed steel bridge deck units; gantry rails spaced at intervals; a multi-functional gantry workstation mounted on the gantry rails; a vision-teaching collaborative robot located inside the L-shaped ribbed steel bridge deck unit; and a tracked welding workstation located outside the L-shaped ribbed steel bridge deck unit. The automated welding method includes the following steps: S1: assembly and positioning; S2: hoisting and fixing; S3: equipment deployment; S4: first teaching welding; S5: second teaching welding; S6: equipment transfer; S7: repeating steps S2-S6 until all U-shaped groove welds of the T-shaped transverse ribs and partition joints of all L-shaped ribbed steel bridge deck units are completed. This invention solves the technical problems of low welding efficiency and unstable welding quality in existing L-shaped rib joints.

The invention discloses a rib plate welding assembly tool which is used for pushing a rib plate to be in butt joint with a barrel and then welding the rib plate and the barrel, and comprises a bottom frame and a middle frame, and the top of the middle frame is provided with a rib plate assembly platform capable of translating towards the direction of the barrel; the rib plate assembling platform is provided with a cross beam assembly capable of horizontally moving in the direction of the cylinder and used for pushing rib plates to the rib plate assembling platform. A forward pushing and pressing unit is arranged on the beam assembly and used for pushing the rib plates on the rib plate assembling platform forwards twice to the front end of the rib plate assembling platform and pressing the rib plates for welding after the rib plates make contact with the barrel to be assembled on the rib plate assembling platform in a translation mode. The device has the advantages that the structure is simple, the automation degree is high, the butt joint precision is high, and rib plate deformation is avoided.

This invention discloses a welding positioning device and its forming method for training missiles. The welding positioning device includes: a missile body welding fixture, a pouring fixture, a tail fin welding fixture, and two centers. Each of the two centers consists of a frustum and a round rod coaxially fixed to the large-diameter end of the frustum. The two centers are respectively used to hold the inner hole of the missile body's central tube and the positioning sleeve. The missile body welding fixture is used to weld and position the missile head and cylindrical section, and the missile head and mounting sleeve. The pouring fixture is used for pouring and forming concrete inside the conical section of the missile body. The tail fin welding fixture is used to weld and position the tail fin and the conical section, and to ensure the relative angle between the tail fin blades and the positional relationship between the blades and the missile body axis. This invention can ensure the welding quality and welding accuracy of the training missile, thereby ensuring coaxiality, symmetry, and straightness.

The application discloses a titanium alloy bogie beam forming device and forming method, the forming device comprises a platform; a guide rail is arranged along the Y-axis direction; supports are distributed along the length direction of the platform; support platforms are symmetrically distributed on both sides of the supports and are slidably connected with the platform through the guide rail; a centering and jacking device is fixedly connected with the support, and both ends of the centering and jacking device can abut against and contact the bottom end of the B surface of the beam; a supporting device is arranged above the centering and jacking device, and both ends of the supporting device can abut against and contact the top end of the B surface of the beam; a plurality of beam jacking devices are arranged on the support platform and are distributed on the A end, the B end and the A surface of the beam; a beam pressing device is arranged on the A surface side of the beam and is arranged on the support platform; a longitudinal beam pressing device is arranged on the C surface side of the small longitudinal beam and is arranged on the support; a plurality of longitudinal beam jacking devices are distributed on both sides of the small longitudinal beam and are arranged on the support and the longitudinal beam pressing device, and the application has the effects of accurate positioning, high precision and improved product quality.

The utility model discloses an elevator side plate anti-deformation welding tool, which comprises a water tank, a working table, a water pump, a plurality of spray pipes, a plurality of clamping mechanisms and a movable plate, the working table is arranged above the water tank, a hollow area is arranged on the working table, the spray pipes are arranged below the hollow area, nozzles are arranged on the spray pipes, and the water pump is arranged on the water tank. A water tank is arranged at the front end of the working table, a water pump is arranged at the rear end of the working table, the input end of the water pump is communicated with the water tank, the output end of the water pump is communicated with the spray pipe, a plurality of clamping mechanisms arranged in a row are arranged at the front end of the working table, a movable plate is arranged at the rear end of the working table, and a plurality of clamping mechanisms arranged in a row are arranged on the movable plate. And welding deformation is avoided.

This invention relates to a radiator grid structure and its forming process, belonging to the field of welding technology. It solves the problem that existing technologies lack suitable grid structures for radiator products, making it impossible to form open areas and thus hindering the lightweighting of radiator products. The radiator grid structure includes grid plates and baffles, with the baffles sequentially connected to form a closed loop. The grid plates are inserted into the internal space formed by the baffles to form open areas, and the ends of the grid plates are fixedly connected to the baffles. This invention achieves lightweighting of products in the aerospace field.

This invention belongs to the field of steel formwork processing technology, specifically a precast grandstand steel formwork splicing and welding device, including a welding fixture. A steel formwork is mounted on the welding fixture, and pressure strips are respectively provided on both sides of the top of the steel formwork. A first insertion sleeve is fixedly connected to each of the two pressure strips. A first bearing bracket is fixedly connected to each of the first insertion sleeves on the welding fixture, and a first combined sleeve is rotatably connected to each of the first bearing brackets. In this invention, a first hydraulic cylinder drives a linkage frame and a second double-sided gear, causing the pressure strips on both sides to apply equal downward pressure to the top of the steel formwork, avoiding template tilting or stress concentration caused by unilateral pressure. The downward pressure can be adjusted according to the steel formwork model to meet differentiated pre-pressing requirements. The mechanical transmission chain ensures uniform pressure distribution. Pre-pressing before welding effectively constrains the tendency for thermal deformation, providing a stable benchmark for subsequent welding.

The present application relates to the technical fields of new fuel auxiliary equipment, in particular to a kind of new fuel storage container internal partition plate welding auxiliary device;Technical scheme: a kind of new fuel storage container internal partition plate welding auxiliary device, including electric push cylinder, base frame assembly, connecting plate assembly, traction assembly and support assembly, electric push cylinder is installed on base frame assembly, connecting plate assembly is connected with the push rod end of electric push cylinder, traction assembly includes steel wire rope main body and screw thread tightener;The support plate between the tank body and the partition plate is embedded in the present application, the accurate positioning of the partition plate is realized and the continuous support is provided during welding process, effectively inhibits welding deformation, simultaneously by electric push cylinder pulling support plate synchronous movement, realize micro straightening, significantly improve welding quality and size consistency.

The invention discloses a part welding machine for aluminum alloy unmanned aerial vehicle shell machining, and relates to the technical field of welding. Comprising a workbench, a welding mechanism is arranged at the rear end of the workbench, a clamp is arranged at the top of the workbench, a mounting box is fixed to the middle of the right end of the workbench, a hand supporting assembly is arranged in the mounting box, a front supporting assembly is arranged at the end, close to the welding mechanism, of the mounting box, and a protection assembly is arranged at the end, close to the clamp, of the front supporting assembly. Stable supporting force is applied to the palm of a worker through the hand supporting assembly, the stress state of welding operation is optimized, the front side of a part is lifted through the front supporting assembly, meanwhile, welding thermal deformation is prevented, closed safety protection is formed for a welding area through the protection assembly, and the welding safety is improved. And full-flow assembly synchronous action with hand force application as a single trigger point is achieved through cooperation of multiple sets of hydraulic boxes.

The invention relates to an intelligent heating animal drinking water device, which belongs to the field of cultivation, and comprises a drinking water tank body, a water inlet assembly, a temperature monitoring assembly, a heating assembly, a heat preservation assembly and a protection assembly, the temperature monitoring assembly, the heating assembly and the heat preservation assembly are installed on the lower portion of the water trough body, and the protection assembly is installed on the side portion of the water trough body. The invention has the following advantages: the whole body is made of stainless steel 304 material, and has good anti-rust performance and good antibacterial performance; the wall thickness of all materials is larger than 1.2 mm, welding deformation can be effectively avoided, and the overall consistency of equipment is improved. And moreover, the rigidity and the overall strength of the equipment are greatly improved, and the overall crashworthiness of the equipment is better guaranteed.

The utility model relates to ladder stand production technical field, and disclose a kind of steel pipe pole ladder stand butt welding device, it include: base, base top fixed mounting is grouped distribution's stand; Adjusting structure, adjusting structure includes lifting frame, swing arm and stop block, lifting frame is movably arranged in the side of stand and can be along the vertical displacement of stand, the side of lifting frame is articulated swing arm, stop block is movably arranged in the side of swing arm, accurate control stop block displacement by second driving motor cooperation second screw rod, to accurately adjust the opening angle of swing arm, ensure the group precision of cross bracing pipe and main rod, the manufacturing quality of ladder is greatly improved, strong adaptability, adjustable swing arm structure is used, by changing swing arm angle can be adapted to diameter range different specifications cross bracing pipe, the vertical adjusting range of lifting frame is big, satisfy the group demand of different height cross bracing pipe, realize one machine multiuse.

The invention provides an assembling, welding and anti-deformation tool for a thin-wall sealed container as well as a manufacturing method and a using method of the assembling, welding and anti-deformation tool, and belongs to the technical field of anti-deformation tools. Welding cushion blocks are arranged at the two ends of two semi-arc plates respectively, radius fine adjustment bolts are arranged on the welding cushion blocks, the two semi-arc plates are connected into a complete circular ring through hexagon nuts and threads of the radius fine adjustment bolts, positioning nuts are evenly arranged along the shapes of the semi-arc plates, and force application bolts are connected with the positioning nuts through threads. According to the welding and anti-deformation tool for the novel thin-wall sealed container, the tool can adapt to cylinders with various diameters by adjusting the initial positions of the bolts, and the manufacturing cost of tools with different models is reduced by adjusting the opposite openings of the end sockets. Eight evenly-distributed inner wall supporting points are provided while roundness correction is conducted, and the distances of the bolts extending out of the semicircular arc plates are controlled to be the same, so that even and powerful annular supporting can be provided to restrain welding deformation.

The utility model discloses a loader gearbox output shaft oil seal dustproof structure which comprises an output shaft, a dustproof cover, a box body with a box body boss and an oil seal. The oil seal is mounted on the box body, and an inner ring of the oil seal is mounted on the output shaft; the dustproof cover is in an S shape, the dustproof cover is installed on the left side of the output shaft in an interference fit mode, the inner side of the dustproof cover is embedded into the oil seal hole of the box body, the outer side of the dustproof cover covers the left side of the boss of the box body, and therefore a C-shaped gap is formed between the dustproof cover and the box body. The oil seal assembly is simple and compact in structure, low in manufacturing cost, easy and convenient to assemble and reliable to use, and solves the problems that when a loader in the prior art shovels, the oil seal is damaged due to the fact that gravel collides with the oil seal of the output shaft, and oil leaks due to lip abrasion.

The utility model discloses a fixture for laser hybrid welding fixation of a plate exchange tube box, relates to the field of plate exchange tube box heat exchangers, and aims to solve the problems of low welding efficiency and poorer welding seam quality in the welding process of a semi-header, which comprises a bottom plate, a tube box fixer is arranged on the bottom plate, an equipment workbench is arranged on one side of the tube box fixer, and the equipment workbench is arranged on the other side of the tube box fixer. A connecting plate is fixedly connected to the equipment workbench, the inner side of the connecting plate is located under the laser composite welding head, a pressurizing plate is arranged on the other side of the tube box fixator, and the semi-header welding tool has the advantages that the tool is light, small and exquisite and convenient to install, the semi-header and the connecting plate are stably supported, and the welding seam quality is improved.

The invention belongs to the technical field of laser welding, and particularly relates to an aluminum plate laser welding device with a thermal deformation control structure, which comprises a base, a PLC (programmable logic controller), a positioning clamp assembly, a welding position adjusting assembly and a side synchronous pressing and cooling assembly, the movable end of the welding position adjusting assembly is fixedly connected with a positioning frame, and the lower end of the positioning frame is fixedly sleeved with a laser welding head in an inserted mode. The two aluminum plates are symmetrically arranged, and laser is vertically and directly opposite to the center of a welding seam for incidence, so that the aluminum plates on the two sides are uniformly heated, temperature fields are symmetrical, and continuous and synchronous cooling is realized by matching with the circulating flexible heat-conducting tracks synchronously moving on the two sides of the welding seam, heat can be quickly guided out, the temperature gradient and thermal stress are reduced, and welding deformation is inhibited; and meanwhile, through stable pressing and fixing and non-sliding-friction contact, vibration displacement and surface scratching of the aluminum plate are effectively avoided, and the welding process stability and the joint quality are further improved.

The invention relates to a standard modularized super-large specification cathode roller which comprises a steel shaft, the steel shaft is fixedly sleeved with a positioning plate coaxial with the steel shaft, the outer edge of the positioning plate is provided with a roller face, the roller face penetrates through the positioning plate and is coaxial with the positioning plate, the outer circle of the roller face is sleeved with a copper roller face, and the periphery of the copper roller face is sleeved with a titanium roller. According to the cathode roller, the titanium roller sleeves the copper roller surface through thermal fit, so that the cathode roller is easy to assemble, the welding amount is greatly reduced, the welding deformation is avoided, the assembly precision is improved, the balance of the whole roller is improved, the processing period is shortened, and the manufacturing cost of the cathode roller is reduced.

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 invention discloses welding equipment for hardware parts, and relates to the technical field of welding. The hardware part welding equipment comprises a bottom plate, a clamping and moving module used for clamping and moving a pipe fitting is arranged at the top of the bottom plate, and a clamping mechanism used for clamping and fixing a rectangular thin plate is arranged at the top of the bottom plate; the clamping mechanism comprises a supporting plate fixedly connected to the top of the bottom plate. According to the welding equipment for the hardware parts, during welding, a rectangular thin plate can be cooled, welding deformation and the like can be avoided, the welding quality is guaranteed, in addition, according to the size of the rectangular thin plate, the area, where cooling liquid is introduced, in the cooling cover can be adjusted in a self-adaptive mode, it is guaranteed that the cooling liquid can be introduced into the attached portion of the cooling cover and the rectangular thin plate, and the welding quality is improved. And cooling liquid is not introduced into other parts, so that the cooling efficiency and effect can be improved, the welding quality is further ensured, and the utilization rate of the cooling liquid can be improved.

The invention discloses a large-span open-web steel structure welding positioning device and a construction method thereof, and relates to the technical field of steel structure welding, the large-span open-web steel structure welding positioning device comprises a stand column, a lifting adjusting mechanism is slidably mounted on the outer wall of the stand column, and a positioning mechanism is fixedly connected to one side of the lifting adjusting mechanism; the positioning mechanism comprises a clamping assembly, the clamping assembly comprises a fixed clamping frame, a hot air plate is fixedly connected to the middle of the fixed clamping frame, a hot air groove is formed in one side of the hot air plate, and a hot air pipe is fixedly connected to the bottom of the hot air plate; by arranging the positioning mechanism, the to-be-welded position of the steel structure is supported and limited, the position of the steel structure is kept fixed, and the requirement for stability of welding operation is met; the clamping air cylinder drives the movable supporting frame to move to clamp the steel structure, the pressing air cylinder is matched to drive the pressing pad to press downwards, the steel structure is limited, and the clamping and positioning capacity of the steel structure is improved.