23results about How to "Avoid Weld Cracking" patented technology

The invention discloses a welding device for chemical container barrel assembly production, and belongs to the technical field of welding equipment.The welding device comprises a welding box, an inner welding mechanism, an outer welding mechanism and two sets of positioning mechanisms are arranged in the welding box, and the two sets of positioning mechanisms are arranged on the two sides of the outer welding mechanism; the outer welding mechanism comprises a welding frame and an arc-shaped seat, a round hole is formed in the welding frame, and the arc-shaped seat is slidably connected into the round hole; the inner welding mechanism comprises a fixed frame, a movable frame and a mounting disc. The other side of the mounting disc and one side of the arc-shaped base are both connected with welding assemblies. The welding assembly comprises a fixing plate, a mounting plate and a welding gun. Automatic and synchronous welding work of the inner ring and the outer ring of the barrel can be achieved through the inner welding mechanism and the outer welding mechanism, the power and the cooling rate of the welding gun can be automatically adjusted through the linkage mechanism and the adjusting mechanism according to the moving line of the welding gun relative to a workpiece, and uniform and efficient welding work is guaranteed.

The invention relates to the technical field of laser welding equipment, in particular to a shield tunneling machine part machining and welding device which comprises a machine table and a welding gun arranged on the machine table. The dust cover is mounted outside the welding gun head; the exhaust pipe is radially mounted at the bottom of the dust cover and is arranged in the welding seam direction; the exhaust opening is formed in the top of the exhaust pipe in a penetrating mode and located in the dust cover; the air suction port penetrates through the bottom of the air suction pipe; the opening is formed in the bottom of the side, away from the exhaust pipe, of the dust cover and extends towards the bottom end face of the dust cover; according to the device, through the arrangement of the exhaust pipe, external airflow can flow into the dust cover through the opening, smoke generated by welding in the dust cover can be exhausted from the exhaust opening along with the negative pressure of the exhaust pipe, and treatment of the welding smoke is achieved; and meanwhile, negative pressure is also generated at the air suction port, dust at the weld joint of the workpiece is also sucked away, the cleanliness of the weld joint can be ensured while smoke is removed, and the subsequent welding quality is improved.

The invention relates to a gearbox body crack welding repair method which comprises the following steps: S1, heating a welding rod to 145-155 DEG C and preserving heat; s2, a welding groove is machined in the crack; s3, the groove is preheated, and the preheating temperature ranges from 300 DEG C to 350 DEG C; s4, multi-layer and multi-pass welding is adopted for welding in the welding groove; s5, knocking the welded surface of the welding seam of the gearbox body, and releasing stress; s6, the surface of the welded gearbox body weld joint is heated to 600-650 DEG C, and asbestos is used for wrapping and slow cooling; and S7, after the gearbox body is cooled, primary penetrant flaw detection is carried out, and after a weld joint is ground to be flat, secondary penetrant flaw detection is carried out. During welding, a multi-layer and multi-pass welding process is adopted, through preheating and postweld heat treatment, welding stress is reduced, welding cracks are avoided, the problems of welding center change, stress concentration, postweld delayed cracks and the like can be effectively avoided, the gearbox body crack welding repair efficiency is high, and the repair effect is good.

The invention discloses a pitting-corrosion-resistant nuclear-grade duplex stainless steel welding rod and a preparation method and application thereof. The invention belongs to the technical field of welding. The nuclear-grade duplex stainless steel welding rod solves the problem that nuclear-grade duplex stainless steel welding rods with excellent tensile property, impact toughness and pitting corrosion resistance are lacked in the prior art. The pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode comprises the core wire and the coating coated on the outer wall of the core wire, the pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode has strong desulfurization and dephosphorization capabilities, the coating has a dehydrogenation effect, the room-temperature tensile strength exceeds 690 MPa, the room-temperature percentage elongation after fracture exceeds 20%, the-40 DEG C low-temperature impact is larger than 90 J, the pitting corrosion rate is smaller than 10 mdd, nitrided ferrochrome is added into the coating, and therefore the pitting corrosion resistance of the pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode is greatly improved, and the service life of the pitting-corrosion-resistant nuclear-grade duplex stainless steel electrode is prolonged. And the contents of Cr and N are increased, so that the pitting corrosion resistance index of deposited metal can be improved. The special requirements for tensile property, impact toughness and pitting corrosion resistance of the nuclear power station welding rod can be fully met, so that the nuclear power station welding rod can be applied to the fields of nuclear power station construction and the like.

The invention discloses a static pressure pile splicing structure and method for a photovoltaic power station in the technical field of static pressure piles, the static pressure pile splicing structure is applied to a static pressure pile body, the static pressure pile body should be provided with a pile hole, and the static pressure pile splicing structure for the photovoltaic power station comprises an upper connecting outer sleeve ring, a lower connecting outer sleeve ring and an upper connecting outer sleeve ring, the lower connecting inner lantern ring is arranged at the bottom end of the static pressure pile body, and the lower connecting inner lantern ring and the upper connecting outer lantern ring are matched in a nested mode; the first axial positioning grooves are formed in the inner wall of the upper connecting outer sleeve ring and are distributed in the axial direction of the static pressure pile body; and the third axial positioning groove is formed in the outer wall of the lower connecting inner sleeve ring. Through nesting of the upper connecting outer lantern ring and the lower connecting inner lantern ring and the welding process, rapid pile connection of the two static pressure pile bodies can be achieved, the axial rotation limiting function on the pile connection position of the two static pressure pile bodies is achieved, it is ensured that the two static pressure pile bodies can be stably connected, and the high use value is achieved.

The invention provides a welding method for a semiconductor gas distribution disc, which comprises the following steps of: fixing a base and a distribution plate of the semiconductor gas distribution disc by adopting a clamp, then determining a welding path, carrying out friction stir welding on a gap between the base and the distribution plate, and rotating a stirring head during friction stir welding. According to the welding method, heat generated by mutual friction in relative movement of the contact end faces of a weldment is utilized to enable the end faces to reach a thermoplastic state, and finally rapid upsetting is conducted to complete welding. The welding method is easy and convenient to operate, high in mechanization degree, high in welding strength and high in welding efficiency, the parallelism of the semiconductor gas distribution disc product is smaller than or equal to 0.3 mm, and the problem that welding seams are prone to cracking due to electron beam welding can be solved.

This application discloses a safety platform for a friction press, comprising: a press body, which includes a base, a flywheel, and a friction disc. The flywheel is rotatably mounted on the top of the base, and the friction discs are rotatably mounted on both sides of the flywheel. The friction discs are connected to the flywheel and are connected to the pulley of a motor via a belt; a support platform, which is located around the base and below the flywheel, and is fixed to the ground by columns; a fence, which surrounds the support platform; and a protective frame, which is mounted on the support platform and is used to cover the belt and motor. The friction press safety platform described in this application not only reduces the risk of falls from heights and avoids dangers caused by falling screws, nuts, washers, etc., but also effectively prevents the high-speed rotating pulley from falling in the event of a broken motor shaft, thus improving safety and reliability.

The invention discloses an anti-vibration and wear-resistant connecting device for a dust removal air pipe of a vibrating feeder, and relates to the technical field of vibrating feeders, the anti-vibration and wear-resistant connecting device comprises a connecting flange, a flexible rubber shell is fixedly connected to the inner side of the connecting flange, and protective covers are fixedly connected to the top and the bottom of the connecting flange correspondingly; according to the vibration feeder, the flexible rubber shell and the sealing mechanism are arranged, vibration force generated during operation of the vibration feeder is effectively absorbed and isolated, so that the problem of weld joint breakage of the dust removal air pipe is solved, meanwhile, the sealing mechanism of the device can ensure that the dust removal air pipe keeps good sealing performance in the vibration process, dust leakage is prevented, and the service life of the dust removal air pipe is prolonged. Particularly, when the dust removal air pipe of the vibrating feeder is connected, the connecting port is fixed to the outer wall of the air pipe, the hydraulic push-pull rod is operated to contract, the sliding disc is driven to move inwards along the sleeve, then the connecting rod and the polygonal connecting frame are pulled to move inwards, and the rotating rod is rotated by the hinge block on the connecting frame.

The invention relates to the technical field of steel structures, and discloses a hollow Y-shaped variable cross-section box-shaped column shaped like a Chinese character'Ya 'and a construction technology thereof.The box-shaped column comprises a box-shaped column shaped like a Chinese character'Ya', a Y-shaped box body section and a crotch bracket, the extending end of a main shaft of the Y-shaped box body section is connected with the box-shaped column shaped like a Chinese character'Ya ', and the middle of the Y-shaped box body section is trilateral hollow. The inner ring wing plate and the web plate are assembled and welded; hollowed-out web plates on the two sides of the Y-shaped box body section body are assembled and welded with the transverse partition plates and the longitudinal rib plates; the I-shaped arc is assembled and welded with the inner ring wing plate and the web plate; the box-type bracket side plates and the transverse partition plates are assembled and welded; the box-type bracket is assembled and welded; the T-shaped box column is in butt welding with the Y-shaped box body section; and assembling and welding the crotch corbel. The box type steel columns shaped like the Chinese character'Ya 'and the Y-shaped joints are adopted for combined supporting force, the overall stability and stress of the conversion joints are improved through the hollowed-out triangular reinforcing plates, and the device has the advantages of being large in stress, reasonable in force transmission, stable in structure, novel in modeling, capable of saving steel and the like.

This invention relates to a high-pressure resistant micro-circular tube D-shaped gas collecting pipe, comprising a D-shaped gas collecting pipe body. The D-shaped gas collecting pipe body is characterized by being composed of a pipe-through support with a folded edge and an inner hook-type outer shell. The pipe-through support is inserted into the inner hook groove on the inner hook-type outer shell through its folded edge, and the two are fixed together by welding to form the D-shaped gas collecting pipe body. An array of micro-circular heat exchange tubes are inserted through and welded to the pipe-through support. This invention, through a multi-layered structural reinforcement design, constructs a tightly coupled overall reinforced frame, thereby effectively and evenly distributing the high-pressure load to each component, avoiding weld cracking or structural deformation problems caused by stress concentration in traditional designs. Simultaneously, the double-layered shell design not only improves the pressure-bearing capacity of the gas collecting pipe but also endows it with excellent corrosion resistance, further extending the service life of the equipment.

The invention provides a slab crystallizer copper plate and back plate connecting structure, and relates to the technical field of crystallizers, the slab crystallizer copper plate and back plate connecting structure comprises a crystallizer main body and a water tank back plate main body, a clamping block is arranged on the outer side of the crystallizer main body, and a fixing nut is detachably assembled on the clamping block; the fixing nut is clamped and matched with the clamping block, and circumferential positioning and axial locking are realized through the limiting pin; connecting holes are formed in the positions, corresponding to the clamping blocks, of the water tank back plate body, fixing bolts penetrate through the connecting holes and then are in threaded connection with fixing nuts, and expansion gaps are reserved between the water tank back plate body and the clamping blocks after locking. Displacement generated by thermal expansion of the crystallizer copper plate is effectively compensated through the reserved expansion gap, and thermal stress concentration of the connecting part is avoided; reliable locking of the fixing nut is achieved through double positioning of the clamping teeth and the limiting pin, and the vibration resistance is improved; and meanwhile, the reliability, the safety and the service life of the connecting structure are remarkably improved.

This invention discloses an electron beam brazing repair method for replacing blade cover plates, comprising the following steps: placing a new cover plate between two oppositely arranged blade top walls, positioning the new cover plate on two oppositely arranged shoulder wall protrusions and an airflow baffle between the two shoulder wall protrusions, with the receiving groove on the new cover plate corresponding to the airflow baffle on the blade; inserting a first adhesive brazing filler metal into the receiving groove, and covering the first adhesive brazing filler metal with a first amorphous thin strip brazing filler metal; arranging a second adhesive brazing filler metal at the corner where the new cover plate connects to the shoulder wall protrusion, and covering the second adhesive brazing filler metal with a second amorphous thin strip brazing filler metal; heating and melting the first adhesive brazing filler metal and the first amorphous thin strip brazing filler metal to weld the new cover plate to the airflow baffle, and heating and melting the second adhesive brazing filler metal and the second amorphous thin strip brazing filler metal to weld the new cover plate to the shoulder wall protrusion. The amount of brazing filler metal can be precisely controlled, brazing filler metal is less prone to splashing, and the requirements for pre-welding treatment of the surface of the workpiece are not high.

The utility model provides a branch pipe for a central air conditioner and an installation structure of the branch pipe, and relates to the technical field of air conditioner branch pipes, the branch pipe comprises a pipe body, the pipe body comprises a main pipe, a first flow dividing pipe and a second flow dividing pipe, and the first flow dividing pipe and the second flow dividing pipe are integrally formed and are of a U-shaped structure; the main pipe and the horizontal sections of the first flow dividing pipe and the second flow dividing pipe are integrally formed through stamping, and the supporting assembly comprises connecting sleeves oppositely arranged on the outer walls of the first flow dividing pipe and the second flow dividing pipe in a sleeving mode in pairs, screw cylinders rotationally arranged on the side walls of the connecting sleeves and a screw connected between the two screw cylinders in a threaded mode. By means of the pipe body integrally formed through stamping, the quality of the pipe body can be improved, the problem of weld joint cracking caused by welding missing in a welding mode is avoided, the first flow dividing pipe and the second flow dividing pipe can be supported, the bending phenomenon of the first flow dividing pipe and the second flow dividing pipe is avoided, and the pipe body and the refrigerant straight pipe can be rapidly and stably installed.

This invention belongs to the field of welding processing technology, and specifically relates to a welding equipment for a ring main unit gas box. It includes a welding table and welding robots located on both sides of the welding table, as well as a positioning component, a welding residual stress relief component, and a sealing performance testing component fixed on the welding table. The welding residual stress relief component is located inside the positioning component; a transfer component is provided on the outer side of the welding table, and a top pressing component is fixed to the moving end of the transfer component, located directly above the positioning component. This invention integrates positioning, welding, stress relief, and sealing performance testing into one process. It relies on internal and external composite positioning to ensure the clamping accuracy of the sheet metal, utilizes weighing matching parameters to achieve precise adaptive vibration aging, and is equipped with an integrated positive pressure leak detection system. The entire process is automated, eliminating the need for workpiece transfer. While improving production efficiency and avoiding the risk of injury from impacts, it reduces leakage defects caused by welding deformation and residual stress from the source.

The utility model discloses a kind of steel anti-collision beam traction ring reinforcement structure, and anti-collision beam includes energy-absorbing box and the fixed bottom plate of energy-absorbing box welding connection, strengthening piece is arranged between the energy-absorbing box and fixed bottom plate, the strengthening piece includes connecting bottom plate, the connecting bottom plate is attached to fixed bottom plate and welds, the inner side of the connecting bottom plate is provided with arc flanging, one end of the arc flanging upwards is provided with inclined flanging, the inclined flanging is in contact with energy-absorbing box and welds, by being designed with the connecting bottom plate of fixed bottom plate attachment and by welding to the connecting bottom plate fixed, by the effect of arc flanging and inclined flanging, make flanging avoid the weld space of energy-absorbing box and fixed bottom plate, and by the welding of inclined flanging and energy-absorbing box, the strength of fixed bottom plate and energy-absorbing box connection has been improved, prevent the weld crack or part body crack failure between fixed bottom plate and energy-absorbing box, so as not to increase the thickness or strength of cross beam and energy-absorbing box, reduce cost.

The highway subgrade support welding machine comprises a working table and a moving table, a foldable containing table is arranged on one side of the working table, a sliding rail structure extending to the containing table is arranged at the top of the working table, and the moving table is installed on a sliding rail and can move in a reciprocating mode; a welding table is arranged on the workbench, and multiple sets of limiting parts and limiting assemblies correspondingly clamped are arranged in fixing areas on the two sides of the welding table. A bearing plate and a driving motor with an eccentric wheel are arranged in the fixing area and installed on the different limiting assemblies respectively, the support body is arranged on the bearing plate and pressed by the eccentric wheel, and the welding position is located above the welding table. The workbench is further provided with a first welding assembly and a second welding assembly. The welding machine can adapt to support bodies of different specifications, the problems that a traditional welding machine is inconvenient to fix and poor in adaptability, and the quality of a welding seam is poor due to the fact that a support is prone to deviation in the welding process are solved, and the welding efficiency and stability are improved.

The application discloses an electric core shell and an electric core, and is used for solving the problem that the welding seam between the explosion-proof valves of the existing electric core shell is prone to cracking. The electric core shell comprises a first side wall, a second side wall and an explosion-proof valve. The first side wall and the second side wall are connected and surrounded to form a containing cavity for containing the electric core. The wall thickness of the first side wall is smaller than the wall thickness of the second side wall. The second side wall is provided with a mounting groove penetrating through the second side wall. The explosion-proof valve is arranged in the mounting groove. Therefore, the overall wall thickness of the shell is ensured without affecting the energy density of the electric core. The welding strength between the explosion-proof valve and the shell is improved. The welding seam between the explosion-proof valve and the shell caused by the too small wall thickness of the shell can be effectively avoided.

The invention belongs to the field of constructional engineering, and provides a construction method suitable for a concrete filled steel tube batter post and a tower crane wall-attached joint, which comprises the following steps: S1, positioning a mounting area of a lug plate support; s2, a lug plate support is welded; s3, the three attached supporting rods are movably hinged to the lug plate supports through pin shafts; s4, the three attached supporting rods are arranged on the same horizontal plane in a radial mode; s5, a universal pin shaft is hinged to a lug plate support; s6, hydraulic adjusting bolts are arranged; s7, measuring the perpendicularity of the tower body; and S8, inspecting. Compared with the prior art, the device has the advantages that the arc-shaped lug plate supports can be flexibly matched according to the actual diameter of the concrete filled steel tubular column, the adaptation flexibility is improved, and the device is suitable for various super high-rise building outer frame structural forms; a three-dimensional adjustable inner supporting system is formed, it is ensured that the wall attaching device is tightly attached to the main chord member of the tower body, and the installation precision and the stress uniformity are remarkably improved.

The present invention discloses a mud pipe assembly for a horizontal directional drilling rig, which belongs to the technical field of pipe joints. A transition pipe is provided at the right end of the flange, and a positioning boss is provided at the right end of the transition pipe; the left end of the horizontal pipe is inserted into the positioning boss; an arc-shaped welding boss with an arc-shaped surface is provided at one end of the connecting joint, and the inner side of the arc-shaped welding boss has an anti-wear inner cylindrical tube integrated with the connecting joint; a sealing plate is welded at both ends of the vertical pipe, and the inner side of the sealing plate has a plurality of fan-shaped reinforcing ribs evenly distributed around the center of the sealing plate. The flange and the positioning boss of the present invention are formed into one body with a transition pipe, which avoids the flange surface being affected by welding thermal deformation during welding and solves the hidden danger of mud leakage; the anti-wear inner cylindrical tube of the connecting joint is inserted into five distribution holes, which has the effect of preventing the granular substances in the mud from wearing the inner wall of the weld, and the sealing plate is provided with evenly distributed anti-wear reinforcing ribs, which also play an anti-wear role on the weld and avoids weld cracking after long-term work.

The utility model provides a kind of sealing assembly, electric drive assembly and vehicle, it is related to vehicle technical field, sealing assembly includes output shaft and plugging piece, the output shaft is equipped with the shaft hole being penetrated along its axial direction and being used to with half shaft plug-in cooperation, the plugging piece is located in the shaft hole, and with the hole wall of the shaft hole sealing connection, and the plugging piece is equipped with annular groove, the annular groove is set to the axial end surface of the plugging piece and extends along the circumference of the plugging piece.This way, when plugging piece and the hole wall of shaft hole are welded using for example electron beam welding, plugging piece can be deformed under the action of annular groove, to offset the welding stress that plugging piece is subjected to in welding process to the base material stretch, so that welding crack can be prevented, improve weld quality, to ensure that output shaft has reliable self-sealing performance.

The application discloses a kind of shallow slot type integral tramway turnout wear-resistant guard rail and processing method thereof, guard rail includes straight guard rail and curved guard rail, both guard rails adopt channel steel, wear-resistant strip is fixedly arranged on the rail lip plane of channel steel rail, the starting point of wear-resistant strip is 390-395mm from guard rail front end, the top surface of starting end and end of this wear-resistant strip has excess section, the wear-resistant strip is arranged on the rail lip of guard rail, and it is compatible with existing guard rail pad and fastener, with high strength, good wear resistance, reduce maintenance workload, prolong service life.Processing the guard rail, first, positioning step is processed on rail lip plane, and positioning groove on wear-resistant strip is simultaneously processed, then welding, preheating before welding, and machining after welding to determine final size, the processing method has short technological process, simple operation and few steps, can avoid the generation of welding crack, and wear-resistant strip and steel rail are combined firmly, with good durability, not easy to weld off, with long service life.

This invention provides a fixing device for a receiver tube panel and a tower-type solar thermal power plant. The fixing device for the receiver tube panel includes: a connecting frame; at least one connecting component for connecting all the receiver tubes to the connecting frame; a support frame disposed on the connecting frame, the support frame having at least one fixing hole and at least one thermal expansion compensation hole; the thermal expansion compensation hole is used for at least a portion of the tube panel connecting component assembly to pass through and flexibly connect with the receiver tubes through the tube panel connecting component assembly, and the fixing hole is used for at least a portion of the tube panel connecting component assembly to pass through and rigidly connect with the receiver tubes through the tube panel connecting component assembly; wherein, after being heated, the support frame can have thermal expansion displacement relative to the tube panel connecting component assembly along a first direction and / or along a second direction through the thermal expansion compensation hole. The technical solution of this invention solves the problem in the prior art where thermal expansion of the support structure on the back of the receiver tube panel causes irreversible bending deformation of the tube edge tubes.