40results about How to "Reduce welding stress" 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 solar cells, and particularly discloses a back contact cell, a back contact cell string, a cell assembly and a photovoltaic system. The back contact cell is provided with a first area and a second area along a second direction; the first area is internally provided with first grid lines and second grid lines which are alternately arranged in the second direction, and first Pad points and second Pad points which are alternately arranged in the first direction, and the second area is internally provided with third grid lines and fourth grid lines which are alternately arranged in the second direction, and fifth grid lines and sixth grid lines which are alternately arranged in the first direction. The fifth grid line and the sixth grid line extend in the second direction and have discontinuous areas, the fifth grid line is arranged on the extension line of the first main grid in the second direction, and the sixth grid line is arranged on the extension line of the second main grid in the second direction. When the back contact battery is tested, the test difficulty is reduced, and the test reliability and stability are improved.

The invention belongs to the technical field of metal part machining equipment, and particularly relates to a metal part welding device which comprises a straight seam welding machine body, a linear driving assembly and a connecting plate, and a fixing assembly is arranged at the left end of the straight seam welding machine body; the welding mechanism comprises a mounting seat mounted on the connecting plate, and a welding head is mounted on the mounting seat; the auxiliary mechanism comprises an air injection part rotationally arranged on the outer ring of the welding head, and a driving part and a cooling part are further fixedly installed on the welding head; and the preheating mechanism comprises a gas conveying part arranged on the side face of the straight seam welding machine body, plugging parts are arranged on the top face of the straight seam welding machine body in an array distribution mode, and a control part is arranged on the mounting base. By integrating inert gas protection, efficient cooling and intelligent preheating functions, the welding quality and production safety are remarkably improved, and meanwhile the high-precision and efficient automatic welding process is achieved.

The invention relates to a welding method of a Q370qENH + S32168 weather-resistant stainless steel composite steel plate. Comprising the steps that the butt joint position of two to-be-welded weather-proof stainless steel composite steel plates is machined into inclined faces, the inclined faces of the butt joint position are spliced into a V-shaped opening, a splash-proof protection belt is pasted, a ceramic liner is placed, base layer bottoming welding is conducted, base layer filling welding is conducted, transition layer welding is conducted, and composite layer welding is conducted. According to the method, it is guaranteed that a welding seam of a base layer base layer welding layer has good weather resistance and mechanical performance, and it is guaranteed that the corrosion resistance of the welding seam is matched with that of a Q370qENH weather-resistant steel base layer; the welding thickness of the transition layer welding layer made of dissimilar materials is controlled, the non-uniformity of the structure of the transition position is improved, the welding stress is reduced, embrittlement and crack generation of the transition layer welding layer are prevented, and it is guaranteed that the transition layer welding layer has excellent plasticity and toughness; and the corrosion resistance requirement of the welding layer of the composite layer is ensured.

The invention discloses cutter handle resistance welding equipment and a welding process, and relates to the technical field of PCB cutter machining. The device comprises a welding table, machining bases, vibration discs, a heating box and a grinding mechanism, the two machining bases arranged in a mirror image mode are fixed to the table top of the welding table, the vibration discs are fixed to the positions, located on the inner sides of the machining bases, of the table top of the welding table, and the heating box is fixed into a first groove, a second groove and a third groove which communicate with one another; and a group of uniformly distributed No.2 heating pipes are fixed in an inner cavity of each side box plate of the heating box. The preheating box is additionally arranged at the feeding part, the cooling speed after welding can be reduced, cracks are prevented from being generated, welding stress is reduced, welding defects are reduced, the workpiece quality is improved, excessive time and procedures are not consumed, the production efficiency is improved, in addition, after-heat treatment can be conducted on the welded workpiece, hydrogen escape is facilitated, delayed cracks are prevented, and the welding quality is improved. And the welding quality is further improved.

The invention relates to the technical field of hybrid welding, in particular to a laser and TIG magnetic control hybrid welding process for a nickel-based alloy pipe production line, which comprises the following steps: pipe manufacturing, preparation, conveying and preheating, welding and cooling, equipment comprises a dust-free welding chamber and a welding pipe, a welding mechanism is arranged in the dust-free welding chamber, and the welding pipe is arranged in the dust-free welding chamber. The welding mechanism comprises a high-frequency pulse TIG welding gun and a laser transmitter, a magnetic field mechanism is arranged in the high-frequency pulse TIG welding gun, and a tungsten electrode end is arranged at the end, away from the adjusting frame, of the high-frequency pulse TIG welding gun. The method has the advantages that optical fiber laser welding is combined with the high-frequency pulse TIG arc and external alternating magnetic field technology, the welding speed is remarkably increased, rapid heating is achieved through optical fiber laser welding, the stirring and mixing effects of a molten pool are enhanced through adding of the high-frequency pulse TIG arc and the alternating magnetic field, the alternating magnetic field stirs the interior of the molten pool, grains are refined, and the overall performance of a welding seam is improved; therefore, thermal stress and deformation of weld metal are reduced, and welding efficiency and quality are improved.

The utility model relates to the technical field of batteries, in particular to a cylindrical battery roll core structure, which comprises a roll core piece and a tab, the tab is connected to the axial end of the roll core piece, an indentation groove is arranged on the tab, the indentation groove extends along the direction perpendicular to the axis of the roll core piece, and the indentation groove extends along the direction perpendicular to the axis of the roll core piece. The plurality of indentation grooves are arranged along the axial direction of the core rolling piece; the indentation grooves extend in the direction perpendicular to the axis of the core rolling piece, namely, the indentation grooves extend in the length direction of the tabs, so that the indentation processing mechanism compresses and processes the tabs into the indentation grooves; the plurality of indentation grooves are arranged along the axial direction of the core rolling piece, and the arrangement of the indentation grooves enables the tabs at the end parts of the core rolling piece in the axial direction to be bent from the creases more easily when the tabs are kneaded, so that the required kneading force is smaller, and metal scraps generated during kneading are smaller; therefore, the welding stress between the tabs and the positive pole confluence plate and the negative pole confluence plate is smaller.

The present invention relates to a welding device for processing door panels of new energy vehicles, comprising a base and a positioning plate fixedly installed on the top thereof, a partition plate fixedly installed on the middle part of the front side of the positioning plate, a flip plate hinged on the front end face of the partition plate, a limiting mechanism for fixing a door reinforcement plate is arranged on the flip plate, and a scraping mechanism for cleaning welding slag on the back side of the flip plate is arranged on the front side of the positioning plate on one side of the partition plate; two welding points of the door reinforcement plate are preheated by an electric heating block, thereby reducing welding stress and cracks generated by the door reinforcement plate and avoiding affecting its normal working efficiency; after the two welding points of the door reinforcement plate are preheated, nitrogen is passed through an air intake hose and two air jet pipes and then blown out from the two air jet pipes, thereby reducing the oxygen content around the two welding points of the door reinforcement plate, thereby reducing pores and slag inclusions occurring during welding, and improving the welding quality of the door reinforcement plate.

The invention belongs to the technical field of welding, and discloses a welding device special for circumferential welds.The welding device comprises a welding base, mounting frames are fixedly connected to the two sides of the welding base, a mounting block is fixedly connected to the top of the welding base, a limiting sleeve is fixedly connected to the middle section of the bottom of each mounting frame, and a push rod is slidably connected to the interior of each limiting sleeve. A rotary shaft rotates to drive an ejector rod to rotate, the ejector rod rotates to push a push rod to move to eject a first clamping block out of a limiting clamping groove, and when the ejector rod continues to rotate to be separated from the push rod, the first clamping block is matched with a short groove of the limiting clamping groove due to gravity and elastic force of a spring at the moment; due to the fact that the first clamping block and the limiting clamping groove are matched and enter the short groove from the long groove, the distance between the welding gun and the welding part is lengthened, the welding part is welded again, layered welding is achieved, the welding speed and the filling rate of the welding seam can be increased, the mechanical property of the welding seam is improved, and the corrosion resistance of the welding seam is enhanced.

The invention discloses an assembled steel-wood structure welding device with self-positioning, which relates to the technical field of welding and comprises a feeding system, an industrial robot and a frame, wherein the industrial robot is installed on one side of the frame, a welding gun is installed on the industrial robot, a sliding box is installed on the frame, a plurality of placement slots are sequentially arranged in the sliding box, a first spring is installed on one side of the placement slot, a light source is installed on each turn of the first spring, a telescopic plate is slidably installed on the upper side of the placement slot, a photoresistor plate is arranged on the inner wall of the placement slot and the lower side of the telescopic plate, the photoresistor plate is electrically connected to a control system, a conveying line is installed on one side of the sliding box, a rotating cylinder is installed on the conveying line, a connecting box is installed on the rotating cylinder, a bracket is installed above the connecting box, and a material unloading box is installed on the lower side of the bracket; the placement slot is used to place steel-wood A, the photoresistor plate detects steel-wood A, and the industrial robot and the welding gun cooperate to realize the welding of steel-wood A and steel-wood B.

The invention discloses a columnar component butt-joint assembly system which comprises a welding device, a butt-joint assembly device, a butt-joint assembly device and a butt-joint assembly device, and the welding device is used for welding a first component and a second component to form an integral component; the calibration device is arranged on one side of the welding device and used for adjusting the position of the first component; the calibration cabin is arranged on the other side of the welding device and used for adjusting the position of the second component; the propelling device is used for changing the position of the second component in the calibration cabin; and the carrying device is used for feeding of the first component and the second component and discharging of the whole component, the calibration cabin comprises a bottom cabin body and sealing doors hinged to the two sides of the bottom cabin body, the sealing doors are connected with door body driving mechanisms, the sealing doors and the bottom cabin body are combined to form a heat preservation cavity, and the heat preservation cavity is used for containing the welding position of the whole component. The problems that existing butt welding equipment is complex in control and low in welding quality are solved. Welding and heat preservation are integrated, heat preservation treatment can be conducted immediately after welding is completed, and the welding quality is guaranteed.

The invention discloses a novel hinge expansion joint for high-temperature flue of flue gas turbine, comprising: end pipe I, end pipe II, bellows, load-bearing frame I, load-bearing frame II, two sets of hinge mechanisms and eight sets of supporting components; end pipe I, bellows and end pipe II are connected in sequence; load-bearing frame I is located at the side of end pipe I and supports end pipe I through four sets of supporting components; load-bearing frame II is located at the side of end pipe II and supports end pipe II through another four sets of supporting components; two sets of hinge mechanisms are installed between load-bearing frame I and load-bearing frame II. The invention ensures the long-term operation of the expansion joint under high-temperature working conditions and improves the service life of the product.

The utility model discloses a multi-box single-chamber steel box girder machining and manufacturing device which comprises a plurality of box bodies, the box bodies are of independent structures, the cross sections of the box bodies are of trapezoidal structures with the wide upper portions and the narrow lower portions, decorative arc plates are welded to the surfaces of the outer sides of the box bodies, and the decorative arc plates are welded to the surfaces of the outer sides of the box bodies. When a steel box girder is machined, the web plate, the decorative partition plate and the top plate are welded on the plane in advance, an overhead welding seam and a vertical welding seam are effectively converted into a flat welding seam, the welding difficulty is reduced through the improved welding method, the welding quality is remarkably improved, and the welding quality is improved. Due to the fact that flat welding seams are easier to control, the possibility of welding defects and welding stress is greatly reduced, the overall structural strength and safety of the steel box girder are improved, in addition, through plane welding, the skill requirements for welding workers can be reduced, the production efficiency is improved, and the labor cost is reduced.

The present invention discloses an electron beam welding method for a spatial intersecting structure of a pipe and a hyperbolic shell, which belongs to the field of welding of metal material structural parts, and specifically includes the following steps: S1: opening a hole in the hyperbolic shell; S2: pipe processing: the pipe can be prepared by forging processing or sheet rolling welding according to the thickness of the pipe wall; a process boss is set in the intersecting area of ​​the pipe and the hyperbolic shell; S3: intersecting structure assembly: assembling the pipe and the hyperbolic shell; S4: welding: performing zone welding according to the circumferential thickness curve of the intersecting weld to be welded. The present invention uses an electron beam welding method to design the welding area form of the pipe and the hyperbolic shell in a targeted manner and develop a welding process, and uses a vacuum electron beam welding process for welding of unequal thickness space welds in the intersecting area of ​​the pipe and the hyperbolic shell, which greatly improves the welding efficiency, is not prone to internal welding defects, and realizes high-quality, efficient and low-cost welding of the pipe and head plug-in welds on the end cover of a large-size titanium alloy heat exchanger.

This application discloses a method for improving the yield of hot-rolled titanium and titanium alloy plates, relating to the field of hot rolling processing of titanium and titanium alloy plates, including the following steps: Step 1, material head screening; Step 2, surface treatment of the material heads obtained in Step 1 by peeling, polishing or sandblasting and pickling; Step 3, material head welding; Step 4, material head rolling; Step 5, heat treatment of the finished plate; Step 6, surface treatment and slitting of the finished plate after heat treatment in Step 5 to obtain qualified finished titanium and titanium alloy plates. This invention solves the problem of easy breakage of traditional welds during hot rolling in the prior art, enhances the stability of the hot rolling process, reduces welding difficulty, simplifies the production process, improves the yield stability, and increases the product yield and production efficiency.

The welding clamp comprises a base, a supporting plate, two pressing mechanisms and a plurality of positioning mechanisms, the supporting plate is arranged above the base, the two pressing mechanisms are symmetrically arranged at the two ends of the supporting plate, and the positioning mechanisms are symmetrically arranged in the middle of the base; the pressing mechanism comprises a first air cylinder and a second air cylinder. The positioning mechanism comprises a clamping device and a positioning plate with a positioning hole. The welding method comprises the steps that A, a high-pressure oil pipe body and an assembly are installed on a welding clamp; b, the position of the assembly is limited through a positioning piece, and diagonal positioning of symmetrical holes is achieved; c, welding assemblies in the middle of the high-pressure oil pipe through laser welding, and then welding the assemblies from the middle to the periphery in a symmetrical welding sequence; and D, after welding is completed, the welded high-pressure oil pipe is taken out of the welding tool. Rigid constraint can be weakened, welding stress can be dispersed and reduced, and welding of the high-pressure oil pipe is simpler.

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.

The utility model discloses a contactor with good sealing performance, which comprises an upper shell, a frame sheet and a lower shell, the upper shell, the frame sheet and the lower shell are sequentially and hermetically assembled from top to bottom, the upper shell and the frame sheet are hermetically connected through plastic packaging glue, and the frame sheet and the lower shell are hermetically sewed and welded. According to the sewing welding mode, on one hand, the requirement for welding power is low, welding stress is relatively small, product deformation is small, influence on product mechanical parameters is small, on the other hand, the requirement for parts is not high, part machining difficulty is small, welding strength and product sealing reliability are improved, and the requirement for the planeness of the parts is not high; and a sealed environment is formed in the contactor, so that the air tightness is good, the oxidation of electronic components and parts in the contactor can be better protected, the stability of a contact resistor and the connection reliability of a product are kept, and the requirements of customers on protection conditions of a use environment of the contactor are met.

The invention relates to the technical field of building energy dissipation, and discloses a buckling-restrained brace device, a building structure and a mounting method of the building structure. The buckling-restrained brace device comprises a damping mechanism, a gusset plate and a connecting plate; a first containing cavity is formed in one end of the damping mechanism, a second containing cavity is formed in the other end of the damping mechanism, the gusset plate extends into the first containing cavity and is hinged to the damping mechanism, and the connecting plate extends into the second containing cavity and is welded to the damping mechanism. Meanwhile, overlarge stress at the weld joint can be avoided through hinge joint, only one end needs to be hinged and the other end needs to be welded during installation, installation is more convenient, the technical problems that in the prior art, weld joint stress is concentrated, breakage is prone to occurring, machining precision is high, and installation is complex are solved, and the purposes of reducing weld joint stress, being firmer in welding and improving welding quality are achieved. Meanwhile, the requirement for machining precision is low, and installation is easier.

The invention relates to the technical field of aviation aircraft engine part manufacturing, in particular to an aircraft engine stator blade forming manufacturing method which comprises the following steps of S1, pretreatment, S2, upsetting treatment, S3, primary defect treatment, S4, die forging treatment, S5, secondary defect treatment and S6, solid solution aging treatment. After the upsetting and die forging forming method is adopted, the mold filling property of the blade becomes good, the structure is uniform, and the production efficiency is high.

This invention discloses an automatic welding device for foot pedal brackets of new energy vehicles, belonging to the field of welding equipment technology. It includes a turntable, a welding robotic arm, a fixed base plate, a bracket positioning assembly, a gripper cylinder, a translation assembly, and a connecting arm; an mounting arm with a pressure roller mounting arm fixedly connected to one end, the pressure roller mounting arm being horizontally rotatably connected to a pressure roller. In this invention, the two mounting arms and the pressure roller move relatively close together, allowing the pressure roller to press down on the upper and lower tips of the arc-shaped notch of the bracket and forcibly straighten the tips, making the tips fit against the tubular part of the contour frame. Thus, during welding, after the tips melt, they can be fixed at the connection between the horizontal bracket and the tubular part of the contour frame, preventing gaps between the horizontal bracket and the tubular part of the contour frame. This avoids gaps or defects at the contact point between the contour frame and the horizontal bracket after welding, which would affect welding accuracy. It also reduces welding stress to some extent. Furthermore, by straightening the tips, interference with the welding robotic arm during welding is avoided.

A kind of low vacuum laser welding method for GH4169 high-temperature alloy and SS304 stainless steel, the present application belongs to laser welding technical field.The present application solves the problem that the existing welding method cannot realize the low-cost and high-quality connection of medium thickness and above GH4169 alloy and SS304 stainless steel.One, welding assembly;Two, low vacuum laser welding;Three, heat treatment.The present application is used for the low vacuum laser welding of GH4169 high-temperature alloy and SS304 stainless steel.

The application discloses a back contact photovoltaic module and a preparation method thereof. The method comprises the following steps: providing a cell piece and a solder strip; the cell piece is provided with a main grid; the solder strip is stretched, and tin paste is sprayed on one side surface of the solder strip; the tin paste sprayed on the solder strip is pre-solidified to connect the tin paste and the solder strip; one side of the solder strip, on which the tin paste is sprayed, is attached to the main grid of the cell piece and heated to remove the tin paste, so that the main grid of the cell piece and the solder strip are fixedly connected to form a cell string; and the cell string is encapsulated and laminated to form the back contact photovoltaic module. By pre-solidifying the solder strip with the tin paste, the tin paste is preliminarily solidified, the initial temperature difference between the solder strip and the cell piece is reduced, the welding stress is reduced, the probability of hidden cracks in welding is greatly reduced, and the performance of the photovoltaic module is ensured.

The invention discloses a reactor coolant loop and a mounting method thereof. The reactor coolant loop comprises a pressure vessel, a steam generator, a main pump, a hot section main pipeline and a cold section main pipeline. The end face of the steam generator inlet pipe nozzle is parallel to the end face of the steam generator outlet pipe nozzle, the end face of the pressure container inlet pipe nozzle is perpendicular to or parallel to the end face of the pressure container outlet pipe nozzle, and the end face of the pressure container outlet pipe nozzle is parallel to the end face of the steam generator inlet pipe nozzle. And when the main pipeline of the reactor coolant loop is installed and welded, the welding positions of four welding seams at the two ends of the hot-section main pipeline and the two ends of the cold-section main pipeline are in pipeline horizontal fixed butt joint. According to the technical scheme, the reactor coolant loop structure is simplified, the structural restraint degree is further reduced, the welding stress can be further reduced, construction is simplified, the cost is reduced, the construction period is shortened, and the safety and economical efficiency of nuclear power station construction and operation are improved.

The utility model relates to the field of steel structure building, and disclose a kind of steel bone and steel frame beam connecting joint, comprising: beam body, column and connecting component, the connecting component is connected at the position of the exterior of column near beam body connecting end part, the connecting component includes clamping shell, L type frame and limit plate, the clamping shell is connected with column, L type frame is set in the upper and lower ends of clamping shell;Adjusting screw is installed in the inside of L type frame by thread cooperation, the adjusting screw is rotatably connected with limit plate;First perforation is equidistantly opened in the end of beam body near column;Second perforation is equidistantly opened in the side of clamping shell near beam body.The utility model realizes the accurate adjustment of beam body by adjusting screw and limit plate cooperation, avoids repeatedly moving and quickly aligns perforation, solves the problem of difficult installation and low efficiency caused by traditional perforation deviation;Bolt and nut fix beam column, replace part of welding to reduce stress, avoid full-welding hidden danger, improve node stability and construction safety.

The invention relates to the technical field of metal welding, in particular to welding equipment for metal base material production, which comprises a base frame, clamping plates for limiting a metal base material are arranged on the two sides of the base frame, a moving frame sliding on the base frame through an electric sliding block is arranged below the clamping plates, and a flowing groove for fully exposing the welding position of the base material is formed in the middle of the base frame. The clamping plates are arranged in an L shape, so that the two base materials cannot deviate even if the two base materials bear the abutting force of the other base material during weld joint butt joint, the stability of the two base materials during follow-up welding is effectively guaranteed, smooth flowing of high-temperature gas near a weld joint during welding can be guaranteed through the arrangement of the flowing grooves, and the welding quality is improved. And when the containing box is driven by the driving part to continuously move to cover the recycling hopper, the sliding piece opens the recycling box when moving, welding slag collected in the recycling box falls into the recycling hopper at the moment, and manual operation is not needed when the welding slag is discharged.

The invention provides an X-ray tube anode target disc as well as a preparation method and application thereof. The X-ray tube anode target disc comprises a WRe-molybdenum alloy metal target material layer, a transition solder layer and a silicon carbide heat storage matrix which are sequentially compounded from top to bottom, the molybdenum alloy is selected from TZM, MHC and molybdenum lanthanum alloy; the transition solder layer is a Zr layer or a Ti layer; a non-welding surface of the silicon carbide heat storage substrate is provided with an aluminum oxide-titanium oxide blackening coating, and the room-temperature heat radiation coefficient of the aluminum oxide-titanium oxide blackening coating is 0.80 or above. The X-ray tube anode target disc has remarkably improved thermal performance, welding stability, mechanical performance and efficient thermal radiation heat dissipation performance.

The invention relates to a photovoltaic module structure and a production process, and belongs to the photovoltaic field, the photovoltaic module structure comprises a frame and a module body, the module body is arranged in the frame, and the module body comprises chemical tempered glass, a first adhesive film layer, a back junction back contact battery string, a second adhesive film layer and a glass fiber composite backboard which are sequentially arranged in the vertical direction; the surface of the chemical tempered glass is flush with the surface of the frame. According to the invention, chemical toughened glass is adopted, so that the anti-ultraviolet performance is high, the yellowing and powdering phenomena can be prevented, and the service life of the photovoltaic module is prolonged; the chemically-toughened glass has high strength and high impact resistance, and the glass fiber composite back plate also has high strength and rigidity, so that the problem that a light component is easy to cause subfissure of a battery piece when being impacted can be solved after the chemically-toughened glass and the glass fiber composite back plate are laminated with the back-junction back-contact battery string; the surface of the chemical tempered glass is flush with the surface of the frame, so that the dust accumulation prevention effect is achieved, and the dust accumulation condition is avoided.

The invention discloses a welding method of an elastic metal-plastic tile, belongs to the technical field of elastic metal-plastic tiles, and aims to solve the problems that the conventional welding method has the defects of high heat sensitivity, poor compatibility and the like and is difficult to meet the requirements of the conventional welding method. The method comprises a pretreatment step, namely fixing an elastic metal plastic tile and cleaning the surface of a base material; brazing filler metal is prepared, and low-melting-point brazing filler metal alloy containing active elements is selected; accurate temperature control heating is adopted, and a non-contact heating technology is adopted to ensure that the brazing filler metal is rapidly and uniformly melted and heat damage is minimized; the brazing process is optimized, welding seams are filled through the capillary action under vacuum or inert gas protection, and chemical bonding is promoted; and cooling solidification is conducted, the welding stress and deformation are reduced in a rapid cooling mode, and the welding quality is ensured.

The invention relates to the technical field of metal plate welding, in particular to a metal plate welding device for constructional engineering, which comprises a cabinet body, a welding mechanism is arranged at the upper end in the cabinet body, an adjusting mechanism is arranged at the position, close to the lower end, in the cabinet body, and a motor is fixedly connected to the position, corresponding to the adjusting mechanism, of the front end surface of the cabinet body. The motor is in transmission connection with the adjusting mechanism; the welding mechanism comprises a support fixedly connected to the center of the front side of the lower end face of the cabinet body, a first threaded rod is rotationally connected between the support and the inner wall of the cabinet body, the outer surface of the first threaded rod is in spiral transmission connection with a fixing plate, and guide rails are symmetrically fixed to the two sides of the fixing plate. The adjusting mechanism is designed to be matched with the welding mechanism, an aluminum alloy sheet can be supported and fixed after the aluminum alloy sheet is turned over by a specified angle through the adjusting mechanism, the welding angle of the aluminum alloy sheet is preset, the requirement of a user for different welding angles of the aluminum alloy sheet is met, and the welding efficiency is improved.