755results about "Workpiece edge portions" patented technology

The invention relates to the field of firefighting pipeline welding, in particular to a building firefighting pipeline welding device which comprises a mounting frame, a driving unit, an electric pushing frame, an electric control rotating roller, a welding head, a bearing plate I, an electric pushing rod I, a mounting plate, a mounting column and the like. A driving unit is mounted on the mounting frame; a plurality of electric pushing frames are arranged in the mounting frame; electric control rotating rollers are mounted on all the electric pushing frames; the system further comprises; a bearing plate I is mounted on the driving unit; a plurality of electric push rods I are fixedly connected to the bearing plate I; telescopic parts of all the electric push rods I are jointly and fixedly connected with a mounting plate, and a welding head is mounted on the mounting plate; and the bearing plate I is fixedly connected with a plurality of mounting columns. Chamfering treatment is carried out on the butt joint of the fire fighting pipelines, when the welding head moves the empty groove of the fire fighting pipelines, welding materials can better flow to the butt joint of the fire fighting pipelines, and welding work of the fire fighting pipelines is better carried out.

The invention discloses a friction stir welding preparation method of a carbon nanotube reinforced aluminum steel composite plate and the composite plate. The friction stir welding preparation method comprises the following steps: welding an aluminum alloy base material and a steel base material by adopting friction stir welding; before friction stir welding, steps are machined on the upper end face and the lower end face of the butt joint face of an aluminum alloy base material and the butt joint face of a steel base material in advance respectively, the butt joint face is machined to be in a sawtooth shape, the aluminum alloy base material and the steel base material form the complete steps, and the butt joint face of the aluminum alloy base material and the butt joint face of the steel base material are tightly meshed. Carbon nanotube coatings are respectively laid on an upper complete step and a lower complete step formed by the aluminum alloy base material and the steel base material in advance; a stirring needle of a friction stir welding tool adopted by the friction stir welding technology is machined into a sawtooth shape matched with the butt joint face in advance. The composite board has higher performance in the aspects of connection strength, toughness and the like, and when the composite board prepared through the method is applied to shipbuilding and ocean platform construction, hidden danger of safety construction can be avoided, and the construction efficiency is improved.

The invention relates to the technical field of brazing, discloses a sapphire light window and metal packaging brazing device and method, and solves the problems that the acting force among a metal cavity, a sapphire light window and a welding flux is inconvenient to adjust according to actual requirements, and the application range is relatively small, the sapphire light window and metal packaging brazing device comprises a supporting box, and a plurality of pressing discs are arranged above the supporting box; a supporting seat is arranged below the pressing disc, the supporting seat and the supporting box are fixedly connected through a plurality of supporting columns, a containing groove matched with the pressing disc is formed in the top of the supporting seat, a first through hole is formed in the inner wall of the bottom of the containing groove, and a first rotating shaft rotationally connected penetrates through the supporting box; according to actual requirements, the pressing force of the pressing disc can be adjusted through the damping pressing adjusting assembly, then the acting force among the metal cavity, the sapphire light window and the welding flux is controlled through the pressing disc, packaging brazing can be conducted on multiple sets of sapphire light windows and metal, the application range is widened, and the brazing efficiency is improved.

The invention provides a friction welding method and a connection structure. A conical bonding pad connects a far-end component and a near-end component with a conical hole for accommodating the conical bonding pad; the method comprises the following steps: clamping the clamping end; during primary forging, the clamping device is controlled to drive the conical bonding pad to rotate for the primary forging time length at the primary forging rotating speed, the pressure jacking device jacks the contact end towards the direction of the far-end component at the primary forging pressure, and the bonding pad rubs against the far-end component; the initial forging rotating speed is 5%-45% of the theoretical range, the initial forging pressure is 55%-95% of the theoretical range, and the initial forging duration is 5%-45% of the theoretical range; during finish forging, the rotating speed of the clamping device is controlled to be zero, the pressure jacking device jacks the conical bonding pad towards a far-end component for finish forging duration and extrudes melt under finish forging pressure, the finish forging pressure is larger than the initial forging pressure, the welding power is reduced in a low-speed short-time and certain-high-pressure mode, the welding equipment is made to meet the requirements for miniaturization and light weight, field operation can be conducted, and the welding efficiency is improved. The melt is extruded from the side face of the conical bonding pad, impurity discharge is promoted, and the welding quality is improved.

The present invention provides a strip steel rolling welding device, comprising a strip steel limiting assembly, a strip steel power assembly, a strip steel outer edge shaping assembly, a rolling device, a round tube heating assembly, an opening shaping assembly, a straight seam welding assembly and a weld scar cutting assembly, which are sequentially arranged. The strip steel outer edge shaping assembly is used to cut the two side edges of the strip steel into oppositely arranged grooves. The strip steel rolling welding device described in the present invention can cut the two side profiles of the strip steel into opposite grooves through the strip steel outer edge shaping assembly. After rolling, the two grooves fit together, and then the fitting grooves are melt-welded by the straight seam welding assembly. During welding, the strip steel body located at the upper groove position is used to release the welding material for molten welding, and the strip steel body located at the lower groove position is used to receive the molten welding material. The molten welding material is self-gathered in the weld seam by gravity and surface tension to ensure the welding quality, and can reduce or avoid the weld scar inside the welded pipe, thereby improving the forming quality.

The invention provides a strip steel edge rolling and welding device which comprises a strip steel limiting assembly, a strip steel power assembly, a strip steel outer side line shaping assembly, an edge rolling device, a round pipe heating assembly, an opening shaping assembly, a straight seam welding assembly and a crator cutting assembly which are sequentially arranged. The strip steel outer side line shaping assembly is used for cutting side lines on the two sides of strip steel into oppositely-arranged grooves. According to the strip steel edge rolling welding device, profiles on the two sides of strip steel can be cut into opposite grooves through the strip steel outer side line shaping assembly, the two grooves are matched after edge rolling, and then the matched grooves are subjected to fusion welding through the straight seam welding assembly; during welding, the strip steel body located at the upper groove position is used for releasing welding materials for fusion welding, the strip steel body located at the lower groove position is used for bearing the fused welding materials, and the fused welding materials are automatically gathered in a welding seam through gravity and surface tension so that the welding quality can be guaranteed, welding scars in a welded pipe can be reduced or avoided, and the forming quality can be improved.

The invention provides a Q890qE and Q420qE bridge steel flat butt joint combined welding method which comprises the following steps: step 1, grinding and derusting grooves of upper and lower asymmetric double-sided V-shaped joints to expose metallic luster; 2, preheating is conducted in an electric heating mode; 3, a solid welding wire CO2 gas shielded welding is adopted for backing welding of one weld joint on the upper V-shaped deep groove side; 4, welding seams are filled in the side of the V-shaped deep groove through submerged arc automatic welding, and the filling thickness is about 1 / 2 of the groove depth; 5, back gouging is conducted on the back face through carbon arc air gouging, and a carburized layer is polished and cleaned till metallic luster is exposed; 6, the V-shaped shallow groove is welded and filled; seventhly, the submerged arc automatic welding continues to weld the remaining weld joints of the V-shaped deep groove till the remaining weld joints are filled; and 8, postweld heat treatment is conducted. According to the method, a combined welding method of solid welding wire CO2 gas shielded welding bottoming, submerged arc automatic welding filling and capping is adopted, the problems of welding cold cracking and early joint breakage of the dissimilar bridge steel are solved by combining joint design, and the mechanical properties of a welding seam and a fusion area meet the standard requirements.

The invention relates to the technical field of welding, in particular to a pressure vessel vertical girth welding device which comprises a base, a fixed rotating rod is fixedly connected to the top of the base, a supporting framework is rotatably connected to the surface of the fixed rotating rod, and a limiting sliding rod is fixedly connected to the top of the supporting framework. One end of the limiting sliding rod is fixedly connected with a motor set, and a front fixing frame, a rear fixing frame and a rotating base are movably inserted into the limiting sliding rod in a penetrating mode. According to the vertical girth welding device for the pressure vessel, the hydraulic push rod of the base can turn over the fixing device by an angle, so that the problems that the pressure vessel is large in size and heavy are solved, the pressure vessel can be conveniently placed, fixed, taken and carried when being horizontally placed, and the pressure vessel is lifted to a corresponding angle when being welded; the problem of circumferential welds of the pressure vessel is solved.

The invention relates to the technical field of welding processing equipment, and discloses a positioning welding tool for processing a solar photovoltaic support, the positioning welding tool comprises a base, a sealing cover is arranged on the base, and a sealed processing space is formed in the sealing cover and the base; and the opening door is arranged in the middle of one side of the sealing cover and used for a worker to feed in the photovoltaic support before machining and take out the photovoltaic support after machining is completed. By adding and arranging the preheating and slow cooling mechanism, before the solar photovoltaic bracket is welded, the mechanism uniformly preheats the welding end part of the bracket, so that the binding force between a zinc coating and a base material is weakened under the thermal action, and the subsequent efficient removal of the zinc coating on the surface of the bracket is facilitated; meanwhile, base material damage or zinc layer residue caused by forced stripping is avoided, the internal stress of the material can be preliminarily released in the preheating process, the deformation risk caused by shock heating in the welding process is reduced, and the geometric stability of the support structure in the machining process is ensured.

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.

An assembly and method for preparing a pipe elbow for welding. The assembly has a cone clamping sleeve assembly adapted to be inserted into an end of the pipe elbow and a faceplate assembly removably affixed to the cone clamping sleeve assembly. The cone clamping sleeve assembly has a face at one end thereof. The face has at least one locating hole and at least one screw hole. The faceplate assembly has at least one locating pin receivable by the locating hole of the cone clamping sleeve assembly. The faceplate assembly has a captive screw threadedly received by the screw hole. The faceplate assembly has at least a pair of centering pins positioned at diametrically opposed locations on a faceplate. The centering pins are radially adjustable and adapted to bear against an inner diameter of the end of the elbow.

The invention provides a welding sealing device and method for an in-service nuclear power plant low alloy steel pump case, the sealing device comprises a pump case side welding base, a heat shield side welding base and a sealing ring, the pump case side welding base comprises a first mounting part and a second mounting part which are arranged at an included angle; the first mounting part penetrates through a mounting gap between the pump shell main flange and the heat shield, and the second mounting part extends to the outer side of the mounting gap; the heat shield side welding base is arranged on one side, facing the second mounting part, of the heat shield; the two ends of the sealing ring are connected with the second installation part and the heat shield side welding base correspondingly so as to seal the installation gap. According to the low-alloy steel pump shell welding sealing device for the in-service nuclear power plant, one end of the shell side welding base and the pump shell main flange are in angle welding, the welding heat input amount is small, and the situation that the assembly of a main pump core bag and the pump shell is affected due to structural deformation caused by too large heat input in the welding process can be avoided.

A plant for manufacturing a large floater (10), in particular for wind farms, comprises a starting station (110), a forming station (120), an outlet bench (140), a milling station (150) and a calendering station (160). The calendering station (160) comprises a verticalization device (164) for arranging the sheet (130) in an upright manner, and a vertical-axis calender machine (166) for bending the upright sheet (130) and forming a collar (170) for the floater (10) with vertical axis. The inner side surface of the collar corresponds to the planar face of the sheet.

The heat transfer tube (1A) is provided with a flared section (30) having a ball band shape in which the inner diameter of the distal end is larger than the inner diameter of the proximal end. A pipe to be connected passes through the flared portion (30). The flared portion (30) is connected to the pipe by a brazing material filled in a gap between the pipe and an inner wall of the flared portion itself.

The skeleton member includes a cut and a welded portion, and the cut is formed in the skeleton member and extends along the ridge line so that the ridge line is exposed. In addition, in the welded portion, the skeleton member is welded to the skeleton member along the cut along the ridge line by fillet welding. In this way, no welded portion is provided on the ridge line. Since the rigidity in the ridge line portion is higher than the periphery and the shared load is also large, it is possible to reduce cracking starting from the ridge line portion by not providing the welded portion in the ridge line.

The present invention addresses the problem of suppressing a facture such as a crack in press forming of an integral blank formed while a plurality of partial blanks partially overlap and has an objective to provide such a blank (integral blank).　The present invention provides a method for manufacturing an integral blank for press forming obtained by joining a plurality of partial blanks formed from steel sheets and having an overlap section where at least two partial blanks are partially overlapped. The method comprises obtaining, in advance, material inflow amounts (movement vectors of points on each partial blank) of the partial blanks due to press forming in the overlap section, manufacturing the blank for press forming by joining the partial blanks forming the overlap section only in a portion where the absolute value of a difference in material inflow amount (movement vector) between the partial blanks is smaller than a predetermined limit value, and, after hot press forming of this blank, joining another portion of the overlap section to obtain the desired press-formed part.

An electric resistance welded pipe or tube comprises a weld portion in a pipe or tube longitudinal direction, wherein a maximum value of a wall thickness distribution of the weld portion is less than or equal to 1.05 times an average wall thickness of the electric resistance welded pipe or tube, a width of a weld metal in the weld portion in a circumferential direction is 1 μm or more and 800 μm or less over an entire thickness of the electric resistance welded pipe or tube, and a ratio of a maximum value to a minimum value (=maximum value / minimum value) of the width of the weld metal is 1.0 or more and 2.5 or less.

The invention provides a vertical position welding method for bridge steel. The vertical position welding method comprises the steps that 1, a groove is manufactured, specifically, the X-shaped groove without a truncated edge is manufactured in a vertical position mode through a flame cutting technology; and the groove is polished and derusted according to requirements. 2, preheating, wherein the bridge steel is preheated to 75 DEG C in an electric heating mode; and 3, welding, wherein solid welding wire argon-rich mixed gas shielded welding is adopted for vertical position welding. And 4, post-weld heat treatment is conducted, specifically, after welding is completed, post-heat treatment is conducted at 200-250 DEG C through a crawler-type heater, and slow cooling is conducted to the room temperature after heat preservation is conducted for 3 hours. By researching and developing a welding material and a welding process matched with the Q890qE high-strength bridge steel, the technical problem of quality of a Q890qE vertical position butt welding seam is solved. Welding forming is stable, efficiency is high, deformation is small, the appearance is good, strength and weather resistance are balanced, the service life is long, and economical efficiency and environment friendliness are both considered; the method is especially suitable for engineering scenes with strict requirements on strength, toughness and durability such as long-span bridges and alpine region bridges, and has remarkable economic advantages and social value.

The invention discloses a large-pipe-diameter nickel base alloy composite pipe welding method and an auxiliary device.Each composite pipe comprises a composite layer and a base layer covering the composite layer in a sleeving manner, the welding method comprises the following steps that firstly, the to-be-welded ends of two sets of composite pipes are machined, X-shaped grooves are formed in the positions of the to-be-welded ends of the two sets of composite pipes, and the to-be-welded ends of the two sets of composite pipes are welded; then the X-shaped groove is polished through an auxiliary device; secondly, the two sets of composite pipes are assembled in a butt joint mode, and a base layer is welded according to the sequence of bottoming, filling and capping; and thirdly, the transition layer and the composite layer are sequentially welded according to the bottoming, filling and covering sequence. According to the method, the X-shaped groove is adopted, the double-face welding mode is adopted, argon gas back face protection is not used in the whole welding process, compared with a traditional welding method, the welding material cost is saved, the welding work efficiency is improved, a large amount of argon gas is saved, the welding steps are simplified, the welding material cost is low, the number of welding layers is small, the construction period is shortened, and energy conservation and emission reduction are achieved.

The invention relates to a method for manufacturing a cell housing (2) for a battery cell (1) of a traction battery for a motor vehicle, wherein the cell housing (2) has a circumferentially enclosed interior (3) and openings (8) on opposite sides that can be closed by means of housing covers (9). It is provided that the cell housing (2) is manufactured by roll forming, wherein, prior to roll forming, a wall thickness of the cell housing (2) is locally reduced and / or at least one recess (13, 22, 24, 26) is produced in a housing wall (4, 5, 6, 7) of the cell housing (2). The invention further relates to a cell housing (2) for a battery cell (1) of a traction battery for a motor vehicle.

The utility model discloses a hollow shaft blank friction welding port which comprises a first hollow shaft and a second hollow shaft, the end face of the first hollow shaft is a first welding face, the end face of the second hollow shaft is a second welding face, the first welding face corresponds to the second welding face, a first prefabricated groove is formed in the inner circumference of the first welding face, and a second prefabricated groove is formed in the inner circumference of the second welding face. A first prefabricated groove is formed in the inner circumference of the first welding face, a second prefabricated groove is formed in the inner circumference of the second welding face, the first prefabricated groove corresponds to the second prefabricated groove, and through the asymmetric structure of the first prefabricated groove and the second prefabricated groove, different first hollow shafts and second hollow shafts are correspondingly adjusted in a targeted mode. The inner circumferential diameter of the plastic metal and the inner circumferential diameter of the second hollow shaft are kept consistent, the plastic metal is prevented from protruding to form large flashes, the speed that the plastic metal on the two sides is converted into high circumferential expansion due to opposite pressure in the friction heat production stage is effectively reduced, and the filling rate of the plastic metal is improved.

To provide a method for producing welded steel blank (1).SOLUTION: This method comprises butting and joining sheets (2) using a filler wire (20) so as to produce a welded joint (22) having an aluminum content AlWJ included between 0.1 wt.% and 1.2 wt.%, each being provided with a steel base material (3) having a precoating (5) on each of two main surfaces (4) and each sheet (2) being provided with a removal zone (18) from which the precoating (5) is removed by a removal rate at a welded edge on each main surface (4). The composition of the wire (20) and the ratio of the added wire (20) are set such that the welded joint (22) has (a) a hardening coefficient FTWJ and (b) AlWJ has a nickel content NiWJ≤14-3.4xAlWJ and a chrome content CrWJ≤5-2xAlWJ which are aluminum contents of the welded joint (22).SELECTED DRAWING: Figure 4

A method for improving the welding performance of an aluminum alloy thick plate comprises the following steps that a Y-shaped groove is formed in an aluminum alloy plate, and the Y-shaped groove is provided with N steps; rectangular pulse wave TIG welding is adopted for conducting backing welding on the truncated edge of the bottom of the Y-shaped groove; carrying out cladding on the side part of the groove by adopting rectangular pulse wave TIG (Tungsten Inert Gas) welding; the groove is subjected to filling welding through direct current TIG welding, and after the step position of each step is completely covered, next filling welding is conducted; by adopting the welding method for welding the thick aluminum alloy plate and adopting a multi-pass welding mode, the effect of solid solution strengthening on a welding line of the last pass is achieved, a large amount of heat input at a time is dispersed into multiple times of input, the effect of reducing the peak temperature of a material is achieved, and therefore the strength and the ductility of a connector are further improved on the whole.

A three-dimensional vapor chamber assembly structure includes a housing, heat pipes, a capillary member and a working fluid. The housing includes a first housing plate and a second housing plate, a cavity formed between the first and second housing plates, and through holes formed on the second housing plate. The heat pipe penetrates through the through holes and includes an open end having a flange formed thereon. The flange includes lateral and longitudinal surfaces. The lateral surface of the flange is attached to the second housing plate via a welding layer, and the longitudinal surface of the flange is attached to the second housing plate via a welding product. The capillary member is arranged inside the cavity and attached to the housing. The working fluid is arranged inside the cavity. Accordingly, a firm and robust vapor chamber structure capable of preventing welding material from entering the cavity is achieved.

A method of manufacturing a cylindrical cargo container includes: providing a plurality of rigid panels together formable into a cylindrical shell; forming a first semi-cylindrical shell from a first set of the panels; forming a second semi-cylindrical shell from a second set of the panels; forming the cylindrical shell from the first semi-cylindrical shell and the second semi-cylindrical shell; forming a collar conformably encircling the cylindrical shell; constricting the collar to compress joints formed at abutting edges of pairs of adjacent panels; rolling the cylindrical shell and collar to bring respective joints of pairs of panels to a lower position, and welding an inside seam of the joint when at the lower position; removing the collar from the cylindrical shell; and rolling the cylindrical shell to bring respective joints of pairs of panels to an upper position, and welding an outside of the joint when at the upper position.

The utility model provides girth welding equipment integrated with an induction preheating and stress relief mechanism, which relates to the technical field of girth welding and comprises a worktable, a sliding rail is arranged at the top of the worktable, and a driving tailstock and a rotary clamping mechanism are arranged on the rail in a matching manner to realize coaxial clamping of workpieces; the side face of the workbench is slidably connected with a movable supporting table, the top of the workbench is provided with a supporting column and an induction preheating device, the supporting column is adjustably connected with a welding device and a stress relief device, and the welding device, the stress relief device and the movable supporting table synchronously move along with the movable supporting table. During working, a workpiece is firstly clamped and welded after induction preheating, stress is finally relieved in real time, and the rotary clamping mechanism drives the workpiece to rotate. The device integrates multiple functions, solves the problem of process dispersion of traditional equipment, prevents cracks through accurate preheating, relieves stress in real time, improves stability, and guarantees welding precision through coaxial clamping.

A closed socket brazed joint assembly includes a first member, a second member with a first end having first and second faying surfaces, a socket in the first member that receives the second member with a faying surface with at least two portions separated by a first fillet. Before application of energy to the joint, there is a gap between the faying surfaces of the first and second members. A slug of brazing fill material is between the first end of the second member and at least one faying surface of the socket. Upon application of energy, the brazing fill material melts and flows from between first end of the second member and the at least one faying surface of the socket to fill the gap between the faying surfaces of the first and second members.

The invention relates to a method for producing a workpiece (10) having a chamfer (20), in which a good part (18) is separated from a scrap skeleton (14) by cutting a blank (16) using at least one laser beam, the good part (18) is cut into a waste part (12) and into the workpiece (10) by means of the laser beam for production of the workpiece (10), whereby the chamfer (20) is formed, wherein, before complete separation from the workpiece (10), the waste part (12) is secured (24) to the workpiece (10) and / or the scrap skeleton (14), in a region that is already separated from the workpiece, by means of at least one welded joint (24).

The invention relates to a welding method based on a groove reconstruction strategy. A process pipeline is used for being installed on a rotary table of a positioner, a welding robot is electrically connected with a controller through a control device, the positioner is electrically connected with the controller, and a tracking sensor is arranged at the tail end of a mechanical arm of the welding robot and fixedly connected with a welding gun on the welding robot. The tracking sensor is electrically connected with the controller; the welding method comprises the steps that a groove of the process pipeline is reconstructed through the controller; the multi-layer and multi-pass welding is planned through the controller; backing welding is conducted on the groove of the process pipeline; after backing welding is completed, multi-layer and multi-pass welding is conducted on the groove of the process pipeline; through groove reconstruction and conversion between the weld joint section and the laser plane feature points, the influence of coaxiality errors, ovality errors, groove cutting errors and installation errors of the process pipeline on the welding quality is better reduced, meanwhile, the influence of pipeline thermal deformation on the welding quality in the welding process is solved, and the welding precision and the weld joint quality are improved.

The invention discloses a preheating-free thick plate narrow-gap laser welding defect control method which comprises the following steps: S1, designing single-side or double-side narrow-gap grooves for thick plate workpieces with different thicknesses, machining the grooves in a machining manner, polishing and cleaning a to-be-welded area, and performing butt joint assembly and spot welding fixation on the grooves and the to-be-welded area; s2, a wire heating device is additionally arranged on the wire feeding mechanism, the positive electrode of the wire heating device is connected with a welding wire, and the negative electrode is connected with base metal; a wire feeding mechanism, a laser heat source and a shielding gas system are sequentially arranged in the welding direction. S3, a welding wire is preheated, the welding wire extends into the bottom of the groove and is centered, the total power of point ring laser, the point ring ratio, the swing mode, the swing amplitude and the swing frequency are adjusted, and backing welding and filling welding are carried out; s4, heat preservation after welding; s5, carrying out nondestructive testing; according to the thick plate narrow-gap welding process, by means of swing point ring laser matching, middle point laser wire fusing and outer ring laser swing defect control are achieved, and the common defects that the side wall of a narrow gap is not fused, cracks exist, and air holes exist are overcome.