211 results about "Shot welding" patented technology

The invention relates to the technical field of image data processing and intelligent control, and discloses a patch board spot welding track intelligent control method and system based on visual perception. According to the method, synchronous image streams are collected through a binocular vision sensor, and epipolar correction image pairs are generated through timestamp synchronization, ROI extraction and epipolar correction processing; calculating a disparity map by adopting a stereo matching algorithm, and constructing a compensated three-dimensional point cloud model based on deformation vector field fusion multi-frame point cloud data of a radial basis kernel function; welding spot position error vectors are generated by extracting welding spot feature points and performing spatial filtering optimization; and carrying out inverse kinematics calculation on the mechanical arm by adopting a damping least square method, carrying out safety constraint optimization in combination with prospective collision risk assessment and real-time pose data, and generating a trajectory compensation instruction. According to the method, the problems of dynamic deformation compensation and motion safety in patch plate welding are solved, the submillimeter welding spot positioning precision is achieved, and the welding quality stability and the system robustness are improved.

A first member formed of a thermoplastic resin molding mixed with a fiber material and a second member formed of a molding containing at least a thermoplastic resin are welded by friction stir spot welding using a double-acting tool for friction stir spot welding. An overlapping part between the first member and the second member is formed, and the tool is disposed against the overlapping part while the pin and the shoulder are rotated about the rotation axis. The pin is plunged into the overlapping part, and friction stir is performed to cause extension fibers to remain around a plunging region of the pin while the shoulder is retracted to release an overflow material. The shoulder is brought closer to the overlapping part to wrap the extension fibers into the overflow material when the overflow material is backfilled while the pin is retracted from the overlapping part.

1. The name of the design product: graphical user interface (2) of welding system operation for electronic equipment. 2. The use of the design product: an electronic equipment. 3. The design points of the design product: the graphical user interface content. 4. The picture or photo that best shows the design points: design 1 front view. 5. The use of the graphical user interface: the interface of the design product is the operation and display interactive interface for the welding system; the front view shows the main interface; the column on the left side of the interface represents gas selection, and clicking on the different icons in this column can select different gases; the four icons arranged in a rectangle in the middle of the left side of the interface represent the welding wire diameter, and clicking on the different icons in this column can select different welding wire diameters; the column at the bottom of the left side of the interface from top to bottom represents the arc soft and hard adjustment function, the gas sending speed preset function, the front gas delay function and the rear gas delay function, and clicking on the different icons in this column can select different functions; the icon in the upper left corner of the middle part of the interface represents the AC 110V power indication; the icon in the upper right corner of the middle part of the interface represents the AC 220V power indication; the column in the middle part of the interface from top to bottom represents the temperature overheating indication, the voltage value and the current value; the column on the right side of the interface represents the welding mode, and clicking on the different icons in this column can realize different welding functions; the row at the bottom of the right side of the interface from left to right represents the non-self-locking function, the self-locking function and the spot welding function, and clicking on the different icons in this row can select different functions. 6. Design 1 is designated as the basic design.

The application discloses a kind of metal weld point shape detection methods, it is related to the field of welding shape identification, including the following steps: the sampling system of multi-angle progression and multi-angle collection weld point point cloud of weld point is constructed;First, establish main point cloud in main visual angle, and design algorithm to judge the quality of main point cloud, if main point cloud data is insufficient, continue to collect auxiliary point cloud from other angles, and then carry out secondary discrimination;According to the set characteristics of the sample to be detected, design a fast 3D point cloud fusion scheme;Finally, the morphology of the weld point is output by machine learning description.The application also discloses a kind of weld point post-weld quality detection and identification system, based on the above method, and the output weld point shape information is matched with standard qualified weld point, and the quality evaluation result of weld point is given in real time.The collection efficiency of the application is high, the interference of environmental influence and sensor noise can be effectively overcome, the accuracy and integrity of point cloud file are improved, and then the accuracy of neural network identification data is improved.

The invention discloses a welding tool and a welding method, and belongs to the technical field of welding equipment.The welding tool comprises a machining table and a welding execution module, a copper strip positioning module and a positioning seat are arranged on the machining table, a reciprocating part is installed on the positioning seat, and the copper strip positioning module is installed on the reciprocating part; a first motor is fixedly installed on one side of the positioning seat and used for driving the reciprocating part, a first contact wheel is installed on one side of the copper strip positioning module, a second contact wheel is installed on the supporting frame, and the first contact wheel is connected with the reciprocating part through a belt. The reciprocating piece is driven by the first motor to enable the copper strip positioning module to gradually move by a part of distance on the positioning seat, when the copper strip positioning module moves to the maximum stroke, the first contact wheel and the second contact wheel are in contact to drive the placing module to rotate, the copper strip located on the placing module moves along with the placing module, and synchronous feeding of the copper strip is achieved; and the welding execution module carries out ordered spot welding on the overlapped part.

This invention belongs to the field of iron and steel smelting technology, and particularly relates to a protective device and manufacturing method for a converter movable fume hood lifting lug. It includes lifting lugs and a movable fume hood. The lifting lugs are welded to the movable fume hood. A protective cover with an internal interlayer, matching the outer contour of the lifting lug, is hung on the outside of the lifting lug. The two sides of the interlayer of the protective cover are connected by ribs. Several V-shaped anchoring nails are welded to the interlayer wall of the protective cover. Refractory grout is filled into the interlayer of the protective cover. Asbestos is laid between the protective cover and the lifting lug. One end of the protective cover is welded to the movable fume hood. Several round rod hanging lugs are welded to both sides of the protective cover, and the upper ends of the round rod hanging lugs are hung on the lifting lugs. This invention isolates the lifting lug from the heat source through the protective cover, preventing the lifting lug from being burned. While the protective cover is fixed to the lifting lug and the movable fume hood, it reduces the contact area, thereby reducing heat transfer.

The invention provides automatic rose rolling equipment, and relates to the technical field of automatic equipment. The automatic rose rolling equipment comprises an equipment working panel and a rack, the equipment working panel is located at the upper end of the interior of the rack, a ribbon infinite rotating mechanism, a soldering iron cutting mechanism, a soldering iron spot welding mechanism and a horizontal twisting mechanism are sequentially arranged at the upper end of the equipment working panel, and the ribbon infinite rotating mechanism comprises a rolling mechanism fixing seat; the rolling mechanism fixing base is fixed to an equipment working panel through screws, and a rolling front-back moving module is arranged at the upper end of the rolling mechanism fixing base. According to the invention, by integrating the ribbon infinite rotation mechanism, the soldering iron cutting mechanism, the electric welding mechanism, the horizontal torsion mechanism and the like, the automatic production of the ribbon, colored ribbon and rose rolled flower is realized, the production efficiency is obviously improved, the stable and attractive product quality is ensured, the labor cost is reduced, the operation is simple and convenient, and the device is suitable for large-scale order production and has a good industrial application prospect.

The invention relates to the technical field of fan welding, in particular to a fan impeller welding device which comprises a welding manipulator and a rotating station and further comprises a supporting mechanism which is arranged on the rotating station and used for limiting and cooling blades spot-welded on a wheel disc. The arc-shaped plates are adopted for shielding and protecting the two sides of the welded blades, welding slag can be prevented from adhering to the wheel disc and the blades, then it is guaranteed that the quality of all the blades is consistent with the original design, the difficulty of later dynamic balance correction is lowered, meanwhile, the limiting plates can be used for clamping and limiting the blades during welding, and the welding efficiency is improved. According to the invention, the problems of deflection and deformation of the blade due to high temperature of welding are prevented, the balance design of the impeller is further ensured, the overall production efficiency of the impeller is indirectly improved, and the limiting plate is adopted for clamping the blade which is being welded, meanwhile, the blade can be protected, and welding slag is prevented from being adhered to other positions outside the welding point of the blade.

The invention relates to the technical field of aerospace material processing, in particular to a laser hybrid welding method for a pressure vessel lock bottom structure, which comprises the following steps: step 1, carrying out pre-welding treatment on a welded junction of the pressure vessel shell lock bottom structure; 2, the equatorial seam of the pressure container is assembled, and a mechanical arm multifunctional tool is adopted for fixed spot welding; 3, local preheating is conducted on a welding seam of the equatorial seam; fourthly, laser hybrid welding is conducted on the whole pressure container in a laser-TIG composite mode; and 5, after welding is completed, inspection and treatment are conducted. By means of the laser-TIG composite welding technology, the problem that an electron beam welding gun cannot conduct all-position welding is solved, and the problems that a key hole is unstable through single-laser welding and air holes do not reach the standard under other arc welding non-vacuum conditions are solved; and a mechanical arm multifunctional tool is arranged, the welding efficiency and the assembling precision are improved, and the problem that the electron beam welding vacuum chamber limits the product structure size is solved.

The invention discloses a lithium battery positive tab welding method based on a multi-welding-print design and a cylindrical lithium battery, and the lithium battery positive tab welding method based on the multi-welding-print design comprises the following steps: in a welding area of a positive tab and a current collector, adopting an arrangement mode of multi-spot welding print or multi-line welding print; the multi-spot printing adopts a grid shape and adopts an annular array; the multi-line welding printing adopts parallel lines; the multi-spot welding printing or the multi-line welding printing adopts a laser welding process or an ultrasonic welding process. Through multi-welding-mark collaborative welding, the welding strength is improved, the pseudo soldering probability is reduced, and the process stability is enhanced; by means of the multi-welding-print design and stress dispersion, the welding strength is improved by 30%-50% compared with that of a traditional single welding print; through the multi-welding-print redundancy design, even if individual welding spots fail, the overall conductivity can still be maintained; and the production debugging cost is reduced by improving the tolerance of equipment parameter fluctuation.

The invention relates to the technical field of steel pipe machining, in particular to a small and medium pipe machining production system and method. Comprising a raw material frame, a code spraying and lineation machining system, a fixed-length cutting system, double-end beveling equipment, double-end automatic grinding equipment, a steel pipe conveying and buffering station, an automatic flange assembling system, a manual assembling and bottoming system, an automatic robot cover surface welding system, a short pipe welding workstation and a ground logistics system. According to the method, control over length measurement, rust removal, bent pipe removal and the like is added at the beginning stage of the process, advanced technologies and equipment such as laser rust removal and a welding robot are adopted, and mechanization and intellectualization of the butt joint form of medium and long pipe sections are achieved; the functions of steel pipe feeding, pipe wall rust removal, ink jetting, fixed-length cutting, automatic beveling, automatic grinding, flange plug-in welding automatic assembly spot welding, robot automatic cover face welding, automatic logistics conveying and short pipe assembly welding are achieved.

The invention discloses integral automatic railway box girder reinforcement cage machining equipment and a working method, and relates to the technical field of reinforcement cage automatic production. A reinforcing mesh transfer system is arranged between a reinforcing mesh forming system and an annular conveying line, the reinforcing mesh transfer system is used for transferring welded and formed reinforcing meshes to the annular conveying line, and a rib distribution forming system is arranged above the annular conveying line; the annular conveying line is used for conveying welded and formed reinforcing meshes to the middle of the reinforcing bar distributing and forming system, the reinforcing bar distributing and forming system is used for conveying and falling straightened longitudinal bars and inserting the longitudinal bars into the reinforcing meshes, and an intelligent positioning welding machine capable of horizontally reciprocating is arranged at the position of the reinforcing bar distributing and forming system. Recognizing and spot-welding the reinforcing mesh and the longitudinal bars through an intelligent positioning welding machine. Automatic control over the whole manufacturing process of the reinforcement cage can be achieved, the working efficiency of manufacturing the reinforcement cage is improved, and manpower input is reduced.

A welding positioning device is provided with a vertical frame, a positioning groove, an insert and the like which are matched with one another, a worker can efficiently place L-shaped iron sheet strips into the positioning groove of the vertical frame for vertical positioning, then the vertical frame where the L-shaped iron sheet strips are placed is moved into an occupying welding machine for spot welding, and the two L-shaped iron sheet strips in the vertical frame are perpendicularly welded and fixed in an intersecting mode. Then the two intersecting and perpendicular frame edge strips are taken out, the other ends of the two intersecting and perpendicular frame edge strips are placed into the positioning grooves of the perpendicular frame to be intersected and perpendicularly positioned with the third L-shaped iron sheet strip and then welded, and the rectangular frame is sequentially welded in an end-to-end mode, so that operation is convenient in the using process, it can be guaranteed that the connecting angles between the adjacent edges are perpendicular, and errors are small; the defects that due to the fact that the angle of the welded rectangular frame is not perpendicular, the whole frame is twisted, a lamp body cannot be installed for cooperation, the frame is difficult to be installed in an open hole of a ceiling, the frame is used for a period of time after being installed, and loosening and falling are prone to occurring due to the fact that the frame is twisted are overcome, the right-angle angle between the two L-shaped iron sheet strips in the welding process is increased, and the welding quality is improved. The rejection rate is reduced, the product quality is improved, and production is facilitated.

The present application relates to aerospace stainless steel tank technical field, and disclose the control method of welding shape size of short shell and same material of tank, including aerospace stainless steel tank, including the following steps: A, first the cylinder section and end frame are positioned together; B, from I, II, III, IV four quadrant symmetry positioning welding; C, then symmetric four point welding between the quadrant, in this way in two symmetric points weld 8 points respectively; D, the special hexagonal ring inside support is placed in the weld welding area; E, complete positioning support forming, the end frame and the cylinder section of short shell are staggered seam reduction, reaches the design standard, avoids the product scrapping repair caused by serious deformation of welding, shortens the production cycle of product, reduces the uncontrollable factors, guarantees the height shape size at the same time, and lays a certain foundation for the control of overall section assembly shape size in later period.

A hot-stamped coated steel part includes a steel substrate and an aluminum alloy coating comprising, proceeding from steel substrate outwards, an interdiffusion layer and an outer layer. The total thickness of the coating ecoating and the thickness of the interdiffusion layer eIDL satisfy the following condition:40≤Epc≤80⁢with⁢Epc=(33.3-eIDL0.9+eIDL-ecoating)2-148⁢(eIDL-ecoating)-(33.3-eIDL0.9+eIDL-ecoating)The hot-stamped coated steel part comprises an undeformed portion having a thickness ePflat from 0.6 mm to 3.5 mm, and at least one deformed portion. A lineic density of cracks dC in the coating in the undeformed portion is higher than or equal to a minimum lineic density of cracks dCmin(ePflat) defined as:dCmin(epflat)=15.5+91*e-7.44-2.88*arctan(5.49*(epflat-1.71))-106.5*e-8.62-3.34*arctan(5.49*(epflat-1.71))

This invention provides a process for welding positioning ribs in a nuclear power generator, comprising the following steps: S1: Place the generator base horizontally on a platform and level it; S2: Mark the machining allowance line and hammer a punch; S3: Turn the generator base upside down, place it upright on the platform, and level it; S4: Install the positioning rib welding fixture according to the marked circular line in S2 and spot weld it in place; S5: Pull steel wires at the slots of the positioning rib welding fixtures at both ends of the generator base; S6: Weld the limiting round steel; S7: Remove the steel wires and hoist the positioning ribs in groups; S8: Adjust the positioning rib welding fixtures so that the positioning ribs are tightly attached to the limiting round steel; S9: Assemble the support blocks and spot weld them in place; S10: Use a 3D laser scanner to detect the position and dimensions of the positioning ribs and record the data; S11: Weld in sequence, and perform flat welding on all welds; S12: Grind the welds and perform 100% flaw detection. S13: Remove the positioning rib welding fixture, and finally use a 3D laser scanner to detect the position and size of the positioning rib, and record it for future reference.

The invention discloses a cooperative control method and system for transfer and turnover of a tower drum track, and relates to the technical field of industrial control. The method comprises the following steps: acquiring real-time state parameters of a first rail car and a second rail car; the target overturning angle of the second rail car is calculated according to the first overturning angle, and the second rail car is controlled to overturn the second tower barrel section to the target overturning angle; the second rail car is controlled to move towards the first rail car according to the second bearing position, the circular seam gap and the unfitness of butt joint are detected in the moving process, and the moving speed and the second overturning angle are finely adjusted till the circular seam gap and the unfitness of butt joint reach the allowable welding range; and after assembly spot welding is completed, the two rail cars are switched to a rigid synchronous mode and synchronously rotate at the same overturning angular speed, and the assembled tower shell sections are driven to integrally rotate so as to be matched with automatic welding equipment to complete girth welding. Automatic cooperative control over transferring, overturning, assembling and girth welding of the tower shell sections is achieved, and production safety and welding quality are improved.

The application discloses an assembled light steel combined truss supporting steel wire mesh frame mortar-pearlite-polyphenyl composite shear wall and a method, and relates to the technical field of assembled concrete building structure engineering. The application comprises a steel wire mesh mortar-pearlite surface layer which is composed of a steel wire mesh mortar layer and a pearlite fireproof layer; a load-bearing steel wire mesh frame which is composed of inner and outer steel wire mesh spot-welded horizontal web wires and inclined web wires; a light steel frame which is welded by C-shaped steel; a light steel combined truss which is composed of a steel wire mesh mortar layer strip outer chord, a light steel frame vertical C-shaped steel inner chord and a countersunk broken bridge long self-tapping screw; a window frame self-tapping screw set block combined connection structure which is a connecting joint of a reinforced mortar strip and a concrete shear wall window frame light steel frame; and an assembled shear wall combined connection structure which refers to the assembly of steel bar sleeves between upper and lower concrete shear wall plates and the assembly of post-cast concrete strips for left and right shear walls. The application has the characteristics of small thickness, light weight, good fire resistance, waterproofness and heat insulation performance.

A hot-stamped coated steel part includes a steel substrate and an aluminum alloy coating comprising, proceeding from steel substrate outwards, an interdiffusion layer and an outer layer. The total thickness of the coating ecoating and the thickness of the interdiffusion layer eIDL satisfy the following condition:with40≤Epc≤80Epc=(33.3-eIDL0.9+eIDL-ecoating)2-148⁢(eIDL-ecoating)-(33.3-eIDL0.9+eIDL-Ecoating)The hot-stamped coated steel part comprises an undeformed portion having a thickness ePflat from 0.6 mm to 3.5 mm, and at least one deformed portion. A lineic density of cracks dC in the coating in the undeformed portion is higher than or equal to a minimum lineic density of cracks dCmin(ePflat) defined as:dcmin(epflat)-15.5+91*e-7.44-2.88*arctan⁡(5.49*(epflat-1.71))-106.5*e-8.62-3.34*arctan⁡(5.49*(epflat-1.71))

A method for bonding RSB (Reinforced Plastic Sheet) to a stainless steel plate in the pump tower base area is disclosed. This method utilizes a stainless steel clamping fixture to achieve the bonding. The fixture includes a U-shaped pressure plate, the shape and size of which are adapted to the secondary steel plate of the pump tower base. Limit screws are installed on the inner edge of the U-shaped pressure plate, and limit blocks and slow-descent nuts are spot-welded to the outer edge. The RSB is bonded to the secondary steel plate of the pump tower base by pressing it down slowly with the pressure plate. This ensures that the fixture completely covers the rigid secondary steel plate RSB during bonding and compression, guaranteeing uniform compression. During bonding, the fixture slowly compresses the adhesive-coated RSB to the secondary steel plate of the pump tower base. Because a certain adhesive thickness must be maintained, excessive compression must be avoided. This process ultimately completes the RSB-stainless steel bonding construction in the pump tower base area. Manually applying adhesive to the RSB and the secondary steel plate of the pump tower base within 10 minutes is extremely difficult. This invention, by using a pressure plate and limiting the compression of the adhesive, improves construction efficiency and ensures bonding quality.

A hot-pressed member having excellent post-coating corrosion resistance and excellent resistance spot weldability, a method for manufacturing the hot-pressed member, and a steel sheet for hot pressing suitable for a hot-pressed member having excellent post-coating corrosion resistance and excellent resistance spot weldability. The hot-pressed member includes a Zn-based coated layer on a first side of a steel sheet, and a Zn-based coated layer on a second side of the steel sheet. A coating weight of Zn in the Zn-based coated layer on the first side of the steel sheet is 5 to 35 g / m2, and an average line roughness Ra of a surface of the Zn-based coated layer on the first side is less than or equal to 2.5 μm. The average line roughness Ra of a surface of the Zn-based coated layer on the second side of the steel sheet is greater than or equal to 3.5 μm.

This invention discloses a welding positioning process for a frame of a frame-wound machine, comprising the following steps: Step 1: Positioning the Y-shaped part using a Y-shaped part positioning welding component, and fixing the straight plate and the bent part by spot welding to obtain a semi-finished Y-shaped part; Step 2: Fixing the spot-welded straight plate and the bent part by full welding using a welding robot to obtain a finished Y-shaped part; Step 3: Positioning the finished Y-shaped part from Step 2 to the semi-finished frame using a frame positioning welding component, and then fixing the finished Y-shaped part to the semi-finished frame by spot welding; Step 4: Fixing the Y-shaped part from Step 3 to the semi-finished frame by full welding using a welding robot to obtain a finished frame. This invention, through the Y-shaped part positioning welding component, can effectively correct the deformation of the bent part and the straight plate, thereby ensuring uniformity of the Y-shaped part template, making the dimensions of the riveted Y-shaped part stable and reliable, and reducing the workload of manual workpiece correction.

The utility model relates to the technical field of automobile manufacturing, in particular to a roof middle cross beam structure which comprises a roof middle cross beam (1). A cavity (2) is formed in the top cover middle cross beam (1); a top cover outer plate (3) is arranged at the top of the top cover middle cross beam (1); a buffer structure is arranged between the top cover outer plate (3) and the top cover middle cross beam (1); side wall assemblies (4) are arranged on the two sides of the top cover middle cross beam (1); compared with a traditional top cover middle cross beam with a U-shaped section, the top cover middle cross beam with the cavity is higher in bending resistance and torsion resistance, and the overall structural strength of the top cover middle cross beam can be effectively enhanced through the cavity; the two ends of the top cover middle cross beam are connected with the side wall assemblies through resistance spot welding, part of collision loads can be transmitted to the side wall assembly on the other side through the top cover middle cross beam to be dispersed, and therefore the impact resistance is better.

The utility model discloses novel cam turret type point bottom welding equipment which comprises a cam turret, a turret cam ring is arranged at the bottom end of the outer portion of the cam turret in a sleeved mode, a first supporting ring is arranged in the middle of the cam turret in a sleeved mode, clamping grooves are formed in the first supporting ring, and the clamping grooves are vertically distributed in the side face of the outer portion of the first supporting ring in a surrounding mode. A clamping groove is formed in the top end of the outer portion of the cam rotating tower, a battery cell is vertically placed in the clamping groove, the top end of the outer portion of the cam rotating tower is transversely sleeved with a connecting cylinder, a fixing frame is vertically arranged outside the connecting cylinder, a spot welder is vertically arranged at the bottom end of the fixing frame, and a welding needle is vertically arranged at the bottom end of the spot welder; and the lifting frame penetrates through the first supporting ring and ascends and descends on the side edge of the interior of the first supporting ring, the side face of the lifting frame is vertically provided with a transversely-arranged jacking column base, the jacking column base is located at the bottom end of the first supporting ring, and the lifting frame and the turret cam ring are in driving fit.

The utility model relates to the technical field of automobile part machining, in particular to an automobile part spot welding auxiliary device which comprises a workbench, a bidirectional lead screw, a first fixing block, a first fixing frame, a servo motor and the like. Two bidirectional lead screws are rotatably connected to the bottom of the workbench, two first fixing blocks are slidably connected to the front side and the rear side of the top of the workbench, first fixing frames are connected between the front first fixing block and the rear first fixing block, the first fixing blocks are in threaded connection with the bidirectional lead screws, and a servo motor is installed on the workbench. According to the auxiliary device, the connecting base, the second fixing block, the volute spiral spring, the rubber block and the connecting rod are arranged, under the elastic action of the volute spiral spring, the second fixing block can press the automobile part, the rubber block can increase the friction force between the automobile part and the second fixing block, and the stability of the auxiliary device is further improved; and an air cylinder and a lower pressing plate are further arranged, so that the second fixing block can automatically press and loosen the automobile parts.

The invention belongs to the technical field of calculation, and particularly relates to electric digital data processing, in particular to a data processing method, system and equipment for eight-channel electromagnetic detection. The arrangement mode of welding spots in the to-be-detected welding area is judged according to the image; a corresponding filtering method is selected through a control module according to the arrangement mode of welding spots, when the welding spots are in the shape of spot welding spots, mean filtering is carried out on pulse data obtained by scanning the spot welding spots, and when the welding spots are in the shape of annular welding spots, abnormal processing is carried out on pulse data obtained by scanning the annular welding spots, and then abnormal processing is carried out on pulse data obtained by scanning the annular welding spots. And then mean filtering is carried out on the pulse data subjected to abnormal processing, so that abnormal processing is carried out on the collected pulse data when the annular welding spot is detected, and inaccurate detection caused by adjacent welding positions is avoided.

The present invention relates to the technical field of welding machine tools, and in particular to a laser automatic welding device for processing fan casings, comprising: an automatic welding machine tool; a support table, an upper table surface provided thereon, and a spiral groove and a straight groove provided on the upper table surface; a calibration part, comprising a winding roller provided on the upper table surface, and a wrapping belt provided on the winding roller, and also comprising a guide column provided on the wrapping belt; the guide column is slidably provided in the spiral groove and the straight groove; a pushing part, on which a push rod is provided; a first driving part, for driving the pushing part to rotate on the support table. The first driving part of the present invention controls the rotation of the push rod and pushes the guide column to slide in the spiral groove and the straight groove. The guide column can push the fan casing to achieve preliminary alignment, and then the wrapping belt is wound up by the winding roller, and the fan casing is wrapped by the wrapping belt to achieve secondary alignment, which can effectively improve the alignment efficiency, and there is no need to spot weld the fan casing, thereby improving the welding efficiency.

The present invention relates to a laser connection method for micro-solder joints of a functional chip. The method comprises: embedding the functional chip in a fixture, placing the end of a lead to be welded at the center of a pad of the functional chip, applying solder paste to the surface of the pad with the lead, the solder paste completely covering the pad, and the solder paste having a thickness of 0.2-0.5 mm; performing laser soft soldering on the solder paste to form micro-solder joints connecting the solder paste, the pad, and the lead, and forming a uniform and continuous intermetallic compound at the interface between the pad and the solder paste. Laser welding parameters include: a laser power of 25W-40W and a welding time of 20ms-40ms. Using a semiconductor laser in combination with solder paste soft soldering can solve the problems of pad detachment and micro-solder joint failure caused by too little heat input, or micro-solder joint burnout caused by too much heat input. The method is suitable for ultra-thin pads, in particular, and achieves stable, high-quality, and efficient connection of the micro-solder joints of the functional chip. The tensile strength of the micro-solder joints is greater than 12.05MPa.

The present invention relates to a zinc plated steel sheet having excellent surface quality and spot weldability, and a manufacturing method therefore. A zinc plated steel sheet according to one aspect of the present invention comprises a base steel sheet and a zinc-based plating layer formed on the surface of the base steel sheet, wherein the GDOES profile of oxygen, which is measured in the depth direction from the surface of the base steel sheet, has a form in which a local minimum point and a local maximum point alternately appear in the depth direction from the surface, and the difference (a local maximum value−a local minimum value) between the oxygen concentration (a local minimum value) at the local minimum point and the oxygen concentration (a local maximum value) at the local maximum point can be 0.1 wt % or more.