65results about How to "Improve welding reliability" patented technology

The invention belongs to the technical field of welding, and discloses a dissimilar metal power modulation galvanometer laser welding method which comprises the following steps: finely cleaning a 6061 aluminum alloy and a 304 stainless steel plate by using acetone, and then airing for more than 20 minutes; the aluminum steel sheet is assembled, pressed and fixed on a welding test platform in a steel-up-aluminum-down mode; the position of the welding test platform is adjusted, argon serves as welding protection gas, and a protection gas nozzle is arranged to be aligned with a welding pool area; laser welding parameters are set, a laser power modulation mode is set to be a gradient power mode, and the gradient power mode is to regulate and control phase point laser power in a circular scanning track in the advancing direction of a welding seam; a welding test is carried out in the mode that a galvanometer laser head is fixed and a welding test platform is moved, and a laser and the welding test platform are synchronously started and stopped; and the protective gas is started 5 seconds before the laser is started, and after the laser is stopped, the protective gas is stopped lagging for 10 seconds so as to continuously protect the welding seam and prevent oxidation.

The invention discloses welding equipment for building pipe machining and relates to the technical field of pipe welding, the welding equipment comprises a bottom plate, two first grooves are symmetrically formed in the side wall of the top end of the bottom plate, first electric sliding rails are fixedly connected to the inner walls of the first grooves, and first sliding plates are slidably connected to the side walls of the top ends of the first electric sliding rails. The angle of a second U plate can be adjusted according to main pipe angles of pipes in different special shapes, so that the inclination angle of a second clamping plate is matched with the inclination angle of a main pipe, and the angle of a fourth U plate can be adjusted according to the angle of a side pipe, so that the inclination angle of a third clamping plate is matched with the inclination angle of the side pipe; and meanwhile, the distance between a sixth U-shaped plate and a fifth U-shaped plate can be adjusted according to the length of a branch pipe needing to be welded, branch pipes with different lengths can be fixed conveniently, and the welding efficiency and reliability when the device is used for welding pipes with special shapes are improved to a great extent.

The utility model relates to the technical field of battery manufacturing, and particularly discloses a battery, a battery pack and a power utilization device. The battery comprises a cover body and a shell, the cover body is welded to an opening of the shell and forms a welding seam, a reinforcing boss is arranged in a heat affected zone of the welding seam on the inner wall of the shell, and the reinforcing boss is continuously arranged along the circumferential surface of the inner wall of the shell. According to the invention, the reinforcing boss is additionally arranged in the heat affected zone, which is a certain distance away from the weld joint, of the side wall of the shell, so that the position of the side wall of the shell is thickened and reinforced, the welding strength is effectively improved, and the situation that the area is fragile and cracks before the anti-explosion valve to cause heat diffusion when the battery cell is subjected to emergencies such as thermal runaway and the like is avoided. According to the battery, the welding reliability of the cover body and the shell is improved, and the safety performance of the battery under special conditions is enhanced, so that the production yield is increased, and the production cost is reduced.

The invention discloses a reinforcing steel bar welding processing device, and relates to the technical field of reinforcing steel bar welding, the reinforcing steel bar welding processing device comprises a bottom plate, the side wall of the top end of the bottom plate is symmetrically and fixedly connected with two first electric telescopic rods, and the telescopic ends of the two first electric telescopic rods are fixedly connected with the same supporting plate. The angle of the corresponding clamping plate can be adjusted according to the double-U-shaped staggered reinforcing steel bars with different bending angles, so that the clamping plate can be attached to the outer walls of the bending positions of the double-U-shaped staggered reinforcing steel bars, and then the inclination angle of the fixing block is adjusted according to the inclination angle of the spiral protrusions of the outer walls of the corresponding double-U-shaped staggered reinforcing steel bars; and then the spiral protrusions on the outer walls of the double-U-shaped staggered steel bars are clamped and fixed through the fixing blocks, and the welding efficiency and reliability of the device between the double-U-shaped staggered steel bars and the cross beam steel bars are improved to a great extent.

The invention relates to a packaging electrode, a manufacturing method thereof and a semiconductor packaging device. The manufacturing method comprises the steps that a diamond composite metal base layer is prepared, a first alloy layer and a second alloy layer are formed on the upper side surface and the lower side surface of the diamond composite metal base layer respectively, and a conductive flange is formed on the side wall of the diamond composite metal base layer; the diamond composite metal base layer, the first alloy layer, the second alloy layer and the conductive flange are of an integrated structure. The surfaces, deviating from the diamond composite metal base layer, of the first alloy layer and the second alloy layer are machining surfaces and are used for being in direct contact with a chip; the flange welding surface of the conductive flange is free of diamond composition. According to the invention, the forming quality and performance of the large-size packaging electrode can be improved, so that the packaging reliability of the semiconductor packaging device can be effectively improved.

The invention relates to a high-reliability and high-integration microwave digital integrated module packaging method and a module, and belongs to the technical field of semiconductor device packaging, in the packaging method, welding of components on a low-temperature co-fired ceramic substrate is divided into two procedures, the welding procedure of a BGA packaging device is set after the welding procedures of other components, and the welding procedure of the BGA packaging device is set after the welding procedure of the other components. And the influence of other sintering procedures on the welding spots of the BGA packaging device is avoided. And meanwhile, the selectivity of the welding flux is also increased, and the Sn63Pb37 welding flux with better wettability is adopted for welding, so that the welding reliability of the BGA packaging device is improved.

The invention discloses an induction welding device for precise instrument machining. The induction welding device comprises a workbench, a movable plate slidably connected to the surface of the workbench and a supporting plate fixed to the top surface of the workbench. A first mounting seat and a second mounting seat are symmetrically mounted on the two sides of the top surface of the moving plate correspondingly, clamping assemblies are mounted on the side surfaces of the first mounting seat and the second mounting seat correspondingly, and the clamping assemblies are used for clamping a heat dissipation pipeline; and the welding assembly is installed on the upper portion of the workbench, and the welding assembly is used for welding the heat dissipation pipeline. According to the welding device, the rotating assembly and the clamping assembly are arranged, a heat dissipation pipeline is clamped on one side of the first mounting base and one side of the second mounting base through two clamping rings, a motor is started in the forward direction to drive a rotating shaft to drive a U-shaped plate to rotate, and therefore heat dissipation copper pipes are evenly heated in the welding process; the welding quality problem possibly caused by uneven welding temperature is effectively prevented, and then the overall welding quality and reliability are improved.

The invention provides a composite lead-free solder for brazing. The composite lead-free solder comprises the following components: Sn-Bi series low-temperature solder paste; the particle size of the X metal powder is between 0.5 mu m and 10 mu m; the composite lead-free solder is prepared by mechanically stirring the Sn-Bi series low-temperature solder paste and the X metal powder at the normal temperature, and the mass ratio of the Sn-Bi series alloy solder paste to the X metal powder ranges from 10: 1 to 30: 1; and when brazing is carried out in a preset temperature interval, the composite lead-free solder forms a Sn-Bi-X intermetallic compound. The micron-sized X metal powder is added into the Sn-Bi system low-temperature solder paste in a mechanical stirring mode, and the preparation method is simple and efficient; due to the formation of the Sn-Bi-X intermetallic compound, Bi segregation is remarkably reduced, and dendritic segregation is prevented; the selection of the superimposed components, the control of the combined mass ratio and the welding reliability of the sintered joint are obviously improved.

The utility model discloses a traction rope far-end fixing structure, an insertion part and an endoscope, and relates to the technical field of medical instruments. The traction rope far-end fixing structure is applied to an endoscope and comprises a fixing groove, the fixing groove is used for containing the far end of a traction rope, the fixing groove is fixedly connected with the far end of the traction rope, and the fixing groove is located on the outer surface of the tail section snake bone of an active bending section. The fixing groove extends from the near end of the tail section of snake bone to the far end of the tail section of snake bone; or the fixing groove is positioned on the outer surface of the lens seat and extends from the near end of the lens seat to the far end of the lens seat. The traction rope far-end fixing structure has the advantages that the tail end of the traction rope is easy to position, the welding operation difficulty of the tail end of the traction rope and the fixing groove is reduced, the welding reliability of the tail end of the traction rope and the fixing groove is improved, and burrs at welding spots are easy to polish.

The invention discloses a vacuum arc-extinguishing chamber copper-clad steel composite conducting rod, a method and a vacuum arc-extinguishing chamber. The composite conducting rod comprises a supporting rod and a conducting layer. The conductive layer wraps the outer surface of the supporting rod, and the supporting rod and the conductive layer are of an integrated structure to form a composite conductive rod; the conductive layer is made of an oxygen-free copper material; the supporting rod is used for enhancing the overall mechanical performance of the conducting rod. One end of the composite conducting rod is fixedly connected with the static end electrode or the moving end electrode; and the other end of the composite conducting rod is fixedly connected with an insulating pull rod or a circuit breaker. The integral conducting rod is formed by compounding high-strength metal materials such as oxygen-free copper and stainless steel, the mechanical strength of the inner material and the outer material is enhanced, the requirements for high conductivity and high mechanical strength are met, the conducting rod is machined at a time, acid pickling is conducted, assembling is simple in production, welding reliability is high, and cost is low. And the problem that the stainless steel core is desoldered or fractured when the existing structure is used can be effectively solved.

The invention discloses a method and device for determining the maximum allowable stress of a defect-containing welding structure. The method comprises the steps that the normal distribution condition of the defect position size and the non-defect position size of the welding structure is obtained; respectively establishing a first finite element model corresponding to a defect position and a second finite element model corresponding to a non-defect position by utilizing a Monte Carlo method based on the normal distribution condition; according to the first finite element model and the second finite element model, a first probability density function corresponding to the first maximum stress of the defect position under the unit load, a second probability density function corresponding to the maximum strength factor and a second maximum stress of the non-defect position under the unit load are determined; using the first probability density function and the second probability density function to determine an average stress, a safety stress, an average strength factor and a safety strength factor; and according to the second maximum stress, the average stress, the safety stress, the average strength factor and the safety strength factor, the allowable stress of the welding structure in the defect-containing state is determined.

This invention discloses an automatic welding machine, comprising a first welding station, a second welding station, and a transfer mechanism. The first welding station includes a first support and positioning component and a resistance welding machine. The first support and positioning component is provided with a first electrode, and the first electrode is provided with a movable connection structure for movably connecting a pre-welding mounting plate. The resistance welding machine includes a second electrode, which cooperates with the first electrode to weld the mounting plate to the inner wall of the first end of the side plate. The second welding station includes a second support and positioning component and a laser welding machine, used to weld the top end of the second outward flange to the first end of the first outward flange. This automatic welding machine can realize the automatic welding of beam frames, which is beneficial to improving welding quality and welding efficiency, and reducing labor intensity.

This utility model proposes a cylindrical secondary battery, including a positive electrode current collector and a negative electrode current collector. The positive electrode current collector includes a disk body and a tail body. The disk body is provided with multiple positive electrode welding areas. The area of ​​the disk body is S1, and the sum of the areas of the multiple positive electrode welding areas is S2. 100 12%S1≤S 100 ≤24%S1; The negative electrode current collector is provided with multiple negative electrode welding areas, and each negative electrode welding area is provided with multiple negative electrode solder marks. The area of ​​the negative electrode current collector is S2, and the sum of the areas of the multiple negative electrode welding areas is S. 200 Among them, 10%S²≤S 200 ≤20%S2. This utility model, by setting a positive electrode welding area and a positive electrode solder mark on the positive electrode current collector, and setting a negative electrode welding area and a negative electrode solder mark on the negative electrode current collector, and by reasonably setting the area of ​​the positive electrode welding area and the negative electrode welding area, can take into account the battery's overcurrent capacity as well as the battery's processing quality and processing efficiency, thereby effectively improving the overall performance of the battery.

The application discloses a kind of welding methods of high-strength steel shell and low-strength steel inner shell penetration pipe of jacketed pressure vessel, core step includes: precision pretreatment before welding: size and defect detection, homogenization modification and preheating are carried out to machining bevel; Sequential optimization welding: the sequence of "first inside then outside" and "sectional skip welding" is combined, and prior to pipe side (high-strength steel side) is carried out backing surfacing welding; Strict welding control: the combined process of tungsten argon arc welding backing and electrode arc welding filling is used, interlayer temperature, heat input and weld size are accurately controlled; Timely and effective post-welding treatment: high-temperature post-heat treatment is carried out immediately after welding, or according to the structure constraint degree, choose whole intermediate annealing.The application effectively decomposes and releases welding stress through systematic process combination, inhibits the generation of crack, and significantly improves the welding quality and reliability of jacketed vessel penetration pipe joint.

The utility model discloses a getter structure for a vacuum arc-extinguishing chamber with long mechanical life. The getter structure comprises a getter base body and a getter suction pressed powder wrapped in the getter base body, the getter base body comprises a cavity and a welding outer ring which are fixedly connected; the outer contour line of the welding outer ring is circular; a plurality of holes are formed in the wall surface of the cavity and are used for enabling the getter air suction pressed powder to be in contact with the external environment. The utility model discloses a getter structure for a vacuum arc-extinguishing chamber with long mechanical life, which is characterized in that a welding outer ring of a getter base body is circular, so that the spot welding outer contour of the getter base body is circular, the stress generated during spot welding of the conventional getter with a square outer contour can be effectively reduced, and the welding reliability is improved. Besides, a plurality of holes are formed in the cavity of the getter base body to form a net structure, so that the good air suction characteristic of the getter air suction pressed powder is guaranteed, and the problem that the getter air suction pressed powder falls off after multiple times of mechanical running-in in a vacuum arc extinguish chamber with long mechanical service life is effectively solved.

Provided are an electrode plate, a manufacturing method of the electrode plate, a rechargeable battery applying the electrode plate, and a production device applying the electrode plate. The electrode plate includes a current collector (1). The current collector (1) includes an insulating layer (11), a first conductor layer (12) and a second conductor layer (13) disposed on two sides of the insulating layer (11) respectively, and a conductive connector (5). The outward side of the first conductor layer (12) is provided with a first blank region (2) and a first active material coating layer (21) side by side. The outward side of the second conductor layer (13) is provided with a second blank region (3) and a second active material coating layer (22) side by side. The first blank region (2) is provided with a folded region (4) adapted to fold the current collector (1) 180 degrees, and the second blank region (3) covers the first blank region (2). One end of the conductive connector (5) extends out of the folded region (4) to connect the first blank region (2). The other end of the conductive connector (5) is connected to the second blank region (2). The conductive connector (5) is adapted to electrically connect the first blank region (2) and the second blank region (3). The electrode plate has the effect of improving the safety of the rechargeable battery and facilitating production.

This utility model relates to the field of welding equipment technology, specifically to an ultrasonic battery frame welding device with multiple welding heads. It includes a frame, a top plate connected to the upper part of the frame, and several cylinders mounted on the top plate. A connecting frame is fixedly connected to each cylinder, and a mounting box is driven to the lower end of the piston rod of each cylinder. A mounting ring is fixedly connected to the lower part of the mounting box. This utility model uses multiple cylinders to drive multiple welding heads to work synchronously, enabling simultaneous welding of different parts of the new energy vehicle battery frame. This significantly shortens the welding cycle, improves production efficiency, and is suitable for large-scale mass production. Through the clutch control of the lifting insulating rod and the power socket, the welding head only activates the cooling element when not welding, avoiding energy loss during the welding process and effectively reducing the temperature of the welding head.

The application discloses a power device, a circuit board assembly and electronic equipment, and relates to the technical field of electrical equipment, comprising a body, a first surface and a second surface oppositely arranged along a first direction, the first surface having a welding area; a plurality of limiting members are arranged on the first surface and protrude from the first surface along the first direction, and the plurality of limiting members are arranged at intervals on the periphery of the welding area, and the limiting members abut against the heat sink along the first direction. When the welding area of the body and the heat sink are welded by means of solder paste or other welding materials, the plurality of limiting members are arranged at intervals on the periphery of the welding area and abut against the heat sink, which can effectively prevent the power device from tilting due to the flow of welding materials or thermal stress during the welding process, ensure that the power device remains flat after welding, thereby improving the welding quality and reliability, enhancing the heat dissipation performance, reducing the risk of poor electrical contact or uneven heat distribution caused by the tilting of the power device, and improving the safety and reliability of the power device.

The embodiment of the present application discloses a packaging structure and packaging method of a power module, which are applied in the automotive field. The packaging structure includes a power module and a liquid-cooled radiator. The power module includes a power module body, a metal base plate and a heat dissipation fin tube, the front of the metal base plate is connected to the power module body, and the back of the metal base plate is connected to the heat dissipation fin tube. Among them, the metal base plate has a protrusion protruding from the power module body. There are multiple grooves on the liquid flow pipeline of the liquid-cooled radiator, and there is a cavity between two adjacent grooves in the multiple grooves, and the cavity is used to connect the two adjacent grooves. The power module body is overlapped on the groove, the back of the protrusion is in contact with the edge surface of the groove, and the heat dissipation fin tube is placed in the groove. Among them, there is a front weld on the front of the protrusion, and there is a back weld on the back of the metal base plate except the back of the protrusion. The front weld and the back weld are used to form a welding sealing ring.

The application relates to the technical field of batteries, in particular to a pole post and cover plate assembly. The pole post comprises a turn-up part, a post body part and a plate body part arranged along the axial direction of the pole post in sequence; the turn-up part can be folded outward away from the axis of the pole post; the inner side ring wall of the turn-up part is formed into a first wall part before being folded, the outer side ring wall of the turn-up part is formed into a second wall part extending along the axial direction of the pole post, at least part of the first wall part is arranged in an inclined mode, so that the thickness dimension of one end of the turn-up part away from the post body part in the radial direction of the pole post is smaller than the thickness dimension of one end of the turn-up part close to the post body part; the thickness dimension of one end of the turn-up part away from the post body part in the axial direction of the pole post is smaller than the thickness dimension of one end of the turn-up part close to the post body part in the axial direction of the pole post after being folded, so that the problem that the turn-up part is prone to warping after being pressed is solved, the post body part can be completely attached to the outer connecting sheet of the battery cell needing to be connected, the risk of false welding is reduced, and the welding reliability is improved.

The application provides a stepped protection treatment method for a copper pad of a WBCSP substrate and the WBCSP substrate. The treatment method obtains a substrate provided with a copper pad. A solidified solder resist layer with a preset opening is formed on the substrate, so that a preset area of the copper pad is exposed. The preset area comprises a single copper layer and a copper oxide layer attached to the surface of the single copper layer. The substrate on which the solidified solder resist layer is formed is immersed in a benzotriazole aqueous solution. The benzotriazole reacts with the single copper layer to form a benzotriazole-copper complex film on the surface of the single copper layer. The benzotriazole does not react with the copper oxide layer. The substrate on which the benzotriazole-copper complex film is formed is subjected to pickling to remove the copper oxide layer. An alkaline solution is used to perform stripping treatment on the substrate after pickling to remove the benzotriazole-copper complex film. Surface treatment is performed on the substrate after the stripping treatment is completed to form an organic soldering film on the preset area of the copper pad.

The invention relates to the technical field of pole piece welding, in particular to a composite current collector pole piece welding method of a laminated battery. The method specifically comprises the following steps: (1) coating pole piece paste on the surfaces of a plurality of composite current collectors, and reserving a tab blank area to obtain a composite current collector pole piece; (2) welding an adapter foil in a tab blank area of the composite current collector pole piece; (3) sequentially laminating the composite current collector pole pieces welded in the step (2), and after lamination is completed, welding the composite current collector pole pieces which are laminated up and down to obtain a semi-finished product of the laminated current collector pole piece; and (4) carrying out pressure fusion welding treatment on the welding part on the semi-finished product of the laminated current collector pole piece, and completing welding to obtain the laminated current collector pole piece. According to the invention, before welding, the tab blank area of the composite current collector pole piece is coated with the cleaning-free soldering flux, and under the synergistic effect of the welding process and the soldering flux, the quality of the welding part is greatly improved, and the defects such as cavities at the welding part are reduced.

This invention relates to the field of automated welding technology, specifically to an automated welding fixture and method for laser wire-filler welding of circumferential welds. The fixture includes a laser welding torch, a rotating system, and a control system. The laser welding torch is equipped with a wire feeding mechanism and is fixed on the welding torch support of the rotating system. The rotating system consists of a motor mechanism, a rotating support, and a rotating base. The rotating base includes a welding torch support, an XY bidirectional fine-tuning slide, a rotating platform, and a bearing assembly. This invention uses a motor-driven rotating mechanism to rotate the welding torch at a uniform speed, ensuring that the laser spot and wire feeding position are always aligned with the center of the circumferential weld. The control system coordinates the adjustment of laser power, wire feeding speed, and rotation speed to achieve automated welding of the circumferential weld.

The invention provides a quick-welding and high-reliability brazing film and a preparation method and a using method thereof, and belongs to the technical field of welding. According to the invention, a Ni / Al self-propagating reaction film is combined with a low-melting-point Sn weld-aid layer by relying on hot-pressing, electro-deposition and anodic oxidation composite process molding, and a multi-layer structure brazing film of a porous energetic film-Ni reaction layer-Sn anchoring layer is designed. According to the method, multi-point laser triggering and gradient pressure synergistic effect are combined, accurate regulation and control of multi-point triggering-reaction-welding can be achieved, the film is subjected to global uniform self-propagating exothermic reaction, rapid brazing connection is achieved, and an alloying connection interface with high bonding strength is formed. The process is simple, convenient and rapid, high in production efficiency and low in cost, the production period can be remarkably shortened, the problems that a traditional film interface is weak in bonding force, prone to layering and falling off and the like are effectively solved, welding faces of any shapes can be adapted, and a new technical approach is provided for efficient connection of complex components.

The utility model relates to the technical field of electronics, in particular to a data line forming structure. According to the technical scheme, the device comprises a conveying frame, a first electric sliding rail, a second electric sliding rail and a second mounting frame, the first mounting frame is fixedly mounted at the front end of the other side of the conveying frame, a fixing frame is fixedly mounted at the top of the first mounting frame, and the first electric sliding rail is fixedly mounted on one side of the top of the fixing frame. Through the combination of various structures, the structure can conveniently realize the rapid and efficient welding of the data line, is more accurate and reliable than the traditional manual welding, improves the production efficiency, reduces the manual operation, reduces the error and loss caused by human factors, can conveniently and accurately limit and fix the position of the data line, and improves the production efficiency. Accurate correspondence of welding points in the welding process is ensured, the welding precision is greatly improved, the risks of welding errors and mismatching are reduced, and the complexity of the welding technology is reduced.

The invention relates to the technical field of new energy, in particular to a composite current collector assembly and a preparation method thereof, a pole piece assembly and a preparation method thereof and a battery. The composite current collector assembly comprises an insulating layer, a conductive layer and a weld-aid coating, the conductive layer is located on at least one side of the insulating layer, the conductive layer comprises an electrode active area and a tab blank area connected with the electrode active area, and the weld-aid coating is located on the conductive layer corresponding to the tab blank area. The raw materials of the weld-aid coating comprise modified rosin, organic acid, organic amine, a wetting agent, a surface active agent and a corrosion inhibitor. By selecting the raw materials of the weld-aid coating, the traditional transfer welding procedure can be omitted, the problem that the welding process is tedious is solved, and the welding quality is good.

The application relates to the technical field of welding processing equipment, and discloses a component positioning and welding tool of a remote controller, which comprises a base, a supporting base is arranged at the middle of the bottom end of the base, an electrical box for providing control and energy supply for the whole device is arranged in the supporting base; a conveying and discharging mechanism is arranged at the middle of the top end of the base and is used for conveying a printed circuit board in the remote controller and discharging static electricity generated by friction on the printed circuit board. When the printed circuit board on the remote controller is subjected to welding processing of metal springs, ion wind generated by an ion fan in the removing protection mechanism is pressurized through a flat accelerating part and can be concentratedly sprayed to a welding area, so that partial static electricity generated in the welding process can be comprehensively eliminated, hidden damage of integrated circuits caused by static electricity residues can be avoided, the ion wind can also blow the flexible grounding sheet to contact the plate body, a secondary static electricity discharging channel is formed, and double protection is provided for static electricity removal.

This utility model relates to the field of electronic component technology, and in particular to a surface-mount electronic component that overcomes the problems of existing surface-mount electronic components that may damage circuit boards, have poor soldering to circuit boards, and are not conducive to automated pick-up. The functional ceramic body has upper and lower electrodes on its upper and lower surfaces, respectively. Upper and lower leads are soldered to the upper and lower electrodes and extend from the functional ceramic body. An encapsulation layer covers the functional ceramic body, the upper and lower electrodes, and the encapsulated portion of the upper and lower leads. The portions of the upper and lower leads exposed in the encapsulation layer include a starting segment extending from the functional ceramic body, a downward bending segment from the starting segment, and a horizontal bending segment bending downwards from the downward bending segment towards the bottom of the functional ceramic body. The horizontal bending segment continues to extend and forms a support portion that contacts or tends to contact the bottom surface of the encapsulation layer. The bottoms of the horizontal bending segments of the upper and lower leads are on the same plane, and at least a portion of the horizontal bending segments of the upper and lower leads is the solder joint of the electronic component on the circuit board.

This utility model relates to the field of brush wire spot welding technology, specifically a brush wire spot welding device, including a base plate and an extrusion positioning mechanism. A fixed base and a mounting box are fixedly connected to the upper side of the base plate. Two symmetrically arranged U-shaped plates are fixedly connected to the upper side of the fixed base. Double-ended lead screws are rotatably connected inside each of the two U-shaped plates. Two lead screw sleeves adapted to the double-ended lead screws are provided on each of the two lead screw sleeves. Horizontal plates are fixedly connected to the lower sides of the four lead screw sleeves. An array of guide wheels is rotatably connected to the upper sides of the four horizontal plates. The extrusion positioning mechanism includes a mounting base located above the mounting box. This utility model uses a handwheel to drive the double-ended lead screws to adjust the spacing of the guide wheels. Combined with a cylinder pushing a wedge block mechanism and the elastic clamping of the pressure plate, it achieves precise alignment and tight fit of the two brush wires. This design effectively prevents displacement or loosening during the welding process, ensures the consistency of the spot welding position, and significantly improves welding quality and reliability.

The utility model discloses a copper jumper pin-free packaging structure with a side tin climbing function, which comprises a metal frame, a plurality of chip packaging units arranged in a matrix mode are arranged on the metal frame, and two Y-direction long connecting ribs and two X-direction long connecting ribs are arranged on the peripheral side of each chip packaging unit. The Y-direction long connecting rib is communicated with the two X-direction long connecting ribs; each chip packaging unit comprises a chip welding area arranged in the middle, a left metal contact point and a right metal contact point, the left metal contact point and the right metal contact point are arranged on the left side and the right side of the chip welding area, the right metal contact point is connected with the chip welding area, and the left metal contact point is connected with the adjacent Y-direction long connecting rib and the X-direction long connecting rib. And the semiconductor chip is connected with the left side metal contact point through a copper jumper wire. According to the utility model, the copper jumper wire is adopted for welding, the welding reliability is improved, the external metal contact point realizes a complete tin climbing function, and the welding firmness of a product is improved.