43results about How to "Avoid Welding Phenomenon" patented technology

The invention discloses a welding method for an intermediate frequency inverted resistance welding machine. The intermediate frequency inverted resistance welding machine comprises a main controller, a human-computer interface, an inverter module, a voltage transforming and rectifying circuit, an electric current collecting device and a voltage sensor. According to the intermediate frequency inverted resistance welding machine, the working frequency of the system is 1800 HZ, the sampling frequency and the control accuracy are improved unprecedentedly, meanwhile the welding transformer size is reduced, welding parameters are adjusted according to actual conditions of contact resistors to be performed point welding, the electric current and the time are intelligently controlled, and cold joints and the like are effectively avoided.

The invention relates to the preparation technical field of a lithium ion battery, and discloses a tab welding structure and a tab welding method of a flexibly packaged lithium ion power battery. The tab welding structure comprises a current collector (1) and a concave type tab welding block; the concave type tab welding block comprises a tab upper welding leg (2), a tab lower welding leg (3), a tab main body (4) and tab rubber blocks (5); the tab upper welding leg and the tab lower welding leg are fixed at the same end of the tab main body, and the tab upper welding leg and the tab lower welding leg and one end of the tab main body form a groove; the tab rubber blocks are arranged on the upper and lower end planes of the tab main body; and the current collector is welded to the groove. By virtue of the tab welding structure and the tab welding method provided by the invention, the welding area can be doubled and welding strength can be improved; and in addition, a phenomenon of cold solder joint can be avoided, the battery internal resistance can be lowered, the battery energy loss can be lowered, and safety in the welding process can be improved.

The invention provides a draw welding method for a micro-miniature conduction slip ring. The method includes the steps of cleaning, thread feeding, thread stripping, oxide layer removing, wire tin hotdip coating, welding, cleaning, drying and the like, and then the satisfactory ring piece of wire welding is obtained. The method solves the problem that the welding quality of the micro-miniature conduction slip ring is not good. By using the method, the welding area can be enlarged, the welding quality and reliability of the ring piece can be improved, the intensity of a welding spot can be enhanced, the welding efficiency can be improved, virtual welding phenomena can be avoided at the same time, and the whole performance of the conduction slip ring can be obviously improved. The method further has the advantages of effectively improving the pouring yield of the micro-miniature conduction slip ring, reducing waste and lowering the production cost. The method solves the problem that thewelding quality of the micro-miniature conduction slip ring is not good, and is suitable for the production of the high-accuracy micro-miniature conduction slip ring.

The invention relates to a welding method and a device of frame support rings of a bag type dust collector. After longitudinal steel wires are straightened, the steel wires are inserted into welding equipment according to the number of frame longitudinal steel wires; support rings are put in to perform the spot welding connection with the longitudinal steel wires; and the radial expansion force is applied to the support rings before the welding, so that all the welding points of the support rings and the multiple longitudinal ribs are fully contacted. Compared with the prior art, the welding method and device can prevent the pseudo soldering phenomenon of synchronous welding of multiple points caused by the size errors of the support rings and devices for supporting the support rings.

The invention provides a mask plate net stretching assembly, a net stretching device and a net stretching method, the mask plate net stretching assembly, the net stretching device and the net stretching method are used for stretching a mask plate on a mask frame, the mask plate comprises two welding areas located at the two opposite ends of the mask plate, each welding area comprises a first faceand a second face which are opposite, and the mask frame comprises two opposite first side edges; the first surface is attached to the surface of the first side edge of the mask frame; the mask platenet stretching assembly comprises a main frame which comprises a pressing plane used for pressing a second face of a welding area and a back face opposite to the pressing plane, and a hollow area penetrating through the pressing plane and the back face is arranged in the middle of the main frame; and the force application structure is arranged on the main frame and applies a first pressing actingforce and a second pressing acting force to the two opposite ends of the main frame correspondingly, and the directions of the first pressing acting force and the second pressing acting force are perpendicular to the pressing plane and are the same. According to the mask plate net stretching assembly, the net stretching device and the net stretching method provided by the invention, defects causedby wrinkles of mask plate net stretching can be overcome.

Disclosed is a car relay, which comprises a foundation, an electronic element, a pair of parallel coil lead chips, wherein the parallel coil lead chips are respectively inserted in a coil former, the lead chip is opened a hole which is larger than the diameter of the leading-out end of the electronic element, a hole smaller than the leading-out end of the electronic element is provided in the front of the hole, the two holes are connected mutually, the leading-out end of the electronic end is positioned in the bigger hole of the lead chip, the lead chip is inserted in the foundation, the leading-out end of the electronic element is inserted in the smaller hole from the bigger hole by the foundation. The invention additionally provides the corresponding installment method. The invention has the advantages of reasonable structural design, convenient installment and good fixing effect, which resolves problems of poor soldering in welding process of lead chips and difficult welding caused by small volume of relays and small installment space, greatly increases working efficiency, and the car relay can bear certain vibration, increase product quality and finished product percent of pass, and has reliable and stable usage and long service life.

The invention discloses automatic lead welding equipment for a junction box of a solar panel. The automatic lead welding equipment for the junction box of the solar panel comprises a rack, a transmission device, an auxiliary supporting device, a moving platform, a horizontal guide mechanism, a Z-axis guide mechanism, a welding head mechanism and a pressing device, and the auxiliary supporting device, the transmission device and the moving platform are fixed to the rack from top to bottom in sequence; the horizontal guide mechanism is installed on a moving shelf of the moving platform, the Z-axis guide mechanism is installed on a Y-direction guide assembly push plate of the horizontal guide mechanism, the welding head mechanism is installed on a Z-direction guide assembly push plate of theZ-axis guide mechanism, and the pressing device is installed on a locating plate of the Z-axis guide mechanism. Through the mode, the automatic lead welding equipment is compact in structure and steady in running, a floating assembly sufficiently guarantees the welding quality, and the pesudo welding phenomenon generated during welding is avoided; a welding pencil cleaning device conducts automatic cleaning, the cleanliness of the welding position is guaranteed, the cleaning time is saved, and the welding quality is also guaranteed.

The invention relates to a welding process of a dual-row QFN integrated circuit, Circuit board weld field, The process comprises the following steps: S1) screen printing: brushing solder paste on thebonding pad of the circuit board by a screen printer, wherein the ratio of the area of the aperture in the fine pitch area to the area of the bonding pad of the circuit board is 0.85 to 0.95, the thickness of the steel plate is 0.09 to 0.11 mm, and the ratio of the thickness of the fine pitch area to the thickness of the steel plate is 0.85 to 0.95; The printing speed of screen printer is 30-40mm/s, the pressure of front and back scraper is 2.5-3.5 kg, the demoulding length is 1.4-1.6 mm, and the demoulding speed is 0.4-0.6 mm/s. 2) mount: mounting with a mount machine; S3) reflow soldering: reflow soldering is carried out by using a reflow soldering equipment, wherein the temperature peak value of the reflow soldering is 240 +/- 5 DEG C, the reflow time when the temperature is higher than217 DEG C is 30 to 60 seconds, and the temperature rise slope is less than or equal to 3 DEG C/s; S4) testing: testing the soldering quality and assembly quality of the assembled circuit board; S5) repairing: repairing the circuit board which is detected to be out of order, so as to improve the qualification rate of the double-row QFN integrated circuit.

The invention discloses a high-fidelity and high-definition DP connector. The connector comprises a female connector and a male connector, a metal shell is arranged outside the female joint; a rubbercore is arranged in the metal shell; a mounting groove is formed in the outer end part of the female joint; a PIN terminal is arranged in the mounting groove; wherein the end part of the PIN terminalis provided with a lead, two sides of the female joint are provided with antiskid bulges, the female joint is internally provided with a through hole, the through hole is internally provided with a hook, the outer wall of the female joint is provided with a buckle, the other end of the female joint is provided with the male joint, and the outer wall of the end part of the male joint is provided with a fixing groove. The connector has the advantages that the U-shaped groove structure increases the contact area of the rubber core and the wire during welding, the soldering tin layer can avoid insufficient soldering, the welding quality of the wire is guaranteed, the data transmission quality is guaranteed, the hook design can conveniently connect and separate the male connector and the femaleconnector, and the connector is simple and convenient to use.

The invention discloses a hook type commutator. The hook type commutator comprises a substrate and commutator segments which are uniformly arranged on the outer circumference of the substrate, whereininsulation slots are formed among adjacent commutator segments for insulating. The hook type commutator is characterized in that the commutator segments have dual-hook designs; the top of each commutator segment is provided with two bonding wire hooks; the two bonding wire hooks are arranged side by side at a certain distance along the circumferential direction of each commutator segment; and molded surfaces of which two ends assume R angles and the middles are straight lines are molded on the tops of the hooks on inner sides of the bonding wire hooks. Through adoption of the hook type commutator, the problems of carbon deposition and pseudo soldering in the commutator can be solved completely, so that the two main factors of motor damage are eliminated; the service life of a motor is greatly prolonged and effectively ensured; and the production cost is low.

The invention discloses an lithium ion battery point bottom connecting piece, which comprises a connecting substrate and burrs arranged at both sides of the connecting substrate. According to the invention, as burrs are arranged at the upper and lower surfaces of the connecting substrate, a large current generated in a welding process is discharged through the burrs, which can be effectively melted instantly, and electrode tabs and the lithium ion battery point bottom connecting piece, as well as the lithium ion battery point bottom connecting piece and the bottom of a lithium ion battery housing are firmly fused together, thus effectively overcoming the false welding phenomenon, improving the welding strength, and reducing the internal resistance, so the lithium ion battery point bottom connecting piece is highly efficient and reliable in performance. The invention also discloses a preparation method of a lithium ion battery. A nickel plated steel band is processed by a mechanical stamping method to form burrs on two surfaces; then stamping is carried out to obtain the lithium ion battery point bottom connecting piece; and then point bottom welding is carried out, and subsequent processing is performed to obtain a lithium ion battery, thereby greatly improving the yield.

The invention discloses a PCB composite board for a PTC heater. The PCB composite board comprises a positive plate and a negative plate, wherein the positive plate is provided with a plurality of positive pole jacks, and the negative plate is provided with a plurality of negative pole jacks; the end part of the positive plate is provided with a positive wire welding end, and the end part of the negative plate is provided with a negative wire welding end; the positive wire welding end and the plurality of positive pole jacks are electrically connected through a positive printed circuit on the positive plate; the negative wire welding end and the plurality of negative pole jacks are electrically connected through a negative printed circuit on the negative plate; and the positive plate and the negative plate do not contact with each other. The PCB composite board provided by the invention improves the technical problems of poor heat dissipation performance, low safety, low yield and the like of conventional PCB boards, and has the characteristics of simple structure, good heat dissipation performance, high qualified rate of welding, good safety performance and the like.

The invention discloses a suction nozzle for a testing sorting machine. The suction nozzle comprises a suction nozzle body, which comprises a suction nozzle rod and a suction nozzle head, wherein vacuum runners are formed in the centers of the suction nozzle rod and the suction nozzle head; a detachable positioning protecting device is arranged on the suction nozzle body and comprises positioning protecting rods which are arranged on the two sides of the suction nozzle body and are parallel to the suction nozzle body. The suction nozzle for the testing sorting machine is simple in structure and easy to manufacture; the pin transformation of a semiconductor device is effectively avoided; the suction nozzle rod is connected with the suction nozzle head through a connector; the suction nozzle has the advantages of short repairing time, high product quality, and the like, and the long service life of the suction nozzle head is long; the suction nozzle is worthy of wide popularization.

The invention relates to a power socket demultiplexer which comprises a base and a cover. The base is connected with the cover; a terminal riveting wire assembly is arranged in the base; the terminal riveting wire assembly comprises an upper terminal, a lower terminal and a wire; the front sides and the rear sides of the upper terminal and the lower terminal are respectively provided with a plurality of pairs of inserted pins; the upper terminal and the lower terminal are respectively provided with terminal wire riveting ports; the wire is connected with the corresponding terminal wire riveting ports; base inserted pin placement grooves are arranged at four edges of the base; a base wire outlet is arranged at the left side of the base; the inserted pins are positioned in the base inserted pin placement grooves; and the wire is positioned in the base wire outlet. The power socket demultiplexer has the beneficial effects that the unique terminal riveting wire structure assembly replaces a PCB (printed circuit board) assembly with a complex process, the production cost is reduced and the terminal is of an integrated structure, so that the pseudo soldering phenomenon which is possibly generated due to welding in the prior art is avoided and the excellent and stable conduction performance is ensured; and by the positioning matching of a terminal positioning hole and a base positioning pillar, the assembling process is simpler, the assembling effect is better and the quality is more stable.

The invention discloses a novel AF camera module motor PIN connection method, which comprises the following steps: S1, hollowing the centers of VCM bonding pads on an FPC board to form a group of concave parts for the motor PINs on an AF camera module HOLDER to contact; S2, coating the surface of the motor PINs with a liquid conductive adhesive, and inserting the motor PINs into the concave parts of the VCM bonding pads; and S3, solidifying the liquid conductive adhesive by high-temperature heating to realize tight connection between the VCM bonding pads and the motor PINs. According to the method, the cost is saved, the rosin joints are avoided, and the product yield is improved. The hollowed-out bonding pads are designed in a stepped mode, excessive adhesive can overflow to the upper step of the hollowed-out bonding pads, and the conductive adhesive is prevented from overflowing to the board surface. The use amount of the conductive adhesive is controlled, the adhesive is drawn strictly according to the specified use amount, and excessive overflow of the conductive adhesive is prevented; and the FPC board surface around the bonding pads is coated with ink, so that the short circuit of the module cannot be caused even if a small amount of adhesive overflows.

The invention provides semitrailer bottom plate laser welding equipment. The semitrailer bottom plate laser welding equipment comprises a pair of lathe bed rails and a pair of trolley rails arranged between the lathe bed rails, a logistics trolley used for supporting a semitrailer bottom plate and a semitrailer frame is arranged on the trolley rails in a sliding mode; a pair of walking end beams are arranged on the lathe bed rails in a sliding mode, and a welding gantry beam and a lifting pressing mechanism used for fixing and pressing the semitrailer bottom plate are arranged between the two walking end beams; a welding head system capable of moving horizontally and going up and down is arranged on the welding gantry beam, and a flexible pressing wheel used for pressing the semitrailer bottom plate in a follow-up mode is arranged on the welding head system. According to the semitrailer bottom plate laser welding equipment, the gap between the semitrailer bottom plate and the semitrailer frame is reduced, laser self-fluxing penetration welding is achieved, the semitrailer frame and the bottom plate do not need to be turned over in the welding process, the labor intensity is reduced, and the production safety is improved.