1262 results about "Soldering" patented technology

The invention relates to an intelligent visual identification technology-based cold solder joint microcrack intelligent discrimination method, which comprises the steps of collecting an initial RGB image of a to-be-detected welding spot, carrying out two-dimensional discrete cosine transform and inverse two-dimensional discrete cosine transform on the initial RGB image to obtain an enhanced image, and fusing the enhanced image with an R channel of the initial RGB image to obtain a fused image; forming a dual-channel feature map; calculating the phase consistency of the dual-channel feature map, and obtaining a suspected candidate region of the pseudo soldering microcrack through an adaptive threshold segmentation method; acquiring an RGB image sequence of a continuous time sequence of the welding spots, and performing anomaly detection to obtain an abnormal region set; and constructing a welding spot thermal diffusion model, and inputting the geometric parameters and the environmental parameters in the abnormal region set into the welding spot thermal diffusion model to obtain a final judgment result of the pseudo soldering microcracks. According to the method, through multi-dimensional feature fusion and continuous time sequence dynamic tracking, the detection precision of the pseudo soldering microcracks is remarkably improved, the false detection rate is reduced, and the final judgment result is more accurate.

The invention relates to a tin ring automatic focusing laser soldering tin fixing and 3D welding spot detecting system, and belongs to the technical field of industrial automatic laser processing. The system is characterized in that a tin ring preparation module identifies pins in real time and dynamically optimizes winding parameters through visual positioning and a self-adaptive winding head, and performs defect identification and pre-repair analysis through multispectral imaging; the soldering tin positioning module is used for switching stations through a rotary table, and precise positioning and clamping of a product are realized by combining laser contour sensing and a focusing compensation algorithm; the laser tin soldering module can visually identify tin materials and automatically call welding parameters, laser power and action time are regulated and controlled in real time by establishing a regional heat conduction model, and gradient cooling is implemented after welding; and the 3D detection module adopts dual-mode scanning, constructs a welding spot three-dimensional model based on fusion data, recognizes microcracks through super-resolution processing, and discriminates the welding spot quality. And automation and intellectualization of the whole process from tin ring preparation to welding spot quality detection are achieved.

The invention relates to the field of photovoltaic cell production, and discloses a main-grid-free photovoltaic cell series welding method and main-grid-free photovoltaic cell series welding device.The method comprises the steps that main-grid-free photovoltaic cell pieces and welding strips are conveyed to a pre-welding device, heating is conducted, so that the welding strips are pre-fixed to the surfaces of the corresponding main-grid-free photovoltaic cell pieces, and cell series arrays are obtained; synchronously transmitting the battery series and the back film layer to a heating and pressurizing device, and laying a front film layer on the battery series; and controlling the heating and pressurizing device to move to be in contact with the front film layer on the battery string, and heating and pressurizing the front film layer to obtain the battery string. The method comprises the following steps of: pre-fixing a battery piece and a welding strip, laminating, and heating and pressurizing a front film layer. During heating and pressurizing, a hold-down tool does not need to be placed on the front face, uneven heating is avoided, the problems of film bubbling and pseudo soldering are avoided, the welding quality can be guaranteed, and the conditions of pseudo soldering and grid breaking are reduced. And heating and pressurizing are carried out after pre-welding, so that the solder strip can be prevented from deviating.

The invention discloses electronic detonator spot welding defect detection equipment which comprises a bottom bearing plate, a telescopic fixing structure is arranged at the upper end of the bottom bearing plate, a circulating feeding structure is arranged in the telescopic fixing structure, and a testing structure is arranged at the upper end of the telescopic fixing structure. The telescopic fixing structure comprises side supporting plates symmetrically and fixedly arranged on the top face of the bottom bearing plate. According to the electronic detonator spot welding defect detection equipment provided by the invention, the telescopic fixing structure is arranged, and two groups of transverse electric push rods which are symmetrically arranged drive clamping plates at the upper ends to get close to each other, so that electronic detonator control plates with different sizes on the surface of the top plate can be fixed; and meanwhile, a longitudinal electric push rod is matched to drive a test meter and a test needle head on the top to descend to be in contact with a welding spot on the surface of the control panel, so that whether the welding spot has pseudo soldering or not can be detected, compared with an existing detection device, the detection efficiency of the control panel can be effectively improved, and meanwhile higher adaptability is achieved for control panels of different sizes.

The invention discloses a secondary welding jig of a power module, and relates to the technical field of power module welding, the secondary welding jig of the power module comprises a bottom plate and a limiting assembly, positioning tools are symmetrically arranged at the top of the bottom plate, welding piece positioning pieces are arranged in the positioning tools, and fixing assemblies are connected to the four ends of the top of the bottom plate; the outer side of the lower portion of the fixing assembly is sleeved with a first contact pin positioning plate, the outer side of the upper portion of the fixing assembly is sleeved with a second contact pin positioning plate, and through holes are formed in the first contact pin positioning plate and the second contact pin positioning plate. According to the invention, the positioning tool cooperates with the soldering lug positioning sheet and the pin positioning plate to realize accurate alignment of the substrate, the DBC and the Pin, meanwhile, the rapid connection structure between the limiting assembly and the second pin positioning plate improves the efficiency of transplanting the Pin, and then one-time molding welding is carried out through the sintering furnace, so that the production steps and manual intervention are significantly reduced, the power module assembling efficiency is improved, and the production cost is reduced. And meanwhile, the process complexity and the manufacturing cost are reduced.

The invention discloses a tin-based alloy preformed soldering lug and a preparation method thereof.The preparation method comprises the following steps that a copper fiber reinforced framework with gradient density distribution is prepared, the copper fiber reinforced framework comprises a high-density area and a low-density area, and hollowed-out gaps are formed through a weaving technology; tin-based slurry with different components and functions is prepared from outer-layer slurry with tin-antimony-copper-nickel as a main body, middle-layer slurry with tin-antimony-copper as a base body and inner-layer slurry with tin-antimony-copper rare earth as a base body, the three kinds of tin-based slurry are sequentially filled into preset areas of hollow-out gaps of a reinforced framework, and a gradient structure material is formed; the gradient structure material is subjected to press-fit forming and post-treatment, and a preformed soldering lug is obtained; a framework is firstly built, then materials are filled, and copper fibers in the soldering lugs provide good support and heat conduction channels, so that a gradient transition structure with continuous change of components and performance is realized, and the integrity, the impact resistance and the bonding strength of the materials are greatly enhanced.

The invention discloses a high-speed cable welding spot pseudo soldering detection device and method, and the device comprises a product fixing mechanism which is used for fixing a high-speed cable; the movement mechanism comprises an X-direction movement module and an oblique movement module mounted at the moving end of the X-direction movement module; according to the invention, the visual inspection mechanism is used for identifying the actual position of a welding spot and compensating a test point in real time, so that the positioning error caused by poor repeated precision of manual feeding and part tolerance is thoroughly eliminated, a test pen point can be accurately aligned with each welding spot, and the consistency and accuracy of detection are ensured from the source; the pressure sensor and the displacement sensor are adopted to synchronously collect data, judgment is performed by analyzing the slope of a pressure-displacement curve, the unique mechanical property mutation of the pseudo soldering point can be sensitively captured, the judgment basis is scientific and objective and is far superior to qualitative judgment manually based on hand feeling and experience, and the detection result is extremely reliable.

According to the welding machining device and method for the inner net and the outer net of the filter, the welding machining device comprises the machining machine table, the lifting mechanism, the moving mechanism, the roller electrode, the shaft electrode and the hooping mechanism, and complex spatial spiral movement is simplified into single axial movement of the roller electrode in a joint channel; an expensive and complex high-precision multi-axis linkage numerical control system is not needed, only one common motor is needed to drive a roller electrode to linearly walk along a joint channel, inclined joint welding of the filter metal net is completed, a workpiece can be driven to rotate in a pure mechanical mode, the cost is low, the welding efficiency is high, and through a micro forging and pressing mode in advance, the welding efficiency is high. According to the method, a solid metal strip with the width of about 1-2 mm and without through holes is formed, and the solid strip provides a continuous and uniform contact surface for a subsequent roller electrode, so that a constant resistance and ideal current path is provided, controllable and predictable generation of welding heat is realized, and the problems of pseudo soldering and overburning caused by meshes are greatly reduced.

The invention relates to the technical field of material detection, and discloses a graphics card welding spot pseudo soldering automatic detection method based on image recognition, and the method comprises the steps: firstly comparing a graphics card visible light image after gray level normalization with an infrared thermal distribution diagram after noise suppression, and obtaining the surface texture and thermodynamic characteristics of a welding spot; and then splicing the two to obtain an associated feature weight matrix, extracting texture and thermodynamic feature vectors of a welding spot region from the associated feature weight matrix, and splicing the texture and thermodynamic feature vectors into a fusion feature matrix according to channel dimensions. And finally, positioning pseudo soldering spot coordinates in combination with the standard soldering spot feature library, and generating a graphics card soldering spot pseudo soldering defect report according to the coordinates and the texture fracture index. According to the process, through multi-feature fusion and comparison, pseudo soldering accurate detection and report generation are achieved; according to the method, the accuracy and the efficiency of insufficient solder detection of the graphics card welding spots based on image recognition can be improved, and a high-precision automatic solution is provided for quality detection of the graphics card welding spots.

The invention provides a high-reliability silver-free AMB ceramic substrate and a preparation method thereof, and the preparation method comprises the following steps: (1) arranging silver-free active metal modified layers on the upper and lower surfaces of a ceramic substrate, and obtaining the ceramic substrate with the silver-free active metal modified layers; and (2) assembling the ceramic substrate with the silver-free active metal modified layer and two copper sheets into a sandwich structure, and performing brazing welding to obtain the high-reliability silver-free AMB ceramic substrate. High-temperature welding is carried out after the silver-free active metal modified layer is arranged, effective bonding between copper and ceramic is achieved, a good metallurgical bonding interface is formed, the high-reliability silver-free AMB ceramic substrate is obtained, the preparation cost is low, and the high-reliability silver-free AMB ceramic substrate is suitable for large-range application and popularization.

The invention provides a photovoltaic solder strip, a solar cell string, a welding method of the solar cell string and a photovoltaic module, the photovoltaic solder strip comprises a solder strip base body, the solder strip base body is provided with a welding area, the outer surface of the solder strip base body is coated with a passivation layer, and the passivation layer is arranged on the outer surface of the solder strip base body. A conductive tin layer is arranged on at least part of the surface of one side, far away from the photovoltaic welding strip, of the passivation layer corresponding to the welding area, the conductive tin layer comprises fluoride or phosphide, the conductive tin layer corrodes the passivation layer after being heated to form a connecting through hole, and the conductive tin layer permeates into the connecting through hole to be in butt joint with the welding strip base body. The invention has the advantages of low cost, strong conductivity, good light collection effect and long service life.

The full-automatic efficient assembly production line comprises a main body structure, a plurality of guiding and conveying structures, a plurality of stirring structures and a discharging structure, the guiding and conveying structures are detachably arranged on the main body structure, the stirring structures are detachably arranged on the main body structure, and the discharging structure is arranged on the main body structure. The solar photovoltaic screen printing device relates to the technical field of solar photovoltaic equipment, and has the beneficial effects that the solar photovoltaic screen printing device is high in adaptability, capable of being compatible with photovoltaic screens of multiple specifications, high in practicability, high in practicability and high in practicability. The welding material conveying position accurately corresponds to different welding point positions of the screen printing plate; and the automation degree is high, continuous welding machining is achieved, manual intervention is reduced, positioning is accurate, the position deviation of soft soldering tin is reduced, feeding is stable, and the requirement for multiple welding point positions is met.

The invention discloses a dynamic calibration method for precise stamping preparation of a gold-based soldering lug based on multi-mode laser positioning, and belongs to the technical field of high-precision brittle gold-based soldering lug manufacturing. Comprising the following steps that a strip roll material is fed into a machining table top, and a welding strip is positioned through positioning laser; visual data of the edge of the strip coil stock and the multi-stage combined stamping head are obtained, and the pre-stamping offset of the edge of the strip coil stock and a rough stamping head in the multi-stage combined stamping head is calculated; the pre-punching offset is transmitted to a displacement compensation table and a multi-stage combined punching head for displacement compensation; rough punching is conducted on the strip roll material through a rough punching head, and the gold-based soldering lug is fixed; collecting an edge image of the gold-based soldering lug after rough punching, and calculating an edge trimming amount; and the edge finishing amount is transmitted to a red laser finishing device in the multi-stage combined punching head for fine punching. Through multi-stage stamping and post-stamping laser trimming, visual identification and a trimming amount algorithm are combined, and the machining precision of + / -5 [mu] m level of the X-Y axial surface can be achieved.

The invention belongs to the technical field of welding, and discloses a welding robot system, a chip welding method, a chip welding device and a computer storage medium, the welding robot system comprises a calibration module used for bearing a calibration plate, and the calibration plate calibrates a bonding pad to obtain a three-dimensional coordinate of the bonding pad; the mechanical arm is arranged adjacent to the calibration module; the detection module is arranged adjacent to the mechanical arm and the calibration module and is used for collecting sensor data so as to determine a height sequence of welding spots, a temperature field distribution diagram of a welding area and defect characteristics of the to-be-welded chip in combination with the three-dimensional coordinates; and the main control unit is electrically connected with the detection module and / or is in signal connection with the detection module, and is used for carrying out feature fusion and determining welding laser power and a welding speed adjusting instruction according to the obtained multi-sensor fusion features to obtain a preset welding track so as to control the mechanical arm to execute the preset welding track. According to the method, submicron heterogeneous material calibration, thermal interface cooperative control, cross-material process rapid adaptation and multi-modal interface reliability evaluation can be realized.

The invention relates to a battery piece welding method, a solar battery string and a photovoltaic module. The back surface of the battery piece comprises main gate electrodes which are alternately arranged at intervals and fine gate electrodes which are distributed in an interdigital mode, the fine gate electrodes intersect with the main gate electrodes with the same polarity as the fine gate electrodes, the intersection positions are marked as metal contact points, and insulating glue is arranged between the fine gate electrodes and the main gate electrodes with the opposite polarity as the fine gate electrodes; the welding method comprises the following steps that a welding strip is obtained, the welding strip comprises a first surface, a second surface and two opposite side faces, the first surface and the second surface are oppositely arranged in the thickness direction, the two opposite side faces are located between the first surface and the second surface, and the two opposite side faces are gradually narrowed in the direction from the first surface to the second surface; and enabling the second surface of the welding strip to be in contact with the metal contact point, and welding the welding strip and the metal contact point. The battery piece welding method is beneficial for reducing the risk of short circuit caused by the fact that the welding strip punctures the insulating glue.

The invention relates to the field of pipeline welding devices, in particular to a high-density polyethylene pipe hot melting welding device which comprises a support frame, two guide rods symmetrically arranged front and back are fixedly installed on the support frame, and a butt joint mechanism used for moving two polyethylene pipes is jointly arranged on the guide rods and the support frame. The butt joint mechanism comprises a first arc-shaped seat, a second arc-shaped seat, a third arc-shaped seat and a fourth arc-shaped seat which are jointly arranged on the two guide rods from left to right. The driving assembly is adopted for driving the semicircular frames which are combined together to move from the polyethylene pipe on the right portion to be connected to the two polyethylene pipes in a bridging mode at the same time; the left polyethylene pipe is actively adjusted to be coaxially arranged with the right polyethylene pipe in the pre-butt-joint process, meanwhile, in the moving process of the semicircular frame, the driving assembly drives the semicircular frame to rotate around the polyethylene pipe in the circumferential direction, rolling extrusion and shaping rounding are conducted on pipe openings through the rotating rollers, the goodness of fit and welding firmness of butt-joint faces are effectively improved, and the butt-joint quality is improved. Therefore, the welding quality is obviously improved.

The invention relates to the technical field of automation, in particular to an electronic element automatic tin soldering testing device which comprises a tin soldering unit and a testing unit, a material receiving and transferring mechanism is arranged between the tin soldering unit and the testing unit, and the tin soldering unit is used for tin soldering of an electronic element. After tin soldering is completed, the electronic components are transferred and conveyed to the testing unit through the material receiving and transferring mechanism, the testing unit comprises a voltage withstanding testing mechanism, a testing and transferring mechanism, an interlayer testing mechanism and a comprehensive testing mechanism, and the voltage withstanding testing mechanism is used for grabbing the electronic components from the material receiving and transferring mechanism and then positioning the electronic components to conduct voltage withstanding testing on the electronic components; and after completion, the test transfer mechanism sequentially transfers to the interlayer test mechanism and the comprehensive test mechanism for testing. According to the invention, the accuracy and integrity of the soldering tin quality and the electrical performance detection of the reactor are improved, the quality of the reactor leaving a factory is effectively guaranteed, and the subsequent fault risk caused by welding or performance defects is reduced.

The invention relates to the related technical field of welding control, in particular to a sensor pin welding control method and system.The sensor pin welding control method comprises the steps that according to a sensor pin, welding environment parameters are obtained, basic welding parameters are determined, a welding control parameter matrix is set in combination with a first welding execution instruction sequence and a second welding execution instruction sequence, and a welding path is dynamically corrected; and meanwhile, welding process restarting and welding spot forming quality compensation after basic welding parameter correction are carried out according to the dynamic back-off welding execution path. The technical problems that a preset fixed track is adopted in a welding path, sensor pin assembly errors cannot be effectively compensated, and pseudo soldering and false soldering risks exist are solved, basic welding parameters are determined, welding conditions are accurately matched with material characteristics and a real-time environment, the welding path is dynamically corrected in combination with a welding control parameter matrix, and the welding quality is improved. And after parameter correction, process restarting and welding spot forming quality compensation are carried out, and the technical effects of improving the welding yield and the product consistency are achieved.

The invention discloses a scraper mechanism, scraper printing equipment and a method for automatically detecting, compensating and adjusting pressure during printing, which are used for solving the problems that when the existing scraper printing equipment is used for printing a printing steel mesh with a concave-convex surface structure, a large amount of solder paste, soldering flux and other materials are remained on the printing steel mesh due to different blade coating pressure of the scraper mechanism, and the printing quality is influenced. And the printing effect is not good. The scraper mechanism comprises a control system, a rack, a pressure detection assembly, a lifting driving assembly, a connecting plate and a scraper body. The lifting driving assembly is mounted on the rack, and the lifting driving assembly is connected with the connecting plate through the pressure detection assembly; wherein the pressure detection assembly comprises a pressure sensor, one end of the pressure sensor is connected with the connecting plate, and the other end of the pressure sensor is connected with the scraper body; the pressure sensor and the lifting driving assembly are both electrically connected with the control system.

The invention relates to the technical field of infrared receiving head production, in particular to an auxiliary tin soldering device for an infrared receiving head. The invention provides an auxiliary tin soldering device for an infrared receiving head, which can be used for accurately butting the receiving head with a cable. An auxiliary soldering device for an infrared receiving head comprises a bottom plate, mounting racks, a mounting plate, an air cylinder, a welded pipe, a positioning plate and the like, the mounting racks are vertically and fixedly connected to the bottom plate, one mounting rack is fixedly connected with the mounting plate, a material rack is fixedly connected to the mounting plate, the air cylinder is fixed to the side face of the material rack, a telescopic rod of the air cylinder is fixedly connected with the welded pipe, and the end of the welded pipe is slidably connected with the positioning plate. The air cylinder drives the welded pipe to move up and down in a reciprocating mode, the welded pipe can drive the rotating wheel to rotate intermittently through the connecting rod, the rotating wheel drives the cable clamped on the conveying belt to be in butt joint with the infrared receiving head, then the welded pipe welds the cable and the infrared receiving head, and when the welded pipe is driven by the air cylinder to move upwards and reset, the rotating wheel is driven again to rotate. And the automatic feeding effect of the cable is achieved.

To provide a soldering device that can accurately control heating-intensity that is required in soldering, so that high-quality soldering can be performed.SOLUTION: A soldering device 100 described in the disclosure, which joins two or more members to be joined with solder 21, comprises: a heating part 1 that heats soldering sites P of the members to be joined; a resistance measuring part 3 that measures resistance between the members to be joined and the solder 21; and a control part 5 that controls heating-intensity of the heating part 1. When resistance measured by the resistance measuring part 3 falls below a certain value, the control part 5 increases the heating-intensity of the heating part 1.SELECTED DRAWING: Figure 3

The invention is suitable for the field of photovoltaic technology, and provides a battery assembly and a photovoltaic system, and the battery assembly comprises a battery piece which comprises a plurality of grid lines; according to the solar cell, the welding layer arranged between the grid line and the welding strip of the solar cell is optimally designed, on one hand, the size of the welding layer is optimally designed, and the ratio of the size of the welding layer to the size of the welding strip is set to be larger than 1 and smaller than 3; on the one hand, the welding layer structure is optimally designed, the welding layer is divided into two parts to be arranged, the first conductive part is arranged between the grid line and the welding strip, welding connection of the welding strip and the grid line is achieved, and the welding efficiency is improved. And the second conductive part is arranged on the outer side of the welding strip, so that the deviation window of the welding strip is enlarged, the phenomena of pseudo soldering and unsoldering of the welding strip are avoided, and the reliability of the assembly is improved.

The utility model discloses a pin tin soldering device based on differential mode PFC and inductor PFC, and relates to the technical field of pin tin soldering. The pin tin soldering equipment based on the differential mode PFC and the inductor PFC comprises a bottom plate, a supporting table is fixedly installed above the bottom plate, a limiting mechanism used for limiting the positions of a coil and a substrate is installed above the bottom plate, a tin soldering mechanism used for tin soldering is fixedly installed above the supporting table, and a tin soldering mechanism used for tin soldering is installed above the supporting table. The limiting mechanism comprises a stepping motor fixedly installed in the center of the bottom plate, brackets are installed at the four corners of the supporting frame, limiting blocks are installed at the four corners of the supporting frame, element fixing, fixed pin tin soldering, inductor pin tin soldering and taking-down after tin soldering can be conducted at the same time in the four directions of the supporting frame, and the supporting frame is fixed to the top end of a rotating shaft of the stepping motor. And the rotating angle of the supporting frame is adjusted through the stepping motor, so that the four corner areas of the supporting frame are moved into the next working area, and the efficiency is improved.

The utility model relates to the technical field of welding furnaces, and provides a vacuum welding furnace which comprises an upper cavity, a lower cavity, at least one lower heating pipe and a lifting mechanism. The upper cavity is arranged above the lower cavity, the upper cavity and the lower cavity form a vacuum cavity, the lower heating pipe is arranged in the lower cavity, guide columns of the lifting mechanism are arranged on the periphery of the lower cavity, and the upper cavity is movably arranged on the guide columns of the lifting mechanism. And a large space height in the cavity is adapted to a large-size sample.

This invention discloses a method for manufacturing a flexible circuit board and a flexible circuit board, relating to the field of integrated circuit manufacturing technology. The method includes the following steps: providing a flexible copper-clad laminate (CCL) having a pre-processed area; drilling holes in the CCL to form positioning holes, the positioning holes partially overlapping with the pre-processed area and forming a semi-circular notch in the overlapping area; providing a punching die to punch the flexible CCL, the area covered by the projection of the punching die along the punching direction forming a first projection pattern, the first projection pattern partially overlapping with the pre-processed area and forming a pad half-hole in the overlapping area, the pad half-hole completely covering the semi-circular notch, and the sidewall of the pad half-hole forming a sidewall copper-plated area. By forming a larger sidewall copper-plated area formed by the sidewall of the pad half-hole, sufficient and stable solder volume can be provided for soldering, reducing the risk of cold solder joints and improving the yield of integrated circuit manufacturing, production of dedicated lithography machines, and etching machines.

The application discloses a method for preparing an indium-based soft soldering sheet by vacuum hot pressing, belongs to the technical field of thermal interface materials for chip packaging and IGBT power module welding material preparation, and is characterized in that pure indium powder or indium-tin mixed alloy powder is uniformly laid in a graphite mold, the graphite mold is vibrated or knocked, and the pure indium powder or indium-tin mixed alloy powder is laid flat and densely; the graphite mold is fixed in a vacuum hot pressing machine, a pressure of 10 MPa is applied to the vacuum hot pressing machine, vacuum is drawn to 1*10 ‑3 Pa, a temperature rising rate is controlled to be less than 5 DEG C / min, when the temperature rises to the melting point of indium or the melting temperature of the indium-tin mixed alloy, a pressure maintaining state is kept for 0.5-1 hours, then the mold is cooled to room temperature along with the furnace, the mold is taken out, and a pure indium soldering sheet or an indium-tin-based multi-element alloy soldering sheet is obtained. The method has simple process and low energy consumption, and the performance of the prepared soft thin soldering sheet is obviously improved.

The utility model discloses a miniature tin dipping machine, which relates to the field of tin dipping machine structures and comprises a base, a two-shaft transplanting device arranged on the base, a hot tin device arranged on the base, a tin dipping device arranged on the two-shaft transplanting device and above the hot tin device, and an electric control device arranged on the base. The control device is electrically connected with the two-shaft transplanting device, the hot tin device and the tin immersion device; according to the micro tin dipping machine, automatic control of the micro tin dipping machine is achieved through the electric control device, so that the tin dipping efficiency is improved, meanwhile, parameter consistency in the tin dipping process can be achieved, and then the stability of the tin dipping quality of products is improved.

The utility model relates to the technical field of soldering flux production, and discloses a PH tester for soldering flux production, which comprises a testing machine body and is provided with a testing disc, a plug, an air cylinder, an air cylinder ejector rod, a liquid inlet pipe, a first three-way pipe, a liquid outlet pipe, a first valve, a connecting pipe, a second valve and a spray head, and a suction pump is started to suck soldering flux into the liquid inlet pipe; the first valve is closed, the second valve is opened, the scaling powder enters the connecting pipe after passing through the first three-way pipe and is finally sprayed out of the spray head and enters the testing disc, the PH value of the scaling powder is detected through the tester, after detection is completed, the air cylinder is started, the air cylinder ejector rod retracts, the plug does not block the testing disc any more, and the scaling powder is discharged from the liquid discharging assembly; and if the scaling powder enters the liquid outlet pipe, the second valve is closed, the first valve is opened, the scaling powder enters the liquid outlet pipe, the scaling powder is directly filled by the filling device, and compared with the prior art, the sampling operation process of workers can be reduced, and the production progress is accelerated.

The utility model relates to the technical field of resistance welding, in particular to a sheet metal part, a welding assembly, a household appliance and a stamping device. The boss is connected to the plate body and comprises a transition section and a connection section, the transition section surrounds the connection section, one end of the transition section is connected to the plate body, and the connection section is connected to the other end of the transition section. On the section which is perpendicular to the plate body and passes through the center of the boss, the distance between the two side walls of the transition section is gradually decreased in the direction away from the plate body, and the included angle between the two side walls is an obtuse angle. The included angle formed by the two side faces of the transition section is an obtuse angle. The obtuse angle is formed in the punch forming process of the boss, so that stress concentration at the boss can be reduced, and the situation that the sheet metal part is cracked by tension is reduced. Under the condition that the protruding height of the boss is fixed, the taper angle formed by the stamping face at the corresponding position of the boss is large, the size of a melting core between welding pieces is large, the large connection strength can be improved, and the phenomenon that pseudo soldering is formed between the welding pieces is reduced.

The utility model discloses an electromagnetic solenoid based on composite conduction, which relates to the technical field of electrical connection and comprises a framework and a coil wound on the framework. The lug plate is fixed at one end of the framework and is used for being welded with an outgoing line of a coil; the elastic sheet is fixed at one end of the framework and is used for being electrically connected with external equipment; the elastic sheet is provided with a first contact and a welding surface, and the elastic sheet is in local extrusion contact with the lug plate through the first contact and is in local welding connection with the lug plate through the welding surface. By adopting the scheme, the wiring sheet can be prevented from circuit break failure caused by pseudo soldering and solder skips through a composite mode of combining extrusion contact conduction and welding connection conduction.