12results about How to "Avoid desoldering" patented technology

The application relates to a welding jig which comprises a base assembly provided with a position-giving part, an upper pressing assembly provided with a pressing correction part and a locking mechanism, when the upper pressing assembly and the base assembly are locked, the pressing correction part forces the local part of a to-be-welded plate into the position-giving part, so that the plate generates a preset elastic deformation. The welding jig effectively overcomes the problem that the plate cannot be closely attached due to its own warping by forced deformation through the above structure, ensures the close contact of the plate, components and frames at the welding position, eliminates the welding gap, effectively avoids the virtual welding and false welding phenomenon, and significantly improves the welding quality and connection strength of the electronic assembly.

The utility model discloses a roll paper frame which comprises a roll paper cover, a fixing plate, a hanging plate and a paper tube hanging rod. Meanwhile, the roll paper cover is formed by combining two metal plates, namely an upper plate body and a lower plate body, a fixing plate is fixedly mounted on the lower plate body, and the paper tube hanging rod is connected with the fixing plate through a screw; meanwhile, the lug plate of the hanging plate is inserted into the inner cavity formed between the upper plate body and the lower plate body, and the lug plate is connected with the fixing plate, so that the hanging plate and the roll paper cover are connected into a whole, and the problem that when the hanging plate and the roll paper cover are connected in a welded mode, the hanging plate and the roll paper cover are easily subjected to unsoldering due to rusting is solved; and the requirement of stably mounting the tissue holder is met.

The application belongs to the technical field of battery welding, and discloses a welding device and a welding method for back contact batteries. The welding device for back contact batteries comprises a welding main body, a welding strip conveying unit, a battery piece transplanting unit and a welding unit. The welding main body is provided with a welding heat transfer carrier and a welding strip fixing member. The welding strip conveying unit sends a plurality of parallel welding strips with bus bars at both ends to the welding heat transfer carrier. The welding strip fixing member fixes the bus bars to prevent the welding strips from being straight. The battery piece transplanting unit can grab a plurality of battery pieces and press the back surfaces of the battery pieces to the welding strips on the welding heat transfer carrier. The plurality of battery pieces are arranged in parallel and at intervals along the extension direction of the welding strips. The welding unit is located below the welding heat transfer carrier. The welding unit can move back and forth in the vertical direction to weld the plurality of battery pieces and the plurality of parallel welding strips. The damage and scratches of the welding strips in the accommodating groove can be avoided. The welding rate and the heat dissipation rate of the welding strips are consistent, and false welding or welding separation is avoided.

This invention provides a chip flip-chip packaging method. A first solder is applied to the solder windows of a chip formed on a wafer, fixing the first end of a solder post to the solder window. A curing agent is filled between the solder posts. The solder posts are then ground so that their second ends are on the same plane, and a solderable layer is formed on the end face of the solder posts before the curing agent is removed. The second end of the solder post is fixed to a frame or substrate coated with a second solder, forming a potting gap between the second end of the solder post and the chip. Epoxy resin is then filled into the potting gap and encapsulates the chip. The melting point of the first solder is higher than that of the second solder. This invention uses solder posts on the chip solder window to create a potting gap between the chip and the frame or substrate. During a single epoxy resin filling, the epoxy resin flows directly into the potting gap and encapsulates the chip. Compared to processes requiring bottom filling with adhesive, this reduces the number of filling operations, lowers internal stress caused by varying degrees of curing of the adhesive with different filling operations, thereby simplifying production steps and improving production efficiency.

The application discloses a welding device for photovoltaic panel processing and relates to the technical field of photovoltaic panel welding.The device comprises an equipment mainframe, a mounting plate fixedly arranged on the equipment mainframe and a welding assembly arranged on the mounting plate; further comprises conveying mechanism one and conveying mechanism two, and the photovoltaic panel is placed on the conveying mechanism one.The device has the advantages that the amount of flux can be automatically adjusted according to the width of the welding rod, and the problems of residue, virtual welding and welding separation can be avoided; meanwhile, the device is provided with an automatic wiping structure, the surface impurities of the welding rod can be removed according to different specifications of the welding rod, the welding joint strength is improved, the double conveying, steering and clamping mechanisms are matched, the precise conveying, positioning and clamping of the photovoltaic panel are realized, the device is suitable for products of different specifications, the defective rate is reduced, the problems of poor adaptability of the traditional equipment, improper flux supply and insufficient cleaning of the welding rod are effectively solved, and the welding quality and production efficiency are greatly improved.

The utility model relates to multilayer ceramic capacitor technical field, concretely to a new multilayer ceramic capacitor with protection structure, include: support, the both ends tin soldering of support have capacitor body, the downside of support is equipped with two groups of support structure, the support structure includes first connecting piece, two groups first connecting piece are connected in the both ends of support bottom surface through tin soldering, the surface of first connecting piece integrative buffering piece has, the bottom of buffering piece integrative second connecting piece forms. The buffering piece of utility model setting is inclined and presents the zigzag shape structure, can reduce buffering piece's rigidity in vertical and left and right direction, improve the deformation sensitivity of support structure, and the bottom of two groups buffering piece is located left and right sides of support respectively, can increase the floor area of device, and then guarantee that device can stably place on the substrate, be convenient for translation activity and will not tip over, improve the convenience of welding.

The utility model discloses a high-voltage color LED lamp panel, and relates to the technical field of LED lamp panels. The LED lamp panel comprises an LED lamp panel main body, a plurality of lamp beads are installed on the front face of the LED lamp panel body, a plurality of linearly-arranged wires are welded to the wiring position of the back face of the LED lamp panel body, and a wire pressing device is fixedly connected to the back face of the LED lamp panel body. The line pressing device comprises a lower base fixedly connected to the back face of the LED lamp panel body and a pressing base installed at the top of the lower base, placement grooves are formed in the two ends of the lower base, shifting plates are fixedly connected to the bottoms of inner cavities of the two placement grooves, protruding blocks are fixedly connected to the opposite faces of the two shifting plates, and clamping hooks are fixedly connected to the positions, close to the two ends, of the bottom of the pressing base. The two ends of the lower base are rotationally connected with check blocks, and the inner sides of the check blocks are attached to the outer sides of the shifting plates. According to the utility model, the lower seat and the pressing seat are combined to fix the lead, so that the lead is effectively prevented from moving repeatedly to cause unsoldering, and the stable operation of an LED lamp panel is ensured.

The utility model belongs to the technical field of building foundation structures, and particularly relates to a laminated steel mesh strip-shaped foundation structure suitable for an assembly type rural house strip-shaped foundation. Comprising a necessary bearing platform, a foundation wall, embedded ribs and optional foundation beams. The bearing platform is composed of a first steel wire net frame and in-cavity concrete. The first steel wire net frame comprises a steel wire net, inserting wires, an edge sealing net film and reinforcing ribs. The foundation wall is composed of a second steel wire net frame, a heat preservation plate and in-cavity concrete. The second steel wire net frame comprises a main reinforcement net, a disassembly-free net film, a second inserting wire and a positioning clamping piece. The embedded ribs are longitudinally arranged in the foundation wall, and the upper ends of the embedded ribs are exposed. The problems that an existing foundation is tedious in construction, long in period, high in thermal bridge effect and poor in structural integrity are solved, formwork-free rapid construction is achieved through the prefabricated steel wire net frame, the thermal bridge effect is reduced through the heat preservation plates, the structural strength and durability are improved through cooperation of multiple components, the foundation beams can be selectively arranged according to the foundation conditions, and the construction efficiency is improved. And the method has remarkable practicability and economical efficiency.

The utility model provides a terminal housing structure of an electric energy meter, the electric energy meter comprises a hollow body and a circuit board arranged in the body, a terminal housing is arranged in the body and below the circuit board, the terminal housing comprises a plurality of accommodating grooves for accommodating current terminals, and the accommodating grooves are communicated with the circuit board. A wire is connected between the current terminal and the circuit board, a positioning fixture block used for positioning the wire is fixed at the position of the terminal shell, the positioning fixture block abuts against the lower end face of the circuit board, and the terminal shell structure can overcome the defects that in the prior art, a manual welding mode is tedious, and desoldering is prone to being caused.

The utility model relates to the technical field of laser welding, in particular to a laser welding device which comprises a laser system and a clamp, the laser system comprises a laser, an optical fiber, a focusing assembly and a positioning assembly, the laser is used for emitting a light beam, and the light beam sequentially passes through the optical fiber, the focusing assembly and the positioning assembly and then irradiates a to-be-welded part; the positioning assembly is used for adjusting the focusing position of the light beam on the to-be-welded part, and energy of the light beam is distributed in a flat-top mode. According to the technical scheme, the laser welding device can be adopted for welding the to-be-welded part, stable welding can be conducted on the premise that whether the to-be-welded part is pretreated or not, irradiation is conducted through high-energy-density light beams distributed on the flat top, an insulating layer on the surface of the to-be-welded part can be instantly gasified, fusion welding is conducted on the to-be-welded part, and the welding quality is improved. And pseudo soldering and unsoldering are effectively avoided, falling and aging caused by long-term use are prevented, the welding yield and the use reliability are improved, and meanwhile resistance increase can be avoided through the laser fusion welding mode.

This utility model discloses a center conductor assembly molding mold, including an upper mold, a lower mold, upper mold core one, upper mold core two, upper mold core three and an upper mold adjustment block installed in the upper mold, and lower mold core one, lower mold core two, lower mold core three and a lower mold adjustment block installed in the lower mold. During mold closing, pressure is applied from the upper mold to the lower mold, with the upper and lower mold cores corresponding to each other. The mold structure of this utility model can adjust the pin height of the center conductor assembly and increase the forming angle, causing plastic deformation of the pin forming area under pressure. This reduces the springback at the bending point of the center conductor and the stress release during the manufacturing process. Simultaneously, by adjusting the pin forming height, the three pins maintain a consistent end face height after slight springback, preventing desoldering and cold solder joints during the mounting / use of the center conductor assembly.

The utility model relates to a power supply with a built-in charger, which comprises a battery module, an upper shell and a bottom shell, a buckle is arranged on the top surface of the upper shell, a limiting plate is arranged at the top of an inner cavity of the upper shell, and a limiting strip is arranged at the joint of the limiting plate and the upper shell. The side, facing the battery module, of the limiting strip is in an arc shape matched with the battery module, the limiting plate divides the upper shell into an element bin and a containing bin, and a support is arranged in the area, corresponding to the containing bin, of the bottom of an inner cavity of the bottom shell. The power source is divided into the element bin and the containing bin for containing the battery module through the limiting plate, space utilization is reasonable, the limiting strips on the limiting plate are matched with the supports to limit the battery module, internal displacement of the battery module is prevented, the protection plate is arranged between the battery module and the side plate of the upper shell to play a buffering role, the anti-seismic performance of the battery module is improved, and the service life of the battery module is prolonged. And the protective sleeve is arranged on the charging and discharging interface, so that silt and water are prevented from entering the shell, and the device is suitable for field operation.