69results about How to "Save solder" patented technology

The invention relates to a method for preplacing adhesive tape brazing filler metal for honeycombs. The method comprises the step of pressing the adhesive tape brazing filler metal (21) that is placed on a honeycomb baseplane into honeycomb core grids with a special device by a rolling method. The special device consists of a base (1), guide posts (2), four springs (3), a pressing plate (4), an upper roller (5), a lower roller (6), a supporting plate (7), four locking plates (8), four compression nuts (9) and a rocker arm (10). The method further relates to a special device for preplacing the adhesive tape brazing filler metal for the honeycombs. The method and the special device are applicable to the sector honeycombs 22 and the circular honeycombs 30 in different core grid dimensions. The adhesive tape brazing filler metal 21 can be pressed into the honeycomb core grids without crushing the honeycombs, and the preplaced brazing filler metal is consistent in thickness and clean and is firmly bonded with the core grids, so that each core grid is provided with the adequate brazing filler metal, and good and stable brazing quality is achieved; and in addition, the brazing filler metal can be saved, the cost can be lowered, and the working efficiency can be improved by more than 2 times.

The invention discloses a header cold water pipe open communication heat absorption heat exchanger and a manufacturing process of the header cold water pipe open communication heat absorption heat exchanger. The header cold water pipe open communication heat absorption heat exchanger at least comprises two heat supply pipes, wherein two ends of the heat supply heats are respectively welded with a header, at least one cold water channel is arranged inside a heat supply pipe cavity, ports at two ends of the cold water pipe channel are communicated in open cavity mode, and deposited scales in a cold water pipe can be conveniently cleaned by poured acid liquor. The cold water pipe stores water and absorbs heat, effective heat sources can be fully utilized, the heat is quickly absorbed through multiple dividing walls, the heat is transmitted in step mode, a heat absorption area is enlarged, and due to the fact that water is stored in the headers, the length of flow path of cold liquor is increased, the time of heat exchange is prolonged, heat loss is reduced, and heat exchange efficiency is improved. Longitudinal or transverse flexible installation is achieved by reasonable utilization of space, requirements of users can be met, materials are saved, and production cost is reduced. Product quality is stable and reliable, and service life is prolonged. The same kind of metal material is adopted, the weight is light, transportation is convenient, and logistics transportation cost is saved.

The invention discloses a cast-welding method for lead-acid storage battery tabs. The cast-welding method comprises the following steps that a storage battery pole plate is placed on a cast-welding mold which is at least provided with a mold cavity; a certain amount V of molten lead liquid is injected to the side face or the bottom of the mold cavity through a communicating tube, and the lead liquid amount V is the lead liquid amount needed for tab welding in the cast-welding mold; a lead rod and an induction heating device are arranged at an inlet of the communicating tube; the induction heating device quickly heats a section of lead rod to form lead liquid, and the lead liquid drops into the communicating tube and injected into the mold cavity; and then tab cast-welding operation is conducted. According to the cast-welding method for the lead-acid storage battery tabs, cast-welding lead liquid is supplied quantitatively through pipeline lead supplying, and the requirement for the lead liquid amount for cast-welding of a set of battery tabs in the mold is met; lead rod induction heating is used for lead liquid conveying, and quantitative material supply is achieved, so that the method has the advantages of power saving, environmental protection, welding material saving and the like.

The invention relates to a double thread submerged arc welding technology that includes the following steps: selecting primary welding parameter: adopting double thread submerged arc welding method; selecting welding method according to leg height k; selecting welding thread diameter phi according to k, selecting 2mm B23K 9/18 B23K 9/095 B23K 35/04 0 3 2 2006/6/20 101092003 2007/12/26 000000000 Xidian Transformers Co., Ltd., Xi'an Xi-an 710077 Zhai Weidong You Yu xubeng 61211

The invention aims at providing a heat dissipation structure of an LED lamp backlight device, and an LED lamp which has the heat dissipation structure has the advantages of the prolonged service life, the improved luminous efficiency and the ensured imaging quality of a liquid-crystal display panel. In the heat dissipation structure of the LED lamp backlight device, the LED lamp backlight device comprises a lamp strip which is provided with at least one LED lamp as well as a positive pin and a negative pin that are used for supplying power for the LED lamp; the positive pin and the negative pin of the heat dissipation structure are connected with a heat conducting part by material which can conduct heat, but is insulative.

The invention discloses a special seam welding technique for continuous electric resistance welding of silver strips and copper strips, which comprises following steps of: a, flatting whole rolls of the copper strips and aligning the copper strips to joint with the silver strips; b, towing the copper strips and sliver strips to pass through a clearance between a first electrode wheel and a second electrode wheel of the seam welding machine, wherein the first electrode wheel is a molybdenum electrode wheel or a tungsten electrode wheel, and the second electrode wheel is an alloy copper electrode wheel; c, clamping the copper strips and the sliver strips by using the first electrode wheel and the second electrode wheel to make the first electrode wheel contact with the silver strips and the second electrode wheel contact with the copper strips; d, towing the silver strips and copper strips to move continuously and introducing welding current for electric resistance welding between the first electrode wheel and the second electrode wheel. The contact surfaces of the copper strips and the silver strips can be fused at the same time by using the technique of the invention so as to form favorable molten area for welding. Then the seam welding between copper strips and sliver strips can be implemented. Welding parts of the copper strips and the silver strips are firm, stable and non-deforming, thereby the welding quality is ensured, soldering flux is ensured, and the welding effect is improved.

The invention discloses a vacuum brazing paste solder free of brazing flux, a preparing method and a using method of the solder, relates to a paste solder free of brazing flux for vacuum brazing aluminum matrix composites, a preparing method and a using method of the solder, and aims at solving the problems that it is difficult to weld and operate members in a complex shape with a foil solder, automatic production is hindered, and the brazing flux of the existing paste solder is stacked in brazing seams and cannot be discharged out, resulting in electrochemical corrosion at welding beams and lowering of performance of welded joints. The paste solder is prepared by mixing solder alloy powder and a binding agent and is free of brazing flux. The preparing method comprises the steps of preparing the solder alloy powder and the binding agent, and mixing the solder alloy powder and the binding agent in a proportion to obtain the vacuum brazing paste solder free of brazing flux. The using method comprises the steps of adopting a brush for brushing the paste solder onto the surface of a composite, and then putting the composite in a vacuum furnace for welding. According to the vacuum brazing paste solder, the preparing method and the using method, in addition to the reduction of cost and simplification of operation, the intensity, air impermeability and safe reliability of the welded joints are also improved.

The invention relates to a method for preventing siphoning effect in a terminal. The terminal of the invention comprises a conductive portion connected to an external component by a solder and a connecting portion extended to form the conductive portion. An exposed and easily oxidized copper is attached on the surface of the connecting portion, and the copper can be further oxidized to form oxide of copper. Since the copper is attached on the connecting portion of the terminal, and the copper can be oxidized to form oxide of copper, the oxide of copper, such as copper oxide, can prevent the siphoning of the solder from the conductive portion to the connecting portion during the soldering process. Accordingly, the solder can be saved, and the phenomenon of false welding can be avoided, such that the quality of soldering can be maintained well and the production cost can be reduced.

The invention discloses a device and method for uploading a soldering paste of a metal honeycomb carrier. The device comprises an air pressure propelling device used for uploading the soldering paste, and a soldering paste negative pressure recovery device. The method is a method that brazing is carried out by coating the soldering paste after rolling and forming, and the method comprises the following steps: rolling a flat wave strip into the metal honeycomb carrier; placing the formed metal honeycomb carrier on the air pressure propelling device used for uploading the soldering paste, so as to push the soldering paste into the metal honeycomb carrier; placing the metal honeycomb carrier filled with the soldering paste upside down to be delivered into the soldering paste negative pressure recovery device to recycle redundant soldering paste; and finally placing the metal honeycomb carrier containing small amount of soldering paste in clearance into a vacuum brazing room to be welded. The device for uploading the soldering paste of the metal honeycomb carrier is reasonable in structure design, and the method is simple and feasible, so that not only the soldering paste cannot generate plugged holes in a carrier pore canal, but also the condition that the soldering paste is discharged and pressed can be reduced, and soldering flux is saved, thereby rational utilization of resources can be achieved, and meanwhile, the welding strength is improved, and the quality of products is guaranteed.

The invention discloses a network filter. The network filter comprises a shell, PINs and induction coils, a grooves is formed in the shell, the induction coils are arranged in the groove, multiple wire clamping grooves communicated with the groove are formed in the parts, at the two sides of the groove, of the shell, and coil lead wires of the induction coils are arranged in the wire clamping grooves. Multiple installation through holes are formed in the edge of each wire clamping groove, and the PINs are fixedly connected in the installation through holes. The ends of the coil lead wires are pressed tightly and fixed through the PINs and the inner walls of the wire clamping grooves, and the PINs and the coil lead wires are connected by way of soldering. A wire cutting step used for cutting away unnecessary coil lead wires is arranged at the edge of the shell. According to the network filter, the connection mode that the ends of the coil lead wires are pressed tightly and fixed through the PINs and the inner walls of the wire clamping grooves is adopted, the conventional wire winding connection mode is substituted, the process becomes simple, manpower and processing cost are saved, problems that originally, tweezers are used, so that surface paint on coil lead wires is prone to being damaged, and the coil lead wires are prone to being broken due to clamping are avoided, the electrical performance is improved, and the product qualified rate is raised.

The invention relates to a welding joint and a use method thereof. The welding joint comprises a rack; the rack is internally provided with a machining cavity, an electric pole cavity communicating with the machining cavity is formed in the upper part of the machining cavity, a belt cavity communicating with the electric pole cavity is formed in the upper end wall of the electric pole cavity, therack is internally provided with a transmission cavity located on the left side of the electric pole cavity, a sliding cavity communicating with the transmission cavity is formed in the left side of the transmission cavity, a first gear cavity is formed in the left side of the sliding cavity, the rack is internally provided with a clamping claw cavity in the right side of the machining cavity, a third gear cavity is formed in the upper end face of the clamping claw cavity, a second gear cavity is formed in the right side of the third gear cavity, a rotating handle is rotatably arranged on thelower end wall of the machining cavity, a grip handle is fixedly arranged on the lower part of the rotating handle, a magnet is fixedly arranged at the top end of the rotating handle, the machining cavity is internally provided with a clamping block, and a fixing frame is rotatably arranged on the left end wall of the machining cavity.

The invention discloses a method for preparing a ceramic copper-clad plate by a hot-pressing active brazing method. The method comprises the following steps that 1, a ceramic chip is ultrasonically cleaned with pure water under the condition of 70 DEG C for 1-10min and then dried in a drying oven at the temperature of 100 DEG C; 2, the two faces of the dried ceramic chip are evenly coated with silver-copper welding flux containing active metal ingredients and dried in the drying oven at the temperature of 60-90 DEG C; 3, the two faces, coated with the welding flux, of the ceramic chip are in fit with copper sheets to form a set A; 4, multiple sets A are stacked, and every two adjacent sets A are isolated through an isolation sheet; 5, the structure of the multiple stacked sets A is placedinto a hot pressing furnace, and 0-30 MPa pressure is applied to the two ends of the structure; 6, heating along with the furnace is started when vacuum is pumped to 10<-3>Pa, heat preservation is carried out for 30-90min at the temperature of 400-500 DEG C, then, glue discharge is carried out, and heat preservation is carried out for 10-60min at the temperature of 800-950 DEG C for brazing. By adopting vacuum hot-pressing active brazing, the prepared ceramic copper-clad plate has the characteristics of extremely low void ratio, high drawing force, solder saving, high production efficiency, simple operation in the preparation process and the like.

The invention provides an LED light-emitting panel and a manufacturing method thereof. Blind holes are formed in advance, then the blind holes are processed into through holes, so that the damage of apad is prevented; a metal pillar with a solder layer and a dielectric layer is used as a conductive terminal, which can enhance its adhesion to a metal substrate and save solder; in addition, the metal pillar and the metal substrate are made of the same material, the temperature difference due to the difference in thermal conductivity is prevented, and warpage can be prevented.

A method for manufacturing a powder metallurgy support comprises the steps that iron, chrome, molybdenum, manganese, nickel, carbon and copper are mixed into mixed powder according to the mass percent; the mixed powder is compressed into a support green body with the density being 6.2-7.2 g/cm<3> by a press; the support green body is sintered under the temperature of 1000-1350 DEG C, the sintering time is 5-180 minutes, and annealing is conducted in a non-oxidizing atmosphere; extrusion is conducted by the press formed by modifying an extrusion moulding machine or a finishing press, and the extrusion deformation degree is larger than or equal to 2% in the diameter direction; selective processing is conducted according to dimension requirements, and steam treatment is conducted. The method for manufacturing the powder metallurgy support has the advantages that the manufacturing process is simple, the precision is high, the surface smoothness is good, and the problem that a mould is likely to fracture due to the fact that the forging process is conducted under high temperatures is effectively solved, so that the production cost is lowered and the production efficiency is improved. Compared with a traditional powder metallurgy process, the density of products is higher, and surface densification is basically achieved.

The invention relates to a welding process for an inner exhaust coil pipe assembly. The welding process comprises the following steps of S1, preparing, wherein grinding and rusting are carried out onthe positions of two annular inner exhaust coil pipe welding openings before welding; S2, selecting, wherein a 70N rolling welding stick is selected; S3, spot welding, S4, adding of an inner filling material, wherein after cooling is carried out, circular inner tubes are plugged into the inner walls of the two annular inner exhaust coil pipe welding openings, and the diameter of the inner tubes issmaller than the diameter of inner exhaust coil pipes by 1 mm; S5, welding, wherein the two ends of each of the two inner exhaust coil pipes are clamped through external clamps, then rotation is carried out at the speed being 1 r/min, and electric welding is used for welding the welding openings; S6, cooling, wherein normal temperature nitrogen at 20 DEG C-30 DEG C is continuously introduced, cooling is carried out, and the inner filling material is taken out; S7, grinding, wherein a grinding machine is used for grinding the positions of the welding openings to make the welding positions smooth; and S8, anti-corrosion treatment, wherein the welding positions are plated with a metal chromium layer. The method is easy to operate, high in process adaptability and capable of conveniently welding the exhaust coil pipes.

The invention relates to a no-cleaning liquid aluminum flux and a preparation method thereof, comprising the following steps: 1) weighing 60-85% of hydroxylamine fluoride, 5-30% of a metal active salt, 1- 5%, 0.1-5% of the corrosion inhibitor, mix evenly to obtain the active substance, and set aside; 2) According to weight percentage, weigh 15-30% of the above active substance and 70-85% of the solvent, set aside; 3) Mix the above-mentioned weighed solvent and active substance, and keep stirring during the mixing process, then raise the temperature to 50-60°C, stir for 8-12 minutes, put them in a closed plastic container for storage, and obtain the no-cleaning liquid aluminum auxiliary flux. The no-cleaning liquid aluminum flux of the invention has good solderability and high welding efficiency; it has little spatter during welding and almost no spatter, saving solder; there is very little residue after welding, no need to clean solder joints, and it has a long service life.

The invention provides an LED lighting device and a manufacture method thereof. Blind holes are pre-formed and made into through holes, so that no damage is caused to a pad; ceramic posts with a solder layer are used as conductive terminals, so that fixation to a ceramic substrate can be enhanced, and solder can be saved. In addition, the ceramic posts and the ceramic substrate are of same material, and therefore, temperature differences due to different heat conductivity coefficients can be prevented, and warping can be prevented.

The invention discloses a combined inserted die used for production of a sector gear shaft. The combined inserted die comprises a lower die bottom plate, a lower die assembly, a middle die assembly, an upper die bottom plate and an upper die assembly; the interior of a lower die cavity is in a detachable fit with a lower die insert; the interior of a middle die cavity is in a detachable fit with amiddle die insert; and the interior of an upper die cavity is in a detachable fit with an upper die insert. By installing the detachable lower die insert, middle die insert and upper die insert, notonly can mold cavities be defined for processing and forging the sector gear shaft, but also any insert can be rapidly replaced at low cost after being damaged, so that not only is a large amount of solder saved, is the maintenance cost of the combined inserted die reduced, and are the labor strength and the workload of a maintenance worker greatly reduced, but also the maintenance efficiency canbe promoted, the maintenance time is shortened, and the lost labor behavior caused by die maintenance can be further reduced; and moreover, since the combined inserted die is convenient to maintain, alarge number of standby dies do not need to be prepared in a manufacturing shop.