70results about How to "Reduce welding strength" patented technology

The present invention is a friction stir welding machine adapted to perform solid phase welding on a welding portion of materials to be welded, by pressing a welding tool against the welding portion of the materials to be welded while rotating the welding tool, and forcing the welding tool to be advanced into a softened portion which is softened by a frictional heat while stirring the softened portion, wherein a coating made of aluminum nitride is formed on at least a region of the welding tool to be in contact with the materials to be welded.

In a temperature sensor (1), a pair of electrode wires (25) of a thermistor element (21) are formed of a material prepared by adding strontium to platinum or a platinum alloy and without addition of zirconia or a like oxide. Rear end portions of the electrode wires (25) formed of the above-mentioned material and front end portions of sheath core wires (3) are laser-welded to one another in an overlapping condition.

Provided is an electric storage apparatus including: an electric storage device including an external terminal that has a first connection surface; a bus bar having a second connection surface that overlaps the first connection surface; a first weld portion that is formed extending over the external terminal and the bus bar in a region where the first connection surface and the second connection surface are opposed to each other; and a second weld portion that is formed extending over the external terminal and the bus bar in a region where the first connection surface and the second connection surface are opposed to each other, the second weld portion overlapping the first weld portion, wherein the second weld portion is formed such that its weld center is displaced from a weld center of the first weld portion. Also provided is a method for producing the electric storage apparatus.

The invention is a diffusion welding multilayer structure diaphragm capsule, belonging to the field of diaphragm capsule manufacturing. By adopting the methods of diffusion welding, machining and shaping, the manufacturing of diaphragm capsule in the invention can be realized. The main procedures include thin wall blank preparation, surface cleaning, surface modified treatment, welding-stopping treatment, diffusion welding, machining, shaping and the like. Compared with the multilayer structure diaphragm capsule manufactured by other methods, the multilayer structure diaphragm capsule manufactured by the invention has the advantages of fine fatigue property (above 1 million times), strong pressurization performance, adjustable rigidity, high compression ratio (higher than 80%), capability of micromation of inner holes, high precision of geometric dimensions, strong destabilization resistance, precise and controllable weldingline profile, adjustable width of weldingline and the like. By using the invention, the diaphragm capsule in the shape of circle, square and other shapes can be manufactured, and can serve as a compensation element of displacement and angle in hydraulic, barometric, transferring pipeline installation, an elastic compensation element and a pore damping element as well as a measuring element for a manometer and an altimeter; besides, the diaphragm capsule can be also used as a heat transferring finned tube for air conditioning, refrigeration and other devices as well as a metal capsule of separating gas or liquid for an accumulator and a storage box. The invention can provide multilayer structure diaphragm capsule products with fine performance for related industries.

The invention provides a solar cell slice and a fabrication method thereof. The solar cell slice comprises a silicon substrate slice, a positive-surface electrode on the front surface of the silicon substrate slice, a back electric field on the back surface of the silicon substrate and a back electrode electrically communicated with the back electric field, wherein the front surface of the silicon substrate slice comprises a non-antireflection film region, and the positive-surface electrode comprises a metal titanium layer arranged on the surface of the non-antireflection film region and a conductive metal layer arranged on the surface of the metal titanium layer. The positive-surface electrode is high in fine density, line broken is difficult to happen, the solar cell slice is difficult to strip and fall off, the resistance when the cells are connected in series is low, high fill factor is achieved, the photoelectric conversion efficiency of the cell is high, and the cost is low.

The invention relates to a perforated gas producing agent molding pressing product and a preparation process thereof. The appearance of the perforated gas producing agent molding pressing product is acylinder body; a penetrated or non-penetrated hole is formed at the inside; the perforated gas producing agent can achieve the goals of reducing the surface combustion process, or realizing the equalsurface combustion or increased surface combustion in a period time in the combustion process, and thus realizing the low early stage pressure and slope of the gas generator; the impact on an airbagand the harm are small; an airbag is slowly unfolded; the middle stage pressure fast rises; the airbag is fast filled; the later stage pressure is slowly reduced; the airbag maintaining time is prolonged; the curve is similar to the S-shaped pressure-time curve. The initial combustion surface is reduced; the reduced surface combustion or equal surface combustion or increased surface combustion arereduced; the pressure inside the gas generator is reduced, so that the material cost of the gas generator and the quality of the generator can be reduced. The pressing shaping process is used; the perforated gas producing agent is prepared in a pressing forming way, so that the preparation process is simple and efficient; the operation and the control are easy.

A crossmember and a manufacturing method for a crossmember is disclosed. The crossmember is made of a metal sheet having a given sectional shape, configures a part of a vehicle body frame, extends along a vehicle width direction, and has an engine mount attaching portion provided in a part of an upper plate portion. The crossmember has an upper crossmember that is made of a single metal sheet extending along the vehicle width direction, the upper crossmember having a larger thickness in a region including the engine mount attaching portion of the upper plate portion and a surrounding area of the engine mount attaching portion compared to a thickness of a remaining region.

The invention discloses a circular radiator box molding method and relates to the technical field of special automotive manufacturing. A molding die utilized in the circular radiator box molding method comprises an upper die and a lower die. The upper die comprises a cylindrical male die and a connecting plate fixed to the male die. The lower die comprises a female die with a circular cavity; the bottom of the female die is fixedly connected to a base plate, and padding bars are arranged under the base plate. The box molding steps include fixing the upper die to a bending punch of a bending machine through bolts, removing the bending punch of the bending machine, debugging and centering the lower die on a workbench and fixing the lower die to the workbench, placing a blank into the circular cavity of the female die, closing the upper die and the lower die of the molding die and then punching the blank, and finally opening the upper die and the lower die to obtain a circular box. Compared with the prior art, the circular box molding method has the advantages that manufacturing cost is lowered greatly since the original bending machine is utilized and an extra punch machine is omitted, and further, the circular box has good quality when punched and formed, and the molding speed, the level of automation and the production efficiency are high.

The invention relates to a four-corner welder and a welding method for welding plastic doors and windows. The four-corner welder comprises a machine base, wherein a left rack and a right rack are arranged on the machine base; the left rack is fixed at the left end of the machine base; the right rack is driven by a driving device to do back-forth and left-right sliding along the machine base; a left-lower machine head is arranged at one end of the left rack; a left-upper machine head is arranged at the other end of the left rack; a right-lower machine head is arranged at one end of the right rack; a right-upper machine head is arranged at the other end of the right rack; in addition, the left-upper machine head and the right-upper machine head are driven by the driving device to do back-forth sliding along the directions of the left-lower machine head and the right-lower machine head; conveying mechanisms for conveying profiles are arranged on the inner side of the left rack and the inner side of the right rack; a control cabinet is also arranged on one side of the machine base; an operation panel is arranged on the control cabinet, so as to realize the operation of the whole welder.

The invention discloses a machining technology of a non-fin heat exchanger. The non-fin heat exchanger comprises tube bodies and flat tubes. The machining technology of the non-fin heat exchanger comprises the following steps that (1) inserting holes are formed in the periphery of each tube body; (2) the two ends of each flat tube are inserted into the corresponding inserting holes formed in the tube bodies located at the two ends respectively; (3) a welding locating tool is arranged between every two flat tubes; each welding locating tool comprises a hollow tube, a clamping groove is formed in the tube wall of each hollow tube, and the flat tubes are clamped into the clamping grooves; (4) the portions, located on the connecting portions of the tube bodies and the flat tubes, of the tube bodies and the flat tubes are coated with soldering paste; (5) the two sides of each flat tube are respectively provided with a reinforcing welding rod attached to the circumferential walls of the corresponding tube bodies; (6) the portions, located at the connection portions of the tube bodies and the flat tubes, of the tube bodies and the flat tubes are coated with brazing flux and the mass concentration of the brazing flux is 30%-40%; (7) the tube bodies and the flat tubes are placed in a brazier together with the welding locating tools for brazing. By the adoption of the machining technology, good-quality welding of the non-fin heat exchanger is achieved.

A spark plug (1) includes a metallic shell (3) and a ground electrode (27) resistance-welded to the metallic shell (3). The ground electrode (27) is formed from a metal material in which precipitates PR containing at least one of an oxide, an intermetallic compound, etc., are precipitated in grain boundaries. The diameter of an equivalent circle of a precipitate PR having the greatest area is 50 μm or less, and the shortest distance between the precipitates PR is 2 μm or greater. The area occupied by the precipitates PR on the section of the heat-affected zone 27A is equal to 65% or more the area occupied by the precipitates PR (the diameter of an equivalent circle of a precipitate PR having the greatest area) on a section of the normal zone 27B.

The invention provides a method for welding a magnesium oxide target to a back plate, and relates to the field of sputtering targets. The method comprises the steps of performing cleaning and sand blasting treatment on a target welding face and a back plate welding face; and pouring molten brazing filler metal onto the target welding face and the back plate welding face obtained after sand blasting treatment, and further enabling the brazing filler metal to infiltrate the target welding face and the back plate welding face by using ultrasonic waves to realize welding. According to the method,the welding bonding strength of the brazing filler metal and the welding faces is improved by adding the sand blasting treatment process on the welding faces, the welding quality is enhanced, the method is easy and convenient to operate, and the welding rate can reach 99% or above.

The invention discloses a transmission shaft. The transmission shaft comprises a shaft tube, a spline sleeve and a universal joint fork, wherein the shaft tube is provided with a first end part and asecond end part; the spline sleeve is inserted into the interior of the first end part of the shaft tube, the inner wall of the first end part of the shaft tube is connected with the outer wall of thespline sleeve through magnetic pulse welding, and the axis of the spline sleeve is coaxial with the axis of the shaft tube; and the universal joint fork is inserted into the interior of the second end part of the shaft tube, the inner wall of the second end part of the shaft tube is connected with the outer wall of the universal joint fork through magnetic pulse welding, and the axis of the universal joint fork is coaxial with the axis of the shaft tube. According to the embodiment, the shaft tube is connected with the spline sleeve and the universal joint fork through magnetic pulse welding,the welding quality stability is good, the welding strength is not lost, namely, the weld joint strength is improved; and the shaft tube is made of an aluminum alloy material, so that the mass of thetransmission shaft is reduced; and the transmission shaft is low in cost and suitable for assembly lines and professional production lines for mass production.

The invention discloses a brazing copper alloy with high strength and corrosion resistance. The brazing copper alloy comprises the following ingredients in percentage by mass: 2.8-4.0% of Si, 0.5-1.5% of Mn, 0.2-1.0% of Mg, 0.1-0.8% of Ti, 0.01-0.1% of Ce and the rest amount of Cu. The brazing copper alloy disclosed by the invention has the advantages of high brazing strength, excellent corrosion resistance and good machining performance. As a small amount of Ti, Ce and Mg is added in the Cu-Si alloy, the brazing alloy provided by the invention has an obviously-fined grain size for casting line blanks, and the grain size is about one third of that of the S211 alloy; and the machining hardening ratio is obviously lowered, and the processing capability is enhanced.

A method for manufacturing a laminated iron core product includes laminating a plurality of iron core members which are punched from a first metal plate to form a laminate, removing oil adhering to the laminate, removing oil adhering to an end surface plate which is punched from a second metal plate, and disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate.

The invention discloses a brazing titanium-copper alloy with high strength and corrosion resistance. The brazing titanium-copper alloy comprises the following ingredients in percentage by mass: 2.8-3.5% of Si, 1.0-1.2% of Mn, 0.2-0.4% of Ti, 0.05-0.08% of Ce and the rest amount of Cu. The brazing titanium-copper alloy disclosed by the invention has the advantages of high brazing strength, excellent corrosion resistance and good machining performance. As a small amount of Ti and Ce is added in the Cu-Si alloy, the brazing alloy provided by the invention has an obviously-fined grain size for casting line blanks, and the grain size is about one third of that of the S211 alloy.