40results about How to "Smooth welding surface" patented technology

The invention discloses an electronic mounting lead-free soldering paste flux, with the components and weight contents: 45-65% of bonding-film forming agent, 0.2-15% of activator and surfactant, 1-10% of thixotropic sink-proof slipping agent, 0.5-10% of fitting additive, and the residual quantity of solvent. The preparation method of the flux is that the solvent and the bonding film-forming agent are arranged in a container which is provided with a dispersion device according to the dosage, are heated and continuously mixed till that the material is fully dissolved; after that, other materials are once added; the heating and mixing are continued till that all materials are dissolved into bright dilute viscous liquid, and then the heating and mixing are stopped; the mouth of the container is sealed, and the invention can be obtained after static arrangement. The SnAgCuBi and AnAgCu soldering paste which is made by the flux of the invention contains no halogens, requires no cleans, has good printing performance, does not stick plates, has no bypasses or topnotch and good forming of printing point, and has no edge collapse. By reflow soldering, the welding surface and the welding spot are bright and smooth without residue or solder beadings. All technical indexes of the flux and the soldering paste achieve the JIS-3197 standard.

The invention discloses an explosion cladding and welding method of titanium-steel compound plate welding seams. The titanium plate used for cladding is firstly pressed into an arc-shaped titanium plate 3. The base plates of two pre-butt-jointed titanium-steel compound plates are processed into smooth arcs corresponding to the arc-shaped titanium plate 3. A groove is formed on the compound plates. The smooth arcs of the base plates, the groove of the compound plates and the arc-shaped titanium plate are grinded by abrasive paper or buffing wheel to remove the oxides on the surface of the metals and expose metallic luster. Then, the titanium-steel compound plate is arranged on a sand foundation 7, and the arc-shaped titanium plate is arranged over the smooth arcs of the base plate supported by a supporter 4. The height of the supporter is adjustable, ensuring that an arc-shaped welding seam 5 is formed between the smooth arc and the arc-shaped titanium plate. The explosive 2 is arranged on the upper surface of the arc-shaped titanium plate. Explosive charge quantity is determined by the area of explosion cladding unit. The explosive is ignited by 8# industrial electric detonator, ensuring that the arc-shaped titanium plate and the base plate are clad into an integrated body, and a complete welding titanium-steel compound plate with full penetration is gained. The welding seam has a smooth surface, is good-looking and corrosion resistance, and has a long service life.

The invention discloses a miniature throttling refrigerator which is composed of an upper cover plate, a lower cover plate, a heat-exchange core body and a cold-end seal head. An upper rib sheet and a lower rib sheet are fixed on the two sides of a panel base of the heat-exchange core body; channels which are in disjunction distribution and vertical to the long side edges of the panel base are formed in the length direction of both the upper and lower rib sheets; the upper rib sheet is located in a lower groove of the upper cover plate; the lower rib sheet is located in an upper groove of the lower cover plate; a through hole and an air inlet are formed in the top part of one end of the upper cover plate while the other end is unsealed and provided with a throttling hole; a through hole and an air outlet are formed in the top part of one end of the lower cover plate while a throttling hole is formed in the other end thereof; the upper cover plate, the lower cover plate and the heat-exchange core body compose a throttling refrigeration body; the cold-end seal head is arranged on one end, at which the throttling hole is, of the throttling refrigeration body in a sleeved manner; a low-pressure passageway is formed between the upper cover plate and the upper rib sheet; a high-pressure passageway is formed between the lower cover plate and the lower rib sheet; a high-temperature and high-pressure fluid enters into the high-pressure passageway from the air inlet, is changed into a low-temperature and low-pressure fluid after passing through the throttling hole, then enters into the low-pressure passageway, and finally flows out of the air outlet. The miniature throttling refrigerator has big specific surface area and high heat exchange efficiency, can bear high-pressure operation and is easy for large-scale production.

The invention discloses an exiting device for laser hybrid welding. The exiting device for laser hybrid welding comprises a laser welding head, a semiconductor laser device and an optical fiber laser device, wherein the semiconductor laser device and the optical fiber laser device are respectively connected with the laser welding head; the semiconductor laser device transmits semiconductor laser; the optical fiber laser device transmits optical fiber laser; a light path of the laser welding head comprises a semiconductor light path, an optical fiber light path and a coaxial monitoring light path; a laser light beam of the semiconductor light path and a laser light beam of the optical fiber light path are superposed into a light beam for welding at a focus point of the laser welding head; a welding position is illuminated through an external light source; and light reflected by the welding position is displayed by a monitor after the welding position is imaged a coaxial monitoring light path. The technical problems that traditional welding pores are abundant, hot crack tendency is high, welding spatter is severe, welding joints are large and the like are solved. The exiting device for laser hybrid welding has the characteristics that energy utilization rate is increased, key holes are stable, the device is suitable for high-speed welding, solidification speed is reduced, the pores are also reduced, hot crack tendency is decreased, welding spatter is reduced, forming of welding joints is improved, so that a welding surface is smooth and the like.

The invention discloses a method for welding thin-wall micropipes of a fluoroplastic heat exchanger, which is characterized in that the fluoroplastic thin-wall micropipes are heated by metal bath as a heat carrier; a welding mold is placed in the metal bath; row tubes are placed in the welding mold to enable thermal expansion of a fluoroplastic end plate in the welding mold to be hindered in order to generate radial pressure; and the radial pressure is superposed with the pressure from the thermal expansion of an expansion core that is inserted in the fluorplastic heat exchanger, so that under molten state, the fluoroplastic end plate and the row tubes composed of the fluoroplastic thin-wall micropipes are molten together, and the welding purpose is achieved.

The invention discloses a high-density package substrate on-hole disk product and a preparation method of the high-density package substrate on-hole disk product. The preparation method comprises the following steps of drying a substrate, manufacturing locating holes, conducting laser drilling, conducting micro-etching, conducting copper plating, conducting pattern transfer, conducting electroplating for hole filling and conducting film stripping and etching, and then the high-density package substrate on-hole disk product is obtained. According to the method, under the effect of protective film layers of the thin copper substrate, the problem that copper foil at the bottom is cut through in the thin copper processing process in the past is solved, and a complete half-through hole structure is made on the thin copper substrate; meanwhile, the direct laser processing technology is adopted, the thickness of the copper foil can not be influenced, and through good matching between the direct laser processing technology and the MSAP process, a high-density Flip-chip product with the high-flatness on-hole disk structure can be manufactured.

The invention provides fluoroplastic condenser welding equipment, comprising an outer shell, an infrared heater disposed at the inner side of the outer shell, a fan disposed at the upper part of the outer shell, a fixing mold disposed at the lower end of the outer shell, a tube plate disposed below the outer shell through the fixing mold, a tube bundle connected to the tube plate through the fixing mold and a temperature sensor connected to the fixing mold. The tube bundle is provided with a modified PTFE inner core. Besides, the invention also provides a process for welding by using the equipment. The fluoroplastic condenser welding equipment prepared by the welding process provided by the invention is expected to achieve the following technical indexes: (1) a welding depth is larger than 8 mm; a welding surface is flat; and the fluoroplastic condenser welding equipment has no bubble; (2) pressure tests after shaping show that the fluoroplastic condenser welding equipment has no bubble after being kept for 30 minutes at a temperature of 25 DEG C and gas tightness of 0.45 MPa; and hydrostatic test show that the fluoroplastic condenser welding equipment has no leakage after being kept for 30 minutes at a pressure of 0.6 MPa.

The invention discloses an automatic production line for connector terminals. The invention belongs to the technical field of connectors, the automatic production line comprises a narrow-distance conveying belt, a spider man manipulator, a twisting and pulling mechanism, a welding mechanism, a detection mechanism, a turnover mechanism and a platform, the narrow-distance conveying belt is arrangedon the periphery of the platform. The spider man manipulator is arranged on the upper portion of the platform and can work on the narrow-distance conveying belt, the twisting and pulling mechanism, the welding mechanism, the detection mechanism, the turnover mechanism and the platform. The twisting and pulling mechanism, the welding mechanism and the overturning mechanism are sequentially arrangedat the fixed position of the upper edge of the lifting type rotary disc. All the structures are matched and connected in sequence, so that all procedures in the whole production can be integrated ina more matched mode, a complete assembly line is formed, the space is saved, operation is convenient, meanwhile, the production efficiency is greatly improved, and the labor cost is saved.

The invention discloses a manufacturing method of a thin-wall chilled special-shaped pipe. The manufacturing method comprises the following steps of: adjusting and changing parameters of raw materials entering a forming mold according to the hardness and the thickness of the raw materials; increasing the thickness of a formed closed hole type guide sheet; and controlling the size of an opening angle of a small guide and properly widening the width of the raw materials. With the adoption of the manner, the special-shaped pipe manufactured by the manufacturing method of the thin-wall chilled special-shaped pipe solves the problem that four corners of a welding line are easy to crack, so that the surface of the welding line of the special-shaped pipe is relatively flat and the yield is greatly improved.

The invention discloses a welding machine special for four-gun automatic argon arc welding. The welding machine special for four-gun automatic argon arc welding comprises an outer shell and a workbench arranged on the outer shell, wherein the workbench comprises a middle mold clamping mechanism arranged on the outer shell and welding gun mechanisms arranged at the two ends of the outer shell; each welding gun mechanism is composed of a first welding gun device, a second welding gun device, a third welding gun device and a fourth welding gun device; and the first welding gun devices, the second welding gun devices, the third welding gun devices and the fourth welding gun devices are symmetrical in pairs. Manual argon arc welding is replaced by a full-automatic welding technology, so that welding can be executed by manually starting a button; through full-automatic welding, production time can be greatly saved, production efficiency is improved, and welding quality is ensured; and the automatic argon arc welding machine has the advantages of being smooth in weld joint surface forming, free of undercut, weld beading, abrupt-change cross section and the like.

The invention discloses a double-layer panel welding method. The welding method comprises the following steps: 1) welded surfaces of first panels are grooved to form multiple first grooves; 2) first electric heating nets are paved on the welded surfaces of the first panels; 3) hot melting plates are paved on the first electric heating nets; 4) the first electric heating nets are heated, so that the sides, facing the first panels, of the hot melting plates are molten, and molten liquid flows into the first grooves; 5) welded surfaces of second panels are upwards arranged and grooved to form multiple second grooves; 6) second electric heating nets are paved on the welded surfaces of the second panels; 7) one sides of the hot melting plates of semi-finished welded parts in the step 4) cover the second electric heating nets; and 8) the second electric heating nets are heated, so that the sides, facing the second panels, of the hot melting plates are molten, and molten liquid flows into thesecond grooves. The double-layer panel welding method enables the welded surfaces to be smoother and the twisting resistance to be better.