34results about How to "Increase the brazing area" patented technology

A stacking-type, multi-flow, heat exchanger includes a plurality of heat transfer tubes and fins stacked alternately, a tank formed at an end of the heat transfer tubes, and an end plate provided at an end of the tank. The heat exchanger has a projecting portion provided to a surface of an outermost tube plate, a raised portion with an opening formed through the projecting portion, and an engaging portion and a closing portion provided integrally to the end plate for engaging the raised portion and for closing an opening of the raised portion. A positional shift of the end plate at the time of temporary assembling may be prevented, and the brazing properties and the pressure resistance of the tank end portion may be increased.

The invention discloses a processing method of anti-disengagement high-wear-resistance cutting teeth. The processing method mainly comprises the following steps of preparing a soldering flux, wherein the soldering flux comprises the following raw materials in percentage by mass: 8 percent of borax, 20 percent of boric acid and the balance of pure copper powder; coating the soldering flux on the outer surface of a processed cylindrical soldering lug, and then putting the cylindrical soldering lug into a groove of a cutter bit; coating the soldering flux at the bottom and on the outer circle surface of a hard alloy cutter bit, and then putting the hard alloy cutter bit into the cylindrical soldering lug; preheating the cylindrical soldering lug in an incubator with the temperature of 200 DEG C, heating the cylindrical soldering lug in an oven with the temperature of 930 DEG C, and then slowly cooling the cylindrical soldering lug to room temperature; removing the welding flux and oxide skin remaining on the surfaces of the cutting teeth, feeding metal base ceramic alloy powder to the positions, except the hard alloy cutter bit and a cutter handle, on the cutter bit; performing laser scanning; finally performing stress relief annealing on the laser-clad cutting teeth, maintaining the temperature of 200-400 DEG C for 2-4 hours, and then slowly cooling to the room temperature along with a furnace. According to the method, the hard alloy cutter bit is firmer, and the synchronous failure of the cutter handle and the hard alloy cutter bit can be realized. Compared with single laser-clad strengthened cutting teeth, the anti-disengagement high-wear-resistance cutting teeth have the advantage that the service lives can be prolonged by over 3 times.

A sealing assembly, a method of preparing the sealing assembly and a battery are provided. The sealing assembly comprises a metal ring having a mounting hole therein; a ceramic ring having a connecting hole therein and disposed in the mounting hole; and a core column disposed in the connecting hole, wherein at least one of an inner circumferential wall surface of the metal ring, an outer circumferential wall surface of the ceramic ring, an inner circumferential wall surface of the ceramic ring and an outer circumferential wall surface of the core column is configured as an inclined surface, and an inclination angle of the inclined surface relative to a vertical plane is about 1 degree to about 45 degrees.

The invention relates to the field of aerospace device processing, and discloses a method for processing an injector partition cavity, which includes the following steps: A1. Cutting out fan-shaped grooves and wedge-shaped vertical grooves on the inner circumference of the annular body; processing the upper and lower cover plates and Wedge-shaped insert, assemble the upper and lower cover plates at the fan-shaped groove, finish the wedge-shaped insert and assemble it at the vertical groove, and vacuum braze to obtain the bulkhead cavity assembly: A2. Assemble the ring groove in the bulkhead cavity Fix and braze the inner circumference of the main body component; wire cut, assemble and braze the hollow plate and corrugated plate to obtain the partition; wire cut the adapter, assemble it with the partition and braze to obtain the honeycomb component: A3. End milling on inserts and ring groove parts to process sinking table, fine milling compensation block; milling square groove in the middle of the reinforcement plate, and milling solder grooves on both sides of the square groove and the outer end face of the reinforcement plate; assemble, fix and braze Weld the diaphragm chamber body assembly, reinforcement plate, honeycomb assembly and compensation block; finish machining after being released from the furnace, and argon arc weld the water joint at the water inlet to obtain the injector diaphragm chamber.

The invention relates to the technical field of workpiece processing and maintenance, and discloses a vacuum brazing method for workpiece joints based on strength compensation, which includes the following steps: a. Assembling two workpieces to be processed or repaired so that their contact surfaces are flush; b. Determine the compensation block material according to the material of the two workpieces; c. Calculate the thickness B and length C of the compensation block according to the size of the two workpieces, and process the compensation block; d. Set up and compensate the joints of the two workpieces respectively Groove matching the size of the block; e. Apply solder to the bottom of the groove, then place the compensation block, position the compensation block with burrs, and then inject solder into the gap between the groove and the compensation block; f. Put the assembled compensation block The workpiece is vacuum brazed in a vacuum brazing furnace; e. Finishing the brazed workpiece to ensure that it reaches the standard size. The invention increases the brazing area by arranging a compensation block between the joints of two workpieces that need to be brazed, ensures the strength of the workpieces after processing and maintenance, and increases the service life of the workpieces.

The invention discloses a method for preparing a wind tunnel heater with a special-shaped air pipe, which includes the following operations: processing fluid nozzles, special-shaped air pipes, air pipes and a shell; sequentially assembling the liquid nozzle, special-shaped air pipes, and air pipes at the assembly position of the shell; Processing the first partition, opening a collecting tank for diverting the solder on the first partition; passing the first partition through the liquid nozzle, special-shaped air pipe, and air pipe and assembling it on the housing to obtain an assembly assembly; Place the assembled components in a vacuum brazing furnace and perform vacuum brazing to obtain a brazed component; process the second partition, assemble the second partition on the first partition and the shell, and then place the special-shaped air pipe reinforcement ring The trachea reinforcement ring and the liquid nozzle reinforcement ring are assembled on the second partition; after the assembly is completed, the cover plate groove is processed, and the cover plate is assembled into the cover plate groove to obtain a heater assembly; the heater assembly is vacuum brazed. The invention reduces welding difficulty and ensures product quality by adjusting the brazing structure.

The invention discloses a method for integrally welding complex rectangular nozzles, which comprises the following steps: according to the design requirements of the complex rectangular nozzles to be processed, vacuum brazing is carried out after manufacturing the complex rectangular nozzles according to four-part assemblies; the four-part assemblies include Symmetrical left and right components, as well as symmetrical upper and lower components; the first stainless steel substrate is covered with foil-shaped solder, and the side of the first copper plate provided with cooling channels faces the foil-shaped solder, The left and right components are vacuum-brazed after being pressed by tooling; the curved surface of the second stainless steel substrate is used as the joint surface, and foil-shaped solder is spread on it, and then the second copper plate is pasted with the curved surface facing the foil Shaped brazing material, vacuum brazed upper and lower components after pressing with tooling; assemble each component into a rectangular structure, lay paste solder at the connection seam, and vacuum braze the overall assembly of the rectangular nozzle after pressing. The present invention adopts partial processing and brazing and then overall brazing, which reduces the difficulty of processing.