3results about How to "Improve brazing quality" patented technology

A contact welding part and a pressure-bearing sealing high-temperature-resistant connector belong to the field of electric connectors, a first small-diameter end of a shell transition ring is in brazed connection with the outer wall of the front end of a first boss on the rear side of a ceramic insulator, and the inner wall of the first small-diameter end is provided with a first step which is in axial stop fit with the front end face of the first boss; the second large-diameter end of the contact piece transition ring is in brazed connection with the outer wall of the rear end of the first boss, the second small-diameter end of the contact piece transition ring is in laser welding with the tail of the contact piece, and the rear end face of the first boss is in axial stop fit with the reducing part of the second large-diameter end; the plurality of contact welding parts are arranged in the shell in a penetrating manner; and the first large-diameter end of the shell transition ring is in laser welding with the shell. The contact welding part is beneficial to standardized and batch production; the contact piece transition ring is adopted as a bridge connecting piece and is suitable for welding of large-specification contact pieces; an axial pressure-bearing structure is formed by stop matching, so that reliable sealing in a high-pressure working environment is realized; and the contact piece and the shell meet electroplating requirements.

This invention relates to an assembly device for the bottom component of a liquid rocket engine gas generator, belonging to the field of mechanical manufacturing and processing. The device features symmetrically arranged lifting shafts on the side walls of a base. Graphite rings are placed around the circumference of the upper surface of the base plate. The lower half of the external gas generator rests on the graphite rings. The base plate has uniformly distributed through holes. A support rod is inserted above each through hole. A graphite pad is installed on the top of each support rod. Pins extend sequentially from top to bottom into the through holes of the graphite pads and support rods. An external gas generator nozzle is installed on the top of each graphite pad. The upper half of the external gas generator is mounted on top of the lower half. An inclined through hole is provided on the inner wall of the upper half of the external gas generator. An inspection pin is installed in the inclined through hole. This invention is specifically designed for the assembly and brazing process of the bottom component of a gas generator, solving the problems of positioning and brazing quality in the assembly of a large number of nozzles, and effectively improving assembly efficiency.

The present application relates to the technical field of brazing, in particular to a sintering type preformed filler metal, a preparation method and application thereof. The sintering type preformed filler metal comprises a magnesium film, aluminum powder, copper oxide powder and nickel powder attached to the same side of the magnesium film, and an aluminum flux attached to the other side of the magnesium film. The present application takes advantage of the low ignition point of magnesium, which is as low as 490 DEG C, to ignite the magnesium film at a lower temperature during brazing, and the heat generated causes the aluminum powder and copper oxide powder to produce an aluminothermic reaction. The high temperature released by the aluminothermic reaction further causes part of the aluminum powder and the nickel powder and the copper generated by the aluminothermic reaction to form intermetallic compounds or solid solutions, thereby achieving the purpose of brazing connection. Therefore, the present application only needs to apply a temperature of about 500 DEG C to the weld to achieve the purpose of brazing aluminum alloy connecting pieces. The present application solves the problem that the other heat-resistant parts are easily damaged by overheating when using aluminum-based filler metal to braze aluminum alloy connecting pieces, and further reduces the brazing temperature under the premise of ensuring the brazing strength.