Manufacturing method of round-to-square complex inner cavity structure

Abstract

The invention discloses a manufacturing method of a round-to-square complex inner cavity structure. The manufacturing method comprises the following operations that the outer circular surfaces, in the upper, lower, left and right directions, of a cylindrical inner sleeve are cut into inclined surfaces correspondingly, so that an inner sleeve is obtained; four compensation blocks matched with the inclined surfaces of the inner sleeve are machined; nickel-based adhesive tape brazing filler metal is evenly laid on the inner surface of each compensation block, and then the four compensation blocks are placed on the inclined surfaces of the inner sleeve; after the compensation blocks and the inner sleeve are clamped and fixed through a brazing tool, the compensation blocks and the inner sleeve are placed in a vacuum brazing furnace to be subjected to vacuum brazing, and an inner sleeve assembly is obtained; brazing filler metal grooves are formed in the rib of each runner groove and the outer surface of each compensation block; and the nickel-based paste brazing filler metal is applied in the brazing filler metal grooves, the outer sleeve is installed outside the inner sleeve assembly in a pressed mode, and the inner sleeve assembly and the outer sleeve are placed in the vacuum brazing furnace for vacuum brazing. According to the manufacturing method, the compensation blocks are designed for the structure of the inner sleeve, through two-time brazing, the machining difficulty is lowered, and the reliability of the manufacturing process is improved.

Description

technical field [0001] The invention belongs to the technical field of aerospace precision manufacturing, and relates to a method for manufacturing a complex inner cavity structure from a circle to a square. Background technique [0002] When processing the complex inner cavity structure from round to square, one end of the inner sleeve is round and the other end is square, and there are many runner grooves on the outer surface of the circular inner sleeve. Due to the special structure of the circular inner sleeve, the solder Difficult to preset. At the same time, the outer shell is also a complex structure of round to square, if the inner shell and the outer shell are processed separately, and then the two are brazed together, it is necessary to process a complex structure, especially the complex structure of the inner surface of the outer shell, which is very difficult to process. Difficult; and not only to ensure the quality of brazing, but also to meet the requirements ...

AI Technical Summary

Problems solved by technology

At the same time, the outer shell is also a complex structure of round to square, if the inner shell and the outer shell are processed separately, and then the two are brazed together, it is necessary to process a complex structure, especially the complex structure of the inner surface of the outer shell, which is very difficult to process. Difficult; and not only to ensure the quality of brazing, but also to meet the requirements of the pressure test, but also to ensure the bonding rate of the mating surface of the parts, to complete the reliable welding of the inner sleeve and the outer sleeve, which is a technical difficulty in the processing process

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