Composite material fixing shell for spray pipe and based on 3D printing

Abstract

The invention relates to a composite material fixing shell for a spray pipe and based on 3D printing. The composite material fixing shell is divided into a flange section, a convex seam allowance section, a conical section and a step section, the flange section is of a cylinder equal-wall-thickness structure, and a plurality of round holes are evenly distributed in the end face in the circumferential direction; the seam allowance section is of a short cylinder equal-wall-thickness structure and is perpendicular to the flange section; the conical section is of a conical equal-wall-thickness structure and is in smooth transition connection with the convex seam allowance section and the flange section; the step section is a rotary body, the inner surface of the step section is an end surface,and the outer surface of the step section is a short end surface plus a conical surface; one end of the step section is of a one-step structure, and the other end of the step section is in smooth transition connection with the conical section; and the flange section, the convex seam allowance section, the conical section and the step section are all made of continuous fiber reinforced composite materials and are integrally formed through an additive manufacturing process, and all the structures are in smooth transition connection. The 3D printing composite material fixing shell is formed, thestructural mass of the spray pipe is reduced, the mass ratio of an engine is increased, and the 3D printing composite material fixing shell has important significance in supporting future upgrading and generation crossing of missile weapons.

Description

technical field [0001] The invention relates to a 3D printing (also known as "additive manufacturing") composite material bearing structure, in particular to a fixed shell structure for a solid rocket motor nozzle. Background technique [0002] Additive manufacturing technology has been partially applied in batches in the fields of biomedicine, transportation, aerospace, industrial equipment and electronic products. Due to its excellent performance, continuous fiber reinforced composite materials have been widely used in parts such as shells, compartments and hoods of missile weapons. The quality of the nozzle structure directly affects the range and carrying capacity of the missile weapon. The fixed shell is the core load-bearing component of the nozzle, and the load environment is harsh. At present, the materials are basically alloy steel or titanium alloy, and its mass accounts for The ratio is about 20%. Contents of the invention [0003] The technical problem to be ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a 3D printing-based composite material fixed housing for the nozzle to solve the problems of reducing the structural quality of the nozzle, shortening the manufacturing cycle, and improving the mass ratio of the solid rocket motor

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