Segmented series-connection type telescopic inner supporting tool and method

Abstract

The invention discloses a segmented series-connection type telescopic inner supporting tool and method, and belongs to the field of local shape correction of a solid engine shell and control over welding deformation of external parts. The inner supporting tool comprises inner supporting assemblies, mandrels and an ejector rod; each inner supporting assembly comprises an inner supporting cylinder,an inner end plate and an inner supporting jacking tool; the multiple inner supporting assemblies are connected end to end and are coaxially arranged, and one mandrel is coaxially arranged between every two adjacent inner supporting assemblies; each mandrel is of a cylindrical structure, one end of each mandrel is coaxially provided with a conical circular truncated cone structure, and a blind hole is formed in the center axis of the top of each conical circular truncated cone; the ejector rod is a cylinder with a circular groove formed in one end along the central axis; and the inner diameterof the circular groove is larger than the outer diameter of cylinders of the mandrels. According to the segmented series-connection type telescopic inner supporting tool and method, shell welding deformation control and shape correction treatment in the welding process of the external parts of the solid engine shell can be achieved. Tests prove that after the sectional series-connection type telescopic inner supporting tool is used for welding the external parts of the shell, welding deformation is effectively controlled, the shape correction effect on the shell is achieved, and the roundnessof the shell is reduced to 1.0 mm from 10 mm.

Description

technical field [0001] The invention belongs to the field of local shape correction of solid motor casings and control of welding deformation of external parts, and in particular relates to a segmented series-type telescopic inner support tooling and a method. Background technique [0002] The solid engine casing is mainly assembled and welded by front and rear joints, cylinders and external parts. The wall thickness of the casing is relatively thin. It is easy to cause deformation of the cylinder and affect the roundness of the product. The conventional solution is to use tooling to rigidly support the cylinder inside the cylinder to reduce deformation. However, since the inner diameters of the front and rear joints of the solid motor casing are much smaller than the inner diameter of the cylinder, there is a problem that the inner support tooling cannot be put into the casing. Internal, or poorly braced problems. [0003] Patent CN108608352A "A Kind of Internal Support C...

AI Technical Summary

Problems solved by technology

[0008] In order to avoid the deficiencies of the prior art, the present invention proposes a segmented and series-type scalable inner support tool, which adopts a structure that is radially split and axially detachable, and solves the difficulty of ordinary inner support tooling. Entering the solid rocket motor casing, and because the area that needs to be supported is large, the design of the internal support tooling has the problem that rigidity and weight cannot be taken into account, and it is difficult to install and disassemble

Images