Method for applying a T-shaped composite skirt on a composite case of a solid rocket motor

By drilling holes in the T-shaped composite skirt and connecting the upper skirt tooling with the winding mandrel, the problem of difficult positioning of the upper skirt of the T-shaped composite skirt was solved, achieving precise positioning and simplifying the molding process, thus meeting the design hole requirements of the composite material cylinder.

CN117644676BActive Publication Date: 2026-06-19HUBEI SANJIANG HANGTIAN JIANGBEI MASCH ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI SANJIANG HANGTIAN JIANGBEI MASCH ENG CO LTD
Filing Date
2023-11-17
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In the existing technology, the method for attaching the T-shaped composite skirt is not mature, which makes precise positioning difficult and affects the thrust line deviation of the composite material cylinder and the assembly of parts.

Method used

Two sets of symmetrical process holes are drilled on the T-shaped composite skirt, and it is cut into two halves along the cutting line. The upper skirt tooling is connected to the winding mandrel to wind the circumferential layer of the cylinder, fix the T-shaped composite skirt on the cylinder, and ensure precise positioning by tightening nuts and pressure plates. Finally, the hole positions are machined after the shell is formed.

Benefits of technology

It achieves precise positioning of the T-shaped composite skirt, avoids hole misalignment, simplifies the molding process, and meets the design hole requirements.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117644676B_ABST
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Abstract

This invention proposes a method for attaching a T-shaped composite skirt to a solid rocket motor composite material cylinder, comprising: S1, forming a T-shaped composite skirt by drilling two sets of symmetrical process holes on the T-shaped composite skirt, the process holes being located on the symmetry line of two adjacent bosses, and cutting the T-shaped composite skirt in half along a cutting line that is the symmetry line of the two sets of process holes; S2, installing the upper skirt fixture onto a winding mandrel, and connecting the T-shaped composite skirt to the upper skirt fixture through the process holes, so that the T-shaped composite skirt is installed in the designated position; S3, winding the circumferential layer of the cylinder to fix the T-shaped composite skirt onto the cylinder; S4, curing the cylinder. This method allows for precise positioning of the T-shaped composite skirt after attachment. After the shell is formed, the hole positions of the T-shaped composite skirt are machined according to the front / rear joint hole positions, completely avoiding quadrant misalignment caused by inaccurate positioning of the T-shaped composite skirt. The forming method is simple and can meet the design hole position requirements of the composite material cylinder.
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