A machining device for integrated forming of aerospace housings

By designing flexible pads and ball bearing structures, combined with a hydraulic system, the problem of localized plastic deformation and micro-wrinkles in sheet metal caused by the sharp corners of punches in flexible multi-point forming equipment was solved, achieving high-quality integrated forming of aerospace vehicle shells.

CN120920578BActive Publication Date: 2026-06-09JIANGSU HANGHAO AVIATION TECH CO LTD
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Patent Information

Application Number
CN202511150298.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-18
Publication Date
2026-06-09
Estimated Expiration
2045-08-18

AI Technical Summary

Technical Problem

In the process of forming aerospace shells, flexible multi-point forming equipment suffers from problems such as the sharp corners of the punches causing localized plastic deformation of the sheet metal and the formation of micro-wrinkles between adjacent punches.

Method used

By employing a flexible pad and ball bearing structure, combined with a hydraulic system and a control system, the elastic deformation of the flexible pad and the rolling connection of the balls prevent direct contact between the punch tip and the sheet metal. Furthermore, the pressure plate applies localized pressure to the sheet metal, eliminating gaps between adjacent punches and improving forming quality.

Benefits of technology

This effectively avoids localized plastic deformation and micro-wrinkles in the sheet metal, improves the molding quality and stability of aerospace shells, and ensures smooth surface and dimensional accuracy.

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Abstract

This invention relates to the field of aerospace manufacturing technology, specifically to a processing equipment for integrated molding of aerospace shells. The equipment includes a base and a mounting base, with the mounting base fixedly mounted on the base. Multiple piston holes are formed on the upper surface of the mounting base, and a punch is coaxially mounted in each piston hole. The upper end of the punch extends beyond the piston hole. A flexible pad is provided on the upper side of the mounting base, with its lower end face fitting against the upper end face of the punch. The flexible pad has through holes matching the number of punches. A spherical groove is coaxially formed on the upper surface of the punch, and a ball bearing is rolled within the spherical groove. This invention, by using a flexible pad, avoids direct contact between the punch's sharp corner and the sheet metal, preventing localized plastic deformation of the sheet metal. Simultaneously, the flexible pad provides elastic support to the sheet metal, preventing gaps between adjacent punches from easily forming micro-wrinkles in the sheet metal, thus improving the molding quality of the aerospace shell.
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Citation Information

Patent Citations

  • Rolling tool head for incremental forming

    CN101758135A

  • Flexible mold used for profile stretch bending

    CN103878238A