Design method of rectangular section ring blank for roll forming outer shoulder structure ring

By optimizing the rolling and expanding forming process using a rectangular cross-section ring blank design method, the filling problem of the ring part with an external boss structure was solved, achieving efficient and precise forming results and reducing production costs.

CN122174313APending Publication Date: 2026-06-09TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Filing Date
2026-02-10
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies often encounter difficulties in filling the boss structure when rolling and expanding ring parts with external bosses, leading to defects such as local cracks and folds. In addition, the process is lengthy and energy consumption is high.

Method used

By adopting a rectangular cross-section ring blank design method, and by setting the characteristic parameters of the boss height and the thickness filling coefficient, the rolling forming process is optimized to achieve the one-piece forming of the outer boss structure ring, thus eliminating the need for die forging process.

Benefits of technology

It improves the formability of the boss structure, shortens the manufacturing cycle, reduces production costs, and enables short-process, efficient and precise forming of external boss structure ring parts.

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Abstract

This invention relates to a method for designing a rectangular cross-section ring blank for roll forming an external boss structure ring, belonging to the field of irregular ring roll forming technology. It solves the technical problem of insufficient formability, such as filling defects, in the roll forming process of external boss structure rings, and includes the following steps: S1, taking h... r =h, characteristic parameter h of the boss height c =h0 / h r S1. The boss thickness filling coefficient is K0; S2. The rolling feed rate ΔR is determined according to the boss thickness filling coefficient K0; S3. The rolling feed rate ΔR determines the thickness t of the ring blank; S4. The inner diameter d and outer diameter D of the ring blank are determined according to the thickness t of the ring blank obtained in step S3, thus completing the design of the rectangular cross-section ring blank. This invention can accurately determine the inner and outer diameter dimensions of the rectangular cross-section ring blank, reduce the number of trial and error, achieve good filling effect of the boss part, shorten the process flow, reduce energy consumption and production costs, and realize short-process accurate forming of ring parts with external boss structure.
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