Flange thickness adjustable stamping mechanism for stretching product with flange

By employing a four-step process and a mold combination structure, the problem of flange thickness adjustment during the stamping process was solved, achieving adjustable flange thickness and a smooth, burr-free inner wall, thus improving product quality.

CN224294464UActive Publication Date: 2026-05-29SUZHOU SANWEI PRECISION METAL PROD CO LTD
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Patent Information

Application Number
CN202520790570.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-24
Publication Date
2026-05-29
Estimated Expiration
2035-04-24

AI Technical Summary

Technical Problem

Existing technologies make it difficult to adjust the thickness of the drawn flange while maintaining a smooth, burr-free inner wall during the stamping process, especially when customers require a smooth inner wall, making it impossible to effectively design the stamping method.

Method used

The process employs four steps: semi-stretching, stretching and oblique stretching, back-up and flattening. Through multiple stamping stations between the upper and lower die bases, and utilizing the combination structure of the third punch and the third die, the flange thickness can be adjusted. Combined with the use of nitrogen springs and limit blocks, the metal flow is ensured to the designated position.

Benefits of technology

This technology enables adjustable flange thickness to meet production requirements while ensuring a smooth, burr-free inner wall, thus improving product quality.

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Abstract

The utility model discloses a flange thickness adjustable stamping mechanism for stretching a product with a flange, which comprises an upper die holder and a lower die holder, and four stamping stations, namely a semi-stretching station, a stretching and oblique stretching station, a pier returning station and a leveling station, are sequentially arranged between the upper die holder and the lower die holder. The novel flange has the advantages that the flange can be increased to the required thickness through the cable-stayed and pier returning technology, and therefore the production requirement is met.
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