Precise positioning process and positioning structure for multi-time stretch forming

By forming a flanged hole structure in the first stretching process of the metal sheet and using its geometric invariance as a positioning reference, the problems of positioning drift and material waste in multiple stretching processes are solved, achieving precise positioning and efficient material utilization.

CN120901146APending Publication Date: 2025-11-07SUZHOU DONGYUE NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202511207819.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-27
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

In the process of multiple stretching and forming of metal sheets, traditional positioning methods lead to misalignment of the profile and waste of materials, making it difficult to achieve accurate positioning and efficient utilization.

Method used

The flanged hole structure is formed simultaneously in the first stretching process, including the straight section with axial height. Its geometric invariance is used as the positioning reference. The straight section is used for precise positioning in subsequent processes to eliminate surface misalignment, and material waste is avoided through the design of the compensation belt.

Benefits of technology

It achieves ±0.05mm precision positioning in multiple stretch forming processes, eliminates surface misalignment, achieves zero breakage rate and 100% material utilization, and breaks through the forming limit of high-strength materials.

✦ Generated by Eureka AI based on patent content.

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Abstract

The fine positioning process comprises the following steps that in the first stretching procedure, a flanged hole structure is synchronously formed in a preset area of a workpiece, a flanged hole comprises a vertical lifting section with the axial height, the vertical lifting section of the flanged hole is synchronously formed through first stretching, the vertical lifting section of the flanged hole is synchronously formed through geometric invariance of the vertical lifting section of the flanged hole, and the vertical lifting section of the flanged hole is synchronously formed; the material flow does not influence the size of the vertical lifting section, and the problem of positioning drift in multiple times of stretching is solved; and in the subsequent stretching process, the vertical lifting section of the flanging hole is adopted as a positioning reference for precise positioning, and profile dislocation caused by traditional peripheral positioning is eliminated.
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