A spinning method of a variable-wall-thickness cambered part

By employing a composite spinning forming method, combining the principle of constant volume during plastic deformation with the final part geometry, and using strong spinning and final spinning processes, the problem of controlling the wall thickness of variable wall thickness curved generatrix parts was solved, achieving high-precision forming and weld-free design, and improving forming efficiency and part quality.

CN116689593BActive Publication Date: 2026-06-23沈阳中科金成制造科技有限公司
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Patent Information

Application Number
CN202310741677.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-21
Publication Date
2026-06-23
Estimated Expiration
2043-06-21

AI Technical Summary

Technical Problem

Existing forming processes are difficult to achieve precise control over the wall thickness of variable-wall-thickness curved busbar parts with constriction features on both sides, and traditional methods cannot achieve integral forming or have weld defects.

Method used

A composite spinning forming method is adopted, which involves two spinning processes: strong spinning and final spinning. Combining the principle of constant volume in plastic deformation and the final part geometry, the dimensions of the transition tube blank and the initial blank are calculated. Spinning is performed using both mandrel-with and mandrel-less spinning methods to achieve quantitative control of wall thickness and weld-free design.

Benefits of technology

It has achieved high-precision forming of variable wall thickness curved busbar parts, avoiding welding defects, shortening the process flow, and improving forming efficiency and serviceability of parts.

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Abstract

The present application relates to a kind of variable wall thickness curved generatrix parts spinning method, belong to pipe precision forming field.This method combines the principle of plastic deformation volume invariable and the geometric structure characteristics of final part, by the mandrel spinning of initial cylindrical blank, realize the pre-preparation of quantitative difference thick pipe blank;Then the trajectory of spinning wheel is quantitatively calculated, and spinning deformation is carried out according to the calculated trajectory parameters, finally realize the processing of variable wall thickness curved generatrix pipe with neck-in structure on both sides.Compared with the traditional reducing forming process, the method can realize the quantitative control of wall thickness;Compared with the ordinary spinning forming pipe with neck-in structure on one side by re-welding forming mode, effectively avoid welding defects, ensure the consistency and surface quality of part.With the accurate control system of spinning equipment and the accurate calculation of blank structure size, the dimensional accuracy and surface quality of part are effectively guaranteed, and the forming precision and efficiency are improved.
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Citation Information

Patent Citations

  • Pipe diameter reducing machine

    CN102327911A

  • Spinning-reducing forming method of stepped pipe blank for small and medium-sized bulging forming automobile axle housing

    CN112570488A