A method for forming a variable wall thickness of a spinning part

By using a layered continuous pass design and real-time parameter adjustment, the problems of discontinuous wall thickness transition and difficulty in precision control in gradually thickened spun parts were solved, achieving smooth continuity and precise control of the gradually thickened wall, and improving the structural strength and service life of the parts.

CN122377955APending Publication Date: 2026-07-14江苏旋压机械设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏旋压机械设备有限公司
Filing Date
2026-05-26
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing spinning forming methods have problems such as discontinuous wall thickness transition, severe stress concentration, and difficulty in controlling wall thickness accuracy in gradually thickened spinning parts. This results in step-like abrupt changes and large fluctuations in wall thickness tolerance, which affect the structural strength and service life of the parts.

Method used

The design employs a layered, continuous pass design with a core mold guide groove. Combined with online thickness measurement and real-time parameter adjustment, it achieves real-time closed-loop control of wall thickness through an electromagnetic ultrasonic thickness measuring probe and a laser Doppler velocimeter. In addition, it monitors temperature with an infrared thermometer and dynamically adjusts the rotating wheel parameters to achieve smooth and precise control of wall thickness.

Benefits of technology

It achieves smooth continuity of gradually changing wall thickness, avoids step-like abrupt changes, optimizes stress distribution, improves wall thickness accuracy control and batch consistency, and enhances production efficiency and the mechanical properties of parts.

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Abstract

The application discloses the technical field of spinning forming and particularly relates to a gradual wall thickness forming method for a spinning part. First, according to the material quality requirement of the spinning part, a metal plate or a pipe material meeting the requirement is selected as a blank, and the initial size of the blank is calculated and determined according to the final gradual wall thickness parameters of the spinning part and in combination with the material thinning law of spinning forming. Then, the inner and outer surfaces of the blank are polished and treated to remove oil stains. Subsequently, lubricant is evenly applied to the inner surface of the blank and the surface of a subsequent spinning die to be used. Then, the blank after surface treatment is placed into an annealing furnace, and annealing parameters are set according to the material quality of the blank. Based on the above, the application has the effects of realizing smooth and continuous gradual change of wall thickness, avoiding step-like mutation, ensuring continuous metal flow lines and optimizing stress distribution through layered continuous pass design and core mold guide groove guidance.
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