Process for progressive forming of inner rib thin-walled cylinder by active power rotary roll forming

By employing a segmented, progressive forming process of active, high-intensity spinning and rolling of internally ribbed thin-walled cylindrical parts, combined with the principles of high-intensity spinning and rolling, the problems of low efficiency, weak strength, and heavy weight in the processing of large-diameter internally ribbed cylindrical parts have been solved, achieving efficient, high-performance, and lightweight forming results.

CN116213540BActive Publication Date: 2026-02-03XI AN JIAOTONG UNIV
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Patent Information

Application Number
CN202310021442.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-01-07
Publication Date
2026-02-03
Estimated Expiration
2043-01-07

AI Technical Summary

Technical Problem

Existing technologies for processing large-diameter cylindrical parts with internal ribs suffer from problems such as low production efficiency, weakened weld strength, increased weight, high mandrel costs, and internal rib tearing, making it difficult to meet the requirements of high efficiency, high performance, and lightweight.

Method used

The process employs an active, high-pressure spinning and rolling segmented progressive forming technology for thin-walled cylinders with internal ribs, combining the principles of high-pressure spinning and rolling with the inner and outer spinning wheels. Through the synergistic effect of the outer and inner spinning wheels, progressive forming without a mandrel is achieved, axial stress is controlled, the inner reinforcing ribs are prevented from breaking, and forming accuracy and material utilization are improved.

Benefits of technology

It has achieved efficient and high-performance forming of large-diameter internally reinforced thin-walled cylinders, reduced torsional instability and bulging wrinkles, improved forming quality and surface precision, and reduced production costs and weight.

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Abstract

The inner and outer ribs thin-walled cylinder inside and outside the wheel active strong power roll forming process, using the inner and outer roll wheel along the cylindrical blank circumference symmetry uniform distribution, the outer roll wheel roll after the current pass along the axial downward movement to complete the next pass processing of the cylindrical blank, until along the axial movement to the inner roll bottom end, the inner and outer roll wheel along the axial downward movement and repeat the above processing, until the completion of the processing of the cylindrical blank; In the roll forming process, the cylindrical blank is hardened, the performance is improved, and there is no drum-shaped fold caused by the axial stress in the axial feeding process and the inner side reinforcing rib is not broken; To different size of cylindrical blank and different size, shape of the inner side reinforcing rib, without preparing different core mold, only change the different inner roll, high flexibility of processing, low cost; The formed part has the advantages of high surface quality, good material performance, high near net shape material utilization.
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