Rolling-spinning composite forming method for large thin-walled Y-shaped rings

Abstract

The invention relates to a rolling-spinning composite forming method of a large thin-wall Y-shaped ring piece. The method comprises the following steps that S1, an annular blank is placed in a rolling-spinning composite forming device, an annular top plate and a constraint mold are coaxially arranged, a annular baffle is arranged on a core roller, and the side surface of a rotary wheel is in closecontact with the upper end surface of an annular blank; S2, the constraint mold drives the annular blank, the rotary wheel and the core roller rotate around the self-axis, the core roller is fed in the radial direction of the annular blank, meanwhile, the rotary wheel performs feeding motion, under the combined action of the core roller, the rotary wheel and the constraint mold, the annular blankis subjected to continuous local plastic deformation, and the deformation is divided into three stages; and S3, when the forming is finished, the constraint mold stops rotating, the rotary wheel andthe core roller are separated from the ring part, and the annular top plate moves upwards to eject the formed target thin-wall Y-shaped ring part out of the constraint mold. According to the method, the large thin-wall Y-shaped ring piece is formed by rolling and multi-pass spinning, so that the remarkably effects of energy-saving and material-saving, reducing the production cost, improving the productivity and reducing the forming force are realized..

Description

technical field [0001] The invention relates to a precision rolling forming method for special-shaped rings, more specifically, to a rolling-spinning composite forming method for large thin-walled Y-shaped rings. Background technique [0002] Large thin-walled Y-shaped rings are typical core load-bearing components of aircraft and other equipment, which puts forward extremely high requirements for its manufacturing accuracy and working performance. At present, there are mainly two manufacturing methods for such thin-walled Y-shaped rings with complex shapes. [0003] One is the turning method, that is, the rectangular cross-section annular blank is turned, so as to process the target thin-walled Y-shaped ring. However, the turning method has problems such as low material utilization rate, large springback deformation of parts, and discontinuous metal streamlines, which greatly reduce the forming accuracy and mechanical properties of thin-walled Y-shaped ring parts. [0004...

AI Technical Summary

Problems solved by technology

Due to the large diameter and extreme shape of the parts, it is difficult to form such large thin-walled Y-shaped rings by traditional forging methods, and it is urgent to find an effective plastic forming method

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