Thin-wall high-rib component space envelope forming metal flow control and coordinated distribution method

Abstract

The invention relates to a thin-wall high-rib component space envelope forming metal flow control and coordinated distribution method. The method comprises the following steps that S1, a plate blank area is divided; s2, the number of multi-step structures of the thin-wall high-rib component at different moments is calculated; s3, establishing a plate blank element body horizontal direction stress balance differential equation; s4, a slab element body yield equation is established; s5, establishing a plate blank element body vertical stress calculation equation; s6, calculating the vertical stress distribution of each corner area; s7, calculating the vertical stress distribution of each section of horizontal flash; s8, calculating the vertical stress distribution of each section of vertical flash; s9, determining the position of an instantaneous shunting surface; s10, calculating a rib height instantaneous increment and a single-side flash length instantaneous increment; s11, the final rib height and the final single-side flash length are calculated; and S12, the final rib height and the final unilateral flash length are optimized. Forming defects can be eliminated, thin-wall high-rib component web high-rib coordinated forming is achieved, and the high-rib forming limit of thin-wall high-rib component space enveloping forming is improved.

Description

technical field [0001] The invention relates to the field of space enveloping forming, and more specifically relates to a method for controlling and coordinating metal flow in space enveloping forming of thin-walled and high-strength components. Background technique [0002] Thin-walled and high-reinforced components have high ribs, thin ribs, and thin webs. They have the advantages of light weight, good rigidity, and strong bearing capacity. They are widely used in aerospace, shipbuilding, and rail transportation. Space envelope forming is a high-performance, high-efficiency, low-cost manufacturing technology for thin-walled and high-reinforced components. The upper mold performs complex multi-degree-of-freedom movements around the fixed space envelope center, and the upper mold and the slab form a spatial envelope geometry and motion relationship. Under the continuous multi-pass multi-directional local rolling action of the upper and lower molds, the slab produces continuo...

AI Technical Summary

Problems solved by technology

However, the geometric structure of thin-walled and high-reinforced components is extreme, and the long-distance and multi-directional coordinated flow of metal is required in the space envelope forming process to achieve web thinning / rib heightening, while metal radial and circumferential flow thinning and axial flow The increased flow competes and restricts each other, resulting in a very complex metal flow pattern, which is prone to defects such as folding, cross-flow, and turbulent flow caused by uncoordinated metal flow

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