Double-transition-section cooperative movement precise forming optimization method based on free bending technology

Abstract

The invention provides a double-transition-section cooperative movement precise forming optimization method based on a free bending technology. The method is characterized in that the movement modes of two transition sections are combined; the method specifically comprises the steps that the eccentric distance U is determined according to a U-R relational expression, the running time of a transition section 1 is obtained, the transition section is optimized to be in uniform deceleration motion, and the initial speed and the accelerated speed of running of the transition section 1 are obtained; a uniform deceleration motion equation of the transition section 1 is determined according to the obtained data; on the basis of the determined U value, the running time of the transition section 2 is obtained, the transition section 2 is optimized to be in uniform acceleration motion, the running acceleration and the running end speed of the transition section 2 are obtained, and a uniform acceleration motion equation of the transition section 2 is determined according to obtained data. According to the method, the error with the design shape can be controlled within 2%, and any compensation or cyclic calculation measures are not needed; through combined movement of the transition section 1 and the transition section 2, the forming precision of a pipe is improved, and a new method is provided for precise forming of the free bending technology.

Description

technical field [0001] The invention belongs to the field of forming and manufacturing of metal components, in particular to a method for optimizing the precise forming of double transition sections coordinated motion based on free bending technology. Background technique [0002] Elbows have the advantages of high strength and high toughness, so they are widely used in aerospace, oil transportation, automobile manufacturing, architectural decoration, lightweight and other fields. The traditional pipe bending process includes push bending, stretch bending, press bending, etc., but the traditional pipe fitting processing technology seems to be stretched when forming pipe fittings with high degree of freedom and high precision requirements. The proposal of free bending technology meets the market's requirements for high-degree-of-freedom and high-precision pipe fittings, and provides an effective way for the development of market pipe fittings. According to the characteristic...

AI Technical Summary

Problems solved by technology

However, this method takes a long time and consumes a lot of cost, which does not meet the requirements of sustainable development

Another springback processing method is theoretical analysis, so as to compensate the springback amount in advance in the molding process, but this analysis method has many assumptions, and the effect is not ideal

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