Three-dimensional multi-curvature part bending method

Abstract

The invention discloses a three-dimensional multi-curvature part bending method. According to the method, the structural form of a section bending die and a suitable section bending machine are determined by analyzing the shape, size, bending angle and forming force of a part to be bent; a digital model of the part to be bent is subjected to curvature analysis through a computer; bending springback theoretical analysis is adopted, and a die profile springback compensation design is performed by a numerical simulation method through computer aided design. The bending of a section requires matched bending chuck, bending die and machine tool. The die is processed by a numerical control technology. A measuring machine is used for detecting and correcting the die to be processed, and an error between theory and actuality is reduced, so that the part manufacturing accuracy is improved. Dies for three-dimensional complicated parts can be formed on a two-dimensional bending machine, the bending pass is reduced, and repair or scraping of the bending dies is reduced, so that the part manufacturing cost is effectively reduced; moreover, the production efficiency is high.

Description

technical field [0001] The invention relates to the field of metal bending forming, in particular to a stretch bending forming method for three-dimensional multi-curvature parts. Background technique [0002] As the main artery of the national economy, the country's important infrastructure and popular means of transportation, railways play an important role in China's economic and social development. However, the phenomenon of "difficult to find a ticket and hard to find a car" is still very prominent. Accelerating the construction of high-speed rail has become the main way to solve this bottleneck. The rapid development of high-speed rail technology is inseparable from the development of manufacturing technology. The three-dimensional and complex streamlined dynamic design of the high-speed rail head brings great difficulties to its manufacture. In the past, all parts relied on imports, and the manufacturing cycle was long. The high cost has virtually increased the manuf...

AI Technical Summary

Problems solved by technology

[0004] In actual production, the determination of the correction amount of the stretch bending die and the process parameters is mainly solved by practical experience or by trial and error, but this method cannot accurately form the profile in one stretch bending, and sometimes requires multiple pre-stretch bending and heat treatment. After the final forming, manual correction is required, and the cycle is long and the cost is high, which cannot meet the development needs of high-speed rail

Images