Method for forming aluminum alloy end wall column member for new-generation high-speed motor train unit

Abstract

The invention relates to a method for forming an aluminum alloy end wall column member for a new-generation high speed motor train unit, belonging to the technical field of bending and forming. In the invention, a die profiling method is adopted and mainly comprises the following steps of: a, filling a cavity; b, positioning a section bar; c, profiling; and d, post-treating. The method specifically comprises the following steps: firstly, filling a continuous chaplet in the lower cavity of the section bar; then starting a hydraulic machine, raising a line segment of a lower die under the action of an ejector rod, horizontally placing the section bar on the line segment of the lower and dropping an upper die slowly so that the section bar is sandwiched between the upper die and the lower die; and then profiling: bending and deforming the section bar so that the section bar gradually fits on the section surface of the lower die, stopping the hydraulic machine, and maintaining a compaction state for a while so that the shape is stable; and finally, taking the section bar out, cutting off allowances at the two ends of the section bar, machining other geometrical characteristics, correcting parts, and clearing the surface so as to obtain the complete end wall column member. By the method, the problems existing in the forming process of the end wall column member of the motor train unit body, such as large section distortion, longitudinal profile size errors and the like, are solved, and the forming precision is improved.

Description

Technical field: [0001] The invention relates to a forming method of an aluminum alloy end wall column member of a new generation of high-speed train, belonging to the technical field of bending forming. Background technique: [0002] Nowadays, my country's rail transit has entered a high-speed era. The new generation of high-speed rail vehicles, represented by high-speed EMUs with a speed of 380 kilometers per hour, is the core equipment for realizing high-speed rail transit, and is the leading model that my country focuses on development. The demand is strong and the market is huge. The new generation of high-speed EMUs integrates multiple disciplines such as mechanical manufacturing, power electronics, network control, and aerodynamics. The technology is complex and the quality standards are high. Currently, only a few countries have mastered its manufacturing technology. One of the key technologies for the independent development of a new generation of high-speed EMUs i...

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Problems solved by technology

[0006] The invention relates to a new generation method for forming aluminum alloy end wall column members of high-speed trains, and aims to solve the problem that the domestic self-developed end wall column members have serious defects and cannot meet production needs

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