Processing method of integral side wall and door frame of aluminum alloy car body for rail vehicles

Abstract

The invention discloses a machining method for an integral side wall door frame of an aluminum alloy vehicle body of a rail vehicle. The machining method comprises the following steps that 01, a preset deflection distribution diagram is manufactured; 02, a machining work diagram of an integral side wall is designed; 03, an integral side wall deflection machining tool is designed; 04, deflection machining data are collected, and a machining method for a deflection variable assignment is utilized for machining door frame deflection and rotating angles; 05, door frame machining cutters are selected; 06, after the side wall is integrally installed and welded, the cutters selected in the step 05 are used for machining the welded integral side wall according to the collected deflection compensation value in the step 04. According to the machining method, the problem that parent materials are cut and damaged easily when an upper opening of the door frame of the integral side wall with deflection is machined can be perfectly solved, and a side wall deflection value and a door frame angle rotating value are compensated, so that the position precision relation between welding deformation of side wall parts and the machining structure characteristic is realized; moreover, the product quality is ensured, and the production efficiency is improved.

Description

technical field [0001] The invention discloses a machining method for an integral side wall door frame of an aluminum alloy car body of a rail vehicle, and belongs to the technical field of subway car body manufacturing. Background technique [0002] According to the current manufacturing process requirements of the aluminum alloy subway car body, after the car body is manufactured, the body pillow of the whole car needs to have its own winding requirements, and the verticality of the end wall assembly does not allow inward inclination requirements. In order to meet the above requirements, when the aluminum alloy subway structure is machined with an integral side wall, it is generally preferred to process the integral side wall with a winding degree after welding, and the processing method of the side wall and the length of the lower opening is different. This method has played a very good role in ensuring the size of the subsequent assembly and welding process, reducing the...

AI Technical Summary

Problems solved by technology

In the above process, the automatic welding of large parts of the side wall, the overall machining of the side wall, and the welding of the front and back sides of the side wall all need to be manufactured with winding, so that better tolerance requirements can be obtained after the assembly starting and winding welding. Therefore, the existing technology is generally For single-piece processing; for example, CN101637862A discloses a side wall processing technology of rail aluminum alloy car body, including single-piece side wall panel processing, side wall panel assembly welding, side wall overall clamping, side wall window measurement, side wall window In the steps of overall processing and grinding, the technological process of welding together the aluminum alloy profiles that make up the side wall and then cutting the window can be used to effectively control the influence of welding deformation on the processing accuracy of the window and improve the appearance quality of the product. , to improve production efficiency, however, this patent still belongs to the traditional process of welding first, then clamping, and then measuring and grinding, which is prone to waste of aluminum alloy materials, errors in the measurement process, low precision, low measurement efficiency, and production small increase in efficiency

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