Technical method for longitudinal dimension amplification of assembling of aluminum alloy chassis frame

Abstract

The invention discloses a technical method for longitudinal dimension amplification of assembling of an aluminum alloy chassis frame. The method is characterized by comprising the following steps: (1) analyzing a main body structure of the chassis frame; (2) performing longitudinal dimension amplification analysis of the chassis frame; (3) according to the dimension amplification analysis in step (2), as well as vehicle body manufacturing technical condition and standard analysis, acquiring the dimension amplification of the total longitudinal length of the chassis frame; (4) re-analyzing the amplification demand determined in step (2) so as to determine the longitudinal length amplification of a front-end chassis in the previous process, if the longitudinal length amplification is reasonable, analyzing and determining the longitudinal dimension amplification of the chassis frame according to the dimension amplification of the total longitudinal length of the chassis frame; and if the longitudinal length amplification is not reasonable, the steps 1-4 are repeatedly performed. The technical method is provided for solving the problem that the dimension of the chassis is out of tolerance due to unreasonable or inaccurate technical amplification in the assembling process of the profile type chassis frame, the product quality is guaranteed, and the production efficiency is improved.

Description

technical field [0001] This application belongs to the field of welding, and specifically designs a process method for assembling the longitudinal dimension of an aluminum alloy underframe frame. Background technique [0002] The aluminum alloy car body chassis frame currently used for rail vehicles, the common main structure is a profile-type chassis frame structure that is welded by front-end chassis, side beams, multiple beams, and longitudinal beams, and the chassis frame is welded After the rigidity is integrated, the floor is paved and the accessories are welded. This kind of underframe frame structure has the characteristics of many types of profiles, a large number of welds, and large deformation. The longitudinal dimension of the chassis frame changes greatly after welding. If the vertical dimension of the chassis frame assembly is unreasonable, the subsequent process cannot be carried out smoothly, and the product may even be scrapped. [0003] Therefore, for this...

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Problems solved by technology

[0005] The process method for assembling the longitudinal dimension of the aluminum alloy underframe frame according to the present invention is proposed to solve the problem that the size of the underframe is out of tolerance due to unreasonable or inaccurate process during the assembly process of the profile type underframe frame Through the analysis of the main structure of the underframe frame, the production process route is clarified, and the flow chart concept of analyzing the data chain of the longitudinal correlation size of the underframe frame is proposed, and the longitudinal dimension of the underframe frame is analyzed by division. The specific assignment function and the interval comparison method of the tolerance limit assignment of the side beam machining have determined the tolerance range of the longitudinal dimension of the front-end chassis in the previous process and the tolerance range of the spacing between the pre-assembled pillows of the chassis frame, ensuring that the process of the chassis frame is reasonable. It also provides a data theory basis for the formulation of the front-end chassis production process in the upper process, thereby ensuring product quality and improving production efficiency.

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