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Vehicle body assembly tolerance distribution method

An allocation method and assembly tolerance technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of not considering the influence of welding deformation and the lack of accuracy and effectiveness of tolerance allocation, so as to improve accuracy and effectiveness Effect

Pending Publication Date: 2020-07-10
CRRC TANGSHAN CO LTD
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Problems solved by technology

[0003] In the existing dimensional chain tolerance distribution method of the car body, only the rigid dimensional chain in the assembly process is analyzed, and the influence caused by the welding deformation in the assembly process is not considered, resulting in the lack of accuracy and effectiveness of the tolerance distribution of the existing car body. question

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  • Vehicle body assembly tolerance distribution method

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Embodiment Construction

[0031] In the process of realizing the present application, the inventor found that the existing dimensional chain tolerance allocation method of the car body only analyzes the rigid dimensional chain in the assembly process, and does not consider the influence caused by welding deformation in the assembly process, resulting in the existing The tolerance assignment of the bodywork lacks accuracy and effectiveness.

[0032] In view of the above problems, the embodiment of the present application provides a vehicle body assembly tolerance allocation method. The tolerance allocation method simulates the established three-dimensional assembly tolerance analysis model, determines the optimization goal and optimization plan through the simulation simulation, and considers In the case of welding deformation, the welding deformation is compensated by moving tolerances. This tolerance allocation method not only analyzes the rigid dimension chain, but also considers the influence of weld...

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Abstract

The embodiment of the invention relates to the technical field of rail vehicle design, in particular to a vehicle body assembly tolerance distribution method. The vehicle body assembly tolerance distribution method comprises the steps of establishing a three-dimensional assembly tolerance analysis model of a vehicle body; performing analogue simulation on the tolerance analysis model; determiningan optimization target; determining an optimization scheme; and performing welding deformation compensation on the optimization target based on the movement tolerance. Tolerance distribution is carried out under the condition of considering welding deformation, and the accuracy and effectiveness of tolerance distribution can be improved.

Description

technical field [0001] The present application relates to the technical field of rail vehicle design, and in particular, relates to a method for allocating vehicle body assembly tolerances. Background technique [0002] With the rapid development of railway technology, the ever-increasing train speed has put forward higher requirements for the rail transit equipment manufacturing industry. EMU train is an important core equipment to realize railway speed increase. The assembly accuracy of its car body is the premise and guarantee for the train to meet the design requirements of driving safety, riding comfort and running stability. In order to further improve the manufacturing accuracy of the car body, on the basis of combining the traditional car body development methods that mainly rely on experience and physical prototypes, it is also necessary to use digital means to optimize the analysis of car body assembly tolerances in the product design stage, so as to realize High-...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06T17/00
CPCG06T17/00Y02T10/40
Inventor 侯秀娟李志敏张道刘刘东军刘金玉
Owner CRRC TANGSHAN CO LTD
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