Method for processing windows on side walls of aluminum alloy car body
An aluminum alloy car body and processing method technology, applied in the direction of comprehensive factory control, digital control, electrical program control, etc., can solve the problems of long manual programming cycle, difficult numerical control manual programming, unfavorable mass production, etc., and shorten the measurement time , Ensure consistency and improve production efficiency
Inactive Publication Date: 2013-09-11
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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Problems solved by technology
For different car models and window types, the position and size are different, and it is difficult for CNC manual programming. The manual programming of a single side wall window processing takes nearly two weeks, and the manual programming cycle is long, which is not conducive to rapid mass production.
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[0018] 1. The distribution of windows on the side wall with deflection
[0019] For the high-speed EMU car body, it is necessary to manufacture the deflection of the bow structure similar to the bridge to obtain better mechanical properties. A certain amount of deflection must be produced. Side walls are key components located on both sides of the car body. After the overall assembly and welding, the window is processed on the side wall with deflection.
[0020] refer to figure 1 , is the schematic diagram of the side wall window given in the design drawings, and the side wall does not have any deflection.
[0021] refer to figure 2 , which means that the position of the window is changed in translation on the side wall with deflection, and the center of each window is translated upward by different distances according to the different deflection values of the position, so that the position of the center of the window changes in an arc along the deflection.
[0022] ref...
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The invention relates to a method for processing windows on side walls of an aluminum alloy car body, which is characterized by comprising the following steps: establishing a deflection model: working out a radius according to known deflection and the length of the car body, and then, deriving out the theoretical deflection values of the centers of all the windows by the radius; detecting errors by adopting a measuring compensation process: measuring deviations between the actual bending values of the side walls and theoretically calculated bending values by utilizing the measuring function of a machine tool, and working out the actual bending values and the rotation angles of the windows through the deviations; developing a processing program capable of automatically compensating the errors to realize accurate processing; and correcting the theoretically calculated bending values according to the measured deviations, and automatically passing the corrected bending values to the processing program of the tool machine according to a parameter passing mode, thereby realizing the accurate processing on the positions of the windows on the side walls. The measuring compensation of the method for processing the windows on the side walls of the aluminum alloy car body can perfectly eliminate the contradiction between the welding deformation and accurate processing position definition, thereby, the consistency between the product quality and the design requirement is ensured. As the theoretical calculation of the deflection values of the side walls is used, and the actual deviations are respectively compensated, a system factor and a chance factor for window position changes after the deflection is generated are distinguished, so that the measuring time is greatly shortened, and the production efficiency is improved.
Description
technical field [0001] The invention discloses a high-speed aluminum alloy car body side wall window processing technology, which belongs to the technical field of rail passenger car manufacturing. Background technique [0002] The traditional processing scheme of the side wall window of the car body is: the deflection model of the side wall is bent and deformed on the 3D model in another auxiliary 3D software, and the window is automatically programmed according to the transformed new model. The 3D software and the automatic programming software need to be Nearly a million. For different car models and window types, the position and size are different, and it is difficult to manually program CNC. The manual programming of a single side wall window processing takes nearly two weeks, and the manual programming cycle is long, which is not conducive to rapid mass production. Contents of the invention [0003] The invention discloses a high-speed aluminum alloy car body side ...
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IPC IPC(8): G05B19/19
CPCY02P90/02
Inventor 鲍洪阳朱艺海
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD