The method of making the adjustment standard of the frame consistent with the processing standard

Abstract

The invention discloses a method for making the adjustment and repair benchmark of a frame keep consistent with the machining benchmark and relates to the field of determination methods for the machining and positioning benchmarks of bogie frames of railway vehicles. According to the method, after the frame is adjusted and repaired, a limiting benchmark is added to the X axis of the frame, two limiting benchmarks are added to the Y axis of the frame and four limiting benchmarks are added to the Z axis of the frame. When the frame is machined, the seven limiting benchmarks are used for being connected with seven limiting units arranged on a machining clamp of the frame, it is guaranteed that the adjustment and repair benchmark of the frame is kept consistent with the machining benchmark, and the problems that the welding size of the frame is out of tolerance and the machining amount of the frame does not exist due to inconsistent benchmarks are solved.

Description

technical field [0001] The invention belongs to the field of determination methods for processing and positioning references of rail vehicle bogie frames, and in particular relates to a method for making frame adjustment references consistent with processing references. Background technique [0002] Such as Figure 1a to Figure 1d As shown, the bogie frame 2 of a rail vehicle is usually an H-shaped structure formed by welding two side girders 2-1 and one cross girder 2-2 arranged in parallel. After the frame 2 is assembled and welded, the size of many components on the frame 2 will change due to the influence of welding deformation. After welding, the frame 2 is often marked by a marking machine to determine the size of each component of the frame. quantity. [0003] The marking machine generally uses the theoretical geometric symmetry center point O of the frame as the origin of the plane Cartesian coordinate system to mark the deformed frame 2. When initially determining ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the frame datum formed after scribing and adjustment of the existing frame is only a line drawn on the surface of the frame, the drawn datum line cannot actually play any role in limiting the position, which will lead to Deviation occurs between the positioning reference captured by the equipment and the frame adjustment and marking reference, which in turn causes the welding size of the final frame to be out of tolerance, and even produces technical problems that some parts of the frame need to be processed but there is no processing amount. The invention provides a A Technological Method to Make the Adjustment Standard of Frame Consistent with the Machining Standard

Images