Fixture for one-step processing of traction beam of railway car bogie

Abstract

The invention provides a one-step machining fixture for a bogie towing beam of railway vehicle and belongs to the field of welding positioning auxiliary fixtures for the bogie towing beams of the railway vehicles. The fixture comprises a centering device, a base plate, an end plug, a U-shaped pressing plate, a nut and two pairs of positioning stop dogs; the centering device comprises a core disc, a core shaft, three top shafts, a tension spring, a compression spring and an anti-rotating pin. The one-step machining fixture is based on the centering principle of a triangle inscribed in a circle; the three positioning top shafts extending synchronously are utilized to perform once accurate positioning on the axis of the rotating shaft of a cylinder workpiece, and therefore, the defects of complex steps and low accuracy of a traditional marking positioning method are overcome. Besides, the fixture further has the advantages of simple and practical structure, convenient operations, low cost, convenience for popularization and the like.

Description

technical field [0001] The invention belongs to the field of auxiliary tooling for welding and positioning of a traction beam of a rail vehicle bogie, and in particular relates to a one-step processing fixture for a traction beam of a rail vehicle bogie. Background technique [0002] Such as Figure 11 As shown, two groups of orifice plates 12-2 need to be welded on the periphery of the outer wall of the center tube pipe fitting 12-1 for the traction beam 12 of the railway vehicle bogie, and the two groups of orifice plates 12-2 should be rotated around the axis of the traction beam pipe fitting. symmetry. [0003] The traditional processing and positioning method is: after the two sets of orifice plates 12-2 are assembled and welded, the geometric center and reference axis of the entire drawbeam pipe fitting are determined by the respective screw hole end planes of the two sets of orifice plates 12-2, and then press the The datum axis determines the finishing allowance for...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of existing Hong Kong subway bogie traction beams because the center tube is prone to welding deformation, the traditional scribing processing positioning method cannot ensure the axis positioning accuracy of the center tube, and it is easy to cause the inner wall of the center tube to be in the middle. Insufficient or even no processing volume occurs in the subsequent finishing process, resulting in the technical problem of reduced product qualification rate. The invention provides a one-step processing fixture for the traction beam of the rail passenger car bogie

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