Tight-lock coupler body mechanical manufacturing processes

Abstract

The invention relates to a machining process for a tight-lock coupler body. A rough blank is cast by E-class steel with the thermal treatment hardness of HB241-291. When in machining, a bottom face of a bracket is milled and four installing holes on the bracket are drilled and two of the four installing holes are drilling-hinging position holes; meanwhile, the bottom face of the bracket and the two holes are adopted as a reference, namely, the positioning of one face and two pins, to fulfill the post processing procedures. By adopting the positioning of one face and two pins at the front end, the invention eliminates positioning errors and guarantees the correctness of each positioning and clamping as well as guarantees the center distance of a convex taper hole and a concave taper hole at the front end. In addition, the adoption of the positioning of one face and two pins can also ensures that all the post procedures conduct the positioning on the same reference without calibration of workpieces, which substantially shortens the time for the fixture, improves the efficiency and guarantees the product quality.

Description

technical field [0001] The invention relates to a processing technology for connecting parts between railway vehicles, in particular to a mechanical processing technology for a close-connected coupler coupler body. Background technique [0002] Close-fitting coupler is one of the most basic components of railway vehicles, which can quickly connect railway vehicles, transmit the longitudinal force of the train running process, and can quickly decompose the role of connected vehicles. With the rapid development of railway transportation, close-connected couplers are widely used for their advantages of convenient disassembly, flexible use, high strength, good comfort, safety and reliability. The close-fit coupler body is one of the main components of the close-fit coupler. It is a metal integral part, mainly composed of a convex cone, a convex cone panel, a concave cone, a bracket and a tail connecting flange. The stability of its processing quality, Uniformity of size is very...

AI Technical Summary

Problems solved by technology

[0003] In the past, the mechanical processing method of the close-connected coupler body was generally to mill the bottom surface of the bracket first, to bore the connecting flange at the tail and the reference hole in the center of the flange, and then use the flange surface and the reference hole at the tail to position, and process the convex cone, Several key processes such as turning concave cones and boring T-shaped slots, due to workpiece clamping and human factors, cause large linear errors, and cannot guarantee the consistency of each positioning, affecting the center distance of the front convex cone and concave cone. Most of the processes in the mechanical processing method of the close-connected coupler coupler are positioned by alignment, which is inaccurate, low in efficiency, and likely to cause unstable quality

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