Method for machining linear saddle groove of main cable saddle of suspension bridge

Abstract

The invention provides a method for machining a linear saddle groove of a main cable saddle of a suspension bridge. The method uses an ordinary vertical lathe and comprises the following steps of: A, machining an arc surface (9) at the top face of the saddle groove through a numerical control boring miller; B, marking out a theoretical profile line of a saddle groove main curve (8) and a theoretical profile line of auxiliary curves (7) at the both ends at a cable outlet position of an end face of the main cable saddle (1); and C, finely turning a middle groove (21), an inner groove (22), the main curve (8) of an outer groove (23) and a side wall (24) by using an angle turning tool (2.2) on the vertical lathe. The method provided by the invention has the advantages that no undercut phenomenon exits; and the frequency of changing and setting a tool is less, so that not only can the machining efficiency and the surface machining precision of the saddle groove be obviously improved, but also the interchangeability of the same main cable saddle further can be effectively ensured.

Description

technical field [0001] The invention relates to a processing method of mechanical parts, in particular to a processing method of a linear saddle groove of a main cable saddle of a suspension bridge. Background technique [0002] The main cable saddle is a large steel member located on the top of the main tower of the suspension bridge. It is at the turning point of the main cable, providing support for the main cable, and transmitting the entire suspension bridge and its load to the main tower through the main cable saddle. Therefore, the main cable saddle is Important force-bearing components of suspension bridges. Since the inclination of the main cable on both sides of the bridge tower is generally different, the force on the saddle is also different. In order to maintain the stress stability of the main tower, the force curve of the linear saddle has been simply taken from a single The arc of the radius is changed to an arc composed of multiple radii. At the same time, ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of undercutting of the step surface of the saddle groove, low efficiency, and interchangeability of the same saddle body in the processing of linear saddle grooves by CNC boring and milling machines in the prior art, and provide an ordinary vertical lathe Instead of CNC boring and milling machine, it can process a kind of linear saddle groove processing method of main cable saddle of suspension bridge without undercut, high precision, high efficiency and good interchangeability

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