Finish-milling unit of mobile rail-milling car

Abstract

A finish-milling unit of a mobile rail-milling car comprises at least one tool rest (1); the tool rests (1) are connected with milling driving devices (2); the lower end of each tool rest (1) is provided with a milling head (3); the output end of each milling driving device is connected with a drive shaft of the corresponding milling head through a mechanical transmission device; one side of each tool rest (1) is further connected with a group of hydraulic vertical movement and positioning devices (4) and a group of electric horizontal movement and positioning devices (5); each group of hydraulic vertical movement and positioning devices (4) is connected with the corresponding electric horizontal movement and positioning devices (5); the electric horizontal movement and positioning devices (5) are used for positioning the horizontal positions of milling tools. The finish-milling unit has the advantages that a steel rail which is roughed can be finely dressed again, dressing effect is good, and operating efficiency is high; omission of the grinding method for secondary dressing of the steel rail leads to low environmental pollution; owing to the tool rests capable of rotating around their rotational axes, the tool rests and blades on the same are convenient to change.

Description

technical field [0001] The invention relates to a fine milling device of a mobile rail milling car, in particular to a fine milling device of a rail milling car for performing mobile on-line secondary milling on a line rail after rough milling, and belongs to the technical field of engineering equipment . Background technique [0002] In recent years, my country's urban rail transit has developed rapidly. With the increase of traffic volume and operating speed, the problem of rail surface damage has become more and more prominent. The common damages include contact fatigue cracks, corrugation and rail side grinding. If the surface damage of the rail cannot be repaired in time and effectively, it will seriously affect the driving safety and the service life of the rail. [0003] In order to ensure the safety, stability and comfort of train operation, improve the wheel-rail contact state, reduce wheel-rail noise, increase the service life of the rail, slow down the occurrence...

AI Technical Summary

Problems solved by technology

However, since the existing rail milling and grinding vehicles still use the grinding method to cut off the edges and corners and improve the surface finish of the rails during the secondary repair after the rough milling of the rails, although the amount of grinding is smaller than that of the rail grinding vehicles, it is inevitable that there is still damage to the rails. The problem of air and noise pollution, the grinding wheel is severely worn and difficult to replace, and the surface finish of the rail is not high enough after operation

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