Movable numerical control grinding apparatus for grinding steel rail and control method thereof

Abstract

The invention relates to a movable numerical control grinding apparatus for grinding a steel rail and a control method thereof. A support frame is mounted on a movable basal body; two sets of mutually independent mechanical arms capable of transversely moving are mounted on the support frame; the mechanical arms are controlled by a numerical control system; and grinding apparatuses are mounted on the movable ends of the mechanical arms. Each grinding apparatus comprises a bracket body, a sand wheel self-adaptive feedback apparatus, a positioning boot, a main shaft system and a sand wheel, wherein the main shaft system is mounted below the bracket body; the sand wheel is mounted on the main shaft system; the positioning boot is mounted on the bracket body through a longitudinal servo feeding system and a longitudinal guide rail; the longitudinal servo feeding system is controlled by the numerical control system; the bottom of the positioning boot is in the same horizontal plane with the bottom of the sand wheel in the grinding process; the sand wheel self-adaptive feedback apparatus is connected with the main shaft of the sand wheel; and a variable quantity caused by friction grinding between the sand wheel and the steel rail is fed back to the numerical control system through the sand wheel self-adaptive feedback apparatus. The movable numerical control grinding apparatus has the characteristics of complete function, high working efficiency, high grinding efficiency and grinding precision, high degree of automation and the like.

Description

technical field [0001] The invention relates to a mobile numerical control grinding device suitable for rail grinding and a control method thereof. Background technique [0002] High-speed railways, subways and intercity trains are developing at a high speed in China, and the general speed is above 250km / h. The maximum speed of Beijing-Tianjin intercity trains even exceeds 350km / h. Steel rails are the main basis for carrying trains. Such a high train speed, Strict requirements are put forward for the surface roughness and smoothness of the rail, but the wear and disease of the rail are easy to aggravate under the high-speed running state. This double problem makes the repair of the rail defect an important content. There are two main forms of the car, one is grinding and forming, which is formed by multi-head grinding wheels for grinding. This method can only repair the rails with less damage. When encountering large damage, it must be ground manually Reshaping and repairin...

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Problems solved by technology

[0002] High-speed railways, subways and intercity trains are developing at a high speed in China, and the general speed is above 250km / h. The maximum speed of Beijing-Tianjin intercity trains even exceeds 350km / h. Steel rails are the main basis for carrying trains. Such a high train speed, Strict requirements are put forward for the surface roughness and smoothness of the rail, but the wear and disease of the rail are easy to aggravate under the high-speed running state. This double problem makes the repair of the rail defect an important content. There are two main forms of the car, one is grinding and forming, which is formed by multi-head grinding wheels for grinding. This method can only repair the rails with less damage. When encountering large damage, it must be ground manually Reshaping and repairing, at the same time, the wear of the multi-head grinding wheel is difficult to be consistent, and the grinding accuracy is low; the second is to use the milling and grinding car, first using the forming milling cutter wheel for high-speed milling, and then using the wide grinding wheel for forming grinding, eliminating milling Processing error and forming interface water chestnut, this method has high processing accuracy and wide grinding range, but the grinding device mainly adopts the combination of simple numerical control and manual control, which has low work efficiency and great safety hazards

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