High-precision double-side chamfering device for rail drilling

Abstract

The invention relates to the technical field of railway maintenance devices, and discloses a high-precision double-side chamfering device for rail drilling. The high-precision double-side chamfering device comprises a connecting support. Inner ratchet mechanisms are fixedly installed on the two sides of the bottom end of the connecting support correspondingly. A connecting sleeve is movably sleeved with the inner ratchet mechanism on the left side. A movable connecting rod is movably connected into the connecting sleeve. According to the high-precision double-side chamfering device for rail drilling, by arranging a limiting baffle and a force storage spring, when the double-side chamfering device is fixed to a steel rail through the connecting support, the instant extrusion force of the steel rail on a chamfering cutter head can be greatly buffered, the abrasion to the chamfering cutter head is reduced, the service life of the chamfering cutter head is prolonged, sharp corners formed after drilling of the steel rail are protected, the problem that the sharp corners formed after drilling of the steel rail crack due to the too large instant pressure exerted by the connecting supporton the chamfering cutter head when the double-side chamfering device is installed is avoided, and the practicability and reliability of the device are effectively improved.

Description

technical field [0001] The invention relates to the technical field of railway maintenance equipment, in particular to a high-precision double-sided chamfering device for rail drilling. Background technique [0002] When assembling two sections of rails, in addition to fixing them on the track bed, it is also necessary to use fishplates to fix the two sections of rails on the same horizontal line to ensure the flatness and stability of the rails. When the plate connects two sections of rails, it is essential to drill holes at the appropriate positions of the two sections of the rails, and in order to avoid stress concentration at the sharp corners after drilling (stress concentration will cause the rails to be easily The problem of fracture), it is necessary to chamfer both ends of the hole to eliminate the phenomenon of stress concentration at the sharp corner after drilling. [0003] At present, for the chamfering operation of rail drilling, the double-sided chamfering de...

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Problems solved by technology

[0005] The invention provides a high-precision bilateral chamfering device for rail drilling, which can effectively buffer the instantaneous pressure of the chamfering cutterhead on the sharp corner of the drill hole, reduce the wear of the chamfering cutterhead and protect the drilling hole. At the sharp corner, it can ensure that the two groups of chamfering cutter heads rotate at the same time and have the same feed rate, simple operation and high work efficiency, which solves the problem that the existing double-sided chamfering device directly squeezes the chamfering cutter head into the At the sharp corner after drilling, the instantaneous extrusion force between the chamfering cutter head and the sharp corner of the drilling hole is relatively large, resulting in serious wear of the cutter head, and it is more destructive to the drill corner. Under the action of instantaneous extrusion force, it is very easy to cause the sharp corners to be squeezed and cracked, making the holes unusable. Moreover, the existing double-sided chamfering device needs to separately control the cutter heads on both sides and control their feed rate, which is cumbersome and cumbersome to operate. The problem of low work efficiency

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