Automatic laser detector for wheel sets and method for automatically detecting wheel sets

Abstract

The invention discloses an automatic laser detector for railway wheel sets and a method for automatically detecting wheel sets by using the same. The detector comprises a wheel set measuring mechanism, a vertical lifting mechanism, a rotating mechanism, an aligning impetus-turn mechanism and a wheel set stopping mechanism, wherein the wheel set measuring mechanism comprises a shaft body measuring mechanism, a light barrier, a left wheel tread measuring mechanism and a right tread measuring mechanism; the vertical lifting mechanism comprises a base, a lifting cross beam provided with a V-shaped base, a cylinder, an upper shaft neck measuring device and a lower shaft neck measuring device; the wheel set rotating mechanism comprises a friction wheel device, a speed reduction motor, a swing arm, a pressure spring device and a wheel set rotating mechanism base; the aligning impetus-turn mechanism comprises an aligning device and a push wheel device; the wheel set measuring mechanism is arranged on a stand and is used for measuring the parameters of wheel parts of the wheel sets; and the actions of the measuring mechanism, the wheel set vertical lifting mechanism, the wheel set rotating mechanism, the aligning impetus-turn mechanism and the wheel set stop mechanism are controlled by an operation control system. The detector and the method for automatically detecting the wheel sets by using the detector have the advantages of high precision and high speed.

Description

technical field [0001] The invention relates to a detection technology, in particular to a detection technology suitable for detection of wheel tread geometry, wear, inner distance, shaft middle diameter, wheel diameter, rim thickness, rim width, rim thickness, eccentricity, etc. in the maintenance of railway vehicles. A wheel set automatic detection machine and a method for automatic wheel set detection thereof. Background technique [0002] At present, the most installed wheel set automatic detection machine in China's railways is the "wheel set automatic detection device" produced by a factory in Beijing. The distance meter constitutes the detection device, and the wheel set entry positioning and ejection mechanism is connected with the wheel set positioning mechanism and the wheel set rotation mechanism. The detection data of each area array CCD and distance meter are connected with the computer interface. However, due to the measurement principle of the CCD image metho...

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Problems solved by technology

However, due to the measurement principle of the CCD image method used in the design, it is difficult to apply to the measurement of workpieces such as wheel sets with unclear contour boundaries, so its measurement accuracy is very low, and the displayed value varies greatly. Dozens of railway installations across the country None of the stations can be used normally

[0003] The invention patent application with the patent publication number CN101619965A, "Automatic Measuring Device for Wheelsets", applies technologies such as laser triangulation, motion control, and machine vision, and has a self-calibration function, which is used to measure train wheelsets of various specifications. Measurement of dimensional parameters; but because the detection device laser ranging sensor is installed on a three-degree-of-freedom motion mechanism, absolute measurement is performed in a fixed space seat system, and the measurement device moves on a long guide rail, so the whole machine The machining accuracy requirements are very high, and the manufacturing cost is expensive; the workpiece must be accurately positioned in the axial and radial directions of the wheel set during measurement, and the production efficiency is difficult to improve

The measurement time for each wheel set is 5 minutes, which is not suitable for the rapid repair of EMUs and the maintenance requirements of a large number of railway freight vehicles; although this patent can measure wheelsets of various gauges at the same time, this function is not suitable for railway vehicle maintenance. The site is not important, because the railway vehicles are all overhauled in a special unit, and one unit and one station only overhaul vehicles of one gauge. Although the function of adapting to various vehicles is good, the addition of movable guide rails makes the equipment more complicated. In addition, the wheel set clamping and positioning mechanism of this patent design uses the top to clamp the wheel set, and the wheels of the railway operating vehicles have shaft end covers, which cannot be clamped on this machine , therefore, it is not applicable to the detection of wheelsets of railway operating vehicles

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