Academic News

Grinding Stone Performance Evaluation Method The most crucial aspect of the grinding stone development process lies in evaluating and verifying its performance (including size and accuracy, dynamic/static balance, rotational strength, load-bearing capacity, g...

Regular rail grinidng reduces or removes rail damage and extends their service life, which is widely recognized as one of the effective maintenance methods in rail transit systems. Based on the behavior of rail damage and combined with the needs of railway tra...

Grinding is a machining process which an abrasive grinding wheel (GS, as given in Fig.1) is utilized to remove materials at a certain rotating speed [1]. The grinding wheel is composed of abrasives, binding agent, fillers and pores, etc. In which, the abrasive plays a role of cutting edge during the grinding process. 

Rail is one of the most important bearing parts of railway system. The traction and braking of trains are realized by the friction between wheels and rail. Therefore, a good rail condition is the prerequisite to ensure the safe and smooth running of trains. However, due to the alternating contact stresses, the rail material often suffers from wear or fatigue damage. As shown in Figure 1, the main types of rail damage include: fatigue crack, peeling, corrugation wear, crushing and rail side wear, which account for more than 80% of all rail damages. With the increase of train running speed and axle load, the rail fatigue and wear problems become increasingly serious, which causes the demands for rail grinding technologies sharply increased.

High reliability and low burnishing of heavy-haul rails are prerequisites for ensuring the high efficiency of collection and distribution, as well as the operational reliability of heavy-haul railways. However, there are few reports on the research of the grinding behavior mechanism of heavy-haul rails currently.