Optimal design of rail grinding patterns based on a rail grinding target profile

Abstract

Based on the grinding target profile of the rail and the grinding capacity of a single grinding stone, a numerical calculation method for rail grinding patterns that includes grinding angle and grinding power of each grinding stone of the GMC96 rail grinding train was designed and established. By means of this numerical method, the grinding pattern of each grinding pass was optimized and the rail head profile after grinding was calculated. Furthermore, a method for the evaluation of the grinding quality is provided. The results indicate that in multipass rail grinding, a sequence of grinding passes – where the greatest grinding effort is applied on the earlier passes, with the last pass applying reducing levels of grinding effort – produces the highest conformance to the target grinding profile. For example, when rail grinding is planned for two passes, applying 60% of the total grinding effort on the first pass and 40% on the second pass decreases the final grinding error by 7.3%.

Effects of Grinding Passes and Direction on Material Removal Behaviours in the Rail Grinding Process

“…Due to the relatively large volume of removed rail material required from rail grinding in the field, multiple grinding passes are needed [4]. The results of this study show that with the increase in the number of grinding passes, the wear of the grinding wheel increases, while the volume of removed rail material, the grinding ratio, the surface roughness and the grinding force all decrease.…”

“…Rail grinding has widely been used in railways and has been involved in many studies in recent decades. Previous research in the field of rail grinding has mainly focused on the design of rail grinding patterns [1,4], the design of grinding rail profiles [5,6], temperature fields in the rail grinding process [7,8] and grinding train dynamics [9,10]. Many scholars have simulated and analyzed single abrasive particle grinding [11,12,13], which is an important means to understand the grinding process with the entire grinding wheel, as it can magnify the grinding degree and avoid the interference of other abrasive particles.…”

Demiryolu yuvarlanma yüzeyi gürültüsü ve zemin titreşimi ve hat ilişkili azaltma önlemleri-güncel gelişmeler

“…The grinding process comprises some parameters such as the angle of the grinding stone, pressure, and the speed of the grinding train. Numerous studies have attempted to explain the role of rail grinding for referring [84][85][86][87][88][89]. Modern rail grinding techniques do not aim only at treating of corrugation at the rail; also, preventive measurements are the desired goals [90].…”

Simulation research on temperature field and stress field during rail grinding

“…Grinding pattern includes the combination of grinding parameters and grinding wheels positions (distances in the longitudinal direction along rail, and the swing angles of the rail head radius) relative to the rail. [20][21][22] When the rail is ground by a single grinding wheel, the grinding heat is transferred into four parts, i.e. the rail, the grinding wheel, the air, and the grinding debris.…”

“…the swing angles) of grinding wheels were chosen based on the grinding pattern in reference. 20 Figure 2(b) shows the distribution of heat sources on the rail based on the above grinding pattern. The grinding angles of grinding pattern in this study varied from -65.7 � to 12.0 � .…”