CN-121980826-A - Automatic generation method of steel rail layered polishing scheme based on profile matching

CN121980826ACN 121980826 ACN121980826 ACN 121980826ACN-121980826-A

Abstract

The invention provides an automatic generation method of a steel rail layered polishing scheme based on profile matching, relates to the technical field of track maintenance, and solves the problems of inaccurate polishing parameter setting, insufficient equipment adaptation flexibility and the like of the existing steel rail polishing scheme. The method comprises the steps of obtaining an actual measurement profile and a target profile of a steel rail, setting polishing equipment parameters, engineering constraint parameters and algorithm threshold parameters, calculating polishing quantity distribution based on differences of the actual measurement profile and the target profile, adopting a layered progressive strategy to iteratively generate a multi-pass polishing scheme of a single-side track, updating the iterative process by simulating the polishing profile, and generating synchronous polishing schemes of double-side tracks after the polishing passes are completed based on the tracks on the left side and the right side respectively. The invention can automatically generate a polishing scheme comprising the polishing times, the polishing angles of each grinding wheel and the power, realizes the layering progressive from coarse grinding to fine grinding, and is suitable for polishing wagon equipment of different models.

Inventors

WANG JUNGANG
Nai Zongpeng
MO XINGYU
WANG ZHULIN
Tuo rujun

Assignees

成都西交轨道交通技术服务有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. The automatic generation method of the steel rail layered polishing scheme based on profile matching is characterized by comprising the following steps of: S1, acquiring actual measurement profile data and target profile data of a steel rail, and setting polishing equipment parameters, engineering constraint parameters and algorithm threshold parameters, wherein the polishing equipment parameters comprise the total number of single-side polishing grinding wheels and the number of linkage grinding wheels, the engineering constraint parameters comprise the maximum polishing surface width limit and the polishing depth limit corresponding to different areas of the steel rail, and the algorithm threshold parameters comprise a smoothness threshold, a polishing angle interval threshold, a polishing depth pause threshold and a polishing angle range; S2, calculating polishing quantity distribution based on the difference between the actually measured profile data and the target profile data, adopting a layered progressive strategy to iteratively generate a multi-pass polishing scheme of a single-side track by combining the polishing equipment parameters, the engineering constraint parameters and the algorithm threshold parameters; S3, determining double-side synchronous polishing times based on the single-side polishing schemes respectively generated by the left and right side rails, and complementarily setting smooth polishing parameters for the side with less polishing times to generate a synchronous polishing scheme of the double-side rails; s4, outputting the synchronous polishing scheme of the double-side track to polishing equipment, wherein the synchronous polishing scheme comprises polishing angles and power parameters corresponding to all grinding wheels in all polishing passes.
2. The automatic generation method of the steel rail layered grinding scheme is characterized in that in the step S1, engineering constraint parameters are set in a dividing mode according to curvature arc sections of a standard profile of the steel rail, the steel rail is 60kg/m steel rail, the corresponding curvature arc sections comprise a rail top R300 arc section, a R80 arc section and a R13 arc section, and a corresponding maximum grinding face width limit value and a grinding depth limit value are set for each curvature arc section respectively.
3. The method for automatically generating a layered grinding scheme for steel rails according to claim 1, wherein in the algorithm threshold parameters of step S1, the smoothness threshold is set to a specific value according to the smoothness engineering requirement of the profile of the steel rail, and the grinding angle interval threshold is set to be The polishing depth pause threshold is set as The polishing angle range is set as To the point of 。
4. The method for automatically generating the layered grinding scheme for the steel rail according to claim 1, wherein in the step S2, the layered progressive strategy comprises a rough grinding stage and a fine grinding stage; and in the rough polishing stage, aligning the actually measured profile with the target profile, generating a polishing amount curve, selecting the angle position with the largest current polishing amount as a starting point, distributing polishing angles for the linkage polishing wheel set, maintaining a polished angle table, adjusting the angles to be distributed when each distribution is performed, enabling the difference value between the angles to be distributed and all recorded angles in the polished angle table to be not smaller than the polishing angle interval threshold value, calculating the theoretical required polishing depth under the angles to be distributed, if the theoretical required polishing depth is smaller than the polishing depth pause threshold value, or the single polishing depth exceeds the theoretical required polishing depth, terminating the rough polishing stage and transferring the rough polishing stage into the finish polishing stage, otherwise, setting the polishing angle of the linkage polishing wheel set as the adjusted angle, setting the power as the maximum power, recording the adjusted angle to the polished angle table, and continuing iteration after updating the current profile data based on the simulation polishing result corresponding to the distribution.
5. The method for automatically generating a layered grinding scheme for steel rails according to claim 4, wherein in the finish grinding stage, when the theoretical required grinding depth is greater than the grinding depth pause threshold, logically distributing grinding wheel parameters according to the angle distribution of the rough grinding stage, and dynamically adjusting the grinding wheel power to enable the single grinding depth to be equal to or smaller than the theoretical required grinding depth; After polishing of the steel rail main body is completed, detecting the length and the center angle of a light band of the current profile, if the length of the light band exceeds a preset limit value, redesigning polishing angle and power parameters of a linkage sand wheel set according to the starting point or the end point angle of the overrun light band, updating the profile based on a corresponding simulation polishing result, detecting again, and performing circulation until the light band parameters meet the limit value requirement.
6. The method for automatically generating a layered grinding scheme for steel rails according to claim 5, wherein when the length of the light band exceeds a preset limit value, a side angle with a longer light band extending near a starting point or an ending point of the overrun light band is selected as a setting basis of the grinding angle of the linkage grinding wheel set, and the grinding power of the grinding wheels in the linkage grinding wheel set is determined by taking the maximum required grinding depth corresponding to the side angle position as an upper limit value.
7. The method of claim 5, wherein in the single polishing step, the remaining grinding wheels after polishing the main body of the steel rail and correcting the light band are uniformly distributed in the polishing angle range, the polishing angles of the grinding wheels are adjusted to have a difference value with the center angle of the existing light band not smaller than the polishing angle interval threshold, and smooth polishing operation is performed with minimum power, based on the corresponding simulated polishing result, until the smoothness parameter of the updated profile meets the smoothness threshold.
8. The method for automatically generating the layered grinding scheme of the steel rail according to claim 1, wherein in the step S3, the grinding times of the single-side grinding scheme of the tracks on the left side and the right side are compared, the larger value of the two grinding times is taken as the synchronous grinding times on the two sides, the grinding times which need to be supplemented are calculated on the side with the smaller grinding times, the light band distribution state of the current profile after the simulation grinding is detected, a uniformly distributed grinding angle sequence is generated, the grinding angles are adjusted, the difference value between the grinding angles and the center angle of the existing light band is not smaller than the grinding angle interval threshold, and the supplement smooth grinding operation is executed by adopting the minimum power.
9. The method for automatically generating the layered grinding scheme for the steel rail according to claim 1, wherein in the step S2, the grinding amount distribution is realized by constructing a grinding amount curve, the grinding amount curve is drawn by taking a grinding angle as an abscissa axis and taking a normal distance of an actually measured profile and a target profile at a corresponding angle position as an ordinate axis, and a region surrounded by the curve represents a distribution form of materials to be removed.
10. The automatic generation method of the steel rail layered grinding scheme is characterized in that in the step S1, the total number of the single-side grinding wheels is set to be a positive integer, the number of the linkage grinding wheels is set to be a positive integer which is not more than the total number of the single-side grinding wheels, the total number of the single-side grinding wheels and the number of the linkage grinding wheels are valued, and the adaptation setting is carried out according to the grinding wheel configuration parameters of grinding equipment carried by an actual grinding vehicle model.

Description

Automatic generation method of steel rail layered polishing scheme based on profile matching Technical Field The invention relates to the technical field of track maintenance, in particular to an automatic generation method of a steel rail layered polishing scheme based on profile matching. Background The steel rail is used as a core bearing component of a railway line and directly bears complex dynamic load among wheel rails in train operation, and the profile accuracy and the surface integrity of the steel rail have decisive influence on transportation safety, operation stability and line operation efficiency. In the long-term service process, the steel rail is subjected to multiple factors such as wheel rail friction, impact vibration and the like, and damages such as abrasion, wave abrasion, plastic deformation and the like are inevitably generated. If the maintenance is not timely or the treatment is improper, the steel rail degradation is accelerated, the service life is shortened, the maintenance cost of the whole life cycle is increased, and even serious potential safety hazards such as derailment are induced. Therefore, the scientific implementation of rail polishing is a key maintenance measure for guaranteeing the line state and prolonging the service life of equipment, and the accuracy and adaptability of a polishing scheme directly determine the work effect. The scheme formulation of the current steel rail polishing operation still highly depends on the experience judgment of field personnel and the application of the existing template library. Grinding parameters such as grinding wheel arrangement angle, operation power, grinding pass number and the like lack quantitative analysis basis based on the difference between the actually measured profile and the target profile, and history cases are set or simply matched by subjective experience. The mode is difficult to carry out differential design aiming at actual damage characteristics of steel rails in different sections, the situation that the profile cannot be effectively repaired due to insufficient polishing amount is easily caused, or the material is invalid and lost due to excessive polishing, so that the profile recovery quality is influenced, and the operation resource utilization efficiency is reduced. In the prior art, an automatic logic chain from profile data analysis to polishing parameter generation is not established, the scheme generation process lacks the capability of deep mining and intelligent deduction of measured data, and a complete polishing strategy adapting to a specific damage form cannot be dynamically output. Meanwhile, most schemes are strongly related to specific polishing equipment structures, so that the engineering requirements of different grinding wheel configurations or operation platforms are difficult to flexibly adapt, and the popularization and application of technical achievements in diversified maintenance scenes are restricted. In operation execution, due to lack of a high-precision mapping mechanism between profile deviation and polishing action, the degree of coincidence between the polished profile and a design target fluctuates greatly, and is interfered by factors such as personnel skills, environmental conditions and the like, the consistency of polishing quality in different sections or in different periods of the same line is difficult to ensure, and the overall smoothness and long-term service performance of the line are affected. Although the industry has primarily focused on the association of profile features with sanding processes, a technical system has not been established that communicates measurement analysis, parameter deduction and job execution. The prior art has obvious short plates in the aspects of data driving decision, scheme self-adaptive generation and multi-equipment compatibility, and is difficult to meet the increasingly-improved requirements of modern railway maintenance on operation precision, efficiency and standardization. Industry needs a technical path which can deeply fuse profile difference characteristics, realize intelligent deduction of a grinding strategy and has good engineering applicability so as to promote the steel rail grinding operation to evolve to accurate, automatic and standardized directions. Disclosure of Invention The invention aims to solve the problems that the existing steel rail polishing scheme design excessively depends on manual experience and a fixed template, lacks scientific quantitative analysis and intelligent decision making mechanisms based on the difference between an actual measurement profile and a target profile, and further causes inaccurate polishing parameter setting, poor operation quality stability, insufficient equipment adaptation flexibility and low overall process collaborative efficiency. The invention provides the rail layered polishing scheme automatic generation method based on profile matching, which can automatical