A rapid design method for grinding target profile of worn rails

Abstract

The invention discloses a method for quickly designing a target profile of a worn rail grinding, which relates to the technical field of rail grinding, including measuring the vertical wear and lateral wear of each part of the worn rail, dividing the worn rail into a straight section and a curved section; judging whether the entire straight section is directly replaced or repaired by grinding, analyzing the wear state of each section of the rail in the straight section, and determining the representative wear profile of each section of the rail; judging whether a section of the rail corresponding to the measuring point is directly replaced or repaired by grinding, and determining the representative wear profile of each section of the rail in the curved section; determining the grinding target profile, and comparing and smoothly transitioning the grinding target profiles of the end points of each section of the rail, splicing the complete grinding target profile data of the rail according to the sequence number, and outputting the grinding profile plan of the worn rail. It is helpful to formulate a more refined maintenance plan and take different repair measures for rails with different degrees of wear.

Description

Technical Field

[0001] The invention relates to the technical field of rail grinding, in particular to a method for quickly designing a target profile for grinding a worn rail. Background Art

[0002] In the railway transportation system, rails, as an important part of the track structure, bear dynamic loads and long-term stress concentration from train travel, resulting in various forms of damage during service, such as wheel-rail side wear, rail angle cracks, corrugation wear, rail head crushing, block peeling, rail top abrasion, etc. These defects not only affect the quality of train operation, but also threaten driving safety and increase commercial operating costs. Therefore, regular grinding of rails to eliminate or mitigate these defects is an important means to ensure railway transportation safety and extend the service life of rails.

[0003] In a Chinese invention application with application publication number CN106951657A, a method for rapid design of a target profile for grinding a worn rail is disclosed, including using a cubic NURBS curve to construct a parametric model of the wear profile; using the adjustable weight factors of the NURBS parametric model of the worn rail profile as design variables, and the wheel-rail contact stress and wheel-rail dynamic performance indicators as dependent variables, to establish a Kriging model of the performance of the target profile for grinding a worn rail; using the adjustable weight factors as design variables and the Kriging model of the performance of the target profile for grinding a rail as an objective function, to establish an optimization design model for the target profile for grinding a rail, and to achieve the optimal design of the target profile for grinding a worn rail.

[0004] In the above invention application, a parametric model of the wear profile is constructed using a cubic NURBS curve, and the adjustable weight factors of the NURBS parametric model of the worn rail profile are used as design variables, and the wheel-rail contact stress and the wheel-rail dynamic performance index are used as dependent variables. A Kriging model of the target profile performance of the worn rail grinding is established. However, the worn rail profile is obtained by using a rail profile scanner to obtain the coordinate values ​​of the data points of the worn rail cross-sectional profile, which are used as the type value points of the NURBS curve to construct a parametric model of the worn rail grinding cross-sectional profile curve based on the cubic NURBS curve. In other words, a grinding profile analysis is performed on each point, which makes the calculation amount very large. For severely damaged rails, grinding can no longer meet the use requirements, and the grinding profile analysis is still performed on each point on the rail, wasting time and calculation costs.

[0005] To this end, the present invention provides a method for quickly designing a target profile for grinding a worn rail. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the shortcomings of the prior art, the present invention provides a method for quickly designing the target profile of grinding of worn rails. The present invention divides the worn rails into curved segments and straight segments for separate analysis. First, it analyzes whether the damage degree of the rails in the segment requires grinding profile analysis, and then performs detailed analysis on each section of the rails in the segment. This helps to formulate a more refined maintenance plan and take different repair measures for rails with different degrees of wear, thereby solving the technical problems recorded in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for quickly designing a target profile for grinding a worn rail, comprising the following steps:

[0010] Measure the vertical wear and side wear of each part of the worn rail, and number the measurement points of the worn rail in sequence according to the measurement time sequence, calculate the slope K1 of each measurement point with the previous measurement point with the previous sequence number and the slope K2 of the next measurement point with the next sequence number, divide the measurement points into straight line segment points or curve segment points according to the relationship between K1 and K2, traverse the entire point set, mark the starting point and ending point of the straight line segment and the curve segment, and divide the worn rail into straight line segment and curve segment;

[0011] The average vertical wear through each straight line segment , average side wear and average total wear The relationship between the wear state of each rail section in the straight line segment and the severe damage threshold is used to determine whether the entire straight line segment should be directly replaced or repaired by grinding. If the straight line segment is repaired by grinding, the wear state of each rail section in the straight line segment is further analyzed to determine the representative wear profile of each rail section.

[0012] The vertical wear value at each measuring point in the curve segment , Side wear and total wear The relationship between the critical injury threshold and the critical injury threshold is used to determine whether the rail section corresponding to the measurement point should be directly replaced or repaired by grinding. If the rail section is repaired by grinding, the limit difference coefficient of the rail is calculated. , according to the limit difference coefficient of rail and curve segment limit difference threshold The representative wear profile of each rail section in the curve section is determined by the relationship between

[0013] The target grinding profile is determined based on the initial rail head curve and representative wear profile data of the rail, and the target grinding profiles of the end points of each rail section are compared and smoothly transitioned. After the complete target grinding profile data of the rail are spliced ​​according to the sequential numbering, the grinding profile plan of the worn rail is output.

[0014] Furthermore, the wear measuring instrument is brought into contact with and aligned with the starting point of the worn rail, and automatically moves along the worn rail to the end point of the worn rail, measures the vertical wear and side wear at various locations of the worn rail, and records the measurement time and position coordinates of the measurement points of the worn rail.

[0015] Rail wear gauges usually measure the wear depth of the rail surface mechanically or electronically. Mechanical gauges usually use vernier calipers or similar principles for measurement, while electronic gauges may use advanced technologies such as lasers and ultrasound for non-contact measurement. These measurement data can be displayed intuitively on the instrument for staff to read and analyze, and some models have automatic mobile measurement capabilities.

[0016] Furthermore, the measurement time and position coordinates of the worn rail measurement points are obtained, the worn rail measurement points are numbered sequentially according to the measurement time sequence, and the slope K1 of each measurement point and the slope K2 of the next measurement point are calculated. If , then the measurement point is divided into a straight line segment point, if , then the measurement point is divided into curve segment points, the entire point set is traversed, the start and end points of the straight segment and the curve segment are marked, and the worn rail is divided into straight segment and curve segment.

[0017] Furthermore, the vertical wear value of each measuring point on each straight line segment is obtained. and side wear , and the average vertical wear of each measuring point in each straight line segment is obtained by statistics. and average side wear , calculate the average total wear of each straight line segment :

[0018]

[0019] in, i Indicates the sequential number of each section of worn rail, , j Indicates the sequential number of each section of spliced ​​rails in the same section of worn rails. , k Indicates the sequential numbering of the measuring points within the same section of the worn rail. , the superscript Z indicates a straight line segment;

[0020] Determine the average vertical wear of each straight line segment , average side wear and average total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an alert for replacing the straight segment will be issued, indicating that all rails in the straight segment have been severely damaged and cannot be used any longer.

[0021] Furthermore, if all the wear values ​​of the straight line segment are not greater than the severe injury threshold, the vertical wear values ​​of each measuring point of the straight line segment are obtained. and side wear , calculate the total wear at each measuring point :

[0022]

[0023] Determine the vertical wear amount at each measuring point , Side wear and total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an early warning for measuring point replacement will be issued, indicating that the section of rail corresponding to the measuring point has been severely damaged and cannot be used any longer.

[0024] Furthermore, the remaining rails without severe damage measurement points in the straight line segment are obtained, and the vertical wear value of each measurement point is obtained. and side wear , calculate the wear change rate of each measuring point in each rail section and straight line wear change threshold :

[0025]

[0026] When the wear change rate of the measuring point in each rail section Exceeding the straight line wear change threshold When the rail is worn unevenly, the total wear The largest measurement point profile is the target profile for designing the grinding profile to represent the wear profile;

[0027] When the wear change rate of the measuring point in each rail section Does not exceed the straight line wear change threshold When the rail is worn evenly, the average vertical wear and average side wear The formed profile is designed as the target profile for polishing, representing the wear profile.

[0028] Furthermore, the vertical wear value of each measuring point in each curve segment is obtained. and side wear , calculate the total wear at each measuring point :

[0029]

[0030] Among them, the superscript Q represents the curve segment;

[0031] Determine the vertical wear amount at each measuring point , Side wear and total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an early warning for measuring point replacement will be issued, indicating that the section of rail corresponding to the measuring point has been severely damaged and cannot be used any longer.

[0032] Furthermore, the remaining rails without severe damage measurement points in the curve section are obtained, and the vertical wear value of each measurement point is obtained. and side wear , calculate the limit difference coefficient of each rail section in the curve section and the limit difference threshold :

[0033]

[0034] When the limit difference coefficient of rail Does not exceed the limit difference threshold When the maximum wear difference of this section of rail is small, the total wear amount The largest measuring point profile is the representative wear profile and the polishing target profile is designed.

[0035] Furthermore, when the limit difference coefficient of the rail Exceeding the curve segment limit difference threshold When the rail wear is different, it means that the rail wear difference is large. The maximum measuring point and the corresponding rail section end profile are used as representative wear profiles to design the grinding target profile, and a smooth transition is used between the measuring point with the largest total wear and the corresponding section end point to achieve the grinding target profile design of the entire rail section.

[0036] Furthermore, the initial rail head curve data of the rail is obtained according to the design drawing of the rail, the initial rail head curve and the representative wear profile data are converted into the same coordinate system and aligned, and all points of the initial rail head curve are moved downward according to the set translation amount. If the initial rail head curve after the movement does not completely fall into the representative wear rail profile, the translation operation is repeated. When all points on the initial rail head curve after the movement fall into the representative wear rail profile, it is considered that the convergence condition is met, the translation operation is stopped, and the closed figure formed by the initial rail head curve and the lower half of the representative wear profile is used as the grinding target profile of the representative wear profile.

[0037] Furthermore, the grinding target profile of each rail section end point is obtained and compared with the grinding target profile of the adjacent rail section end points. A 1m buffer zone is set for the rail section end point with a large profile area, and a smooth transition is made from the adjacent grinding target profile to the grinding target profile of this rail.

[0038] (III) Beneficial effects

[0039] The present invention provides a method for quickly designing a target profile for grinding a worn rail, which has the following beneficial effects:

[0040] 1. Measure the vertical wear and side wear of the worn rail at various locations, and number the measurement points of the worn rail in sequence according to the measurement time sequence. Calculate the slope K1 of each measurement point with the previous sequentially numbered measurement point and the slope K2 of the next sequentially numbered measurement point. According to the relationship between K1 and K2, divide the measurement points into straight line segment points or curve segment points, traverse the entire point set, mark the start and end points of the straight line segment and the curve segment, and divide the worn rail into straight line segments and curve segments. This can more accurately identify which areas require detailed analysis of the grinding profile. For the severely worn curve segments, resources can be concentrated for detailed wear analysis, while for the relatively lightly worn and stable straight line segments, wear analysis can be reduced accordingly, and resources can be reasonably allocated to areas that need more attention, significantly improving the overall efficiency of the grinding target profile design.

[0041] 2. Average vertical wear through each straight line segment , average side wear and average total wear The relationship between the straight line segment and the severe injury threshold is used to determine whether the entire straight line segment should be directly replaced or repaired by grinding. If the straight line segment is repaired by grinding, the wear state of each rail section in the straight line segment is further analyzed to determine the representative wear profile of each rail section. This can accurately determine whether the degree of wear of the entire straight line segment has reached the standard for replacement. If the degree of wear of the entire straight line segment has not reached the standard for replacement, the representative wear profile of each rail section is further analyzed to determine. This helps to formulate a more refined maintenance plan and take different repair measures for rails with different degrees of wear.

[0042] 3. The vertical wear amount at each measuring point in the curve segment , Side wear and total wear The relationship between the critical injury threshold and the critical injury threshold is used to determine whether the rail section corresponding to the measurement point should be directly replaced or repaired by grinding. If the rail section is repaired by grinding, the limit difference coefficient of the rail is calculated. , according to the limit difference coefficient of rail and curve segment limit difference threshold The relationship between the wear and tear of each rail section in the curved section can be determined, and a more targeted grinding strategy can be formulated for the curved section, which provides a reference for subsequent maintenance work and helps to achieve standardization and regularization of maintenance work.

[0043] 4. Determine the target grinding profile based on the initial rail head curve and representative wear profile data of the rail, compare and smoothly transition the target grinding profiles of the end points of each rail section, splice the complete target grinding profile data of the rail according to the sequence number, and output the grinding profile plan of the worn rail. This can more accurately determine the profile shape that needs to be restored for each rail section, while also taking into account the impact of the splicing between rails on the smoothness of train operation, avoiding over-grinding or under-grinding, and reducing the risk of safety accidents such as train derailment due to poor rail profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic flow chart of a method for quickly designing a target profile for grinding a worn rail according to the present invention;

[0045] Figure 2 It is a schematic diagram of determining the grinding target profile according to the representative wear profile according to the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1 to Figure 2 The present invention provides a method for quickly designing a target profile of a worn rail grinding, comprising the following steps:

[0048] Step 1: Measure the vertical wear and side wear of each part of the worn rail, and number the measurement points of the worn rail in sequence according to the measurement time sequence, calculate the slope K1 of each measurement point with the previous sequentially numbered measurement point and the slope K2 of the next sequentially numbered measurement point, divide the measurement points into straight line segment points or curve segment points according to the relationship between K1 and K2, traverse the entire point set, mark the starting and ending points of the straight line segment and the curve segment, and divide the worn rail into straight line segment and curve segment.

[0049] The step 1 comprises the following steps:

[0050] Step 101, the wear measuring instrument is brought into contact with and aligned with the starting point of the worn rail, and automatically moves along the worn rail to the end point of the worn rail, and the vertical wear and side wear of each part of the worn rail are measured, and the measurement time and position coordinates of the measurement points of the worn rail are recorded.

[0051] Rail wear gauges usually measure the wear depth of the rail surface mechanically or electronically. Mechanical gauges usually use vernier calipers or similar principles for measurement, while electronic gauges may use advanced technologies such as lasers and ultrasound for non-contact measurement. These measurement data can be displayed intuitively on the instrument for staff to read and analyze, and some models have automatic mobile measurement capabilities.

[0052] Step 102: Obtain the measurement time and position coordinates of the worn rail measurement points, number the worn rail measurement points in sequence according to the measurement time sequence, calculate the slope K1 of each measurement point with the previous sequence numbered measurement point and the slope K2 of the next sequence numbered measurement point, if , then the measurement point is divided into a straight line segment point, if , then the measurement point is divided into curve segment points, the entire point set is traversed, the start and end points of the straight segment and the curve segment are marked, and the worn rail is divided into straight segment and curve segment.

[0053] When using, combine the contents in steps 101 and 102:

[0054] The vertical wear and side wear of the worn rail are measured, and the measurement points of the worn rail are numbered in sequence according to the measurement time sequence. The slope K1 of each measurement point and the slope K2 of the measurement point with the previous sequence number are calculated. The measurement points are divided into straight segment points or curve segment points according to the relationship between K1 and K2. The entire point set is traversed to mark the start and end points of the straight segment and curve segment. The worn rail is divided into straight segment and curve segment, which can more accurately identify which areas need detailed analysis of the grinding profile. For the curve segment with severe wear, resources can be concentrated for detailed wear analysis, while for the straight segment with relatively light wear and stable state, the wear analysis can be reduced accordingly, and resources can be reasonably allocated to the areas that need more attention, which significantly improves the overall efficiency of the grinding target profile design.

[0055] Step 2: Average vertical wear through each straight line segment , average side wear and average total wear The relationship between the straight line segment and the severe injury threshold is used to determine whether the entire straight line segment should be directly replaced or repaired by grinding. If the straight line segment is repaired by grinding, the wear state of each rail section in the straight line segment is further analyzed to determine the representative wear profile of each rail section.

[0056] The step 2 comprises the following steps:

[0057] Step 201: Obtain the vertical wear amount of each measuring point of each straight line segment and side wear , and the average vertical wear of each measuring point in each straight line segment is obtained by statistics. and average side wear , calculate the average total wear of each straight line segment :

[0058]

[0059] in, i Indicates the sequential number of each section of worn rail, , j Indicates the sequential number of each section of spliced ​​rails in the same section of worn rails. , k Indicates the sequential numbering of the measuring points within the same section of the worn rail. , the superscript Z represents a straight line segment.

[0060] Determine the average vertical wear of each straight line segment , average side wear and average total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an alert for replacing the straight segment will be issued, indicating that all rails in the straight segment have been severely damaged and cannot be used any longer.

[0061] The severe injury threshold and the minor injury standard are obtained according to the Railway Line Maintenance Rules and related standards, such as TB 2097-89 (Ministry of Railways Standard). TB 2097-89 is a ministerial standard issued by the Ministry of Railways of the People's Republic of China. Its full name is "Allowable Wear Limits of Rails". This standard stipulates the allowable limits of vertical wear, lateral wear and corrugated wear of rails. It is applicable to 38, 43, 50 and 60 kg / m domestic and non-domestic rails, including the wear standards of slightly damaged rails and severely damaged rails.

[0062] Step 202: If all wear values ​​of the straight line segment are not greater than the severe injury threshold, obtain the vertical wear value of each measuring point of the straight line segment. and side wear , calculate the total wear at each measuring point :

[0063]

[0064] Determine the vertical wear amount at each measuring point , Side wear and total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an early warning for measuring point replacement will be issued, indicating that the section of rail corresponding to the measuring point has been severely damaged and cannot be used any longer.

[0065] Step 203: Obtain the remaining rails in the straight line segment without any severely damaged measuring points, and obtain the vertical wear value of each measuring point. and side wear , calculate the wear change rate of each measuring point in each rail section and straight line wear change threshold :

[0066]

[0067] When the wear change rate of the measuring point in each rail section Exceeding the straight line wear change threshold When the rail is worn unevenly, the total wear The largest measuring point profile is the representative wear profile and the polishing target profile is designed.

[0068] When the wear change rate of the measuring point in each rail section Does not exceed the straight line wear change threshold When the rail is worn evenly, the average vertical wear and average side wear The formed profile is designed as the target profile for polishing, representing the wear profile.

[0069] When using, combine the contents in steps 201 to 203:

[0070] The average vertical wear through each straight line segment , average side wear and average total wear The relationship between the straight line segment and the severe injury threshold is used to determine whether the entire straight line segment should be directly replaced or repaired by grinding. If the straight line segment is repaired by grinding, the wear state of each rail section in the straight line segment is further analyzed to determine the representative wear profile of each rail section. This can accurately determine whether the degree of wear of the entire straight line segment has reached the standard for replacement. If the degree of wear of the entire straight line segment has not reached the standard for replacement, the representative wear profile of each rail section is further analyzed to determine. This helps to formulate a more refined maintenance plan and take different repair measures for rails with different degrees of wear.

[0071] Step 3: Measure the vertical wear at each measuring point in the curve segment , Side wear and total wear The relationship between the critical injury threshold and the critical injury threshold is used to determine whether the rail section corresponding to the measurement point should be directly replaced or repaired by grinding. If the rail section is repaired by grinding, the limit difference coefficient of the rail is calculated. , according to the limit difference coefficient of rail and curve segment limit difference threshold The representative wear profile of each rail section in the curve segment is determined based on the relationship between them.

[0072] The step three includes the following contents:

[0073] Step 301: Obtain the vertical wear amount of each measuring point of each curve segment and side wear , calculate the total wear at each measuring point :

[0074]

[0075] The superscript Q represents a curve segment.

[0076] Determine the vertical wear amount at each measuring point , Side wear and total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an early warning for measuring point replacement will be issued, indicating that the section of rail corresponding to the measuring point has been severely damaged and cannot be used any longer.

[0077] Step 302: Obtain the remaining rails in the curve section that do not have any severely damaged measuring points, and obtain the vertical wear value of each measuring point. and side wear , calculate the limit difference coefficient of each rail section in the curve section and the limit difference threshold :

[0078]

[0079] When the limit difference coefficient of rail Does not exceed the limit difference threshold When the maximum wear difference of this section of rail is small, the total wear amount The largest measuring point profile is the representative wear profile and the polishing target profile is designed.

[0080] Step 303: When the limit difference coefficient of the rail Exceeding the curve segment limit difference threshold When the rail wear is different, it means that the rail wear difference is large. The maximum measuring point and the corresponding rail section end profile are used as representative wear profiles to design the grinding target profile, and a smooth transition is used between the measuring point with the largest total wear and the corresponding section end point to achieve the grinding target profile design of the entire rail section.

[0081] When using, combine the contents in steps 301 to 303:

[0082] The vertical wear value at each measuring point in the curve segment , Side wear and total wear The relationship between the critical injury threshold and the critical injury threshold is used to determine whether the rail section corresponding to the measurement point should be directly replaced or repaired by grinding. If the rail section is repaired by grinding, the limit difference coefficient of the rail is calculated. , according to the limit difference coefficient of rail and curve segment limit difference threshold The relationship between the wear and tear of each rail section in the curved section can be determined, and a more targeted grinding strategy can be formulated for the curved section, which provides a reference for subsequent maintenance work and helps to achieve standardization and regularization of maintenance work.

[0083] Step 4: Determine the target grinding profile based on the initial rail head curve and representative wear profile data of the rail, compare and smoothly transition the target grinding profiles of the end points of each rail section, splice the complete target grinding profile data of the rail according to the sequence number, and output the grinding profile plan of the worn rail.

[0084] The step 4 includes the following contents:

[0085] Step 401, according to the design drawing of the rail, the initial rail head curve data of the rail is obtained, the initial rail head curve and the representative wear profile data are converted into the same coordinate system and aligned, all points of the initial rail head curve are moved downward according to the set translation amount, if the initial rail head curve after the movement does not completely fall into the representative wear rail profile, the translation operation is repeated, when all points on the initial rail head curve after the movement fall into the representative wear rail profile, it is considered that the convergence condition is met, the translation operation is stopped, and the closed figure formed by the initial rail head curve and the lower half of the representative wear profile is used as the grinding target profile of the representative wear profile.

[0086] Step 402: Obtain the grinding target profile of each rail section end point, compare it with the grinding target profile of the adjacent rail section end points, set a 1m buffer zone for the rail section end point with a large profile area, and smoothly transition from the adjacent grinding target profile to the grinding target profile of this rail.

[0087] Step 403: Obtain the complete grinding target profiles of all rails, splice the complete grinding target profile data of the rails according to the sequence number, and output the grinding profile plan of the worn rails.

[0088] When using, combine the contents in steps 401 and 403:

[0089] The target grinding profile is determined based on the initial rail head curve and representative wear profile data of the rail, and the target grinding profiles of the end points of each rail section are compared and smoothly transitioned. After the complete target grinding profile data of the rail are spliced ​​according to the sequential numbering, the grinding profile plan of the worn rail is output. This can more accurately determine the profile shape that needs to be restored for each rail section, while also taking into account the impact of the splicing between rails on the smoothness of train operation, avoiding over-grinding or under-grinding, and reducing the risk of safety accidents such as train derailment due to poor rail profile.

[0090] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. A person of ordinary skill in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0091] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0092] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A method for quickly designing a target profile for grinding a worn rail, characterized in that: The steps include: Measure the vertical wear and side wear of each part of the worn rail, and number the measurement points of the worn rail in sequence according to the measurement time sequence, calculate the slope K1 of each measurement point with the previous measurement point with the previous sequence number and the slope K2 of the next measurement point with the next sequence number, divide the measurement points into straight line segment points or curve segment points according to the relationship between K1 and K2, traverse the entire point set, mark the starting point and ending point of the straight line segment and the curve segment, and divide the worn rail into straight line segment and curve segment; The average vertical wear through each straight line segment , average side wear and average total wear The relationship between the wear state of each rail section in the straight line segment and the severe damage threshold is used to determine whether the entire straight line segment should be directly replaced or repaired by grinding. If the straight line segment is repaired by grinding, the wear state of each rail section in the straight line segment is further analyzed to determine the representative wear profile of each rail section. The vertical wear value at each measuring point in the curve segment , side wear and total wear The relationship between the critical injury threshold and the critical injury threshold is used to determine whether the rail section corresponding to the measurement point should be directly replaced or repaired by grinding. If the rail section is repaired by grinding, the limit difference coefficient of the rail is calculated. , according to the limit difference coefficient of rail and curve segment limit difference threshold The representative wear profile of each rail section in the curve section is determined by the relationship between The target grinding profile is determined based on the initial rail head curve and representative wear profile data of the rail, and the target grinding profiles of the end points of each rail section are compared and smoothly transitioned. After the complete target grinding profile data of the rail are spliced ​​according to the sequential numbering, the grinding profile plan of the worn rail is output.

2. A method for rapid design of target profile for grinding worn rails according to claim 1, characterized in that: Obtain the measurement time and position coordinates of the worn rail measurement points, number the worn rail measurement points in sequence according to the measurement time sequence, calculate the slope K1 of each measurement point with the previous sequence numbered measurement point and the slope K2 of the next sequence numbered measurement point, if , then the measurement point is divided into a straight line segment point, if , then the measurement point is divided into curve segment points, the entire point set is traversed, the start and end points of the straight segment and the curve segment are marked, and the worn rail is divided into straight segment and curve segment.

3. The method for rapid design of target profile for grinding worn rails according to claim 2, characterized in that: Obtain the vertical wear value at each measuring point of each straight line segment and side wear , and the average vertical wear of each measuring point in each straight line segment is obtained by statistics. and average side wear , calculate the average total wear of each straight line segment : in, i Indicates the sequential number of each section of worn rail, , j Indicates the sequential number of each section of spliced ​​rails in the same section of worn rails. , k Indicates the sequential numbering of the measuring points within the same section of the worn rail. , the superscript Z indicates a straight line segment; Determine the average vertical wear of each straight line segment , average side wear and average total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an alert for replacing the straight segment will be issued, indicating that all rails in the straight segment have been severely damaged and cannot be used any longer.

4. A method for rapid design of target profile for grinding worn rails according to claim 3, characterized in that: If the wear of all straight line segments is not greater than the severe injury threshold, obtain the vertical wear of each measuring point of the straight line segment and side wear , calculate the total wear at each measuring point : Determine the vertical wear amount at each measuring point , side wear and total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an early warning for measuring point replacement will be issued, indicating that the section of rail corresponding to the measuring point has been severely damaged and cannot be used any longer.

5. The method for rapid design of target profile for grinding worn rails according to claim 4, characterized in that: Obtain the remaining rails in the straight segment without severe damage measurement points, and obtain the vertical wear value of each measurement point and side wear , calculate the wear change rate of each measuring point in each rail section and straight line wear change threshold : When the wear change rate of the measuring point in each rail section Exceeding the straight line wear change threshold When the rail is worn unevenly, the total wear The largest measurement point profile is the target profile for designing the grinding profile to represent the wear profile; When the wear change rate of the measuring point in each rail section Does not exceed the straight line wear change threshold When the rail is worn evenly, the average vertical wear and average side wear The formed profile is designed as the target profile for polishing, representing the wear profile.

6. A method for rapid design of target profile for grinding worn rails according to claim 5, characterized in that: Obtain the vertical wear value of each measuring point in each curve segment and side wear , calculate the total wear at each measuring point : Among them, the superscript Q represents the curve segment; Determine the vertical wear amount at each measuring point , side wear and total wear Whether it is greater than the severe damage threshold. If any wear amount is greater than the severe damage threshold, an early warning for measuring point replacement will be issued, indicating that the section of rail corresponding to the measuring point has been severely damaged and cannot be used any longer.

7. A method for rapid design of target profile for grinding worn rails according to claim 6, characterized in that: Obtain the remaining rails in the curve section that do not have severe damage measurement points, and obtain the vertical wear value of each measurement point and side wear , calculate the limit difference coefficient of each rail section in the curve section and the limit difference threshold : When the limit difference coefficient of rail Does not exceed the limit difference threshold When the maximum wear difference of this section of rail is small, the total wear amount The largest measuring point profile is the representative wear profile and the polishing target profile is designed.

8. The method for rapid design of target profile for grinding worn rails according to claim 7, characterized in that: When the limit difference coefficient of rail Exceeding the curve segment limit difference threshold When the rail wear is different, it means that the rail wear difference is large. The maximum measuring point and the corresponding rail section end profile are used as representative wear profiles to design the grinding target profile, and a smooth transition is used between the measuring point with the largest total wear and the corresponding section end point to achieve the grinding target profile design of the entire rail section.

9. A method for rapid design of target profile for grinding worn rails according to claim 8, characterized in that: The initial rail head curve data of the rail is obtained according to the design drawing of the rail, the initial rail head curve and the representative wear profile data are converted into the same coordinate system and aligned, and all points of the initial rail head curve are moved downward according to the set translation amount. If the initial rail head curve after the movement does not completely fall into the representative wear rail profile, the translation operation is repeated. When all points on the initial rail head curve after the movement fall into the representative wear rail profile, it is considered that the convergence condition is met, the translation operation is stopped, and the closed figure formed by the initial rail head curve and the lower half of the representative wear profile is used as the grinding target profile of the representative wear profile.

10. A method for rapid design of target profile for grinding worn rails according to claim 9, characterized in that: The grinding target profile of each rail section end point is obtained and compared with the grinding target profile of the adjacent rail section end points. A 1m buffer zone is set for the rail section end point with a large profile area, and a smooth transition is made from the adjacent grinding target profile to the grinding target profile of this rail.

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