Method for planing a rail profile defect

Abstract

The application relates to a method for repairing rail profile defects by planing. The method comprises the following steps: determining a standard rail profile for repairing a rail profile according to the rail profile type, the rail profile defect position and the rail profile defect depth; calculating initial planing speed and initial planing depth for repairing the rail profile defect, and performing rail profile defect repairing planing according to the initial planing parameters; and checking the planing repairing effect of the rail profile defect, and performing rail profile defect planing repairing according to the rail profile defect repairing effect. According to the scheme, the optimal planing parameters for repairing the rail profile defect can be analyzed and calculated according to the rail profile information, and the planing parameters can be optimized for multiple times, so that the rail profile defect can be repaired by planing without residual wave marks, and the service life of the transport rail is prolonged.

Description

Technical Field

[0001] This application relates to the field of rail transport maintenance technology, and in particular to a method for planing and repairing track profile defects. Background Technology

[0002] Rail transportation plays a vital role in my country's national economy. By the end of 2022, my country's total rail mileage exceeded 160,000 kilometers. With increasing transport volume and speed, track defects caused by damage are becoming increasingly prominent. The two most common methods for repairing track defects are grinding and milling. These methods remove the surface layer of the defective area to bring the actual track shape closer to the standard track shape, ensuring smooth train operation and reducing wheel-rail wear.

[0003] A diagram illustrating the grinding and repair of track profile defects is shown below. Figure 4 As shown, grinding is performed by adjusting the movement of a rotating grinding wheel on the rail profile surface. The peaks formed by rail wear are ground down by a larger amount, while the troughs are ground down by a relatively smaller amount, thus reducing the height difference at the rail profile defect. However, this method only weakens the rail profile defect. A schematic diagram of milling repair for rail profile defects is shown below. Figure 5 As shown, a milling disc with a milling cutter mounted on its circumference rotates and cuts the rail profile during movement, thereby repairing rail profile defects. However, residual ripples are left on the rail profile surface after milling, affecting the accuracy of rail profile defect repair.

[0004] For the reasons mentioned above, existing track profile defect repair technologies have obvious shortcomings, resulting in limited accuracy in track profile defect repair. No matter how they are improved, existing technologies cannot fundamentally overcome these shortcomings, thus limiting their application. Summary of the Invention

[0005] To address or partially address the problems existing in related technologies, this application provides a method for planing and repairing track profile defects. This method can analyze and calculate the optimal planing parameters for track profile defect repair based on the type of track profile, the location of the defect, and the depth of the defect. It can also perform multiple optimizations of the planing parameters to achieve track profile defect repair without residual ripple marks, thereby improving train running stability, reducing track profile wear rate, and increasing the service life of the transport track.

[0006] The first aspect of this application provides a method for planing and repairing track profile defects, comprising:

[0007] The standard track profile for repair is determined based on the type of track profile, the location of track profile defects, and the depth of track profile defects.

[0008] Calculate the initial planing speed and initial planing depth for track profile defect repair, and perform track profile defect repair planing based on the initial planing parameters;

[0009] Inspect the effectiveness of planing repair for track profile defects, and perform planing repair for track profile defects based on the effectiveness of the repair.

[0010] Optionally, based on the effect of the track profile defect repair, track profile defect planing repair may be performed, including:

[0011] Compare the shape deviation between the actual track profile after planing and the standard track profile, correct the track profile planing parameters, and then conduct two or more tests.

[0012] Record the planing parameters whose maximum deviation value of the track profile is less than the standard allowable range, and select the planing parameters of the track profile defect that are closest to the track profile defect to be repaired as the default parameters.

[0013] Perform planing repair on the track profile defects to be repaired based on the default parameters.

[0014] Optionally, the planing parameters are corrected by comparing the shape deviation between the actual planed profile and the standard profile, including:

[0015] If the maximum deviation of the profile is greater than or equal to the standard allowable range, it is determined that the initial planing parameters have too small a planing amount, and the planing speed and planing depth are reduced in turn.

[0016] If the maximum deviation value is greater than or equal to the standard allowable range but less than the standard allowable value, it is determined that the initial planing speed is too fast, and the planing speed is reduced sequentially while the planing depth remains unchanged.

[0017] If the maximum deviation is less than the standard allowable range, the initial planing parameters are considered appropriate.

[0018] Optionally, perform two or more tests, including:

[0019] Find a track profile that is similar to the initial track profile and track profile defects and conduct a second test. Perform at least two or more track profile planing tests until the maximum deviation value of two or more test track profiles after planing is less than the standard allowable range.

[0020] Optionally, comparing the shape deviation between the actual profile after planing and the standard profile also includes:

[0021] When analyzing track profile defects, the actual measured track profile and the standard track profile are placed in the same coordinate system with the same origin.

[0022] Optional maximum deviation values ​​include:

[0023] The maximum permissible deviation in shape between the actual track profile and the standard track profile is ±0.2 mm (standard value).

[0024] The standard allowable range is ±0.1 mm between the actual rail profile and the standard rail profile.

[0025] The standard value is the standard data value of the shape of the standard rail profile.

[0026] Optionally, the initial planing speed and initial planing depth for repairing the profile defect are calculated, including:

[0027] The maximum planing speed of the tool is determined by the material used for the planing tool, and the initial planing speed is calculated based on the speed safety factor of the planing profile and the maximum planing speed.

[0028] The initial planing depth is calculated based on the maximum depth of the track profile defect and the planing depth required to correct the track profile shape. The planing depth should be less than the target planing amount.

[0029] Optionally, the formula for calculating the initial planing speed is as follows:

[0030]

[0031] In equation (1), v p To adjust the planing speed for repairing track profile defects, The maximum planing speed of the tool is given by n, k0 is the speed correction coefficient for the planing profile, and n is the maximum planing speed of the tool. s The speed safety factor for planing the profile.

[0032] Optionally, the formula for calculating the initial planing depth is as follows:

[0033]

[0034] In the formula, h p To repair the profile defects, the planing depth, k C This is the planing depth coefficient. Δh represents the maximum depth of the surface defect in the track profile. RD The required planing depth to correct the profile shape.

[0035] The technical solution provided in this application may include the following beneficial effects:

[0036] Based on the type of track profile, the location of track profile defects, and the depth of track profile defects, this application analyzes and calculates the optimal planing parameters for track profile defect repair, and performs multiple optimizations of the planing parameters to achieve track profile defect repair without residual ripple marks, thereby improving train running stability, reducing track profile wear rate, and increasing the service life of transport tracks.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0038] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0039] Figure 1 This is a schematic flowchart illustrating a method for planing and repairing track profile defects according to an embodiment of this application;

[0040] Figure 2 This is another schematic flowchart illustrating the method for planing and repairing track profile defects as shown in the embodiments of this application;

[0041] Figure 3 This is a planing schematic diagram illustrating the planing method for repairing track profile defects as shown in the embodiments of this application;

[0042] Figure 4 This is a schematic diagram of grinding and repairing defects in the rail profile;

[0043] Figure 5 This is a schematic diagram of milling repair for track profile defects. Detailed Implementation

[0044] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0045] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] To address the aforementioned issues, this application provides a method for planing and repairing track profile defects. This method analyzes and calculates the optimal planing parameters for track profile defect repair based on the type of track profile, the location of the defect, and the depth of the defect. It also performs multiple optimizations of the planing parameters to achieve track profile defect repair without residual ripple marks, thereby improving train running stability, reducing track profile wear rate, and extending the service life of the transport track.

[0049] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0050] Example 1:

[0051] Figure 1 This is a schematic flowchart illustrating a method for planing and repairing track profile defects according to an embodiment of this application.

[0052] See Figure 1 A method for planing and repairing track profile defects, comprising:

[0053] S101. Determine the standard track profile for repair based on the type of track profile, the location of track profile defects, and the depth of track profile defects.

[0054] First, the repaired profile is selected based on the type of track profile. The location of track profile defects is recorded for selecting similar test profiles. The depth and size of the defects are analyzed to determine the target planing amount required to eliminate them. Taking into account the repaired profile, the location of the defects, and the target planing amount, the standard track profile and its standard value are determined. The standard profile value is the standard data value for the shape of the standard track profile.

[0055] S102. Calculate the initial planing speed and initial planing depth for track profile defect repair, and perform track profile defect repair planing according to the initial planing parameters.

[0056] In step S102, the initial planing speed for repairing the profile defect is calculated. The maximum planing speed of the tool is determined by the material used in the planing tool, and the initial planing speed is calculated based on the speed safety factor for planing the profile and the maximum planing speed. The formula for calculating the initial planing speed is as follows:

[0057]

[0058] In equation (1), v p To adjust the planing speed for repairing track profile defects, The maximum planing speed of the tool is given by n, k0 is the speed correction coefficient for the planing profile, and n is the maximum planing speed of the tool. s The speed safety factor for planing the profile.

[0059] The speed ranges from 10 to 60 m / s, depending on the material of the cutting tool; k0 ranges from 0 to 1, determined by the cutting thickness, typically between 0.4 and 1.0, with 0.4 for the maximum cutting thickness and 1.0 for the minimum; n s The value ranges from 1 to 2. When the cutting thickness is at its maximum, the value is 2.0, and it decreases sequentially. When the cutting thickness is at its minimum, the value is 1.0. The value affects the tool life.

[0060] Optionally, the initial planing depth is calculated based on the maximum depth of the profile defect and the planing depth required to correct the profile shape. The formula for calculating the initial planing depth is as follows:

[0061]

[0062] In the formula, h p To repair the profile defects, the planing depth, k C This is the planing depth coefficient. Δh represents the maximum depth of the surface defect in the track profile. RD The required planing depth to correct the profile shape.

[0063] k C The value ranges from 0 to 1, and the magnitude of the value affects the defect repair effect. The defect repair effect is directly proportional to the value. When the value is 0, the defect repair effect is the worst, and when the value is 1, the defect repair is the best. Determined by actual track profile defects; Δh RD The correction effect on the track profile shape is 0-0.2mm and Δh. RD The values ​​are directly proportional; when the value is 0, there is no correction to the track profile shape; when the value is 0.2 mm, the correction effect on the track profile shape is the best.

[0064] S103. Inspect the effect of planing and repairing track profile defects, and perform planing and repair of track profile defects based on the effect of track profile defect repair.

[0065] Specifically, optional repairs include planing to repair track profile defects based on the repair effect, including:

[0066] Compare the shape deviations of the actual track profile after planing with those of the standard track profile, correct the track profile planing parameters, and then perform two or more tests. Record the planing parameters whose maximum deviation value of the track profile is less than the standard allowable range, and select the track profile defect planing parameters that are closest to the track profile defect to be repaired as the default parameters.

[0067] Optionally, compare the shape deviation between the actual profile after planing and the standard profile, and perform parameter corrections, including:

[0068] If the maximum deviation of the profile exceeds the standard allowable range, it is considered that the initial planing parameters have too small a planing amount, and the planing speed and planing depth are reduced in turn.

[0069] If the maximum deviation exceeds the standard allowable range but is less than the standard allowable value, the initial planing speed is considered to be too fast, and the planing speed is reduced sequentially while the planing depth remains unchanged.

[0070] If the maximum deviation is less than the standard allowable range, the initial planing parameters are considered appropriate.

[0071] Optionally, perform two or more tests, including:

[0072] Find a track profile that is similar to the initial track profile and track profile defects, and conduct a second test. Perform track profile planing at least twice or more until the maximum deviation value of the track profile is less than the standard allowable range.

[0073] Optionally, comparing the shape deviation between the actual profile after planing and the standard profile also includes:

[0074] When analyzing track profile defects, the actual measured track profile and the standard track profile are placed in the same coordinate system with the same origin.

[0075] Optional maximum profile deviation values ​​include:

[0076] The maximum allowable deviation of the actual track profile from the standard track profile is ±0.2 mm of the standard value, and the standard allowable range is ±0.1 mm of the standard value, which is 50% of the standard value.

[0077] Example 2:

[0078] Figure 2 This is another schematic diagram of the method for planing and repairing track profile defects shown in the embodiments of this application.

[0079] See Figure 2 Another embodiment of the method for planing and repairing profile defects provided in this application includes:

[0080] S201. Determine the standard track profile for repairing track defects based on the type of track profile, the location of track defects, and the depth of track defects.

[0081] First, the repaired profile is selected based on the type of track profile. The location of track profile defects is recorded for selecting similar test profiles. The depth and size of the defects are analyzed to determine the target planing amount required to eliminate them. Taking into account the repaired profile, the location of the defects, and the target planing amount, the standard track profile and its standard value are determined. The standard profile value is the standard data value for the shape of the standard track profile.

[0082] S202. Perform profile defect repair planing based on default planing parameters.

[0083] The default planing parameters for repairing profile defects are a planing speed of 10 m / s and a planing depth of 0.5 mm.

[0084] like Figure 3 As shown, the default operating parameters of the planing device are set to the aforementioned planing parameters. The planing cutter is controlled to descend to the planing entry point and run at the calculated planing speed. The planing operation is repeated until the calculated planing thickness is achieved. The shape of the track profile after planing is measured, and the degree of track profile defect elimination is analyzed. The actual measured track profile and the standard track profile are placed at the same origin position in the same coordinate system.

[0085] S203. Judge the effect of planing repair on track profile defects and correct the planing parameters.

[0086] Compare the shape deviation between the actual profile after planing and the standard profile. If the maximum deviation exceeds the standard allowable value, it is considered that the default planing parameters have insufficient planing amount. In this case, the planing speed is reduced and the planing depth is increased.

[0087] If the maximum deviation exceeds 50% of the standard allowable value but is less than the standard allowable value, it is considered that the default planing parameters have an excessively fast planing speed. The planing speed is then reduced sequentially while the planing depth remains unchanged.

[0088] If the maximum deviation is less than 50% of the standard allowable value, the default planing parameters are considered appropriate.

[0089] The maximum allowable deviation of the actual track profile from the standard track profile is ±0.2mm, and 50% of the standard allowable value is ±0.1mm.

[0090] S204. Find tracks with similar track profiles and defects, and then conduct multiple tests.

[0091] Using the planing parameters corrected in step S203, plan similar tracks and compare the shape deviation of the actual track profile after planing with the standard track profile until the maximum deviation of the track profile after two or more planing operations is less than 50% of the standard allowable value.

[0092] S205. Select the qualified planing parameters of the track profile defect that are closest to the one to be repaired as the default parameters, and perform track profile defect repair.

[0093] After recording the maximum deviation of the track profile as less than 50% of the standard allowable value, the planing parameters are set. If the track profile defect of the experimental track profile with a maximum deviation value less than 50% of the standard allowable value is most similar to the track profile defect of this test, then the parameters of this track profile defect repair are selected as the default planing parameters.

[0094] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for planing and repairing track profile defects, characterized in that, include: The standard track profile for repair is determined based on the type of track profile, the location of track profile defects, and the depth of track profile defects. Calculate the initial planing speed and initial planing depth for repairing track profile defects, and perform track profile defect repair planing based on the initial planing parameters; wherein, calculating the initial planing speed and initial planing depth for repairing track profile defects includes: determining the maximum planing speed of the tool based on the material used for the planing tool, calculating the initial planing speed based on the speed safety factor for planing the track profile and the maximum planing speed; and calculating the initial planing depth based on the maximum depth of the track profile defect and the planing depth required to correct the track profile shape. Inspect the effectiveness of planing repair for track profile defects, and perform planing repair on the defects to be repaired based on the repair effect, including the following steps: By comparing the shape deviation of the actual profile after planing with that of the standard profile, the planing parameters are corrected. The maximum allowable shape deviation between the actual profile and the standard profile is ±0.2 mm, and the standard allowable range is ±0.1 mm. The standard value is the standard shape data value of the standard profile. If the maximum deviation is greater than or equal to the standard allowable range, the initial planing parameters are considered to have insufficient planing depth, and the planing speed is decreased and the planing depth is increased sequentially. If the maximum deviation is greater than or equal to the standard allowable range but less than the standard allowable value, the initial planing speed is considered to be too fast, and the planing speed is decreased sequentially while the planing depth remains unchanged. If the maximum deviation is less than the standard allowable range, the initial planing parameters are considered appropriate. After the planing parameters are corrected, two or more tests are performed. Record the planing parameters whose maximum deviation value of the track profile is less than the standard allowable range, and select the planing parameters of the track profile defect that are closest to the track profile defect to be repaired as the default parameters. Perform planing repair on the track profile defects to be repaired based on the default parameters.

2. The method according to claim 1, characterized in that, The requirement to perform two or more tests includes: Find a track profile that is similar to the initial track profile and track profile defects and conduct a second test. Perform at least two or more track profile planing tests until the maximum deviation value of two or more test track profiles after planing is less than the standard allowable range.

3. The method according to claim 1, characterized in that, The comparison of the shape deviation between the actual profile after planing and the standard profile also includes: When analyzing track profile defects, the actual measured track profile and the standard track profile are placed in the same coordinate system with the same origin.

4. The method according to claim 1, characterized in that, The formula for calculating the initial planing speed is as follows: （1） In equation (1), To adjust the planing speed for repairing track profile defects, The maximum planing speed of the tool. This is the speed correction factor for planing the profile. The speed safety factor for planing the profile.

5. The method according to claim 1, characterized in that, The formula for calculating the initial planing depth is as follows: （2） In the formula, To repair the profile defects, the planing depth, This is the planing depth coefficient. This represents the maximum depth of the defect on the track profile surface. The required planing depth to correct the profile shape.

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