JP3980899B2 - Rail correction plan support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support device capable of instructing an optimal correction plan when grinding a rail by a necessary amount, and is particularly suitably applied to a rail correction plan for a railway vehicle.
[0002]
[Prior art]
When a train passes on the rail, wear and damage will inevitably occur at the contact portion between the rail head and the vehicle theory. When this wear occurs in a wavy shape, the contact sound between the rail and the wheel changes in the section, which is recognized by the passengers. In addition, this wavy wear may occur frequently in the brake section, power running section, and sharp curve section of the train, and the degree of wear becomes deeper as the number of passing trains accumulates, causing noise and track misalignment. .
[0003]
On the other hand, even in the case of small unevenness and scratches, in a train passing at high speed, there are problems such as increased noise and prone to track misalignment. Is also possible.
[0004]
In the first place, if the rail of the railway vehicle is irregularly worn, the contact position between the rail and the wheel may be greatly deviated from the original position. In such a case, a derailment accident may be caused.
[0005]
For this reason, it is necessary to take measures against fatigue damage occurring on the surface of the rail top surface, and a method of smoothing the rail surface by scraping the fatigued portion of the rail and extending the rail life by removing the rail flaws is adopted. Has been. This repair work is called rail grinding, and a rail grinding wheel that performs this work while traveling is used by a rotating grindstone.
[0006]
By the way, for such rail correction, it is first necessary to accurately grasp the shape of the rail surface, and the applicant has previously proposed a cross-sectional shape measuring apparatus according to Japanese Patent No. 2000-150044. According to this device, it is possible to specify a place to be subjected to rail correction work by accurately grasping the rail cross-sectional shape.
[0007]
[Problems to be solved by the invention]
However, even if the installation location of the rail that is subject to rail correction is specified, whether or not it can be corrected to an optimal state depends only on empirical intuition, and there is a possibility that optimal grinding cannot be realized. there were. In addition, the correction work must be completed in a limited time (for example, 3 hours) after the last train has passed until the first generator car starts to run, and the correction work was interrupted at a halfway stage. Then, it may cause trouble.
[0008]
This invention is made in view of such a problem, and makes it a subject to provide the assistance apparatus which can devise the optimal cutting plan for implement | achieving the target shape line. It is another object of the present invention to provide a support device that can easily determine whether or not the correction work can be completed within a limited work time.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, a rail correction plan support apparatus according to the present invention includes a first database DB1 storing a rail deletion amount to be removed by a single correction operation by each grindstone, and a cutting database. Based on the data read from the second database, a second database DB2 storing the current surface shape of the rail to be the main object and a computer PC for realizing a simulation operation based on the data of the two databases are provided. Then, the cross-sectional shape of the current rail surface is shown, the specifying means (ST0) for specifying the target shape in relation to the shape, and referring to the first database based on the information on the grindstone to be used and the cutting position, And calculating means (ST4, ST5) for calculating the rail shape after one cutting operation.
[0010]
The rail correction plan support apparatus according to the present invention includes a database storing a current surface shape of a rail to be corrected, and a computer PC that realizes a simulation operation based on the data of the database. Provided, based on the data read from the database, the current rail surface cross-sectional shape, a specifying means (ST10) for specifying the target shape in relation to the shape, the current rail surface cross-sectional shape and the target shape The dividing means (ST11) for dividing the area in the closed curve formed by the above into a plurality of areas and calculating the area for each area, the area for each area, and once for each area specified in advance Based on the correction amount per hit, the number calculation means (ST12) for calculating the required number of corrections, and based on the calculation result of the number calculation means, the work is performed within the allowable time Determining appropriateness determination means whether it Ryo and a (ST13, ST14) and.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on examples. FIG. 1 is a schematic plan view of an example of a grinding vehicle EQ related to the present invention. A rail correction plan support device DET, which will be described later, simulates the amount of rail grinding (correction) of the correction vehicle EQ as shown in FIG. 1 and constructs an optimal correction plan.
[0012]
The grinding vehicle EQ in FIG. 1 is configured by connecting a power vehicle A having an engine compartment, a grinding vehicle B with a driver's cab, and a grinding vehicle C located in the center. The expurgation vehicle EQ is moved while grinding railway rails RL, in this example, 16 pieces of grinding stone GR ₁ ~GR ₁₆ to expurgation rail RL is located.
[0013]
As shown in the schematic side view (FIG. 2) cut along line II in FIG. 1, each grindstone GR is abutted against the left and right rails RL while being rotated by the drive motor M. θ is configured to be arbitrarily settable. Note that the contact angle θ means an angle formed by the tangent to the rail surface and the horizontal line LL (see FIG. 2).
[0014]
As described above, a total of 16 grindstones GR _{1 to} GR ₁₆ are installed in this grinding wheel EQ, but two grindstones adjacent to each other in the vehicle traveling direction have the same contact angle θ. Is set to. Therefore, in the trimming vehicle EQ of this embodiment, the maximum four different contact angles θ1 to θ4 are set, and the left and right rails RL and RL are trimmed from four directions, respectively.
[0015]
The amount of correction per rail RL varies depending on the type of grinding wheel, rail type, rail surface shape, grinding wheel correction pressure, etc., but the amount of correction for each rail RL depends on the type of grinding wheel. i and the correction pressure j are specified, and are databased for each type of rail. The individual correction tables TBL (i, j) constituting the database are theoretically simulated and experimentally verified.
[0016]
Hereinafter, a method for creating the correction table TBL (i, j) will be described. Originally, the surface of the rail is composed of a plurality of curved surfaces with different curvature radii smoothly and continuously, but the curvature radius of each part does not change as a whole, regardless of subtle wear differences on each part of the rail surface. Can be imitated. For example, the rail RL illustrated in FIG. 3 includes a first part R1 having a curvature radius of 13 mm, a second part R2 having a curvature radius of 80 mm, and a third part R3 having a curvature radius of 300 mm. Regardless of the situation, each part R1, R2, R3 can be simplified to always maintain the original radius of curvature.
[0017]
FIG. 4 is a graph representing the contents of a specific correction table TBL (i, j) created under such a premise. In each cutting table TBL (i, j), the contact width between the grinding wheel and the rail (the cutting width L in the tangential direction of the rail surface) is set on the horizontal axis for a portion to be corrected having a specific radius of curvature r. The vertical axis is a correction amount S that is cut by one correction with the correction pressure.
[0018]
As described above, the correction amount S shown in FIG. 4 is represented by the deleted area of the rail section to be cut (see FIG. 5). Taking the graph of FIG. 4 as an example, the rail surface having a curvature radius of 13 mm has an area of S0 (= about 0.5 mm ² ) when corrected with the contact width with the grindstone being L0 (= 0.2 mm). Deleted. When the same place is cut next, the contact width with the grindstone increases to L1 (see FIG. 5), but according to the experimental results, the cut cross-sectional area S gradually saturates and eventually FIG. As shown in FIG. 4, the cut cross-sectional area S is substantially constant regardless of the contact width.
[0019]
FIG. 6 is a block diagram illustrating a configuration of the grinding plan support apparatus DET according to the present embodiment. This support device DET performs a simulation operation based on the reference database DB1 having the correction table TBL as shown in FIG. 4, the actual measurement database DB2 storing the current surface shape of the rail, and the data in the databases DB1 and DB2. It is comprised with computer PC which implement | achieves.
[0020]
The surface shape of the railroad rail is actually measured prior to the grinding operation. Preferably, a “cross-sectional shape measuring device” disclosed in Japanese Patent Application No. 2000-15004 is used. According to this measuring apparatus, the surface shape of the rail can be accurately specified by the radial distance R from the origin and the angle Φ from the reference line (FIG. 3). In the actual measurement database DB2, the surface shape is specified by the music coordinates (R, Φ) or the orthogonal coordinates (X, Y).
[0021]
In order to make a correction plan, first, the rail to be corrected is read from the actual measurement database DB2 and displayed on the display device of the computer PC (ST0). Since the shape of the rail RL to be corrected is not similar to the original shape due to wear, next, a desired target shape is drawn (ST0).
[0022]
The above processing is artificially performed halfway, and thereafter is automatically performed according to the procedure of the flowchart of FIG. In the following description, for the sake of convenience, only one pair of grindstones will be used among the four pairs of left and right (8 each) shown in FIG.
[0023]
First, the deviation between the actual measurement line defined by the actual measurement database DB2 and the artificially defined target line is measured in the correction direction (advancing direction) of the grinding wheel, and the deviation becomes maximum. A position (corrected portion) is specified (ST1). This deviation is calculated by changing the cutting direction by a predetermined angle (for example, 5 °) for the actually measured shape on the rail.
[0024]
Next, the extracted maximum deviation δ is compared with the target deviation ε (ST2). If the maximum deviation δ <the target deviation ε is not satisfied, the type of grinding wheel and the grinding are determined based on the value of the maximum deviation δ and the grinding location. Identify the default value for pressure. For example, the types of grindstones used in the first part R1 and the third part R3 in FIG. 3 are different.
[0025]
Next, the reference database DB1 is searched using the specified grindstone and the correction pressure as keywords, and the corresponding reference table TBL is read (ST4). Next, based on the rail shape on the computer (current rail shape) and the cutting position determined in step ST1, a cutting width L (contact width between the grindstone and the rail) is specified, and the cutting width L Is used as a keyword to calculate the corrected area S from the reference table TBL. In accordance with this, the rail shape data is corrected by the corrected area S and displayed on the computer as necessary (ST5).
[0026]
Specifically, a cutting line parallel to the cutting width L is drawn, a closed curved surface formed by the cutting line and the original surface shape line is drawn, and the area surrounded by the closed curved surface is the cutting area S. Identify matching grinding lines. Note that the reference table TBL as shown in FIG. 4 is data obtained on the assumption that the true circle having the curvature radius r is corrected, and does not necessarily match the actual rail surface, but is calculated by the above procedure. It has been experimentally confirmed that the correct cutting line matches the actual correcting result.
[0027]
Once the cutting line that realizes the cutting area S can be calculated by the computer PC as described above, the calculated cutting line does not exceed the target rail surface (that is, excessive cutting). (ST6). Here, if it cuts too much, the cutting pressure is decreased by one step and the process returns to step ST5. Note that the type of grindstone is changed if excessive grinding occurs even if the grinding pressure is decreased by a predetermined level.
[0028]
Repeating the above process will eventually provide a cutting line that does not exceed the target rail surface. In that case, the cutting pressure, the type of grinding wheel, and the cutting position (cutting angle) at that time Is recorded in the plan table TBL2 (ST8). Further, according to the obtained cutting line, the surface shape data of the rail to be corrected is corrected and stored in the computer (ST8).
[0029]
Thereafter, the process after step ST1 is repeated for the rail surface shape after correction. When the processes of steps ST1 to ST8 are repeated in this way, the rail surface shape obtained by the simulation eventually coincides with the target rail shape (δ <ε), and the process ends when this condition is satisfied. . At this stage, since the correction plan has been established in the plan table TBL2, the result is output by printing processing or the like.
[0030]
By the way, in the above description, the position of the maximum deviation is extracted, and the correction process is started from that position. For example, the correction work is advanced from both ends of the rail toward the center, and only the final finishing stage is shown in FIG. You may take the procedure. In addition, as shown in FIG. 4, except for the corner portion with a particularly small radius of curvature, the cutting area cut by one cutting operation is the contact angle of the grindstone or the cutting of the rail surface. It is almost constant regardless of the position. In particular, after a number of cutting operations, the cutting area removed at a time including a corner portion having a small radius of curvature is constant.
[0031]
Therefore, in the simulation process of step ST5, the cutting area removed by one cutting work may be assumed to be a predetermined constant value determined by the cutting pressure. Except for the corner portion where the radius of curvature is small, it has been confirmed that the expected correction line obtained by such processing substantially coincides with the actual measurement line after the actual work. FIG. 8 is a diagram showing that the predicted correction line a obtained by the simulation and the actual measurement line b after the correction substantially coincide with each other.
[0032]
Subsequently, in the flowchart of FIG. 9, an embodiment for determining whether or not the correction work is possible when the rail distance, the target shape, and the correction work time to be corrected are given. This will be explained based on. According to this embodiment, for example, for a rail having a shape given by the solid line in FIG. 10, it is simply determined whether or not the work rail distance L (for example, 200 m) can be corrected to the target shape overnight. can do.
[0033]
As shown in FIG. 9, first, after specifying the target shape in relation to the current rail shape (ST10), the rail cross-section is divided into several regions according to the radius of curvature, The reduced cross-sectional area Si is calculated (ST11). For example, in the case of FIG. 10, it is divided into a region a having a small curvature and a region b having a large curvature, and the respective cut cross-sectional areas are calculated as Sa (mm ² ) and Sb (mm ² ).
[0034]
Subsequently, it is calculated how many correction operations are required to complete the correction of each area (ST12). The unit cutting amounts a1, a2,... Ai (cutting cross-sectional area mm ² ) that can be deleted by one cutting operation are experimentally specified in advance for each region. Based on the calculation of the unit correction amount (= Si / ai), the necessary number of operations Ni is calculated. In the actual cutting work, the cutting position is not accurately separated for each of the above-mentioned areas, but there is no problem in calculating the necessary number of work.
[0035]
Next, the maximum number of corrections Nmax is obtained for the number of corrections N1 and N2 calculated in the process of step ST12 (ST13). In this case, it is considered whether or not the correction work can be performed at the same time. However, in the case of FIG. 10, since the Sa part and the Sb part can be corrected simultaneously, the larger number of N1 and N2 is the maximum. The number of corrections Nmax. When the Sa portion and the Sb portion cannot be corrected simultaneously, N1 + N2 is the maximum number of corrections Nmax.
[0036]
Finally, based on the maximum number Nmax of corrections calculated in step ST13 and the working ability of the grinding car to be used, it is determined whether or not the target shape can be corrected within a given working time (ST14). Here, the working ability of the grinding car is the working speed of the grinding car (= the grinding distance D per unit time), and the actual time required for Nmax operations is L with respect to the working rail distance L. XNmax / D is specified. It should be noted that the determination is made in consideration of the specified real time in consideration of the time required for starting and ending work and other necessary margin time.
[0037]
As described above, in this embodiment, since it is possible to determine whether or not the target shape can be corrected in an overnight work (usually about 3 hours), it is possible to make a reliable work plan. If the target shape cannot be corrected, the distance of the rail to be corrected can be shortened and corrected to a work rail distance that can be corrected overnight, or the target shape can be recreated and corrected overnight. The target shape is corrected for convenience.
[0038]
【The invention's effect】
As described above, according to the present invention, it is possible to realize a support device that can formulate an optimum correction plan for realizing a target shape line.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an example of a grinding wheel related to the present invention.
2 is a schematic side view taken along line II in FIG. 1. FIG.
FIG. 3 is a view for explaining a surface shape of a rail.
FIG. 4 is a graph showing the contents of a reference table.
FIG. 5 is a drawing for explaining the relationship between the shape of the rail surface and the cut area to be cut off.
FIG. 6 is a block diagram of a support device according to the embodiment.
FIG. 7 is a flowchart for explaining the operation content of the apparatus of FIG. 6;
FIG. 8 shows a comparison between a simulation result and a shape after an actual cutting operation.
FIG. 9 is a flowchart illustrating a second embodiment.
FIG. 10 is a diagram illustrating a second embodiment.
[Explanation of symbols]
RL rail DB1 first database (reference database)
DB2 Second database (actual measurement database)
PC computer ST0 first means ST4, ST5 second means ST5 third means

Claims (5)

A first database (DB1) that stores the deleted amount of rails to be removed by a single correction operation by each grindstone, and a second database that stores the current surface shape of the rail to be corrected ( DB2) and a computer (PC) that realizes a simulation operation based on the data of both databases, and shows the current cross-sectional shape of the rail surface based on the data read from the second database, Referring to the specifying means (ST0) for specifying a target shape in which the radius of curvature of each part is set to be the same as the initial shape of the rail , the first database and the second database, The current surface shape of the rail to be corrected stored in the database is subjected to a single correction operation stored in the first database. Obtained by removing partial modification of the rail to be removed, once the cutting calculating means for calculating a positive working after the rail shape (ST4, ST5) and support apparatus of the rail cutting positive plan, characterized in that it comprises a. A storage means (ST8) is further provided for storing data for correcting the cross-sectional shape of the rail surface based on the calculation result of the calculating means, and for specifying the cross-sectional shape of the rail surface after the correction,
The support device according to claim 1, wherein the operation of the calculating means (ST4, ST5) is executed again based on the cross-sectional shape of the rail surface after the correction. Further comprising comparison means (ST1, ST2) for comparing the rail state calculated by the calculation means with the target shape specified by the specification means (ST0),
The support device according to claim 2, wherein the operation is finished when the difference between the two is below a predetermined value. A determination means (ST6) for determining the suitability of the calculation result by the calculation means is further provided, so that the grinding wheel information and the correction position information in execution of the calculation means are stored unless the target shape is corrected. The support device according to any one of claims 1 to 3. A database that stores the current surface shape of the rail to be corrected and a computer (PC) that realizes a simulation operation based on the data of the database are provided, and based on the data read from the database, Showing the cross-sectional shape of the rail surface, and specifying means (ST10) for specifying a target shape in which the radius of curvature of each part is set to be the same as the initial shape of the rail in relation to the shape, and the cross-sectional shape of the current rail surface The area within the closed curve formed by the target shape and the target shape is divided into a plurality of regions, the dividing means (ST11) for calculating the area for each region, the area for each region, and each region specified in advance based on the expurgation per single, calculate the expurgation times as necessary in the respective regions, the number of times calculation means for calculating the inner, maximum cutting positive number (ST12) , Based on the calculation result of the frequency calculation unit, permissible determines appropriateness determination means whether it can complete the work in time (ST13, ST14) and support apparatus of the rail cutting positive plan, characterized in that it comprises a.

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