CN113322729A - Steel rail polishing method based on standard profile and grinding sequence - Google Patents
Steel rail polishing method based on standard profile and grinding sequence Download PDFInfo
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- CN113322729A CN113322729A CN202110662620.1A CN202110662620A CN113322729A CN 113322729 A CN113322729 A CN 113322729A CN 202110662620 A CN202110662620 A CN 202110662620A CN 113322729 A CN113322729 A CN 113322729A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
A rail grinding method based on standard profile and grinding sequence can accurately and effectively control a rail grinding vehicle to carry out grinding operation according to rail grinding parameters through acquired rail grinding parameters, effectively overcomes the dependence of the grinding operation of the grinding vehicle on a profile measuring tool and profile grinding software in profile restoration in the prior art, and calculates the profile of a rail pitch angle after each grinding head is cut by using an iterative algorithm through the set rail grinding parameters comprising target profile data, effectively realizes the control of the grinding process and the grinding result, improves the quality of the grinding operation, and is favorable for popularization and application.
Description
Technical Field
The invention belongs to the technical field of rails, and particularly relates to a steel rail grinding method based on standard profile and grinding sequence.
Background
At present, urban rail transit at home and abroad is rapidly developed, and the rail grinding technology is widely applied to railways of various countries in the world due to the advantages of obviously prolonging the service life of the rail, improving the driving stability and the safety and the like. A rail grinding wagon is a main tool for grinding rails.
There are three types of prior art polishing methods: one method is that a grinding vehicle is provided with a plurality of grinding modes, each grinding mode comprises different grinding angles and grinding power, and can be used for pertinently grinding various rail (or turnout) defects of fatigue cracks, grinding fat edges, wave abrasion, side grinding, stripping, chipping and the like of a track, and the selection basis of the grinding scheme is artificially and subjectively selected according to vehicle-mounted detection data and expert experience; the second method is that parameters such as grinding angle and power, grinding vehicle operation speed and the like are artificially and subjectively set directly according to data detected on the vehicle and expert experience without using a grinding mode configured on the vehicle; the third method is to measure the profile before polishing by using a profile measuring tool and transmit the profile to profile polishing software, and the polishing software calculates the polishing angle, power, the operating speed of a polishing vehicle and other parameters.
However, in the course of implementing the present technical solution, the two prior art grinding methods have the following disadvantages: firstly, a grinding mode commonly used by a grinding vehicle only aims at surface defects of the steel rail, and the contour repair is less concerned; secondly, the two former grinding methods depend on expert experience too much, the grinding process and the grinding result are uncontrollable, no matter a grinding mode configured on a vehicle is used or grinding parameters are manually input, the detection result of the grinding vehicle is only used as a reference factor input by the expert experience, and the preparation process of the grinding strategy does not use detection data actually at all; third, the third method, while best controlling the grinding quality, requires the configuration of profile measurement tools and profile grinding software, and requires additional investment in profile measurement and calculation modes.
Disclosure of Invention
In order to overcome the above disadvantages of the prior art, the present invention provides a rail grinding method based on a standard profile and a grinding sequence, which overcomes the limitation that a profile measuring tool and profile grinding software must be configured, is specially used for efficiently repairing a rail profile mainly worn vertically, and aims to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a rail grinding method based on standard profile and grinding sequence comprises the following steps:
s1, detecting the actual condition of the steel rail to be repaired, obtaining the measured data of the steel rail, and confirming that the steel rail with the profile needing to be repaired mainly has vertical abrasion and a fat edge at the gauge angle;
s2, determining an arc profile area to be polished, wherein the arc profile area comprises a rail top profile and a rail gauge angle profile;
s3, determining rail grinding parameters according to the determined target profile data of the rail top profile, wherein the rail grinding parameters comprise the operation speed and the operation power of a grinding vehicle, the deflection angle of a grinding head and the grinding times;
s4, determining rail grinding parameters according to the determined target profile data of the track gauge angle profile, wherein the rail grinding parameters comprise the operation speed and the operation power of a grinding vehicle, the deflection angle of a grinding head and the grinding times;
and S5, controlling the grinding vehicle to carry out grinding operation according to the rail grinding parameters.
Preferably, in step S2, the top-track profiles are respectively an R300 arc profile and an R80 arc profile, and the gage angle profile is an R13 arc profile.
Preferably, in step S3, the grinding wagon uses a grinding width distribution grinding head with a standard profile and the like, and repeatedly grinds until the rail top defect is eliminated or the depth of preventive grinding is reached.
Preferably, in step S3, the grinding wheels of the grinding wagon are ten grinding wheels on one side, and the grinding angle adjustment interval is 0.5 °.
Preferably, in step S3, the grinding angles of the ten grinding heads are-9.5 °, -6 °, -2.5 °, 0 °, 1 °, 2 °, 3 °, 5.5 °, 9.5 °, and 13.5 °, respectively.
Preferably, in step S4, the grinding wheels of the grinding wagon are ten grinding wheels on one side, the grinding wagon performs grinding by using a method of edge fat repairing according to the gauge angle, and the grinding once removes the edge fat and repairs the rail gauge angle profile.
Preferably, in step S4, the grinding wagon grinds small angles and then large angles, and the grinding wagon grinds 10 grinding heads on one side at the same power.
Preferably, in step S4, the sanding amount and the profile of the pitch angle after grinding are calculated from the sanding angle of the first grinding head and the profile of the pitch angle before sanding, the sanding amount and the profile after grinding are calculated from the sanding angle of the second grinding head and the profile of the pitch angle after grinding of the first grinding head, the sanding amount and the profile of the pitch angle after grinding are calculated in turn for each grinding head, the operating speed and power of the grinding wagon are determined from the sanding area, and the sanding amount per unit time for each sanding head on the grinding wagon is determined from the sanding area, the operating speed and power.
Preferably, in step S4, the grinding angles of the ten grinding heads are 14 °, 17 °, 20 °, 23.5 °, 27.5 °, 32 °, 37 °, 43 °, 53 °, and 75 °, respectively.
Preferably, in step S5, the grinding head angle sequence: the grinding head with the smallest angle is the first grinding head in the advancing direction of the grinding vehicle, the subsequent grinding heads are sequentially arranged from small to large in angle, two grinding angle modes with opposite angle sequences are compiled, and the grinding head is suitable for the two advancing and retreating modes so as to be suitable for the two advancing and retreating grinding directions.
Compared with the prior art, the invention has the beneficial effects that:
according to the rail grinding method based on the standard profile and the grinding sequence, the rail grinding vehicle can be accurately and effectively controlled to carry out grinding operation according to the rail grinding parameters through the acquired rail grinding parameters, the dependence of the grinding operation of the rail grinding vehicle on a profile measuring tool and profile grinding software in profile restoration in the prior art is effectively overcome, the profile of a rail pitch angle after each grinding head cuts is calculated through the set rail grinding parameters comprising target profile data by using an iterative algorithm, the grinding process and the grinding result are effectively controlled, the quality of the grinding operation is improved, and the rail grinding method is beneficial to popularization and application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of the present invention;
Detailed Description
In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention are described in further detail below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, an embodiment of the present invention provides a rail grinding method based on a standard profile and a grinding sequence, including the following steps:
s1, detecting the actual condition of the steel rail to be repaired, obtaining the measured data of the steel rail, and confirming that the steel rail with the profile needing to be repaired mainly has vertical abrasion and a fat edge at the gauge angle;
s2, determining an arc profile area to be polished, wherein the arc profile area comprises a rail top profile and a rail gauge angle profile;
s3, determining rail grinding parameters according to the determined target profile data of the rail top profile, wherein the rail grinding parameters comprise the operation speed and the operation power of a grinding vehicle, the deflection angle of a grinding head and the grinding times;
s4, determining rail grinding parameters according to the determined target profile data of the track gauge angle profile, wherein the rail grinding parameters comprise the operation speed and the operation power of a grinding vehicle, the deflection angle of a grinding head and the grinding times;
and S5, controlling the grinding vehicle to carry out grinding operation according to the rail grinding parameters.
Preferably, in step S2, referring to the rail standard, the 60kg standard rail has a profile consisting of 3 kinds of circular arcs, the top profile is an R300 circular arc profile and an R80 circular arc profile, and the gage angle profile is an R13 circular arc profile.
Preferably, in step S3, the grinding wagon uses a grinding width distribution grinding head with a standard profile and the like, and repeatedly grinds until the rail top defect is eliminated or the depth of preventive grinding is reached.
Preferably, in step S3, the grinding wheels of the grinding wagon are ten grinding wheels on one side, and the grinding angle adjustment interval is 0.5 °.
Preferably, in step S3, the grinding angles of the ten grinding heads are-9.5 °, -6 °, -2.5 °, 0 °, 1 °, 2 °, 3 °, 5.5 °, 9.5 °, and 13.5 °, respectively.
Preferably, in step S4, the grinding wheels of the grinding wagon are ten grinding wheels on one side, the grinding wagon performs grinding by using a method of edge fat repairing according to the gauge angle, and the grinding once removes the edge fat and repairs the rail gauge angle profile. In the steel rail with serious vertical abrasion, the arc of the gauge angle position R13 of the steel rail often has obvious fat edge. In order to solve the problem of the flange at the common track gauge angle position, after the top of the steel rail is ground, the profile of the track gauge angle is an obtuse angle formed by the last ground angle of the rail top and the inner side face of the rail head. Neglecting the rail base slope, the rail inside surface angle and the rail head plastic deformation, taking the above rail top standard profile grinding mode as an example, the obtuse angle of 12.5 ° +90 ° -102.5 °, so the typical profile at the gauge angle before grinding is 102.5 ° obtuse angle, which needs to be repaired to be R13 circular arc.
Preferably, in step S4, the grinding wagon grinds small angles and then large angles, and the grinding wagon grinds 10 grinding heads on one side at the same power.
Specifically, the grinding stones of the grinding wagon are longitudinally distributed along the rail, and the running direction of the grinding wagon is combined. The rail grinding process is not the summation of the lateral projections of each grinding wheel, and is actually ground in the grinding wheel sequence: not only the set working parameters, but also the positions of the working parameters. The grinding wheels in the sequence act on the profile of the steel rail in sequence, and the processing object of the subsequent grinding wheels is the profile obtained by the previous grinding, so that the initial contact point is influenced by the previous grinding wheel and deviates from the theoretical initial contact point, and even if the grinding wheels have the same swing angle and grinding depth, if the positions of the grinding wheels in the sequence are different, the removed cross section area and the influence on the profile of the steel rail are changed. The effect of the offset initial contact position on the rail profile makes the action of each grinding wheel unique and important. In order to reduce the number of large-angle grinding heads, a mode of grinding small angles first and then grinding large angles is adopted.
Preferably, in step S4, the sanding amount and the profile of the pitch angle after grinding are calculated from the sanding angle of the first grinding head and the profile of the pitch angle before sanding, the sanding amount and the profile of the pitch angle after grinding are calculated from the sanding angle of the second grinding head and the profile of the pitch angle after grinding of the first grinding head, the sanding amount and the profile of the pitch angle after grinding are calculated in turn from the sanding angle of the second grinding head and the profile of the pitch angle after grinding, the operating speed and power of the grinding wagon are determined from the sanding area, and the sanding amount of each sanding head on the grinding wagon per unit time is determined from the sanding area, the operating speed and power.
The specific calculation method is as follows:
the grinding amount is a triangle, and the calculation method of the height is as follows:
H1＝SQRT(2*S1/(TAN(D1)-TAN(D0)))；
wherein S1 is the grinding sectional area, D1 is the first grinding head angle, D0 is the gauge angle profile angle before grinding; the base of the triangle can be calculated by the sanding area S1 and the height H1;
the grinding angle of the second grinding head and the ground profile of the first grinding head are adopted, so that the grinding amount and the ground profile of the second grinding head can be calculated. If the grinding angle is not covered by the first grinding head angle, the grinding amount can be calculated by adopting the formula.
Note that if the grinding angle covers the first grinding head angle, the grinding angle is calculated according to the profile of the first grinding head before grinding and the total grinding area of the two grinding heads. When the angle is not covered, the polishing amount is a triangle, and the algorithm is the same as the above. For example, the grinding amount of the first grinding head and the second grinding head is a triangle, and the height is calculated by the following method:
H2＝SQRT(2*(S2+S1)/(TAN(D2)-TAN(D0)))；
wherein S1 and S2 are sectional areas ground by the first grinding head and the second grinding head, D2 is the angle of the second grinding head, and D0 is the angle of the track gauge angle profile before grinding; the base of the triangle can be calculated by the sanding area (S2+ S1) and the height H2;
similarly, the grinding amount of each grinding head and the ground profile can be calculated.
Preferably, in step S4, the grinding angles of the ten grinding heads are 14 °, 17 °, 20 °, 23.5 °, 27.5 °, 32 °, 37 °, 43 °, 53 °, and 75 °, respectively.
Preferably, in step S5, the grinding head angle sequence: the grinding head with the smallest angle is the first grinding head in the advancing direction of the grinding vehicle, the subsequent grinding heads are sequentially arranged from small to large in angle, two grinding angle modes with opposite angle sequences are compiled, and the grinding head is suitable for the two advancing and retreating modes so as to be suitable for the two advancing and retreating grinding directions.
According to the rail grinding method based on the standard profile and the grinding sequence, the rail grinding vehicle can be accurately and effectively controlled to carry out grinding operation according to the rail grinding parameters through the acquired rail grinding parameters, the dependence of the grinding operation of the rail grinding vehicle on a profile measuring tool and profile grinding software in profile restoration in the prior art is effectively overcome, the profile of a rail pitch angle after each grinding head cuts is calculated through the set rail grinding parameters comprising target profile data by using an iterative algorithm, the grinding process and the grinding result are effectively controlled, the quality of the grinding operation is improved, and the rail grinding method is beneficial to popularization and application.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, configuration, and operation in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. A rail grinding method based on standard profile and grinding sequence is characterized by comprising the following steps:
s1, detecting the actual condition of the steel rail to be repaired, obtaining the measured data of the steel rail, and confirming that the steel rail with the profile needing to be repaired mainly has vertical abrasion and a fat edge at the gauge angle;
s2, determining an arc profile area to be polished, wherein the arc profile area comprises a rail top profile and a rail gauge angle profile;
s3, determining rail grinding parameters according to the determined target profile data of the rail top profile, wherein the rail grinding parameters comprise the operation speed and the operation power of a grinding vehicle, the deflection angle of a grinding head and the grinding times;
s4, determining rail grinding parameters according to the determined target profile data of the track gauge angle profile, wherein the rail grinding parameters comprise the operation speed and the operation power of a grinding vehicle, the deflection angle of a grinding head and the grinding times;
and S5, controlling the grinding vehicle to carry out grinding operation according to the rail grinding parameters.
2. A rail grinding method according to claim 1, wherein in step S2, the top profile is R300 arc profile and R80 arc profile, and the gage angle profile is R13 arc profile.
3. A rail grinding method according to claim 2 based on standard profile and grinding sequence, characterized in that in step S3, the grinding wagon is used with grinding width distribution grinding heads of standard profile, and the grinding is repeated until the rail top defect is eliminated or the depth of preventive grinding is reached.
4. A rail grinding method according to claim 3 based on standard profile and grinding sequence, wherein in step S3, the grinding carriage has ten grinding heads on one side, and the grinding angle is adjusted at an interval of 0.5 °.
5. A rail grinding method according to claim 4 based on standard profile and grinding sequence, characterized in that in step S3, the grinding angles of said ten grinding heads are-9.5 °, -6 °, -2.5 °, 0 °, 1 °, 2 °, 3 °, 5.5 °, 9.5 ° and 13.5 °, respectively.
6. A rail grinding method according to claim 2 based on standard profile and grinding sequence, characterized in that in step S4, the grinding carriage has ten grinding heads on one side, and the grinding carriage carries out grinding by using the method of rail clearance angle fat edge restoration, and the one-pass grinding eliminates fat edges and restores the rail clearance angle profile.
7. A rail grinding method according to claim 6 based on standard profile and grinding sequence, characterized in that in step S4, the grinding carriage is used to grind small angles first and then large angles, and the grinding carriage is used to grind with equal power by 10 grinding heads on one side.
8. A rail grinding method according to claim 7 based on a standard profile and grinding sequence, wherein in step S4, the grinding amount and the profile of the grinding rear track angle are calculated based on the grinding angle of the first grinding head and the profile of the grinding front track angle, the grinding amount and the profile of the grinding rear track angle are calculated using the grinding angle of the second grinding head and the profile of the grinding rear track angle of the first grinding head, the grinding amount and the profile of the grinding rear track angle are calculated, the grinding amount and the profile of the grinding rear track angle of each grinding head are sequentially calculated, the operating speed and the power of the grinding carriage are determined based on the grinding area, and the grinding amount per unit time of each grinding head on the grinding carriage is determined based on the grinding area, the operating speed and the power.
9. A rail grinding method according to claim 8 based on a standard profile and grinding sequence, wherein the grinding angles of the ten grinding heads are 14 °, 17 °, 20 °, 23.5 °, 27.5 °, 32 °, 37 °, 43 °, 53 ° and 75 °, respectively, in step S4.
10. A rail grinding method based on a standard profile and grinding sequence as claimed in claim 1, wherein in step S5, the grinding head angle sequence: the grinding head with the smallest angle is the first grinding head in the advancing direction of the grinding vehicle, the subsequent grinding heads are sequentially arranged from small to large in angle, two grinding angle modes with opposite angle sequences are compiled, and the grinding head is suitable for the two advancing and retreating modes so as to be suitable for the two advancing and retreating grinding directions.
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| CN115239792A (en) * | 2022-09-20 | 2022-10-25 | 成都唐源电气股份有限公司 | Representative profile generation method for rail grinding |
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