CN113136750A - Steel rail cambered surface polishing method - Google Patents
Steel rail cambered surface polishing method Download PDFInfo
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- CN113136750A CN113136750A CN202110453578.2A CN202110453578A CN113136750A CN 113136750 A CN113136750 A CN 113136750A CN 202110453578 A CN202110453578 A CN 202110453578A CN 113136750 A CN113136750 A CN 113136750A
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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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- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a steel rail cambered surface polishing method, which comprises the following steps: the rail grinding trolley is characterized in that a plurality of rail grinding units are longitudinally arranged on a frame of the rail grinding trolley, when the rail is ground, the rail grinding units are adjusted to a set transverse position and an inclination angle, and grinding wheels are pressed downwards and are ground on rail heads of the rails through the outer circumferences of the rail grinding units. The working surface of the grinding wheel of each steel rail grinding unit corresponds to a section of arc surface of the cross section of the steel rail head, and the enveloping of the whole grinding section of the steel rail head on one side is realized through the combination of the grinding wheels. The invention can solve the technical problems that the prior steel rail polishing method can not polish the profile surface of the steel rail sufficiently, can not pass through a turnout area normally and has limited polishing deflection angle.
Description
Technical Field
The invention relates to the technical field of rail engineering machinery, in particular to a method for polishing a steel rail cambered surface.
Background
The grinding trolley is an actuating mechanism for grinding operation, is a key component of a steel rail grinding train, and has important position and function on the grinding train. Meanwhile, the grinding action, quality, efficiency, the advancement of the grinding process and the like required by the grinding train are finally embodied by the grinding trolley. The most central part of the grinding trolley is the grinding unit, and the grinding unit directly acts on the steel rail to realize grinding operation, so that the mechanism design, the reasonability and the action accuracy of the grinding unit are very important.
At present, most of domestic rail grinding mills grind a rail 23 fixed on a sleeper 24 by using a grinding stone plane, as shown in figure 1. In the method, the grinding motor 10 drives the grinding wheel 9 to rotate to grind the rail surface of the steel 23, but the grinding mode is easy to cause insufficient grinding of the profile surface and the profile surface has a plurality of continuous small tangent planes. In addition, the wave wear damage cannot be removed, and the surface roughness of the rail after grinding is large, generally 10 micrometers or less. In particular, in the vicinity of facilities such as turnout areas, for example, guard rails, greasers and the like, the diameter ratio of the grinding wheel disk is large, generally about 260mm, and the grinding wheel also needs to perform a deflection action, so that the grinding stone is easy to touch obstacles on two sides of the rail during grinding. Therefore, before grinding, the equipment on two sides of the steel rail is frequently required to be removed, the operation difficulty is high, and the time is very long.
Disclosure of Invention
In view of the above, the invention aims to provide a rail cambered surface grinding method to solve the technical problems that the conventional rail grinding method cannot fully grind a rail profile surface, cannot normally pass through a turnout area and has a limited grinding deflection angle.
In order to achieve the above object, the present invention specifically provides a technical implementation scheme of a rail arc surface polishing method, which comprises the following steps:
the rail grinding trolley is characterized in that a plurality of rail grinding units are longitudinally arranged on a frame of the rail grinding trolley, when the rail is ground, the rail grinding units are adjusted to a set transverse position and a set inclination angle, and the grinding wheel is pressed down and is used for grinding a rail head of the rail through the outer circumference surface of the grinding wheel. The working surface of the grinding wheel of each steel rail grinding unit corresponds to one section of arc surface of the cross section of the steel rail head, and the enveloping of the whole grinding section of the steel rail head on one side is realized through the combination of the grinding wheels.
Furthermore, at least 5 rail grinding units are installed on one side of the vehicle frame, and the working surfaces of grinding wheels of the rail grinding units respectively correspond to arc surfaces for grinding the middle part R300, the two sides R80 of the middle part and the outermost side R13 of the rail head.
Furthermore, a first polishing unit, a second polishing unit, a third polishing unit, a fourth polishing unit and a fifth polishing unit are sequentially arranged on one side of the frame along the longitudinal direction. And processing an arc surface of R13 on the outer circumferential surface of the grinding wheel of the first grinding unit, and grinding the arc surface of the R13 on the outer side of the rail head of the steel rail. And processing an arc surface of R80 on the outer circumferential surface of the grinding wheel of the second grinding unit, and grinding the arc surface of the R80 on the outer side of the rail head of the steel rail. And processing an R300 arc surface on the outer circumferential surface of the grinding wheel of the third grinding unit, and grinding the R300 arc surface in the middle of the rail head of the steel rail. And processing an arc surface of R80 on the outer circumferential surface of the grinding wheel of the fourth grinding unit, and grinding the arc surface of the inner side R80 of the rail head of the steel rail. And processing an arc surface of R13 on the outer circumferential surface of the grinding wheel of the fifth grinding unit, and grinding the arc surface of the inner side R13 of the rail head of the steel rail.
Furthermore, a first polishing unit, a second polishing unit, a third polishing unit, a fourth polishing unit and a fifth polishing unit are sequentially arranged on one side of the frame along the longitudinal direction. And processing an arc surface of R13 on the outer circumferential surface of the grinding wheel of the first grinding unit, and grinding the arc surface of the inner side R13 of the rail head of the steel rail. And processing an arc surface of R80 on the outer circumferential surface of the grinding wheel of the second grinding unit, and grinding the arc surface of the inner side R80 of the rail head of the steel rail. And processing an R300 arc surface on the outer circumferential surface of the grinding wheel of the third grinding unit, and grinding the R300 arc surface in the middle of the rail head of the steel rail. And processing an arc surface of R80 on the outer circumferential surface of the grinding wheel of the fourth grinding unit, and grinding the arc surface of the R80 on the outer side of the rail head of the steel rail. And processing an arc surface of R13 on the outer circumferential surface of the grinding wheel of the fifth grinding unit, and grinding the arc surface of the R13 on the outer side of the rail head of the steel rail.
Further, arc surfaces of R300, R80 and R13 are respectively processed on the outer circumferential surface of the grinding wheel in advance, and then matched grinding is carried out on the arc surfaces and the arc surface of the rail head of the steel rail.
Furthermore, the outer circumferential surface of the grinding wheel is not processed in advance, and the grinding wheel automatically generates a corresponding arc surface according to the arc surface of the steel rail grinding position in the grinding operation process by utilizing the grinding self-sharpening property of the grinding wheel.
Further, a car door locking sensor is installed on a frame of the steel rail grinding trolley, and a sensor induction plate is installed on a car door of the fireproof and dustproof device. When the vehicle door is opened, the sensor induction plate is far away from the vehicle door locking sensor, the steel rail grinding wagon obtains a vehicle door locking signal, and the steel rail grinding wagon prohibits operation traveling. When the vehicle door is closed, the sensor induction plate is close to the vehicle door locking sensor, the steel rail grinding wagon obtains a driving permission signal, and the steel rail grinding wagon allows operation walking.
Furthermore, continuous enveloping grinding is carried out on the rail head surface of the steel rail through the outer circumference of the grinding wheel to eliminate the small section of the rail head surface of the steel rail and ensure that the roughness of the rail head surface of the ground steel rail is lower than 5 microns.
Furthermore, the grinding motor adopts a vertical installation mode, and an output shaft of the grinding motor is connected with a grinding wheel through a transmission box, so that power reversing transmission between the grinding motor and the grinding wheel is realized. And a first transmission gear and a second transmission gear are arranged in the transmission box, the first transmission gear is connected with a motor shaft of the grinding motor, and the second transmission gear is connected with a grinding wheel rotating shaft of the grinding wheel. The output power of the grinding motor is transmitted into the transmission box through the motor shaft and is transmitted to the grinding wheel rotating shaft through the first transmission gear and the second transmission gear which are meshed with each other in a reversing mode, and therefore the grinding wheel is driven to realize tangential grinding of the steel rail.
Further, the thickness of the grinding wheel is set to be 20-60 mm.
By implementing the technical scheme of the steel rail cambered surface grinding method provided by the invention, the following beneficial effects are achieved:
(1) according to the method for polishing the steel rail cambered surface, the steel rail cambered surface is polished by adopting the grinding wheel cambered surface, the polishing unit is simple in structure and large in polishing deflection angle, the profile surface of the steel rail can be fully polished, the problem of wave polishing caused by the conventional grinding wheel plane polishing is effectively solved, and meanwhile, the design of a pressing, deflecting and traversing mechanism is provided, so that the steel rail cambered surface can be polished without touching obstacles on two sides of the steel rail, the requirement of polishing a railway main track can be met, and turnout polishing can be carried out;
(2) according to the rail cambered surface polishing method, the polishing unit is in a modular design, the polishing unit frame is in a crank arm structure, the polishing motor is in a vertical installation mode, the polishing direction is converted through the transmission case, the posture of the polishing motor can be independently controlled, the setting is flexible, the polishing angle range is large, the structural design is simplified, and the requirements of small-size layout and small-space installation can be met;
(3) the steel rail cambered surface polishing method disclosed by the invention has the advantages that the combined steel rail polishing is adopted, the enveloping type polishing on the surface of the steel rail is realized through 1-5 cambered surface polishing units, the complete coverage on the rail surface of the steel rail can be realized, the problem of small planes caused by the plane polishing of a traditional grinding wheel is effectively solved, and the surface roughness of the polished steel rail can be below 5 microns; the grinding wheel has high cutting and grinding capacity and good abrasive particle self-sharpening performance, and the continuously generated abrasive dust can take away a large amount of heat, so that the temperature of the steel rail is effectively controlled to prevent the steel rail from generating a grinding bluing phenomenon;
(4) according to the method for polishing the steel rail cambered surface, a polishing operation linkage control mode is adopted, a detection signal can be given when a vehicle door is opened and closed, and when the vehicle door is opened, the polishing vehicle cannot run, so that the technical problem that when the traditional steel rail polishing vehicle is used for internal inspection and maintenance of a polishing trolley, serious potential safety hazards are brought to maintenance and inspection personnel under the vehicle when an operator of the polishing vehicle starts the running vehicle is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, from which other embodiments can be derived by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a prior art grinding method using a grinding wheel for end face grinding;
FIG. 2 is a right side view of a schematic construction of one embodiment of a rail grinding unit on which the method of grinding the cambered surface of a rail of the present invention is based;
FIG. 3 is a front view of a schematic configuration of a rail grinding unit on which the method of grinding the curved surface of a rail of the present invention is based;
FIG. 4 is a left side view of a schematic configuration of a rail grinding unit on which the method of grinding the curved surface of a rail of the present invention is based;
FIG. 5 is a partially enlarged schematic view of portion A of FIG. 4;
FIG. 6 is a rear elevational view of a schematic configuration of one embodiment of a rail grinding unit upon which the method of grinding the cambered surface of a rail of the present invention is based;
FIG. 7 is a schematic plan view of the structure of one embodiment of a rail grinding unit on which the method of grinding the curved surface of a rail of the present invention is based;
FIG. 8 is a schematic perspective view of a rail grinding unit according to an embodiment of the rail camber grinding method of the present invention;
FIG. 9 is a schematic perspective view of another embodiment of a rail grinding unit in accordance with the method of the present invention;
FIG. 10 is a schematic view of the grinding principle of one embodiment of the rail grinding unit in a first state, on which the rail cambered surface grinding method of the present invention is based;
FIG. 11 is a schematic view of the grinding principle of one embodiment of the rail grinding unit in the second state, based on the rail arc surface grinding method of the present invention;
FIG. 12 is a schematic view of the grinding principle of one embodiment of the rail grinding unit in state three, on which the rail arc grinding method of the present invention is based;
FIG. 13 is a schematic structural view of a circular arc surface of the top surface of a rail according to the present invention;
FIG. 14 is a schematic view of a grinding wheel assembly in an embodiment of a rail grinding unit based on the rail arc grinding method of the present invention;
FIG. 15 is a schematic structural view of a rail grinding cart in accordance with one embodiment of the present invention;
FIG. 16 is a schematic structural view of a rail grinding carriage for removing a fireproof and dustproof device according to an embodiment of the rail grinding method;
FIG. 17 is a front elevational view of a schematic configuration of a rail grinding cart in accordance with one embodiment of the present invention;
fig. 18 is a partially enlarged structural view of a portion B in fig. 17;
FIG. 19 is a schematic perspective view of a rail grinding cart in accordance with one embodiment of the present invention;
FIG. 20 is a schematic view showing a layout structure of a grinding wheel in an embodiment of a rail grinding carriage on which the rail arc surface grinding method of the present invention is based;
FIG. 21 is a schematic view showing a layout structure of a grinding wheel in another embodiment of a rail grinding carriage on which the rail arc surface grinding method of the present invention is based;
FIG. 22 is a schematic structural view of one embodiment of a rail grinding wagon for use in the method of grinding the arcuate surface of a rail of the present invention;
in the figure: 1-traversing guide post, 2-traversing guide sleeve, 3-grinding unit rack, 4-pushing guide sleeve, 5-pushing guide post, 6-traversing drive mechanism, 7-pushing drive mechanism, 8-deflecting drive mechanism, 9-grinding wheel, 10-grinding motor, 11-motor mount, 12-connecting disk, 13-deflecting rack, 14-transmission box, 15-protective cover, 16-first transmission gear, 17-motor shaft, 18-grinding wheel rotating shaft, 19-grinding wheel mounting disk, 20-second transmission gear, 21-connecting beam, 22-mount, 23-rail, 24-sleeper, 25-top soft curtain, 26-vehicle door, 27-bottom soft curtain, 28-lifting mechanism, 29-traction mechanism, 30-traveling wheels, 31-vehicle door locking sensors, 32-sensor induction plates, 33-arm supports, 34-rib plates, 100-steel rail polishing units, 101-first polishing units, 102-second polishing units, 103-third polishing units, 104-fourth polishing units, 105-fifth polishing units, 200-steel rail polishing trolleys, 300-vehicle frames, 400-steel rail polishing vehicles, 500-fireproof and dustproof devices and 600-vehicle bodies.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the 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.
Referring to fig. 1 to 22, a specific embodiment of the method for grinding the arc surface of the steel rail according to the present invention is shown, and the present invention will be further described with reference to the accompanying drawings and the specific embodiment.
Example 1
As shown in fig. 2 to 12, an embodiment of a rail grinding unit 100 according to the present invention specifically includes:
a traversing mechanism;
a grinding motor 10, an output shaft of which is connected with the grinding wheel 9, and the rail 23 is ground through the outer circumference of the grinding wheel 9;
the polishing unit frame 3 is used for installing the polishing motor 10 and can be movably connected to the transverse moving mechanism, and the transverse moving mechanism can drive the polishing motor 10 to realize transverse moving operation;
the deflection mechanism is connected between the polishing unit frame 3 and the polishing motor 10, and the deflection operation is realized by the deflection mechanism through the energy band polishing motor 10;
and the pressing mechanism is connected between the deflection mechanism and the grinding motor 10, and the grinding motor 10 can be driven by the pressing mechanism to realize lifting and pressing operations.
Wherein, the outer circumference of the grinding wheel 9 is processed into a grinding working surface corresponding to the rail head cambered surface of the steel rail 23. The grinding motor 10 further adopts a vertical installation structure, the working surface of the grinding wheel 9 is an outer circumferential surface, and the installation direction of the grinding motor 10 is parallel to the rotating working surface of the grinding wheel 9.
The transverse moving mechanism further comprises a transverse moving guide pillar 1, a transverse moving guide sleeve 2 and a transverse moving driving mechanism 6, and the polishing unit frame 3 is movably installed on the transverse moving guide pillar 1 through the transverse moving guide sleeve 2. One end of the traverse driving mechanism 6 is mounted on the grinding unit frame 3, and the other end is mounted on the frame 300 of the rail grinding trolley 200. The transverse driving mechanism 6 drives the polishing unit frame 3 to move on the transverse guide post 1 along the direction L shown in the attached drawings 8-12, and then drives the polishing motor 10 and the polishing grinding wheel 9 to move in the transverse direction of the steel rail 23.
The pressing mechanism further comprises a pressing guide post 4, a pressing guide sleeve 5 and a pressing driving mechanism 7, a motor mounting seat 11 is arranged at the lower part of the pressing guide post 4, and the upper part of the pressing guide post 4 is fixed with a polishing motor 10 through a connecting disc 12. The grinding motor 10 is fixed on the motor mounting seat 11, the motor mounting seat 11 is connected with the lower pressing guide pillar 4 through a bolt, and the upper part of the lower pressing guide pillar 4 is fixed with the grinding motor 10 through a connecting disc 12. One end of the downward pressing driving mechanism 7 is connected with the downward pressing guide sleeve 5, the other end of the downward pressing driving mechanism 7 is connected with the connecting disc 12, and the downward pressing driving mechanism 7 drives the grinding motor 10 to move up and down in the vertical direction (the direction shown as H in the attached drawings 8-12), so that the grinding wheel 9 connected with the grinding motor 10 through the transmission case 14 is driven to move up and down. The pressing guide pillars 4 in the rail grinding unit 100 may be arranged in a structure of two or more. The upper ends of the two lower guide pillars 4 are connected through the connecting disc 12, and the lower ends of the two lower guide pillars are not provided with the connecting disc 12, so that the steel rail grinding unit 100 can have more sufficient movement space, and the grinding requirements of the profiles and angles of various steel rails 23 are met.
The deflection mechanism further comprises a deflection driving mechanism 8 and a deflection frame 13, one end of the deflection driving mechanism 8 is fixed on the grinding unit frame 3, and the other end is connected with the deflection frame 13. The deflection frame 13 is connected (welded) with the lower pressure guide sleeve 5 into a whole and extends towards the left side and the right side, one side of the deflection frame 13 is hinged with the polishing unit frame 3, and the other side of the deflection frame is hinged to the polishing unit frame 3, extends outwards and is hinged with the movable end of the deflection driving mechanism 8. Therefore, the grinding motor 10 and the grinding wheel 9 can be driven by the deflection driving mechanism 8 to perform deflection motion along the direction W shown in fig. 8 to 12.
The grinding unit frame 3 further comprises two arm supports 33 which are parallel to each other and are arranged oppositely along the longitudinal direction and adopt a hollow crank arm structure, each arm support 33 comprises two rib plates 34 which are parallel to each other and are arranged oppositely along the longitudinal direction, the transverse guide sleeve 2 is connected to the upper parts of the two rib plates 28, and the deflection driving mechanism 8 is arranged between the two rib plates 34 of one grinding unit frame 3, so that the transverse width size of the steel rail grinding unit 100 is reduced, and the layout and the size of the whole steel rail grinding wagon 400 are facilitated.
The output shaft of the grinding motor 10 is further connected to the grinding wheel 9 via a transmission case 14. As shown in fig. 5, one end of the transmission case 14 is connected to the motor shaft 17, the other end is connected to the wheel mounting plate 19, and the grinding wheel 9 is fixed to the wheel mounting plate 19. The transmission box 14 comprises a protective cover 15, and a first transmission gear 16 and a second transmission gear 20 which are arranged on the protective cover 15, wherein the first transmission gear 16 is connected with a motor shaft 17, and the second transmission gear 20 is connected with a grinding wheel rotating shaft 18. The output power of the grinding motor 10 is transmitted into the transmission box 14 through the motor shaft 17, and is transmitted to the grinding wheel rotating shaft 18 through the first transmission gear 16 and the second transmission gear 20 which are meshed with each other in a reversing way, so that the grinding wheel 9 is driven to rotate tangentially. The whole steel rail grinding unit 100 is very compact in structural layout, the grinding motor 10 and the cambered surface grinding wheel 9 are mounted up and down, power reversing transmission is performed by the transmission case 14, the width size of the steel rail grinding unit 100 is greatly reduced, the requirements of small-size layout and small-space mounting can be well met, the space layout and the size design of the whole steel rail grinding wagon 400 are facilitated, and the curve trafficability and the dynamic performance of the steel rail grinding wagon 400 are facilitated.
The transverse guide pillar 1 is further fixedly arranged on a frame 300 of the rail grinding trolley 200 through a mounting seat 22, the transverse guide sleeves 2 are connected with the top of the grinding unit frame 3, and a connecting beam 21 is arranged between the two transverse guide sleeves 2.
The thickness of the grindstone 9 is further 20mm to 60mm, and the working surface of the grindstone 9 is processed into any one of R300, R80, and R13 circular arc surfaces.
The transverse moving driving mechanism 6, the pressing driving mechanism 7 and the deflecting driving mechanism 8 can adopt any one of an oil cylinder, an air cylinder, a motor or other driving modes. Meanwhile, the traverse driving mechanism 6, the down-pressing driving mechanism 7, and the deflection driving mechanism 8 in the rail grinding unit 100 described in embodiment 1 are all provided with sensors, so that the position of the rail 23 can be precisely ground, and the grinding wheel 9 with a single cambered surface structure can grind the rail top of the rail 23 through the traverse and deflection actions, and can also grind areas such as rail heads. In addition, the traversing mechanism and the pressing mechanism may be operated by a combination of a guide post and a guide sleeve, for example: similar technical effects are realized between the guide post and the guide sleeve through different technical schemes such as a bearing, a copper bush or a linear bearing or a needle bearing.
The steel rail grinding unit 100 described in embodiment 1 adopts the cambered surface of the grinding wheel 9 to grind the cambered surface of the steel rail 23, so that the problems of corrugation and facet caused by grinding the plane of the traditional grinding wheel can be effectively reduced, and meanwhile, the steel rail grinding unit 100 is provided with a transverse moving mechanism, a pressing mechanism and a deflecting mechanism, so that the requirements of grinding the main track of a railway can be met, and turnout grinding can be performed. The rail polishing unit 100 adopts a modular design, not only is the structural design simplified, but also the requirements of small-size layout and small-space installation can be met, the posture of the polishing motor 10 can be independently controlled, the polishing angle range is large, the arrangement is flexible, the polishing of the steel rail 23 cambered surface can be realized through the combination and collocation of the rail polishing unit 100, and various technical problems caused by the polishing of the traditional grinding wheel plane are avoided.
Example 2
As shown in fig. 15 to 19, an embodiment of a rail grinding wagon 200 according to the present invention is disposed at the bottom of a rail grinding wagon 400, and specifically includes:
a carriage 300, and a rail grinding unit 100 mounted on the carriage 300.
a lifting mechanism 28 having one end connected to the bottom of the rail grinding wagon 400 and the other end connected to the frame 300;
a traction mechanism 29 mounted at the bottom of the rail grinding wagon 400 and connected with the frame 300;
and a fireproof and dustproof device 500 installed on the frame 300 and disposed outside the frame 300, and the rail grinding unit 100 is installed on the frame 300 and disposed inside the fireproof and dustproof device 500.
The whole rail grinding trolley 200 comprises a lifting mechanism 28, a traction mechanism 29, traveling wheels 30, a rail grinding unit 100, a frame 300, a fireproof and dustproof device 500 and the like. The lifting mechanism 28 and the traction mechanism 29 are connected to the bottom of the car body 600 of the rail grinding wagon 400 at one end and to the car frame 300 at the other end. The rail grinding unit 100 is mounted on the carriage 300. The rail grinding unit 100 and the vehicle frame 300 are externally provided with a fireproof and dustproof system 500, which comprises a top soft curtain 25, a vehicle door 26, a bottom soft curtain 27 and the like. The fireproof and dustproof system 500 is installed on the frame 300, and can play a role in sealing the environment and isolating scrap iron, sparks and dust.
The traction mechanism 29 is further of a vertically-mounted structure, so that the traction defect caused by a cable-stayed traction mechanism of a traditional grinding trolley can be overcome, the load shedding effect caused by the vertical traction component force of a cable-stayed traction rod is avoided, the overall size space of the grinding device can be shortened, and the size design and layout of the steel rail grinding wagon 400 are facilitated.
Two rail grinding units 100 are installed along the operation direction on the frame 300, wherein the working surface of the grinding wheel 9 of each rail grinding unit 100 positioned on the same side corresponds to one section of the arc surface of the rail 23, and the enveloping of the whole grinding surface of the single-side rail 23 is realized through the combination of the grinding wheels 9 of the single-side rail grinding units 100. Wherein, at least 5 rail grinding units 100 are arranged on one side of the vehicle frame 300, and the working surface of the grinding wheel 9 of the rail grinding unit 100 comprises a R300 in the middle, R80 on two sides and an arc surface of R13 near the rail head. As shown in fig. 20 and 21, the rail camber grinding unit 100 is distributed on the one-side carriage 300 in a central symmetry with respect to a geometric center point of the one-side carriage. The rail cambered surface grinding unit 100 is distributed on the left and right frames 300 and is axisymmetric with respect to the longitudinal central axis of the rail grinding trolley 200 or is centrosymmetric with respect to the geometric central point of the rail grinding trolley 200. Through the combination mode of the rail cambered surface grinding unit 100, the rail grinding wagon 400 can finish reciprocating grinding on the rail 23 without reversing, and the rail 23 with higher grinding quality can be formed.
In this embodiment, 5 rail grinding units 100, which are a first grinding unit 101, a second grinding unit 102, a third grinding unit 103, a fourth grinding unit 104 and a fifth grinding unit 105, are sequentially installed on one side of the carriage 300 along the longitudinal direction. The outer circumferential surface of the grinding wheel 9 of the first grinding unit 101 is processed with an arc surface of R13 for grinding the rail head outer side R13 arc surface of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the second grinding unit 102 is processed with an arc surface of R80 for grinding the rail head outer side R80 arc surface of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the third grinding unit 103 is processed with an R300 arc surface for grinding the R300 arc surface in the middle of the rail head of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the fourth grinding unit 104 is processed with an arc surface of R80 for grinding the arc surface of the rail head inner side R80 of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the fifth grinding unit 105 is processed with an arc surface of R13 for grinding the arc surface of the rail head inner side R13 of the steel rail 23.
As another modification of the present embodiment, 5 rail grinding units 100, which are a first grinding unit 101, a second grinding unit 102, a third grinding unit 103, a fourth grinding unit 104 and a fifth grinding unit 105, are sequentially installed on one side of the carriage 300 along the longitudinal direction. The outer circumferential surface of the grinding wheel 9 of the first grinding unit 101 is processed with an arc surface of R13 for grinding the rail head inner side R13 arc surface of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the second grinding unit 102 is processed with an arc surface of R80 for grinding the arc surface of the rail head inner side R80 of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the third grinding unit 103 is processed with an R300 arc surface for grinding the R300 arc surface in the middle of the rail head of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the fourth grinding unit 104 is processed with an arc surface of R80 for grinding the rail head outer side R80 arc surface of the steel rail 23. The outer circumferential surface of the grinding wheel 9 of the fifth grinding unit 105 is processed with an arc surface of R13 for grinding the rail head outer side R13 arc surface of the steel rail 23.
Since the embodiment of the present invention adopts the cambered surface grinding manner, when the rail is ground, sparks are sprayed toward the front or rear end of the rail 23 according to the direction of rotation of the grinding motor 10. Therefore, furthermore, dust suction devices can be arranged at the front end and the rear end of the steel rail grinding unit 100, and grinding dust and scrap iron can be quickly and efficiently absorbed.
The rail dolly 200 of polishing that embodiment 2 described is for having the dolly of polishing of 10 bistriques, rail unit 100 of polishing adopts the structural arrangement of bilateral symmetry formula all around, specifically for adopting 5 to polish unit 100 for a set of combination formula rail, each side of frame 300 all has 5 cambered surface bistriques, arrange through the combination formula that corresponds 5 cambered surface grindstones to unilateral rail, rail dolly 200 of polishing carries out the one time combination envelope formula and polishes and can accomplish the full coverage to 23 profile shapes of rail, can effectively get rid of the facet problem that traditional emery wheel plane polished and brought.
Example 3
The embodiment of the invention relates to a method for grinding the cambered surface of a steel rail, which specifically comprises the following steps:
a plurality of rail grinding units 100 are longitudinally installed on a frame 300 of the rail grinding trolley 200, the rail grinding units 100 are adjusted to a set transverse position and a set inclination angle, and the outer circumference of a grinding wheel 9 of each rail grinding unit grinds the rail head of the rail 23. The working surface of the grinding wheel 9 of each rail grinding unit 100 corresponds to a section of arc surface of the cross section of the rail head of the rail 23, and the enveloping of the whole grinding section of the rail head of the single-side rail 23 is realized through the combination of the grinding wheels 9.
As shown in fig. 13, in the present embodiment, the top arc surface of the rail 23 is divided into 5 arc surfaces, which are R300 at the center, R80 at both sides, and R13 near the rail head. Therefore to this kind of cambered surface structure of rail 23, this embodiment sets up 5 rail grinding units 100 to rail 23 with one side at least, and the emery wheel 9 of rail grinding unit 100 all adopts the cambered surface emery wheel, and each cambered surface emery wheel all corresponds to one section cambered surface of rail 23, can realize the envelope to whole rail 23 top surface through the mode of combination rail grinding unit 100. At least 5 rail grinding units 100 are arranged on one side of the vehicle frame 300, and the working surfaces of grinding wheels 9 of the rail grinding units 100 respectively correspond to arc surfaces of the middle part R300, the two sides R80 of the middle part and the outermost side R13 of the rail head of the grinding rail 23. As shown in fig. 14, a is a grinding wheel 9 with an R300 arc surface machined on the outer circumferential surface, B is a grinding wheel 9 with an R80 arc surface machined on the outer circumferential surface, C is a grinding wheel 9 with an R13 arc surface machined on the outer circumferential surface, and D is a grinding wheel 9 with an unprocessed outer circumferential surface.
Aiming at the steel rail 23 on the same side, the enveloping of the arc surface of the whole steel rail 23 can be realized by the combined grinding of the steel rail grinding units 100 adopting 5 arc surface grinding wheels in the embodiment, but the enveloping grinding of the steel rail 23 by a single or a plurality of grinding wheels (grinding heads) 9 can also be realized by the combination and grinding strategy design of 1 to 5 steel rail grinding units 100 according to the condition of the actual steel rail grinding wagon 400.
In the present embodiment, a first sanding unit 101, a second sanding unit 102, a third sanding unit 103, a fourth sanding unit 104, and a fifth sanding unit 105 are installed in sequence in the longitudinal direction at one side of the carriage 300. The circular arc surface of R13 is machined on the outer circumferential surface of the grinding wheel 9 of the first grinding unit 101 for grinding the rail head outer side R13 circular arc surface of the steel rail 23. An arc surface of R80 is machined on the outer circumferential surface of the grinding wheel 9 of the second grinding unit 102 for grinding the rail head outer side R80 arc surface of the steel rail 23. And processing an arc surface of R300 on the outer circumferential surface of the grinding wheel 9 of the third grinding unit 103, and grinding the arc surface of R300 in the middle of the rail head of the steel rail 23. The arc surface of R80 is machined on the outer circumferential surface of the grinding wheel 9 of the fourth grinding unit 104, and is used for grinding the arc surface of the rail head inner side R80 of the steel rail 23. An arc surface of R13 is machined on the outer circumferential surface of the grinding wheel 9 of the fifth grinding unit 105 for grinding the rail head inner side R13 arc surface of the steel rail 23.
As another modification of the present embodiment, a first dressing unit 101, a second dressing unit 102, a third dressing unit 103, a fourth dressing unit 104, and a fifth dressing unit 105 are installed in this order in the longitudinal direction on one side of the carriage 300. The circular arc surface of R13 is machined on the outer circumferential surface of the grinding wheel 9 of the first grinding unit 101 for grinding the rail head inner side R13 circular arc surface of the steel rail 23. The circular arc surface of R80 is machined on the outer circumferential surface of the grinding wheel 9 of the second grinding unit 102 for grinding the rail head inner side R80 circular arc surface of the steel rail 23. And processing an arc surface of R300 on the outer circumferential surface of the grinding wheel 9 of the third grinding unit 103, and grinding the arc surface of R300 in the middle of the rail head of the steel rail 23. The arc surface of R80 is machined on the outer circumferential surface of the grinding wheel 9 of the fourth grinding unit 104 for grinding the rail head outer side R80 arc surface of the steel rail 23. An arc surface of R13 is machined on the outer circumferential surface of the grinding wheel 9 of the fifth grinding unit 105 for grinding the rail head outer side R13 arc surface of the steel rail 23.
During the rail 23 grinding process, if the cutting and grinding capability of the grinding wheel 9 is insufficient, the abrasive particles have poor self-sharpening performance, and the temperature between the grinding wheel 9 and the rail 23 is increased sharply. If the grinding wheel 9 has high cutting and grinding capacity and the abrasive particles are self-sharpening, a great amount of heat can be taken away by the continuously generated abrasive dust, so that the phenomenon that the steel rail 23 is ground and blued is prevented by effectively controlling the temperature of the steel rail 23. The surface heat treatment process of the steel rail is different aiming at different grades of steel rail materials, so that the hardness value of the surface of the steel rail and the depth of a hardened layer are different, and according to different steel rails, the steel rail grinding unit 100 in the embodiment selects different grinding wheels 9 to perform matching operation so as to realize good grinding effect. In this embodiment, the grinding wheel 9 may be prepared in two ways, the first is to process the circular arc surfaces of R300, R80 and R13 on the outer circumferential surface of the grinding wheel 9 in advance, and then perform matched grinding with the circular arc surface of the rail head of the steel rail 23 through the circular arc surfaces. The other is that the outer circumferential surface of the grinding wheel 9 is not processed in advance, and the grinding wheel 9 automatically generates a corresponding arc surface according to the arc surface of the steel rail grinding position in the grinding operation process by utilizing the grinding self-sharpening property of the grinding wheel 9.
The grinding motor 10 is installed vertically, and an output shaft of the grinding motor 10 is connected with the grinding wheel 9 through a transmission box 14, so that power reversing transmission between the grinding motor 10 and the grinding wheel 9 is achieved. A first transmission gear 16 and a second transmission gear 20 are arranged in the transmission box 14, the first transmission gear 16 is connected with a motor shaft 17 of the grinding motor 10, and the second transmission gear 20 is connected with a grinding wheel rotating shaft 18 of the grinding wheel 9. The output power of the grinding motor 10 is transmitted into the transmission box 14 through the motor shaft 17, and is transmitted to the grinding wheel rotating shaft 18 through the first transmission gear 16 and the second transmission gear 20 which are meshed with each other in a reversing way, so that the grinding wheel 9 is driven to realize tangential grinding on the steel rail 23.
The thickness of the grinding wheel 9 is set to be 20 mm-60 mm, continuous enveloping grinding is carried out on the rail head surface of the steel rail 23 through the outer circumference surface of the grinding wheel 9, the small section of the rail head surface of the steel rail 23 is eliminated, and the rail head surface roughness of the ground steel rail 23 is ensured to be lower than 5 microns.
A door lock sensor 31 is mounted on a frame 300 of the rail grinding wagon 200, and a sensor induction plate 32 is mounted on a door 26 of the fireproof and dustproof device 500. When the door 26 is opened, the sensor sensing plate 32 is separated from the door lock sensor 31, the rail grinding wagon 400 receives a door lock signal, and the rail grinding wagon 400 prohibits the work travel. When the door 26 is closed, the sensor induction plate 32 is close to the door locking sensor 31, the rail grinding wagon 400 obtains a running permission signal, and the rail grinding wagon 400 permits operation running.
Example 4
As shown in fig. 20, an embodiment of a rail grinding wagon 400 to which the present invention is applied specifically includes:
a vehicle body 600;
and a rail grinding wagon 200 as described in example 2, disposed under the wagon body 600.
As shown in fig. 17 and 18, a door lock sensor 31 is mounted on the frame 300 of the rail grinding wagon 200, and a sensor sensing plate 32 is mounted on the door 26 of the fireproof and dustproof device 500. When the door 26 is opened, the sensor sensing plate 32 is away from the door lock sensor 31, and the rail grinding wagon 400 receives a door lock signal, and the rail grinding wagon 400 is prohibited from traveling. When the door 26 is closed, the sensor induction plate 32 is close to the door locking sensor 31, the rail grinding wagon 400 obtains a running permission signal, and the rail grinding wagon 400 permits operation running. The door lock sensor 31 may be a contact or non-contact sensor. Traditional rail grinding wagon is when carrying out the inside inspection of dolly of polishing and maintenance, if operating personnel starts operation rail grinding wagon and will bring very big potential safety hazard to under the car dimension guarantor detection personnel. The rail grinding wagon 400 described in this embodiment provides a coordinated control mode, which provides a detection signal when the door 26 is opened and closed, and the rail grinding wagon 400 cannot run the vehicle when the door 26 is opened.
The rail grinding wagon 400 described in this embodiment is suitable for prevention, correction, or pre-grinding of subways, high-speed rails, trams, regular railroads, turnouts, and urban tram rails, and can also grind fixed or moving turnouts in a fully automatic mode.
In the rail arc surface grinding method described in this embodiment, the outer circumferential surface of the grinding wheel 9 is used for enveloping grinding the surface of the rail 23, the grinding method can be used for fully and continuously grinding the contour surface of the rail 23, no small section occurs, and the surface roughness of the ground rail 23 can reach below 5 micrometers. In addition, since rail grinding is performed using the outer circumferential surface of the grinding wheel 9, the thickness of the grinding wheel 9 is 20mm to 60mm, which is greatly reduced in size compared to the diameter of the grinding wheel 9. Consequently, this kind of mode of polishing has the advantage of coming with the life when carrying out regional polishing such as switch, guardrail, can polish under the prerequisite of the barrier of not touching the rail both sides, obtains great promotion to regional polishing such as switch.
It should be noted that, in the embodiment of the present invention, the traverse driving mechanism 6, the downward pressing driving mechanism 7, and the deflecting driving mechanism 8 may be embodied in the form of an oil cylinder, an air cylinder, or an electric cylinder. The guide sleeve and guide column combined structure of the transverse guide column 1 and the transverse guide sleeve 2, and the lower guide column 4 and the lower guide sleeve 5 can also adopt a guide rail and slider combination, a gear and rack combination and other alternative structures to realize the function of a sliding pair.
By implementing the technical scheme of the steel rail cambered surface grinding method described in the specific embodiment of the invention, the following technical effects can be achieved:
(1) according to the rail cambered surface polishing method described in the specific embodiment of the invention, the grinding wheel cambered surface is adopted to polish the rail cambered surface, the polishing unit has a simple structure and a large polishing deflection angle, the profile surface of the rail can be fully polished, the wave abrasion problem caused by the traditional grinding wheel plane polishing is effectively reduced, and meanwhile, the design of a pressing, deflecting and traversing mechanism is provided, so that the rail cambered surface polishing method can polish without touching obstacles on two sides of the rail, not only can meet the railway main line polishing requirement, but also can polish turnouts;
(2) according to the rail cambered surface polishing method described in the specific embodiment of the invention, the polishing unit is in a modular design, the polishing unit frame is in a crank arm structure, the polishing motor is in a vertical installation mode, the polishing direction is converted through the transmission case, the posture of the polishing motor can be independently controlled, the setting is flexible, the polishing angle range is large, the structural design is simplified, and the requirements of small-size layout and small-space installation can be met;
(3) according to the steel rail cambered surface polishing method described in the specific embodiment of the invention, combined steel rail polishing is adopted, wrapped polishing on the surface of a steel rail is realized through 1 to 5 cambered surface polishing units, the rail surface of the steel rail can be completely covered, the problem of small planes caused by traditional grinding wheel plane polishing is effectively solved, and the surface roughness of the polished steel rail can be below 5 micrometers; the grinding wheel has high cutting and grinding capacity and good abrasive particle self-sharpening performance, and the continuously generated abrasive dust can take away a large amount of heat, so that the temperature of the steel rail is effectively controlled to prevent the steel rail from generating a grinding bluing phenomenon;
(4) according to the steel rail cambered surface polishing method described in the specific embodiment of the invention, a polishing operation linkage control mode is adopted, a detection signal can be given when a vehicle door is opened and closed, and when the vehicle door is opened, the polishing vehicle cannot run, so that the technical problem that when the traditional steel rail polishing vehicle is used for carrying out internal inspection and maintenance on a polishing trolley, the operation vehicle is started by an operator of the polishing vehicle to bring serious potential safety hazards to maintenance and inspection personnel under the vehicle is solved.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (11)
1. A rail cambered surface grinding method is characterized by comprising the following steps:
the rail grinding method comprises the following steps that a plurality of rail grinding units (100) are longitudinally arranged on a frame (300) of a rail grinding trolley (200), when a rail (23) is ground, the rail grinding units (100) are adjusted to a set transverse position and a set inclination angle, a grinding wheel (9) is pressed downwards, and the outer circumference of the grinding wheel polishes the rail head of the rail (23); the working surface of the grinding wheel (9) of each steel rail grinding unit (100) corresponds to one section of arc surface of the cross section of the rail head of the steel rail (23), and the envelope of the whole grinding section of the rail head of the single-side steel rail (23) is realized through the combination of the grinding wheels (9).
2. The method for grinding the arc surface of the steel rail according to claim 1, wherein: at least 5 rail grinding units (100) are installed on one side of the vehicle frame (300), and the working surfaces of grinding wheels (9) of the rail grinding units (100) respectively correspond to arc surfaces for grinding the middle part R300, the two sides R80 of the middle part and the outermost side R13 of the rail head of the rail (23).
3. The method of claim 2, wherein: a first grinding unit (101), a second grinding unit (102), a third grinding unit (103), a fourth grinding unit (104) and a fifth grinding unit (105) are sequentially arranged on one side of the frame (300) along the longitudinal direction; processing an arc surface of R13 on the outer circumferential surface of a grinding wheel (9) of the first grinding unit (101) for grinding an arc surface of R13 on the outer side of a rail head of the steel rail (23); processing an arc surface of R80 on the outer circumferential surface of a grinding wheel (9) of the second grinding unit (102) for grinding an arc surface of the R80 on the outer side of the rail head of the steel rail (23); processing an R300 arc surface on the outer circumferential surface of a grinding wheel (9) of the third grinding unit (103) for grinding the R300 arc surface in the middle of the rail head of the steel rail (23); processing an arc surface of R80 on the outer circumferential surface of a grinding wheel (9) of the fourth grinding unit (104) for grinding an arc surface of R80 on the inner side of a rail head of the steel rail (23); and processing an arc surface of R13 on the outer circumferential surface of the grinding wheel (9) of the fifth grinding unit (105) for grinding the arc surface of the inner side R13 of the rail head of the steel rail (23).
4. The method of claim 2, wherein: a first grinding unit (101), a second grinding unit (102), a third grinding unit (103), a fourth grinding unit (104) and a fifth grinding unit (105) are sequentially arranged on one side of the frame (300) along the longitudinal direction; processing an arc surface of R13 on the outer circumferential surface of a grinding wheel (9) of the first grinding unit (101) for grinding an arc surface of R13 on the inner side of a rail head of the steel rail (23); processing an arc surface of R80 on the outer circumferential surface of a grinding wheel (9) of the second grinding unit (102) for grinding an arc surface of R80 on the inner side of a rail head of the steel rail (23); processing an R300 arc surface on the outer circumferential surface of a grinding wheel (9) of the third grinding unit (103) for grinding the R300 arc surface in the middle of the rail head of the steel rail (23); processing an arc surface of R80 on the outer circumferential surface of a grinding wheel (9) of the fourth grinding unit (104) for grinding an arc surface of the R80 on the outer side of the rail head of the steel rail (23); and processing an arc surface of R13 on the outer circumferential surface of the grinding wheel (9) of the fifth grinding unit (105) for grinding the arc surface of the rail head outer side R13 of the steel rail (23).
5. The rail arc grinding method according to any one of claims 1 to 4, wherein: and respectively machining arc surfaces of R300, R80 and R13 on the outer circumferential surface of the grinding wheel (9) in advance, and then performing matched grinding on the arc surfaces and the arc surface of the rail head of the steel rail (23).
6. The method of claim 5, wherein: a door locking sensor (31) is installed on a frame (300) of the rail grinding trolley (200), and a sensor induction plate (32) is installed on a door (26) of the fireproof and dustproof device (500); when the vehicle door (26) is opened, the sensor induction plate (32) is far away from the vehicle door locking sensor (31), the rail grinding wagon (400) obtains a vehicle door locking signal, and the rail grinding wagon (400) prohibits the operation running; when the vehicle door (26) is closed, the sensor induction plate (32) is close to the vehicle door locking sensor (31), the rail grinding wagon (400) obtains a running permission signal, and the rail grinding wagon (400) allows operation running.
7. The rail arc grinding method according to any one of claims 1 to 4, wherein: the outer circumferential surface of the grinding wheel (9) is not processed in advance, and by utilizing the grinding self-sharpening property of the grinding wheel (9), the grinding wheel (9) automatically generates a corresponding cambered surface according to the cambered surface of the grinding position of the steel rail in the grinding operation process.
8. The method of claim 7, wherein: a door locking sensor (31) is installed on a frame (300) of the rail grinding trolley (200), and a sensor induction plate (32) is installed on a door (26) of the fireproof and dustproof device (500); when the vehicle door (26) is opened, the sensor induction plate (32) is far away from the vehicle door locking sensor (31), the rail grinding wagon (400) obtains a vehicle door locking signal, and the rail grinding wagon (400) prohibits the operation running; when the vehicle door (26) is closed, the sensor induction plate (32) is close to the vehicle door locking sensor (31), the rail grinding wagon (400) obtains a running permission signal, and the rail grinding wagon (400) allows operation running.
9. A rail camber grinding method according to claim 1, 2, 3, 4, 6 or 8, characterized in that: and continuously enveloping and grinding the rail head surface of the steel rail (23) through the outer circumference surface of the grinding wheel (9) to eliminate the small section of the rail head surface of the steel rail (23) and ensure that the rail head surface roughness of the ground steel rail (23) is lower than 5 microns.
10. The method of claim 9, wherein: the grinding motor (10) is vertically installed, and an output shaft of the grinding motor (10) is connected with a grinding wheel (9) through a transmission box (14) so as to realize power reversing transmission between the grinding motor (10) and the grinding wheel (9); a first transmission gear (16) and a second transmission gear (20) are arranged in the transmission box (14), the first transmission gear (16) is connected with a motor shaft (17) of the grinding motor (10), and the second transmission gear (20) is connected with a grinding wheel rotating shaft (18) of the grinding wheel (9); the grinding motor (10) outputs power which is transmitted into the transmission box (14) through the motor shaft (17) and transmitted to the grinding wheel rotating shaft (18) through the first transmission gear (16) and the second transmission gear (20) which are meshed with each other in a reversing mode, and therefore the grinding wheel (9) is driven to realize tangential grinding of the steel rail (23).
11. A rail camber grinding method according to claim 1, 2, 3, 4, 6, 8 or 10, wherein: and setting the thickness of the grinding wheel (9) to be 20-60 mm.
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| CN211713544U (en) * | 2020-01-21 | 2020-10-20 | 长沙瀚鹏电子技术有限公司 | Profiling steel rail grinding wagon |
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| CH670666A5 (en) * | 1986-02-28 | 1989-06-30 | Scheuchzer Fils Auguste | Rail head grinder for railway line - uses six sensors to measure heights at spaced points to control oscillating double grinding head |
| CN1447869A (en) * | 2000-07-17 | 2003-10-08 | 林辛格机械制造有限公司 | Method for grinding rail and device for carrying out said method |
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| CN113136750B (en) | 2022-10-04 |
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