CN117904624A - Device and method for repairing damage of train wheels and rail treads - Google Patents
Device and method for repairing damage of train wheels and rail treads Download PDFInfo
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- CN117904624A CN117904624A CN202410088446.8A CN202410088446A CN117904624A CN 117904624 A CN117904624 A CN 117904624A CN 202410088446 A CN202410088446 A CN 202410088446A CN 117904624 A CN117904624 A CN 117904624A
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- 230000006378 damage Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004372 laser cladding Methods 0.000 claims abstract description 57
- 238000005096 rolling process Methods 0.000 claims abstract description 54
- 230000008439 repair process Effects 0.000 claims abstract description 27
- 238000005728 strengthening Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000007547 defect Effects 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims description 54
- 230000008569 process Effects 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000017105 transposition Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 12
- 238000005498 polishing Methods 0.000 abstract description 11
- 239000007769 metal material Substances 0.000 abstract description 4
- 238000005253 cladding Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007709 nanocrystallization Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The invention belongs to the field of metal material processing and surface strengthening treatment, and provides a device and a method for repairing damage to a wheel and a rail tread of a train, which are used for repairing the damage to the wheel and the rail tread and performing surface strengthening treatment, repairing fatigue cracks, damage, peeling and scratch on the wheel and the rail tread by laser cladding, mechanically treating the repaired surface, improving the surface flatness, and improving the contact fatigue resistance and the friction resistance of the wheel and the rail tread repairing position by ultrasonic rolling treatment so as to improve the fatigue resistance of the wheel and the rail tread repairing position, ensure the safe operation of the wheel and the rail and prolong the service life of the wheel and the rail. The invention provides a laser cladding repairing method for the damage defect of the tread of a wheel and a steel rail, which can reduce the turning repair amount of the wheel and the polishing amount of the steel rail caused by the tread damage, prolong the service life of the wheel and the steel rail and reduce the running cost.
Description
Technical Field
The invention belongs to the field of metal material processing and surface strengthening treatment, and particularly relates to a device and a method for repairing damage to wheels of a train and tread surfaces of steel rails.
Background
Wheels and rails are important parts required by train operation, and the problem of damage to the wheels and rails of the train becomes more remarkable along with the development of the train in China towards high speed and heavy load. Wherein, the stripping of the steel rail and the tread is a damage form which seriously affects the running safety of the train. It is common practice to spin and grind wheels after they have been damaged from the rail tread. When the turning repair or polishing times are too many due to the large peeling depth, the turning repair or polishing times are scrapped due to the fact that the sizes of the wheels and the steel rails are limited, so that the service life of the wheels and the steel rails is greatly reduced, the operation cost is increased, and the resources are wasted greatly.
The damaged part can be repaired by a laser cladding method, the original size and performance of the damaged part are recovered, but the surface of the laser cladding coating is too rough, and the laser cladding coating can reach the use standard only by being processed again, and at the moment, the coating with a smooth surface can be obtained by surface mechanical treatment. After the repaired surface is subjected to ultrasonic rolling treatment, the surface layer metal nanocrystallization can be realized, and meanwhile, certain residual compressive stress is generated on the surface of the workpiece, so that the wear resistance and fatigue resistance of the tread of the wheel can be improved. If these processes are separately performed, not only the repair cost is increased, but also the repair period is prolonged, and there is now a lack of a device and method integrating surface treatment, damage repair and surface strengthening to solve the above problems.
Disclosure of Invention
The invention provides a device and a method for repairing damage to wheels and rail treads of a train, which are used for solving the problem that the prior art lacks an integrated means of surface treatment, damage repair and surface strengthening.
In order to achieve the above purpose, the invention proposes the following technical scheme:
A device for repairing the damage of wheels and rail treads of a train comprises a mechanical arm and an integrated working part;
the integrated working part comprises a mechanical grinding device, a laser cladding device and an ultrasonic rolling device;
The laser cladding device is used for carrying out laser repair on fatigue cracks, damage, flaking and scratch on the tread of the wheel;
the mechanical grinding device is used for mechanically treating the surfaces of the wheels and the steel rail before or after the surface repair;
the ultrasonic rolling transposition is used for carrying out ultrasonic rolling treatment on the wheel tread repairing part;
The mechanical grinding device, the laser cladding device and the ultrasonic rolling device are arranged on the mechanical arm.
Preferably, the mechanical grinding device, the laser cladding device and the ultrasonic rolling device are arranged on the mechanical arm through an integrated fixing frame.
Preferably, the grinding tool of the mechanical grinding device is a drill bit, a milling cutter and a grinding wheel.
Preferably, the laser cladding device is designed for coaxial powder feeding, the power of the laser cladding device is 2kW-4kW, and the focal length of the laser cladding device is 10-15mm.
Preferably, the ultrasonic impact frequency of the ultrasonic rolling device is 20kHz.
Preferably, the ultrasonic rolling device is provided with a pressure sensor, and the sensing range is 1-2kN.
Preferably, the moving path of the mechanical arm is any path.
A method of repairing a damaged tread of a wheel and rail of a train comprising the steps of:
step 1, judging the condition of a target, if the target only has fatigue cracks, entering step3, and if the target has punch damage and peeling damage, entering step 2;
Step 2, firstly removing the damage foreign matters on the abrasion surface and cracks of the stripping area by a mechanical grinding device, and then repairing and strengthening the tread of the wheel by a laser cladding device, a mechanical grinding device and an ultrasonic rolling device to finish the process;
step3, judging the specific damage condition of the tread of the wheel, if the target is subjected to tiny fatigue crack damage, entering step 4; if the target has deep cracks, entering a step 5;
step 4, carrying out local metal remelting and heat treatment on the region with fatigue cracks on the tread of the wheel by utilizing a laser cladding device, and carrying out surface strengthening on the remelted region by utilizing an ultrasonic rolling device after eliminating the cracks; ending the flow;
Step 5, grinding the crack defects through a mechanical grinding device, removing the cracks, filling the missing parts through a laser cladding device, grinding the surfaces of the defects to be smooth through the mechanical grinding device, and carrying out strengthening treatment on the ground surfaces through an ultrasonic rolling device; ending the flow.
Preferably, the specific flow of the step2 is as follows:
removing crack defects of the tread of the wheel along the circumferential direction by using a mechanical grinding device;
adjusting the positions and angles of the laser cladding device, the mechanical grinding device and the ultrasonic rolling device according to the requirements;
The mechanical arm moves towards the axial direction of the wheel at a constant speed, and a constant rotating speed is given to the wheel, so that the track of the working part on the tread of the wheel is in a spiral line shape to cover the whole tread of the wheel;
And simultaneously starting a laser cladding device, a mechanical grinding device and an ultrasonic rolling device of the working part, and finishing repairing and strengthening treatment of the wheel tread after the working part walks the complete wheel tread, thereby ending the flow.
Preferably, the micro-crack means a fatigue crack depth of 1mm or less; the deep crack refers to fatigue crack depth of more than 1mm.
The invention has the advantages that:
The invention provides a set of device integrating laser cladding, surface mechanical grinding and ultrasonic rolling into a whole for repairing and surface strengthening the wheel or rail tread, wherein the laser cladding is used for repairing fatigue cracks, damage, peeling and scratch of the wheel or rail tread, the repaired surface is mechanically treated for improving the surface evenness, and in addition, the ultrasonic rolling treatment is used for improving the contact fatigue resistance and friction resistance of the wheel and rail tread repairing position so as to improve the fatigue resistance of the wheel and rail tread repairing position, ensure the safe running of the wheel and prolong the service life of the wheel.
The invention provides a laser cladding repairing method for the damage defect of the tread of a wheel and a steel rail, which can reduce the turning repair amount of the wheel and the polishing amount of the steel rail caused by the tread damage, prolong the service life of the wheel and the steel rail and reduce the running cost. The invention integrates damage repair and surface strengthening treatment, can avoid the complexity of the traditional wheel and rail repair process, realize on-site quick repair, shorten repair time and save repair cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of an apparatus for repairing wheel and rail tread damage in a train;
FIG. 2 is a schematic diagram of the working portion of a device for repairing damage to the wheels and tread of a rail;
fig. 3 is a schematic view of the cooperation of the working portion and the wheel.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The following detailed description is exemplary and is intended to provide further details of the invention. Unless defined otherwise, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.
Referring to fig. 1, the invention provides a device for repairing damage to a wheel and a tread of a rail of a train, which comprises a mechanical arm 5 and an integrated working part, wherein the mechanical arm 5 comprises a mechanical grinding device 2, a laser cladding device 1 and an ultrasonic rolling device 3.
The integrated working part can realize the working state of any angle under the support of the mechanical arm 5.
In a specific embodiment, the mechanical arm 5 may implement positioning at any position in a 1m×1m×1m space.
In a specific embodiment, the spindle of the mechanical polishing apparatus 2 has a function of rotating at a high speed.
In a specific embodiment, the mechanical polishing device 2 may replace polishing tools, such as a drill, a milling cutter, a grinding wheel, etc., as needed to achieve different mechanical polishing functions and effects.
In a specific embodiment, the laser cladding device 1 is a coaxial powder feeding laser cladding device, the power of the coaxial powder feeding laser cladding device is 2kW-4kW, and the laser cladding device has a larger focal length within the range of 10-15mm and can adapt to an uneven surface.
In a specific embodiment, the ultrasonic rolling device 3 is provided with a pressure sensor, so that the pressure of 1-2KN can be realized, and the ultrasonic rolling device also has an ultrasonic impact frequency of 20 kHz.
In a specific embodiment, the mechanical arm 5 may drive the integrated working portion to walk according to a planned path in a working state, for example, during laser cladding, the cladding path may be designed according to a cladding shape and a cladding area, and then the mechanical arm 5 drives the laser cladding device 1 on the working portion to walk according to a designed path according to a design program, where the path may be a reciprocating path or a spiral path.
In a specific embodiment, the mechanical arm 5 is connected with the mechanical grinding device 2, the laser cladding device 1 and the ultrasonic rolling device 3 through the integrated fixing frame 4; the integrated fixing frame 4 may be an arc type, as shown in fig. 2, or may be a flat plate type.
The invention also provides a method for repairing the damage of the wheels and the tread of the steel rail of the train, if the target only has fatigue cracks, the cracks can be eliminated by only melting the crack by laser remelting; if the damage and the peeling damage appear on the target, the damage position of the tread of the wheel 6 is repaired by laser cladding, and then the flatness of the repaired surface is treated by the laser remelting and surface mechanical grinding device 2, so that the repaired tread of the wheel 6 meeting the requirements is finally obtained.
The mechanical grinding device 2 firstly carries out grinding treatment on surface defects such as cracks, stripping, punch damage and other irregular defects, and thoroughly eliminates the crack and punch damage foreign matters; the laser cladding device 1 is utilized to carry out laser cladding on the ground area, and the material selected by the laser cladding has equivalent elastic modulus, hardness and better ductility as the matrix, and has good metallurgical bonding performance as the matrix. The stacking thickness of the laser cladding material is slightly higher than the height of the original material before grinding. After the cladding is completed, the cladding layer is polished to have a desired surface shape by using the mechanical polishing device 2. Finally, the cladding part is subjected to ultrasonic rolling treatment by using an ultrasonic rolling device 3 so as to improve the usability of the cladding metal. The ultrasonic rolling treatment of the repaired tread of the wheel 6 can improve the strength and hardness of the surface with a certain depth, and meanwhile, certain compressive stress is generated on the rolling surface, so that the wear resistance and fatigue resistance of the tread of the wheel 6 can be improved.
Specifically, the method comprises the following steps:
step 1, judging the condition of a target, if the target only has fatigue cracks, entering step3, and if the target has punch damage and peeling damage, entering step 2;
Step 2, firstly, the mechanical grinding device 2 is used for removing the foreign matters on the wearing surface. The laser cladding device 1, the mechanical grinding device 2 and the ultrasonic rolling device 3 are then adjusted to the appropriate working height and angle. The procedure of arranging the mechanical arm 5 moves towards the axial direction of the wheel 6 (X-axis direction in fig. 3) at a constant speed, in addition, a constant rotating speed is given to the wheel 6, the track of the working part on the tread of the wheel 6 is in a spiral line shape, the whole tread of the wheel 6 can be ensured to be covered, three devices of the working part are started at the same time, when the working part walks the whole tread of the wheel 6, the repair and strengthening treatment of the tread of the wheel 6 can be completed, and the process is ended.
Step 3, judging the specific damage condition of the wheel 6 or the steel rail tread, if the target is subjected to tiny fatigue crack damage, entering the step 4; if the target has deep cracks, entering a step 5;
and 4, locally melting the region where fatigue cracks appear on the wheel 6 or the rail tread by using laser to eliminate the cracks, and then carrying out surface strengthening on the remelted region by using an ultrasonic rolling device 3. The laser power can be adjusted according to the depth of the crack, and the larger the laser power is, the deeper the meltable depth is, so that the laser power can be generally used for eliminating the crack within 1mm on the surface; ending the flow.
And 5, firstly, polishing the irregular defects by using a mechanical polishing device 2, thoroughly removing the crack and the damage foreign matters, and filling the missing parts by using a laser cladding device 1. Grinding the repaired surface to be smooth by using the mechanical grinding device 2 again, and finally strengthening the ground surface by using the ultrasonic rolling device 3; ending the flow.
In a specific embodiment, the micro-crack refers to a fatigue crack depth of 1mm or less.
In a specific embodiment, the deep crack refers to a fatigue crack depth greater than 1mm.
In the repairing process, each device can be used independently, and also can be used in combination of a plurality of devices, and different types of tread injuries can be repaired and reinforced by selecting different device combinations according to different injury conditions. The assembled structure of the laser repair, surface mechanical treatment and ultrasonic rolling integrated device and the wheel 6 in cooperation is shown in fig. 3. The tread compressive stress of the wheel 6 is increased after laser repairing and surface ultrasonic rolling reinforcement, the hardness of the tread surface layer is increased, and the fatigue resistance and the friction resistance are obviously improved; the tread roughness of the wheel 6 is reduced, and the rolling contact fatigue life is obviously prolonged.
The device adopted by the method comprises seven parts, namely a high-power laser device 1 for cladding and remelting, a mechanical grinding device 2 for surface turning and milling, an ultrasonic rolling device 3 for repairing surface reinforcement, a sleeve device for lifting action, a rotor device for rotating angle, an arc-shaped fixing frame for fixing action and a connecting device connected with a machine tool.
The repair is generally performed on damaged wheels 6 or rail treads, and when the repair is performed, different device combinations are selected according to specific damage conditions of the wheels 6 or the rail treads.
Example 1:
Obvious stripping and cracks exist on the tread of the wheel 6, the surface is stripped and removed through the mechanical grinding device 2, the metal material with a certain thickness is clad at the defect part through laser cladding, the cladding layer is mechanically ground through the mechanical grinding device 2, and the ultrasonic surface strengthening is carried out on the polished cladding part. The specific implementation steps are as follows:
1, the wheels 6 can be processed on a train or the wheels 6 can be transported to a factory for processing, the wheels 6 are rotated to a position convenient for processing, and the working part of the device is arranged at a proper position on the tread of the wheels 6 by adjusting parameters of the mechanical arm 5.
2, The heights of the laser cladding device 1 and the ultrasonic rolling device 3 are adjusted, and the laser cladding device is lifted to the highest point far away from the tread of the wheel 6.
And 3, adjusting the height of the surface mechanical grinding device 2 to the tread damage position of the wheel 6, grinding the damaged surface, and thoroughly removing cracks.
4, The lifting surface mechanical grinding device 2 is far away from the tread of the wheel 6.
And 5, adjusting the angle of the laser cladding device 1 to enable the cladding head and the tread damaged area of the wheel 6 to be mutually perpendicular, and adjusting the height to the effective working focal length of the position 10-15mm above the tread damaged area.
And 6, setting laser cladding process parameters: the protective air flow is 10-20L/min, the laser power is 2000-4000W, the powder feeding amount is 20-50g/min, the scanning interval is 0,5-1mm, and the scanning speed is 10-50mm/s. The reciprocating scanning path is completed by the mechanical arm 5 controlling the movement of the working part.
And 7, starting a movement program of the laser cladding device 1 and the mechanical arm 5 to clad the damaged part until the cladding height reaches the required height, and stopping the cladding experiment.
8, Lifting the laser cladding device 1 away from the tread of the wheel 6.
And 9, adjusting the height of the surface mechanical grinding device 2 to the tread repairing position of the wheel 6, and grinding the repairing surface to obtain a relatively flat surface.
10, Adjusting the angle of the ultrasonic rolling device 3 to enable the rolling head and the tread repairing area of the wheel 6 to be mutually perpendicular, and adjusting the height to the surface of the repairing area.
11, Setting ultrasonic rolling parameters: the rolling frequency is 20kHz, the contact pressure is 500-2000N, and the rolling spherical diameter is 3-10mm. The rolling path is also controlled by the motion program of the robot arm 5.
And 12, starting the ultrasonic rolling device 3 and the mechanical arm 5 to perform ultrasonic rolling strengthening on the grinding surface of the repairing area until the whole repairing area is completely rolled.
13, Stopping the experiment and restoring the mechanical arm 5 and the device to the initial positions. The invention provides a device and a method for repairing damage to the tread of a train wheel 6 and a steel rail. Repairing fatigue cracks, damage, peeling and scratch on the tread of the wheel 6 by laser cladding, mechanically treating the repaired surface to improve the surface evenness, and improving the contact fatigue resistance and the friction resistance of the tread repairing position of the wheel 6 by ultrasonic rolling treatment, thereby belonging to the field of metal material processing and repairing and surface strengthening treatment. The wheel 6 tread damage repair and surface strengthening treatment are carried out by utilizing a set of device integrating laser cladding, surface mechanical grinding and ultrasonic rolling, the fatigue resistance of the wheel 6 tread repair position is improved, the safe running of the wheel 6 is ensured, and the service life of the wheel 6 is prolonged. The method is characterized in that the defect of tread damage of the wheel 6 is repaired by laser cladding, so that the turning repair quantity of the wheel 6 caused by tread damage in the past can be reduced, the service life of the wheel 6 is prolonged, and the running cost of the wheel 6 is reduced. In addition, the device and the process integrate damage repair and surface strengthening treatment, can repair the wheel at one time on site, avoid transportation and installation procedures among different processing procedures in the traditional wheel 6 repair process, shorten the processing time and save the processing cost.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (10)
1. The device for repairing the damage of the wheels and the rail treads of the train is characterized by comprising a mechanical arm and an integrated working part;
the integrated working part comprises a mechanical grinding device, a laser cladding device and an ultrasonic rolling device;
The laser cladding device is used for carrying out laser repair on fatigue cracks, damage, flaking and scratch on the tread of the wheel;
the mechanical grinding device is used for mechanically treating the surfaces of the wheels and the steel rail before or after the surface repair;
the ultrasonic rolling transposition is used for carrying out ultrasonic rolling treatment on the wheel tread repairing part;
The mechanical grinding device, the laser cladding device and the ultrasonic rolling device are arranged on the mechanical arm.
2. The device for repairing damaged wheels and tread of a railway train according to claim 1, wherein the mechanical grinding device, the laser cladding device and the ultrasonic rolling device are arranged on the mechanical arm through an integrated fixing frame.
3. A device for repairing damaged wheels and treads of rails of a train according to claim 1 wherein the grinding means of the mechanical grinding device are drills, milling cutters and grinding wheels.
4. The device for repairing the damage of the wheels and the tread of the steel rail of the train according to claim 1, wherein the laser cladding device is designed for coaxial powder feeding, the power of the laser cladding device is 2kW-4kW, and the focal length of the laser cladding device is 10-15mm.
5. A device for repairing damaged wheels and treads of rails of a train as in claim 1 wherein the ultrasonic impact frequency of the ultrasonic rolling device is 20kHz.
6. A device for repairing damaged wheels and treads of rails of a train according to claim 1, characterized in that said ultrasonic rolling device is equipped with pressure sensors with an induction range of 1-2kN.
7. A device for repairing damaged wheels and treads of rails of a train as in claim 1 wherein the path of movement of the robotic arm is arbitrary.
8. A method of repairing a damaged train wheel and rail tread based on the apparatus for repairing a damaged train wheel and rail tread of any one of claims 1-7, comprising the steps of:
step 1, judging the condition of a target, if the target only has fatigue cracks, entering step3, and if the target has punch damage and peeling damage, entering step 2;
Step 2, firstly removing the damage foreign matters on the abrasion surface and cracks of the stripping area by a mechanical grinding device, and then repairing and strengthening the tread of the wheel by a laser cladding device, a mechanical grinding device and an ultrasonic rolling device to finish the process;
step3, judging the specific damage condition of the tread of the wheel, if the target is subjected to tiny fatigue crack damage, entering step 4; if the target has deep cracks, entering a step 5;
step 4, carrying out local metal remelting and heat treatment on the region with fatigue cracks on the tread of the wheel by utilizing a laser cladding device, and carrying out surface strengthening on the remelted region by utilizing an ultrasonic rolling device after eliminating the cracks; ending the flow;
Step 5, grinding the crack defects through a mechanical grinding device, removing the cracks, filling the missing parts through a laser cladding device, grinding the surfaces of the defects to be smooth through the mechanical grinding device, and carrying out strengthening treatment on the ground surfaces through an ultrasonic rolling device; ending the flow.
9. The method for repairing damaged wheels and treads of trains according to claim 8, wherein the specific flow of the step 2 is as follows:
removing crack defects of the tread of the wheel along the circumferential direction by using a mechanical grinding device;
adjusting the positions and angles of the laser cladding device, the mechanical grinding device and the ultrasonic rolling device according to the requirements;
The mechanical arm moves towards the axial direction of the wheel at a constant speed, and a constant rotating speed is given to the wheel, so that the track of the working part on the tread of the wheel is in a spiral line shape to cover the whole tread of the wheel;
And simultaneously starting a laser cladding device, a mechanical grinding device and an ultrasonic rolling device of the working part, and finishing repairing and strengthening treatment of the wheel tread after the working part walks the complete wheel tread, thereby ending the flow.
10. A method of repairing a damaged train wheel and rail tread according to claim 8 wherein the microcrack is 1mm or less in fatigue crack depth; the deep crack refers to fatigue crack depth of more than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410088446.8A CN117904624A (en) | 2024-01-22 | 2024-01-22 | Device and method for repairing damage of train wheels and rail treads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410088446.8A CN117904624A (en) | 2024-01-22 | 2024-01-22 | Device and method for repairing damage of train wheels and rail treads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117904624A true CN117904624A (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410088446.8A Pending CN117904624A (en) | 2024-01-22 | 2024-01-22 | Device and method for repairing damage of train wheels and rail treads |
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| Country | Link |
|---|---|
| CN (1) | CN117904624A (en) |
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2024
- 2024-01-22 CN CN202410088446.8A patent/CN117904624A/en active Pending
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