An auxiliary device and operation method for welding turnout in alpine regions

Abstract

The present invention discloses a track frog welding auxiliary device and an operating method for high-altitude cold area, which belongs to the field of track welding technology. The device comprises a chassis and an electric push rod A installed on the chassis, and also comprises: a grinding mechanism, a positioning mechanism, a locking mechanism and a control system electrically connected to a controller installed on the electric push rod A, comprising: a data acquisition module for collecting grinding wheel state data and grinding state data; a grinding wheel state evaluation module for adjusting the grinding wheel speed; a grinding state evaluation module for outputting a grinding state coefficient; a grinding pressure evaluation module for outputting a pressure coefficient and pressure adjustment information; a pressure control module for constructing a pressure target model according to the current grinding pressure information and the pressure coefficient, outputting a target grinding pressure according to the pressure adjustment information, and adjusting the grinding pressure to the target grinding pressure; the present invention can perform precise grinding processing on the waist of the rail before flash welding of the track frog.

Description

Technical Field

[0001] The present invention belongs to the technical field of track welding, and in particular relates to a track frog welding auxiliary device and an operating method in a high-cold region. Background Art

[0002] In the flash welding process of rail switches in cold regions, precise grinding of the rail waist is a key pretreatment step to ensure welding quality. Due to the significant increase in the low-temperature brittleness of rail materials in cold environments, traditional grinding devices often face the following problems:

[0003] In low-temperature environments, parameters such as grinding wheel speed and grinding pressure are difficult to adjust dynamically, resulting in uneven grinding or excessive wear, affecting the surface quality of the rails.

[0004] Existing equipment lacks real-time comprehensive assessment of the grinding wheel status (vibration, particle size, rotation speed, etc.) and grinding conditions (travel speed, rail temperature, etc.), making it difficult to prevent the risk of rail phase change caused by grinding wheel imbalance or high temperature and high speed.

[0005] To address the above problems, an intelligent auxiliary device is proposed, which can collect multi-dimensional data in real time, dynamically adjust grinding parameters, and adapt to extreme low temperature environments. This ensures the accuracy and reliability of rail waist grinding and provides a high-quality foundation for subsequent flash welding. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a track frog welding auxiliary device and an operating method for use in high-altitude and cold regions, which solve the above-mentioned problems.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a track frog welding auxiliary device for high-altitude cold areas, comprising a chassis and an electric push rod A installed on the chassis, and further comprising:

[0008] The grinding mechanism is installed on the chassis and is used to grind the waist of the rail;

[0009] The positioning mechanism is installed on the chassis and is used to guide the movement direction of the grinding mechanism;

[0010] The locking mechanism is installed on the electric push rod A and is used to limit the electric push rod A to the rail;

[0011] The control system is electrically connected to the controller installed on the electric push rod A, including:

[0012] A data acquisition module is used to collect grinding wheel status data and grinding status data, wherein the grinding wheel status data includes grinding wheel vibration information, grinding wheel particle size and grinding wheel speed, and the grinding status data includes travel speed and rail temperature;

[0013] The grinding wheel state evaluation module builds a grinding wheel state model based on the grinding wheel state data to output the grinding wheel state coefficient, and adjusts the grinding wheel speed according to the grinding wheel state coefficient;

[0014] The polishing state evaluation module builds a polishing state model based on the polishing state data and outputs the polishing state coefficient;

[0015] The grinding pressure assessment module constructs a grinding pressure assessment model based on the grinding state coefficient and the grinding wheel state coefficient, outputs the pressure coefficient, and compares it with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, it generates pressure adjustment information;

[0016] The pressure control module builds a pressure target model according to the current polishing pressure information and the pressure coefficient, outputs the target polishing pressure according to the pressure adjustment information, and adjusts the polishing pressure to the target polishing pressure.

[0017] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0018] Further technical solution: Based on the grinding wheel state data, a grinding wheel state model is constructed to output the grinding wheel state coefficient. The specific method of adjusting the grinding wheel speed based on the grinding wheel state coefficient is as follows:

[0019] S201, constructing a grinding wheel state model, and normalizing the grinding wheel state data using the minimum-maximum normalization principle to obtain grinding wheel state index data, including grinding wheel vibration index, grinding wheel particle size index, and grinding wheel speed index;

[0020] S202, importing the grinding wheel state index data into the constructed grinding wheel state model to output the grinding wheel state coefficient;

[0021] S203, comparing the obtained grinding wheel state coefficient with a grinding wheel state coefficient threshold; if the grinding wheel state coefficient is outside the grinding wheel state coefficient threshold, importing the current grinding wheel speed and the grinding wheel state coefficient into a pre-established speed adjustment model to output a grinding wheel target speed, thereby adjusting the grinding wheel speed;

[0022] The grinding wheel state model is expressed as:

[0023]

[0024] in, Indicates the grinding wheel state coefficient, Indicates the matching strength between vibration and particle size, Indicates the synergy between vibration and speed, Indicates the adaptability of particle size and rotation speed, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel grain size index during the data acquisition period, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel speed index during the data acquisition period, is the square of the Pearson correlation coefficient between the grinding wheel grain size index and the grinding wheel speed index during the data acquisition period, is the weight coefficient and ;

[0025] The speed adjustment model is expressed as:

[0026]

[0027] in, Indicates the target speed, Indicates the current speed. represents the proportionality coefficient, Indicates the grinding wheel state coefficient, Indicates the ideal value of the grinding wheel condition coefficient.

[0028] Further technical solution: The steps for obtaining the polishing state coefficient are:

[0029] A polishing state model is constructed based on the polishing state data, the polishing state data is imported into the constructed polishing state model, and the polishing state coefficient is output. The polishing state model is expressed as:

[0030]

[0031] in, Indicates the grinding state coefficient, represents the attenuation coefficient, Indicates the travel speed, represents the rail temperature, Indicates standard travel speed, Indicates standard temperature value.

[0032] Further technical solution: A grinding pressure evaluation model is constructed based on the grinding state coefficient and the grinding wheel state coefficient, and the pressure coefficient is output and compared with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, pressure adjustment information is generated. The grinding pressure evaluation model is expressed as:

[0033]

[0034]

[0035] in, represents the pressure coefficient, represents the sensitivity adjustment factor, Indicates the offset, Represents the weighted linear combination coefficient of the grinding wheel state coefficient and the grinding state coefficient, Indicates the grinding wheel state coefficient, Indicates the grinding state coefficient, represents the weight of the grinding wheel state coefficient and the grinding state coefficient and .

[0036] Further technical solution: The pressure target model adopts a complete continuous time domain formula of proportional-integral control, which is expressed as:

[0037]

[0038] in, Indicates the target grinding pressure, Indicates the current grinding pressure. , is the mean of the upper and lower limits of the pressure coefficient, represents the pressure coefficient, is the proportional gain coefficient, is the integral gain coefficient.

[0039] Further technical solution: The grinding mechanism includes a grinding wheel and a motor, the grinding wheel is detachably connected to the output shaft of the motor detachably mounted on a mounting frame, the mounting frame is fixedly connected to a pressure sensor fixedly mounted with a support arm, and the other end of the support arm is hinged on the chassis, and further includes:

[0040] The pushing assembly is installed on the chassis and is used to push the support arm to drive the grinding wheel closer to or away from the rail.

[0041] Further technical solution: The pushing assembly includes an electric push rod B, a push rod and a hinged head. The electric push rod B is detachably connected to a mounting plate fixedly mounted on the chassis. The hinged head is mounted on the output shaft of the electric push rod B. The hinged head is hinged to the other end of the push rod whose end is hinged to the support arm.

[0042] Further technical solution: The positioning mechanism includes two sets of guide wheels, which are mounted at both ends of the chassis and are rotatably connected to the chassis, and further includes:

[0043] The side positioning assembly is symmetrically installed on the chassis and includes a push handle and a rod body. The push handle is rotatably connected to the positioning shaft fixedly connected to the chassis. The rod body is fixedly connected to the end of the push handle and slidingly cooperates with the slide rail opened on the chassis. A sleeve is fixedly connected to the rod body, and the sleeve is fixedly connected to a frame fixedly connected to an elastic telescopic rod. A positioning wheel is rotatably connected to the frame.

[0044] Further technical solution: The locking mechanism includes a locking block, which is fixedly connected to the output shaft of the electric push rod A and has a locking plate symmetrically slidably installed on it. A double-headed screw is rotatably connected to the locking block and is threadedly connected to the locking plate. A guide rod for guiding the locking plate is fixedly connected to the locking block, and a crank is fixedly connected to the end of the double-headed screw.

[0045] An operating method of a track frog welding auxiliary device in a high-cold region comprises the following steps:

[0046] S1. Use the locking mechanism to limit the electric push rod A to the rail, start the positioning mechanism to position the chassis, and start the grinding mechanism to grind the waist of the rail;

[0047] S2, collecting grinding wheel state data and polishing state data, constructing a grinding wheel state model based on the grinding wheel state data to output a grinding wheel state coefficient, and adjusting the grinding wheel speed based on the grinding wheel state coefficient;

[0048] S3. Build a grinding state model based on the grinding state data and output a grinding state coefficient. Build a grinding pressure assessment model based on the grinding state coefficient and the grinding wheel state coefficient and output a pressure coefficient. Compare the pressure coefficient with a pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, generate pressure adjustment information.

[0049] S4. Constructing a pressure target model according to the current polishing pressure information and the pressure coefficient, outputting a target polishing pressure according to the pressure adjustment information, and adjusting the polishing pressure to the target polishing pressure.

[0050] The present invention provides a track frog welding auxiliary device and operation method for use in cold and high-altitude areas, which has the following beneficial effects compared to the prior art:

[0051] 1. The present invention uses guide wheels, side positioning components, and locking mechanisms to achieve rapid positioning and secure fixation of the device, improving the accuracy of the grinding trajectory. During grinding, multiple modules collaborate to collect grinding wheel status and grinding status data in real time, dynamically adjusting parameters such as speed and pressure to ensure the surface uniformity and smoothness of the rail waist. Furthermore, based on the grinding wheel status model and the grinding status model, risks such as grinding wheel imbalance and overheating can be identified in advance, thereby extending the grinding wheel life and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0053] Figure 2 It is a structural schematic diagram of the grinding mechanism in the present invention.

[0054] Figure 3 It is a structural schematic diagram of the side positioning assembly in the present invention.

[0055] Figure 4 It is a structural schematic diagram of the locking mechanism in the present invention.

[0056] Notes on the accompanying drawings: 1. chassis; 2. electric push rod A; 3. grinding mechanism; 301. grinding wheel; 302. motor; 303. support arm; 304. pressure sensor; 305. mounting bracket; 306. electric push rod B; 307. push rod; 308. mounting plate; 309. hinged joint; 4. positioning mechanism; 401. guide wheel; 402. side positioning assembly; 4021. push handle; 4022. positioning shaft; 4023. rod body; 4024. sleeve; 4025. frame; 4026. elastic telescopic rod; 4027. positioning wheel; 4028. slide rail; 5. controller; 6. locking mechanism; 601. locking block; 602. locking plate; 603. double-headed screw; 604. crank; 605. guide rod; 7. rail. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0059] See also Figure 1 , an embodiment of the present invention provides a track frog welding auxiliary device in a high-cold region, comprising a chassis 1 and an electric push rod A2 mounted on the chassis 1, and further comprising:

[0060] The grinding mechanism 3 is mounted on the chassis 1 and is used to grind the waist of the rail 7;

[0061] The positioning mechanism 4 is installed on the chassis 1 and is used to guide the movement direction of the grinding mechanism 3;

[0062] The locking mechanism 6 is mounted on the electric push rod A2 and is used to restrict the electric push rod A2 to the rail 7;

[0063] The control system is electrically connected to the controller 5 installed on the electric push rod A2 and includes:

[0064] A data acquisition module is used to collect grinding wheel status data and grinding status data. The grinding wheel status data includes grinding wheel vibration information (used to measure the dynamic balance information of the grinding wheel), grinding wheel particle size and grinding wheel speed. The grinding status data includes travel speed and rail 7 temperature.

[0065] The grinding wheel state evaluation module builds a grinding wheel state model based on the grinding wheel state data to output the grinding wheel state coefficient, and adjusts the grinding wheel speed according to the grinding wheel state coefficient;

[0066] The polishing state evaluation module builds a polishing state model based on the polishing state data and outputs the polishing state coefficient;

[0067] The grinding pressure assessment module constructs a grinding pressure assessment model based on the grinding state coefficient and the grinding wheel state coefficient, outputs the pressure coefficient, and compares it with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, it generates pressure adjustment information;

[0068] The pressure control module builds a pressure target model according to the current polishing pressure information and the pressure coefficient, outputs the target polishing pressure according to the pressure adjustment information, and adjusts the polishing pressure to the target polishing pressure.

[0069] Preferably, a grinding wheel state model is constructed based on the grinding wheel state data to output a grinding wheel state coefficient, and a specific method for adjusting the grinding wheel speed based on the grinding wheel state coefficient is as follows:

[0070] S201, constructing a grinding wheel state model, and normalizing the grinding wheel state data using the minimum-maximum normalization principle to obtain grinding wheel state index data, including grinding wheel vibration index, grinding wheel particle size index, and grinding wheel speed index;

[0071] S202, importing the grinding wheel state index data into the constructed grinding wheel state model to output the grinding wheel state coefficient;

[0072] S203, comparing the obtained grinding wheel state coefficient with a grinding wheel state coefficient threshold; if the grinding wheel state coefficient is outside the grinding wheel state coefficient threshold, importing the current grinding wheel speed and the grinding wheel state coefficient into a pre-established speed adjustment model to output a grinding wheel target speed, thereby adjusting the grinding wheel speed;

[0073] The grinding wheel state model is expressed as:

[0074]

[0075] in, Indicates the grinding wheel state coefficient, Indicates the matching strength between vibration and particle size (the larger the particle size, the lower the vibration tolerance), Indicates the synergy between vibration and speed (high speed requires lower vibration to maintain stability). Indicates the compatibility of particle size and rotation speed (coarse grinding wheels require low rotation speed to avoid overheating), is the weight coefficient and , The specific value of can be determined by weight distribution through historical data fitting or through expert experience;

[0076] in, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel speed index during the data acquisition period, is the square of the Pearson correlation coefficient between the grinding wheel grain size index and the grinding wheel speed index during the data acquisition period (the three are processed by squaring the Pearson correlation coefficient to eliminate the directionality and only retain the correlation strength, and the value range is , The closer to 1 the grinding wheel condition, the better)

[0077] The speed adjustment model is expressed as:

[0078]

[0079] in, Indicates the target speed, Indicates the current speed. Indicates the proportional coefficient (the proportional coefficient that controls the adjustment range of the grinding wheel speed and is used for the dynamic response of the grinding wheel state evaluation coefficient The deviation, The larger the speed, the greater the speed adjustment range and the faster the response. The smaller the speed, the more conservative the adjustment and the smoother the response. The specific value of can be calibrated by expert experience). Indicates the grinding wheel state coefficient, Indicates the ideal value of the grinding wheel condition coefficient (the average of the upper and lower limits of the grinding wheel condition coefficient).

[0080] In the present invention, an evaluation coefficient reflecting the real-time status of the grinding wheel is constructed based on the dynamic balance information, particle size, and rotation speed of the grinding wheel, and the grinding wheel rotation speed is dynamically adjusted to maintain stability. The comprehensive status of the grinding wheel is quantified through the synergistic relationship between parameters to avoid misjudgment caused by single parameter deviation. At the same time, it can suppress excessive vibration and extend the life of the grinding wheel.

[0081] Preferably, the step of obtaining the polishing state coefficient is:

[0082] A polishing state model is constructed based on the polishing state data, the polishing state data is imported into the constructed polishing state model, and the polishing state coefficient is output. The polishing state model is expressed as:

[0083]

[0084] in, Indicates the grinding state coefficient, Indicates the attenuation coefficient (control grinding state coefficient, The decay rate as a function of the velocity-temperature product, The larger it is, the more sensitive it is to the deterioration of working conditions. The smaller the working condition, the looser the assessment. The specific value of can be calibrated by expert experience). Indicates the travel speed, Indicates the temperature of rail 7, Indicates standard travel speed, Indicates standard temperature value.

[0085] In the present invention, the stability of the current grinding condition is evaluated based on the travel speed and the temperature of the rail 7. The larger the product, The smaller it is, the greater the risk of working condition deterioration, which can reduce the risk of rail phase change caused by high temperature and high speed.

[0086] Preferably, a grinding pressure evaluation model is constructed based on the grinding state coefficient and the grinding wheel state coefficient, and the pressure coefficient is output and compared with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, pressure adjustment information is generated. The grinding pressure evaluation model is expressed as:

[0087]

[0088]

[0089] in, represents the pressure coefficient, Represents the sensitivity adjustment factor (controls the slope of the logistic function and determines the pressure evaluation coefficient Sensitivity to input changes, The bigger, The steeper the function curve, Mutation near the threshold, The smaller it is, the flatter the function curve is and the more gradual the pressure adjustment is). Indicates the offset, Represents the weighted linear combination coefficient of the grinding wheel state coefficient and the grinding state coefficient, Indicates the grinding wheel state coefficient, Indicates the grinding state coefficient, represents the weight of the grinding wheel state coefficient and the grinding state coefficient and , The specific value of can be determined by weight distribution through historical data fitting or through expert experience.

[0090] Preferably, the pressure target model (using a complete continuous time domain formula of proportional-integral control (PI control)) is expressed as:

[0091]

[0092] Indicates the target grinding pressure, Indicates the current grinding pressure. , is the mean of the upper and lower limits of the pressure coefficient, represents the pressure coefficient, is the proportional gain coefficient (its function is to amplify the direct impact of the current deviation and quickly respond to pressure fluctuations. It can be calibrated through experiments or expert experience). is the integral gain coefficient (unit: 1 / second, its function is to eliminate historical accumulated deviations and suppress long-term steady-state errors, such as pressure decay caused by grinding wheel wear. Its physical meaning is that it indicates the sensitivity of the integral term to time. The larger the value, the stronger the influence of historical deviations).

[0093] In an embodiment of the present invention, the positioning mechanism and the locking mechanism can be used to achieve rapid positioning and firm fixation of the device, thereby improving the accuracy of the grinding trajectory. At the same time, during grinding, multiple modules can collaborate to collect grinding wheel status and grinding status data in real time, dynamically adjust parameters such as speed and pressure, and ensure the surface uniformity and smoothness of the rail waist. At the same time, based on the grinding wheel status model and the grinding status model, risks such as grinding wheel imbalance and overheating can be identified in advance, thereby extending the life of the grinding wheel and reducing maintenance costs.

[0094] See also Figures 1 to 4 As an embodiment of the present invention, the grinding mechanism 3 includes a grinding wheel 301 and a motor 302. The grinding wheel 301 is detachably connected to the output shaft of the motor 302 detachably mounted on a mounting frame 305. The mounting frame 305 is fixedly connected to a pressure sensor 304 fixedly mounted with a support arm 303. The other end of the support arm 303 is hinged to the chassis 1. The grinding mechanism 3 also includes:

[0095] A pushing assembly, mounted on the chassis 1, is used to push the support arm 303 to drive the grinding wheel 301 toward or away from the rail 7;

[0096] The pushing assembly includes an electric push rod B306, a push rod 307 and a hinged head 309. The electric push rod B306 is detachably connected to a mounting plate 308 fixedly mounted on the chassis 1. The hinged head 309 is mounted on the output shaft of the electric push rod B306. The hinged head 309 is hinged to the other end of the push rod 307 whose end is hinged on the support arm 303. The motor 302 pushes the grinding wheel 301 to rotate in the vertical direction. The electric push rod B306 pushes the hinged head 309 to push the push rod 307 to push the support arm 303 to drive the grinding wheel 301 to press against the waist of the rail 7. At this time, the electric push rod A2 pushes the chassis 1 to slide along the length of the rail 7, thereby achieving the technical effect of grinding the waist of the rail 7.

[0097] Preferably, the positioning mechanism 4 includes two sets of guide wheels 401, which are mounted at both ends of the chassis 1 and are rotatably connected to the chassis 1, and further includes:

[0098] The side positioning assembly 402 is symmetrically mounted on the chassis 1 and includes a push handle 4021 and a rod body 4023. The push handle 4021 is rotatably connected to a positioning shaft 4022 fixedly connected to the chassis 1. The rod body 4023 is fixedly connected to the end of the push handle 4021 and slides with a slide rail 4028 provided on the chassis 1. A sleeve 4024 is fixedly connected to the rod body 4023. The sleeve 4024 is fixedly connected to a frame 4025 fixedly connected to an elastic telescopic rod 4026. A positioning wheel 4027 is rotatably connected to the frame 4025. The chassis 1 is placed above the rail 7, and the two sets of guide wheels 401 can slide relative to the rail 7. At this time, pushing the push handle 4021 drives the rod body 4023 to slide along the slide rail 4028, prompting the positioning wheel 4027 to press against the waist of the rail 7, thereby limiting the chassis 1 while prompting the chassis 1 to slide relative to the length direction of the rail 7.

[0099] Preferably, the locking mechanism 6 includes a locking block 601, which is fixedly connected to the output shaft of the electric push rod A2 and has a locking plate 602 symmetrically slidably installed thereon. The locking block 601 is rotatably connected to a double-headed screw 603 threadedly connected to the locking plate 602. The locking block 601 is fixedly connected to a guide rod 605 for guiding the locking plate 602. The end of the double-headed screw 603 is fixedly connected to a crank 604, which can drive the double-headed screw 603 to rotate in the horizontal direction by pushing the crank 604, prompting the double-headed screw 603 to push the two locking plates 602 to perform linear motion in opposite directions of movement in the horizontal direction, thereby achieving the purpose of clamping or loosening the rail 7 using the two locking plates 602, and thereby achieving the technical effect of confining the electric push rod A2 to the rail 7 or releasing the confinement.

[0100] In the embodiment of the present invention, the double-headed screw 603 can be driven to rotate in the horizontal direction by pushing the crank 604, so that the double-headed screw 603 can push the two locking plates 602 to perform linear motion in the opposite direction of the horizontal movement, thereby achieving the purpose of clamping or loosening the rail 7 by using the two locking plates 602, thereby achieving the technical effect of limiting the electric push rod A2 on the rail 7 or releasing the limitation. The chassis 1 is placed above the rail 7, and the two sets of guide wheels 401 can slide relative to the rail 7. At this time, pushing the push handle 4021 drives the rod body 402 3 slides along the slide rail 4028, causing the positioning wheel 4027 to press against the waist of the rail 7, thereby limiting the position of the chassis 1 and causing the chassis 1 to slide relative to the length direction of the rail 7. Then, the motor 302 is used to drive the grinding wheel 301 to rotate in the vertical direction. The electric push rod B306 drives the hinged joint 309 to drive the push rod 307 to drive the support arm 303 to drive the grinding wheel 301 to press against the waist of the rail 7. At this time, the electric push rod A2 drives the chassis 1 to slide along the length of the rail 7, thereby achieving the technical effect of grinding the waist of the rail 7.

[0101] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0102] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A track frog welding auxiliary device for high-altitude cold areas, comprising a chassis and an electric push rod A mounted on the chassis, characterized in that: Also includes: The grinding mechanism is installed on the chassis and is used to grind the waist of the rail; The positioning mechanism is installed on the chassis and is used to guide the movement direction of the grinding mechanism; The locking mechanism is installed on the electric push rod A and is used to limit the electric push rod A to the rail; The control system is electrically connected to the controller installed on the electric push rod A, including: A data acquisition module is used to collect grinding wheel status data and grinding status data, wherein the grinding wheel status data includes grinding wheel vibration information, grinding wheel particle size and grinding wheel speed, and the grinding status data includes travel speed and rail temperature; The grinding wheel state evaluation module builds a grinding wheel state model based on the grinding wheel state data to output the grinding wheel state coefficient, and adjusts the grinding wheel speed according to the grinding wheel state coefficient; The polishing state evaluation module builds a polishing state model based on the polishing state data and outputs the polishing state coefficient; The grinding pressure assessment module constructs a grinding pressure assessment model based on the grinding state coefficient and the grinding wheel state coefficient, outputs the pressure coefficient, and compares it with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, it generates pressure adjustment information; The pressure control module builds a pressure target model based on the current grinding pressure information and the pressure coefficient, outputs the target grinding pressure according to the pressure adjustment information, and adjusts the grinding pressure to the target grinding pressure; The grinding wheel state model is constructed based on the grinding wheel state data to output the grinding wheel state coefficient. The specific method of adjusting the grinding wheel speed based on the grinding wheel state coefficient is as follows: S201, constructing a grinding wheel state model, and normalizing the grinding wheel state data using the minimum-maximum normalization principle to obtain grinding wheel state index data, including grinding wheel vibration index, grinding wheel particle size index, and grinding wheel speed index; S202, importing the grinding wheel state index data into the constructed grinding wheel state model to output the grinding wheel state coefficient; S203, comparing the obtained grinding wheel state coefficient with a grinding wheel state coefficient threshold; if the grinding wheel state coefficient is outside the grinding wheel state coefficient threshold, importing the current grinding wheel speed and the grinding wheel state coefficient into a pre-established speed adjustment model to output a grinding wheel target speed, thereby adjusting the grinding wheel speed; The grinding wheel state model is expressed as: in, Indicates the grinding wheel state coefficient, Indicates the matching strength between vibration and particle size, Indicates the synergy between vibration and speed, Indicates the adaptability of particle size and rotation speed, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel grain size index during the data acquisition period, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel speed index during the data acquisition period, is the square of the Pearson correlation coefficient between the grinding wheel grain size index and the grinding wheel speed index during the data acquisition period, is the weight coefficient and ; The speed adjustment model is expressed as: in, Indicates the target speed, Indicates the current speed. represents the proportionality coefficient, Indicates the grinding wheel state coefficient, Indicates the ideal value of the grinding wheel condition coefficient.

2. The track frog welding auxiliary device for high-cold areas according to claim 1, characterized in that: The steps for obtaining the polishing state coefficient are: A polishing state model is constructed based on the polishing state data, the polishing state data is imported into the constructed polishing state model, and the polishing state coefficient is output. The polishing state model is expressed as: in, Indicates the grinding state coefficient, represents the attenuation coefficient, Indicates the travel speed, represents the rail temperature, Indicates standard travel speed, Indicates standard temperature value.

3. The track frog welding auxiliary device for high-cold areas according to claim 2, characterized in that: A grinding pressure evaluation model is constructed based on the grinding state coefficient and the grinding wheel state coefficient, and the pressure coefficient is output and compared with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, pressure adjustment information is generated. The grinding pressure evaluation model is expressed as: in, represents the pressure coefficient, represents the sensitivity adjustment factor, Indicates the offset, Represents the weighted linear combination coefficient of the grinding wheel state coefficient and the grinding state coefficient, Indicates the grinding wheel state coefficient, Indicates the grinding state coefficient, represents the weight of the grinding wheel state coefficient and the grinding state coefficient and .

4. The track frog welding auxiliary device for high-cold areas according to claim 3, characterized in that: The pressure target model adopts the complete continuous time domain formula of proportional-integral control, which is expressed as: in, Indicates the target grinding pressure, Indicates the current grinding pressure. , is the mean of the upper and lower limits of the pressure coefficient, represents the pressure coefficient, is the proportional gain coefficient, is the integral gain coefficient.

5. The track frog welding auxiliary device for high-cold areas according to claim 1, characterized in that: The grinding mechanism includes a grinding wheel and a motor, wherein the grinding wheel is detachably connected to an output shaft of the motor detachably mounted on a mounting frame, wherein the mounting frame is fixedly connected to a pressure sensor fixedly mounted with a support arm, wherein the other end of the support arm is hinged to the chassis, and further includes: The pushing assembly is installed on the chassis and is used to push the support arm to drive the grinding wheel closer to or away from the rail.

6. The track frog welding auxiliary device for high-cold areas according to claim 5, characterized in that: The pushing assembly includes an electric push rod B, a push rod and a hinged head. The electric push rod B is detachably connected to a mounting plate fixedly mounted on the chassis. The hinged head is mounted on the output shaft of the electric push rod B. The hinged head is hinged to the other end of the push rod whose end is hinged to the support arm.

7. The track frog welding auxiliary device for high-cold areas according to claim 6, characterized in that: The positioning mechanism includes two sets of guide wheels, which are mounted at both ends of the chassis and are rotatably connected to the chassis, and further includes: The side positioning assembly is symmetrically installed on the chassis and includes a push handle and a rod body. The push handle is rotatably connected to the positioning shaft fixedly connected to the chassis. The rod body is fixedly connected to the end of the push handle and slidingly cooperates with the slide rail opened on the chassis. A sleeve is fixedly connected to the rod body, and the sleeve is fixedly connected to a frame fixedly connected to an elastic telescopic rod. A positioning wheel is rotatably connected to the frame.

8. The track frog welding auxiliary device for high-altitude and cold regions according to claim 1, characterized in that: The locking mechanism includes a locking block, which is fixedly connected to the output shaft of the electric push rod A and has a locking plate symmetrically slidably installed on it. A double-headed screw is rotatably connected to the locking block and is threadedly connected to the locking plate. A guide rod for guiding the locking plate is fixedly connected to the locking block, and a crank is fixedly connected to the end of the double-headed screw.

9. The operating method of the high-cold region rail frog welding auxiliary device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Use the locking mechanism to limit the electric push rod A to the rail, start the positioning mechanism to position the chassis, and start the grinding mechanism to grind the waist of the rail; S2, collecting grinding wheel state data and polishing state data, constructing a grinding wheel state model based on the grinding wheel state data to output a grinding wheel state coefficient, and adjusting the grinding wheel speed based on the grinding wheel state coefficient; S3. Build a grinding state model based on the grinding state data and output a grinding state coefficient. Build a grinding pressure assessment model based on the grinding state coefficient and the grinding wheel state coefficient and output a pressure coefficient. Compare the pressure coefficient with a pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, generate pressure adjustment information. S4. Constructing a pressure target model according to the current polishing pressure information and the pressure coefficient, outputting a target polishing pressure according to the pressure adjustment information, and adjusting the polishing pressure to the target polishing pressure.

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