Welding auxiliary device for rail frog in alpine region and operation method

Abstract

The invention discloses an alpine region track frog welding auxiliary device and an operation method, and belongs to the technical field of track welding, the alpine region track frog welding auxiliary device comprises a chassis and an electric push rod A mounted on the chassis, and further comprises a polishing mechanism, a positioning mechanism, a locking mechanism and a control system which are electrically connected with a controller mounted on the electric push rod A, and the alpine region track frog welding auxiliary device comprises a data acquisition module and a data processing module, the data acquisition module is used for acquiring grinding wheel state data and grinding state data; the grinding wheel state evaluation module adjusts the rotating speed of the grinding wheel; the polishing state evaluation module outputs a polishing state coefficient; the polishing pressure evaluation module is used for outputting a pressure coefficient and pressure adjustment information; the pressure regulation and control module is used for constructing a pressure target model according to the current polishing pressure information and the pressure coefficient, outputting target polishing pressure according to the pressure regulation information and regulating the polishing pressure to the target polishing pressure; according to the invention, the waist of the steel rail can be accurately polished before flash welding of the rail frog.

Description

Technical Field

[0001] The present invention belongs to the technical field of track welding, and particularly relates to an auxiliary device and an operation method for welding turnout in alpine regions. Background Art

[0002] In the flash welding process of turnout in alpine 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 the alpine environment, traditional grinding devices often face the following problems: Parameters such as the grinding wheel speed and grinding pressure are difficult to dynamically adjust in the low-temperature environment, resulting in uneven grinding or excessive wear, which affects the surface quality of the rail; Existing equipment lacks real-time comprehensive evaluation of the grinding wheel state (vibration, particle size, speed, etc.) and grinding conditions (travel speed, rail temperature, etc.), and it is difficult to prevent the risk of rail phase transformation caused by grinding wheel imbalance or high temperature and high speed.

[0003] In view of 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, so as to ensure the accuracy and reliability of rail waist grinding and provide a high-quality basis for subsequent flash welding. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an auxiliary device and an operation method for welding turnout in alpine regions, which solve the above problems.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An auxiliary device for welding turnout in alpine regions includes a chassis and an electric push rod A installed on the chassis, and further includes: A grinding mechanism installed on the chassis for grinding the rail waist; A positioning mechanism installed on the chassis for guiding the movement direction of the grinding mechanism; A locking mechanism installed on the electric push rod A for restricting the electric push rod A on the rail; A control system electrically connected to a controller installed on the electric push rod A, including: A data acquisition module for collecting grinding wheel state data and grinding state data. The grinding wheel state data includes grinding wheel vibration information, grinding wheel particle size, and grinding wheel speed, and the grinding state data includes travel speed and rail temperature; A grinding wheel state evaluation module for 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 according to the grinding wheel state coefficient; A grinding state evaluation module for constructing a grinding state model based on the grinding state data to output a grinding state coefficient; The grinding pressure evaluation module constructs a grinding pressure evaluation 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, pressure adjustment information is formed. The pressure control module constructs 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.

[0006] Based on the above technical solutions, the present invention also provides the following optional technical solutions: Further technical solution: The specific method of constructing a grinding wheel state model based on the grinding wheel state data and outputting the grinding wheel state coefficient, and adjusting the grinding wheel speed according to the grinding wheel state coefficient is as follows: S201. Construct a grinding wheel state model, and use the minimum-maximum normalization principle to normalize the grinding wheel state data to obtain grinding wheel state index data, including the grinding wheel vibration index, the grinding wheel particle size index, and the grinding wheel speed index. S202. Import the grinding wheel state index data into the constructed grinding wheel state model to output the grinding wheel state coefficient. S203. Compare the obtained grinding wheel state coefficient with the grinding wheel state coefficient threshold. If the grinding wheel state coefficient is outside the grinding wheel state coefficient threshold, import the current grinding wheel speed and the grinding wheel state coefficient into the pre-constructed speed adjustment model to output the target grinding wheel speed, and then adjust the grinding wheel speed. The grinding wheel state model is expressed as:

[0007] Among them, represents the grinding wheel state coefficient, represents the matching strength between vibration and particle size, represents the coordination between vibration and speed, represents the adaptability between particle size and speed, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel particle size index within the data acquisition period of the grinding wheel, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel speed index within the data acquisition period of the grinding wheel, is the square of the Pearson correlation coefficient between the grinding wheel particle size index and the grinding wheel speed index within the data acquisition period of the grinding wheel, is the weight coefficient and ; The speed adjustment model is expressed as:

[0008] Among them, represents the target speed, Indicates the current rotational speed, Indicates the proportionality coefficient, Indicates the grinding wheel state coefficient, Indicates the ideal value of the grinding wheel state coefficient.

[0009] Further technical solution: The steps for obtaining the grinding state coefficient are as follows: Construct a grinding state model based on the grinding state data, import the grinding state data into the constructed grinding state model, and output the grinding state coefficient. The grinding state model is expressed as:

[0010] Wherein, Indicates the grinding state coefficient, Indicates the attenuation coefficient, Indicates the traveling speed, Indicates the rail temperature, Indicates the standard traveling speed, Indicates the standard temperature value.

[0011] Further technical solution: Construct a grinding pressure evaluation model based on the grinding state coefficient and the grinding wheel state coefficient, output the pressure coefficient, and compare it with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, pressure adjustment information is formed. The grinding pressure evaluation model is expressed as:

[0012]

[0013] Wherein, Indicates the pressure coefficient, Indicates the sensitivity adjustment factor, Indicates the offset, Indicates 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, Indicates the weights of the grinding wheel state coefficient and the grinding state coefficient and .

[0014] Further technical solution: The pressure target model adopts the complete continuous time domain formula of proportional-integral control, expressed as:

[0015] Wherein, Indicates the target grinding pressure, Indicates the current grinding pressure, , Is the mean value of the upper limit and the lower limit of the pressure coefficient, represents the pressure coefficient, is the proportional gain coefficient, is the integral gain coefficient.

[0016] 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 installed on the mounting frame. The mounting frame is fixedly connected to a pressure sensor fixedly installed with a support arm. The other end of the support arm is hinged to the chassis. It further includes: A pushing component, installed on the chassis, for pushing the support arm to drive the grinding wheel to approach or move away from the rail.

[0017] Further technical solution: The pushing component includes an electric push rod B, a push rod and a hinge joint. The electric push rod B is detachably connected to the mounting plate fixedly installed on the chassis. The hinge joint is installed on the output shaft of the electric push rod B. The hinge joint is hinged to the other end of the push rod whose end is hinged to the support arm.

[0018] Further technical solution: The positioning mechanism includes two groups of guide wheels. The two groups of guide wheels are installed at both ends of the chassis and are rotatably connected to the chassis. It further includes: A side positioning component, symmetrically installed on the chassis, including 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 is slidably matched with the slide rail opened on the chassis. A sleeve is fixedly connected to the rod body. The sleeve is fixedly connected to a frame fixedly connected with an elastic telescopic rod. A positioning wheel is rotatably connected to the frame.

[0019] Further technical solution: The locking mechanism includes a lock block. The lock block is fixedly connected to the output shaft of the electric push rod A and symmetrically slidably installed with lock plates on it. A double-headed screw rod threadedly connected to the lock plates is rotatably connected to the lock block. A guide rod for guiding the lock plates is fixedly connected to the lock block. A crank is fixedly connected to the end of the double-headed screw rod.

[0020] An operation method of a welding auxiliary device for railway switches in alpine regions includes the following steps: S1. Use the locking mechanism to limit the electric push rod A on the rail, start the positioning mechanism to position the chassis, and at the same time start the grinding mechanism to grind the waist of the rail; S2. Collect the grinding wheel state data and the grinding state data, construct a grinding wheel state model according to the grinding wheel state data to output the grinding wheel state coefficient, and adjust the grinding wheel speed according to the grinding wheel state coefficient; S3. Construct a grinding state model based on the grinding state data to output a grinding state coefficient. Construct a grinding pressure evaluation model based on the grinding state coefficient and the grinding wheel state coefficient, output a pressure coefficient, and compare it with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, pressure adjustment information is formed. S4. Construct a pressure target model based on the current grinding pressure information and the pressure coefficient, output a target grinding pressure according to the pressure adjustment information, and adjust the grinding pressure to the target grinding pressure.

[0021] The present invention provides an auxiliary device and an operation method for welding a track frog in alpine regions, and has the following beneficial effects compared with the prior art: 1. Through the guide wheel, the side positioning component and the locking mechanism, the present invention realizes the rapid positioning and firm fixation of the device, improves the accuracy of the grinding track. At the same time, during grinding, through the cooperation of multiple modules, the grinding wheel state and the grinding state data are collected in real time, and parameters such as the rotation speed and pressure are dynamically adjusted to ensure the uniformity and smoothness of the surface of the rail waist. At the same time, based on the grinding wheel state model and the grinding state model, risks such as grinding wheel imbalance and overheating can be identified in advance, the service life of the grinding wheel can be extended, and the maintenance cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the grinding mechanism in the present invention.

[0024] Figure 3 It is a structural schematic diagram of the side positioning component in the present invention.

[0025] Figure 4 It is a structural schematic diagram of the locking mechanism in the present invention.

[0026] Annotation of reference numerals: 1. Chassis; 2. Electric push rod A; 3. Grinding mechanism; 301. Grinding wheel; 302. Motor; 303. Support arm; 304. Pressure sensor; 305. Mounting frame; 306. Electric push rod B; 307. Push rod; 308. Mounting plate; 309. Hinge joint; 4. Positioning mechanism; 401. Guide wheel; 402. Side positioning component; 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. Lock block; 602. Lock plate; 603. Double-headed lead screw; 604. Crank; 605. Guide rod; 7. Rail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, 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 used to limit the present invention.

[0028] The following describes in detail the specific implementation of the present invention in combination with specific embodiments.

[0029] Please refer to Figure 1 , an auxiliary device for welding railway switches in alpine regions provided by an embodiment of the present invention, includes a chassis 1 and an electric push rod A2 installed on the chassis 1, and further includes: A grinding mechanism 3, installed on the chassis 1, for grinding the waist of the rail 7; A positioning mechanism 4, installed on the chassis 1, for guiding the movement direction of the grinding mechanism 3; A locking mechanism 6, installed on the electric push rod A2, for restricting the electric push rod A2 on the rail 7; A control system, electrically connected to a controller 5 installed on the electric push rod A2, includes: A data acquisition module, for acquiring grinding wheel state data and grinding state data. The grinding wheel state data includes grinding wheel vibration information (used to measure the dynamic balance information of the grinding wheel), grinding wheel particle size, and grinding wheel rotation speed. The grinding state data includes traveling speed and rail 7 temperature; A grinding wheel state evaluation module, 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 rotation speed according to the grinding wheel state coefficient; A grinding state evaluation module, constructing a grinding state model based on the grinding state data to output a grinding state coefficient; A grinding pressure evaluation module, constructing a grinding pressure evaluation model based on the grinding state coefficient and the grinding wheel state coefficient and outputting a pressure coefficient, and comparing it with a pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, a pressure adjustment message is formed; A pressure control module, constructing a pressure target model based on the current grinding pressure information and the pressure coefficient, and outputting a target grinding pressure according to the pressure adjustment message, and adjusting the grinding pressure to the target grinding pressure.

[0030] Preferably, the specific method of 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 rotation speed according to the grinding wheel state coefficient is as follows: S201. Construct a grinding wheel state model, and perform normalization processing on the grinding wheel state data using the minimum-maximum normalization principle to obtain grinding wheel state index data, including a grinding wheel vibration index, a grinding wheel particle size index, and a grinding wheel rotation speed index; S202. Import the grinding wheel status index data into the constructed grinding wheel status model to output the grinding wheel status coefficient; S203. Compare the obtained grinding wheel status coefficient with the grinding wheel status coefficient threshold. If the grinding wheel status coefficient is outside the grinding wheel status coefficient threshold, import the current grinding wheel speed and the grinding wheel status coefficient into the pre-constructed speed adjustment model to output the target grinding wheel speed, and then adjust the grinding wheel speed; The grinding wheel status model is expressed as:

[0031] Where, represents the grinding wheel status coefficient, represents the matching strength between vibration and particle size (the larger the particle size, the lower the vibration tolerance), represents the synergy between vibration and speed (higher speed requires lower vibration to maintain stability), represents the adaptability between particle size and speed (coarse grinding wheel requires low speed to avoid overheating), is the weight coefficient and , The specific value of can be determined by fitting historical data to determine the weight distribution or by expert experience; Where, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel speed index within the data acquisition period of the grinding wheel, is the square of the Pearson correlation coefficient between the grinding wheel particle size index and the grinding wheel speed index within the data acquisition period of the grinding wheel (the three eliminate the directionality by squaring the Pearson correlation coefficient, only retaining the correlation strength, and the value range is , The closer is to 1, the better the grinding wheel status) The speed adjustment model is expressed as:

[0032] Where, represents the target speed, represents the current speed, represents the proportional coefficient (the proportional coefficient that controls the adjustment range of the grinding wheel speed, used to dynamically respond to the deviation of the grinding wheel status evaluation coefficient , The larger, the greater the speed adjustment range and the faster the response, The smaller, the more conservative the speed adjustment and the smoother the response, The specific value of can be calibrated by expert experience values), represents the grinding wheel status coefficient, represents the ideal value of the grinding wheel status coefficient (the average of the upper limit value and the lower limit value of the grinding wheel status coefficient).

[0033] In the present invention, an evaluation coefficient reflecting the real-time state of the grinding wheel is constructed based on the dynamic balance information, particle size, and rotational speed of the grinding wheel, and the rotational speed of the grinding wheel is dynamically adjusted to maintain stability. The comprehensive state of the grinding wheel is quantified through the synergistic relationship between parameters, avoiding misjudgment caused by deviation of a single parameter. At the same time, it can suppress excessive vibration and extend the service life of the grinding wheel.

[0034] Preferably, the steps for obtaining the grinding state coefficient are as follows: Construct a grinding state model based on the grinding state data, import the grinding state data into the constructed grinding state model, and output the grinding state coefficient. The grinding state model is expressed as:

[0035] Wherein, represents the grinding state coefficient, represents the attenuation coefficient (controlling the grinding state coefficient, the attenuation rate varying with the product of speed and temperature, the larger it is, the more sensitive to the deterioration of the working condition, the smaller it is, the looser the working condition evaluation, the specific value of which can be calibrated by expert experience values), represents the traveling speed, represents the temperature of the rail 7, represents the standard traveling speed, represents the standard temperature value.

[0036] In the present invention, based on the traveling speed and the temperature of the rail 7, the stability of the current grinding working condition is evaluated. The larger the product, the smaller it is, indicating a greater risk of deterioration of the working condition, and it can reduce the risk of phase transformation of the rail 7 caused by high temperature and high speed.

[0037] Preferably, a grinding pressure evaluation model is constructed based on the grinding state coefficient and the grinding wheel state coefficient, and a 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 formed. The grinding pressure evaluation model is expressed as:

[0038]

[0039] Wherein, represents the pressure coefficient, represents the sensitivity adjustment factor (controlling the slope of the logistic function and determining the sensitivity of the pressure evaluation coefficient to the input change, the larger it is, the steeper the function curve, mutating near the threshold, The smaller it is, the flatter the function curve is, and the more gradual the pressure adjustment is), represents the offset, represents the weighted linear combination coefficient of the grinding wheel state coefficient and the grinding state coefficient, represents the grinding wheel state coefficient, represents the grinding state coefficient, represents the weights of the grinding wheel state coefficient and the grinding state coefficient and , The specific value of can be determined by fitting historical data to determine the weight distribution or determined by expert experience.

[0040] Preferably, the pressure target model (using the complete continuous-time domain formula of proportional-integral control (PI control)) is expressed as:

[0041] represents the target grinding pressure, represents the current grinding pressure, , is the mean value of the upper limit value and the lower limit value of the pressure coefficient, represents the pressure coefficient, is the proportional gain coefficient (the function is to amplify the direct influence of the current deviation, quickly respond to pressure fluctuations, and can be calibrated through experiments or expert experience), is the integral gain coefficient (unit 1 / second, the function is to eliminate the historical cumulative deviation and suppress the long-term steady-state error, such as the pressure attenuation caused by the wear of the grinding wheel. Its physical meaning is that it represents the sensitivity of the integral term to time. The larger the value, the stronger the influence of the historical deviation).

[0042] In the embodiment of the present invention, the device can be quickly positioned and firmly fixed through the positioning mechanism and the locking mechanism, improving the accuracy of the grinding trajectory. At the same time, during grinding, through the cooperation of multiple modules, the data of the grinding wheel state and the grinding state are collected in real time, and parameters such as the rotation speed and pressure are dynamically adjusted to ensure the uniformity and smoothness of the surface of the rail waist. At the same time, based on the grinding wheel state model and the grinding state model, risks such as grinding wheel imbalance and overheating can be identified in advance, extending the service life of the grinding wheel and reducing the maintenance cost.

[0043] Please refer to 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 installed on the mounting frame 305. The mounting frame 305 is fixedly connected to the pressure sensor 304 fixedly installed with the support arm 303. The other end of the support arm 303 is hinged to the chassis 1, and further includes: The pushing component is installed on the chassis 1 and is used to push the support arm 303 to drive the grinding wheel 301 to approach or move away from the rail 7. The pushing component includes an electric push rod B306, a push rod 307, and a hinge joint 309. The electric push rod B306 is detachably connected to the mounting plate 308 fixedly installed on the chassis 1. The hinge joint 309 is installed on the output shaft of the electric push rod B306. The hinge joint 309 is hinged to the other end of the push rod 307 whose end is hinged on the support arm 303. The motor 302 drives the grinding wheel 301 to rotate in the vertical direction. The electric push rod B306 pushes the hinge joint 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.

[0044] Preferably, the positioning mechanism 4 includes two sets of guide wheels 401. The two sets of guide wheels 401 are installed at both ends of the chassis 1 and are rotatably connected to the chassis 1. It further includes: The side positioning component 402 is symmetrically installed on the chassis 1 and includes a push handle 4021 and a rod body 4023. The push handle 4021 is rotatably connected to the 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 is slidably matched with the slide rail 4028 opened on the chassis 1. A sleeve 4024 is fixedly connected to the rod body 4023. The sleeve 4024 is fixedly connected to the frame 4025 fixedly connected with the elastic telescopic rod 4026. A positioning wheel 4027 is rotatably connected to the frame 4025. When the chassis 1 is placed above the rail 7, 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, causing the positioning wheel 4027 to press against the waist of the rail 7, achieving the purpose of limiting the chassis 1 and at the same time enabling the chassis 1 to slide relative to the length direction of the rail 7.

[0045] Preferably, the locking mechanism 6 includes a lock block 601. The lock block 601 is fixedly connected to the output shaft of the electric push rod A2, and two lock plates 602 are symmetrically and slidably installed thereon. A double-headed screw rod 603 threadedly connected to the lock plates 602 is rotatably connected to the lock block 601. A guide rod 605 for guiding the lock plates 602 is fixedly connected to the lock block 601. The end of the double-headed screw rod 603 is fixedly connected with a crank 604. By pushing the crank 604, the double-headed screw rod 603 can be driven to rotate in the horizontal direction, causing the double-headed screw rod 603 to push the two lock plates 602 to perform a linear motion with opposite horizontal movement directions, thereby achieving the purpose of clamping or loosening the rail 7 with the two lock plates 602, and further achieving the technical effect of limiting the electric push rod A2 on the rail 7 or releasing the limitation.

[0046] In the embodiment of the present invention, the hand crank 604 can be pushed to drive the double-headed lead screw 603 to rotate in the horizontal direction, so as to cause the double-headed lead screw 603 to push the two locking plates 602 to perform linear motions with opposite directions in the horizontal direction, thereby achieving the purpose of clamping or loosening the rail 7 by using the two locking plates 602, and further achieving the technical effect of restricting or releasing the restriction of the electric push rod A2 on the rail 7. The chassis 1 is placed above the rail 7, and the two groups 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, so that the positioning wheel 4027 presses against the waist of the rail 7, realizing the limit of the chassis 1 and at the same time enabling the chassis 1 to slide relative to the length direction of the rail 7. Furthermore, the motor 302 is used to drive the grinding wheel 301 to rotate in the vertical direction, and the electric push rod B306 pushes the hinge joint 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.

[0047] It should be noted that in this article, relational terms such as first and second are only used 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 "include", "comprise" or any other variant thereof are intended to cover non-exclusively, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A track frog welding auxiliary device for high-cold areas, comprising a chassis and an electric push rod A installed 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; A locking mechanism is installed on the electric push rod A and is used to limit the electric push rod A on the rail; The control system is electrically connected to the controller installed on the electric push rod A, and includes: A data acquisition module, 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 constructs 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 based on the grinding wheel state coefficient; A grinding state evaluation module constructs a grinding state model based on the grinding state data and outputs a grinding state coefficient; The grinding pressure evaluation module constructs a grinding pressure evaluation model based on the grinding state coefficient and the grinding wheel state coefficient and outputs the pressure coefficient and compares it with the pressure coefficient threshold. If the pressure coefficient is not within the pressure coefficient threshold, pressure adjustment information is generated. The pressure control module constructs a pressure target model according to 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.

2. The track frog welding auxiliary device for high-cold areas according to claim 1 is characterized in that: According to the grinding wheel state data, the grinding wheel state model is constructed to output the grinding wheel state coefficient. The specific method of adjusting the grinding wheel speed according to 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 a grinding wheel vibration index, a grinding wheel particle size index, and a grinding wheel rotation 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 the 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 speed adjustment model constructed in advance to output the grinding wheel target speed, and then adjusting the grinding wheel speed; The grinding wheel state model is expressed as: in, Indicates the grinding wheel state coefficient, represents the matching strength between vibration and particle size, Indicates the synergy between vibration and speed. Indicates the compatibility 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 collection period, is the square of the Pearson correlation coefficient between the grinding wheel vibration index and the grinding wheel speed index during the data collection 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 collection 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.

3. The track frog welding auxiliary device for high-cold areas according to claim 2 is characterized in that: The steps for obtaining the grinding state coefficient are: A polishing state model is constructed according to the polishing state data, the polishing state data is imported into the constructed polishing state model, and a 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 the standard travel speed. Indicates standard temperature value.

4. The track frog welding auxiliary device for high-cold areas according to claim 3 is 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 formed. 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 .

5. The track frog welding auxiliary device for high-cold areas according to claim 4 is 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 average of the upper and lower limits of the pressure coefficient, represents the pressure coefficient, is the proportional gain coefficient, is the integral gain coefficient.

6. 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 on the chassis, and further includes: The pushing assembly is installed on the chassis and is used to push the supporting arm to drive the grinding wheel closer to or away from the rail.

7. The track frog welding auxiliary device for high-cold areas according to claim 1 is 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 a chassis. The hinged head is mounted on an 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 on a support arm.

8. The track frog welding auxiliary device for high-cold areas according to claim 7, 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 also 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 a positioning shaft fixedly connected to the chassis, the rod body is fixedly connected to the end of the push handle and slidably cooperates with a 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, and a positioning wheel is rotatably connected to the frame.

9. The track frog welding auxiliary device for high-cold areas 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 mounted thereon; 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.

10. The operating method of the high-cold area rail frog welding auxiliary device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Use the locking mechanism to limit the electric push rod A on 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 grinding state data, constructing a grinding wheel state model according to the grinding wheel state data to output a grinding wheel state coefficient, and adjusting the grinding wheel speed according to the grinding wheel state coefficient; S3, constructing a grinding state model according to the grinding state data and outputting a grinding state coefficient, constructing a grinding pressure evaluation model according to the grinding state coefficient and the grinding wheel state coefficient and outputting a pressure coefficient and comparing it with a pressure coefficient threshold, and forming pressure adjustment information if the pressure coefficient is not within the pressure coefficient threshold; S4. Construct a pressure target model according to the current polishing pressure information and the pressure coefficient, output the target polishing pressure according to the pressure adjustment information, and adjust the polishing pressure to the target polishing pressure.

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