CN117403489A - Rapid tool setting method and system for automatic grinding of steel rail welding seams - Google Patents
Rapid tool setting method and system for automatic grinding of steel rail welding seams Download PDFInfo
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- CN117403489A CN117403489A CN202311194692.3A CN202311194692A CN117403489A CN 117403489 A CN117403489 A CN 117403489A CN 202311194692 A CN202311194692 A CN 202311194692A CN 117403489 A CN117403489 A CN 117403489A
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- 238000000034 method Methods 0.000 title claims abstract description 84
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 68
- 239000010959 steel Substances 0.000 title claims abstract description 68
- 238000003466 welding Methods 0.000 title claims abstract description 24
- 238000005498 polishing Methods 0.000 claims abstract description 88
- 230000008569 process Effects 0.000 claims abstract description 47
- 230000008859 change Effects 0.000 claims abstract description 12
- 238000007517 polishing process Methods 0.000 claims abstract description 7
- 238000004590 computer program Methods 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 6
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- 238000012937 correction Methods 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
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- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
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- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention relates to a rapid tool setting method and a rapid tool setting system for automatic grinding of a steel rail welding seam, wherein the method comprises the following steps: before polishing, feeding the grinding wheel to the steel rail under the condition that the grinding wheel does not rotate, recording the position of a feeding motor of polishing equipment in the feeding process and current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold value from the recorded data, and determining a rough polishing reference by taking the position as a reference, namely, realizing rough tool setting of the polishing reference; in the polishing process, under the condition that the grinding wheel rotates, the position of the coarse tool setting is used as a starting point of the precise tool setting, the grinding wheel is fed towards the steel rail, the contact condition of the grinding wheel and the steel rail is judged in real time by analyzing the current change of the polishing motor, and the precise tool setting of the polishing reference is realized. The invention constructs an automatic tool setting method based on coarse tool setting and precise tool setting, and can convert the manual tool setting process into an automatic tool setting process.
Description
Technical Field
The invention relates to the technical field of automatic steel rail grinding, in particular to a rapid tool setting method and a rapid tool setting system for automatic steel rail welding seam grinding.
Background
With the increase of railway operation mileage and transportation density, the more frequently old steel rails and switches are replaced. When the steel rail is replaced, the steel rail needs to be welded on line. At present, online steel rail welding is mostly treated by thermite welding, and the welding seams left after welding are mostly polished manually by using a profiling polisher.
The welding seam polishing operation mode is completely dependent on manual work. With the continuous occurrence of the conditions that old and new technicians retire and new workers reject heavy manual labor, the existing pain points which depend on manpower experience, have low efficiency and unstable effect are continuously aggravated, so that the market is in urgent need of equipment capable of automatically polishing the steel rail welding seams.
One key technology to be solved by automatic polishing of welding seams is how to realize an automatic, rapid and accurate tool setting process, which is used for converting the original tool setting process relying on touch sense and vision manually into an automatic tool setting process.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that when the grinding of the steel rail welding seam is changed from manual operation to automatic operation, the grinding reference is lost.
In order to solve the technical problems, the invention provides a rapid tool setting method for automatically polishing a steel rail welding seam, which comprises the following steps:
before polishing, feeding the grinding wheel towards a rail under the condition that the grinding wheel of the polishing equipment does not rotate, recording the position of a feeding motor of the polishing equipment in the feeding process and current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold according to the recorded data, and determining a rough polishing reference by taking the position as a reference to realize rough tool setting of the polishing reference;
in the polishing process, under the condition that the grinding wheel rotates, the grinding wheel is fed towards the steel rail by taking the position of the coarse tool setting as a starting point of the precise tool setting, and the contact condition of the grinding wheel and the steel rail is judged in real time by analyzing the current change of the polishing motor, so that the precise tool setting of a polishing reference is realized, and the precise tool setting of the polishing reference is realized;
the grinding motor is used for driving the grinding wheel to rotate, and the feeding motor is used for driving the grinding wheel to axially advance.
In one embodiment of the present invention, before polishing, under the condition that a grinding wheel of a polishing device does not rotate, the grinding wheel is fed towards a rail, the position of a feeding motor of the polishing device in the feeding process and current data of the feeding motor in the feeding process are recorded in real time, a position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold value is found out according to the recorded data, and a rough polishing reference is determined based on the position, so that rough tool setting of the polishing reference is realized, and the method includes:
s11: checking and ensuring that the grinding motor is in a stop state, and simultaneously, the grinding wheel is right above the steel rail;
s12: setting a first target speed of the feeding motor for driving the feeding shaft to axially move, wherein the target position is a forward maximum position, and the forward maximum position is a position of the feeding shaft which axially moves to the farthest position under the steel rail;
s13: when the feeding shaft moves axially towards the right lower part of the steel rail, a timer for recording data is started at the same time, and the position of the feeding motor and the current of the feeding motor are recorded;
s14: stopping recording data after the feeding shaft moves axially to the target position, and extracting low-frequency current data below AHz from the recorded feeding motor current;
s15: finding out the characteristic that the current exceeds a set threshold value from the low-frequency current data below AHz, finding out the corresponding position of the grinding wheel, which collides with the steel rail, in the recorded feeding motor position data, and recording as X_0, wherein the characteristic that the current exceeds the set threshold value is the current change generated when the grinding wheel collides with the steel rail;
s16: and (3) taking X_0 as a reference and biasing a millimeter in a direction away from the steel rail to obtain X_0-a, and moving a feed shaft of a feed motor to the X_0-a position to finish rough tool setting of a grinding reference.
In one embodiment of the invention, the extracting AHz of the following current data from the recorded feed motor current includes: current data below 10Hz is extracted from the recorded feed motor current by a low pass filtering algorithm.
In one embodiment of the present invention, the first target speed has a value in the range of 30-60mm/s.
In one embodiment of the invention, the timing frequency of the timer is greater than or equal to 500Hz.
In one embodiment of the present invention, in the polishing process, under the condition of rotation of the grinding wheel, the position of the coarse tool setting is used as a starting point of accurate tool setting, the grinding wheel is fed towards the steel rail, and the contact condition of the grinding wheel and the steel rail is judged in real time by analyzing the current change of the polishing motor, so as to realize accurate tool setting of a polishing reference, and the method includes:
s21: setting a second target speed of the feeding motor for driving the feeding shaft to axially move by taking the feeding motor at the position X_0-a as an accurate tool setting starting point, wherein the target position is a forward maximum position, simultaneously starting main shaft current acquisition of the grinding motor, and extracting data below BHz in real time;
s22: starting a polishing motor and waiting for the polishing motor to reach a target rotating speed;
s23: when the polishing motor reaches the target rotating speed, the feeding shaft axially moves;
s24: judging whether the data below the main shaft current BHz of the grinding motor exceeds C of the idle current, if so, stopping axial movement of the feed shaft, finishing accurate correction of the grinding wheel, and realizing accurate tool setting of a grinding reference; if the main shaft current of the grinding motor cannot be detected to exceed the idling current until the feeding shaft moves to the position of the maximum forward direction, the grinding equipment is abnormal, wherein the idling current is the current in the state of not cutting when the grinding wheel idles, and the value range of C% is 15-20%.
In one embodiment of the present invention, the second target speed has a value in the range of 2-3mm/s.
In order to solve the technical problems, the invention provides a rapid tool setting system for automatically polishing a steel rail welding seam, which comprises the following components:
the rough tool setting module is used for feeding the grinding wheel towards the rail under the condition that the grinding wheel of the grinding equipment does not rotate before grinding, recording the position of the feeding motor of the grinding equipment in the feeding process and the current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold value according to the recorded data, and determining a rough grinding reference by taking the position as the reference to realize rough tool setting of the grinding reference;
the accurate tool setting module is used for feeding the grinding wheel towards the steel rail by taking the position of the coarse tool setting as a starting point of accurate tool setting in the grinding process and judging the contact condition of the grinding wheel and the steel rail in real time by analyzing the current change of the grinding motor, so that the accurate tool setting of a grinding reference is realized and the accurate tool setting of the grinding reference is realized;
the grinding motor is used for driving the grinding wheel to rotate, and the feeding motor is used for driving the grinding wheel to axially feed.
In order to solve the technical problems, the invention provides electronic equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the steps of the rapid tool setting method for automatically polishing the steel rail weld joint are realized when the processor executes the computer program.
To solve the above technical problem, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the rapid tool setting method for automatic grinding of rail welds as described above.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the rough reference for polishing is found by using the rough tool setting once before polishing; then taking the found rough reference as a starting point of accurate tool setting to finish accurate tool setting, returning the grinding wheel to the rough reference position after finishing polishing of the angle, adjusting the grinding wheel to a next target angle, and then carrying out accurate tool setting under the next target angle, and repeating the process until finishing polishing of the whole rail head;
the invention constructs an automatic tool setting method based on coarse tool setting and precise tool setting, creatively converts the manual tool setting process into the automatic tool setting process, ensures that the steel rail welding seam polishing is more accurate and effective, improves the steel rail welding seam polishing efficiency, and can be widely popularized.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a flow chart of a rough tool setting method in an embodiment of the invention;
FIG. 3 is a flow chart of a precision tool setting method in an embodiment of the invention;
FIG. 4 is a schematic diagram of the current flow of a grinding motor in accordance with an embodiment of the present invention;
fig. 5 is a schematic view of a portion of the current flow for a grinding motor in accordance with an embodiment of the invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
Referring to fig. 1, the invention relates to a rapid tool setting method for automatically grinding a steel rail welding seam, which comprises the following steps:
before polishing, feeding the grinding wheel towards a rail under the condition that the grinding wheel of the polishing equipment does not rotate, recording the position of a feeding motor of the polishing equipment in the feeding process and current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold according to the recorded data, and determining a rough polishing reference by taking the position as a reference to realize rough tool setting of the polishing reference;
in the polishing process, under the condition that the grinding wheel rotates, the grinding wheel is fed towards the steel rail by taking the position of the coarse tool setting as a starting point of the precise tool setting, and the contact condition of the grinding wheel and the steel rail is judged in real time by analyzing the current change of the polishing motor, so that the precise tool setting of a polishing reference is realized, and the precise tool setting of the polishing reference is realized;
the grinding motor is used for driving the grinding wheel to rotate, and the feeding motor is used for driving the grinding wheel to axially advance.
It should be noted that this embodiment finally polishes the rail weld, but in the rapid tool setting process, the rail is rapidly set.
The invention constructs an automatic tool setting method based on coarse tool setting and precise tool setting, can convert the manual tool setting process into the automatic tool setting process, ensures that the steel rail welding seam polishing is more accurate and effective, and improves the steel rail welding seam polishing efficiency.
The present embodiment is described in detail below:
the polishing equipment for the steel rail welding seams in the embodiment mainly comprises: the device comprises a polishing module, a feeding module, a reciprocating module, a swing angle module and a control module. The polishing module consists of a polishing motor, a grinding wheel and the like, and the polishing motor drives the grinding wheel to rotate so as to provide cutting power; the feeding module consists of a feeding motor, a transmission mechanism (a screw rod, a nut and the like), a feeding shaft and the like (the feeding motor controls the feeding shaft to realize axial displacement through the transmission mechanism) and is used for realizing axial feeding movement of the grinding wheel; the reciprocating module mainly comprises a reciprocating motor, a guide rod and a synchronous belt and is used for realizing the reciprocating motion of the grinding wheel along the direction of the steel rail; the swing angle module mainly comprises a swing angle motor and a speed reducer and is used for realizing the swing angle of the grinding wheel so as to finish polishing at different angles. Because the polishing equipment is in the prior art and the structures are basically different, details of the polishing equipment in this embodiment are not described again.
In the tool setting method in this embodiment, features are required to be extracted from the currents of the feed motor and the grinding motor to determine the contact condition of the grinding wheel and the steel rail, so that the control module is required to be capable of reading the currents from the driver of the motor or the control system has the capability of collecting the motor currents. To achieve higher precision tool setting, the higher the sampling frequency, the better.
Coarse tool setting process
Please refer to fig. 1, which illustrates a rough tool setting process according to the present embodiment, wherein the process is used for achieving a rapid rough calibration of a polishing reference before polishing. The process simulates the condition that the grinding wheel is manually and rapidly fed under the condition that the grinding wheel does not rotate in the using process of the existing welding seam grinding machine, and the contact condition of the grinding wheel and the steel rail is judged through hand feeling, so that coarse calibration of a grinding reference is realized. The method specifically comprises the following steps:
s11: checking and ensuring that the grinding motor is in a stop state before rough cutting, and ensuring that the grinding wheel is directly above the steel rail (namely directly above the contact surface of the train wheel and the steel rail) and ensuring that the grinding wheel and the steel rail are in a non-contact state. The grinding wheel in the embodiment is located at a zero position (namely, the feeding shaft is located at the zero position), the grinding wheel is used for guaranteeing that the grinding wheel is separated from the steel rail, and the grinding wheel can be fed right below, in short, the grinding wheel and the steel rail are checked to be in a non-contact state.
S12: the range of the first target speed of the feed shaft is set to be 30-60mm/s, the preferred range of the first target speed of the feed shaft is 50mm/s, the target position is a forward maximum position (forward direction is the direction close to the steel rail), the forward maximum position is a position where the feed shaft moves axially to the farthest position (soft limit) under the steel rail, and the step is to ensure that the feed shaft is moved down and the grinding wheel is in contact with the steel rail.
S13: when the feeding shaft moves towards the axial direction right below the steel rail, a data recording timer is started at the same time, and the position of the feeding motor and the current of the feeding motor are recorded. Here, the faster the timer timing frequency, the better, preferably not less than 500Hz. (during the process of the feeding shaft driving the grinding wheel to move, the grinding equipment is jacked up when the grinding wheel touches the steel rail).
S14: when it is judged that the feed shaft moves to the target position, data recording is stopped, and data (i.e., low-frequency current data) of 10Hz or less is extracted from the recorded feed motor current by using a low-pass filtering algorithm. Since a large amount of high-frequency components exist in the current of the feeding motor, the collision process is in a low-frequency part in the current parameter, so that data below 10Hz are extracted, the 10Hz in the embodiment is test data, and the device can be set according to actual conditions in other embodiments.
S15: from the extracted low-frequency (below 10 Hz) current data, the characteristic that the current exceeds a set threshold value is found, the characteristic can be understood as the jump characteristic of the current (namely, the phenomenon that the grinding wheel collides with the steel rail in current change, if the jump characteristic cannot be found, the grinding wheel does not collide with the steel rail, the abrasion of the grinding wheel is serious or the grinding equipment is abnormal), and the corresponding position where the collision occurs is found in the recorded position data of the feeding motor (also can be understood as the feeding shaft) and recorded as X_0.
S16: and (3) taking X_0 as a reference and biasing the workpiece to a direction far away from the steel rail by 5mm to obtain X_0-5, and moving a feed motor (a feed shaft of the feed motor) to the X_0-5 to finish rough tool setting of the grinding reference. The offset distance is mainly influenced by the refreshing frequency of the data record and the clearance of the polishing equipment, and can be adjusted according to actual tests.
(II) accurate tool setting flow
Please refer to fig. 2, which illustrates a precise tool setting process according to the present embodiment. The process simulates a process of correcting the polishing reference by visually observing spark variation in a manual polishing process. The method mainly comprises the steps of extracting low-frequency components representing the contact condition of a grinding wheel from the current of a grinding motor in real time (shown in fig. 3 and 4) in the low-speed feeding process of a feeding shaft, comparing the low-frequency components with reference current (namely the idle current of the grinding wheel), and stopping the movement of the feeding shaft when the extracted data exceeds a certain proportion C (optionally 15-20%) of the idle current of the grinding wheel, so that accurate correction of the grinding reference is realized. Because the grinding motor is directly connected with the grinding wheel or is driven synchronously at one stage, the nonlinear influence of friction and the like in the transmission process on the motor current is negligible, so that the grinding wheel contact condition is effectively judged according to the current of the main shaft of the grinding motor in the embodiment.
The specific process is as follows:
s21: setting a second target speed of the feeding shaft to be 2-3mm/s by taking the feeding shaft at a rough tool setting position X_0-5 as a reference, wherein the target position is preferably 2mm/s, starting current collection of a main shaft of a polishing motor at the same time, and extracting data below 10Hz in real time.
S22: and starting the polishing motor, waiting for the polishing motor to reach the target rotating speed, and enabling the polishing motor to reach the cutting speed, wherein the optional speed is 3600-4000rpm.
S23: the feed shaft moves axially in accordance with the set parameters (i.e., the parameters set in step S21).
S24: judging whether the real-time current of the grinding motor exceeds 20% of the idle current, if so, stopping axial movement of the feed shaft, finishing accurate correction of the grinding wheel, and realizing accurate tool setting of the grinding reference. If the spindle current of the grinding motor is not detected to exceed 20% of the idle current until the feed shaft moves to the forward maximum position, an abnormality of the grinding apparatus is indicated. The idling current is a current in a state where the grinding wheel is not cutting when idling. In this embodiment, 20% of the test data is obtained by testing the motor and the polishing equipment.
In summary, in the actual operation process, the rough setting tool is used once before polishing, and a rough polishing reference is found. And then taking the found rough reference as a starting point of accurate tool setting to finish accurate tool setting, returning the grinding wheel to the rough reference position after finishing polishing of the angle, adjusting the grinding wheel to the next target angle, and then carrying out accurate tool setting under the next target angle, and repeating the process until finishing polishing of the whole rail head.
Example two
The embodiment provides a quick tool setting system for rail welding seam automatic polishing, includes:
the rough tool setting module is used for feeding the grinding wheel towards the rail under the condition that the grinding wheel of the grinding equipment does not rotate before grinding, recording the position of the feeding motor of the grinding equipment in the feeding process and the current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold value according to the recorded data, and determining a rough grinding reference by taking the position as the reference to realize rough tool setting of the grinding reference;
the accurate tool setting module is used for feeding the grinding wheel towards the steel rail by taking the position of the coarse tool setting as a starting point of accurate tool setting in the grinding process and judging the contact condition of the grinding wheel and the steel rail in real time by analyzing the current change of the grinding motor, so that the accurate tool setting of a grinding reference is realized and the accurate tool setting of the grinding reference is realized;
the grinding motor is used for driving the grinding wheel to rotate, and the feeding motor is used for driving the grinding wheel to axially feed.
Example III
The present embodiment provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the fast tool setting method for automatic grinding of rail welds of embodiment one when executing the computer program.
Example IV
The present embodiment provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the rapid tool setting method for automatic grinding of rail welds of embodiment one.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application 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 solutions in the embodiments of the present application may be implemented in various computer languages, for example, an object-oriented programming language Java, an transliterated script language javascript, and the like.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. 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.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. A quick tool setting method for automatically polishing a steel rail welding seam is characterized by comprising the following steps of: comprising the following steps:
before polishing, feeding the grinding wheel towards a rail under the condition that the grinding wheel of the polishing equipment does not rotate, recording the position of a feeding motor of the polishing equipment in the feeding process and current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold according to the recorded data, and determining a rough polishing reference by taking the position as a reference to realize rough tool setting of the polishing reference;
in the polishing process, under the condition that the grinding wheel rotates, the grinding wheel is fed towards the steel rail by taking the position of the coarse tool setting as a starting point of the precise tool setting, and the contact condition of the grinding wheel and the steel rail is judged in real time by analyzing the current change of the polishing motor, so that the precise tool setting of a polishing reference is realized, and the precise tool setting of the polishing reference is realized;
the grinding motor is used for driving the grinding wheel to rotate, and the feeding motor is used for driving the grinding wheel to axially feed.
2. The rapid tooling method for automatic grinding of rail welds of claim 1, wherein: before polishing, feeding the grinding wheel towards a rail under the condition that the grinding wheel of the polishing equipment does not rotate, recording the position of a feeding motor of the polishing equipment in the feeding process and current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold according to the recorded data, and determining a rough polishing reference by taking the position as a reference to realize rough tool setting of the polishing reference, wherein the method comprises the following steps:
s11: checking and ensuring that the grinding motor is in a stop state, and simultaneously, the grinding wheel is right above the steel rail;
s12: setting a first target speed of the feeding motor for driving the feeding shaft to axially move, wherein the target position is a forward maximum position, and the forward maximum position is a position of the feeding shaft which axially moves to the farthest position under the steel rail;
s13: when the feeding shaft moves axially towards the right lower part of the steel rail, a timer for recording data is started at the same time, and the position of the feeding motor and the current of the feeding motor are recorded;
s14: stopping recording data after the feeding shaft moves axially to the target position, and extracting low-frequency current data below AHz from the recorded feeding motor current;
s15: finding out the characteristic that the current exceeds a set threshold value from the low-frequency current data below AHz, finding out the corresponding position of the grinding wheel, which collides with the steel rail, in the recorded feeding motor position data, and recording as X_0, wherein the characteristic that the current exceeds the set threshold value is the current change generated when the grinding wheel collides with the steel rail;
s16: and (3) taking X_0 as a reference and biasing a millimeter in a direction away from the steel rail to obtain X_0-a, and moving a feed shaft of a feed motor to the X_0-a position to finish rough tool setting of a grinding reference.
3. The rapid tool setting method for automatic grinding of rail welds according to claim 2, characterized by: the method extracts AHz current data from the recorded feed motor current, the method comprising: current data below 10Hz is extracted from the recorded feed motor current by a low pass filtering algorithm.
4. The rapid tool setting method for automatic grinding of rail welds according to claim 2, characterized by: the value range of the first target speed is 30-60mm/s.
5. The rapid tool setting method for automatic grinding of rail welds according to claim 2, characterized by: the timing frequency of the timer is greater than or equal to 500Hz.
6. The rapid tool setting method for automatic grinding of rail welds according to claim 2, characterized by: in the polishing process, under the condition that the grinding wheel rotates, the grinding wheel is fed towards the steel rail by taking the position of the coarse tool setting as a starting point of the precise tool setting, the contact condition of the grinding wheel and the steel rail is judged in real time by analyzing the current change of the polishing motor, the precise tool setting of a polishing reference is realized, and the precise tool setting of the polishing reference is realized, and the method comprises the following steps:
s21: setting a second target speed of the feeding motor for driving the feeding shaft to axially move by taking the feeding motor at the position X_0-a as an accurate tool setting starting point, wherein the target position is a forward maximum position, simultaneously starting main shaft current acquisition of the grinding motor, and extracting data below BHz in real time;
s22: starting a polishing motor and waiting for the polishing motor to reach a target rotating speed;
s23: when the polishing motor reaches the target rotating speed, the feeding shaft axially moves;
s24: judging whether the data below the main shaft current BHz of the grinding motor exceeds C of the idle current, if so, stopping axial movement of the feed shaft, finishing accurate correction of the grinding wheel, and realizing accurate tool setting of a grinding reference; if the main shaft current of the grinding motor cannot be detected to exceed the idling current until the feeding shaft moves to the position of the maximum forward direction, the grinding equipment is abnormal, wherein the idling current is the current in the state of not cutting when the grinding wheel idles, and the value range of C% is 15-20%.
7. The rapid tooling method for automatic grinding of rail welds of claim 6, wherein: the value range of the second target speed is 2-3mm/s.
8. A quick tool setting system for rail welding seam is automatic to be polished, its characterized in that: comprising the following steps:
the rough tool setting module is used for feeding the grinding wheel towards the rail under the condition that the grinding wheel of the grinding equipment does not rotate before grinding, recording the position of the feeding motor of the grinding equipment in the feeding process and the current data of the feeding motor in the feeding process in real time, finding out the position corresponding to the feeding motor when the current of the feeding motor exceeds a set threshold value according to the recorded data, and determining a rough grinding reference by taking the position as the reference to realize rough tool setting of the grinding reference;
the accurate tool setting module is used for feeding the grinding wheel towards the steel rail by taking the position of the coarse tool setting as a starting point of accurate tool setting in the grinding process and judging the contact condition of the grinding wheel and the steel rail in real time by analyzing the current change of the grinding motor, so that the accurate tool setting of a grinding reference is realized and the accurate tool setting of the grinding reference is realized;
the grinding motor is used for driving the grinding wheel to rotate, and the feeding motor is used for driving the grinding wheel to axially feed.
9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized by: the processor, when executing the computer program, implements the steps of the rapid tool setting method for automatic grinding of rail welds according to any one of claims 1 to 7.
10. A computer-readable storage medium having stored thereon a computer program, characterized by: the computer program, when executed by a processor, implements the steps of the rapid tool setting method for automatic grinding of rail welds according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311194692.3A CN117403489A (en) | 2023-09-15 | 2023-09-15 | Rapid tool setting method and system for automatic grinding of steel rail welding seams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311194692.3A CN117403489A (en) | 2023-09-15 | 2023-09-15 | Rapid tool setting method and system for automatic grinding of steel rail welding seams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117403489A true CN117403489A (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311194692.3A Pending CN117403489A (en) | 2023-09-15 | 2023-09-15 | Rapid tool setting method and system for automatic grinding of steel rail welding seams |
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| Country | Link |
|---|---|
| CN (1) | CN117403489A (en) |
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2023
- 2023-09-15 CN CN202311194692.3A patent/CN117403489A/en active Pending
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