CN115685873A - Groove cutting compensation method and system for laser cutting machine and computing terminal - Google Patents
Groove cutting compensation method and system for laser cutting machine and computing terminal Download PDFInfo
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Abstract
The invention provides a groove cutting compensation method, a groove cutting compensation system and a calculation terminal of a laser cutting machine, wherein a cutting head is controlled to move to the center of a chuck along a first defined direction; carrying out follow-up calibration on four surfaces of the pipe; executing a four-point centering process, and detecting the follow-up heights of the four points in a second defined direction; calculating the compensation quantity of the actual rotation center of the pipe according to the follow-up height measured by the four points and the rotation angle of the rotating shaft; detecting the positive follow-up height and the negative follow-up height, calculating the inclination angle of the pipe, and correcting and compensating the cutting track of the cutting head by preset compensation amount; and detecting a compensation value according to the difference value between the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within an error range. The invention compensates when cutting the groove, improves the precision of the cutting process, can monitor the cutting process in real time, verifies the states of the rotation center and the swing center and ensures the precision of the cutting process.
Description
Technical Field
The invention relates to the field of laser cutting control of metal pipes, in particular to a groove cutting compensation method and system for a laser cutting machine and a computing terminal.
Background
The center coordinate of the rotating shaft of the metal pipe cutting system is an important parameter for carrying out cutting operation. The clamping center of the metal pipe has certain errors in the assembling and measuring processes, and due to the process conditions of clamping by the chuck, the situation that the center of the chuck is not coincident with the rotation center possibly exists, so that the cutting precision is influenced, the centering compensation is carried out on the pipe, the rotation center of the pipe is found, and the cutting precision is improved. In groove cutting, the angle of the swinging head is an important parameter in a numerical control system, if the pipe deforms due to gravity and materials, the swinging of the cutting head is opposite in angle in the cutting process, so that the cutting precision is reduced, the cutting track is corrected according to different pipes, and the cutting precision is improved.
If manual measurement is adopted, certain errors can be generated, and the measurement time is long; if a special sensor is adopted for measurement, the cost is high, the measurement steps are complex, the cutting efficiency is influenced, the real-time monitoring cannot be carried out, and whether the found rotation center and the found swing center are correct or not is verified.
Disclosure of Invention
The invention provides the following three aspects in order to overcome the problems that certain errors are generated by adopting manual measurement and real-time monitoring cannot be realized.
The first aspect of the method relates to a groove cutting compensation method for a laser cutting machine, which utilizes an efficient measuring method to enable a measuring result to be accurate and can carry out real-time detection when a groove is cut.
The groove cutting compensation method of the laser cutting machine comprises the following steps:
step 1: controlling the cutting head to move to the center of the chuck along a first defined direction;
and 2, step: carrying out follow-up calibration on four surfaces of the pipe;
controlling the rotating shaft to rotate to 0 degree, 90 degrees, 180 degrees and 270 degrees in sequence to execute a four-point centering process, and detecting the follow-up heights of the four points in a second defined direction;
and step 3: calculating the compensation amount of the actual rotation center of the pipe according to the follow-up height measured by four-point centering and the rotation angle of the rotating shaft;
and 4, step 4: sequentially detecting the positive follow-up height when the swinging head of the cutting head swings to the positive maximum angle and the negative follow-up height when the swinging head swings to the negative maximum angle, calculating the inclination angle of the pipe, and obtaining the Z-axis compensation height difference generated when the cutting head swings;
and 5: and correcting and compensating the cutting track of the cutting head through the total Z-axis compensation height difference, detecting a compensation value according to the difference value of the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within an error range.
It should be further noted that the cutting head is provided with a height sensor for detecting the distance between the cutting head and the surface of the pipe.
It should be further noted that, in the step 3, a 0-degree state is set as a first surface of the pipe, a 90-degree state is set as a second surface of the pipe, a 180-degree state is set as a second surface of the pipe, and a 270-degree state is set as a fourth surface of the pipe;
obtaining the offset of the rotation center of the pipe relative to the center of the chuck through the following height difference of the first surface and the third surface and the following height difference of the second surface and the fourth surface;
calculating the compensation value of the first defined direction according to the follow-up height measured by the four surfaces
And a compensation value for a second defined direction
Then, there are:
it is further specified that the compensation value is dependent on a first defined direction
Compensation value of the second defined direction
And the pipe rotation angle alpha is calculated, and the theoretical Z-axis compensation height difference before and after compensation is calculated
：
Alpha is the rotation angle of the pipe, k is a constant, and the value range is 55-60.
It should be further noted that, in step 4, the compensation amount generated when the cutting head swings is calculated based on the following height difference obtained by swinging the head of the cutting head twice.
It is further specified that the maximum angle B that the head of the cutting head can swing is dependent on max Distance L3 from the cutting head rotation point to the cutting head and follow-up height difference Z difference Obtaining the inclination angle of the pipe
：
According to the distance L3 from the rotation point of the cutting head to the cutting head and the swinging angle B of the cutting head tube And the inclination angle of the pipe
The swing Z-axis compensation height difference is obtained,
it should be further noted that, in step 5,
calculating the total Z-axis compensation height difference by the following formula
Compensating the total Z axis for the height difference
Comparing the compensated follow-up height with the follow-up height during actual cutting to obtain a comparison difference value, and judging whether the comparison difference value is within an error range;
if the comparison difference is within the error range, the laser cutting groove compensation meets the requirement;
if the comparison difference value exceeds the error range, the steps 1 to 5 are executed again until the comparison difference value is within the error range.
A second aspect relates to a groove cutting compensation system for a laser cutting machine, the system comprising: the cutting machine comprises a coordinate system setting module, a calibration module, a cutting head control module, a chuck control module and a data processing module;
the coordinate system setting module is used for acquiring a cutting coordinate system set by a user and setting a first definition direction and a second definition direction in the cutting coordinate system;
the cutting head control module is used for receiving a control command input by a user and controlling the cutting head to move to the center of the chuck along a first defined direction;
the calibration module is used for carrying out follow-up calibration on four surfaces of the pipe according to a control instruction of a user;
the chuck control module is used for controlling the rotation of the rotating shaft, and the calibration module sets the state of 0 degree as a first surface of the pipe, the state of 90 degrees as a second surface of the pipe, the state of 180 degrees as the second surface of the pipe, and the state of 270 degrees as a fourth surface of the pipe;
the data processing module executes a four-point centering process based on 0 degree, 90 degrees, 180 degrees and 270 degrees, and detects the follow-up heights of the four points in a second defined direction;
the data processing module calculates the compensation quantity of the actual rotation center of the pipe according to the follow-up height measured by the four points and the rotation angle of the rotating shaft;
sequentially detecting the positive follow-up height when the swinging head of the cutting head swings to a positive maximum angle and the negative follow-up height when the swinging head swings to a negative maximum angle, calculating the inclination angle of the pipe, and correcting and compensating the cutting track of the cutting head by preset compensation amount;
and detecting a compensation value according to the difference value between the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within an error range.
A third aspect relates to a computing terminal with cutting compensation, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the groove cutting compensation method of the laser cutting machine when executing the program.
According to the technical scheme, the invention has the following advantages:
the groove cutting compensation method of the laser cutting machine, which is disclosed by the invention, can be applied to the groove cutting process and procedure of laser cutting, can control the laser cutting head to calibrate the center of the chuck, rotate the rotating shaft on four sides, and detect the follow-up height of the surface of the laser cutting head and a cut pipe. Calculating the position of the actual rotation central point of the pipe according to the following height difference between the cutting head with two opposite surfaces on the four surfaces and the surface of the pipe; calculating the actual inclination angle of the pipe according to the swing angle of the cutting head and the follow-up height of the cutting head relative to the surface of the pipe, compensating the swing angle of the cutting head, and comparing the actual follow-up height through the cutting angle in actual cutting to verify whether the compensated value is in an error range. Therefore, the precision of the cutting process is improved, the cutting process can be monitored in real time, the states of the rotation center and the swing center are verified, and the precision of the cutting process is guaranteed.
The invention can compensate the cutting groove, improve the accuracy of the cutting process, monitor the cutting process in real time, verify the states of the rotation center and the swing center, and overcome the defects that certain error is generated and the measuring time is longer if manual measurement is adopted. The invention does not need to adopt a special sensor for measurement and stop cutting in the measurement process, improves the cutting efficiency, and avoids the problem that the prior art can not monitor and verify whether the rotation center and the swing center meet the error requirement in real time.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the description will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a groove cutting compensation method of a laser cutting machine;
FIG. 2 is a schematic view of a cross section of a pipe and a coordinate system;
FIG. 3 is a schematic diagram of four-point calibration;
FIG. 4 is a schematic view of the rotation angle of the pipe;
FIG. 5 is a schematic view of the Y and Z deviations of the center of rotation from the chuck center;
FIG. 6 is an enlarged view of the point A in FIG. 5;
FIG. 7 is an enlarged view of the point B in FIG. 5;
fig. 8 is a schematic diagram of a groove cutting compensation system of a laser cutting machine.
Detailed Description
As shown in fig. 1, the diagram provided in the groove cutting compensation method of the laser cutting machine according to the present invention is only a schematic illustration of the basic idea of the present invention, and only the components related to the present invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in practical implementation, the type, number and ratio of each component in practical implementation can be changed at will, and the layout of the components may be more complicated.
The groove cutting compensation method of the laser cutting machine can acquire and process associated data based on an artificial intelligence technology. Among them, artificial Intelligence (AI) is a theory, method, technique and application device that simulates, extends and expands human Intelligence using a digital computer or a machine controlled by a digital computer, senses the environment, acquires knowledge and uses the knowledge to obtain the best result.
Fig. 1 shows a flowchart of a groove cutting compensation method of a laser cutting machine according to a preferred embodiment of the present invention. The groove cutting compensation method for the laser cutting machine is applied to one or more computing terminals, wherein the computing terminals are equipment capable of automatically performing numerical calculation and/or information processing according to preset or stored instructions, and hardware of the computing terminals includes but is not limited to a microprocessor, an Application Specific Integrated Circuit (ASIC), a Programmable Gate Array (FPGA), a Digital Signal Processor (DSP), embedded equipment and the like.
The computing terminal may be any electronic product capable of performing human-computer interaction with a user, for example, a Personal computer, a tablet computer, a smart phone, a Personal Digital Assistant (PDA), an Internet Protocol Television (IPTV), and the like.
The computing terminal may also include network devices and/or user equipment. The network device includes, but is not limited to, a single network server, a server group consisting of a plurality of network servers, or a Cloud Computing (Cloud Computing) based Cloud consisting of a large number of hosts or network servers.
The Network in which the computing terminal is located includes, but is not limited to, the internet, a wide area Network, a metropolitan area Network, a local area Network, a Virtual Private Network (VPN), and the like.
The groove cutting compensation method of the laser cutting machine according to the present invention will be described in detail with reference to fig. 1 to 7, and includes:
s101: controlling the cutting head to move to the center of the chuck along a first defined direction;
s102: carrying out follow-up calibration on four surfaces of the pipe; the pipe material is a metal pipe material with a square pipe or a rectangular pipe.
Controlling the rotating shaft to rotate to 0 degree, 90 degrees, 180 degrees and 270 degrees in sequence to execute a four-point centering process, and detecting the follow-up heights of the four points in a second defined direction;
s103: calculating the compensation Z of the actual rotation center of the pipe according to the follow-up height of the Z axis measured by four-point centering and the rotation angle of the rotating shaft center ；
S104: sequentially detecting the positive follow-up height when the swinging head of the cutting head swings to the positive maximum angle and the negative follow-up height when the swinging head swings to the negative maximum angle, calculating the pipe inclination angle of the pipe relative to the plane formed by the X axis and the Y axis, and obtaining the Z-axis compensation height difference Z generated when the cutting head swings sway ；
It is understood that the plane formed by the X and Y axes is the plane formed by the first defined direction and the second defined direction of the present invention.
S105: cutting track Z of compensation cutting head is revised through total Z axle compensation difference in height all And detecting a compensation value according to the difference value between the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within the error range.
The groove cutting compensation method of the laser cutting machine, which is disclosed by the invention, can be applied to the groove cutting process and procedure of laser cutting, can control the laser cutting head to calibrate the center of the chuck, rotate the rotating shaft on four sides, and detect the follow-up height of the surface of the laser cutting head and a cut pipe. Calculating the position of the actual rotation central point of the pipe according to the follow-up height difference between the cutting head with two opposite surfaces on the four surfaces and the surface of the pipe; calculating the actual inclination angle of the pipe according to the swing angle of the cutting head and the follow-up height of the cutting head relative to the surface of the pipe, compensating the track of the cutting head, and detecting whether the compensation value is in an error range or not through the difference between the compensated follow-up height and the follow-up height during actual cutting. Therefore, the precision of the cutting process is improved, the cutting process can be monitored in real time, the states of the rotation center and the swing center are verified, and the precision of the cutting process is guaranteed.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the sequence numbers of the steps in the following embodiments do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The groove cutting calibration method of the laser cutting equipment provided by the invention adopts a right-hand Cartesian coordinate system, the upper and lower sides of the right-hand Cartesian coordinate system are in the Z-axis direction, the front and rear sides of the right-hand Cartesian coordinate system are in the Y-axis direction, and the left and right sides of the right-hand Cartesian coordinate system are in the X-axis direction. The type and coordinate system of the tube are established as shown in fig. 2, wherein a first defined direction may be defined as a Y-axis direction in a right-handed cartesian coordinate system, and a second defined direction may be defined as a Z-axis direction in the right-handed cartesian coordinate system. The length and the width of the pipe can be measured according to the caliper, and the measurement output of the pipe is input into a control system, so that the subsequent control and calculation are facilitated.
The distance between the cutting head and the surface of the pipe needs to be acquired in the execution process, and the embodiment can acquire distance information by using a capacitive height-adjusting sensor. In the descending process of the cutting head, the sensor can sense the distance from the surface of the pipe in real time, and control the cutting head to stop descending when the preset distance is reached, and can display the distance from the surface of the pipe; or the distance between the surface of the pipe is measured by a laser distance measuring sensor, the pipe is also descended to a certain distance to control the cutting head to stop descending, and the distance between the cutting head and the surface of the pipe can be displayed.
Further, as shown in fig. 3, a specific manner of the four-point centering process according to the embodiment of the present invention is as follows:
a1, setting T to show the cardThe disc center, t, represents the actual center of rotation of the tubing. As shown in FIG. 4, the rotation angle of the pipe is represented by alpha (alpha is more than or equal to 0 and less than or equal to 45 degrees) between the central axis of the pipe and the vertical direction, the rotation angle of the rotating shaft is gamma, and the clockwise direction is the positive direction. The actual center of rotation of tubular product compares and has the skew in chuck center to the chuck center is the origin, and the skew of center of rotation is: offset in the Y direction of
Z-direction offset of
。
In the embodiment provided by the invention, the state of 0 degree is a first surface of the pipe, the state of 90 degrees is a second surface of the pipe, the state of 180 degrees is a second surface of the pipe, and the state of 270 degrees is a fourth surface of the pipe;
and A2, rotating the rotating shaft to 0 degree, namely the pipe is at the initial position and does not rotate. The cutting head moves to the Y-axis position in the center of the chuck and waits for the cutting head to descend.
A3, when the rotation axis is 0 degree, for the first face of tubular product, alpha =0 at this moment, the cutting head descends, after entering the follow-up state, stops descending after apart from tubular product preset distance, gathers first numerical value, records that Z axle follow-up height is Z1. The Z-axis follow-up height is herein understood to be the Z-axis coordinate value of the laser head.
A4, rotating the rotating shaft to 90 degrees, namely rotating the pipe by 90 degrees as the second surface of the pipe, wherein the pipe can be rotated by clockwise or anticlockwise in the rotating process. The specific direction of rotation is not limited.
After the rotation, alpha =90 degrees at the moment, the cutting head descends, after the cutting head enters a follow-up state, the cutting head stops descending after a certain distance from the pipe, a second numerical value is collected, and the Z-axis follow-up height is recorded as Z2.
A5, the rotating shaft rotates to 180 degrees, the pipe is the third surface, alpha =180 degrees at the moment, the cutting head descends, after the cutting head enters the follow-up state, the cutting head stops descending after a certain distance from the pipe, a third numerical value is collected, and the Z-axis follow-up height is recorded as Z3.
A6, the rotation of rotation axis is to 270 degrees, for the tubular product fourth side, alpha =270 this moment, and the cutting head descends, gets into the follow-up state after, stops descending apart from tubular product certain distance after, gathers the fourth numerical value, records that Z axle follow-up height is Z4.
And A7, according to the collected Z-axis coordinates of the four surfaces, deviating the belt direction, wherein the positive direction is the positive direction. Obtaining the Z-direction deviation of the actual rotation center relative to the chuck center according to the Z-axis coordinate difference of the first surface of the pipe and the third surface of the pipe
(ii) a Obtaining the Y-direction deviation of the actual rotation center relative to the chuck center according to the Z-axis coordinate difference of the second surface and the fourth surface of the pipe
。
A Z-axis direction deviation of
；
A Y-axis direction deviation of
。
And A8, if the pipe does not have an inclination angle in the X-axis direction, the pipe is perpendicular to a plane formed by the Y axis and the Z axis at the moment, and the cutting track of the laser cutting head can be corrected after the offset compensation of the rotation center is carried out.
In this embodiment, the calculation is further performed according to the measured offset of the rotation center and the compensation amount of the tube rotation angle corresponding to the Z-axis height, as shown in fig. 5 to 7, specifically including:
the compensation amount of the Z axis in the coordinate system comprises: the rotation angle alpha of the pipe, the distance between the theoretical rotation of the pipe and the surface of the pipe after actual rotation is d, the distance between the center of the chuck and the rotation center at the inclination angle of the pipe is m, the height difference in the vertical direction of the cutting points before and after compensation is compensation quantity according to a second rotation angle beta changed by the change of the rotation angle of the pipe
。
The surface distance of the pipe after theoretical rotation and actual rotation of the pipe is obtained through the rotation angle of the pipe and the measured offset of the rotation center:
and then the distance between the center of the chuck and the rotation center on the inclination angle of the pipe is obtained by the rotation angle of the pipe and the measured offset of the rotation center:
thus, the Z-axis compensation height difference is calculated by the following formula:
further calculation obtains
Wherein the second rotation angle is calculated
，
. The value range of k is 55 to 60.
Furthermore, the invention also relates to a recognition mode of the center angle of the swinging head in the groove cutting process, namely, the positive follow-up height when the swinging head of the cutting head swings to the positive maximum angle and the negative follow-up height when the swinging head swings to the negative maximum angle are sequentially detected, the inclination angle of the pipe is calculated, and the cutting track of the cutting head is corrected and compensated by the preset compensation amount;
the method comprises the following specific steps:
b1, rotating the rotating shaft to 0 degree, controlling the swinging head to swing to the maximum angle in the positive direction, wherein the swinging head swings to the positive direction of the X axis, and the angle is B max+ Controlling the cutting head to descend and enter a follow-up state until the cutting head stops descending, performing follow-up ascending and descending, and measuring a relatively stable Z-axis coordinate value as Z B+ 。
B2, raising the cutting head again, swinging the cutting head to the maximum angle in the negative direction, and swinging the head to the negative direction of the X axis, wherein the angle is B max- Controlling the cutting head to descend and enter a follow-up state until the cutting head stops descending, continuing to ascend and descend in a follow-up manner, and measuring a relatively stable Z-axis coordinate value Z B- The following height difference of the two points can be obtained by the measured following heights of the two points
。
And B3, lifting the cutting head, swinging the swinging head to 0 degree, and obtaining the inclination angle of the pipe relative to the plane formed by the X axis and the Y axis through the measured two-point follow-up height difference, the maximum swinging angle of the swinging head and the distance between the swinging point of the swinging head and the cutting head, wherein the inclination angle can be obtained through the two-point follow-up height difference and the maximum swinging angle of the swinging head of the cutting head. The tube inclination angle acquisition mode of the invention is as follows:
wherein the content of the first and second substances,
the length of L3 is the angle of inclination of the pipe relative to the plane formed by the X axis and the Y axis, the distance from the swinging point of the swinging head to the cutting head can be measured by a standard component, B max For the maximum angle at which the head can swing, when
When the value is positive, the front surface of the pipe is tilted, and the head swing compensation value is positive at the moment, and the pipe swings for a certain angle in the positive direction; when the temperature is higher than the set temperature
When the value is negative, the back of the pipe is tilted, and the swing compensation value is negative and swings for a certain angle in the negative direction.
B4, the line segment 201 is a track of the compensated cutting according to L3 and B tube 、B tilt And obtaining the swing Z-axis compensation height difference.
Swing Z-axis compensation height difference
The following formula is obtained:
wherein the content of the first and second substances,
the height difference is compensated for the Z axis generated when the cutting head swings,
is the swinging angle of the head of the cutting head.
And B5, correcting and compensating the cutting track of the cutting head through the total Z-axis compensation height difference.
In an embodiment of the present invention, the total Z-axis compensation height difference obtains the following formula:
namely, it is
And B6, performing compensation correction according to the total Z-axis compensation height difference before and after compensation, and correcting the cutting track of the cutting head by the compensation amount. When the groove is cut, the change value of the follow-up height is changed
Comparing the follow-up height after compensation with the follow-up height during actual cutting to obtain a comparison difference value, and judging whether the comparison difference value is within an error range;
if the comparison difference is within the error range, the laser cutting groove compensation meets the requirement;
and if the comparison difference value is beyond the error range, repeatedly executing A2-A8 and B1-B5, and performing groove cutting compensation until the comparison difference value is within the error range. And if the comparison difference value still exceeds the error range after the preset times of compensation, alarming and prompting.
Based on the method, the invention also provides a groove cutting compensation system of the laser cutting machine, as shown in fig. 8, the system comprises: the cutting machine comprises a coordinate system setting module, a calibration module, a cutting head control module, a chuck control module and a data processing module;
the coordinate system setting module is used for acquiring a cutting coordinate system set by a user and setting a first definition direction and a second definition direction in the cutting coordinate system;
the cutting head control module is used for receiving a control command input by a user and controlling the cutting head to move to the center of the chuck along a first defined direction;
the calibration module is used for carrying out follow-up calibration on four surfaces of the pipe according to a control instruction of a user;
the chuck control module is used for controlling the rotation of the rotating shaft, and the calibration module sets the state of 0 degree as a first surface of the pipe, the state of 90 degrees as a second surface of the pipe, the state of 180 degrees as the second surface of the pipe, and the state of 270 degrees as a fourth surface of the pipe;
the data processing module executes a four-point centering process based on 0 degree, 90 degrees, 180 degrees and 270 degrees, and detects the follow-up heights of the four points in a second defined direction;
the data processing module calculates the compensation amount of the actual rotation center of the pipe according to the follow-up height measured by the four points and the rotation angle of the rotating shaft;
sequentially detecting the positive follow-up height when the swinging head of the cutting head swings to a positive maximum angle and the negative follow-up height when the swinging head swings to a negative maximum angle, calculating the inclination angle of the pipe, and correcting and compensating the cutting track of the cutting head by preset compensation amount;
and detecting a compensation value according to the difference value between the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within an error range.
The invention relates to a method for compensating during groove cutting, which improves the precision of the cutting process, can monitor the cutting process in real time, verifies the states of a rotation center and a swing center and ensures the precision of the cutting process. The defect that certain errors are generated and the measuring time is long if manual measurement is adopted is overcome. The groove cutting compensation method of the laser cutting machine can carry out real-time detection in the cutting process, improves the precision, does not need to adopt a special sensor for measurement, does not need to stop cutting in the measurement process, improves the cutting efficiency, and avoids the problem that the prior art can not carry out real-time monitoring and verification on whether a rotation center and a swing center meet the error requirement or not.
The groove cutting compensation method for the laser cutting machine, provided by the invention, is combined with the units and algorithm steps of each example described in the embodiment disclosed in the text, and can be realized by electronic hardware, computer software or a combination of the two. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
Those skilled in the art will appreciate that aspects of the laser cutter groove cut compensation method provided by the present invention may be embodied as a system, method or program product. Accordingly, various aspects of the present disclosure may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
The groove cutting compensation method for the laser cutting machine provided by the invention can write program codes for executing the operation of the disclosure in any combination of one or more programming languages, wherein the programming languages comprise an object-oriented programming language, such as Java, C + +, and the like, and a conventional procedural programming language, such as "C" or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A groove cutting compensation method of a laser cutting machine is characterized by comprising the following steps:
step 1: controlling the cutting head to move to the center of the chuck along a first defined direction;
and 2, step: carrying out follow-up calibration on four surfaces of the pipe;
controlling the rotating shaft to rotate to 0 degree, 90 degrees, 180 degrees and 270 degrees in sequence to execute a four-point centering process, and detecting the follow-up heights of the four points in a second defined direction;
and 3, step 3: calculating the compensation amount of the actual rotation center of the pipe according to the follow-up height measured by four-point centering and the rotation angle of the rotating shaft;
and 4, step 4: sequentially detecting the positive follow-up height when the swinging head of the cutting head swings to a positive maximum angle and the negative follow-up height when the swinging head swings to a negative maximum angle, calculating the inclination angle of the pipe, and obtaining a Z-axis compensation height difference generated when the cutting head swings;
and 5: and correcting and compensating the cutting track of the cutting head through the total Z-axis compensation height difference, detecting a compensation value according to the difference value of the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within an error range.
2. The groove cutting compensation method for a laser cutting machine according to claim 1,
the cutting head is provided with a height sensor for detecting the distance between the cutting head and the surface of the pipe.
3. The groove cutting compensation method of a laser cutting machine according to claim 1,
in the step 3, setting the state of 0 degree as a first surface of the pipe, the state of 90 degrees as a second surface of the pipe, the state of 180 degrees as the second surface of the pipe, and the state of 270 degrees as a fourth surface of the pipe;
obtaining the offset of the rotation center of the pipe relative to the center of the chuck through the following height difference of the first surface and the third surface and the following height difference of the second surface and the fourth surface;
calculating the compensation value of the first defined direction according to the follow-up height measured by the four surfaces
And a compensation value for a second defined direction
Then, there are:
4. the groove cutting compensation method for a laser cutting machine according to claim 3,
compensation value according to a first defined direction
Compensation value of the second defined direction
And the pipe rotation angle alpha is calculated, and the theoretical Z-axis compensation height difference before and after compensation is calculated
：
Alpha is the rotation angle of the pipe, k is a constant, and the value range is 55-60.
5. The groove cutting compensation method for a laser cutting machine according to claim 1,
and 4, calculating the compensation amount generated when the cutting head swings based on the follow-up height difference obtained by twice swinging angles of the head of the cutting head.
6. The groove cutting compensation method for a laser cutting machine according to claim 5,
according to the maximum angle B which the head of the cutting head can swing max Distance L3 between the cutting head rotation point and the cutting head and follow-up height difference Z difference Obtaining the inclination angle of the pipe
：
According to the distance L3 from the rotation point of the cutting head to the cutting head and the swinging angle B of the cutting head tube And the inclination angle of the pipe
The swing Z-axis compensation height difference is obtained,
7. the groove cutting compensation method of a laser cutting machine according to claim 6,
in the step 5, the process is carried out,
calculating the total Z-axis compensation height difference by the following formula
Compensating the total Z axis for the height difference
Comparing the compensated follow-up height with the follow-up height during actual cutting to obtain a comparison difference value, and judging whether the comparison difference value is within an error range;
if the comparison difference is within the error range, the laser cutting groove compensation meets the requirement;
if the comparison difference value exceeds the error range, the steps 1 to 5 are executed again until the comparison difference value is within the error range.
8. A groove cutting compensation system of a laser cutting machine is characterized in that the system adopts the groove cutting compensation method of the laser cutting machine according to any one of claims 1 to 7;
the system comprises: the cutting machine comprises a coordinate system setting module, a calibration module, a cutting head control module, a chuck control module and a data processing module;
the coordinate system setting module is used for acquiring a cutting coordinate system set by a user and setting a first definition direction and a second definition direction in the cutting coordinate system;
the cutting head control module is used for receiving a control command input by a user and controlling the cutting head to move to the center of the chuck along a first defined direction;
the calibration module is used for performing follow-up calibration on four surfaces of the pipe according to a control instruction of a user;
the chuck control module is used for controlling the rotation of the rotating shaft, and the calibration module sets the state of 0 degree as a first surface of the pipe, the state of 90 degrees as a second surface of the pipe, the state of 180 degrees as the second surface of the pipe, and the state of 270 degrees as a fourth surface of the pipe;
the data processing module executes a four-point centering process based on 0 degree, 90 degrees, 180 degrees and 270 degrees, and detects the follow-up heights of the four points in a second defined direction;
the data processing module calculates the compensation amount of the actual rotation center of the pipe according to the follow-up height measured by the four points and the rotation angle of the rotating shaft;
sequentially detecting the positive follow-up height when the swinging head of the cutting head swings to a positive maximum angle and the negative follow-up height when the swinging head swings to a negative maximum angle, calculating the inclination angle of the pipe, and correcting and compensating the cutting track of the cutting head by preset compensation amount;
and detecting a compensation value according to the difference value between the compensated follow-up height and the follow-up height during actual cutting, and judging whether the compensation value is within an error range.
9. A computing terminal with cut compensation comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the groove cut compensation method of the laser cutting machine according to any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117102701A (en) * | 2023-10-24 | 2023-11-24 | 上海方菱计算机软件有限公司 | Compensation control method and device for groove cutting height, electronic equipment and storage medium |
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| CN117102701A (en) * | 2023-10-24 | 2023-11-24 | 上海方菱计算机软件有限公司 | Compensation control method and device for groove cutting height, electronic equipment and storage medium |
| CN117102701B (en) * | 2023-10-24 | 2024-03-26 | 上海方菱计算机软件有限公司 | Compensation control method and device for groove cutting height, electronic equipment and storage medium |
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