CN115846903A - Laser cutting deformation-preventing process - Google Patents
Laser cutting deformation-preventing process Download PDFInfo
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- CN115846903A CN115846903A CN202211575914.1A CN202211575914A CN115846903A CN 115846903 A CN115846903 A CN 115846903A CN 202211575914 A CN202211575914 A CN 202211575914A CN 115846903 A CN115846903 A CN 115846903A
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Abstract
The invention discloses a laser cutting anti-deformation process, which comprises the following steps: collecting the row line information of the laser cutting machine, and sending the row line information of the laser cutting machine to a monitoring module, wherein the monitoring module is used for monitoring the row line path of the laser cutting machine; when a row line alarm signal is obtained, obtaining working parameters of the laser cutting machine, and judging and analyzing the laser cutting machine; sending the corrected error value Xw to a processor of the laser cutting machine, and correcting the amplitude of the laser cutting machine; a plurality of cutting breakpoints are arranged on the cutting path; in the cutting process, the cutting parameter value of the laser cutting machine is obtained, the cutting parameter value is monitored in real time, and whether cutting danger exists is judged.
Description
Technical Field
The invention belongs to the technical field of laser cutting, and particularly relates to a laser cutting deformation prevention process.
Background
Chinese patent CN217618511U discloses an anti-deformation device for laser cutting steel plate, including the mounting base, set up a plurality of groups on the top plane of mounting base and run through the fixed orifices at mounting base top, the lower place is inserted in the mounting base and is equipped with a set of with its inner chamber shade, and with mounting base between fixed connection's tray, the central axle sleeve that is equipped with a set of fixed connection with it is inserted in the tray middle part, central axle sleeve bottom and top distribute with the bottom and the top coplane of mounting base respectively. According to the deformation preventing device for the laser cutting steel plate, the screws can penetrate through the fixing holes in the surface of the mounting base to be fixed below the placing table top of the laser cutting machine, and the blocking pieces distributed in a coplanar mode can support and bear waste materials to a certain extent, so that the deformation preventing device for the laser cutting steel plate can prevent the waste materials from falling under the influence of gravity to cause deformation of the fracture edge when being mounted and used;
in the prior art, a steel plate subjected to numerical control cutting processing is a flat-opening winding plate, and residual stress exists inside the steel plate after the steel plate is flat-opening. During cutting, the internal stress is released, and the part deforms; when laser cutting is carried out, the distance between the cutting nozzle and the steel plate is 1mm-3mm, and when the steel plate deforms excessively, the cutting nozzle is often collided, so that the work is interrupted, and even the cutting nozzle is burnt; the cutting operator stares the machine to operate, the cutting speed is high, the reaction is often not timely, the arc starting cutting needs to be carried out again, and a plurality of craters are formed on the edge of the part to influence the appearance; meanwhile, the laser cutting brightness is high, so that discomfort of eyes can be caused, and the safety production is affected.
Disclosure of Invention
The invention aims to solve the problems of the background technology, and provides a laser cutting deformation-preventing process, wherein when a large-size part is cut, one or two break points are arranged on a cutting path of the large-size part according to the length and the size of the part, and after the whole graph is cut, the break points are cut, so that the blanking of the whole part is ensured to be completed smoothly.
The purpose of the invention can be realized by the following technical scheme:
the laser cutting deformation prevention process comprises the following steps:
step 1: collecting the row line information of the laser cutting machine, and sending the row line information of the laser cutting machine to a monitoring module, wherein the monitoring module is used for monitoring the row line path of the laser cutting machine;
step 2: obtaining a row line normal signal, a row line alarm signal and a row line scrapping signal of a monitoring module, obtaining working parameters of the laser cutting machine when the row line alarm signal is obtained, and judging and analyzing the laser cutting machine;
and step 3: when an adjusting signal of the laser cutting machine is received, acquiring processing standard size data and size measurement data, and subtracting to obtain an absolute value to obtain a measurement error value Cc: then, the measurement error value Cc and the stabilized value Zw of the laser cutting machine are substituted into the formula
Calculating to obtain a corrected error value Xw;
sending the obtained correction error value Xw to a processor of the laser cutting machine, and correcting the amplitude of the laser cutting machine;
and 4, step 4: the cutting path is provided with a plurality of cutting breakpoints, when the laser cutting machine moves along the cutting path, when the laser cutting machine reaches the positions of the cutting breakpoints, the current breakpoint information is obtained and sent to the laser cutting machine, and secondary cutting is carried out at the breakpoints;
and 5: and in the cutting process, obtaining the cutting parameter value of the laser cutting machine, monitoring the cutting parameter value in real time, and judging whether the cutting danger exists.
As a further scheme of the invention: in step 1, the specific working process is as follows:
step 11: acquiring a row line deviation value of the laser cutting machine along a steel plate cutting path through a data acquisition module, wherein the row line deviation value is a difference value between an actual walking path of the laser cutting machine and a preset cutting path and is marked as Xp;
step 12: acquiring a row line deviation value range, and if the row line deviation value Xp is within the row line deviation value range, not performing any operation; if the row line deviation value Xp is not within the row line deviation value range, acquiring a preset cutting path of the steel plate, dividing the cutting path into three sub-regions along the width direction by taking the cutting path as a datum line, and respectively marking the sub-regions as X1, X2 and X3; wherein the X2 sub-region is located between the X1 sub-region and the X3 sub-region.
As a further scheme of the invention: if the cutting nozzle of the laser cutting machine is located in the X2 sub-area, generating a row line normal signal, if the cutting nozzle of the laser cutting machine is located in the X1 and X3 sub-areas, generating a row line alarm signal, and if the cutting nozzle of the laser cutting machine is not located in the X1, X2 and X3 sub-areas, generating a row line scrapping signal.
As a further scheme of the invention: in step 2, the specific working process is as follows:
step 21: acquiring a preset cutting path of a steel plate, and taking the cutting path as a datum line; constructing a rectangular coordinate system based on the steel plate, substituting a real-time cutting path into the rectangular coordinate system provided with the reference line of the cutting path, and then obtaining 7 an area enclosed by the reference line on line and marking as Sq;
acquiring an amplitude value of the laser cutting machine when the laser cutting machine cuts the steel plate, and marking the amplitude value as Fq;
step 22: substitution formula
Calculating to obtain a stable value Zw of the laser cutting machine; wherein a1 and a2 are proportionality coefficients, a1 is 0.254, and a2 is 0.654;
and step 3: and comparing the obtained stable value Zw of the laser cutting machine with the stable threshold value of the laser cutting machine.
As a further scheme of the invention: if the stability value Zw of the laser cutting machine is larger than the stability threshold value of the laser cutting machine, generating a large vibration amplitude signal of the laser cutting machine, and needing to overhaul the laser cutting machine;
and if the stability value Zw of the laser cutting machine is smaller than the stability threshold value of the laser cutting machine, generating a small vibration amplitude of the laser cutting machine, continuing to work, and generating an adjustment signal of the laser cutting machine.
As a further scheme of the invention: in step 4, the breakpoint information comprises a breakpoint size value and a breakpoint outgoing line track, the breakpoint size value is controlled to be 8-12mm, and the breakpoint outgoing line track is arc-shaped.
As a further scheme of the invention: in step 5, the specific working process is as follows:
step 51: acquiring a height value and a height amplitude value of a cutting nozzle of the laser cutting machine, and respectively marking the height value and the height amplitude value as Gj and Fj; meanwhile, a cutting speed value of the laser cutting machine is obtained and marked as Vj;
step 52: by the formula
Calculating to obtain a danger value Zw of the laser cutting machine;
step 53: and comparing the obtained danger value Zw of the laser cutting machine with the danger threshold value of the laser cutting machine.
As a further scheme of the invention: if the danger value Zw of the laser cutting machine is larger than the danger threshold value of the laser cutting machine, generating a danger signal of the laser cutting machine;
and if the danger value Zw of the laser cutting machine is smaller than the danger threshold value of the laser cutting machine, generating a safety signal of the laser cutting machine.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device perform real-time monitoring through the row line information of the laser cutting machine, ensure that the cutting line is in a normal process range, and avoid the problem that the cutting defect rate of the product is too high due to large cutting deviation; judging the amplitude of the laser cutting machine through the stable value of the laser cutting machine, and when the amplitude is too small, correcting errors of the laser cutting machine to ensure normal operation of the laser cutting machine;
the cutting is ensured to be smoothly carried out through the breakpoint module, and an operator does not need to stare at the cutting gun to work; the arc leading-in lead-out wire can ensure the surface quality of the end face of the steel plate at the joint; and the height value and the cutting speed of a cutting nozzle of the laser cutting machine are monitored in real time through the alarm module, so that the laser cutting machine is ensured to be in a safe working range, and the cutting quality of the steel plate is improved.
Drawings
To facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a block diagram of the system of the present invention.
Fig. 2 is a schematic structural diagram of a cutting breakpoint in the present invention.
Fig. 3 is a partially enlarged view of the point E in fig. 2 according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
Example 1
Referring to fig. 1-3, the invention relates to a laser cutting deformation prevention system, which comprises an acquisition module, a monitoring module, an analysis unit, an error correction module, a breakpoint module and an alarm module;
the collection module is used for gathering laser cutting machine's row line information, sends laser cutting machine's row line information to monitoring module, and monitoring module is used for monitoring laser cutting machine's row line route, and the monitoring step specifically as follows:
step 1: acquiring a row line deviation value of the laser cutting machine along a steel plate cutting path through a data acquisition module, wherein the row line deviation value is a difference value between an actual walking path of the laser cutting machine and a preset cutting path and is marked as Xp;
step 2: acquiring a row line deviation value range, and if the row line deviation value Xp is within the row line deviation value range, not performing any operation; if the row line deviation value Xp is not within the range of row line deviation values,
acquiring a preset cutting path of the steel plate, dividing the cutting path into three sub-regions along the width direction by taking the cutting path as a datum line, and respectively marking the sub-regions as X1, X2 and X3; wherein the X2 sub-region is located between the X1 sub-region and the X3 sub-region;
if the cutting nozzle of the laser cutting machine is positioned in an X2 sub-area, generating a row line normal signal, enabling the cutting of the steel plate to meet the process standard, continuing to execute the next cutting work, if the cutting nozzle of the laser cutting machine is positioned in the X1 and X3 sub-areas, generating a row line alarm signal, if the cutting nozzle of the laser cutting machine is not positioned in the X1, X2 and X3 sub-areas, generating a row line scrap signal, enabling the cutting of the steel plate to not meet the process standard, and not executing the next cutting work;
the analysis module is used for acquiring a row line normal signal, a row line alarm signal and a row line scrapping signal of the monitoring module, acquiring working parameters of the laser cutting machine when the row line alarm signal is acquired, and judging and analyzing the laser cutting machine;
the analysis module specifically works as follows:
step 1: acquiring a preset cutting path of a steel plate, and taking the cutting path as a datum line; constructing a rectangular coordinate system based on the steel plate, substituting the real-time cutting path into the rectangular coordinate system provided with the reference line of the cutting path, then obtaining 7 an area enclosed by the reference line on line, and marking the area as Sq;
acquiring an amplitude value of the laser cutting machine when cutting the steel plate, and marking the amplitude value as Fq;
step 2: substitution formula
Calculating to obtain a stable value Zw of the laser cutting machine; wherein a1 and a2 are proportional coefficients, a1 is 0.254, and a2 is 0.654;
and 3, step 3: comparing the obtained stable value Zw of the laser cutting machine with a stable threshold value of the laser cutting machine:
if the stability value Zw of the laser cutting machine is greater than the stability threshold value of the laser cutting machine, the generated vibration amplitude of the laser cutting machine is large, the laser cutting machine needs to be overhauled, otherwise, the cutting nozzle is greatly deviated in the subsequent cutting process, so that the cutting error of the steel plate is caused, the steel plate cannot reach the process standard, and the product yield is low;
if the stability value Zw of the laser cutting machine is smaller than the stability threshold value of the laser cutting machine, the generated vibration amplitude of the laser cutting machine is small, the working error is met, the laser cutting machine can continue to work, and an adjustment signal of the laser cutting machine is generated;
and the error correction module is used for acquiring processing standard size data and size measurement data when receiving the adjustment signal of the laser cutting machine, and subtracting and taking an absolute value to obtain a measurement error value Cc: then, the measurement error value Cc and the stabilized value Zw of the laser cutting machine are substituted into the formula
Calculating to obtain a corrected error value Xw; wherein b1 and b2 are proportional coefficients, b1 is 1.20, and b2 is 1.05;
sending the obtained correction error value Xw to a processor of the laser cutting machine, and correcting the amplitude of the laser cutting machine;
the breakpoint module is provided with a plurality of cutting breakpoints on the cutting path, moves along the cutting path when the laser cutting machine reaches the cutting breakpoint position, acquires current breakpoint information, sends the breakpoint information to the laser cutting machine, and performs secondary cutting at the breakpoint position;
the breakpoint information comprises a breakpoint size value and a breakpoint lead-out line track, the breakpoint size value is controlled to be 8-12mm, and the breakpoint lead-out line track is arc-shaped;
the breakpoint module ensures that the cutting is carried out smoothly without needing an operator to stare the cutting gun to work; the arc leading-in lead-out wire can ensure the surface quality of the end face of the steel plate at the joint;
the laser cutting machine further comprises an alarm module, a control module and a control module, wherein the alarm module is used for acquiring the cutting parameter value of the laser cutting machine, monitoring the cutting parameter value in real time and judging whether the cutting danger exists or not;
the alarm module comprises the following steps:
step 1: acquiring a height value and a height amplitude value of a cutting nozzle of the laser cutting machine, and respectively marking the height value and the height amplitude value as Gj and Fj; meanwhile, obtaining a cutting speed value of the laser cutting machine, and marking the cutting speed value as Vj;
step 2: by the formula
Calculating to obtain the danger of the laser cutting machineA risk value Zw; wherein c1, c2 and c3 are proportionality coefficients, c1 is 0.842, c2 is 1.95 and c3 is 0.954;
and step 3: comparing the obtained danger value Zw of the laser cutting machine with a danger threshold value of the laser cutting machine:
if the danger value Zw of the laser cutting machine is larger than the danger threshold value of the laser cutting machine, generating a danger signal of the laser cutting machine;
if the danger value Zw of the laser cutting machine is smaller than the danger threshold value of the laser cutting machine, generating a safety signal of the laser cutting machine;
the alarm module monitors the height value and the cutting speed of the cutting nozzle of the laser cutting machine in real time, so that the laser cutting machine is ensured to be in a safe working range, and the cutting quality of a steel plate is improved; the steel plate for solving the problem of numerical control cutting processing is a flat-opening winding plate, and residual stress is arranged in the steel plate after the steel plate is flat-opening. During cutting, the internal stress is released, and the part deforms; when laser cutting is carried out, the distance between the cutting nozzle and the steel plate is 1mm-3mm, and when the steel plate deforms excessively, the cutting nozzle is often collided, so that the work is interrupted, and even the cutting nozzle is burnt; the cutting operator stares the machine to operate, the cutting speed is high, the reaction is often not timely, the arc starting cutting needs to be carried out again, and a plurality of craters are formed on the edge of the part to influence the appearance; meanwhile, the laser cutting brightness is high, so that the discomfort of eyes can be caused, and the safety production is influenced.
Example 2
Based on the embodiment 1, the laser cutting deformation prevention process comprises the following steps:
step 1: collecting the row line information of the laser cutting machine, and sending the row line information of the laser cutting machine to a monitoring module, wherein the monitoring module is used for monitoring the row line path of the laser cutting machine;
step 2: acquiring a normal row line signal, a row line alarm signal and a row line scrapping signal of a monitoring module, acquiring working parameters of the laser cutting machine when the row line alarm signal is acquired, and judging and analyzing the laser cutting machine;
and step 3: when receiving the laser cutting machine adjusting signal, acquiring a processing targetAnd (3) calibrating the size data and the size measurement data, and subtracting to obtain an absolute value to obtain a measurement error value Cc: then, the measurement error value Cc and the stabilized value Zw of the laser cutting machine are substituted into the formula
Calculating to obtain a corrected error value Xw; wherein b1 and b2 are proportional coefficients, b1 is 1.20, and b2 is 1.05;
sending the obtained corrected error value Xw to a processor of the laser cutting machine, and correcting the amplitude of the laser cutting machine;
and 4, step 4: the method comprises the following steps that a plurality of cutting breakpoints are arranged on a cutting path, when a laser cutting machine moves along the cutting path and reaches the positions of the cutting breakpoints, current breakpoint information is obtained and sent to the laser cutting machine, and secondary cutting is carried out at the positions of the breakpoints;
and 5: and in the cutting process, obtaining the cutting parameter value of the laser cutting machine, monitoring the cutting parameter value in real time, and judging whether a cutting danger exists.
The working principle of the invention is as follows: the method and the device perform real-time monitoring through the row line information of the laser cutting machine, ensure that the cutting line is in a normal process range, and avoid the problem that the cutting defect rate of the product is too high due to large cutting deviation; judging the amplitude of the laser cutting machine through the stable value of the laser cutting machine, and when the amplitude is too small, correcting the error of the laser cutting machine to ensure the normal operation of the laser cutting machine;
the cutting is ensured to be smoothly carried out through the breakpoint module, and an operator does not need to stare at the cutting gun to work; the arc leading-in lead-out wire can ensure the surface quality of the end face of the steel plate at the joint; and the height value and the cutting speed of a cutting nozzle of the laser cutting machine are monitored in real time through the alarm module, so that the laser cutting machine is ensured to be in a safe working range, and the cutting quality of the steel plate is improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The laser cutting deformation prevention process is characterized by comprising the following steps of:
step 1: collecting the row line information of the laser cutting machine, sending the row line information of the laser cutting machine to the monitoring module, the monitoring module is used for monitoring a row line path of the laser cutting machine;
step 2: acquiring a normal row line signal, a row line alarm signal and a row line scrapping signal of a monitoring module, acquiring working parameters of the laser cutting machine when the row line alarm signal is acquired, and judging and analyzing the laser cutting machine;
and step 3: when an adjusting signal of the laser cutting machine is received, acquiring processing standard size data and size measurement data, and subtracting to obtain an absolute value to obtain a measurement error value Cc: then, the measurement error value Cc and the stabilized value Zw of the laser cutting machine are substituted into the formula
Calculating to obtain a corrected error value Xw;
sending the obtained corrected error value Xw to a processor of the laser cutting machine, and correcting the amplitude of the laser cutting machine;
and 4, step 4: the cutting path is provided with a plurality of cutting breakpoints, when the laser cutting machine moves along the cutting path, when the laser cutting machine reaches the positions of the cutting breakpoints, the current breakpoint information is obtained and sent to the laser cutting machine, and secondary cutting is carried out at the breakpoints;
and 5: and in the cutting process, obtaining the cutting parameter value of the laser cutting machine, monitoring the cutting parameter value in real time, and judging whether the cutting danger exists.
2. The laser cutting deformation prevention process according to claim 1, wherein in the step 1, the specific working process is as follows:
step 11: acquiring a row line deviation value of the laser cutting machine along a steel plate cutting path through a data acquisition module, wherein the row line deviation value is a difference value between an actual walking path of the laser cutting machine and a preset cutting path and is marked as Xp;
step 12: acquiring a row line deviation value range, and if the row line deviation value Xp is within the row line deviation value range, not performing any operation; if the row line deviation value Xp is not within the row line deviation value range, acquiring a preset cutting path of the steel plate, dividing the cutting path into three sub-regions along the width direction by taking the cutting path as a datum line, and respectively marking the sub-regions as X1, X2 and X3; wherein the X2 sub-region is located between the X1 sub-region and the X3 sub-region.
3. The laser cutting deformation prevention process according to claim 2, wherein a row line normal signal is generated if a cutting torch of the laser cutting machine is in an X2 sub-area, a row line alarm signal is generated if the cutting torch of the laser cutting machine is in X1 and X3 sub-areas, and a row line rejection signal is generated if none of the cutting torches of the laser cutting machine is in the X1, X2 and X3 sub-areas.
4. The laser cutting deformation prevention process according to claim 1, wherein in the step 2, the specific working process is as follows:
step 21: acquiring a preset cutting path of a steel plate, and taking the cutting path as a datum line; constructing a rectangular coordinate system based on the steel plate, substituting the real-time cutting path into the rectangular coordinate system provided with the reference line of the cutting path, then obtaining 7 an area enclosed by the reference line on line, and marking the area as Sq;
acquiring an amplitude value of the laser cutting machine when the laser cutting machine cuts the steel plate, and marking the amplitude value as Fq;
step 22: substitution formula
Calculating to obtain a stable value Zw of the laser cutting machine; wherein a1 and a2 are proportionality coefficients, a1 is 0.254, and a2 is 0.654;
and step 3: and comparing the obtained stable value Zw of the laser cutting machine with the stable threshold value of the laser cutting machine.
5. The laser cutting deformation prevention process according to claim 4, wherein if the stability value Zw of the laser cutting machine is greater than the stability threshold value of the laser cutting machine, a large vibration amplitude signal of the laser cutting machine is generated, and the laser cutting machine needs to be overhauled;
and if the stability value Zw of the laser cutting machine is smaller than the stability threshold value of the laser cutting machine, generating a small vibration amplitude of the laser cutting machine, continuing to work, and generating an adjustment signal of the laser cutting machine.
6. The laser cutting deformation preventing process according to claim 1, wherein in the step 4, the breakpoint information includes a breakpoint size value and a breakpoint lead-out line trajectory, the breakpoint size value is controlled to be 8-12mm, and the breakpoint lead-out line trajectory is in the shape of an arc.
7. The laser cutting deformation prevention process according to claim 1, wherein in the step 5, the specific working process is as follows:
step 51: acquiring a height value and a height amplitude value of a cutting nozzle of the laser cutting machine, and respectively marking the height value and the height amplitude value as Gj and Fj; meanwhile, obtaining a cutting speed value of the laser cutting machine, and marking the cutting speed value as Vj;
step 52: by the formula
Calculating to obtain a danger value Zw of the laser cutting machine;
step 53: and comparing the danger value Zw of the laser cutting machine with the danger threshold value of the laser cutting machine.
8. The laser cutting deformation prevention process according to claim 7, wherein if the hazard value Zw of the laser cutter is greater than the hazard threshold value of the laser cutter, a hazard signal of the laser cutter is generated;
and if the danger value Zw of the laser cutting machine is smaller than the danger threshold value of the laser cutting machine, generating a safety signal of the laser cutting machine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116493777A (en) * | 2023-05-12 | 2023-07-28 | 济南奥镭数控设备有限公司 | Numerical control cutting machine remote control system based on intelligent operation |
| CN117817084A (en) * | 2024-01-08 | 2024-04-05 | 江西瑞升科技股份有限公司 | Control method and system for cutting latticed metal by air plasma cutting machine |
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2022
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116493777A (en) * | 2023-05-12 | 2023-07-28 | 济南奥镭数控设备有限公司 | Numerical control cutting machine remote control system based on intelligent operation |
| CN116493777B (en) * | 2023-05-12 | 2024-03-29 | 济南奥镭数控设备有限公司 | Numerical control cutting machine remote control system based on intelligent operation |
| CN117817084A (en) * | 2024-01-08 | 2024-04-05 | 江西瑞升科技股份有限公司 | Control method and system for cutting latticed metal by air plasma cutting machine |
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