Cutting control method, device and storage medium

Abstract

The application discloses a cutting control method, equipment and storage medium. First, the cutting head is controlled to descend to an ignition height, ignition gas is sprayed to a workpiece according to a first open gas signal, and an ignition laser beam is output according to a first open light signal, so that a high-temperature spark on the surface of the workpiece ignites the ignition gas to form an ignition flame; then, the cutting head is controlled to ascend to a piercing height, piercing gas is sprayed to the workpiece according to a second open gas signal to switch the ignition flame to a piercing flame, and a piercing laser beam is output according to a second open light signal, so that the piercing flame and the piercing laser beam jointly pierce the workpiece. The ignition stage is performed at a lower height, the laser beam acts on the surface of the workpiece at a short distance to generate a high-temperature spark, the ignition is ensured to be fast and reliable, the piercing preheating time is significantly shortened, the cutting efficiency is improved, the burning of the high-temperature flame on the nozzle of the cutting head is reduced, and the loss of the nozzle is reduced; the piercing process is performed at the height after the ascending, the molten material is prevented from splashing and blocking the cutting nozzle, and the piercing smoothness is ensured.

Description

Technical Field

[0001] This application relates to the field of cutting and processing technology, and in particular to a cutting control method, equipment and storage medium. Background Technology

[0002] Flame cutting is widely used in the processing of thick plates, but its heat source power density is limited, making it impossible to heat and melt the plate quickly. Before piercing, it is necessary to preheat at a fixed point for a long time and burn continuously to melt the material. The time taken can be tens of seconds to several minutes as the plate thickness increases, resulting in low piercing efficiency and severely restricting cutting efficiency. At the same time, prolonged high-temperature burning also aggravates the thermal damage to the cutting nozzle and increases nozzle wear. Summary of the Invention

[0003] In view of the shortcomings of the prior art, this application provides a cutting control method, device and storage medium, which can effectively shorten the preheating time of flame piercing and improve piercing efficiency, thereby improving cutting efficiency. On the other hand, it can reduce the time of nozzle burning during piercing and reduce nozzle wear.

[0004] To address the aforementioned technical problems, this application discloses, in a first aspect, a cutting control method, comprising the following steps: Control the cutting head to descend to the preset ignition height; According to the first gas-opening signal, the cutting head is controlled to spray ignition gas onto the workpiece, and according to the first light-opening signal, the cutting head is controlled to output an ignition laser beam onto the surface of the workpiece to generate a high-temperature spark on the surface of the workpiece. The high-temperature spark ignites the ignition gas to form an ignition flame. Control the cutting head to rise to the preset perforation height; According to the second gas-opening signal, the cutting head is controlled to spray perforating gas onto the workpiece, so that the ignition flame is switched to a perforating flame. According to the second light-opening signal, the cutting head is controlled to output a perforating laser beam onto the surface of the workpiece. The perforating flame and the perforating laser beam perforate the workpiece together.

[0005] As an optional implementation, in this embodiment of the application, the preset ignition height L1 is 10mm~20mm, and the preset perforation height L2 is 30mm~120mm.

[0006] As an optional implementation, in this embodiment of the application, the first gas opening signal includes a first gas switch control signal and a first gas pressure control signal, wherein the first gas switch control signal controls the output of the ignition gas, and the first gas pressure control signal controls the gas pressure of the ignition gas; The first switching signal includes a first laser switch control signal and a first laser power control signal. The first laser switch control signal controls the output of the ignition laser beam, and the first laser control signal controls the power of the ignition laser beam.

[0007] As an optional implementation, in this embodiment of the application, the second gas opening signal includes a second gas switch control signal and a second gas pressure control signal. The second gas switch control signal controls the output of the perforating gas, and the second gas pressure control signal controls the gas pressure of the perforating gas. The second switching signal includes a second laser switch control signal and a second laser power control signal. The second laser switch control signal controls the output of the perforated laser beam, and the second switching signal controls the power of the perforated laser beam.

[0008] As an optional implementation, in this embodiment of the application, the pressure of the perforating gas is greater than the pressure of the ignition gas, and the laser power of the perforating laser beam is greater than the laser power of the ignition laser beam.

[0009] As an optional implementation, in this embodiment of the application, after the step of the perforating flame and the perforating laser beam jointly perforating the workpiece, the following step is further included: According to the third gas-opening signal, the cutting head is controlled to spray cutting gas onto the workpiece, so that the perforating flame is switched to a cutting flame. According to the third light-opening signal, the cutting head outputs a cutting laser beam onto the surface of the workpiece, and the cutting flame and the cutting laser beam cut the workpiece together.

[0010] As an optional implementation, in this embodiment, after the steps of controlling the cutting head to spray cutting gas onto the workpiece according to the third gas-on signal and outputting a cutting laser beam onto the workpiece surface according to the third light-on signal, the following steps are further included: After the cutting is completed, the cutting head is controlled to stop outputting the cutting laser beam and the cutting gas.

[0011] Secondly, embodiments of this application disclose a cutting device, including: The system comprises a control system, a fiber laser, a gas output module, and a cutting head. The control system is electrically connected to the fiber laser and the gas output module, respectively. The fiber laser and the gas output module are respectively connected to the cutting head. The control system is also used to control the lifting and lowering movement of the cutting head. After the control system controls the cutting head to descend to a preset ignition height, it sends a first gas-on signal to the gas output module to control the gas output module to output ignition gas to the cutting head; and sends a first light-on signal to the fiber laser to control the fiber laser to output an ignition laser beam to the cutting head, so that the cutting head sprays ignition gas onto the workpiece surface and outputs an ignition laser beam at the ignition height. After the control system controls the cutting head to rise to a preset perforation height, it sends a second gas-on signal to the gas output module to control the gas output module to output perforation gas to the cutting head; and sends a second light-on signal to the fiber laser to control the fiber laser to output a perforation laser beam to the cutting head, so that the cutting head sprays perforation gas onto the workpiece surface at the perforation height and outputs a perforation laser beam.

[0012] As an optional implementation, in this embodiment of the application, the control system includes a main controller and a secondary controller; The main controller is used to control the lifting and lowering movement of the cutting head; The secondary controller is electrically connected to the fiber laser and the gas output module respectively. After the main controller controls the cutting head to descend to the ignition height, it automatically sends the first gas-on signal to the gas output module and the first light-on signal to the fiber laser to perform the ignition action. The main controller is also used to send a perforation start signal to the sub-controller after ignition is completed; the sub-controller sends a second gas opening signal to the gas output module and a second light opening signal to the fiber laser according to the perforation start signal.

[0013] As an optional implementation, in this embodiment of the application, the sub-controller is further configured to send a third gas-opening signal to the gas output module after the piercing is completed, so as to control the gas output module to output cutting gas to the cutting head; and to send a third light-opening signal to the fiber laser, so as to control the fiber laser to output a cutting laser beam to the cutting head; The main controller is also used to control the cutting head to move along a preset cutting path to cut the workpiece after receiving the piercing end signal output by the sub-controller.

[0014] Thirdly, embodiments of this application disclose a computer-readable storage medium storing a computer program thereon, characterized in that the computer program stored in the storage medium implements the steps of the cutting control method as described above when executed by a processor.

[0015] This application provides a cutting control method, device, and storage medium. First, the cutting head is lowered to a preset ignition height. Then, ignition gas is injected into the workpiece according to a first gas-on signal, and an ignition laser beam is output to the workpiece surface according to a first light-on signal. High-temperature sparks are generated on the workpiece surface, and these sparks ignite the ignition gas to form an ignition flame. This ignition stage is performed at a relatively low ignition height, allowing the laser beam to act closely on the workpiece surface to generate high-temperature sparks, ensuring rapid and reliable ignition and quick flame establishment. This effectively overcomes the shortcomings of traditional flame cutting, which requires prolonged fixed-point preheating due to insufficient heat source power density, and significantly shortens the cutting time. The reduced preheating time improves cutting efficiency, while the shortened piercing time reduces the burning of the cutting head nozzle by the high-temperature flame, effectively reducing nozzle wear. Subsequently, the cutting head is raised to the preset piercing height, and piercing gas is injected into the workpiece according to the second gas-on signal to switch the ignition flame to a piercing flame. At the same time, a piercing laser beam is output to the workpiece surface according to the second light-on signal, so that the piercing flame and the piercing laser beam work together on the workpiece to achieve composite heating of laser and flame, and complete the piercing process. The piercing process is carried out at the raised piercing height, which avoids molten material splashing and clogging the cutting nozzle during the piercing process, ensuring smooth piercing. Attached Figure Description

[0016] Figure 1 Flowchart of the cutting control method provided in this application Figure 1 .

[0017] Figure 2 Flowchart of the cutting control method provided in this application Figure 2 Figure 3 Flowchart of the cutting control method provided in this application Figure 3 .

[0018] Figure 4 A structural block diagram of the secondary controller for the cutting equipment provided in this application, which controls the light and fire output.

[0019] Figure 5 The signal interaction diagram of the main controller and the auxiliary controller of the cutting equipment provided in this application.

[0020] Among them, 11-main controller; 12-secondary controller; 20-fiber laser; 30-gas output module; 31-gas source; 32-proportional valve; 40-cutting head. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following detailed description of this application is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application. Unless further described, elements, structures, and features in one embodiment may be advantageously combined with other embodiments.

[0022] It should be noted that when a metastructure is referred to as "fixed to" or "set on" another metastructure, it can be directly on or indirectly on that other metastructure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0023] The terms "length," "width," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to constitute an infringement. The instruction or implication refers to a device or component that must have a specific orientation, be constructed and operated in a specific orientation.

[0024] Example 1 Please see Figure 1 This embodiment discloses a cutting control method, including the following steps: Step S1: Control the cutting head to descend to the preset ignition height; Step S2: Control the cutting head to spray ignition gas onto the workpiece according to the first gas opening signal, and control the cutting head to output an ignition laser beam onto the workpiece surface according to the first light opening signal, so as to generate a high-temperature spark on the workpiece surface. The high-temperature spark ignites the ignition gas to form an ignition flame. Step S3: Control the cutting head to rise to the preset perforation height; Step S4: Control the cutting head to spray perforating gas onto the workpiece according to the second gas opening signal, so that the ignition flame is switched to a perforating flame. Control the cutting head to output a perforating laser beam onto the surface of the workpiece according to the second light opening signal. The perforating flame and the perforating laser beam perforate the workpiece together.

[0025] This invention provides a cutting control method. First, the cutting head is lowered to a preset ignition height. Then, ignition gas is injected into the workpiece according to a first gas-on signal, and an ignition laser beam is output to the workpiece surface according to a first light-on signal. High-temperature sparks are generated on the workpiece surface, and these sparks ignite the ignition gas to form an ignition flame. This ignition stage is performed at a relatively low ignition height, allowing the laser beam to act on the workpiece surface at close range to generate high-temperature sparks, ensuring rapid and reliable ignition and quick flame establishment. This effectively overcomes the shortcomings of traditional flame cutting, which requires prolonged fixed-point preheating due to insufficient heat source power density, and significantly shortens the preheating time for piercing. This process improves cutting efficiency. Simultaneously, the reduced piercing time decreases the burning effect of the high-temperature flame on the cutting head nozzle, effectively reducing nozzle wear. The cutting head is then raised to a preset piercing height, and piercing gas is injected into the workpiece according to the second gas-on signal to switch the ignition flame to a piercing flame. At the same time, a piercing laser beam is output to the workpiece surface according to the second light-on signal, allowing the piercing flame and the piercing laser beam to work synergistically on the workpiece, achieving combined laser and flame heating to complete the piercing process. The piercing process is carried out at the raised piercing height, preventing molten material from splashing and clogging the cutting nozzle, ensuring smooth piercing.

[0026] The following is a detailed explanation of each step: Step S1: Control the cutting head to descend to the preset ignition height.

[0027] In this embodiment, the preset ignition height L1 is 10mm~20mm, where the ignition height L1 can be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, etc., and is not limited here. The setting of this ignition height range is based on a comprehensive consideration of ignition reliability and equipment safety. If the ignition height is too low (less than 10mm), the distance between the cutting head and the workpiece is too small, and the high-temperature sparks and molten material generated at the moment of ignition are very likely to splash back to the cutting head nozzle, causing nozzle blockage or damage. At the same time, the small distance is not conducive to the full mixing of ignition gas and surrounding air, which will affect the ignition effect. If the ignition height is too high (greater than 20mm), the energy density of the laser beam reaching the workpiece surface will decrease too much, making it difficult to generate enough high-temperature sparks on the workpiece surface to ignite the ignition gas, resulting in ignition failure or ignition delay. Limiting the ignition height to between 10mm and 20mm ensures that the laser beam generates sufficient heat on the workpiece surface to produce a high-temperature spark, enabling rapid and reliable ignition, while also preventing the high-temperature molten material from splashing back and damaging the nozzle during piercing.

[0028] Step S2: Control the cutting head to spray ignition gas onto the workpiece according to the first gas opening signal, and control the cutting head to output an ignition laser beam onto the workpiece surface according to the first light opening signal, so as to generate a high-temperature spark on the workpiece surface. The high-temperature spark ignites the ignition gas to form a flame.

[0029] In some embodiments, the first gas-on signal includes a first gas switch control signal and a first gas pressure control signal. The first gas switch control signal controls the output of the ignition gas, and the first gas pressure control signal controls the gas pressure of the ignition gas. This design, by dividing the gas-on signal into two dimensions—switch control and pressure control—enables independent management of the ignition gas output and adjustment of its pressure. Specifically, by controlling the ignition gas pressure at a lower level through the first gas pressure control signal, it ensures that the ignition gas fully reaches the workpiece surface to participate in the combustion reaction, while preventing excessively high pressure from scattering the high-temperature spark. This ensures that the spark stably adheres to the workpiece surface to successfully ignite the ignition gas, thereby effectively improving the ignition success rate and the stability of flame formation.

[0030] Furthermore, the ignition gas includes ignition fuel gas and ignition-assisted oxygen. Using a combination of ignition fuel gas and ignition-assisted oxygen as the ignition gas allows for a rapid and intense oxidation combustion reaction under the high-temperature spark generated by the ignition laser beam, instantly forming a high-temperature, high-energy ignition flame. This heats the workpiece surface to its ignition point in a very short time, significantly improving the speed and reliability of ignition. The combined combustion of fuel gas and oxygen also enhances the flame's resistance to interference, maintaining stable combustion even under slight airflow disturbances, ensuring the smooth completion of the ignition process.

[0031] In some embodiments, the first switching signal includes a first laser switch control signal and a first laser power control signal. The first laser switch control signal controls the output of the ignition laser beam, and the first laser control signal controls the power of the ignition laser beam. This design decomposes the switching signal into switch control and power control, enabling precise control of the laser beam's start / stop and energy output according to ignition requirements. During the ignition phase, the first laser power control signal sets the laser power to a moderately low level, generating sufficient high-temperature sparks to ignite the ignition gas while avoiding excessive power that could lead to excessive ablation of the workpiece surface or the generation of spatter. This ensures a gentle and controllable ignition process, reduces energy consumption during the ignition phase, and minimizes the thermal impact on the workpiece surface.

[0032] Step S3: Control the cutting head to rise to the preset perforation height.

[0033] In this embodiment, the preset perforation height L2 is 30mm~120mm. The perforation height L2 can be 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, etc., and is not limited here. This perforation height range is set based on a comprehensive consideration of perforation efficiency, nozzle protection, and molten material removal. If the perforation height is too low (less than 30mm), the distance between the cutting head and the workpiece is too small, resulting in a large amount of high-temperature molten material splashing during perforation, which can easily clog or burn the nozzle. At the same time, too small a distance is also not conducive to the auxiliary gas fully acting on the perforation area, and the molten material cannot be effectively blown away, thus affecting perforation efficiency. If the perforation height is too high (greater than 120mm), the energy density of the laser beam reaching the workpiece surface attenuates too much, and the perforation flame is difficult to concentrate on the workpiece surface, significantly reducing heat source utilization and leading to prolonged perforation time or even failure to melt through the material. By limiting the piercing height to between 30mm and 120mm, it is possible to ensure that the laser energy density and the piercing flame are concentrated on the workpiece surface to achieve efficient and rapid piercing, while also leaving sufficient space for the splashing and blowing away of molten material, effectively protecting the cutting nozzle from damage.

[0034] Step S4: Control the cutting head to spray perforating gas onto the workpiece according to the second gas opening signal, so that the ignition flame is switched to a perforating flame. Control the cutting head to output a perforating laser beam onto the workpiece surface according to the second light opening signal. The perforating flame and the perforating laser beam perforate the workpiece together.

[0035] In some embodiments, the second gas-on signal includes a second gas switch control signal and a second gas pressure control signal. The second gas switch control signal controls the output of the perforating gas, and the second gas pressure control signal controls the gas pressure of the perforating gas. This design, by dividing the gas-on signal into two dimensions—switch control and pressure control—enables independent management of the on / off state of the perforating gas output and independent adjustment of its pressure. Specifically, the second gas pressure control signal sets the perforating gas pressure to a higher value to meet the high-pressure gas requirements of the perforation process. The high-pressure gas can quickly blow the molten metal formed by laser melting away from the perforation area, preventing slag accumulation that hinders laser penetration, thereby effectively shortening the perforation time and improving perforation efficiency.

[0036] The pressure of the perforating gas is greater than that of the ignition gas. The pressure requirements differ between the ignition and perforation stages. In the ignition stage, the laser energy is lower and the cutting head is closer to the workpiece, so low pressure is sufficient for stable spark ignition. However, in the perforation stage, the increased cutting head height leads to a longer gas delivery distance, and perforation itself is the most challenging and prone to overheating and bursting defects in thick plate cutting, requiring stronger slag-blowing power to remove molten metal promptly. Therefore, setting the perforation gas pressure higher than the ignition gas pressure, and using the same gas path system to output differentiated pressures at different stages, ensures both the stability and safety of the ignition stage while meeting the high-pressure slag-blowing requirements of the perforation stage. This effectively solves the technical problem of being unable to simultaneously address ignition and perforation due to a single gas pressure.

[0037] Furthermore, the perforation gas includes perforation fuel gas and perforation-assisted oxygen. Using a combination of perforation fuel gas and auxiliary oxygen as the perforation gas allows for the release of additional chemical energy through the oxygen-assisted combustion reaction while the perforation laser beam heats the workpiece. This rapidly raises the temperature of the perforation area to the material's vaporization point, accelerating the generation and discharge of molten metal and significantly increasing the perforation speed. The fuel gas composition also regulates the reducing atmosphere of the flame, reducing oxidation reactions on the workpiece surface during perforation and improving the surface quality of the perforated area.

[0038] In some embodiments, the second switching signal includes a second laser switch control signal and a second laser power control signal. The second laser switch control signal controls the output of the perforating laser beam, and the second switching signal controls the power of the perforating laser beam. This design decomposes the switching signal into switch control and power control, enabling precise control of the laser beam's start / stop and energy output according to perforation requirements. During the perforation stage, the second laser power control signal boosts the laser power to a higher level, allowing the workpiece surface to absorb sufficient energy in a short time to reach melting or even vaporization temperatures, achieving rapid penetration. Simultaneously, it avoids insufficient power causing perforation stagnation or excessive power causing excessive ablation of the workpiece's back side, ensuring an efficient and controllable perforation process.

[0039] The laser power of the perforating laser beam is greater than that of the ignition laser beam. Setting the perforating laser power higher than the ignition laser power allows for two key differences: firstly, during the ignition stage, a lower power spark is sufficient to meet the ignition requirements, avoiding energy waste and unnecessary thermal damage to the workpiece surface; secondly, during the perforation stage, a high-power laser provides sufficient energy density to rapidly melt the workpiece material and allow it to be blown away by high-pressure gas, achieving a smooth transition from gentle ignition to powerful perforation. This phased power differentiation control strategy balances the safety of ignition with the speed of perforation, which is beneficial for optimizing the overall processing rhythm and workpiece quality.

[0040] This invention achieves automated control of the piercing process by pre-setting the laser power and gas parameters for the piercing stage. This effectively overcomes the drawbacks of traditional flame cutting, where operators need to manually adjust valves repeatedly based on the plate thickness and piercing progress, and manually observe and judge whether the preheating is sufficient. It also eliminates the instability of piercing quality caused by differences in human experience. At the same time, the preset parameters can be directly called in the same batch of processing without having to be set repeatedly at each piercing point, which greatly reduces the degree of manual intervention and labor intensity, and improves piercing efficiency and consistency.

[0041] Please see Figure 2 After the step of using both the perforating flame and the perforating laser beam to perforate the workpiece, the following steps are also included: Step S5: Control the cutting head to spray cutting gas onto the workpiece according to the third gas opening signal, so that the perforation flame is switched to the cutting flame. According to the third light opening signal, the cutting head outputs a cutting laser beam onto the surface of the workpiece, and the cutting flame and the cutting laser beam cut the workpiece together.

[0042] In some embodiments, the third gas-on signal includes a third gas switch control signal and a third gas pressure control signal. The third gas switch control signal controls the output of the cutting gas, and the third gas pressure control signal controls the gas pressure of the cutting gas. This design, by dividing the gas-on signal into two dimensions—switch control and pressure control—enables independent management of the cutting gas output and adjustment of its pressure. Specifically, the third gas pressure control signal sets the cutting gas pressure to a higher value to meet the high-pressure gas requirements during the cutting stage. During cutting, a large amount of molten metal is continuously generated along the kerf, requiring higher gas pressure to provide sufficient gas momentum to completely blow away the slag from the depths of the kerf, resulting in a slag-free, narrow, and highly perpendicular cutting section.

[0043] The cutting gas pressure is higher than the piercing gas pressure. Since only a small amount of molten metal needs to be blown away at a fixed point during the piercing stage, a medium gas pressure is sufficient. However, during the cutting stage, slag needs to be continuously removed along the entire cutting path. As the kerf deepens, the slag flow resistance increases. Therefore, the cutting gas pressure is set higher than the piercing gas pressure. High-pressure gas is used to completely blow away the molten metal and oxides at the bottom of the kerf, preventing slag from solidifying at the edge of the kerf and forming slag, thus significantly improving the surface quality of the cut surface.

[0044] Furthermore, the cutting gas includes cutting fuel gas and cutting-assisted oxygen. This design, using a combination of cutting fuel gas and auxiliary oxygen as the cutting gas, allows for the simultaneous heating of the workpiece by the laser beam and the release of a large amount of chemical heat through a strong oxidation-combustion reaction between oxygen and metal. This heat assists the laser energy in melting the workpiece material, significantly increasing the cutting speed. Especially in thick plate cutting, the additional heat generated by the oxidation-combustion reaction compensates for the attenuation of laser energy along the thickness direction due to the deepening of the kerf, ensuring that the material at the bottom of the kerf is fully melted and discharged by high-pressure gas. Simultaneously, by adjusting the mixing ratio of fuel gas and oxygen, cutting parameters can be optimized for different materials, enhancing process adaptability.

[0045] In some embodiments, the third switching signal includes a third laser switch control signal and a third laser power control signal. The third laser switch control signal controls the output of the cutting laser beam, and the third switching signal controls the power of the cutting laser beam. This design decomposes the switching signal into switch control and power control, enabling precise control of the laser beam's start / stop and energy output according to cutting requirements. During the cutting phase, the laser power is set to a higher value than the perforation power via the third laser power control signal to meet the continuous high energy density requirements of continuous cutting—heat diffuses continuously around the kerf during cutting, requiring higher power to compensate for heat loss and ensure that the material is continuously and rapidly melted along the cutting path, achieving stable and efficient continuous cutting.

[0046] The laser power of the cutting laser beam is greater than that of the perforating laser beam. The perforating stage only requires instantaneous penetration of a localized point on the workpiece, which can be accomplished with a short, medium-power laser action. The cutting stage, however, requires continuous melting of a large amount of material along the cutting path, and heat conduction losses accumulate with increasing cutting time. Higher power is needed to maintain sufficient energy density to ensure cutting speed and cross-sectional quality. Therefore, setting the cutting laser power higher than the perforating laser power satisfies the continuous demand for high energy input during continuous cutting while avoiding excessive power during the perforating stage that could lead to overheating of the material at the hole opening, thus achieving a reasonable distribution of energy output across each process stage.

[0047] Please see Figure 3 After the steps of controlling the cutting head to spray cutting gas onto the workpiece according to the third gas-opening signal and outputting a cutting laser beam onto the workpiece surface according to the third light-opening signal, the following steps are also included: Step S6: After the cutting is completed, control the cutting head to stop outputting the cutting laser beam and cutting gas.

[0048] Example 2 Please see Figure 4The laser processing head cutting equipment provided in this application includes a control system, a fiber laser 20, a gas output module 30, and a cutting head. The control system is electrically connected to both the fiber laser 20 and the gas output module 30, which are connected to the cutting head. The control system is also used to control the lifting and lowering movement of the cutting head. After the cutting head is lowered to a preset ignition height, the control system sends a first gas-on signal to the gas output module 30 to control the gas output module 30 to output ignition gas to the cutting head; and sends a first light-on signal to the fiber laser 20. The laser 20 controls the fiber laser 20 to output an ignition laser beam to the cutting head, causing the cutting head to spray ignition gas onto the workpiece surface and output an ignition laser beam at the ignition height; the control system controls the cutting head to rise to a preset perforation height, and then sends a second gas-on signal to the gas output module 30 to control the gas output module 30 to output perforation gas to the cutting head; and sends a second light-on signal to the fiber laser 20 to control the fiber laser 20 to output a perforation laser beam to the cutting head, causing the cutting head to spray perforation gas onto the workpiece surface and output a perforation laser beam at the perforation height.

[0049] This solution controls the fiber laser 20, gas output module 30, and cutting head, and outputs light and gas with different parameters in the ignition and piercing stages respectively, realizing the automated connection between ignition and piercing in the flame cutting process. In the ignition stage, a low-pressure phosgene at a lower height is used to achieve stable ignition, while in the piercing stage, a high-pressure phosgene at a higher height is used to achieve rapid melting and penetration. This avoids the drawbacks of traditional flame cutting that relies on manual judgment of preheating time and repeated parameter adjustments, effectively shortening the piercing preheating time and improving piercing efficiency.

[0050] Combination Figure 4 and Figure 5 Furthermore, the control system includes a main controller 11 and a secondary controller 12. The main controller 11 controls the lifting and lowering movement of the cutting head. The secondary controller 12 is electrically connected to the fiber laser 20 and the gas output module 30, respectively. After the main controller 11 controls the cutting head to descend to the ignition height, it automatically sends a first gas-on signal to the gas output module 30 and a first light-on signal to the fiber laser 20 to execute the ignition action. The main controller 11 is also used to send a perforation start signal (e.g., after ignition is completed) after the perforation is completed. Figure 5 (As shown in X1) to the secondary controller 12; the secondary controller 12 sends a second gas-on signal to the gas output module 30 and a second light-on signal to the fiber laser 20 according to the perforation start signal. It is understood that in other embodiments, the same controller may be used for control, and this is not limited here.

[0051] The secondary controller 12 can be a composite dedicated controller, PLC, etc. In this embodiment, the secondary controller 12 is used as a composite dedicated controller for example.

[0052] This solution separates and decouples the axis motion control from the phosgene output control by dividing the control system into a main controller 11 and a secondary controller 12. The main controller 11 focuses on controlling the lifting and movement of the cutting head, while the secondary controller 12 focuses on the timing and parameter control of the phosgene and laser. The two controllers work together through signal interaction. The ignition action is automatically triggered by the secondary controller 12 after the cutting head reaches the ignition height, without external intervention. The piercing action is triggered by the main controller 11 sending a piercing start signal after the cutting head is raised to the piercing height, ensuring accurate timing of each stage of control action and reducing manual intervention.

[0053] Furthermore, the secondary controller 12 is also used to send a third gas-on signal to the gas output module 30 after the piercing is completed, so as to control the gas output module 30 to output cutting gas to the cutting head; and to send a third light-on signal to the fiber laser 20, so as to control the fiber laser 20 to output a cutting laser beam to the cutting head, and to send a piercing end signal (e.g. Figure 5 (As shown in X2) to the main controller 11; the main controller 11 is also used to control the cutting head to move along a preset cutting path after receiving the piercing end signal, so as to cut the pierced workpiece; after the cutting is completed, the main controller 11 sends a cutting end signal (as .... Figure 5 (As shown in X3) to the secondary controller 12; the secondary controller 12 stops sending the third air-opening signal and the third light-opening signal according to the cutting end signal.

[0054] This solution automatically switches to cutting parameters (third gas-on signal and third phosgene-on signal) after piercing by the secondary controller 12, and sends a piercing end signal to the main controller 11 after the switch is completed, achieving a seamless connection between piercing and cutting. The main controller 11 only controls the cutting head to move along the preset cutting path after receiving the piercing end signal, avoiding the risk of cutting failure or gun collision caused by the cutting head starting to move before the workpiece is melted through. After cutting, the main controller 11 sends a cutting end signal to the secondary controller 12, which stops the phosgene output accordingly, forming a complete closed-loop control of the entire process of "ignition → piercing → cutting → shutdown", further reducing the dependence on manual intervention and improving the automation level and operating efficiency of the flame cutting equipment.

[0055] In this solution, the cutting equipment includes a main controller 11 and a secondary controller 12, which work together to control the entire process of ignition, piercing, and cutting as follows: First, the main controller 11 controls the cutting head to descend to the preset ignition height. The secondary controller 12 sends a first gas-on signal to the gas output module 30 to control the gas output module 30 to output ignition gas to the cutting head. It also sends a first light-on signal to the fiber laser 20 to control the fiber laser 20 to output an ignition laser beam to the cutting head, so that the cutting head sprays ignition gas onto the workpiece surface and outputs an ignition laser beam at the ignition height, thus completing the ignition action.

[0056] After ignition, the main controller 11 controls the cutting head to rise to the preset piercing height, sends a piercing start signal to the secondary controller 12, and pauses to wait. The secondary controller 12 sends a second gas-on signal to the gas output module 30 based on the piercing start signal, controlling the gas output module 30 to output piercing gas to the cutting head; and sends a second light-on signal to the fiber laser 20, controlling the fiber laser 20 to output a piercing laser beam to the cutting head, so that the cutting head sprays piercing gas onto the workpiece surface at the piercing height and outputs a piercing laser beam, thus piercing the workpiece together.

[0057] After piercing is completed, the secondary controller 12 sends a third gas-on signal to the gas output module 30 to control the gas output module 30 to output cutting gas to the cutting head; and sends a third light-on signal to the fiber laser 20 to control the fiber laser 20 to output a cutting laser beam to the cutting head, and sends a piercing end signal to the main controller 11. After receiving the piercing end signal, the main controller 11 controls the cutting head to move along a preset cutting path to cut the pierced workpiece.

[0058] After the cutting is completed, the main controller 11 sends a cutting end signal to the secondary controller 12, and the secondary controller 12 stops sending the third air-opening signal and the third light-opening signal according to the cutting end signal.

[0059] In some embodiments, the secondary controller 12 sends various light-on signals to the fiber laser 20 through its output port to control the fiber laser 20 to output laser light and adjust the laser power; the secondary controller 12 sends various gas-on signals to the gas output module 30 through its output port to control the gas output module 30 to output gas and adjust the gas pressure.

[0060] Furthermore, the gas output module 30 includes a gas source 31 and a proportional valve 32. The proportional valve 32 is connected to the secondary controller 12 and the gas source 31 respectively, and is used to receive various gas opening signals sent by the secondary controller 12.

[0061] Among them, the control signals of each gas switch and each laser switch are digital signals, while the control signals of each gas pressure and each laser power are analog signals.

[0062] In some embodiments, the digital output port of the main controller 11 is connected to the digital input port of the secondary controller 12, for sending a piercing start signal and / or a cutting end signal to the secondary controller 12; the digital output port of the secondary controller 12 is connected to the digital input port of the main controller 11, for sending a piercing end signal to the main controller 11.

[0063] Example 3 Embodiment 3 of this application discloses a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the cutting control method of Embodiment 1.

[0064] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of this application, and all such substitutions or changes should fall within the protection scope of the appended claims.

Claims

1. A cutting control method, characterized in that, Includes the following steps: Control the cutting head to descend to the preset ignition height; According to the first gas-opening signal, the cutting head is controlled to spray ignition gas onto the workpiece, and according to the first light-opening signal, the cutting head is controlled to output an ignition laser beam onto the surface of the workpiece to generate a high-temperature spark on the surface of the workpiece. The high-temperature spark ignites the ignition gas to form an ignition flame. Control the cutting head to rise to the preset perforation height; According to the second gas-opening signal, the cutting head is controlled to spray perforating gas onto the workpiece, so that the ignition flame is switched to a perforating flame. According to the second light-opening signal, the cutting head is controlled to output a perforating laser beam onto the surface of the workpiece. The perforating flame and the perforating laser beam perforate the workpiece together.

2. The cutting control method according to claim 1, characterized in that, The preset ignition height L1 is 10mm~20mm, and the preset perforation height L2 is 30mm~120mm.

3. The cutting control method according to claim 1, characterized in that, The first gas opening signal includes a first gas switch control signal and a first gas pressure control signal. The first gas switch control signal controls the output of the ignition gas, and the first gas pressure control signal controls the gas pressure of the ignition gas. The first switching signal includes a first laser switch control signal and a first laser power control signal. The first laser switch control signal controls the output of the ignition laser beam, and the first laser control signal controls the power of the ignition laser beam.

4. The cutting control method according to claim 1, characterized in that, The second gas opening signal includes a second gas switch control signal and a second gas pressure control signal. The second gas switch control signal controls the output of the perforating gas, and the second gas pressure control signal controls the gas pressure of the perforating gas. The second switching signal includes a second laser switch control signal and a second laser power control signal. The second laser switch control signal controls the output of the perforated laser beam, and the second switching signal controls the power of the perforated laser beam.

5. The cutting control method according to claim 1, characterized in that, The pressure of the perforating gas is greater than the pressure of the ignition gas, and the laser power of the perforating laser beam is greater than the laser power of the ignition laser beam.

6. The cutting control method according to any one of claims 1 to 5, characterized in that, After the step of having the perforating flame and the perforating laser beam jointly perforate the workpiece, the following step is also included: According to the third gas-opening signal, the cutting head is controlled to spray cutting gas onto the workpiece, so that the perforating flame is switched to a cutting flame. According to the third light-opening signal, the cutting head outputs a cutting laser beam onto the surface of the workpiece, and the cutting flame and the cutting laser beam cut the workpiece together.

7. The cutting control method according to claim 6, characterized in that, After the steps of controlling the cutting head to spray cutting gas onto the workpiece according to the third gas-on signal and outputting a cutting laser beam onto the workpiece surface according to the third light-on signal, the following steps are also included: After the cutting is completed, the cutting head is controlled to stop outputting the cutting laser beam and the cutting gas.

8. A cutting device, characterized in that, include: The system comprises a control system, a fiber laser, a gas output module, and a cutting head. The control system is electrically connected to the fiber laser and the gas output module, respectively. The fiber laser and the gas output module are respectively connected to the cutting head. The control system is also used to control the lifting and lowering movement of the cutting head. After the control system controls the cutting head to descend to a preset ignition height, it sends a first gas-on signal to the gas output module to control the gas output module to output ignition gas to the cutting head; and sends a first light-on signal to the fiber laser to control the fiber laser to output an ignition laser beam to the cutting head, so that the cutting head sprays ignition gas onto the workpiece surface and outputs an ignition laser beam at the ignition height. After the control system controls the cutting head to rise to the preset perforation height, it sends a second gas opening signal to the gas output module to control the gas output module to output perforation gas to the cutting head; And send a second switching signal to the fiber laser to control the fiber laser to output a perforating laser beam to the cutting head, so that the cutting head sprays perforating gas onto the workpiece surface at the perforation height and outputs a perforating laser beam.

9. The cutting device according to claim 8, characterized in that, The control system includes a main controller and a secondary controller; The main controller is used to control the lifting and lowering movement of the cutting head; The secondary controller is electrically connected to the fiber laser and the gas output module respectively. After the main controller controls the cutting head to descend to the ignition height, it automatically sends the first gas-on signal to the gas output module and the first light-on signal to the fiber laser to perform the ignition action. The main controller is also used to send a perforation start signal to the sub-controller after ignition is completed; the sub-controller sends a second gas opening signal to the gas output module and a second light opening signal to the fiber laser according to the perforation start signal.

10. The cutting device according to claim 9, characterized in that, The secondary controller is also used to send a third gas-opening signal to the gas output module after the piercing is completed, so as to control the gas output module to output cutting gas to the cutting head; and to send a third light-opening signal to the fiber laser, so as to control the fiber laser to output a cutting laser beam to the cutting head; The main controller is also used to control the cutting head to move along a preset cutting path to cut the workpiece after receiving the piercing end signal output by the sub-controller.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the steps of the cutting control method according to any one of claims 1 to 7.

Images