Laser cutting method, device and equipment, storage medium and product

Abstract

The invention discloses a laser cutting method, device and equipment, a storage medium and a product. The laser cutting method comprises the steps that a machining path of a workpiece is obtained, and the machining path comprises a straight trimming cutting section and a groove edge cutting section; in the straight trimming cutting section, the laser cutting head is controlled to cut the workpiece at the normal cutting frequency, the normal laser pulse duty ratio, the normal cutting gas pressure and the normal cutting speed; in the groove edge cutting section, a laser cutting head is controlled to cut the workpiece according to the trimming pulse frequency, the trimming laser pulse duty ratio, the trimming gas pressure and the trimming cutting speed, and the normal cutting frequency is larger than the trimming pulse frequency; the normal laser pulse duty ratio is larger than the trimming laser pulse duty ratio, the normal cutting gas pressure is larger than the trimming gas pressure, and the normal cutting speed is larger than the trimming cutting speed. Different cutting parameters are adopted for the straight cut edge and the groove edge respectively, and hard slag hung on the groove edge is basically removed or treated to be in the state of being very easy to remove.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser processing, and particularly relates to a laser cutting method, device, equipment, storage medium and product. BACKGROUND

[0002] With the increasing demand for laser processing grooves, the groove machine has more and more types, thicknesses and quantities of grooves in the terminal cutting. However, the biggest pain point in the processing is the problem of slag hanging on the groove edge in oxygen cutting. Lightly, the slag edge is polished after cutting; heavily, the workpiece needs to be repeatedly knocked down and then polished, which is time-consuming and laborious. SUMMARY

[0003] Embodiments of the application provide a laser cutting method, device, equipment, storage medium and product, which can basically remove the hard slag hanging on the groove edge during cutting.

[0004] The laser cutting method provided by the application comprises:

[0005] Obtaining a processing path of a workpiece, the processing path comprising a straight edge cutting section and a groove edge cutting section;

[0006] In the straight edge cutting section, a laser cutting head is controlled to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure and a normal cutting speed;

[0007] In the groove edge cutting section, the laser cutting head is controlled to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure and an edge trimming cutting speed. The normal cutting frequency is greater than the edge trimming pulse frequency, the normal laser pulse duty cycle is greater than the edge trimming laser pulse duty cycle, the normal cutting gas pressure is greater than the edge trimming gas pressure, and the normal cutting speed is greater than the edge trimming cutting speed. Optionally, the control of the laser cutting head to cut the workpiece at the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure and the edge trimming cutting speed comprises:

[0008] According to a preset slag degree of the groove edge, the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure and the edge trimming cutting speed are adjusted.

[0009] Optionally, the preset slag degree comprises at least one of a preset length of the slag, a preset thickness of the slag and a preset weight of the slag.

[0010] Optionally, the adjustment of the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure and the edge trimming cutting speed according to the preset slag degree of the groove edge comprises:

[0011] obtaining a length of the bevel edge, the length of the bevel edge being a length of a projection of the bevel edge on a horizontal plane;

[0012] obtaining a preset length of the slag;

[0013] when the preset length of the slag is greater than half of the length of the bevel edge, adjusting the trimming pulse frequency to a first frequency preset value, adjusting the trimming laser pulse duty cycle to a first duty cycle preset value, adjusting the trimming gas pressure to a first gas pressure preset value, and adjusting the trimming cutting speed to a first trimming speed preset value;

[0014] when the preset length of the slag is less than or equal to half of the length of the bevel edge, adjusting the trimming pulse frequency to a second frequency preset value, adjusting the trimming laser pulse duty cycle to a second duty cycle preset value, adjusting the trimming gas pressure to a second gas pressure preset value, and adjusting the trimming cutting speed to a second trimming speed preset value;

[0015] wherein the first frequency preset value is less than the second frequency preset value, the first trimming speed preset value is less than the second trimming speed preset value, the first duty cycle preset value is greater than the second duty cycle preset value, and the first gas pressure preset value is greater than the second gas pressure preset value.

[0016] Optionally, the obtaining the length of the bevel edge comprises:

[0017] obtaining an angle of an included angle between a normal of the bevel edge cutting surface and the laser cutting head;

[0018] calculating a tangent value of the included angle;

[0019] obtaining a thickness of the workpiece;

[0020] obtaining the length of the bevel edge according to the tangent value of the included angle and the thickness of the workpiece.

[0021] Optionally, the obtaining the machining path of the workpiece comprises:

[0022] obtaining a point where a starting point of the bevel edge intersects with an end point of the straight edge or an end point of a bevel edge of a different angle, and marking the point as a first cutting point according to the machining path;

[0023] obtaining an end point of the bevel edge and marking the end point as a second cutting point;

[0024] the cutting the bevel edge cutting section, and controlling the laser cutting head to cut the workpiece at the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure, and the trimming cutting speed, comprises:

[0025] When cutting to the first cutting point, the workpiece is cut along the bevel edge cutting section based on the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure, and the trimming cutting speed until the second cutting point.

[0026] The embodiment of the present application further provides a cutting control device, comprising:

[0027] The acquisition module is configured to acquire a machining path of the workpiece, the machining path comprising a straight edge cutting section and a bevel edge cutting section.

[0028] The cutting module is configured to control the laser cutting head to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure, and a normal cutting speed in the straight edge cutting section; and control the laser cutting head to cut the workpiece at a trimming pulse frequency, a trimming laser pulse duty cycle, a trimming gas pressure, and a trimming cutting speed in the bevel edge cutting section, the normal cutting frequency being greater than the trimming pulse frequency, the normal laser pulse duty cycle being greater than the trimming laser pulse duty cycle, the normal cutting gas pressure being greater than the trimming gas pressure, and the normal cutting speed being greater than the trimming cutting speed.

[0029] The embodiment of the present application further provides a machining device, comprising a memory and a processor, the memory storing a computer program, and the processor implementing the laser cutting method of any of the above embodiments when executing the computer program.

[0030] The embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium storing a computer program, and the computer program implementing the laser cutting method of any of the above embodiments when executed by a processor.

[0031] The embodiment of the present application further provides a computer program product, comprising a computer program, and the computer program implementing the laser cutting method of any of the above embodiments when executed by a processor.

[0032] In the laser cutting method, device, equipment, storage medium and product provided by the embodiment of the present application, different cutting parameters are used for straight edges and bevel edges respectively, and the cutting trimming process is performed on the bevel edge, so that the hard slag on the bevel edge is basically removed or processed to a state that is easy to remove, thereby reducing the subsequent processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0034] Figure 1 A flowchart of the laser cutting method provided by the embodiments of the present application.

[0035] Figure 2 Another flowchart of the laser cutting method provided by the embodiments of the present application.

[0036] Figure 3 Still another flowchart of the laser cutting method provided by the embodiments of the present application.

[0037] Figure 4 Still another flowchart of the laser cutting method provided by the embodiments of the present application.

[0038] Figure 5 A cutting schematic diagram of the laser cutting method provided by the embodiments of the present application.

[0039] Figure 6 A module schematic diagram of the cutting control device provided by the embodiments of the present application.

[0040] Figure 7 A module schematic diagram of the processing equipment provided by the embodiments of the present application.

[0041] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positions based on the directions or positions shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] It should be understood that the term "and / or" used in the specification and the appended claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0046] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0047] It should be noted that the information interaction, execution process and the like between the above-mentioned devices / units, since the same concept as the method embodiments of the present application, the specific functions and the technical effects brought by it, specific can refer to the method embodiment part, here will not be repeated.

[0048] Please refer to Figure 1 The laser cutting method provided in the present application comprises:

[0049] S10: Obtain the machining path of the workpiece, the machining path comprising a straight-cut edge cutting section and a bevel edge cutting section.

[0050] S20: In the straight-cut edge cutting section, control the laser cutting head to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure and a normal cutting speed.

[0051] S30: In the bevel edge cutting section, control the laser cutting head to cut the workpiece at an edging pulse frequency, an edging laser pulse duty cycle, an edging gas pressure and an edging cutting speed, the normal cutting frequency being greater than the edging pulse frequency, the normal laser pulse duty cycle being greater than the edging laser pulse duty cycle, the normal cutting gas pressure being greater than the edging gas pressure, and the normal cutting speed being greater than the edging cutting speed.

[0052] According to the design drawing of the workpiece, the shape size, groove type, groove angle, and distribution of straight cut edge and groove edge of the workpiece are determined. The design drawing can be analyzed and processed by numerical control programming software to generate the motion trajectory of the laser cutting head, that is, the machining path. The straight cut edge cutting section and the groove edge cutting section are accurately distinguished from the machining path and are marked.

[0053] The straight cut edge refers to the cutting of the laser cutting head perpendicular to the surface of the workpiece, and the cut is a 90° right angle. The groove edge refers to the laser cutting head cutting the workpiece at a certain angle to form a beveled edge. The groove cutting can include 30°, 45° or 60° angle groove cutting and V-shaped, Y-shaped, X-shaped, K-shaped groove cutting, etc.

[0054] In the straight cut edge cutting section, the normal cutting frequency, the normal laser pulse duty cycle, the normal cutting gas pressure, and the normal cutting speed are mainly determined according to the material and thickness of the workpiece and the cutting requirements of the straight cut edge. Reasonable setting of each parameter can ensure the cutting efficiency and cutting quality of the straight cut edge, such as perpendicularity and surface roughness, etc. Since the cutting direction of the laser cutting head is perpendicular to the surface of the workpiece, the molten slag generated during the cutting process can be smoothly discharged under the action of gravity and cutting gas flow.

[0055] In the related art, the groove cutting calls the same process parameters as the straight cut cutting to cut the entire cutting contour of the workpiece, so that the groove edge and the straight cut edge use the same cutting speed and the same cutting gas pressure, etc. Since the cut of the groove edge is an inclined bevel, the inclined cut channel makes the gas flow path longer, and the pressure and flow rate of the gas decay along the groove edge cutting section, resulting in a weakened gas thrust on the molten slag, which is prone to remain and solidify to adhere to the groove edge.

[0056] The molten slag is especially prone to occur at the intersection of the straight edge and the groove, or at the corner connection of grooves with different angles. The molten slag generated by the groove cutting forms an inclined molten pool, which not only contacts the groove edge below, but also contacts the straight cut edge, other groove bevels, etc. The heat of the molten slag quickly loses through multiple interfaces, resulting in a faster cooling speed of the molten pool and a decrease in fluidity, and finally remaining and solidifying into slag.

[0057] In the laser cutting method provided in the embodiments of the present application, the normal cutting frequency refers to the repetition frequency of the laser pulse when cutting straight, which is greater than the trimming pulse frequency. This is because the core of straight cut edge cutting is to quickly penetrate the workpiece, which requires high-frequency pulse to provide intensive energy input to ensure cutting efficiency, and high-frequency energy to quickly melt the metal and form a cut. The normal cutting frequency can be 5000 Hz. When trimming the groove, a lower trimming pulse frequency can reduce energy fluctuations and avoid excessive ablation of the groove surface, which is more suitable for uniform treatment of the slag.

[0058] The normal laser pulse duty cycle refers to the ratio of the pulse on time to the period during straight cutting, which is also greater than the trimming laser pulse duty cycle. During straight cutting, a higher duty cycle can enhance the energy output of a single pulse, ensuring that the thick plate material can be fully melted at high speed. The normal laser pulse duty cycle can be 100% to ensure continuous cutting. When trimming, a lower duty cycle can avoid oxidation or deformation of the groove face caused by excess energy, especially when dealing with thin slag layers, and a moderate reduction in the duty cycle can reduce spatter.

[0059] The normal cutting gas pressure is greater than the trimming gas pressure, which is adapted to the difference in slag discharge requirements between straight cutting and trimming. During straight cutting, high gas pressure can quickly discharge molten metal from the vertical cut, preventing molten slag from accumulating in the cut and affecting cutting accuracy. The normal cutting gas pressure can be 0.5-1 bar, which can effectively suppress molten slag adhesion. When trimming the groove, lower gas pressure can more gently discharge the hanging slag, avoiding high gas pressure blowing the insufficiently melted slag to the groove face to cause secondary adhesion.

[0060] The normal cutting speed is the moving speed of the cutting head during straight cutting. The straight cutting edge has no inclination angle, and the metal melting and discharge are smoother, so a higher speed can be used to improve efficiency while ensuring cut quality and reducing processing time. When trimming the groove, a slower speed can prolong the action time of the laser in the hanging slag area, ensuring that the slag layer is fully melted and discharged, especially when dealing with long-range or thick-layer hanging slag, low speed is the key to ensuring trimming effect. The trimming cutting speed divided by the normal cutting speed equals the speed ratio, which is greater than 0 and less than 1.

[0061] Therefore, in the laser cutting method provided in the present application, when cutting the groove edge, the trimming pulse frequency, trimming laser pulse duty cycle, trimming gas pressure, and trimming cutting speed are called to cut. The trimming pulse frequency, trimming laser pulse duty cycle, trimming gas pressure, and trimming cutting speed are more suitable for the groove edge, for example, the gas pressure can be increased to make it easier to discharge molten slag. The call of trimming pulse frequency, trimming laser pulse duty cycle, trimming gas pressure, and trimming cutting speed can make the laser cutting head cut the groove edge while trimming. The molten slag attached to the groove edge after the workpiece is cut is greatly reduced, reducing the cost of subsequent processing.

[0062] The machining path of the workpiece is divided into a straight edge cutting section and a bevel edge cutting section. If the machining section is a straight edge cutting section, the laser cutting head cuts the straight edge cutting section of the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure and a normal cutting speed, and a higher cutting frequency, a higher laser pulse duty cycle, a lower cutting gas pressure and a higher cutting speed can be used. If the machining section is a bevel edge cutting section, the laser cutting head cuts the bevel edge cutting section of the workpiece at a lower cutting frequency, a lower laser pulse duty cycle, a higher cutting gas pressure and a lower cutting speed, so that the slag attached to the bevel edge of the workpiece after cutting is greatly reduced.

[0063] Please refer to Figure 2 Optionally, step S30: controlling the laser cutting head to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure and an edge trimming cutting speed, comprising:

[0064] S31: adjusting the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure and the edge trimming cutting speed according to the preset slag degree of the bevel edge.

[0065] The edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure and the edge trimming cutting speed and other parameters jointly act on the bevel edge cutting process, and directly affect the formation and removal effect of the slag of the bevel edge. Among them, the higher the edge trimming pulse frequency, the more intensive the energy input per unit area, which can effectively break the slag. The larger the edge trimming laser pulse duty cycle, the stronger the energy released by a single pulse, which can be used to melt a thicker slag layer. The higher the edge trimming gas pressure, the stronger the airflow blowing force on the slag, which can reduce the residue of the slag on the bevel surface. The lower the edge trimming cutting speed, the longer the laser beam acts on the bevel surface, and the more sufficient the slag treatment.

[0066] According to the preset slag degree of the bevel edge, the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure and the edge trimming cutting speed and other bevel edge trimming cutting parameters are dynamically adjusted to realize targeted slag treatment. The determination of the preset slag degree can be determined in combination with the known workpiece material type, plate thickness and bevel angle before cutting, and can be divided into mild and severe. The mild slag can be polished to eliminate the slag after the workpiece is cut, and the severe slag needs to be repeatedly knocked down and then polished.

[0067] The smaller the inclination of the bevel, the thinner the thickness of the workpiece plate, and the slag is easy to discharge, which can be regarded as mild slag; the larger the inclination of the bevel, the thicker the thickness of the workpiece plate, and the slag is difficult to discharge, which can be regarded as severe slag. The slag degree of workpieces of different materials is also different when cutting the bevel.

[0068] The step S31 adjusts the bevel edge trimming cutting parameters to ensure that the energy input, the residue removal strength and the residue hanging degree are matched. For example, low pressure and high speed cutting parameters are used for light residue hanging to remove the thin residue without excessive melting of the base material; high frequency and high pressure cutting parameters are used for heavy residue hanging to concentrate and crush the hard residue and remove the residue with high strength.

[0069] The step S31 enables the laser cutting method provided by the present application to adapt to diversified processing requirements. No matter whether the workpiece is made of stainless steel, carbon steel or other materials, or whether the plate has different thicknesses or the bevel has different angles such as 30°, 45° or 60°, a corresponding processing scheme can be found by dynamically adjusting the bevel edge trimming cutting parameters, and it is not necessary to develop a process for each working condition, thereby reducing the complexity of process switching.

[0070] Optionally, the preset residue hanging degree includes at least one of a preset length of the residue hanging, a preset thickness of the residue hanging and a preset weight of the residue hanging.

[0071] The preset length of the residue hanging refers to the linear length of the predicted residue hanging along the bevel edge cutting path, which is usually related to the horizontal projection length of the bevel face. The preset length of the residue hanging determines the action range of the trimming process. If the preset length is long, the trimming cutting speed can be prolonged during the adjustment of the bevel edge trimming cutting parameters to ensure that all the residue hanging can be processed.

[0072] The preset thickness of the residue hanging is the value of the predicted residue layer height perpendicular to the bevel face, and the thickness can reflect the severity of the residue hanging. For the residue hanging with small thickness, the trimming pulse frequency and the duty cycle can be kept at a medium level, and the residue can be removed by medium energy; for the residue hanging with large thickness, the duty cycle needs to be increased to increase the single pulse energy to avoid residue layer residue.

[0073] The preset weight of the residue hanging refers to the mass of the residue hanging per unit length, and the weight can reflect the density and adhesion of the residue hanging. For the residue hanging with high preset weight, the bevel edge trimming cutting parameters can focus on the energy input and the residue removal strength, and the cutting speed can be reduced to prolong the laser action time to ensure that the heavy residue can be fully melted and removed.

[0074] It can be understood that the quantification of the preset residue hanging degree can be flexibly selected. The adjustment of the bevel edge trimming cutting parameters such as the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure and the trimming cutting speed can be based on the preset length, the preset thickness or the preset weight of the residue hanging alone, or the three dimensions can be comprehensively judged to ensure that the bevel edge trimming cutting parameters can be accurately matched with the actual residue hanging risk.

[0075] Please refer to Figure 3Optionally, step S31 adjusts the trimming pulse frequency, trimming laser pulse duty cycle, trimming gas pressure and trimming cutting speed according to the preset slag length of the groove edge, comprising:

[0076] S311: Obtain the length of the groove edge, which is the length of the projection of the groove edge on the horizontal plane.

[0077] S312: Obtain the preset length of the slag.

[0078] S313: When the preset length of the slag is greater than half the length of the groove edge, adjust the trimming pulse frequency to a first frequency preset value, the trimming laser pulse duty cycle to a first duty cycle preset value, the trimming gas pressure to a first gas pressure preset value, and the trimming cutting speed to a first trimming speed preset value.

[0079] S314: When the preset length of the slag is less than or equal to half the length of the groove edge, adjust the trimming pulse frequency to a second frequency preset value, the trimming laser pulse duty cycle to a second duty cycle preset value, the trimming gas pressure to a second gas pressure preset value, and the trimming cutting speed to a second trimming speed preset value.

[0080] Wherein, the first frequency preset value is less than the second frequency preset value, the first trimming speed preset value is less than the second trimming speed preset value, the first duty cycle preset value is greater than the second duty cycle preset value, and the first gas pressure preset value is greater than the second gas pressure preset value.

[0081] In step S311, the length of the groove edge can be obtained by a preset detection module or the parameters of the groove edge cutting section in the machining path, specifically the projection length of the groove edge along the extension direction of the workpiece surface on the horizontal plane.

[0082] In step S312, the preset length of the slag can be preset based on the workpiece material, thickness, groove angle and previous cutting process data.

[0083] In step S313, when the preset length of the slag is greater than half the length of the groove edge, it means that the slag is distributed over a wide range along the groove edge, and more covering groove edge trimming cutting parameters are needed. Specifically, the trimming pulse frequency is adjusted to a first frequency preset value, the low frequency can reduce the high frequency fluctuation of energy, ensuring that the energy output along the long range is more uniform; the trimming laser pulse duty cycle is set to a first duty cycle preset value, the high duty cycle can prolong the energy action time of a single pulse, avoiding the residual slag caused by insufficient local energy in a long range; the trimming gas pressure is adjusted to a first gas pressure preset value, a higher gas pressure can enhance the slag discharge capacity along the length direction, preventing long-range slag accumulation; the trimming cutting speed is set to a first trimming speed preset value, the low speed meets the processing requirements of long-range slag, ensuring that the laser emitted by the cutting laser head can fully act on each slag area.

[0084] For example, the horizontal projection length of the groove edge is 12 mm, and the preset length of the slag is 7 mm. The groove edge trimming cutting parameters of a frequency of 300 Hz, a duty cycle of 90%, an oxygen gas pressure of 2.5 bar, and a speed of 50% of the normal cutting speed are used to continue cutting the groove edge, and the long slag area is covered by uniform energy and continuous slag discharge.

[0085] When the preset length of the slag is less than or equal to half of the length of the groove edge, the slag is locally concentrated, and the groove edge trimming cutting parameters capable of emitting local energy can be used. Specifically, the trimming pulse frequency is adjusted to a second frequency preset value, the high-frequency pulse can output energy in a short range, and the local slag is quickly melted; the trimming laser pulse duty cycle is set to a second duty cycle preset value, and the lower duty cycle can avoid local energy being too high to cause the workpiece to be overburned; the trimming gas pressure is adjusted to a second gas pressure preset value, and the lower gas pressure reduces the excessive blowing loss of the local area of the groove edge; and the trimming cutting speed is set to a second trimming speed preset value, and the higher speed shortens the laser action time of the non-slag area and improves the overall efficiency.

[0086] For example, the horizontal projection length of the groove edge is 12 mm, and the preset length of the slag is 4 mm. The groove edge trimming cutting parameters of a frequency of 2000 Hz, a duty cycle of 80%, a gas pressure of 1.5 bar, and a speed of 80% of the normal cutting speed are used to continue cutting the groove edge, and the local slag is processed by high-frequency energy concentration, while the influence on the remaining 8 mm of the non-slag area is reduced.

[0087] In some embodiments, the preset weight and the preset thickness of the slag can also be used as the basis for adjusting the groove edge trimming cutting parameters. The specific logic is consistent with the adjustment idea of the preset length of the slag, that is, the processing needs of the slag layer are determined by the threshold value, and the corresponding parameter combination is matched.

[0088] Specifically, when the preset weight of the slag is greater than the first weight threshold value, the trimming pulse frequency is adjusted to a first frequency preset value, the trimming laser pulse duty cycle is adjusted to a first duty cycle preset value, the trimming gas pressure is adjusted to a first gas pressure preset value, and the trimming cutting speed is adjusted to a first trimming speed preset value.

[0089] When the preset weight of the slag is greater than the second weight threshold value and less than the first weight threshold value, the trimming pulse frequency is adjusted to a second frequency preset value, the trimming laser pulse duty cycle is adjusted to a second duty cycle preset value, the trimming gas pressure is adjusted to a second gas pressure preset value, and the trimming cutting speed is adjusted to a second trimming speed preset value.

[0090] In some embodiments, when the preset thickness of the slag is greater than the thickness first threshold value, the trimming pulse frequency is adjusted to the first frequency preset value, the trimming laser pulse duty cycle is adjusted to the first duty cycle preset value, the trimming gas pressure is adjusted to the first gas pressure preset value, and the trimming cutting speed is adjusted to the first trimming speed preset value.

[0091] When the preset thickness of the slag is greater than the thickness second threshold value and less than the thickness first threshold value, the trimming pulse frequency is adjusted to the second frequency preset value, the trimming laser pulse duty cycle is adjusted to the second duty cycle preset value, the trimming gas pressure is adjusted to the second gas pressure preset value, and the trimming cutting speed is adjusted to the second trimming speed preset value.

[0092] The weight first threshold value, the weight second threshold value, the thickness first threshold value, and the thickness second threshold value can be adjusted according to the material properties of the workpiece, such as the material and thickness of the workpiece.

[0093] Long-range distributed slag, heavy slag, or thick-layered slag can be trimmed with uniform energy coverage, strong slag discharge, and sufficient action time, so it can match the groove edge trimming cutting parameter combination of low frequency, high duty cycle, high gas pressure, and low speed. Short-range slag, light slag, or thin-layered slag, on the other hand, requires concentrated energy and rapid processing, so it is suitable for the groove edge trimming cutting parameter combination of high frequency, low duty cycle, low gas pressure, and high speed. Through the flexible combination of weight, thickness, and length dimensions, the characteristics of the slag can be more comprehensively predicted, ensuring the accuracy of the adjustment of the groove edge trimming cutting parameters.

[0094] Please refer to Figure 4 Optionally, the step S311 obtains the length of the groove edge 11, comprising:

[0095] S3111: Obtain the angle of the included angle between the normal of the cutting surface of the groove edge 11 and the laser cutting head.

[0096] In step S3111, the included angle between the normal of the cutting surface of the groove edge 11 and the laser cutting head refers to the angle formed between the normal direction of the bevel and the direction of the laser beam emission. This angle can be directly read by the numerical control system of the processing equipment, as the inclination angle of the laser cutting head needs to be preset before groove cutting, the system will automatically record the value of the included angle.

[0097] S3112: Calculate the tangent value of the included angle.

[0098] S3113: Obtain the thickness of the workpiece 10. The thickness of the workpiece 10 can be obtained by a preset detection module or the processing drawing parameters of the workpiece 10.

[0099] S3114: Obtain the length of the groove edge 11 according to the tangent value of the included angle and the thickness of the workpiece 10.

[0100] Please refer toFigure 5 , Figure 5 The laser cutting method provided by the embodiment of the present application provides a cutting schematic diagram of a workpiece. According to geometric relations, the length of the bevel edge 11 can be calculated by the formula L = tanθ x H. Wherein, H is the thickness of the workpiece 10, θ is the included angle between the normal of the cutting surface of the bevel edge 11 and the laser cutting head, which can also be understood as the bevel angle of processing, and L is the length of the bevel edge 11.

[0101] By geometric calculation, the projection length of the bevel edge 11 of the workpiece 10 with different bevel angles and different thicknesses can be accurately obtained, which provides a basis for the comparison between the preset length of the slag hanging and the length of the bevel edge 11, and ensures the accuracy of the parameter adjustment of the bevel edge cutting.

[0102] Optionally, the step S10 obtains the processing path of the workpiece, including:

[0103] S11: According to the processing path, a point where the starting point of the bevel edge and the ending point of the straight cutting edge or the ending point of the bevel edge with different angles intersect is obtained, and is marked as a first cutting point.

[0104] The first cutting point is the intersection node of the bevel edge and other cutting sections in the processing path, which specifically includes two cases: when the bevel edge and the straight cutting edge are connected, the first cutting point is the intersection point of the starting point of the bevel edge and the ending point of the straight cutting edge. When the bevel edges with different angles intersect, the first cutting point is the intersection point of the starting point of one bevel edge and the ending point of the other bevel edge.

[0105] For example, in the V-shaped structure in which the processing path includes a straight cutting edge and a 45° bevel edge, after the straight cutting edge is cut along the vertical direction to the ending point of the straight cutting edge, the bevel edge extends from the ending point at a 45° inclination angle, and at this time, the starting point of the bevel edge is the first cutting point.

[0106] The first cutting point can be automatically identified and marked by the CAM system when the path is planned, so as to ensure that the first cutting head can accurately trigger the switching of the bevel edge trimming cutting parameters.

[0107] S12: The ending point of the bevel edge is obtained and is marked as a second cutting point.

[0108] The second cutting point is the ending point of the bevel edge cutting section, that is, the position where the bevel edge extends along the preset cutting trajectory to the end, which is also marked by the CAM system according to the design size of the workpiece. For example, the 45° bevel edge needs to be cut along the inclined trajectory for 150 mm, and then the position after moving 150 mm along the trajectory from the first cutting point is the second cutting point. The line formed by the second cutting point and the first cutting point constitutes the bevel edge cutting section.

[0109] The step S30 cuts the workpiece along the groove edge cutting section at the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure, and the trimming cutting speed, including:

[0110] S32: When cutting to the first cutting point, the workpiece is cut along the groove edge cutting section based on the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure, and the trimming cutting speed until the second cutting point.

[0111] In step S32, when the laser cutting head moves to the first cutting point along the machining path, the system automatically triggers the parameter switching instruction to switch from the normal cutting frequency, the normal laser pulse duty cycle, the normal cutting gas pressure, and the normal cutting speed of the straight edge cutting section to the groove edge trimming cutting parameters of the groove edge cutting section, and continues to cut along the preset groove edge trajectory until the cutting head reaches the second cutting point. After reaching the second cutting point, the cutting parameter switching is triggered again, and if it is a straight edge cutting section, the straight edge cutting parameters are restored, and if it is another angle groove edge, the corresponding groove edge cutting parameters are switched.

[0112] In related technologies, the intersection position of the groove edge and the straight edge, and the intersection position between two groove edges of different angles are usually the high incidence position of slag. Therefore, in the laser cutting method of the present application, special attention is paid to these intersection positions when cutting the groove edge. When the laser cutting head cuts to the first cutting point, the laser cutting head is controlled to cut the workpiece with the groove edge trimming cutting parameters until it cuts to the second cutting point.

[0113] Exemplarily, the machining path of a workpiece includes a first straight edge cutting section, a groove edge cutting section, and a second straight edge cutting section connected in sequence. When cutting, the laser cutting head cuts the workpiece along the first straight edge cutting section with normal cutting frequency, normal laser pulse duty cycle, normal cutting gas pressure, and normal cutting speed, etc. When the laser cutting head cuts to the first cutting point of the groove edge cutting section, it switches to the groove edge trimming cutting parameters of the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure, and the trimming cutting speed, etc. to cut along the groove edge cutting section until the second cutting point, and then the laser cutting head switches to the straight edge cutting parameters to cut along the second straight edge cutting section, completing the cutting work of the workpiece.

[0114] The groove edge cutting section uses different cutting parameters from the first straight edge cutting section and the second straight edge cutting section, so that the intersection position of the groove edge of the workpiece with the first straight edge and the second straight edge, and the degree of slag accumulation of the entire groove edge are greatly reduced.

[0115] Please refer to Figure 6 , Figure 6A module schematic diagram of the cutting control device provided by the embodiment of the present application is shown in the figure. The cutting control device provided by the embodiment of the present application comprises an acquisition module 21 and a cutting module 22. The acquisition module 21 is configured to acquire a machining path of a workpiece, and the machining path comprises a straight-cut edge cutting segment and a bevel edge cutting segment.

[0116] The cutting module 22 is configured to control the laser cutting head to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure and a normal cutting speed in the straight-cut edge cutting segment; and control the laser cutting head to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure and an edge trimming cutting speed in the bevel edge cutting segment. The normal cutting frequency is greater than the edge trimming pulse frequency, the normal laser pulse duty cycle is greater than the edge trimming laser pulse duty cycle, the normal cutting gas pressure is greater than the edge trimming gas pressure, and the normal cutting speed is greater than the edge trimming cutting speed.

[0117] Please refer to Figure 7 , Figure 7 A module schematic diagram of the machining equipment 30 provided by the embodiment of the present application is shown in the figure. The machining equipment 30 provided by the embodiment of the present application comprises a processor 31 and a memory 32. The memory 32 stores a computer program 33, and the processor 31 executes the computer program 33 to implement the laser cutting method described in any of the above embodiments.

[0118] For example, when the computer program 33 is executed by the processor 31, the following steps of the laser cutting method are implemented:

[0119] S10: Acquire a machining path of a workpiece, and the machining path comprises a straight-cut edge cutting segment and a bevel edge cutting segment.

[0120] S20: Control the laser cutting head to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure and a normal cutting speed in the straight-cut edge cutting segment.

[0121] S30: Control the laser cutting head to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure and an edge trimming cutting speed in the bevel edge cutting segment. The normal cutting frequency is greater than the edge trimming pulse frequency, the normal laser pulse duty cycle is greater than the edge trimming laser pulse duty cycle, the normal cutting gas pressure is greater than the edge trimming gas pressure, and the normal cutting speed is greater than the edge trimming cutting speed.

[0122] The machining equipment 30 can include but is not limited to the processor 31 and the memory 32. Those skilled in the art can understand that Figure 7 The machining equipment is only an example and does not constitute a limitation on the machining equipment, and can include more or fewer components than shown, or combine certain components, or different components, for example, can also include input / output devices, network access devices, buses, etc.

[0123] The processor 31 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0124] The memory 32 can be an internal storage unit of the processing device 30, such as a hard disk or a memory of the processing device in some embodiments. The memory 32 can also be an external storage device of the processing device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the processing device in other embodiments. Further, the memory 32 can include both the internal storage unit and the external storage device of the processing device. The memory 32 is used to store an operating system, an application program, a boot loader, data, and other programs, such as program codes of computer programs, etc. The memory 32 can also be used to temporarily store data that has been output or will be output.

[0125] For example, the computer program 33 can be divided into one or more modules / units, which are stored in the memory 32 and executed by the processor 31 to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program 33 in the processing device 30.

[0126] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0127] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or software function unit. In addition, the specific name of each functional unit and module is only for easy distinction, and does not limit the protection scope of the application. The specific working process of the unit and module in the system can refer to the corresponding process in the foregoing method embodiment, which will not be described here.

[0128] The foregoing integrated unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the processes in the foregoing embodiment methods can be instructed by a computer program to relevant hardware for completion, and the computer program can be stored in a computer-readable storage medium. When the processor executes the computer program, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer-readable medium includes any entity or device capable of carrying the computer program code to the device / terminal equipment, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable medium cannot be an electrical carrier signal and a telecommunication signal.

[0129] The embodiment of the application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the laser cutting method described in any of the foregoing embodiments is implemented.

[0130] For example, when the program is executed by the processor, the following steps of the laser cutting method are implemented:

[0131] S10: Obtain a machining path of a workpiece, the machining path including a straight-cut edge cutting segment and a bevel edge cutting segment.

[0132] S20: In the straight edge cutting section, the laser cutting head is controlled to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure, and a normal cutting speed.

[0133] S30: In the bevel edge cutting section, the laser cutting head is controlled to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure, and an edge trimming cutting speed, the normal cutting frequency is greater than the edge trimming pulse frequency, the normal laser pulse duty cycle is greater than the edge trimming laser pulse duty cycle, the normal cutting gas pressure is greater than the edge trimming gas pressure, and the normal cutting speed is greater than the edge trimming cutting speed.

[0134] Embodiments of the present application provide a computer program product, when the computer program product runs on a terminal device, the terminal device can implement the steps of the laser cutting method described in any of the above embodiments.

[0135] For example, when the computer program product runs on the terminal device, the terminal device can implement the steps of the following laser cutting method:

[0136] S10: Obtain a machining path of a workpiece, the machining path including a straight edge cutting section and a bevel edge cutting section.

[0137] S20: In the straight edge cutting section, the laser cutting head is controlled to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure, and a normal cutting speed.

[0138] S30: In the bevel edge cutting section, the laser cutting head is controlled to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure, and an edge trimming cutting speed, the normal cutting frequency is greater than the edge trimming pulse frequency, the normal laser pulse duty cycle is greater than the edge trimming laser pulse duty cycle, the normal cutting gas pressure is greater than the edge trimming gas pressure, and the normal cutting speed is greater than the edge trimming cutting speed.

[0139] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0140] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0141] In the embodiments provided by the present application, it should be understood that the disclosed apparatuses / devices and methods can be implemented in other manners. For example, the embodiments of the apparatus / device described above are merely illustrative. For example, the division of the modules or units is merely logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0142] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0143] The above-described embodiments are merely used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent replacements; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A laser cutting method, characterized by, The method comprises the following steps: acquiring a machining path of a workpiece, the machining path comprising a straight-cut edge cutting section and a bevel edge cutting section; in the straight-cut edge cutting section, controlling a laser cutting head to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure, and a normal cutting speed; in the bevel edge cutting section, controlling the laser cutting head to cut the workpiece at an edge trimming pulse frequency, an edge trimming laser pulse duty cycle, an edge trimming gas pressure, and an edge trimming cutting speed, the normal cutting frequency being greater than the edge trimming pulse frequency, the normal laser pulse duty cycle being greater than the edge trimming laser pulse duty cycle, the normal cutting gas pressure being greater than the edge trimming gas pressure, and the normal cutting speed being greater than the edge trimming cutting speed.

2. The laser cutting method according to claim 1, characterized in that, The control of the laser cutting head to cut the workpiece at the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure, and the edge trimming cutting speed comprises: adjusting the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure, and the edge trimming cutting speed according to a preset slag length of the bevel edge.

3. The laser cutting method according to claim 2, characterized in that, The preset slag length comprises at least one of a preset length of slag, a preset thickness of slag, and a preset weight of slag.

4. The laser cutting method according to claim 3, characterized in that, The adjusting of the edge trimming pulse frequency, the edge trimming laser pulse duty cycle, the edge trimming gas pressure, and the edge trimming cutting speed according to the preset slag length of the bevel edge comprises: acquiring a length of the bevel edge, the length of the bevel edge being a length of a projection of the bevel edge on a horizontal plane; acquiring the preset length of slag; when the preset length of slag is greater than half of the length of the bevel edge, adjusting the edge trimming pulse frequency to a first frequency preset value, the edge trimming laser pulse duty cycle to a first duty cycle preset value, the edge trimming gas pressure to a first pressure preset value, and the edge trimming cutting speed to a first edge trimming speed preset value; when the preset length of slag is less than or equal to half of the length of the bevel edge, adjusting the edge trimming pulse frequency to a second frequency preset value, the edge trimming laser pulse duty cycle to a second duty cycle preset value, the edge trimming gas pressure to a second pressure preset value, and the edge trimming cutting speed to a second edge trimming speed preset value; wherein the first frequency preset value is less than the second frequency preset value, the first edge trimming speed preset value is less than the second edge trimming speed preset value, the first duty cycle preset value is greater than the second duty cycle preset value, and the first pressure preset value is greater than the second pressure preset value.

5. The laser cutting method of claim 3, wherein, The acquiring of the length of the bevel edge comprises: acquiring an angle of an included angle between a normal of a cutting surface of the bevel edge and the laser cutting head; calculating a tangent value of the included angle; acquiring a thickness of the workpiece; obtaining the length of the bevel edge according to the tangent value of the included angle and the thickness of the workpiece.

6. The laser cutting method according to any one of claims 1 to 4, characterized in that, The acquiring of the machining path of the workpiece comprises: acquiring a point where a starting point of the bevel edge intersects with an end point of the straight-cut edge or an end point of a bevel edge with a different angle, and marking the point as a first cutting point according to the machining path; An end point of the bevel edge is obtained, and is marked as a second cutting point; The cutting of the bevel edge section includes: When cutting to the first cutting point, the workpiece is cut along the bevel edge section based on the trimming pulse frequency, the trimming laser pulse duty cycle, the trimming gas pressure, and the trimming cutting speed, until the second cutting point.

7. A cutting control device characterized by comprising: The method comprises: An acquisition module is configured to acquire a machining path of a workpiece, the machining path comprising a straight edge cutting section and a bevel edge cutting section; A cutting module is configured to control a laser cutting head to cut the workpiece at a normal cutting frequency, a normal laser pulse duty cycle, a normal cutting gas pressure, and a normal cutting speed in the straight edge cutting section. The normal cutting frequency is greater than the trimming pulse frequency, the normal laser pulse duty cycle is greater than the trimming laser pulse duty cycle, the normal cutting gas pressure is greater than the trimming gas pressure, and the normal cutting speed is greater than the trimming cutting speed.

8. A processing apparatus characterized by comprising: The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the laser cutting method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the laser cutting method according to any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to realize the laser cutting method according to any one of claims 1 to 6.

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