A three-axis laser cutting method for bevel chamfering

Abstract

A three-axis laser cutting method for bevel chamfering includes the following steps: placing a workpiece to be processed; preparing a bevel chamfering processing file; sending the bevel chamfering processing file to a planar three-axis laser cutting machine; setting the laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine perpendicular to the plane of the workpiece to be processed; adjusting the distance between the cutting nozzle and the edge of the cutting position of the workpiece to be processed and the distance between the cutting nozzle and the surface of the workpiece to be processed; adjusting the air pressure of the cutting nozzle of the laser cutting machine; adjusting the speed of the cutting nozzle of the laser cutting machine, and the laser cutting head and the cutting nozzle always maintain a vertical state with the workpiece to be processed. The three-axis laser cutting method for bevel chamfering of the present invention does not need to adjust the angle of the cutting cutting head, but only needs to maintain the angle between the laser cutting head and the workpiece to be processed during cutting, and can realize ablation of workpieces with various shapes and different positions, reducing the processing difficulty, and has high processing accuracy, centralized processes, stable ablation, and can significantly improve the processing efficiency of the workpiece.

Description

Technical Field

[0001] The invention belongs to the field of advanced production manufacturing and automation technology, and specifically relates to a three-axis laser cutting method for groove chamfering. Background Art

[0002] Laser cutting refers to the use of laser beams to irradiate the surface of the workpiece to be cut, causing the workpiece material to melt rapidly, and at the same time, using auxiliary gas coaxial with the beam to blow away the molten material to form an incision, thereby cutting the workpiece. Since the energy of the laser cutter is very concentrated, only a small amount of heat is transferred to other parts of the blank, causing little or no deformation. The use of lasers can very accurately cut complex-shaped blanks, and the cut blanks do not need to be further processed.

[0003] According to design or process requirements, groove processing has always been an indispensable process. Groove cutting refers to processing and assembling a groove of a certain geometric shape at the welded part to be welded. Commonly used groove forms include I-shaped groove, V-shaped (with blunt edge) groove, U-shaped (with blunt edge) groove, X-shaped (with blunt edge) groove, single-sided V-shaped (with blunt edge) groove and K-shaped (with blunt edge) groove.

[0004] Traditional laser bevel cutting uses a five-axis laser cutting machine. This method is to install the laser cutting head on a five-axis CNC laser cutting machine, and drive the cutting head to rotate to the required angle through the rotation of the AB axis to form a bevel cutting. This method cuts the remaining material at the same time after the cutting head swings the angle, and the damaged remaining material cannot be used, which leads to a reduction in material utilization. In addition, the AB axis is added to the beam. Since the AB axis has a heavy deadweight and is cantilevered, the radial load of the beam axis is greatly increased. In order to eliminate the influence of the AB axis on the laser equipment, it is often chosen to reduce the dynamic performance of the equipment, reduce the acceleration of the equipment, and the normal cutting speed. The speed of the plane equipment can reach 60m / min when cutting 1mm stainless steel, while the speed of cutting 1mm stainless steel after adding the AB axis can only reach 9m / min. When it exceeds 9m / min, the cutting accuracy will not meet the requirements, which greatly reduces the efficiency of laser cutting. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a three-axis laser cutting method for bevel chamfering, which solves the problem in the prior art that when laser cutting a cut, the angle of the laser cutting head needs to be adjusted according to the chamfering characteristics of the cut, thereby reducing the speed of laser cutting and further leading to reduced cutting efficiency.

[0006] Technical solution: The present invention provides a three-axis laser cutting method for bevel chamfering, comprising the following steps:

[0007] S1. The workpiece to be processed is placed on the cutting work surface of the planar three-axis laser cutting machine;

[0008] S2. Preparation of chamfering processing files;

[0009] S3, the chamfering processing file is sent to the plane three-axis laser cutting machine;

[0010] S4. The laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine are in the same straight line, and the laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine are arranged perpendicular to the plane of the workpiece to be processed;

[0011] S5, adjusting the distance between the cutting nozzle and the edge of the cutting position of the workpiece to be processed and the distance between the cutting nozzle and the surface of the workpiece to be processed;

[0012] S6. Adjust the air pressure of the cutting nozzle of the laser cutting machine;

[0013] S7. Adjust the speed of the cutting nozzle of the laser cutting machine so that the cutting nozzle of the laser cutting machine directly ablate the chamfer shape on the workpiece to be processed along the path of the chamfer processing file. During the process of ablation of the chamfer, the laser cutting head and the cutting nozzle of the three-axis laser cutting machine always remain vertical to the workpiece to be processed.

[0014] The three-axis laser cutting method for bevel chamfering of the present invention provides an efficient and energy-saving three-axis laser bevel chamfering cutting method. This method can improve the utilization rate of processing materials without reducing the performance and efficiency of normal cutting of equipment, and does not require the modification or replacement of existing equipment, but only requires the update of equipment software and processing technology.

[0015] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the above-mentioned step S2 specifically includes the following steps:

[0016] S2-1. Add contour chamfering cutting lines and inner hole chamfering spiral cutting lines to the graphics of the workpiece to be processed in the CAD drawing;

[0017] S2-2. In the nesting software, match the cutting line of the bevel chamfer to the corresponding cutting layer. The cutting path is first cut vertically according to the graphic contour, and then the cutting is carried out again at the position where the bevel chamfer is required. If the outer contour needs to be chamfered, micro-connections need to be added to the outer contour to prevent the workpiece from falling. After the matching of various parameters is completed, the processing file is generated.

[0018] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the above-mentioned step S3 specifically includes the following steps:

[0019] Send the processing file to the flat three-axis laser cutting machine. At this time, the flat three-axis laser cutting machine needs to have fixed-height cutting, independent setting of multi-layer processes, and follow-up functions. It matches the appropriate processing parameters with the corresponding layers of the processing file. After the parameter matching is completed, the workpiece to be processed is processed. The workpiece to be processed can complete vertical and chamfer cutting at one time.

[0020] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the above-mentioned step S5 specifically includes the following steps:

[0021] S5-1. Adjust the laser cutting machine's cutting nozzle to offset the light spot by 0 to 1.5 mm to the inside of the contour where the groove needs to be chamfered.

[0022] S5-2. Adjust the distance between the laser cutting machine nozzle and the workpiece surface to be processed to 30-60 mm.

[0023] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the above-mentioned step S6 specifically includes the following steps:

[0024] Adjust the air pressure of the laser cutting machine's cutting nozzle to 5-8 bar, and set the cutting power of the planar three-axis laser cutting machine to 2000-6000W.

[0025] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the above-mentioned step S7 specifically includes the following steps:

[0026] Set the cutting speed of the planar three-axis laser cutting machine to 70-140% of the normal cutting speed of the planar three-axis laser cutting machine.

[0027] Furthermore, in the above three-axis laser cutting method for bevel chamfering, the above step S7 further includes the following steps:

[0028] The chamfering contour of the circular hole of the workpiece to be processed is processed in a spiral manner for 2 to 3 turns.

[0029] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the cutting focus of the laser cutting machine cutting nozzle is adjusted according to the material to set carbon steel to 9 to 13 mm and stainless steel to -5 to -15 mm. After this setting, bevel chamfering of 0 to 40° and 0 to 7 mm can be obtained.

[0030] Furthermore, in the above-mentioned three-axis laser cutting method for bevel chamfering, the method for adjusting the spot size of the cutting nozzle of the above-mentioned laser cutting machine is as follows:

[0031] ;

[0032] ;

[0033] ;

[0034] ;

[0035] BPP: beam parameter product, which is determined by the laser generator;

[0036] W: focal spot radius, determined by the transmission fiber diameter, collimator and focusing lens focal length;

[0037] θ: Far-field divergence angle, which is affected by the product of beam parameters and the focal spot radius;

[0038] dfocus: focal spot diameter;

[0039] Ff: focal length of focusing lens;

[0040] Fc: focal length of collimator;

[0041] dfiber: transmission optical fiber diameter;

[0042] Wz: far-field spot radius;

[0043] Zmn: The distance between the focus and the cutting material.

[0044] It can be seen from the above technical scheme that the present invention has the following beneficial effects: the three-axis laser cutting method for bevel chamfering described in the present invention does not need to adjust the angle of the cutting head, but only needs to maintain the angle between the laser cutting head and the workpiece to be processed during cutting, which can realize the ablation of workpieces with various shapes and different positions, reducing the processing difficulty, and has high processing accuracy, centralized process, stable ablation, and can significantly improve the processing efficiency of the workpiece; the control method of adjusting the position, distance, air pressure, and speed of the cutting nozzle and the workpiece to be processed and the different focus position control methods are the key to realizing ablation, which improves the consistency of the bevel surface, greatly improves the quality of the bevel surface, and increases the product yield by more than 50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the groove position and dimensions of the three-axis laser cutting method for groove chamfering of the present invention;

[0046] Figure 2 The Gaussian laser beam model diagram and related parameter diagram of the present invention;

[0047] Figure 3 This is a schematic diagram of the standard vertical cutting according to the present invention;

[0048] Figure 4 A schematic diagram of the principle of the groove chamfering cutting method of the present invention;

[0049] Figure 5 It is a schematic diagram of the CAD drawing of the groove chamfer of the present invention;

[0050] Figure 6 It is a schematic diagram of the groove chamfer cutting according to the present invention. DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] Example 1

[0057] like Figure 1 , 3 The three-axis laser cutting method for bevel chamfering shown in 4 is based on a planar three-axis laser cutting machine and includes the following steps:

[0058] S1. The workpiece to be processed is placed on the cutting work surface of the planar three-axis laser cutting machine;

[0059] S2. Preparation of chamfering processing files;

[0060] S3, the chamfering processing file is sent to the plane three-axis laser cutting machine;

[0061] S4. The laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine are in the same straight line, and the laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine are arranged perpendicular to the plane of the workpiece to be processed;

[0062] S5, adjusting the distance between the cutting nozzle and the edge of the cutting position of the workpiece to be processed and the distance between the cutting nozzle and the surface of the workpiece to be processed;

[0063] S6. Adjust the air pressure of the cutting nozzle of the laser cutting machine;

[0064] S7. Adjust the speed of the cutting nozzle of the laser cutting machine so that the cutting nozzle of the laser cutting machine directly ablate the chamfer shape on the workpiece to be processed along the path of the chamfer processing file. During the process of ablation of the chamfer, the laser cutting head and the cutting nozzle of the three-axis laser cutting machine always remain vertical to the workpiece to be processed.

[0065] The above step S2 specifically includes the following steps:

[0066] S2-1. Add contour chamfering cutting lines and inner hole chamfering spiral cutting lines to the graphics of the workpiece to be processed in the CAD drawing;

[0067] S2-2. In the nesting software, match the cutting line of the bevel chamfer to the corresponding cutting layer. The cutting path is first cut vertically according to the graphic contour, and then the cutting is carried out again at the position where the bevel chamfer is required. If the outer contour needs to be chamfered, micro-connections need to be added to the outer contour to prevent the workpiece from falling. After the matching of various parameters is completed, the processing file is generated.

[0068] The above step S3 specifically includes the following steps:

[0069] Send the processing file to the flat three-axis laser cutting machine. At this time, the flat three-axis laser cutting machine needs to have fixed-height cutting, independent setting of multi-layer processes, and follow-up functions. It matches the appropriate processing parameters with the corresponding layers of the processing file. After the parameter matching is completed, the workpiece to be processed is processed. The workpiece to be processed can complete vertical and chamfer cutting at one time.

[0070] The above step S5 specifically includes the following steps:

[0071] S5-1. Adjust the laser cutting machine's cutting nozzle's light spot to the inside of the contour that needs beveling by 0 to 1.5 mm. The purpose of this adjustment is to adjust the position of the laser energy center area at the edge of the plate. If it is greater than 1.5 mm, it will be unfavorable for cutting and cause the cutting section to be not smooth enough.

[0072] S5-2. Adjust the distance between the laser cutting machine nozzle and the plate surface of the workpiece to be processed to 30-60mm. This item is to adjust the laser spot size to change the width of the chamfered upper surface. When it exceeds 60mm, the gas assist effect is lost due to the distance being too far, and the cutting quality is reduced.

[0073] The above step S6 specifically includes the following steps:

[0074] Adjust the air pressure of the laser cutting machine's cutting nozzle to 5-8 bar, and set the cutting power of the planar three-axis laser cutting machine to 2000-6000W. The adjustment of these two items will affect the cutting depth of the chamfer. Increasing the air pressure and cutting power at the same time will increase the cutting depth, while reducing them will reduce the cutting depth.

[0075] The above step S7 specifically includes the following steps:

[0076] Set the cutting speed of the planar three-axis laser cutting machine to 70-140% of the normal cutting speed of the planar three-axis laser cutting machine. This adjustment will affect the smoothness of the cutting section. The chamfering speed of circular holes should be greater than the normal cutting speed, and the speed of straight edge contours should be less than the normal cutting speed.

[0077] Figure 3 and 4 A: cutting head, B: cutting nozzle, C: distance between cutting nozzle and workpiece surface to be processed, D: workpiece to be processed, E: cutting seam.

[0078] The above step S7 also includes the following steps:

[0079] The chamfering profile of the circular hole of the workpiece to be processed is selected in the spiral line mode for 2 to 3 turns. This adjustment is the setting of the circular hole chamfering to control the size of the circular hole chamfer. The chamfer becomes larger as the spiral offset increases, and the chamfer becomes smaller as the spiral offset decreases.

[0080] Adjust the cutting focus of the laser cutting machine nozzle according to the material setting carbon steel 9 ~ 13mm, stainless steel -5 ~ -15mm. This item is for the setting of different materials, stainless steel uses negative focus cutting, carbon steel uses positive focus cutting, according to this setting formula, you can get 0 ~ 40 ° and 0 ~ 7mm bevel chamfer cutting.

[0081] like Figure 2 The present invention shown is derived from the characteristics of Gaussian laser beams, the amplitude distribution of its cross section obeys the Gaussian function, and the transmission characteristics of Gaussian beams are that they spread at a specific angle along the propagation direction at a distance, which is the far-field divergence angle of the beam, that is, the angle between a pair of asymptotes, which is proportional to the wavelength and inversely proportional to its beam waist radius. Therefore, the smaller the beam waist radius, the faster the spot diverges; the larger the beam waist radius, the slower the spot diverges. The present invention realizes the cutting process of chamfers of different widths of grooves by real-time control of the far-field spot size. Figure 2 W: intersection spot radius, θ: beam divergence angle, W(Z): far end spot radius, Zmn: distance from intersection to material, Z: Gaussian laser beam.

[0082] The method for adjusting the spot size of the cutting nozzle of the above laser cutting machine is as follows:

[0083] ;

[0084] ;

[0085] ;

[0086] ;

[0087] BPP: beam parameter product, which is determined by the laser generator. The BPP used in the present invention is 4 mm*mrad;

[0088] W: focal spot radius, which is determined by the fiber diameter of the transmission fiber, the focal length of the collimator and the focusing lens. In the present invention, the focal spot radius is 100um;

[0089] θ: Far-field divergence angle, which is affected by the product of beam parameters and the focal spot radius;

[0090] dfocus: focal spot diameter;

[0091] Ff: focal length of focusing lens;

[0092] Fc: focal length of collimator;

[0093] dfiber: transmission optical fiber diameter;

[0094] Wz: far-field spot radius;

[0095] Zmn: The distance between the focus and the cutting material.

[0096] From the above far-field spot size adjustment formula, we can get that the far-field spot size can be adjusted by adjusting the distance between the Zmm focus and the material. When Zmn increases, the far-field spot size increases accordingly, and when Zmn decreases, the far-field spot size decreases accordingly.

[0097] The groove size follows the changes in the following table, where Dw is the groove width, Dv is the groove depth, Do is the spot center offset distance, and A is the groove angle.

[0098]

[0099] The following embodiments describe in detail the specific implementation of the groove chamfering of the present invention. The product forming diagram of the groove chamfering cutting using the ablation solution of the present invention is shown in FIG. Figure 5 , 6 As shown, F: spiral line of circular hole chamfer, G: offset line of groove chamfer, H, I, J: all are groove chamfers.

[0100] Example 2

[0101] For 12mm carbon steel bevel chamfer cutting, the contour to be chamfered is offset by 1mm in CAD drawing, and a matching processing file is generated in the nesting software. On the three-axis plane CNC laser cutting system, the cutting power of the bevel chamfer cutting layer is adjusted to 2000W, the cutting speed is adjusted to 1.4m / min, the cutting pressure is adjusted to 5bar, oxygen is used as gas, the distance between the cutting nozzle and the plate surface is 40mm, the focus is adjusted to +9mm, and the bevel chamfer cutting process parameters are configured according to this formula for cutting, and a bevel chamfer with a depth of 6.03mm and an angle of 18.5° can be obtained.

[0102] Example 3

[0103] For 12mm carbon steel bevel chamfer cutting, the contour to be chamfered is offset by 1.5mm in CAD drawing, and a matching processing file is generated in the nesting software. On the three-axis plane CNC laser cutting system, the cutting power of the bevel chamfer cutting layer is adjusted to 4000W, the cutting speed is adjusted to 1.3m / min, the cutting pressure is adjusted to 5bar, oxygen is used as gas, the distance between the cutting nozzle and the plate surface is 50mm, and the focus is adjusted to +12mm. According to this formula, the bevel chamfer cutting process parameters are configured for cutting, and a bevel chamfer with a depth of 5.1mm and an angle of 35.4° can be obtained.

[0104] Example 4

[0105] For 20mm carbon steel bevel chamfer cutting, the contour to be chamfered is offset by 1.5mm in CAD drawing, and a matching processing file is generated in the nesting software. On the three-axis plane CNC laser cutting system, the cutting power of the bevel chamfer cutting layer is adjusted to 5500W, the cutting speed is adjusted to 1.3m / min, the cutting pressure is adjusted to 5bar, oxygen is used as gas, the distance between the cutting nozzle and the plate surface is 55mm, and the focus is adjusted to +13mm. According to this formula, the bevel chamfer cutting process parameters are configured for cutting, and a bevel chamfer with a depth of 6.21mm and an angle of 23.3° can be obtained.

[0106] Example 5

[0107] 20mm carbon steel groove chamfer cutting, add 2 spiral lines to the circular hole to be chamfered in CAD drawing, generate matching processing files in the nesting software, and adjust the cutting power of the circular hole groove chamfering layer on the three-axis plane CNC laser cutting system to 3500W, the cutting speed to 2m / min, the cutting pressure to 6bar, oxygen gas, the distance between the cutting nozzle and the plate surface is 40mm, and the focus is adjusted to +13mm. According to this formula, the groove chamfering cutting can obtain a groove chamfer with a depth of 3.44mm and an angle of 37.5°.

[0108] Example 6

[0109] For 10mm stainless steel bevel chamfer cutting, the contour to be chamfered is offset by 1mm in CAD drawing, and a matching processing file is generated in the nesting software. The cutting power of the bevel chamfer layer on the three-axis plane CNC laser cutting system is adjusted to 5000W, the cutting speed is adjusted to 1.5m / min, the cutting pressure is adjusted to 8bar, oxygen is used as the gas, the distance between the cutting nozzle and the plate surface is 40mm, and the focus is adjusted to -15mm. According to this formula, the bevel chamfer cutting can obtain a bevel chamfer with a depth of 5.07mm and an angle of 21.3°.

[0110] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A three-axis laser cutting method for bevel chamfering, characterized in that: The steps include: S1. The workpiece to be processed is placed on the cutting work surface of the planar three-axis laser cutting machine; S2. Preparation of groove chamfering processing files; S3, the groove chamfering processing file is sent to the plane three-axis laser cutting machine; S4. The laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine are in the same straight line, and the laser cutting head and the cutting nozzle of the planar three-axis laser cutting machine are arranged perpendicular to the plane of the workpiece to be processed; S5, adjusting the distance between the cutting nozzle and the edge of the cutting position of the workpiece to be processed and the distance between the cutting nozzle and the surface of the workpiece to be processed; S6. Adjust the air pressure of the cutting nozzle of the laser cutting machine; S7. Adjust the speed of the cutting nozzle of the laser cutting machine so that the cutting nozzle of the laser cutting machine follows the path of the groove chamfering processing file, and realize the cutting processing of groove chamfers of different widths by real-time control of the far-field spot size, and directly ablate the groove chamfer shape on the workpiece to be processed. In the process of ablation of the groove chamfer, the laser cutting head and the cutting nozzle of the three-axis laser cutting machine are always kept in a vertical state with the workpiece to be processed; The above step S5 specifically includes the following steps: S5-1. Adjust the laser cutting machine's cutting nozzle to offset the light spot by 0 to 1.5 mm to the inside of the contour where the groove needs to be chamfered. S5-2, adjust the distance between the laser cutting machine nozzle and the plate surface of the workpiece to be processed to 30-60mm; The above step S2 specifically includes the following steps: S2-1. Add contour chamfering cutting lines and inner hole chamfering spiral cutting lines to the graphics of the workpiece to be processed in the CAD drawing; S2-2. In the nesting software, match the cutting line of the groove chamfer to the corresponding cutting layer. The cutting path is first cut vertically according to the outline of the graphic, and then the cutting is carried out again at the position where the groove chamfer is required. If the outer contour needs to be chamfered, micro-connection needs to be added to the outer contour to prevent the workpiece from falling. After the matching of various parameters is completed, the processing file is generated; The above step S3 specifically includes the following steps: Send the processing file to the three-axis flat laser cutting machine. The three-axis flat laser cutting machine needs to have the functions of fixed-height cutting, independent setting of multi-layer processes, and follow-up. It matches the appropriate processing parameters with the corresponding layers of the processing file. After the parameters are matched, the workpiece to be processed is processed. The workpiece to be processed can complete vertical and chamfer cutting at one time. The above step S6 specifically includes the following steps: Adjust the air pressure of the laser cutting machine nozzle to 5-8 bar, and set the cutting power of the plane three-axis laser cutting machine to 2000-6000W; The above step S7 specifically includes the following steps: Set the cutting speed of the planar three-axis laser cutting machine to 70-140% of the normal cutting speed of the planar three-axis laser cutting machine; The above step S7 also includes the following steps: The chamfering contour of the circular hole of the workpiece to be processed is made by spiral line method for 2 to 3 turns; Adjust the cutting focus of the laser cutting machine nozzle according to the material setting, carbon steel 9 ~ 13mm, stainless steel -5 ~ -15mm, according to this setting, you can get 0 ~ 40 ° and 0 ~ 7mm bevel chamfer cutting; The method for adjusting the spot size of the cutting nozzle of the above laser cutting machine is as follows: ； ； ； ； BPP: beam parameter product, which is determined by the laser generator; W: focal spot radius, determined by the transmission fiber diameter, collimator and focusing lens focal length; θ: Far-field divergence angle, which is affected by the product of beam parameters and the focal spot radius; dfocus: focal spot diameter; Ff: focal length of focusing lens; Fc: focal length of collimator; dfiber: transmission optical fiber diameter; Wz: far-field spot radius; Zmn: The distance between the focus and the cutting material.

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