Stainless steel plate laser cutting equipment and use method thereof

Abstract

The present invention discloses a stainless steel plate laser cutting device and a method for using the same, and relates to the field of laser cutting technology, including the following steps: S1, placing the stainless steel plate on a workbench for calibration and positioning, inputting the stainless steel plate parameters and the expected number of cutting rounds, and setting the cutting depth of each round; S2, setting the cutting angle and the first cutting distance of the upper laser head and the lower laser head, and controlling the upper and lower laser heads to perform multiple cuttings; S3, resetting the cutting angle and the single cutting distance of the upper laser head and the lower laser head, and performing multiple cuttings with the end of the first cutting path in S1 as the starting point; S4, looping through steps S2 to S3 for N rounds before rolling up the stainless steel plate. The present invention ensures the accuracy of cutting through calibration and positioning, and improves the consistency and precision of cutting; and adopts a multi-group cutting design with opposite cutting angles, which increases the flexibility of cutting and improves the cutting efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to a stainless steel plate laser cutting device and a use method thereof. Background Art

[0002] Laser cutting is one of the thermal cutting methods. Most organic and inorganic materials can be cut by laser. In the metal processing industry, which occupies a large part of the industrial manufacturing system, many metal materials, no matter what their hardness, can be cut without deformation. Laser cutting has no burrs, wrinkles, high precision, and is better than plasma cutting. For many electromechanical manufacturing industries, since the modern laser cutting system controlled by microcomputer programs can easily cut workpieces of different shapes and sizes, it is often preferred over punching and molding processes; although its processing speed is slower than die punching, it has no mold consumption, no need to repair the mold, and saves time to replace the mold, thereby saving processing costs and reducing production costs, so it is more cost-effective overall.

[0003] Laser cutting uses a focused high-power density laser beam to irradiate the workpiece, quickly heating the material to the vaporization temperature and evaporating to form holes. As the beam moves across the material, the holes continuously form narrow slits, causing the irradiated material to quickly melt, vaporize, ablate or reach the ignition point. At the same time, the molten material is blown away by a high-speed airflow coaxial with the beam, thereby cutting the workpiece.

[0004] In the prior art, the laser beam is usually directly irradiated on the material to be cut. As the beam and the material move linearly relative to each other, the holes are continuously formed into a narrow slit, which cuts the material to be cut. This method has the characteristics of small laser spot, high energy density and fast cutting speed. However, during cutting, the laser beam is concentrated at the slit, resulting in uneven stress distribution at the slit, causing slight deformation at the cutting edge of the formed material, which affects the cutting effect.

[0005] Therefore, a stainless steel plate laser cutting device and a method for using the same are developed to solve the above problems. Summary of the invention

[0006] The present invention overcomes the deficiencies of the prior art and provides a stainless steel plate laser cutting device and a method for using the same.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a method for using a stainless steel plate laser cutting device, characterized in that it comprises the following steps:

[0008] S1. Calibration and positioning: Place the stainless steel plate on the workbench for calibration and positioning, input the width D and thickness H of the stainless steel plate and the desired number of cutting rounds N, and set the cutting depth of each round to h = H / 2N;

[0009] S2, initial angle cutting: set the cutting angle α of the upper laser head and the first cutting distance L of the upper laser head, the cutting angle β of the lower laser head and the first cutting distance S of the lower laser head, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is d;

[0010] S3, reverse angle cutting: set the cutting angle of the upper laser head to -α and the cutting angle of the lower laser head to -β, the single cutting distance of the upper laser head and the lower laser head are both R, take the end of the first cutting path in S1 as the starting point, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is R;

[0011] S4, after N rounds of cycles of steps S2 to S3, the cutting is completed and the stainless steel plate is rolled up.

[0012] In a preferred embodiment of the present invention, in S2, the cutting angle of the upper laser head is 1°≤α≤3°, and the cutting angle of the lower laser head is 3°<β≤5°.

[0013] In a preferred embodiment of the present invention, in S2, the relationship between the first cutting distance L of the upper laser head, the first cutting distance S of the lower laser head and the cutting path spacing d is one of L:S:d=1:1 / 3~2 / 3:1 and L:S:d=1 / 3~2 / 3:1:1.

[0014] In a preferred embodiment of the present invention, in S2, controlling the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side includes the following steps:

[0015] S21, the upper laser head cuts one side of the stainless steel plate by a length of L, and the lower laser head cuts the other side of the stainless steel plate by a length of S, and the end coordinates of the first cutting paths of the upper laser head and the lower laser head are recorded;

[0016] S22, the upper laser head and the lower laser head stop cutting, and both move a distance d along the cutting direction;

[0017] S23, loop steps S21 and S22 until the total cutting distance of the upper laser head N*(L+d)=D, the total cutting distance of the lower laser head N*(S+d)=D, and the initial angle cutting is completed.

[0018] In a preferred embodiment of the present invention, in S3, starting from the end of the first cutting path in S1, the upper and lower laser heads are controlled to perform multiple cutting from one side of the stainless steel plate to the other side, and the specific steps are as follows:

[0019] S31, reading the coordinates of the end of the first cutting path of the upper laser head (X1, Y1) and the coordinates of the end of the first cutting path of the lower laser head (X2, Y2) recorded in S1;

[0020] S32, set the starting point coordinates of the reverse angle cutting of the upper laser head to (X1, Y1), and the starting point coordinates of the reverse angle cutting of the lower laser head to (X2, Y2), and both cut a length R toward the other end of the stainless steel plate;

[0021] S33, the upper laser head and the lower laser head stop cutting, and both move a distance R along the cutting direction;

[0022] S34, loop steps S32 and S33 until the total cutting distance of the upper laser head is X1+N*(R+R)=D, and the total cutting distance of the lower laser head is Y1+N*(R+R)=D, and the reverse angle cutting is completed.

[0023] In a preferred embodiment of the present invention, in S3, the cutting angle of the upper laser head is 3°<|-α|≤5°, and the cutting angle of the lower laser head is 1°≤|-β|≤3°.

[0024] In a preferred embodiment of the present invention, in said S4, when looping through steps S2 to S3, the starting point of each cutting path of the upper laser head will be moved back by a single cutting distance value compared to the starting point of each cutting path of the lower laser head.

[0025] In a preferred embodiment of the present invention, in S1, the specific steps of placing the stainless steel plate on the workbench for calibration and positioning are as follows:

[0026] S11. Place the stainless steel plate on the workbench and fix the plate on the workbench using a plate positioning clamp;

[0027] S12. Adjust the upper laser head and the lower laser head to be perpendicular to the surface of the stainless steel plate and to the cutting position to complete the calibration and positioning.

[0028] The present invention also provides a stainless steel plate laser cutting device, comprising: a workbench, a winding part arranged at one end of the workbench, a plurality of control parts arranged at both sides of the winding part, and a cutting part connected to the control part, characterized in that:

[0029] The control unit includes: a pushing component arranged at one end of the workbench, a moving component arranged in the middle of the workbench, and a control panel connected to the moving component;

[0030] The pushing assembly comprises: a plurality of pushing rails arranged on one side of the workbench, and a pushing motor group arranged at one end of the pushing rails; the motor group is used to provide forward power;

[0031] The moving assembly includes: a plurality of support columns arranged on both sides of the workbench, a first slide rail arranged between the support columns, a second slide rail arranged on the first slide rail, and a first drag chain for connecting the first slide rail and the second slide rail;

[0032] The cutting part includes: a cutting pad arranged on the second slide rail, a cutting motor group arranged on the cutting pad, and a laser head electrically connected to the cutting motor group; a second drag chain is arranged between the cutting pad and the second slide rail.

[0033] In a preferred embodiment of the present invention, the winding portion is arranged at one end of the workbench in a direction away from the pushing component, and includes: a winding table, a plurality of winding rollers arranged on one side of the winding table, and a winding motor connected to the winding rollers.

[0034] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0035] (1) The present invention provides a stainless steel plate laser cutting device and a method for using the same. The device ensures cutting accuracy through calibration and positioning. The user only needs to input the stainless steel plate parameters and the desired number of cutting rounds, and the device will automatically calculate the cutting depth of each round, which greatly reduces human errors and improves the consistency and accuracy of cutting. The device adopts a two-group cutting design, each group of cutting has a specific cutting angle and distance, which not only increases the flexibility of cutting, but also can handle various complex stainless steel plate shapes, thereby improving cutting efficiency.

[0036] (2) By inputting the parameters of the stainless steel plate and the desired number of cutting rounds, the present invention can automatically calculate the depth of each cutting round, thereby ensuring that each cutting round can reach the expected depth, improving the cutting accuracy and consistency. The calibration positioning not only simplifies the operation process, but also greatly reduces human errors and improves work efficiency.

[0037] (3) After setting the cutting angle and distance of the upper and lower laser heads, the present invention controls the laser head to perform multiple cutting from one side to the other. This multi-round cutting method can ensure the accuracy and depth of the cutting, while reducing the burrs in the heat-affected zone and the cutting edge, thereby improving the cutting quality. In addition, by adjusting the cutting path spacing of the laser head, the cutting effect can be further optimized and material waste can be reduced.

[0038] (4) In the reverse angle cutting, the present invention sets the cutting angles of the upper and lower laser heads to be opposite, which helps to further remove the burrs and heat-affected zones left after the first round of cutting and improve the smoothness of the cut surface. At the same time, by adjusting the single cutting distance, the roughness of the material surface can be better controlled to meet the needs of different applications.

[0039] (5) This method can gradually improve the cutting effect and finally obtain a high-quality cutting surface; after N rounds of cutting are completed, the stainless steel plate will be rolled up for subsequent processing or transportation. This continuous cutting method greatly improves production efficiency and reduces manual intervention and downtime. At the same time, the cycle cutting also helps to maintain the temperature and pressure inside the equipment stable, further improving the cutting quality.

[0040] (6) The present invention arranges multiple rounds of cutting, each of which cuts at the same depth, so that the stress can be evenly distributed on different levels, avoiding excessive local stress that may be caused by direct cutting; and the angles of the upper and lower laser heads are alternated, and the cutting paths of each round are also alternated, so that the stress can be avoided from being concentrated in only one direction, thereby reducing the degree of stress concentration;

[0041] At the same time, cutting is stopped after each round of cutting, and cutting is performed again after moving a certain distance, so that the stress is released, which solves the problem that stress is difficult to release after a one-time cutting in the prior art; at the same time, the spacing of each cutting path remains consistent, which can make the stress distribution more uniform, and will not cause local stress points to appear due to changes in path spacing, further improving the uniformity of stress distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 is a flow chart of a preferred embodiment of the present invention;

[0044] Figure 2 is an overall three-dimensional structural diagram of a preferred embodiment of the present invention;

[0045] Figure 3 is an overall three-dimensional structural diagram of a control unit and a cutting unit of a preferred embodiment of the present invention;

[0046] In the figure: 1. workbench; 2. winding section; 21. winding table; 22. winding roller; 23. winding motor; 3. control section; 31. pushing assembly; 311. pushing rail; 312. pushing motor group; 32. moving assembly; 321. supporting column; 322. first slide rail; 323. second slide rail; 324. first drag chain; 4. cutting section; 41. cutting pad; 42. cutting motor group; 43. laser head; 44. second drag chain. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] like Figure 1 As shown, the present invention provides a method for using a stainless steel plate laser cutting device, which is characterized by comprising the following steps:

[0049] S1. Calibration and positioning: Place the stainless steel plate on the workbench for calibration and positioning, input the width D and thickness H of the stainless steel plate and the desired number of cutting rounds N, and set the cutting depth of each round to h = H / 2N;

[0050] S2, initial angle cutting: set the cutting angle α of the upper laser head and the first cutting distance L of the upper laser head, the cutting angle β of the lower laser head and the first cutting distance S of the lower laser head, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is d;

[0051] S3, reverse angle cutting: set the cutting angle of the upper laser head to -α and the cutting angle of the lower laser head to -β, the single cutting distance of the upper laser head and the lower laser head are both R, take the end of the first cutting path in S1 as the starting point, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is R;

[0052] S4. After N rounds of cycles of steps S2 to S3, the cutting is completed and the stainless steel plate is rolled up by the rolling unit.

[0053] In S1, the stainless steel plate is placed on the workbench and calibrated and positioned as follows:

[0054] S11. Place the stainless steel plate on the workbench and fix the plate on the workbench using a plate positioning clamp;

[0055] S12. Adjust the upper laser head and the lower laser head to be perpendicular to the surface of the stainless steel plate and to the cutting position to complete the calibration and positioning.

[0056] By inputting the parameters of the stainless steel plate and the desired number of cutting rounds in S1, the equipment can automatically calculate the depth of each cutting round, which can ensure that each round of cutting can reach the expected depth, improve the accuracy and consistency of cutting, and the calibration positioning not only simplifies the operation process, but also greatly reduces human errors and improves work efficiency.

[0057] In S2, the cutting angle of the upper laser head is 1°≤α≤3°, and the cutting angle of the lower laser head is 3°<β≤5°.

[0058] In S2, the relationship between the first cutting distance L of the upper laser head, the first cutting distance S of the lower laser head and the cutting path spacing d is one of L:S:d=1:1 / 3~2 / 3:1 and L:S:d=1 / 3~2 / 3:1:1.

[0059] In S2, controlling the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side includes the following steps:

[0060] S21, the upper laser head cuts one side of the stainless steel plate by a length of L, and the lower laser head cuts the other side of the stainless steel plate by a length of S, and the end coordinates of the first cutting paths of the upper laser head and the lower laser head are recorded;

[0061] S22, the upper laser head and the lower laser head stop cutting, and both move a distance d along the cutting direction;

[0062] S23, loop steps S21 and S22 until the total cutting distance of the upper laser head N*(L+d)=D, the total cutting distance of the lower laser head N*(S+d)=D, and the initial angle cutting is completed.

[0063] Step S2: After setting the cutting angle and distance of the upper and lower laser heads, control the laser head to perform multiple cuts from one side to the other. This multi-round cutting method can ensure the accuracy and depth of the cutting, while reducing the burrs in the heat-affected zone and the cutting edge, and improving the cutting quality. In addition, by adjusting the cutting path spacing of the laser head, the cutting effect can be further optimized and material waste can be reduced.

[0064] In S3, starting from the end of the first cutting path in S1, the upper and lower laser heads are controlled to perform multiple cutting from one side of the stainless steel plate to the other side. The specific steps are as follows:

[0065] S31, reading the coordinates of the end of the first cutting path of the upper laser head (X1, Y1) and the coordinates of the end of the first cutting path of the lower laser head (X2, Y2) recorded in S1;

[0066] S32, set the starting point coordinates of the reverse angle cutting of the upper laser head to (X1, Y1), and the starting point coordinates of the reverse angle cutting of the lower laser head to (X2, Y2), and both cut a length R toward the other end of the stainless steel plate;

[0067] S33, the upper laser head and the lower laser head stop cutting, and both move a distance R along the cutting direction;

[0068] S34, loop steps S32 and S33 until the total cutting distance of the upper laser head is X1+N*(R+R)=D, and the total cutting distance of the lower laser head is Y1+N*(R+R)=D, and the reverse angle cutting is completed.

[0069] In S3, the cutting angle of the upper laser head is 3°<|-α|≤5°, and the cutting angle of the lower laser head is 1°≤|-β|≤3°.

[0070] In the reverse angle cutting of S3, setting the cutting angles of the upper and lower laser heads to opposite angles helps to further remove the burrs and heat-affected zones left after the first round of cutting and improve the smoothness of the cut surface. At the same time, by adjusting the single cutting distance, the roughness of the material surface can be better controlled to meet the needs of different applications.

[0071] In S4, when the steps S2 to S3 are looped, the starting point of each cutting path of the upper laser head will be moved back by a single cutting distance value compared with the starting point of each cutting path of the lower laser head.

[0072] After N rounds of cutting are completed, the stainless steel plate will be rolled up for subsequent processing or transportation. This continuous cutting method greatly improves production efficiency and reduces manual intervention and downtime. At the same time, cycle cutting also helps to maintain stable temperature and pressure inside the equipment, further improving cutting quality.

[0073] This method performs a round of reverse cutting after the initial angle cutting. This forward and reverse cutting method helps to reduce stress concentration at the cut. The forward and reverse cutting paths can offset part of the stress and make the stress distribution near the cut more uniform. Multiple cycles of cutting can further reduce the possibility of stress concentration and improve cutting stability and the quality of the finished product.

[0074] like Figure 2 As shown, the present invention also provides a stainless steel plate laser cutting device, comprising: a workbench 1, a winding part 2 arranged at one end of the workbench 1, a plurality of control parts 3 arranged on both sides of the winding part 2, and a cutting part 4 connected to the control part 3, characterized in that:

[0075] The control unit 3 includes: a pushing component 31 arranged at one end of the workbench 1 , a moving component 32 arranged in the middle of the workbench 1 , and a control panel connected to the moving component 32 .

[0076] The pushing assembly 31 includes: a plurality of pushing rails 311 arranged on one side of the workbench 1, and a pushing motor group 312 arranged at one end of the pushing rails 311; the motor group is used to provide forward power.

[0077] The pushing motor group 312 includes: a pushing reduction motor connected to the workbench 1, and a pushing servo motor connected to the pushing reduction motor.

[0078] The moving assembly 32 includes: a plurality of support columns 321 arranged on both sides of the workbench 1, a first slide rail 322 arranged between the support columns 321, a second slide rail 323 arranged on the first slide rail 322, and a first drag chain 324 for connecting the first slide rail 322 and the second slide rail 323.

[0079] The first slide rail 322 is connected to the second slide rail 323 via a movable support frame, and a first movable motor group is arranged on the support frame. The first movable motor group includes: a first movable reduction motor connected to the support frame, and a first movable servo motor connected to the first movable reduction motor.

[0080] like Figure 3 As shown, the cutting part 4 includes: a cutting pad 41 arranged on the second slide rail 323, a cutting motor group 42 arranged on the cutting pad 41, and a laser head 43 electrically connected to the cutting motor group 42; a second drag chain 44 is arranged between the cutting pad 41 and the second slide rail 323.

[0081] A second moving motor group is also provided on the cutting pad 41 , and the second moving motor group includes: a second moving reduction motor connected to the cutting pad 41 , and a second moving servo motor connected to the second moving reduction motor.

[0082] The cutting motor group 42 includes: a first cutting support frame connected to the cutting pad 41, a first cutting motor arranged on the first cutting support frame, a second cutting support frame connected to the first cutting motor, and a second cutting motor arranged on the second cutting support frame; the second cutting motor is connected to the laser head 43.

[0083] An upper laser head 43 is provided on the cutting part 4 connected to the control part 3 arranged on one side of the winding part 2 , and a lower laser head 43 is provided on the cutting part 4 connected to the control part 3 arranged on the other side of the winding part 2 .

[0084] The winding section 2 is arranged at one end of the workbench 1 in a direction away from the pushing assembly 31 , and comprises: a winding platform 21 , a plurality of winding rollers 22 arranged on one side of the winding platform 21 , and a winding motor 23 connected to the winding rollers 22 .

[0085] The control panel includes: a parameter input module, a parameter calculation module, a laser emission module, a distance measurement module, and a coordinate recording module which are arranged inside the control panel.

[0086] The parameter input module is used to input the width data and thickness data of the stainless steel plate, the expected number of cutting rounds, the cutting angles of the upper laser head 43 and the lower laser head 43, the first cutting distance and the single cutting distance of the upper laser head 43 and the lower laser head 43, and the cutting path spacing.

[0087] The parameter calculation module is used to calculate the cutting depth of each round and the total cutting distance of the upper laser head 43 and the lower laser head 43 .

[0088] The laser emission module is used to synchronously adjust the upper laser head 43 and the lower laser head 43 according to input parameters.

[0089] The distance measurement module is used to measure the first cut distance and single cut distance, as well as the cutting path spacing on stainless steel plates.

[0090] The coordinate recording module is used to record the coordinates of the first cutting paths of the upper laser head 43 and the lower laser head 43 .

[0091] The equipment ensures cutting accuracy through calibration and positioning. Users only need to input the stainless steel plate parameters and the desired number of cutting rounds, and the cutting depth of each round will be automatically calculated, which greatly reduces human errors and improves cutting consistency and accuracy. The equipment adopts a two-round cutting design, and each round of cutting has a specific cutting angle and distance, which not only increases the flexibility of cutting, but also can handle various complex stainless steel plate shapes, improving cutting efficiency.

[0092] Example 1

[0093] This embodiment provides a method for laser cutting a stainless steel plate with a width of 1 m and a thickness of 5 cm, including the following steps:

[0094] S1. Calibration and positioning: Place the stainless steel plate on the workbench for calibration and positioning. Input the width of the stainless steel plate as 1m, the thickness as 5cm, and the desired number of cutting rounds as 5. Then set the cutting depth of each round as h = 0.1m.

[0095] S2, initial angle cutting: set the cutting angle of the upper laser head to 1° and the first cutting distance of the upper laser head to 0.15m, the cutting angle of the lower laser head to 3.5° and the first cutting distance of the lower laser head to 0.15m, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is 0.05m;

[0096] S3, reverse angle cutting: set the cutting angle of the upper laser head to -3.5° and the cutting angle of the lower laser head to -1°, the single cutting distance of the upper laser head and the lower laser head are both 0.085m, take the end of the first cutting path in S1 as the starting point, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is 0.085m;

[0097] S4. After 5 cycles of S2 to S3, the cutting is completed and the stainless steel plate is rolled up by the rolling unit.

[0098] Example 2

[0099] This embodiment provides a method for laser cutting a stainless steel plate with a width of 1 m and a thickness of 5 cm, including the following steps:

[0100] S1. Calibration and positioning: Place the stainless steel plate on the workbench for calibration and positioning. Input the width of the stainless steel plate as 1m, the thickness as 5cm, and the desired number of cutting rounds as 5. Then set the cutting depth of each round as h = 0.1m.

[0101] S2, initial angle cutting: set the cutting angle of the upper laser head to 3° and the first cutting distance of the upper laser head to 0.15m, the cutting angle of the lower laser head to 5° and the first cutting distance of the lower laser head to 0.15m, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is 0.05m;

[0102] S3, reverse angle cutting: set the cutting angle of the upper laser head to -5° and the cutting angle of the lower laser head to -3°, the single cutting distance of the upper laser head and the lower laser head are both 0.085m, take the end of the first cutting path in S1 as the starting point, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is 0.085m;

[0103] S4. After 5 cycles of S2 to S3, the cutting is completed and the stainless steel plate is rolled up by the rolling unit.

[0104] Comparative Example 1

[0105] This embodiment provides a method for laser cutting a stainless steel plate with a width of 1 m and a thickness of 5 cm, including the following steps:

[0106] S1. Calibration and positioning: Place the stainless steel plate on the workbench and calibrate and position it;

[0107] S2, cutting: control the laser head to cut the stainless steel plate, the laser emission direction is perpendicular to the surface of the stainless steel plate, and the cutting length is the width of the stainless steel plate;

[0108] S3. After cutting is completed, the stainless steel plate is rolled up by the rolling unit.

[0109] Experimental Example 1

[0110] The following tests were performed on the stainless steel plates obtained in Example 1, Example 2 and Comparative Example 1:

[0111] (1) Edge burr ratio test, the test method is as follows:

[0112] One sample was randomly selected from the stainless steel plates obtained in Example 1, Example 2 and Comparative Example 1 for testing; an MM-400N microscope was used to illuminate the cut edge of the sample in a strong light source environment with a luminous flux of 300 lumens and a color temperature of 4500K, so as to more accurately observe the burr condition of the cut edge.

[0113] Observe the burr situation of the cutting surface through the MM-400N microscope, the observation length is 0.05m, record the number, size and distribution of the burrs; calculate the ratio of the number of burrs to the total area of ​​the cutting surface, that is, the burr ratio. The following formula can be used for calculation: Burr ratio = (number of burrs / total area of ​​the cutting surface) × 100%; record the calculated burr ratio and summarize it in Table 2.

[0114] The burr degree is determined as follows:

[0115] A: The burr ratio is less than 3%;

[0116] B: The burr ratio is more than 3% and less than 5%;

[0117] C: The burr ratio is greater than 5%.

[0118] (2) Testing the tensile properties and compressive strength of the steel plates: According to GB / T1040-1992, the stainless steel plates obtained in Example 1 and Example 2 and Comparative Example 1 were tested using a universal material testing machine at a test speed of 10 mm / min. The test results are summarized in Table 2.

[0119] Table 1 Stainless steel plate performance data table

[0120]

[0121]

[0122] In the above table, tensile strength and compressive strength respectively represent the strength of the experimental group of materials under tension and compression. The higher the value, the greater the strength of the material; the number of burrs refers to the number of burrs on the surface of the experimental group of materials, and the smaller the value, the lower the degree of burrs; the burr degree level is represented by letters A, B, and C, with A level representing the least burrs and C level representing the most burrs.

[0123] From the above data, it can be seen that compared with Example 1, Example 2 has higher tensile strength and burr number, and the burr degree level is A, which is worse than Example 1; Comparative Example 1 performs worse than Example 1 and Example 2 in all indicators, and its tensile strength and compressive strength are the lowest, the number of burrs is the largest, and the burr degree level is C.

[0124] In short, Example 2 performs best, followed by Example 1, and Comparative Example 1 performs worst. The material strength and burr performance of Example 2 are better than those of the other two experimental groups; compared with the prior art, the present method can disperse stress and make the stress distribution more uniform. At the same time, compared with vertical cutting, the present method uses multiple rounds of cutting combined with angle cutting to reduce the number of burrs at the cutting seam.

[0125] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A stainless steel plate laser cutting method, characterized in that: The following steps are involved: S1. Calibration and positioning: Place the stainless steel plate on the workbench for calibration and positioning, input the width D and thickness H of the stainless steel plate and the desired number of cutting rounds N, and set the cutting depth of each round to h = H / 2N; S2, initial angle cutting: set the cutting angle α of the upper laser head and the first cutting distance L of the upper laser head, the cutting angle β of the lower laser head and the first cutting distance S of the lower laser head, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is d; S3, reverse angle cutting: set the cutting angle of the upper laser head to -α and the cutting angle of the lower laser head to -β, the single cutting distance of the upper laser head and the lower laser head are both R, take the end of the first cutting path in S1 as the starting point, control the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side, and the cutting path spacing is R; S4, after N rounds of cycles of steps S2 to S3, the cutting is completed and the stainless steel plate is rolled up.

2. A stainless steel plate laser cutting method according to claim 1, characterized in that: In S2, the cutting angle of the upper laser head is 1°≤α≤3°, and the cutting angle of the lower laser head is 3°<β≤5°.

3. A stainless steel plate laser cutting method according to claim 1, characterized in that: In S2, the relationship between the first cutting distance L of the upper laser head, the first cutting distance S of the lower laser head and the cutting path spacing d is one of L:S:d=1:1 / 3~2 / 3:1 and L:S:d=1 / 3~2 / 3:1:

1.

4. A stainless steel plate laser cutting method according to claim 1, characterized in that: In S2, controlling the upper and lower laser heads to perform multiple cutting from one side of the stainless steel plate to the other side includes the following steps: S21, the upper laser head cuts one side of the stainless steel plate by a length of L, and the lower laser head cuts the other side of the stainless steel plate by a length of S, and the end coordinates of the first cutting paths of the upper laser head and the lower laser head are recorded; S22, the upper laser head and the lower laser head stop cutting, and both move a distance d along the cutting direction; S23, loop steps S21 and S22 until the total cutting distance of the upper laser head N*(L+d)=D, the total cutting distance of the lower laser head N*(S+d)=D, and the initial angle cutting is completed.

5. The stainless steel plate laser cutting method according to claim 1, characterized in that: In S3, starting from the end of the first cutting path in S1, the upper and lower laser heads are controlled to perform multiple cutting from one side of the stainless steel plate to the other side. The specific steps are as follows: S31, reading the coordinates of the end of the first cutting path of the upper laser head (X1, Y1) and the coordinates of the end of the first cutting path of the lower laser head (X2, Y2) recorded in S1; S32, set the starting coordinates of the reverse angle cutting of the upper laser head to (X1, Y1), and the starting coordinates of the reverse angle cutting of the lower laser head to (X2, Y2), and both cut a length R toward the other end of the stainless steel plate; S33, the upper laser head and the lower laser head stop cutting, and both move a distance R along the cutting direction; S34, loop steps S32 and S33 until the total cutting distance of the upper laser head is X1+N*(R+R)=D, and the total cutting distance of the lower laser head is Y1+N*(R+R)=D, and the reverse angle cutting is completed.

6. A stainless steel plate laser cutting method according to claim 1, characterized in that: In S3, the cutting angle of the upper laser head is 3°<|-α|≤5°, and the cutting angle of the lower laser head is 1°≤|-β|≤3°.

7. The stainless steel plate laser cutting method according to claim 1, characterized in that: In the above S4, when the steps S2 to S3 are cycled, the starting point of each cutting path of the upper laser head will be moved back by a single cutting distance value compared with the starting point of each cutting path of the lower laser head.

8. The stainless steel plate laser cutting method according to claim 1, characterized in that: In S1, the stainless steel plate is placed on a workbench and calibrated and positioned as follows: S11. Place the stainless steel plate on the workbench and fix the plate on the workbench using a plate positioning clamp; S12. Adjust the upper laser head and the lower laser head to be perpendicular to the surface of the stainless steel plate and to the cutting position to complete the calibration and positioning.

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