Laser processing system and cutting seam compensation method thereof

Abstract

The present invention discloses a laser processing system and a slit compensation method thereof, the slit compensation method comprising: step A, calling an added slit compensation program segment and testing and debugging, and reinstalling the system after achieving a preset compensation effect; step B, when detecting the breakpoint continuous cutting mode, performing compensation on the corresponding side along the cutting trajectory direction according to the slit compensation program segment, and starting cutting from the starting point of the lead-in line. Only by calling the slit compensation program segment that has been tested and debugged in advance, the primitives can be automatically compensated, and there is no need to re-nest the material in the nesting software every time, which simplifies the compensation operation and can also meet the cutting accuracy requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to a laser processing system and a cutting seam compensation method thereof. Background Art

[0002] The precision requirements for existing laser cutting are getting higher and higher. Although the nesting software at the cutting site can adjust the workpiece precision in real time to achieve compensation, each compensation requires a new nesting generation and generation of a new NC program for the material in the nesting software, which is cumbersome and inefficient.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a laser processing system and a slit compensation method thereof, which automatically compensates the primitives by adding a slit compensation program segment, thereby solving the problem that the nesting software needs to generate a new NC program each time for compensation, resulting in cumbersome compensation operations. In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A cutting seam compensation method for a laser processing system, comprising:

[0006] Step A, calling the added slit compensation program segment and testing and debugging, and reinstalling the system after achieving the preset compensation effect;

[0007] Step B, when the breakpoint continuous cutting mode is activated, compensation is performed on the corresponding side along the cutting trajectory according to the slit compensation program segment, and cutting begins from the starting point of the lead-in line.

[0008] In the slit compensation method of the laser processing system, the step A specifically includes:

[0009] Step A1, saving the numerical control line of the approximation line added at the position of the program header of the breakpoint;

[0010] Step A2, calling the input slit compensation program segment and testing and debugging it, and displaying the compensated trajectory in a two-dimensional window;

[0011] Step A3: When the save button is clicked, the slit compensation program segment is stored as an NC file, the preset compensation effect is recognized, and the system is automatically reinstalled.

[0012] In the slit compensation method of the laser processing system, the step B specifically includes:

[0013] Step B1, when the detection CNC system is turned on, an operation window of the two-dimensional control pops up;

[0014] Step B2, calling the configuration file to configure and set the slit compensation;

[0015] Step B3, load the slit compensation program segment into the CNC system and run it, perform compensation on the corresponding side along the cutting trajectory, and start cutting from the starting point of the lead-in line.

[0016] In the cutting seam compensation method of the laser processing system, in the step B3, when running to code G41, the breakpoint is compensated along the left side of the cutting track direction.

[0017] In the cutting seam compensation method of the laser processing system, in the step B3, when running to code G42, compensation is performed along the right side of the cutting trajectory direction.

[0018] In the slit compensation method of the laser processing system, when compensating on the left or right side, when the button for detecting breakpoint positioning is clicked, the breakpoint is surrounded by a frame, and the length of the approximate line segment set in the configuration file is obtained and displayed in the operation window.

[0019] In the slit compensation method of the laser processing system, during the left or right compensation process, it is detected in real time whether the position of the breakpoint is at the position of the lead-in line, and if so, cutting is started from the starting point of the lead-in line.

[0020] A laser processing system for implementing the slit compensation method, comprising: a numerical control processing device and a controller;

[0021] The controller calls the added slit compensation program segment and performs testing and debugging, and reinstalls the system after achieving the preset compensation effect; when the breakpoint continuous cutting mode is detected, compensation is performed on the corresponding side along the cutting trajectory direction according to the slit compensation program segment, and the CNC machining equipment is controlled to start cutting from the starting point of the lead-in line.

[0022] In a laser processing system and a slit compensation method provided by the present invention, an added slit compensation program segment is called and tested and debugged, and the system is reinstalled after the preset compensation effect is achieved; when the breakpoint continuous cutting mode is detected, compensation is performed on the corresponding side along the cutting trajectory direction according to the slit compensation program segment, and cutting is started from the starting point of the lead-in line. Only by calling the slit compensation program segment that has been tested and debugged in advance, the primitives can be automatically compensated, and there is no need to re-nest the material in the nesting software every time, which simplifies the compensation operation and meets the cutting accuracy requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flow chart of a slit compensation method for a laser processing system provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a compensated trajectory provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of adding an ID number to a control provided in an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of an operation window of a two-dimensional control provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a preview trajectory of loading a slit compensation program segment into a CNC system provided by an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of left-side compensation provided by an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of an operation window for breakpoint connection provided by an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of an approximation line segment for left-side compensation provided by an embodiment of the present invention;

[0031] Fig. 9 A schematic diagram of right-side compensation provided by an embodiment of the present invention;

[0032] Fig.10 A schematic diagram of an approximation line segment for right-side compensation provided by an embodiment of the present invention;

[0033] Fig.11 A schematic diagram of the starting point of the lead-in line provided in an embodiment of the present invention;

[0034] Fig.12 A schematic diagram of cutting from the starting point of the lead-in line provided in an embodiment of the present invention;

[0035] Fig.13 This is a structural block diagram of a laser processing system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In view of the problem that the existing nesting software needs to generate a new NC program each time for compensation, resulting in cumbersome compensation operations and low efficiency, the purpose of the present invention is to provide a laser processing system and a slit compensation method thereof, which performs compensation for each primitive in the NC code once, and does not need to convert and compensate from the nesting software each time, but automatically compensates the primitives, thereby realizing automatic slit compensation and achieving the requirements of high-precision cutting. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] See also Figure 1, which is a flow chart of the intelligent woodworking processing method provided by an embodiment of the present invention. Figure 1 As shown, the intelligent woodworking processing method comprises the following steps:

[0038] S10, calling the added slit compensation program segment and performing testing and debugging, and reinstalling the system after achieving the preset compensation effect;

[0039] S20, when the breakpoint continuous cutting mode is activated, compensation is performed on the corresponding side along the cutting trajectory according to the slit compensation program segment, and cutting starts from the starting point of the lead-in line.

[0040] According to the principle of tool compensation, the tool compensation function of G code can be effective in the laser industry. You only need to call the pre-tested and debugged kerf compensation program segment, and compensate each primitive once in the kerf compensation program segment (a section of NC code), and the compensation of the primitive can be automatically completed. Figure 2 As shown, the CNC (Computer numerical control, computer numerical control machine tool, referred to as CNC machine tool) system will perform tool path left compensation / tool ​​path right compensation according to G41 / G42. When G41 / G42 is activated, the CNC system will perform tool path left compensation / tool ​​path right compensation for each primitive. Figure 2 The solid line is the trajectory after compensation, the long dashed line is the trajectory before compensation, and the arrow indicates the processing direction. After that, when encountering G40 or reset, the compensation is turned off.

[0041] There is no need to re-nest the material in the nesting software every time, which simplifies the compensation operation and meets the cutting accuracy requirements.

[0042] In this embodiment, the step S10 specifically includes:

[0043] Step 110, save the numerical control line of the approximation line added at the position of the program header of the breakpoint.

[0044] This embodiment uses the VS2010 software platform to modify the code of the two-dimensional display software currently used by the customer. First, a section of NC (Numerical Control) lines for the approximation line is added to the program header of the breakpoint, such as the program line in the new NC code format shown below: N270 G01 Y20 F5000 (leadinlength), which is used to inform the CNC (Computer Numerical Control) software that the current interpolation code is the approximation line close to the breakpoint position, so as to ensure the compensation effect at the breakpoint position.

[0045] Step 120 , calling the input slit compensation program segment and performing testing and debugging, and displaying the compensated trajectory in a two-dimensional window.

[0046] The programmer inputs the slit compensation program segment, edits the NC code shown below and tests it to make it run normally on the CNC system; during the operation, the compensated trajectory can be displayed in two dimensions. The new NC code format is as follows:

[0047] N210 G90

[0048] N220 G51 RO

[0049] N230 G54

[0050] N240 G00 X70 Y25

[0051] N250 G41 D1 (left compensation / anticlockwise)

[0052] N260 (CAM ON-MEDIUM)

[0053] N265 (LASER ON)

[0054] N270 G01 Y20 F5000 (leadin length)

[0055] N280 G01 X120

[0056] N290 G01 Y120

[0057] N300 G01 X20

[0058] N310 G01 Y20

[0059] N320 G01 X70

[0060] N330 G01 X75 (leadout length)

[0061] N340 G40 (compensation Off)

[0062] N350 (LASER OFE)

[0063] N360 G00 X135 Y15

[0064] N370 G41 D1 (left compensation / anticlockwise)

[0065] N380 (CAM ON-MEDIUM)

[0066] N385 (LASER ON)

[0067] N390 G03 X135 Y10 I0 J-2.5 F5000(leadin length)

[0068] N400 G03 I0 J10

[0069] N410 G03 X135 Y15 I0 J2.5(leadout length)

[0070] N420 G40 (compensation Off)

[0071] N430 G00 X160 Y20

[0072] N440 G42 D1 (right compensation / anticlockwise)

[0073] N450 (CAM ON-MEDIUM)

[0074] N455 (LASER ON)

[0075] N460 G01 X165 F5000 (leadin length)

[0076] N470 G01 X265

[0077] N480 G01 Y120

[0078] N490 G01 X165

[0079] N500 G01 Y20

[0080] N510 G01 Y15 (leadout length)

[0081] N520 G40 (compensation Off)

[0082] N530 G00 X290 Y5

[0083] N540 G42 D1 (right compensation / anticlockwise)

[0084] N550 (CAM ON-MEDIUM)

[0085] N555 (LASER ON)

[0086] N560 G02 X290 Y10 I0 J2.5 F5000 (leadin length)

[0087] N570 G03 I0 J10

[0088] N580 G02 X290 Y5 I0 J-2.5(leadout length)

[0089] N590 G40 (compensation Off)

[0090] N600 G00 X0 Y0

[0091] N610 M30

[0092] In NC code, G41 D1 indicates left compensation or counterclockwise, and G42 D1 indicates right compensation or counterclockwise. G01Y20 F5000, G03 X135 Y10 I0 J-2.5 F500, G01 X165 F5000, G02 X290 Y5 I0 J2.5 F5000 all indicate lead-in lines, where X and Y indicate the coordinate values ​​of the lead-in lines, I0 is XX, J2.5 is XX, and F5000 is XX). G01 X75, G03X135 Y15 I0 J-2.5, G01 Y20, G02 X290 Y5 I0 J-2.5 all indicate lead-out lines. NC code has certain format requirements, for example, left / right compensation (for compensation activation), lead-in, and lead-out are required codes. Since path compensation modifies the path programmed in the active plane, path compensation cannot be performed in G92 and G74. That is, G92 (used to set axis values, allowing the current machining point to be assigned new coordinate values) cannot be used to perform path correction during path compensation. During the execution of G74 (programmable return to the machine origin), G41 or G42 cannot be activated at the same time.

[0093] Step 130 , when detecting that the save button is clicked, the slit compensation program segment is stored as an NC file, identifying that the preset compensation effect is currently achieved, and automatically reinstalling the system.

[0094] Finally, according to the usage and function of tool compensation, the kerf compensation program segment is tested and debugged; by loading the kerf compensation program, the machining graphics of the kerf compensation program will be displayed in the two-dimensional window; then by clicking the program start button on the console, a program start execution signal is sent to the CNC system, and the program starts to execute. The real-time path of each line of code of the kerf compensation program will be displayed in the two-dimensional window. View the trajectory display after compensation in the two-dimensional window, such as Figure 2 As shown in the figure, when the compensation value is set to D1=1mm, the compensation will be determined according to the direction of the current processing trajectory. G41 indicates compensation on the left side along the processing direction; G42 indicates compensation on the right side along the processing direction. After the user determines that the trajectory is correct, it can be saved and the slit compensation program segment is stored as an NC file. When the system detects that the save button is clicked, it recognizes that the preset compensation effect is currently achieved and automatically reinstalls the system.

[0095] The step S20 specifically includes:

[0096] Step 210: When the CNC system is turned on, a two-dimensional control operation window pops up.

[0097] After reinstalling the system, open the CNC interface of the CNC system. If it is the initial version of the interface, you need to open the corresponding .xml file and add the ID (IDentity, identity number) of the control so that it can be displayed. Figure 3 As shown, the control ID name is clsid, and the ID number is 135CBFBD-E8E6-4906-8ECE-42044E9BC22F. If the CNC interface is a new interface and needs to use a two-dimensional display control, when the CNC system is opened directly, the new interface will be associated and opened at the same time, and the operation window of the current two-dimensional control can be displayed. Take the high-power new interface as an example. Figure 4 As shown, the 2D control has been registered and is running successfully.

[0098] Step 220: Call the configuration file to configure the slit compensation.

[0099] This embodiment mainly uses the seam compensation. The seam compensation program segment combines the two-dimensional control to perform the breakpoint connection operation, and the two-dimensional preview is used to determine whether the breakpoint position and function are normal. Therefore, before calling the seam compensation program segment, first call the configuration file to configure the seam compensation. The configuration file can be opened from the following path: C:\PACnc\DBHMI\cfg\2D_cfg.ini, find the seam compensation configuration part, as shown below, and set the parameters therein:

[0100] [RadiusCompensation] Gap compensation setting group

[0101] toolNumber=.D001 / / Default offset radius variable, this variable must be referenced in the PLC.

[0102] isActive=1 / / !=0 means activating the kerf compensation function.

[0103] closeLength=10 / / Approximation line length. If it is an arc, it is expressed as arc length.

[0104] isApproachCutting=0 / / Whether the approach line is cut, the default value is 0 for cutting

[0105] Step 230, loading the slit compensation program segment into the CNC system and running it, performing compensation on the corresponding side along the cutting trajectory direction, and starting cutting from the starting point of the lead-in line.

[0106] Then load the slit compensation program segment (which has been stored as an NC file, as shown below) into the CNC system, and the two-dimensional preview trajectory is as follows: Figure 5 shown.

[0107] %

[0108] P100

[0109] N200 G71

[0110] N210 G90

[0111] N220 G51 R=P009

[0112] N230 G54

[0113] N240 G00 X70 Y25

[0114] N250 G41 D1

[0115] N265 Q=P23

[0116] N270 G01 Y20 F1000 (leadin length)

[0117] N280 G01 X120

[0118] N290 G01 Y120

[0119] N300 G01 X20

[0120] N310 G01 Y20

[0121] N320 G01 X70

[0122] N330 G01 X75 (leadout length)

[0123] N340 G40 N350 (LASER OFE)

[0124] N350 Q=P24

[0125] N360 G00 X135 Y15

[0126] N370 G41 D1

[0127] N385 Q=P25

[0128] N390 G03 X135 Y10 I0 J-2.5 (leadin length)

[0129] N400 G03 I0 J10

[0130] N410 G03 X135 Y15 I0 J2.5(leadout length)

[0131] N420 G40

[0132] N425 Q=P26

[0133] N430 G00 X160 Y20

[0134] N440 G42 D1

[0135] N455 Q=P27

[0136] N460 G01 X165 (leadin length)

[0137] N470 G01 X265

[0138] N480 G01 Y120

[0139] N490 G01 X165

[0140] N500 G01 Y20

[0141] N510 G01 Y15 (leadout length)

[0142] N520 G40

[0143] N525 Q=P28

[0144] N530 G00 X290 Y5

[0145] N540 G42 D1

[0146] N555 Q=P23

[0147] N560 G02 X290 Y10 I0 J2.5 (leadin length)

[0148] N570 G03 I0 J10

[0149] N580 G02 X290 Y5 I0 J-2.5(leadout length)

[0150] N590 G40

[0151] N600 G00 X0 Y0

[0152] N610 M30

[0153] It is important to understand that the starting line number of the NC program cannot be less than 200, that is, N200.

[0154] The traces of different layers will display different colors. Figure 5 In the figure, r represents the displayed red, y represents the displayed yellow, and g represents the displayed green.

[0155] At this time, if the machine tool or CNC system is in the state of machine tool preparation, the user can select the test mode for simulation operation to detect Figure 4 When the XX button in the operation window is clicked, the CNC system enters the test mode and displays the status of the simulation in the operation window: the D1 value is 1 and the tool wear offset is 0. When the D1 value is set to 1, Figure 6 It can be seen that the inner path is the G41 left compensation path, and the trajectory is offset from the actual trajectory. The offset G code G41 indicates compensation to the left along the trajectory running direction, and the offset G code G42 indicates compensation to the right along the trajectory running direction.

[0156] When running to code G41, if Figure 6 As shown, the breakpoint BP is compensated along the left side of the cutting track. If the breakpoint BP is at this position, and there is a sudden power failure or an alarm, it is necessary to use the breakpoint knife to continue cutting, otherwise the material will be scrapped.

[0157] like Figure 7 As shown in the figure, the operation of breakpoint connection includes: clicking the reset button on the console to give the CNC system a reset signal to reset. After resetting, when the button on the right to click the breakpoint positioning is clicked, first locate the position of the previous breakpoint, such as Figure 7As shown, the breakpoint is surrounded by a box. In the configuration file, set the length of the approaching line segment to: closeLength = 10. Then the CNC system obtains the length of the approaching line segment and displays it in the operation window, as shown in the following figure. Figure 8 The existence of the approximation line segment is to show that when the breakpoint is reached, the cutting speed and acceleration can reach the size before the breakpoint, and the approximation line segment is necessary.

[0158] When running to code G42, the right side compensation along the cutting path direction, the breakpoint BP position is as follows Fig. 9 As shown, the position of the approximate line segment is Fig.10 shown.

[0159] If the position of the breakpoint BP is exactly at the position of the starting lead-in line (the NC line containing the leadin length), when the breakpoint function is executed, the breakpoint starting point will automatically default to the starting point (the pointed part) of the lead-in line LI for cutting. Fig.11 shown.

[0160] After executing the continuous cutting procedure, start cutting from the starting point of the lead-in wire, such as Fig.12 As shown, the thick line frame below is the introduction line.

[0161] It should be understood that after activating the offset processing function of G41 or G42, the breakpoint function will not start cutting directly from the breakpoint position as originally set. The starting cutting position will reversely calculate the length of an approximation line segment from the opposite direction of the current trajectory direction. After obtaining the position of the starting point of the approximation line, cutting will start from the starting point of the approximation line. The approximation line can be processed with or without light, which is determined by the CAM end or customer demand. By default, light cutting is performed. The approximation line can be considered as the lead-in line of the primitive, and general lead-in lines are cut. This embodiment takes a straight line as an example. The processing method of arcs or oblique lines is the same as that of straight lines, which will not be described in detail here.

[0162] Based on the above-mentioned slit compensation method, the embodiment of the present invention further provides a laser processing system for the slit compensation method, see Fig.13 The laser processing system includes: a CNC processing device 10 and a controller 20 (a desktop computer or a laptop computer can be used); the controller 20 calls the added slit compensation program segment and performs testing and debugging, and reinstalls the system after achieving the preset compensation effect; when the breakpoint continuous cutting mode is detected, the controller 20 compensates the corresponding side along the cutting trajectory direction according to the slit compensation program segment, and controls the CNC processing device 10 to start cutting from the starting point of the lead-in line.

[0163] In summary, the laser processing system and the cutting seam compensation method provided by the present invention add a cutting seam compensation program segment on the basis of the existing CNC system, call the cutting seam compensation program segment that has been tested and debugged in advance, and compensate each graphic element once in the cutting seam compensation program segment (a segment of NC code). Therefore, there is no need to convert and compensate from the nesting software every time, but the graphic elements are automatically compensated, thereby realizing automatic cutting seam compensation and meeting the requirements of high-precision cutting.

[0164] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the program can be stored in a computer-readable storage medium, and the program can include the processes of the above-mentioned method embodiments when executed. The storage medium can be a memory, a disk, an optical disk, etc.

[0165] The division of the above functional modules is only for illustration. In practical applications, the above functions can be assigned to different functional modules as needed, that is, divided into different functional modules to complete all or part of the functions described above.

[0166] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A cutting seam compensation method for a laser processing system, characterized in that: include: Step A, calling the added slit compensation program segment and testing and debugging, and reinstalling the system after achieving the preset compensation effect; Step B: When the breakpoint detection and continuous cutting mode is started, compensation is performed on the corresponding side along the cutting trajectory according to the slit compensation program segment, and cutting starts from the starting point of the lead-in line; The step A specifically comprises: Step A1, adding a numerical control line of the approach line at the position of the program header of the breakpoint; Step A2, calling the input slit compensation program segment and testing and debugging it, and displaying the compensated trajectory in a two-dimensional window; Step A3, when the save button is clicked, the slit compensation program segment is stored as an NC file, the preset compensation effect is recognized, and the system is automatically reinstalled; The step B specifically comprises: Step B1, when the detection CNC system is turned on, an operation window of the two-dimensional control pops up; Step B2, calling the configuration file to configure and set the slit compensation; Step B3, load the slit compensation program segment into the CNC system and run it, perform compensation on the corresponding side along the cutting trajectory, and start cutting from the starting point of the lead-in line.

2. The slit compensation method of the laser processing system according to claim 1, characterized in that: In step B3, when running to code G41, the breakpoint is compensated along the left side of the cutting trajectory direction.

3. The slit compensation method of a laser processing system according to claim 1, characterized in that: In step B3, when running to code G42, compensation is performed on the right side along the cutting path direction.

4. The cutting seam compensation method of the laser processing system according to claim 3, characterized in that: When the button for detecting the breakpoint positioning is clicked during left or right compensation, the breakpoint is surrounded by a frame, the length of the approximation line segment set in the configuration file is obtained and displayed in the operation window.

5. The slit compensation method of the laser processing system according to claim 3, characterized in that: During the left or right compensation process, it is detected in real time whether the position of the breakpoint is at the position of the lead-in line. If so, cutting is started from the starting point of the lead-in line.

6. A laser processing system for implementing the slit compensation method according to claim 1, characterized in that: include: CNC machining equipment and controllers; The controller calls the added slit compensation program segment and performs testing and debugging, and reinstalls the system after achieving the preset compensation effect; When the breakpoint detection and continuous cutting mode is started, compensation is performed on the corresponding side along the cutting trajectory according to the slit compensation program segment, and the CNC machining equipment is controlled to start cutting from the starting point of the lead-in line.

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