CN114012247B - Method, device, processor and storage medium for avoiding corner overburning slag hanging defect based on sharp angle process and arc process - Google Patents
Method, device, processor and storage medium for avoiding corner overburning slag hanging defect based on sharp angle process and arc process Download PDFInfo
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- CN114012247B CN114012247B CN202111511758.8A CN202111511758A CN114012247B CN 114012247 B CN114012247 B CN 114012247B CN 202111511758 A CN202111511758 A CN 202111511758A CN 114012247 B CN114012247 B CN 114012247B
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- 238000000034 method Methods 0.000 title claims abstract description 183
- 239000002893 slag Substances 0.000 title claims abstract description 42
- 230000007547 defect Effects 0.000 title claims abstract description 37
- 238000005520 cutting process Methods 0.000 claims abstract description 100
- 238000003698 laser cutting Methods 0.000 claims abstract description 26
- 238000004590 computer program Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0626—Energy control of the laser beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention relates to a method for avoiding corner overburning slag hanging defects based on a sharp angle process and an arc process in a numerical control system, which comprises the following steps: drawing a cutting pattern to generate a cutter path; calculating the sharp angle of each inflection point, and inserting instructions of a sharp angle process; calculating the radius length of each section of arc, and inserting an instruction of an arc process; controlling the laser cutting head to move according to the cutting movement track to start cutting; starting a sharp angle process, and when the sharp angle of the corner and the distance before the corner meet the conditions, emitting light according to the sharp angle process; and (3) starting an arc process, and when the radius of the arc and the starting point position of the arc meet the conditions, emitting light according to the arc process. The method, the device, the processor and the computer readable storage medium thereof for avoiding the defect of excessive burning and slag hanging at the corners based on the sharp angle process and the circular arc process in the numerical control system are adopted, so that the problem that the slag hanging is easy to excessively burn at the corners due to excessive laser power caused by movement deceleration is avoided, the cutting effect at the corners is improved, and the cutting quality requirement is met.
Description
Technical Field
The invention relates to the field of laser cutting, in particular to the field of high-power laser cutting, and in particular relates to a method, a device, a processor and a computer readable storage medium for avoiding corner overburning slag hanging defects based on a sharp corner process and an arc process in a numerical control system.
Background
The laser cutting technology is to control the laser generated by the laser cutting head to move along a certain direction, so as to realize the cutting of the plate and produce the required parts.
In the prior art, the requirements on the moving speed of the cutting head and the setting of the laser power are very accurate when corners such as acute angles or small circular arcs are cut, and the processing quality of a workpiece is very easy to influence. Because the positions of the corners are special, the deceleration treatment is required in the aspect of motion control, and excessive burning slag hanging at the corners is extremely easy to occur when the laser power is too high, so that the workpiece does not meet the quality requirement; and when the laser power is set to be low, the phenomenon of cutting imperviousness is easy to occur at the non-corner, and the rejection rate of the cut workpiece is extremely high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method, a device, a processor and a computer readable storage medium thereof for avoiding the defect of excessive burning and slag hanging of corners based on a sharp corner process and an arc process in a numerical control system which has low rejection rate, high quality, simple and convenient operation and wider application range.
In order to achieve the above object, the method, the device, the processor and the computer readable storage medium thereof for avoiding the defect of corner overburning slag hanging in the numerical control system based on the sharp angle process and the arc process according to the invention are as follows:
the method for avoiding the defect of corner overburning slag hanging based on the sharp angle process and the circular arc process in the numerical control system is mainly characterized by comprising the following steps of:
(1) Drawing a cutting pattern to generate a cutter path;
(2) Judging whether a sharp angle process or an arc process is prepared, if so, continuing the step (3); otherwise, continuing the step (4);
(3) Calculating the sharp angle of each inflection point, inserting instructions of a sharp angle process, and continuing the step (5);
(4) Calculating the radius length of each section of arc, inserting an instruction of an arc process, and continuing the step (5);
(5) Controlling the laser cutting head to move according to the cutting movement track to start cutting;
(6) Judging whether a sharp angle process or an arc process is started, if so, continuing the step (7); otherwise, continuing the step (8);
(7) When the sharp angle of the corner and the distance before the corner meet the conditions, controlling the laser cutting head to emit light according to the sharp angle process, and controlling the laser cutting head to emit light according to the cutting process after the cutting head exits from the corner for movement;
(8) And starting an arc process, and controlling the laser cutting head to emit light according to the arc process when the radius of the arc meets the condition with the starting point position of the arc, and controlling the laser cutting head to emit light according to the cutting process when the cutting head reaches the ending point position of the arc.
Preferably, the step (3) specifically includes the following steps:
(3.1) traversing each point in the graph, for each point P1 (x 1, y 1), determining a front half vector V1 and a rear half vector V2 of the sharp corner from its previous point P2 (x 2, y 2) and its next point P3 (x 3, y 3), respectively, according to the type of the point;
(3.2) calculating the sharp angle of each inflection point;
and (3.3) inserting a sharp angle process instruction into the generated tool path, marking the angle theta of the corner where each point is positioned, and continuing the step (5).
Preferably, the step (4) specifically includes the following steps:
(4.1) traversing each point P1 (x 1, y 1) in the graph;
(4.2) calculating the radius length of the arc through the circle center O1 (x 4, y 4);
and (4.3) inserting an instruction for starting the arc process and an instruction for ending the arc process into the generated tool path, marking the radius R of the arc, and continuing the step (5).
Preferably, the calculating the corner angle of the inflection point in the step (3.2) specifically includes:
the sharp angle of the inflection point is calculated according to the following formula:
θ＝arccos(cosθ)；
v1 is the front half section vector of the sharp angle, and V2 is the rear half section vector of the sharp angle.
Preferably, the angle θ of the corner where each point in the step (3.3) is located includes an angle between a straight line and a straight line, an angle between a straight line and an arc, an angle between an arc and a straight line, and an angle between an arc and an arc.
Preferably, in the step (4.2), the radius length of each arc is calculated, specifically:
the radius length of each arc is calculated according to the following formula:
wherein, the point is P1 (x 1, y 1), and the circle center of the circular arc is O1 (x 4, y 4).
Preferably, the step (7) specifically includes the following steps:
(7.1) judging whether the angle of the next corner of the cut is smaller than or equal to the set sharp angle, if so, continuing the step (7.2); otherwise, continuing the step (7.1);
(7.2) judging whether the position, which is away from the corner and is before reaching the corner, is equal to the position of the sharp angle length, if so, controlling the cutting head to emit light according to the sharp angle process, and executing the peak power, the cutting frequency and the duty ratio of the preset sharp angle process; otherwise, continuing the step (7.2);
(7.3) judging whether the position of the corner, which is far from the corner, is equal to the position of the sharp angle length, if so, controlling the cutting head to emit light according to the cutting process, recovering the peak power, the cutting frequency and the duty ratio used by the cutting process, and ending the step; otherwise, continuing with step (7.3).
Preferably, the step (8) specifically includes the following steps:
(8.1) judging whether the radius of the arc of the lower section of the cut is smaller than or equal to the set radius of the arc, if so, continuing the step (8.2); otherwise, continuing to step (8.1);
(8.2) judging whether the arc starting point position is reached, if so, controlling the cutting head to emit light according to the arc process, and executing the preset peak power, cutting frequency and duty ratio of the arc process; otherwise, continuing the step (8.2);
(8.3) judging whether the arc end position is reached, if so, controlling the cutting head to emit light according to the cutting process, recovering the peak power, the cutting frequency and the duty ratio used by the cutting process, and ending the step; otherwise, the step (8.3) is continued.
The device for avoiding corner overburning slag hanging defects based on a sharp angle process and an arc process in a numerical control system is mainly characterized by comprising the following components:
a processor configured to execute computer-executable instructions;
and the memory stores one or more computer executable instructions, and when the computer executable instructions are executed by the processor, the method for avoiding the defect of corner overburning and slag hanging based on the sharp corner process and the arc process in the numerical control system is realized.
The processor for avoiding corner overburning slag hanging defects based on the sharp angle process and the circular arc process in the numerical control system is mainly characterized in that the processor is configured to execute computer executable instructions, and when the computer executable instructions are executed by the processor, the steps of the method for avoiding corner overburning slag hanging defects based on the sharp angle process and the circular arc process in the numerical control system are realized.
The computer readable storage medium is mainly characterized in that a computer program is stored on the computer readable storage medium, and the computer program can be executed by a processor to realize each step of the method for avoiding the defect of corner overburning and slag hanging based on a sharp angle process and an arc process in the numerical control system.
The method, the device, the processor and the computer readable storage medium thereof for avoiding the defect of excessive burning and slag hanging at the corner in the numerical control system based on the sharp angle process and the circular arc process are adopted, and the peak power, the cutting frequency and the duty ratio of the light emitted by the cutting head can be controlled when the cutting head moves to the corner based on the cutting method of the sharp angle process and the circular arc process, so that the specific parameter values can be accurately adjusted when the cutting head passes the corner, the problem that the laser power is overlarge due to movement deceleration is avoided, the problem that the slag hanging is easy to excessively burn at the corner position is solved, the cutting effect at the corner is improved, and the cutting quality requirement is met.
Drawings
FIG. 1 is a flow chart of a method for avoiding corner overburning slag hanging defects based on a sharp corner process and an arc process in a numerical control system of the invention.
Fig. 2 is a schematic diagram of three points of an embodiment of a method for avoiding corner overburning slag hanging defects based on a sharp angle process and an arc process in a numerical control system according to the present invention.
Fig. 3 is a schematic diagram of a point in front on a straight line and a point behind on a circular arc in an embodiment of a method for avoiding corner overburning slag hanging defects based on a sharp corner process and a circular arc process in a numerical control system of the present invention.
Fig. 4 is a schematic diagram of a point in front of and a point behind a corner over-burning slag-hanging defect on a straight line in an embodiment of a method for avoiding the corner over-burning slag hanging defect based on a sharp corner process and a circular arc process in a numerical control system of the present invention.
Fig. 5 is a schematic diagram of three points on an arc of an embodiment of a method for avoiding corner overburning slag hanging defects based on a sharp corner process and an arc process in a numerical control system of the present invention.
Detailed Description
In order to more clearly describe the technical contents of the present invention, a further description will be made below in connection with specific embodiments.
The method for avoiding the defect of corner overburning slag hanging based on the sharp angle process and the circular arc process in the numerical control system comprises the following steps:
(1) Drawing a cutting pattern to generate a cutter path;
(2) Judging whether a sharp angle process or an arc process is prepared, if so, continuing the step (3); otherwise, continuing the step (4);
(3) Calculating the sharp angle of each inflection point, inserting instructions of a sharp angle process, and continuing the step (5);
(4) Calculating the radius length of each section of arc, inserting an instruction of an arc process, and continuing the step (5);
(5) Controlling the laser cutting head to move according to the cutting movement track to start cutting;
(6) Judging whether a sharp angle process or an arc process is started, if so, continuing the step (7); otherwise, continuing the step (8);
(7) When the sharp angle of the corner and the distance before the corner meet the conditions, controlling the laser cutting head to emit light according to the sharp angle process, and controlling the laser cutting head to emit light according to the cutting process after the cutting head exits from the corner for movement;
(8) And starting an arc process, and controlling the laser cutting head to emit light according to the arc process when the radius of the arc meets the condition with the starting point position of the arc, and controlling the laser cutting head to emit light according to the cutting process when the cutting head reaches the ending point position of the arc.
As a preferred embodiment of the present invention, the step (3) specifically includes the following steps:
(3.1) traversing each point in the graph, for each point P1 (x 1, y 1), determining a front half vector V1 and a rear half vector V2 of the sharp corner from its previous point P2 (x 2, y 2) and its next point P3 (x 3, y 3), respectively, according to the type of the point;
(3.2) calculating the sharp angle of each inflection point;
and (3.3) inserting a sharp angle process instruction into the generated tool path, marking the angle theta of the corner where each point is positioned, and continuing the step (5).
As a preferred embodiment of the present invention, the step (4) specifically includes the following steps:
(4.1) traversing each point P1 (x 1, y 1) in the graph;
(4.2) calculating the radius length of the arc through the circle center O1 (x 4, y 4);
and (4.3) inserting an instruction for starting the arc process and an instruction for ending the arc process into the generated tool path, marking the radius R of the arc, and continuing the step (5).
As a preferred embodiment of the present invention, the step (3.2) calculates the sharp angle of the inflection point, specifically:
the sharp angle of the inflection point is calculated according to the following formula:
θ＝arccos(cosθ)；
v1 is the front half section vector of the sharp angle, and V2 is the rear half section vector of the sharp angle.
As a preferred embodiment of the present invention, the angle θ of the corner where each point in the step (3.3) is located includes an angle between a straight line and a straight line, an angle between a straight line and an arc, an angle between an arc and a straight line, and an angle between an arc and an arc.
As a preferred embodiment of the present invention, in the step (4.2), the radius length of each arc is calculated, specifically:
the radius length of each arc is calculated according to the following formula:
wherein, the point is P1 (x 1, y 1), and the circle center of the circular arc is O1 (x 4, y 4).
As a preferred embodiment of the present invention, the step (7) specifically includes the steps of:
(7.1) judging whether the angle of the next corner of the cut is smaller than or equal to the set sharp angle, if so, continuing the step (7.2); otherwise, continuing the step (7.1);
(7.2) judging whether the distance from the corner to the front of the corner is equal to the length of the sharp corner, if so, controlling the cutting head to emit light according to the sharp corner process, and executing the preset peak power, cutting frequency and duty ratio of the sharp corner process; otherwise, continuing the step (7.2);
(7.3) judging whether the distance from the corner to the corner is equal to the length of the sharp corner, if so, controlling the cutting head to emit light according to the cutting process, recovering the peak power, the cutting frequency and the duty ratio used by the cutting process, and ending the step; otherwise, continuing with step (7.3).
As a preferred embodiment of the present invention, the step (8) specifically includes the steps of:
(8.1) judging whether the radius of the arc of the lower section of the cut is smaller than or equal to the set radius of the arc, if so, continuing the step (8.2); otherwise, continuing to step (8.1);
(8.2) judging whether the arc starting point position is reached, if so, controlling the cutting head to emit light according to the arc process, and executing the peak power, the cutting frequency and the duty ratio of the preset sharp angle process; otherwise, continuing the step (8.2);
(8.3) judging whether the arc end position is reached, if so, controlling the cutting head to emit light according to the cutting process, recovering the peak power, the cutting frequency and the duty ratio used by the cutting process, and ending the step; otherwise, the step (8.3) is continued.
The invention relates to a device for avoiding corner overburning slag hanging defects based on a sharp angle process and an arc process in a numerical control system, which comprises:
a processor configured to execute computer-executable instructions;
and the memory stores one or more computer executable instructions, and when the computer executable instructions are executed by the processor, the method for avoiding the defect of corner overburning and slag hanging based on the sharp corner process and the arc process in the numerical control system is realized.
The processor for avoiding corner overburning slag hanging defects based on the sharp angle process and the circular arc process in the numerical control system is configured to execute computer executable instructions, and when the computer executable instructions are executed by the processor, the steps of the method for avoiding corner overburning slag hanging defects based on the sharp angle process and the circular arc process in the numerical control system are realized.
The computer readable storage medium of the present invention has a computer program stored thereon, the computer program being executable by a processor to implement the steps of the method for avoiding corner overburning and slag hanging defects based on a sharp corner process and a circular arc process in the numerical control system.
The invention aims to provide a cutting method based on a sharp angle process and an arc process, which solves the problem that slag is easy to burn at a corner position and improves the cutting effect at the corner.
According to the invention, the instruction of the sharp angle process is inserted into the tool path through calculating the corner angle, the instruction of the circular arc process is inserted into the tool path through calculating the radius of the circular arc, when the laser cutting head is controlled to process, the peak power, the cutting frequency and the duty ratio of the light emitted by the cutting head are accurately adjusted at the designated position through the sharp angle process and the circular arc process, the problem that the laser power at the corner position is overlarge and excessively burns and hangs slag due to movement deceleration is solved, and the cutting effect at the corner position is improved.
As shown in fig. 1, the invention aims to solve the problem of overburning slag at corners by adjusting specific sharp angles or arcs by setting peak power, cutting frequency and duty ratio at sharp angles or small arcs, and comprises the following specific steps:
(1) When the drawn graph to be cut is converted into a tool path, traversing each point in the graph, and calculating the sharp angle of each inflection point.
The front half segment vector V1 and the rear half segment vector V2 of the sharp corner are determined in the step (1), specifically:
each point in the graph is traversed, and for each point P1 (x 1, y 1), the front half vector V1 and the rear half vector V2 of the sharp corner are determined by its previous point P2 (x 2, y 2) and its next point P3 (x 3, y 3), respectively, according to the type of the point.
If the P1 point is on a straight line, thenIf the point P1 is on a circular arc and the center of the circle is O1 (x 4, y 4), the vector V1 is represented by a tangent to the point on the circular arc, v1= (y 4-y1, x1-x 4) if the circular arc is clockwise, v1= (y 1-y4, x4-x 1) if the circular arc is counterclockwise.
Similarly, if the P3 point is on a straight line, thenIf the point P3 is on an arc and the center of the arc is O2 (x 5, y 5), if the arc is clockwise v2= (y 1-y5, x5-x 1), if the arc is counterclockwise v2= (y 5-y1, x1-x 5).
The inflection point sharp angle is calculated in the step (1), and specifically comprises the following steps:
the angle θ between vector V1 and vector V2 is calculated according to the following formula:
θ＝arccos(cosθ)；
(2) And inserting a sharp angle process instruction into the generated tool path, and marking the angle theta of the corner where each point is positioned, wherein the angle theta comprises an included angle between a straight line and a straight line, an included angle between a straight line and a circular arc, an included angle between a circular arc and a straight line and an included angle between a circular arc and a circular arc.
(3) When the drawn graph to be cut is converted into a tool path, traversing each point P1 in the graph, and calculating the radius length of each section of arc.
The arc radius length is calculated in the step (3), specifically:
traversing each point P1 in the graph, if the point P1 is on the arc, calculating the radius R of the arc through the circle center O1, wherein the specific formula is as follows:
(4) And inserting an instruction for starting the arc process and an instruction for ending the arc process into the generated tool path, and marking the radius R of the arc.
(5) When the sharp angle process is started, setting a desired maximum sharp angle alpha, a sharp angle length beta, peak power, cutting frequency and duty ratio used at the sharp angle, wherein the peak power, the cutting frequency and the duty ratio represent that the sharp angle process is executed from a position beta mm in front of an inflection point to a position beta mm behind the inflection point for all corners with the angle less than or equal to alpha.
(6) When the arc process is started, setting a desired maximum arc radius gamma, peak power, cutting frequency and duty ratio used at the arc, wherein the maximum arc radius gamma is equal to or smaller than the radius gamma, and executing the arc process from the arc starting point until the arc segment is ended.
(7) And (3) starting processing to cut the plate, and controlling the laser cutting head to move according to the cutting movement track.
(8) When the cutting head enters the corner, if the sharp angle process is started and the sharp angle of the next corner meets the requirement of the sharp angle process, when the cutting head moves to a position with the distance inflection point being just equal to the length of the sharp angle, the laser cutting head is controlled to adjust laser, and the preset peak power, cutting frequency and duty ratio of the sharp angle process are started to be executed; when the cutting head exits the corner and moves to a position with a distance from the inflection point being just equal to the length of the sharp corner, the laser cutting head is controlled again to adjust the laser, and the peak power, the cutting frequency and the duty ratio used in the cutting process are recovered.
(9) When the arc process is started and the radius of the next arc meets the requirement of the arc process, when the cutting head moves to the position of the starting point of the arc section, controlling the laser cutting head to adjust laser, and starting to execute the preset peak power, cutting frequency and duty ratio of the arc process; when the cutting head moves to the position of the end point of the arc section, the laser cutting head is controlled again to adjust the laser, and the peak power, the cutting frequency and the duty ratio used in the cutting process are recovered.
In a specific embodiment of the present invention, performing vector calculation specifically includes the steps of:
1. if the points P1, P2, P3 are all on a straight line, as shown in FIG. 2, then
2. If the points P1 and P2 are on a straight line, the point P3 is on an arc and the center of the circle is O2 (x 5, y 5), as shown in FIG. 3, then The tangent of the point P1 on the arc is used to represent the vector V2, v2= (y 1-y5, x5-x 1) if the arc is clockwise, v2= (y 5-y1, x1-x 5) if the arc is counterclockwise;
3. if points P1 and P2 are on an arc and the center of the circle is O1 (x 4, y 4), and point P3 is on a straight line, as shown in fig. 4, a tangent to point P1 on the arc is used to represent vector V1, if the arc is clockwise v1= (y 4-y1, x1-x 4), if the arc is counterclockwise v1= (y 1-y4, x4-x 1),
4. if the points P1, P2, and P3 are all on circular arcs, the centers of the circles are O1 (x 4, y 4) and O2 (x 5, y 5), respectively, as shown in fig. 5. If the first arc is clockwise, v1= (y 4-y1, x1-x 4), if the first arc is counterclockwise, v1= (y 1-y4, x4-x 1), if the second arc is clockwise, v2= (y 1-y5, x5-x 1), if the second arc is counterclockwise, v2= (y 5-y1, x1-x 5).
The specific implementation manner of this embodiment may be referred to the related description in the foregoing embodiment, which is not repeated herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution device. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or part of the steps carried out in the method of the above embodiments may be implemented by a program to instruct related hardware, and the corresponding program may be stored in a computer readable storage medium, where the program when executed includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented as software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The method, the device, the processor and the computer readable storage medium thereof for avoiding the defect of excessive burning and slag hanging at the corner in the numerical control system based on the sharp angle process and the circular arc process are adopted, and the peak power, the cutting frequency and the duty ratio of the light emitted by the cutting head can be controlled when the cutting head moves to the corner based on the cutting method of the sharp angle process and the circular arc process, so that the specific parameter values can be accurately adjusted when the cutting head passes the corner, the problem that the laser power is overlarge due to movement deceleration is avoided, the problem that the slag hanging is easy to excessively burn at the corner position is solved, the cutting effect at the corner is improved, and the cutting quality requirement is met.
In this specification, the invention has been described with reference to specific embodiments thereof. It will be apparent, however, that various modifications and changes may be made without departing from the spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (7)
1. A method for avoiding corner overburning slag hanging defects based on a sharp angle process and an arc process in a numerical control system is characterized by comprising the following steps:
(1) Drawing a cutting pattern to generate a cutter path;
(2) Judging whether a sharp angle process or an arc process is prepared, if so, continuing the step (3); otherwise, continuing the step (4);
(3) Calculating the sharp angle of each inflection point, inserting instructions of a sharp angle process, and continuing the step (5);
(4) Calculating the radius length of each section of arc, inserting an instruction of an arc process, and continuing the step (5);
(5) Controlling the laser cutting head to move according to the cutting movement track to start cutting;
(6) Judging whether a sharp angle process or an arc process is started, if so, continuing the step (7); otherwise, continuing the step (8);
(7) When the sharp angle of the corner and the distance before the corner meet the conditions, controlling the laser cutting head to emit light according to the sharp angle process, and controlling the laser cutting head to emit light according to the cutting process after the cutting head exits from the corner for movement;
(8) Starting an arc process, and controlling the laser cutting head to emit light according to the arc process when the radius of the arc meets the condition with the starting point position of the arc, and controlling the laser cutting head to emit light according to the cutting process when the cutting head reaches the ending point position of the arc;
the step (3) specifically comprises the following steps:
(3.1) traversing each point in the graph, for each point P1 (x 1, y 1), determining a front half vector V1 and a rear half vector V2 of the sharp corner from its previous point P2 (x 2, y 2) and its next point P3 (x 3, y 3), respectively, according to the type of the point;
(3.2) calculating the sharp angle of each inflection point;
(3.3) inserting a sharp angle process instruction into the generated tool path, marking the angle theta of the corner where each point is positioned, and continuing the step (5);
the step (4) specifically comprises the following steps:
(4.1) traversing each point P1 (x 1, y 1) in the graph;
(4.2) calculating the radius length of the arc through the circle center O1 (x 4, y 4);
(4.3) inserting an instruction for starting the arc process and an instruction for ending the arc process into the generated tool path, marking the radius R of the arc, and continuing the step (5);
the sharp angle of the inflection point is calculated in the step (3.2), and the sharp angle is specifically:
the sharp angle of the inflection point is calculated according to the following formula:
θ＝arccos(cosθ)；
wherein V1 is the front half-section vector of the sharp corner, and V2 is the rear half-section vector of the sharp corner;
in the step (4.2), the radius length of each section of arc is calculated, specifically:
the radius length of each arc is calculated according to the following formula:
wherein, the point is P1 (x 1, y 1), and the circle center of the circular arc is O1 (x 4, y 4).
2. The method for avoiding the defect of excessive burning and slag adhering to the corners based on the sharp corner process and the arc process in the numerical control system according to claim 1, wherein the angle θ of the corners where each point is located in the step (3.3) comprises an included angle of a straight line and a straight line, an included angle of a straight line and an arc, an included angle of an arc and a straight line, and an included angle of an arc and an arc.
3. The method for avoiding corner overburning slag hanging defects based on sharp corner technology and arc technology in a numerical control system according to claim 1, wherein the step (7) specifically comprises the following steps:
(7.1) judging whether the angle of the next corner of the cut is smaller than or equal to the set sharp angle, if so, continuing the step (7.2); otherwise, continuing the step (7.1);
(7.2) judging whether the position, which is away from the corner and is before reaching the corner, is equal to the position of the sharp angle length, if so, controlling the cutting head to emit light according to the sharp angle process, and executing the peak power, the cutting frequency and the duty ratio of the preset sharp angle process; otherwise, continuing the step (7.2);
(7.3) judging whether the position of the corner, which is far from the corner, is equal to the position of the sharp angle length, if so, controlling the cutting head to emit light according to the cutting process, recovering the peak power, the cutting frequency and the duty ratio used by the cutting process, and ending the step; otherwise, continuing with step (7.3).
4. The method for avoiding corner overburning slag hanging defects based on sharp corner technology and arc technology in the numerical control system according to claim 1, wherein the step (8) specifically comprises the following steps:
(8.1) judging whether the radius of the arc of the lower section of the cut is smaller than or equal to the set radius of the arc, if so, continuing the step (8.2); otherwise, continuing to step (8.1);
(8.2) judging whether the arc starting point position is reached, if so, controlling the cutting head to emit light according to the arc process, and executing the preset peak power, cutting frequency and duty ratio of the arc process; otherwise, continuing the step (8.2);
(8.3) judging whether the arc end position is reached, if so, controlling the cutting head to emit light according to the cutting process, recovering the peak power, the cutting frequency and the duty ratio used by the cutting process, and ending the step; otherwise, the step (8.3) is continued.
5. A device for avoiding corner overburning slag hanging defects based on a sharp angle process and an arc process in a numerical control system, which is characterized by comprising:
a processor configured to execute computer-executable instructions;
a memory storing one or more computer-executable instructions which, when executed by the processor, perform the steps of the method for avoiding corner overburden and slag attachment defects based on a sharp corner process and a circular arc process in a numerical control system as set forth in any one of claims 1 to 4.
6. A processor for implementing corner overburden slag inclusion defect avoidance based on a sharp corner process and a circular arc process in a numerical control system, wherein the processor is configured to execute computer executable instructions that, when executed by the processor, implement the steps of the method for implementing corner overburden slag inclusion defect avoidance based on a sharp corner process and a circular arc process in a numerical control system as claimed in any one of claims 1 to 4.
7. A computer readable storage medium having stored thereon a computer program executable by a processor to perform the steps of the method of avoiding corner overburden and slag attachment defects based on a sharp corner process and a circular arc process in a numerical control system according to any one of claims 1 to 4.
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