CN112269352B - Cutting machine control system and control method thereof - Google Patents
Cutting machine control system and control method thereof Download PDFInfo
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- CN112269352B CN112269352B CN202011147180.8A CN202011147180A CN112269352B CN 112269352 B CN112269352 B CN 112269352B CN 202011147180 A CN202011147180 A CN 202011147180A CN 112269352 B CN112269352 B CN 112269352B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45136—Turning, lathe
Abstract
The invention discloses a cutting machine control system and a control method thereof, wherein an image capturing unit is used for capturing an image of a cutting die, a computing unit is used for calculating the position of the rotating center of the cutting die on a picture through the displacement of a characteristic reference point according to the known distance of the capturing cutting die of the image capturing unit after rotating the cutting die by a known angle, and the rotating center of the cutting die is used as an original point to describe a set of contour points of the cutting die again to finish correction and obtain the set of contour points of the cutting die correctly so as to improve the accuracy of the size of closely-arranged parts, thereby improving the precision of closely-arranged processing of a cutting machine.
Description
Technical Field
The invention relates to the field of machine tool control, in particular to a control system of a cutting machine, and particularly relates to a control system and a control method thereof aiming at improving the accuracy of the size of a closely-arranged part and improving the closely-arranged processing precision of the cutting machine.
Background
In the field of numerically controlled machine tool machining in the prior art, automatic control is adopted, and after a machining route and a machining amount of a cutting die are set, the cutting die executes a machining process of a part according to a predetermined program, for example, cutting a material.
Under the application situation of the cutting machine, the maximum utilization rate of processing materials can be achieved by matching with close-packed software aiming at various parts, and the close-packed software can swing more parts in limited materials. Thus, when the size of the close-packed parts is incorrect, the close-packed results can be incorrect, resulting in knife biting or excessive waste of material, resulting in excessive scrap during the entire process.
The existing automatic cutting machine can be matched with densely arranged software to improve the utilization rate, and the maximum utilization rate of materials and the maximum number of parts can be achieved only by automatically calculating how to put a cutting die on a processing material for cutting through the software. CAD data for a part, such as AutoCAD DXF (Drawing Exchange Format or Drawing Exchange Format), is commonly used for close packing in most industrial applications.
However, in the case of a cutting machine, the parts are cut by punching the material with a cutting die, but the cutting die may have dimensional errors from the designed DXF due to the manufacturing process and installation, resulting in a typesetting result not matching the actual machining result, and material waste or excessive cutting of the parts may occur.
To solve this problem, the real size of the cutting die needs to be known, and two methods are common at present: the first method is to match with a teaching machine, and manually drag the machine axially to describe the size of the part to be cut by the cutting die. And secondly, matching with a scanner, trying to cut a piece of paper by the cutting die, and enabling the cut residual contour to penetrate through the scanner to obtain the real contour of the cutting die.
The two methods have the defects that in the first method, an additional machine is required to be manufactured to teach the cutting die, and the error is large through manual operation. In the second method, the paper is cut first, the data of the cutting die is obtained through the scanner, and the rotation center of the mechanism for making the cutting die is corrected with the scanner, so that the size of the cutting die is limited by the size of the scanner besides the troublesome process.
Disclosure of Invention
The objective of the present invention is to provide an intelligent cutting machine control system and method that can improve the processing precision, is not limited by the size of the scanner hardware, and considers the error of mechanism installation.
In order to solve the problems, the cutting machine control system comprises an image capturing unit for capturing an image of at least one cutting die arranged on a machine table to obtain the outline of the cutting die and a characteristic reference point. An arithmetic unit captures the profile of the cutting die at two positions after the cutting die moves a known distance and rotates a known angle according to the image capturing unit, the position of the rotating center of the cutting die on the picture is obtained through the characteristic reference point displacement calculation, and the rotating center of the cutting die is used as the original point to describe the profile point set of the cutting die again, finish the correction and correctly obtain the profile point set of the cutting die. When the calculation of the profile points of all the cutting dies is finished, the arithmetic unit utilizes the profile point data of the cutting dies to calculate and typeset to obtain a close arrangement result, and generates a processing file according to the close arrangement result; a control unit for receiving the machining file, and a motor driving unit for receiving the machining file transmitted from the control unit, and sequentially driving the cutting dies to execute corresponding actions according to the machining file.
The control method comprises the steps of installing a cutting die on a machine table, and then capturing an image of the cutting die through the image capturing unit to obtain the contour and the characteristic reference point of the cutting die; and then the operation unit captures the profile of the cutting die at two positions after the cutting die moves a known distance and rotates a known angle according to the image capturing unit, the position of the rotating center of the cutting die on the picture is obtained through the characteristic reference point displacement calculation, the rotating center of the cutting die is used as the origin, the set of the profile points of the cutting die is described again, the correction is completed, and the set of the profile points of the cutting die is obtained correctly. The above-mentioned processes are sequentially performed for all the cutting dies. When the calculation of the contour points of all the cutting dies is completed, the arithmetic unit utilizes the contour point data of the cutting dies to calculate and typeset to obtain the close-packed result, and generates a processing file according to the close-packed result to execute cutting processing.
The invention has the advantages that after one or more cutting dies are arranged, the image after the cutting dies move and rotate is captured by the image capturing device, the data is transmitted to the arithmetic unit, the arithmetic unit calculates the close arrangement result according to the information and transfers the close arrangement result to the processing file, and finally the processing file is processed by the control system.
Therefore, when the cutting die has installation position errors, the position errors can be considered into the close packing result by the operation unit, and the cutting die does not need to be additionally adjusted in the machining process. Compared with the defects of the prior art, the method does not need additional equipment independent of a machine, reduces the manual operation factors and can improve the measurement precision; the technology does not need to additionally manufacture a fixture for fixing paper to ensure the rotation center of the cutting die, and is not limited by the size of scanner hardware, and the size of the cutting die is not limited.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a cutting machine control system of the present disclosure.
Fig. 2 is another schematic diagram of the cutting machine control system according to the present disclosure.
Fig. 3 is a flowchart of a control method of the cutting machine in the present case.
Fig. 4 is a first schematic image diagram of the image capturing unit.
Fig. 5 is a second image schematic diagram of the image capturing unit.
Description of the symbols:
100: cutting machine control system
110: image capturing unit
120: arithmetic unit
130: control unit
200: machine table
210: cutting die
220: material
230: motor drive unit
300: picture frame
310: center origin of picture
400: profile of cutting die
410: characteristic reference point
P1: position of the first reference point
P2: second reference point position
d: distance between two adjacent plates
S10-S70
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by equivalent changes and modifications by one skilled in the art based on the embodiments of the present invention, shall fall within the scope of the present invention.
Please refer to fig. 1, fig. 2, fig. 4 and fig. 5, which are schematic diagrams of an implementation of the cutting machine control system and an image capturing unit of the present disclosure. A cutting machine control system 100 includes an image capturing unit 110 for capturing an image of at least one cutting die 210 mounted on a machine table 200 of a cutting machine, and obtaining a cutting die profile 400 and a feature reference point 410 (shown in FIG. 4) of the cutting die 210 through the image.
An arithmetic unit 120 captures the cutting die profile 400 at two positions of the cutting die 210 after moving a known distance (e.g., distance d in fig. 5) and rotating a known angle (e.g., the cutting die 210 rotates 180 ° as shown in fig. 4 and 5) according to the image capturing unit 110, calculates the position of the cutting die rotation center 420 of the cutting die 110 on the frame 300 (the view range of the image capturing unit 110) through the displacement of the characteristic reference point 410 (in application, the position of the characteristic reference point 410 (P1 and P2) based on the frame center origin 310 can be obtained by the cutting die profile 400 through visual positioning by the image capturing unit 110), and re-describes the set { pt } of the cutting die profile 400 points by using the cutting die rotation center 420 as the origin, thereby completing the calibration and correctly obtaining the set { pt } of the cutting die profile 400 points of the cutting die 210.
In an implementation, the image capturing unit 110 directly captures the cutting die 210 to obtain a complete cutting die image (as shown in fig. 1), and the operation unit 120 calculates to obtain a complete cutting die profile 400 point set { pt } of the cutting die 210. Alternatively, the image capturing unit 110 captures the material 220 (as shown in fig. 2) cut by the cutting die 210 to obtain the complete profile image of the cutting die 210, and the computing unit 120 calculates to obtain the complete cutting die profile 400 point set { pt } of the cutting die 210. The cut material 220 may be paper, wood, polystyrene board, or cloth, leather, fabric ….
In the embodiment of the present application, the image capturing unit 110 sequentially captures images of all the cutting dies 210 (according to the number of the cutting dies 210 required by the processing of the cutting machine 200), and the computing unit 120 performs the calculation and layout on all the cutting dies 210 after the computing unit 120 corrects and correctly obtains the set { pt } of the cutting die outlines 400 of all the cutting dies 210.
When the set { pt } of the 400 points of the profile of the cutting die 210 is calculated, the arithmetic unit 120 performs calculation and layout to obtain a close-packed result by using the data of the set { pt } of the 400 points of the profile of the cutting die, and generates a processing file according to the close-packed result.
After receiving the processing file, a control unit 130 transmits the processing file to a motor driving unit 230 of the cutting machine 200, and the motor driving unit 230 receives the processing file transmitted from the control unit 130, and sequentially drives the cutting die 210 to perform corresponding actions according to the processing file, so as to enable the cutting machine 200 to start processing.
The detailed operation steps of the cutting machine control system 100 of the present invention are as shown in fig. 3, which is a flowchart of the cutting machine control method of the present invention, and the cutting machine control method sequentially includes: step S10, the cutting die 210 is installed on the machine 200, and the machine 200 is installed according to the cutting die 210 required by the machine 200.
In step S20, an image is captured, and the image capturing unit 110 of the cutting machine control system 100 captures an image of the cutting die 210 to obtain the cutting die profile 400 and the feature reference point 410 of the cutting die 210.
In step S30, information of the cutting die profile 400 is obtained through calculation, and in step S20, the two-position cutting die profile 400 of the cutting die 210 that moves a known distance (e.g., distance d in fig. 5) and rotates a known angle (e.g., the cutting die 210 rotates 180 °) is obtained through the calculation unit 120 according to the image capturing unit 110. In an implementation, the image capturing unit 110 directly captures the cutting die 210 to obtain a complete cutting die image (as shown in fig. 1), and the operation unit 120 calculates to obtain a complete cutting die profile 400 point set { pt } of the cutting die 210. Alternatively, the image capturing unit 110 captures the material 220 (as shown in fig. 2) cut by the cutting die 210 to obtain the complete profile image of the cutting die 210, and the computing unit 120 calculates to obtain the complete cutting die profile 400 point set { pt } of the cutting die 210.
The operation unit 120 captures a first image (as shown in fig. 4) of the cutting die 210 at a first time according to the image capturing unit 110, and captures a second image (as shown on the right side of fig. 5) of the cutting die 210 at a second time after the machine 200 moves the cutting die 210 by a known distance d and rotates by a known angle (the rotation angle is 180 degrees as shown in fig. 4 and 5); the arithmetic unit 120 obtains a first reference point position P1 where the feature reference point 410 is located according to the cutting die profile 400 of the first image through image visual positioning, and obtains a second reference point position P2 where the feature reference point 410 is located according to the cutting die profile 400 of the second image through visual positioning, the arithmetic unit 120 obtains the positions of the frames of the first image and the second image of the rotation center 420 of each cutting die 210 according to the relative positions of the first reference point position P1 and the second reference point position P2, and describes the set { pt } of the cutting die profile 400 again with the rotation center of the second image as the origin, thereby completing the correction and correctly obtaining the set { pt } of the cutting die profile 400 of the cutting die 210.
In step S30, after obtaining the information of the cutting die profile 400 through the system image vision, it is known that: 1 the cutting die profile 400 is visually positioned through the image to obtain a first reference point position P1 of the feature reference point 410 of the first image based on the center origin 310 of the screen. 2. The knife profile 400 acquires a set { pt } of the knife profile 400 points based on the center origin 310 of the screen through image vision. 3. After the machine 200 moves the cutting die 210 a known distance d, it is rotated a known angle (the rotation angle is 180 ° as shown in fig. 4 and 5). 4. The cutting die contour 400 is positioned again by using the image vision, and a second reference point position P2 of the feature reference point 410 based on the picture center origin 310 is obtained.
Using the above information, the position of the rotation center 420 of the cutting die 210 on the frame 300 is obtained through calculation, and taking FIG. 5 as an example, the position of the rotation center 420 of the cutting die based on the origin 310 of the frame center at 0 degree is (P1+ P2-d)/2; with the rotation center 420 of the cutting die as the origin, the set { pt } of the cutting die contour 400 points at the positions P1 and P2 of the characteristic reference point 410 are re-described, so that the correction of the cutting die 210 after 0 degree and 180 degrees (taking the rotation angle of the present embodiment as 180 degrees as an example) can be completed, and the set { pt } of the cutting die contour 400 points of the cutting die 210 can be correctly obtained.
Step 40? If yes, the process returns to step S10, and the various cutting dies 210 are sequentially mounted on the cutting machine base 200 according to the various cutting dies 210 required for the processing, and the above-described processes are sequentially performed on all the cutting dies 210 (steps S10 to S30). Or step S40, if the judgment is no, the process goes to step S50.
In step S50, performing the calculation layout to generate a close-packed result, and when the knife model outline 400 point sets { pt } of all knife models 210 are calculated, the operation unit 120 performs the calculation layout to obtain a close-packed result by using the knife model outline 400 point sets { pt } data.
Step S60, converting the result of the close packing into a processing file, and generating a processing file for executing cutting processing according to the close packing result.
Step S70; after the control unit 130 receives the processing file, the control unit 130 transmits the processing file to the motor driving unit 230 of the machine 200, and the motor driving unit 230 receives the processing file transmitted from the control unit 130, and sequentially drives the cutting die 210 to perform corresponding actions according to the processing file, so that the machine 200 of the cutting machine can start processing.
The present invention has the effect that after one or more cutting dies 210 are installed, the image capturing device 110 is used to capture the image after the cutting dies 210 move and rotate, and the data is transmitted to the arithmetic unit 120, the arithmetic unit 120 calculates the encrypted result according to the information and transfers the encrypted result to the processing file, and finally the processing file is processed by the control system. Thus, when the cutting die 210 has an installation position error, the problem of rotation of the cutting die 210 does not need to be considered, and the operation unit 120 considers the position error into the close-packed result, so that additional adjustment of the cutting die 210 in the machining process is not needed, and the precision of close-packed machining is improved. The control system and method of the cutting machine of the present invention can improve the accuracy of the size of the closely-arranged parts, thereby improving the precision of the closely-arranged processing of the cutting machine and also improving the defects of complicated operation flow and difficult system erection of the existing scheme.
However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still within the scope of the present invention.
Claims (10)
1. A cutting machine control system, comprising:
the image capturing unit is used for capturing images of at least one cutting die arranged on the machine table to obtain the outline of the cutting die and a characteristic reference point;
an arithmetic unit, which captures the knife mold profile at two positions after the knife mold moves a known distance and rotates a known angle according to the image capturing unit, obtains the position of the knife mold rotation center of the knife mold on the picture through the characteristic reference point displacement calculation, and describes the knife mold profile point set again by taking the knife mold rotation center as the origin, completes the correction and correctly obtains the knife mold profile point set of the knife mold;
when the calculation of the profile points of all the cutting dies is finished, the arithmetic unit utilizes the profile point data of the cutting dies to calculate and typeset to obtain a close arrangement result, and generates a processing file according to the close arrangement result;
a control unit, which receives the processing file; and
a motor driving unit, which receives the processing file transmitted by the control unit and drives the cutting die to execute corresponding actions according to the processing file.
2. The cutting machine control system according to claim 1, wherein the image capturing unit directly captures the cutting die to obtain a complete cutting die image, and the computing unit computes a complete set of cutting die contour points of the cutting die.
3. The cutting machine control system according to claim 1, wherein the image capturing unit captures the material cut by the cutting die to obtain the complete profile image of the cutting die, and the computing unit computes a complete set of cutting die profile points of the cutting die.
4. The cutting-machine control system of claim 1, wherein the computing unit captures a first image of the cutting-die at a first time according to the capturing unit, and captures a second image of the cutting-die at a second time after the machine stage moves the cutting-die a known distance and rotates a known angle; the operation unit obtains a first reference point position where the characteristic reference point is located according to the cutting die contour of the first image through visual positioning, obtains a second reference point position where the characteristic reference point is located according to the cutting die contour of the second image through visual positioning, calculates and obtains the positions of the rotating centers of the cutting dies in the pictures of the first image and the second image according to the relative positions of the first reference point position and the second reference point position, describes the cutting die contour point set again by taking the rotating center of the cutting die of the second image as the origin, completes correction and correctly obtains the cutting die contour point set of the cutting dies.
5. The cutting machine control system according to claim 1, wherein the image capturing unit sequentially captures images of all the cutting dies, and the computing unit performs calculation and layout on all the cutting dies after the computing unit corrects and correctly obtains the set of the contour points of the cutting dies of all the cutting dies.
6. A cutting machine control method, characterized by comprising:
mounting at least one cutting die on a machine table;
capturing an image of the cutting die through an image capturing unit to obtain the contour of the cutting die and a characteristic reference point;
then, capturing the cutting die profile at two positions after the cutting die moves a known distance and rotates a known angle through an operation unit according to the image capturing unit, calculating the position of the cutting die rotation center of the cutting die on the picture through the characteristic reference point displacement, and re-describing the cutting die profile point set by taking the cutting die rotation center as an original point to finish correction and correctly obtain the cutting die profile point set of the cutting die;
sequentially carrying out the three procedures on all the cutting dies;
when the contour points of all the cutting dies are calculated, the arithmetic unit utilizes the contour point data of the cutting dies to calculate and typeset to obtain a close arrangement result, and generates a processing file according to the close arrangement result to execute cutting processing.
7. The cutting machine control method according to claim 6, wherein the image capturing unit directly captures the cutting die to obtain a complete cutting die image, and the computing unit computes a complete cutting die contour point set of the cutting die.
8. The cutting machine control method according to claim 6, wherein the image capturing unit captures the material cut by the cutting die to obtain the complete profile image of the cutting die, and the computing unit computes a complete set of cutting die profile points of the cutting die.
9. The method of claim 6, wherein the computing unit captures a first image of the cutting die at a first time according to the image capturing unit, and captures a second image of the cutting die at a second time after the machine stage moves the cutting die a known distance and rotates a known angle; the operation unit obtains a first reference point position where the characteristic reference point is located according to the cutting die contour of the first image through visual positioning, obtains a second reference point position where the characteristic reference point is located according to the cutting die contour of the second image through visual positioning, calculates the position of the rotating center of each cutting die of the cutting dies on the pictures in the first image and the second image according to the relative position of the first reference point position and the second reference point position, describes the cutting die contour point set again by taking the rotating center of the cutting die of the second image as the origin, completes correction and obtains the cutting die contour point set of the cutting dies.
10. The method as claimed in claim 6, wherein the processing file is received by a control unit for controlling a motor driving unit to drive the cutting die to perform corresponding operations according to the processing file.
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