CN102922129B - Accurate cutting method based on laser identification cutting machine - Google Patents
Accurate cutting method based on laser identification cutting machine Download PDFInfo
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- CN102922129B CN102922129B CN201110225848.0A CN201110225848A CN102922129B CN 102922129 B CN102922129 B CN 102922129B CN 201110225848 A CN201110225848 A CN 201110225848A CN 102922129 B CN102922129 B CN 102922129B
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Abstract
The invention relates to a cutting method, in particular to a method for cutting a vector image by using a laser identification cutting machine, aims to solve problems that a cutting path is not accurately corrected, and the cutting accuracy is influenced because the conventional laser identification cutting machine cannot accurately form an identification image, and discloses an accurate cutting method based on a laser identification cutting machine. The laser identification cutting machine comprises a cutting head, an identification camera fixed with the cutting head to form a whole and a numerical control device. The accurate cutting method is a cutting method based on accurate identification, so that the problem that an imaging center and the center of the identification image are inconsistent is solved, the consistency of the imaging center, the center of the identification image and the cutting center is guaranteed, the cutting path correction accuracy is improved, and an accurate cutting aim is fulfilled.
Description
Technical field
The present invention relates to a kind of cutting method, particularly relate to a kind of laser identification cutting machine that utilizes and carry out the method for cutting.
Background technology
In prior art, the RM of laser identification cutting machine is, first identification camera moves to its initial physical position, then breadth is taken pictures, and by this image transmitting to numerical control device, contrasted by numerical control device, and predetermined cut path is calibrated, then the cutting path after this calibration is transferred to cutting head by numerical control device, completes cutting action; Identification camera is on its track, mobile, and completes secondary identification, location, cutting.In the middle of whole identifying, because identification camera is to carry out breadth identification according to oneself setting step-length own, so the center of positioning image can accurately not dropped in the center of identification camera, namely imaging center is inconsistent with identification cutting center.This creates the terminal a problem, owing to there is certain distance between identification camera itself and breadth, so the error of distance camera center more distance imaging is larger, so, even if calibrate for error to image, because imaging center is inconsistent with identification cutting center, so the image after calibration still can not react recognition image in breadth really, also just there is a certain distance with desirable cutting path in its cutting path that finally calibration is formed, accurate cutting can not be sat on, simultaneously, owing to all adopting the mode of comparison one by one for same raw material breadth at every turn, carry out a large amount of duplication of labour, so reduce production efficiency to a great extent, waste production cost.
Summary of the invention
The present invention is directed to current laser identification cutting machine and precisely cannot form recognition image, and then cause cutting path to calibrate inaccuracy, affect the problem of cutting accuracy, disclose a kind of accurate cutting method based on laser identification cutting machine, identification camera, numerical control device that described laser identification cutting machine comprises cutting head, is fixed as one with cutting head, described accurate cutting method is the cutting method being precisely identified as basis, and its concrete steps are as follows:
The first step, obtains the cutting polar plot including cutting head position coordinates and cutting head running vector, and this cutting polar plot is transferred to numerical control device;
Second step, identification camera cuts polar plot first motion to cutting position coordinate place according to numerical control device, gather actual cutting head position coordinates and carry out comparing with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device.
In accurate cutting method disclosed by the invention, because identification camera carries out movement according to the accurate cutting position coordinate in the cutting polar plot in numerical control device, so the center of its camera can drop on the center of positioning image accurately, and the collection of image information is carried out in center, thus ensure that the consistent of imaging center and cutting center, and then ensure that the accuracy of imaging.Meanwhile, even if positioning image is comparatively large, there is certain deviation in imaging border, because imaging center and cutting center are points, so its deviation is in all directions identical, is easy to revise.Therefore, after adopting the accurate cutting method in the middle of the present invention, can react recognition image in breadth really, the cutting head running vector after the calibration of formation is accurate, and then reaches the object of precisely cutting.
Simultaneously, the present invention further discloses the acquisition pattern of cutting polar plot in the middle of the first step, it is a kind of that to be identification camera found by positioning image, with the method for pre-set image comparison, form the cutting polar plot including cutting position coordinate and cutting path vector, and this cutting polar plot is transferred to numerical control device.Another is that computer, according to product, directly forms the cutting polar plot including cutting head position coordinates and cutting head running vector, and this cutting polar plot is transferred to numerical control device.
Finally, the present invention further discloses the identification camera localization method in the middle of second step, comprises three kinds of ratios more preferably method,
The first adopts localization method end to end, specifically, identification camera according to numerical control device cutting polar plot first motion to the head of cutting position, tail coordinate place, gather actual cutting head position coordinates and carry out comparing end to end with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device.
The second adopts localization method one by one, specifically, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device.
Also having a kind of is the method adopting location and positioning combination end to end one by one, specifically, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device, afterwards, identification camera moves to the head of cutting position again according to numerical control device cutting polar plot, tail coordinate place, gather actual cutting head position coordinates and carry out comparing end to end with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device.
The basis being wherein used alone localization method end to end preferably adopts first kind of way to obtain cutting polar plot, due under this mode, cutting polar plot itself is formed the imaging of breadth inner position image, calibration successively by identification camera, so its precision is higher, can in cutting process afterwards, directly according to the mode of locating end to end, calibrate.
For the second localization method one by one, because the precision of whole position fixing process is very high, so the basis of its application can be the cutting polar plot that first kind of way obtains, namely identification camera found by positioning image, with the method for pre-set image comparison, form the cutting polar plot including cutting position coordinate and cutting path vector; Also can be the cutting polar plot that the second way obtains, namely computer be according to product, directly forms the cutting polar plot including cutting head position coordinates and cutting head running vector, and this cutting polar plot is transferred to numerical control device.
Certainly, for the cutting polar plot that the second way obtains, after first it carried out the precise positioning of once locating one by one, can further combined with the mode of locating end to end, namely after the accurate location by once locating one by one is calibrated, owing to defining the accurate cutting polar plot of the cutting polar plot similar accuracy obtained with first kind of way, so the mode of locating end to end can be adopted in process afterwards, calibrate.
In sum, after adopting accurate cutting method disclosed in the present invention, effectively avoid due to the inconsistent problem of imaging center and recognition image center, ensure that imaging center, recognition image center, cut the consistent of center, thus improve cutting path calibration accuracy, reach the object of precisely cutting.
Accompanying drawing explanation
Fig. 1 is cutting polar plot;
Fig. 2 is breadth to be cut;
Wherein dotted portion representative identifies track, and circular pattern is positioning image, and triangle is cutting path.
Detailed description of the invention
Embodiment 1 cutting method of the present invention
Raw material breadth is placed on above workbench, and power-on, cut in accordance with the following steps:
The first step, as shown in fig. 1, identification camera is by the searching of positioning image circular pattern, the method with pre-set image comparison, formation includes the cutting polar plot of cutting position coordinate A-N point coordinates and cutting path triangle of vectors vector as shown in Figure 2, and this cutting polar plot is transferred to numerical control device;
Second step, adopt localization method end to end, identification camera according to numerical control device cutting polar plot first motion to the head A of cutting position, tail N coordinate place, namely, gather actual cutting head position coordinates and carry out comparing end to end with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device;
Repeat above-mentioned four steps, complete the cutting work of surplus stock breadth.
So, be the method for locating end to end due to what adopt, so the positioning time of each raw material breadth is very short, greatly improves production efficiency, saved production cost.
The cutting method that embodiment 2 is traditional
Raw material breadth is placed on above workbench, and power-on, cut in accordance with the following steps:
The first step, as shown in fig. 1, identification camera A point carry out circular pattern location, with pre-set image comparison, determine first triangle cutting path, and cut.
Second step, identification camera is according to the moving step sizes motion preset, because common moving step sizes is the motion of X axis, so its identification point is B ', and carry out the location of circular pattern at B ' place, because virtual center point position is now B, so deviation appears in identification, after pre-set image comparison, there is skew in second the triangle cutting path determined.
3rd step, identification camera moves to C point place again, identifies, cutting, constantly repeats the cutting of identify-having cut residue breadth.
Compared with the method in embodiment 1, clearly there is the skew identifying center, and then result in cutting appearance skew.
Embodiment 3 cutting method of the present invention
Raw material breadth is placed on above workbench, and power-on, cut in accordance with the following steps:
The first step, computer is according to product, and directly formation includes the cutting polar plot of cutting head position coordinates A-N and cutting head running triangle of vectors vector as shown in Figure 2, and this cutting polar plot is transferred to numerical control device;
Second step, adopt localization method one by one, identification camera cuts each coordinate of polar plot first motion to cutting position according to numerical control device, namely from each coordinate points of A point-N point, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device;
Repeat above-mentioned four steps, complete the cutting work of surplus stock breadth.
Due to employing is the method for locating one by one, and identification camera identification point is positioned at the center of recognition image simultaneously, so achieve pinpoint object, cuts the product obtained consistent with default ideal product.
Embodiment 4 cutting method of the present invention
Raw material breadth is placed on above workbench, and power-on, cut in accordance with the following steps:
The first step, computer is according to product, and directly formation includes the cutting polar plot of cutting head position coordinates A-N and cutting head running triangle of vectors vector as shown in Figure 2, and this cutting polar plot is transferred to numerical control device;
Second step, adopt localization method one by one, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, namely N point is moved to from A point, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device.；
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device;
Now, another raw material breadth is placed on the table, completes secondary cutting in accordance with the following steps,
5th step, adopt localization method end to end, identification camera according to numerical control device cutting polar plot first motion to the head A of cutting position, tail N coordinate place, gather actual cutting head position coordinates and carry out comparing end to end with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
6th step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
7th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device;
Repeat five to seven steps, complete the cutting work of surplus stock breadth.
On the basis identified one by one, set up localization method end to end, thus while guarantee precision, ensure that cutting efficiency.
Embodiment 5 cutting method of the present invention
Raw material breadth is placed on above workbench, and power-on, cut in accordance with the following steps:
The first step, as shown in fig. 1, identification camera is by the searching of positioning image circular pattern, the method with pre-set image comparison, formation includes the cutting polar plot of cutting position coordinate A-N point coordinates and cutting path triangle of vectors vector as shown in Figure 2, and this cutting polar plot is transferred to numerical control device;
Second step, adopt localization method one by one, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, namely A point is to N point, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device;
Repeat above-mentioned four steps, complete the cutting work of surplus stock breadth.
Claims (1)
1. based on the accurate cutting method of laser identification cutting machine, identification camera, numerical control device that described laser identification cutting machine comprises cutting head, is fixed as one with cutting head, it is characterized in that: described accurate cutting method is the cutting method being precisely identified as basis, and its concrete steps are as follows:
The first step, identification camera is found by positioning image, with the method for pre-set image comparison, form the cutting polar plot including cutting position coordinate and cutting path vector, this cutting polar plot and cutting head position coordinates transferred to numerical control device;
Second step, identification camera according to numerical control device cutting polar plot first motion to the head of cutting position, tail coordinate place, gather actual cutting head position coordinates and carry out comparing end to end with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device.
2. based on the accurate cutting method of laser identification cutting machine, identification camera, numerical control device that described laser identification cutting machine comprises cutting head, is fixed as one with cutting head, it is characterized in that: described accurate cutting method is the cutting method being precisely identified as basis, and its concrete steps are as follows:
The first step, identification camera is found by positioning image, with the method for pre-set image comparison, form the cutting polar plot including cutting position coordinate and cutting path vector, this cutting polar plot and cutting head position coordinates transferred to numerical control device;
Second step, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device.
3. based on the accurate cutting method of laser identification cutting machine, identification camera, numerical control device that described laser identification cutting machine comprises cutting head, is fixed as one with cutting head, it is characterized in that: described accurate cutting method is the cutting method being precisely identified as basis, and its concrete steps are as follows:
The first step, computer directly forms the cutting polar plot including cutting head position coordinates and cutting head running vector according to product, and this cutting polar plot is transferred to numerical control device;
Second step, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device;
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device.
4. based on the accurate cutting method of laser identification cutting machine, identification camera, numerical control device that described laser identification cutting machine comprises cutting head, is fixed as one with cutting head, it is characterized in that: described accurate cutting method is the cutting method being precisely identified as basis, and its concrete steps are as follows:
The first step, computer directly forms the cutting polar plot including cutting head position coordinates and cutting head running vector according to product, and this cutting polar plot is transferred to numerical control device;
Second step, identification camera cuts each coordinate place of polar plot first motion to cutting position according to numerical control device, gather actual cutting head position coordinates and carry out comparing one by one with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device, afterwards, identification camera moves to the head of cutting position again according to numerical control device cutting polar plot, tail coordinate place, gather actual cutting head position coordinates and carry out comparing end to end with the corresponding cutting head position coordinates in the cutting polar plot obtained in the first step, complete positioning work, and deflection information is transferred to numerical control device,
3rd step, the deflection information that numerical control device obtains according to second step, adjustment cutting head running vector;
4th step, cutting head completes cutting according to running vector after calibration under the control of numerical control device.
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| CN105057900A (en) * | 2015-08-25 | 2015-11-18 | 深圳市镭煜科技有限公司 | Vector and product target corresponding method |
| CN105081583B (en) * | 2015-08-25 | 2017-10-24 | 深圳市镭煜科技有限公司 | A kind of method for improving Precision of Laser Cutting |
| CN106425115B (en) * | 2016-10-12 | 2019-03-05 | 广东正业科技股份有限公司 | A kind of laser process equipment and its device for detecting laser beam perforation |
| CN106584572A (en) * | 2016-12-27 | 2017-04-26 | 杭州宏华数码科技股份有限公司 | Positional cutting method and system |
| CN107186360B (en) * | 2017-06-27 | 2019-04-23 | 泉州华中科技大学智能制造研究院 | A kind of the winged of view-based access control model identification knits vamp automatic cutting method |
| CN110711953B (en) * | 2019-10-15 | 2022-01-25 | 华工法利莱切焊系统工程有限公司 | Laser cutting equipment and laser cutting operation method |
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