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CN102922129A - Accurate cutting method based on laser identification cutting machine - Google Patents

Accurate cutting method based on laser identification cutting machine Download PDF

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CN102922129A
CN102922129A CN2011102258480A CN201110225848A CN102922129A CN 102922129 A CN102922129 A CN 102922129A CN 2011102258480 A CN2011102258480 A CN 2011102258480A CN 201110225848 A CN201110225848 A CN 201110225848A CN 102922129 A CN102922129 A CN 102922129A
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cutting
control device
numerical control
head
position coordinates
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CN102922129B (en
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周大成
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Nanjing Tongfu Light Textile Co Ltd
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Nanjing Tongfu Light Textile Co Ltd
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Abstract

本发明涉及一种切割方法，特别是涉及一种利用激光识别切割机进行切割的方法。针对目前激光识别切割机无法精准形成识别图像，进而引起切割路径校准不精确，影响切割精度的问题，公开了一种基于激光识别切割机的精准切割方法，所述激光识别切割机包括切割头、与切割头固定为一体的识别摄像头、数控装置，所述精准切割方法是以精准识别为基础的切割方法，有效的避免了由于成像中心与识别图像中心不一致的问题，保证了成像中心、识别图像中心、切割中心的一致，从而提高了切割路径校准精度，达到精准切割的目的。

The invention relates to a cutting method, in particular to a cutting method using a laser recognition cutting machine. Aiming at the problem that the current laser recognition cutting machine cannot accurately form a recognition image, which leads to inaccurate calibration of the cutting path and affects the cutting accuracy, a precise cutting method based on a laser recognition cutting machine is disclosed. The laser recognition cutting machine includes a cutting head, A recognition camera and a numerical control device fixed together with the cutting head, the precise cutting method is a cutting method based on precise recognition, which effectively avoids the problem of inconsistency between the imaging center and the recognition image center, and ensures that the imaging center and the recognition image The consistency of the center and the cutting center improves the calibration accuracy of the cutting path and achieves the purpose of precise cutting.

Description

Accurate cutting method based on laser identification cutting machine
Technical field
The present invention relates to a kind of cutting method, particularly relate to a kind of method of utilizing laser identification cutting machine to cut.
 
Background technology
The RM of laser identification cutting machine is in the prior art, identification camera at first moves to its initial physical position, then breadth is taken pictures, and with this image transmitting to numerical control device, compared by numerical control device, and will preset cutting path calibration, then the cutting path of numerical control device after with this calibration transfers to cutting head, finishes cutting action; Identification camera is on its track, and is mobile, and finishes secondary identification, location, cutting.In the middle of whole identifying, because identification camera is to carry out breadth identification according to own 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.So just produced a problem, owing to have certain distance between identification camera itself and the breadth, so more the error of distance imaging is just larger apart from the camera center, so, even image is calibrated for error, because imaging center and identification cutting center are inconsistent, so the image after the calibration still can not react recognition image in the breadth really, also just there is a certain distance in the cutting path that its last calibration forms with desirable cutting path, can not sit on accurate cutting, simultaneously, owing to all adopt the one by one mode of comparison for same raw material breadth at every turn, carry out a large amount of duplication of labour, so reduced to a great extent production efficiency, wasted production cost.
 
Summary of the invention
The present invention is directed to present laser identification cutting machine and can't precisely form recognition image, and then cause cutting path calibration inaccuracy, affect the problem of cutting accuracy, a kind of accurate cutting method based on laser identification cutting machine is disclosed, 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 that precisely is identified as the basis, and its concrete steps are as follows:
The first step is obtained the cutting polar plot that includes 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 the polar plot first motion to cutting position coordinate place according to numerical control device, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out comparing, finish location work, and with the deflection communication to numerical control device;
In the 3rd step, the deflection information that numerical control device obtains according to second step is adjusted cutting head running vector;
In the 4th step, cutting head is finished cutting according to running vector after the calibration under the control of numerical control device.
In accurate cutting method disclosed by the invention, because identification camera is to move according to the precise cutting position coordinates in the cutting polar plot in the numerical control device, so the center of its camera can be dropped on the center of positioning image accurately, and carry out the collection of image information in the center, thereby guaranteed the consistent of imaging center and cutting center, and then guaranteed the accuracy of imaging.Simultaneously, even positioning image is larger, there is certain deviation in the imaging border, because imaging center and cutting center are points, so its deviation on all directions is identical, is easy to revise.Therefore, after the accurate cutting method in the middle of employing the present invention, can react really recognition image in the breadth, the cutting head running vector after the calibration of formation is accurate, and then has reached the purpose of accurate cutting.
Simultaneously, the present invention further discloses the acquisition pattern of the central cutting of first step polar plot, a kind of be identification camera by positioning image seek, the method right with default image ratio, formation includes the cutting polar plot of cutting position coordinate and cutting path vector, and this cutting polar plot is transferred to numerical control device.Another is that computer directly forms the cutting polar plot that includes cutting head position coordinates and cutting head running vector according to product, and this cutting polar plot is transferred to numerical control device.
At last, the present invention also further discloses the identification camera localization method in the middle of the second step, comprises the method for three kinds of comparative optimizations,
The first is to adopt end to end localization method, specifically, identification camera is according to head, the tail coordinate place of numerical control device cutting polar plot first motion to cutting position, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out end to end comparing, finish location work, and with the deflection communication to numerical control device.
The second is to adopt one by one localization method, specifically, identification camera is according to numerical control device cutting polar plot first motion each coordinate place to cutting position, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out one by one comparing, finish location work, and with the deflection communication to numerical control device.
Also having a kind of is to adopt one by one location and the end to end method of positioning combination, specifically, identification camera is according to numerical control device cutting polar plot first motion each coordinate place to cutting position, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out one by one comparing, finish location work, and with the deflection communication to numerical control device, afterwards, identification camera moves to the head of cutting position again according to numerical control device cutting polar plot, the tail coordinate place, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out end to end comparing, finish location work, and with the deflection communication to numerical control device.
Wherein use separately end to end the basis of localization method preferably to adopt first kind of way to obtain the cutting polar plot, because under this mode, itself cutting polar plot is formed positioning image imaging in the breadth, calibration successively by identification camera, so its precision is higher, can after cutting process in, 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, be identification camera by positioning image seek, the method right with default image ratio, form the cutting polar plot that includes cutting position coordinate and cutting path vector; Also can be the cutting polar plot that the second way obtains, namely computer directly forms the cutting polar plot that includes cutting head position coordinates and cutting head running vector according to product, and this cutting polar plot is transferred to numerical control device.
Certainly, cutting polar plot for second way acquisition, behind its precise positioning that at first carried out once locating one by one, can be further combined with the mode of locating end to end, namely by after once calibrate the accurate location of location one by one, owing to formed the accurate cutting polar plot of the cutting polar plot similar accuracy that obtains with first kind of way, thus can after process in adopt the mode of locating end to end, calibrate.
In sum, adopt among the present invention after the disclosed accurate cutting method, effectively avoided because the inconsistent problem of imaging center and recognition image center, guarantee imaging center, recognition image center, cut the consistent of center, thereby improved the cutting path calibration accuracy, reached the purpose of accurate cutting.
Description of drawings
Fig. 1 is the cutting polar plot;
Fig. 2 is breadth to be cut;
Wherein track is identified in the dotted portion representative, and circular pattern is positioning image, and triangle is cutting path.
The specific embodiment
Embodiment 1 cutting method of the present invention
The raw material breadth is placed on above the 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 right with default image ratio, the cutting polar plot that formation includes cutting position coordinate A-N point coordinates and cutting path triangle of vectors vector and transfers to numerical control device with this cutting polar plot as shown in Figure 2;
Second step, adopt end to end localization method, identification camera is according to A, the tail N coordinate place of numerical control device cutting polar plot first motion to cutting position, namely, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out end to end comparing, finish location work, and with the deflection communication to numerical control device;
In the 3rd step, the deflection information that numerical control device obtains according to second step is adjusted cutting head running vector;
In the 4th step, cutting head is finished cutting according to running vector after the calibration under the control of numerical control device;
Repeat above-mentioned four steps, finish the cutting work of surplus stock breadth.
So, because employing is the method for locating end to end, so the positioning time of each raw material breadth is very short, improve greatly production efficiency, saved production cost.
The cutting method that embodiment 2 is traditional
The raw material breadth is placed on above the workbench, and power-on, cut in accordance with the following steps:
The first step, as shown in fig. 1, identification camera the A point carry out circular pattern the location, with default image ratio pair, determine first triangle cutting path, and cut.
Second step, identification camera is according to default motion step-length motion, because the motion that common motion step-length is X axis, so its identification point is B ', and in the location that B ' locates to carry out circular pattern, because the virtual center point position of this moment is B, so identify deviation appears, with default image ratio to rear, skew appears in second triangle cutting path determining.
In the 3rd step, identification camera moves to C point place again, identification, and cutting constantly repeats the cutting that the residue breadth is finished in identification-cutting.
Compare with the method among the embodiment 1, the skew at identification center clearly occurred, and then caused cutting skew to occur.
Embodiment 3 cutting methods of the present invention
The raw material breadth is placed on above the workbench, and power-on, cut in accordance with the following steps:
The first step, computer be according to product, directly form include cutting head position coordinates A-N and cutting head running triangle of vectors vector the cutting polar plot as shown in Figure 2, and this cutting polar plot transferred to numerical control device;
Second step, adopt one by one localization method, identification camera is according to numerical control device cutting polar plot first motion each coordinate to cutting position, each coordinate points of namely ordering from A point-N, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out one by one comparing, finish location work, and with the deflection communication to numerical control device;
In the 3rd step, the deflection information that numerical control device obtains according to second step is adjusted cutting head running vector;
In the 4th step, cutting head is finished cutting according to running vector after the calibration under the control of numerical control device;
Repeat above-mentioned four steps, finish the cutting work of surplus stock breadth.
Because what adopt is the method for locating one by one, the identification camera identification point is positioned at the center of recognition image simultaneously, so realized pinpoint purpose, the product that cutting obtains is consistent with default ideal product.
 
Embodiment 4 cutting methods of the present invention
The raw material breadth is placed on above the workbench, and power-on, cut in accordance with the following steps:
The first step, computer be according to product, directly form include cutting head position coordinates A-N and cutting head running triangle of vectors vector the cutting polar plot as shown in Figure 2, and this cutting polar plot transferred to numerical control device;
Second step, adopt one by one localization method, identification camera is according to numerical control device cutting polar plot first motion each coordinate place to cutting position, namely move to the N point from the A point, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out one by one comparing, finish location work, and with the deflection communication to numerical control device.；
In the 3rd step, the deflection information that numerical control device obtains according to second step is adjusted cutting head running vector;
In the 4th step, cutting head is finished cutting according to running vector after the calibration under the control of numerical control device;
At this moment, another raw material breadth is placed on the workbench, finishes in accordance with the following steps secondary cutting,
The 5th step, adopt end to end localization method, identification camera is according to A, the tail N coordinate place of numerical control device cutting polar plot first motion to cutting position, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out end to end comparing, finish location work, and with the deflection communication to numerical control device;
In the 6th step, the deflection information that numerical control device obtains according to second step is adjusted cutting head running vector;
In the 7th step, cutting head is finished cutting according to running vector after the calibration under the control of numerical control device;
Repeat five to seven steps, finish the cutting work of surplus stock breadth.
On the basis of one by one identification, set up end to end localization method, thereby when guaranteeing precision, guaranteed cutting efficiency.
 
Embodiment 5 cutting methods of the present invention
The raw material breadth is placed on above the 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 right with default image ratio, the cutting polar plot that formation includes cutting position coordinate A-N point coordinates and cutting path triangle of vectors vector and transfers to numerical control device with this cutting polar plot as shown in Figure 2;
Second step, adopt one by one localization method, identification camera is according to numerical control device cutting polar plot first motion each coordinate place to cutting position, be that the A point is to the N point, gather actual cutting head position coordinates and with the first step in corresponding cutting head position coordinates in the cutting polar plot that obtains carry out one by one comparing, finish location work, and with the deflection communication to numerical control device;
In the 3rd step, the deflection information that numerical control device obtains according to second step is adjusted cutting head running vector;
In the 4th step, cutting head is finished cutting according to running vector after the calibration under the control of numerical control device;
Repeat above-mentioned four steps, finish the cutting work of surplus stock breadth.

Claims (6)

1.基于激光识别切割机的精准切割方法，所述激光识别切割机包括切割头、与切割头固定为一体的识别摄像头、数控装置，其特征在于：所述精准切割方法是以精准识别为基础的切割方法，其具体步骤如下： 1. A precise cutting method based on a laser recognition cutting machine, the laser recognition cutting machine includes a cutting head, a recognition camera fixed as one with the cutting head, and a numerical control device, and it is characterized in that: the precise cutting method is based on precise recognition The cutting method, its specific steps are as follows: 第一步，获取包含有切割头位置坐标和切割头运作矢量的切割矢量图，并将此切割矢量图传输至数控装置； The first step is to obtain the cutting vector diagram including the position coordinates of the cutting head and the operation vector of the cutting head, and transmit the cutting vector diagram to the numerical control device; 第二步，识别摄像头按照数控装置切割矢量图直接运动至切割位置坐标处，采集实际切割头位置坐标并与第一步中获得的切割矢量图中的对应切割头位置坐标进行数据比对，完成定位工作，并将偏转信息传输至数控装置； In the second step, the recognition camera moves directly to the cutting position coordinates according to the cutting vector diagram of the CNC device, collects the actual cutting head position coordinates and compares the data with the corresponding cutting head position coordinates in the cutting vector diagram obtained in the first step, and completes Positioning work, and transmit the deflection information to the numerical control device; 第三步，数控装置根据第二步获得的偏转信息，调整切割头运作矢量； In the third step, the numerical control device adjusts the operation vector of the cutting head according to the deflection information obtained in the second step; 第四步，切割头在数控装置的控制下按照校准后运作矢量完成切割。 In the fourth step, the cutting head completes the cutting according to the calibrated operation vector under the control of the numerical control device. 2.如权利要求1所述的精准切割方法，其特征在于：所述第一步中，识别摄像头通过定位图像寻找、与预设图像比对的方法，形成包含有切割位置坐标和切割路径矢量的切割矢量图，并将此切割矢量图传输至数控装置。 2. The precision cutting method according to claim 1, characterized in that: in the first step, the identification camera searches for the positioning image and compares it with the preset image to form a cutting position coordinate and cutting path vector The cutting vector diagram, and transmit this cutting vector diagram to the CNC device. 3.如权利要求1所述的精准切割方法，其特征在于：所述第一步中，电脑根据产品，直接形成包含有切割头位置坐标和切割头运作矢量的切割矢量图，并将此切割矢量图传输至数控装置。 3. The precise cutting method according to claim 1, characterized in that: in the first step, the computer directly forms a cutting vector diagram containing the position coordinates of the cutting head and the operating vector of the cutting head according to the product, and cuts the The vector graphics are transferred to the CNC. 4.如权利要求2所述的精准切割方法，其特征在于：所述第二步中采用头尾定位方法，具体来说，识别摄像头按照数控装置切割矢量图直接运动至切割位置的头、尾坐标处，采集实际切割头位置坐标并与第一步中获得的切割矢量图中的对应切割头位置坐标进行头尾数据比对，完成定位工作，并将偏转信息传输至数控装置。 4. The precise cutting method according to claim 2, characterized in that: the second step adopts the head and tail positioning method, specifically, the recognition camera moves directly to the head and tail of the cutting position according to the cutting vector diagram of the numerical control device coordinates, collect the actual cutting head position coordinates and compare the head and tail data with the corresponding cutting head position coordinates in the cutting vector diagram obtained in the first step, complete the positioning work, and transmit the deflection information to the numerical control device. 5.如权利要求2或3所述的精准切割方法，其特征在于：所述第二步中采用逐个定位方法，具体来说，识别摄像头按照数控装置切割矢量图直接运动至切割位置的每个坐标处，采集实际切割头位置坐标并与第一步中获得的切割矢量图中的对应切割头位置坐标进行逐个数据比对，完成定位工作，并将偏转信息传输至数控装置。 5. The precise cutting method according to claim 2 or 3, characterized in that: in the second step, a positioning method is adopted one by one, specifically, the recognition camera moves directly to each cutting position according to the cutting vector diagram of the numerical control device At the coordinates, the actual cutting head position coordinates are collected and compared with the corresponding cutting head position coordinates in the cutting vector diagram obtained in the first step to complete the positioning work, and the deflection information is transmitted to the numerical control device. 6.如权利要求3所述的精准切割方法，其特征在于：所述第二步中采用逐个定位与头尾定位结合的方法，具体来说，识别摄像头按照数控装置切割矢量图直接运动至切割位置的每个坐标处，采集实际切割头位置坐标并与第一步中获得的切割矢量图中的对应切割头位置坐标进行逐个数据比对，完成定位工作，并将偏转信息传输至数控装置，之后，识别摄像头按照数控装置切割矢量图再运动至切割位置的头、尾坐标处，采集实际切割头位置坐标并与第一步中获得的切割矢量图中的对应切割头位置坐标进行头尾数据比对，完成定位工作，并将偏转信息传输至数控装置。 6. The precision cutting method according to claim 3, characterized in that: in the second step, a method combining one-by-one positioning with head and tail positioning is adopted, specifically, the recognition camera moves directly to the cutting position according to the cutting vector diagram of the numerical control device At each coordinate of the position, the actual cutting head position coordinates are collected and compared with the corresponding cutting head position coordinates in the cutting vector diagram obtained in the first step to complete the positioning work, and the deflection information is transmitted to the numerical control device, After that, the recognition camera moves to the head and tail coordinates of the cutting position according to the cutting vector diagram of the CNC device, collects the actual cutting head position coordinates and performs head and tail data with the corresponding cutting head position coordinates in the cutting vector diagram obtained in the first step Compare, complete the positioning work, and transmit the deflection information to the numerical control device.
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CN107186360A (en) * 2017-06-27 2017-09-22 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 surface trimming method
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
CN110711953A (en) * 2019-10-15 2020-01-21 华工法利莱切焊系统工程有限公司 Laser cutting equipment and laser cutting operation 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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