CN102922129B - Accurate cutting method based on laser identification cutting machine - Google Patents

Abstract

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

Precise cutting method based on laser recognition cutting machine

technical field

The invention relates to a cutting method, in particular to a cutting method using a laser recognition cutting machine.

Background technique

The identification method of the laser identification cutting machine in the prior art is that the identification camera first runs to its physical initial position, then takes a picture of the format, and transmits the image to the numerical control device, which is compared by the numerical control device, and the preset cutting path Calibration, and then the CNC device transmits the calibrated cutting path to the cutting head to complete the cutting action; the recognition camera moves on its track, and completes the second identification, positioning, and cutting. During the entire recognition process, since the recognition camera performs format recognition according to its own set step size, the center of the recognition camera cannot accurately fall on the center of the positioning image, that is, the imaging center is inconsistent with the recognition cutting center . This creates a problem. Since there is a certain distance between the recognition camera itself and the format, the farther the distance from the center of the camera is, the greater the imaging error will be. Then, even if the error calibration is performed on the image, since the imaging center and the recognition cutting center are inconsistent , so the calibrated image still cannot truly reflect the recognized image in the format, and the cutting path formed by the final calibration has a certain gap with the ideal cutting path, which cannot achieve accurate cutting. At the same time, due to the same raw material format Each time, the method of one-by-one comparison was adopted, and a lot of repetitive labor was carried out, so the production efficiency was greatly reduced and the production cost was wasted.

Contents of the invention

Aiming at the problem that the current laser recognition cutting machine cannot accurately form a recognition image, thereby causing inaccurate calibration of the cutting path and affecting the cutting accuracy, the present invention discloses a precise cutting method based on the laser recognition cutting machine. The laser recognition cutting machine includes a cutting 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, and the specific steps are as follows:

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;

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;

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;

In the fourth step, the cutting head completes the cutting according to the calibrated operation vector under the control of the numerical control device.

In the precision cutting method disclosed in the present invention, since the recognition camera moves according to the precise cutting position coordinates in the cutting vector diagram in the numerical control device, the center of the camera can accurately fall on the center of the positioning image, and be in the center The image information is collected according to the position, so as to ensure the consistency of the imaging center and the cutting center, thereby ensuring the accuracy of imaging. At the same time, even if the positioning image is large, there is a certain deviation in the imaging boundary. Since the imaging center and the cutting center are a point, the deviation in each direction is the same, which is easy to correct. Therefore, after adopting the precision cutting method in the present invention, the recognition image in the real image can be reflected, and the operation vector of the calibrated cutting head formed is accurate, thereby achieving the purpose of precise cutting.

At the same time, the present invention further discloses the method of obtaining the cutting vector diagram in the first step. One method is to identify the camera by positioning the image and comparing it with the preset image to form a cutting vector containing the cutting position coordinates and the cutting path vector. map, and transmit this cutting vector diagram to the CNC device. The other is that the computer directly forms the cutting vector diagram including the position coordinates of the cutting head and the operation vector of the cutting head according to the product, and transmits the cutting vector diagram to the numerical control device.

Finally, the present invention further discloses the identification camera positioning method in the second step, including three preferred methods,

The first is to use the head and tail positioning method. Specifically, the recognition camera moves directly 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 compares them with the cutting vector obtained in the first step. The head-to-tail data comparison is performed on the corresponding cutting head position coordinates in the figure, the positioning work is completed, and the deflection information is transmitted to the numerical control device.

The second is to use one by one positioning method. Specifically, the recognition camera moves directly to each coordinate of the cutting position according to the cutting vector diagram of the numerical control device, collects the coordinates of the actual cutting head position and compares them with the cutting vector diagram obtained in the first step. The corresponding cutting head position coordinates are compared one by one to complete the positioning work, and the deflection information is transmitted to the numerical control device.

There is also a method of combining one-by-one positioning with head and tail positioning. Specifically, the recognition camera moves directly to each coordinate of the cutting position according to the cutting vector diagram of the CNC device, collects the actual cutting head position coordinates and compares them with the first step. The corresponding cutting head position coordinates in the obtained cutting vector diagram are compared one by one, the positioning work is completed, and the deflection information is transmitted to the numerical control device, after that, the recognition camera moves 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.

The basis of using the head and tail positioning method alone is to obtain the cutting vector diagram in the first way, because in this way, the cutting vector diagram itself is formed by the identification camera sequentially imaging and calibrating the positioning image in the format, so its The precision is high, and it can be calibrated directly in the way of head and tail positioning in the subsequent cutting process.

For the second one-by-one positioning method, since the accuracy of the entire positioning process is very high, the basis of its application can be the cutting vector diagram obtained in the first way, that is, the method of identifying the camera by positioning the image and comparing it with the preset image , to form a cutting vector diagram containing the cutting position coordinates and cutting path vector; it can also be the cutting vector diagram obtained in the second way, that is, the computer directly forms a cutting vector containing the cutting head position coordinates and the cutting head operation vector according to the product Graph, and transmit this cutting vector diagram to the CNC device.

Of course, for the cutting vector diagram obtained in the second way, after the precise positioning one by one, it can be further combined with the way of head and tail positioning, that is, after the precise positioning and calibration one by one, due to the formation of The cutting vector diagram obtained by the first method has a similar accuracy to the precise cutting vector diagram, so the head-to-tail positioning method can be used for calibration in the subsequent process.

In summary, after adopting the precise cutting method disclosed in the present invention, the problem of inconsistency between the imaging center and the recognition image center is effectively avoided, and the consistency of the imaging center, recognition image center, and cutting center is ensured, thereby improving the cutting path. Calibrate the accuracy to achieve the purpose of precise cutting.

Description of drawings

Fig. 1 is the cutting vector diagram;

Fig. 2 is the width to be cut;

The dotted line part represents the identification track, the circular pattern is the positioning image, and the triangle is the cutting path.

Detailed ways

Embodiment 1 Cutting method of the present invention

Place the raw material on the workbench, turn on the power, and cut according to the following steps:

The first step, as shown in Figure 1, is to identify the camera by positioning the circular pattern of the image and comparing it with the preset image to form a cutting pattern that includes the cutting position coordinates A—N point coordinates and the cutting path vector triangular vector The vector diagram is shown in Figure 2, and the cutting vector diagram is transmitted to the numerical control device;

In the second step, the head and tail positioning method is adopted, and the recognition camera moves directly to the head A and tail N coordinates of the cutting position according to the cutting vector diagram of the CNC device, that is, the actual cutting head position coordinates are collected and compared with the cutting vector obtained in the first step The position coordinates of the corresponding cutting head in the figure are compared with the head and tail data, the positioning work is completed, and the deflection information is transmitted to the numerical control device;

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;

Step 4: Under the control of the numerical control device, the cutting head completes the cutting according to the calibrated operation vector;

Repeat the above four steps to complete the cutting work of the remaining raw materials.

In this way, since the head-to-tail positioning method is adopted, the positioning time of each raw material width is very short, which greatly improves the production efficiency and saves the production cost.

Embodiment 2 traditional cutting method

Place the raw material on the workbench, turn on the power, and cut according to the following steps:

The first step, as shown in Figure 1, is to identify the camera to locate the circular pattern at point A, compare it with the preset image, determine the first triangular cutting path, and perform the cutting.

In the second step, the recognition camera moves according to the preset motion step. Since the usual motion step is X-axis motion, the recognition point is B', and the circular pattern is positioned at B'. Because of this The actual center point at time is B, so there is a deviation in recognition. After comparing with the preset image, the determined second triangular cutting path is offset.

In the third step, the recognition camera moves to point C again, recognizes, cuts, and repeats the recognition-cutting to complete the cutting of the remaining format.

Compared with the method in Example 1, it is obvious that the recognition center shifts, which in turn leads to the cutting shift.

Embodiment 3 Cutting method of the present invention

Place the raw material on the workbench, turn on the power, and cut according to the following steps:

In the first step, the computer directly forms the cutting vector diagram including the position coordinates A-N of the cutting head and the triangular vector of the cutting head operation vector according to the product, as shown in Figure 2, and transmits the cutting vector diagram to the numerical control device;

The second step is to use one by one positioning method to identify the coordinates of the camera moving directly to the cutting position according to the cutting vector diagram of the numerical control device, that is, from each coordinate point of point A to point N, the actual cutting head position coordinates are collected and compared with the first Compare the corresponding cutting head position coordinates in the cutting vector diagram obtained in step one by one, complete the positioning work, and transmit the deflection information to the numerical control device;

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;

Step 4: Under the control of the numerical control device, the cutting head completes the cutting according to the calibrated operation vector;

Repeat the above four steps to complete the cutting work of the remaining raw materials.

Since the method of positioning one by one is adopted, and the recognition point of the recognition camera is located in the center of the recognition image, the purpose of precise positioning is achieved, and the products obtained by cutting are consistent with the preset ideal products.

Embodiment 4 Cutting method of the present invention

Place the raw material on the workbench, turn on the power, and cut according to the following steps:

In the first step, the computer directly forms the cutting vector diagram including the position coordinates A-N of the cutting head and the triangular vector of the cutting head operation vector according to the product, as shown in Figure 2, and transmits the cutting vector diagram to the numerical control device;

The second step is to use the positioning method one by one to identify the camera and move directly to each coordinate of the cutting position according to the cutting vector diagram of the CNC device, that is, to run from point A to point N, collect the actual cutting head position coordinates and compare them with those obtained in the first step The corresponding cutting head position coordinates in the cutting vector diagram are compared one by one to complete the positioning work and transmit the deflection information to the numerical control device. ;

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;

Step 4: Under the control of the numerical control device, the cutting head completes the cutting according to the calibrated operation vector;

At this time, place another raw material on the workbench, and complete the second cutting according to the following steps,

The fifth step, using the head and tail positioning method, the recognition camera moves directly to the head A and tail N coordinates of the cutting position according to the cutting vector diagram of the CNC device, collects the actual cutting head position coordinates and compares them with the cutting vector diagram obtained in the first step The corresponding cutting head position coordinates are compared with the head and tail data, the positioning work is completed, and the deflection information is transmitted to the numerical control device;

In the sixth step, the numerical control device adjusts the operation vector of the cutting head according to the deflection information obtained in the second step;

Step 7: Under the control of the numerical control device, the cutting head completes the cutting according to the calibrated operation vector;

Repeat the five to seven steps to complete the cutting work of the remaining raw materials.

On the basis of one-by-one recognition, a head-to-tail positioning method is added to ensure cutting efficiency while ensuring accuracy.

Embodiment 5 The cutting method of the present invention

Place the raw material on the workbench, turn on the power, and cut according to the following steps:

The first step, as shown in Figure 1, is to identify the camera by positioning the circular pattern of the image and comparing it with the preset image to form a cutting pattern that includes the cutting position coordinates A—N point coordinates and the cutting path vector triangular vector The vector diagram is shown in Figure 2, and the cutting vector diagram is transmitted to the numerical control device;

The second step is to use one by one positioning method to identify the camera and move directly to each coordinate of the cutting position according to the cutting vector diagram of the CNC device, that is, point A to point N, to collect the actual cutting head position coordinates and compare them with the cutting position obtained in the first step. The corresponding cutting head position coordinates in the vector diagram are compared one by one to complete the positioning work, and transmit the deflection information to the numerical control device;

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;

Step 4: Under the control of the numerical control device, the cutting head completes the cutting according to the calibrated operation vector;

Repeat the above four steps to complete the cutting work of the remaining raw materials.

Claims (1)

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: In the first step, the recognition camera forms a cutting vector diagram including cutting position coordinates and cutting path vectors by positioning the image search and comparing with the preset image, and transmits the cutting vector diagram and the position coordinates of the cutting head to the numerical control device; In the second step, the recognition camera moves directly 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 compares them with the corresponding cutting head position coordinates in the cutting vector diagram obtained in the first step. Tail data comparison, complete the positioning work, and transmit the deflection information to the numerical control device; 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; 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. A precise cutting method based on a laser recognition cutting machine, the laser recognition cutting machine includes a cutting head, a recognition camera fixed integrally with the cutting head, and a numerical control device, characterized in that: the precise cutting method is based on precise recognition The cutting method, its specific steps are as follows: In the first step, the recognition camera forms a cutting vector diagram including cutting position coordinates and cutting path vectors by positioning the image search and comparing with the preset image, and transmits the cutting vector diagram and the position coordinates of the cutting head to the numerical control device; In the second step, the recognition camera moves directly to each coordinate of the cutting position according to the cutting vector diagram of the CNC device, collects the actual coordinates of the cutting head position and performs data one by one 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; 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; In the fourth step, the cutting head completes the cutting according to the calibrated operation vector under the control of the numerical control device. 3. A precise cutting method based on a laser recognition cutting machine, the laser recognition cutting machine includes a cutting head, a recognition camera fixed integrally with the cutting head, and a numerical control device, characterized in that: the precise cutting method is based on precise recognition The cutting method, its specific steps are as follows: In the first step, the computer directly forms the cutting vector diagram including the position coordinates of the cutting head and the operation vector of the cutting head according to the product, and transmits the cutting vector diagram to the numerical control device; In the second step, the recognition camera moves directly to each coordinate of the cutting position according to the cutting vector diagram of the CNC device, collects the actual coordinates of the cutting head position and performs data one by one 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; 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; In the fourth step, the cutting head completes the cutting according to the calibrated operation vector under the control of the numerical control device. 4. A precise cutting method based on a laser recognition cutting machine, the laser recognition cutting machine includes a cutting head, a recognition camera fixed integrally with the cutting head, and a numerical control device, characterized in that: the precise cutting method is based on precise recognition The cutting method, its specific steps are as follows: In the first step, the computer directly forms the cutting vector diagram including the position coordinates of the cutting head and the operation vector of the cutting head according to the product, and transmits the cutting vector diagram to the numerical control device; In the second step, the recognition camera moves directly to each coordinate of the cutting position according to the cutting vector diagram of the CNC device, collects the actual coordinates of the cutting head position and performs data one by one 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 CNC 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 compares them with the first step The head-to-tail data comparison is performed on the corresponding cutting head position coordinates in the obtained cutting vector diagram, the positioning work is completed, and the deflection information is transmitted to the numerical control device; 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; In the fourth step, the cutting head completes the cutting according to the calibrated operation vector under the control of the numerical control device.