CN116238155A - 3D printing part partition control device and method utilizing scanning time - Google Patents

Abstract

The present invention relates to the technical field of 3D printing multi-vibrating mirror and multi-laser control technology, in particular to a 3D printing part partition control device and method using scanning time. The control device includes an upper laser, a lower laser, an upper scanning The galvanometer and the lower scanning galvanometer, the upper scanning galvanometer is connected to the upper laser, the lower scanning galvanometer is connected to the lower laser, the upper computer includes a laser control module, a scanning galvanometer control module, a transport control module, a file analysis module, and a partition control modules and execution modules. The invention can divide the printing tasks of the two lasers equally to the greatest extent, reduce the printing time of the same data, and improve the printing efficiency.

Description

A 3D printing part partition control device and method using scanning time

technical field

The invention relates to the technical field of 3D printing multi-vibrating mirror and multi-laser control technology, in particular to a 3D printing part partition control device and method using scanning time.

Background technique

3D printing is to use the results of CAD three-dimensional design and the method of layer-by-layer accumulation to manufacture parts. It adopts a method that is completely opposite to traditional subtractive manufacturing technology. Through software layered discrete and numerical control forming systems, metal Powder, photosensitive resin, plastic, wax and other special materials are piled up and bonded layer by layer, and finally superimposed to form a three-dimensional physical model that is completely consistent with the corresponding digital model.

Multi-laser collaborative work has the characteristics of faster printing speed and shorter printing time than single laser work, and is widely used in the processing of large-size parts or the denture industry that requires high timeliness. Due to the limitation of the coverage of the optical path when multi-laser prints some parts, a complete part is divided into multiple parts, which are processed by two different lasers. When multi-laser tasks are assigned, due to the The uncertainty of placement results in more data in a certain area and less data in a certain area. This means that one laser scans more tasks and one laser scans less. In this case, not only the printing time will be reduced, but also two The working hours of different lasers are inconsistent. After a certain period of time, the power of one laser has been attenuated a lot, while the other laser is still running normally, and there is a difference in service life. Using the traditional partitioning by part bounding box and part quantity, it is still difficult to equally divide the work tasks of two lasers. When printing the same data, one laser is always waiting for the other laser to scan, resulting in a waste of time.

To solve the above problems, solutions can be conceived from various aspects and angles. For example, adjusting the placement of parts and evenly distributing the number of parts placed on the substrate can not solve the problem of equal distribution of scanning tasks from the root cause.

Contents of the invention

The invention provides a 3D printing part partition control device and method using scanning time, which solves the problem of uneven task distribution during multi-laser printing.

In order to achieve the purpose of the present invention, the adopted technical solution is: a 3D printing part partition control device using scanning time, the control device includes an upper laser, a lower laser, an upper scanning galvanometer and a lower laser all connected to the host computer. Scanning vibrating mirror, the upper scanning vibrating mirror is connected with the upper laser, and the lower scanning vibrating mirror is connected with the lower laser,

The upper computer includes: a laser control module, a scanning galvanometer control module, a motion control control module, a file analysis module, a partition control module and an execution module;

The laser control module is used to control the amount of energy emitted by the laser and control the switch of the laser;

The scanning galvanometer control module drives the energy of the laser beam to a designated position according to the two-dimensional image of the part to be printed;

The motion control module, according to the laser control module and the scanning galvanometer control module, cooperates with the mechanical movement to finally realize the part printing;

The file analysis module is used to analyze the data format of the parts to be printed;

The partition control module is used to divide the belonging area of the part; judge the Y minimum value, the Y maximum value and the positional relationship in the Y direction of the boundary line of the two splicing areas in the bounding box information of each part that needs to be printed, and determine each The printed part belongs to A area, B area, AB public area or three areas;

The execution module separately controls the upper laser, the lower laser, the upper scanning vibrating mirror and the lower scanning vibrating mirror to work together according to the data obtained by the partition control module.

As an optimization scheme of the present invention, the file parsing module is used to parse out the bounding box information of each part, and the bounding box information includes: the abscissa X minimum value Xmin, the X maximum value Xmax of the part, the ordinate Y minimum value Ymin and The maximum Y value Ymax, and the Z minimum value Zmin and the Z maximum value Zmax data in the Z axis direction of the part.

As an optimization scheme of the present invention, the ordinates of the boundary lines of the two splicing areas are -Y and Y respectively, the ordinate Y and the upper area are the upper laser printing range, which is the A area; the coordinates -Y and the lower area are the lower laser printing The range is the B area; the area included from the ordinate -Y to the ordinate Y is the overlapping printing range of the upper laser and the lower laser, which becomes the overlapping area of AB, and the area shared by A, B, and AB is the cross-three area area.

As an optimization solution of the present invention, the partition control module is used to divide the imported part files into regions, and calculate the printing data corresponding to each region by using the method of calculating the scanning time of each part.

In order to achieve the purpose of the present invention, the adopted technical solution is: a method for performing partition control using a 3D printing part partition control device using scanning time, said method comprising the following steps:

Step 1: Analyze the part file data that needs to be printed;

Step 2: Divide the area for each printed part in the file, that is, judge the relationship between the Ymin and Ymax values in the part bounding box information of each print data and the two boundary lines-Y and the horizontal line of Y, and determine the size of each Whether the print data belongs to A area, B area, AB public area or across three areas;

Step 3: If the part to be printed belongs to area A, add the part data to the A data array linked list controlled by the upper laser; if the part to be printed belongs to area B, add the part data to the B data array controlled by the lower laser in the linked list;

Step 4: If the printed part belongs to the AB public area, the part data is allocated to the corresponding area according to the scan time in the A and B data array linked lists, so that the workload of the upper laser and the lower laser is balanced;

Step 5: If the printed part belongs to the three areas, the position of the part needs to be adjusted, and the user performs the corresponding rotation or movement operation;

Step 6: Start the thread, respectively control the upper laser, the lower laser, the upper scanning galvanometer and the lower scanning galvanometer to work together according to the data obtained above.

As an optimization scheme of the present invention, said step 2 specifically includes:

Step 2-1: If the position of the bounding box of the printed part satisfies: Ymax<-Y, then the print data belongs to the B area;

Step 2-2: If the position of the bounding box of the printed part satisfies: Ymax<Y, and Ymin<-Y at the same time, then the print data belongs to the B area;

Step 2-3: If the position of the bounding box of the printed part satisfies: Ymax<Y, and Ymin>Y at the same time, that is, the part belongs to the middle area, then the printed data belongs to the AB public area;

Step 2-4: If the position of the bounding box of the printed part satisfies: Ymax>Y, and Ymin>-Y at the same time, then the print data belongs to the area A;

Step 2-5: If the position of the bounding box of the printed part satisfies: Ymax>Y, and Ymin<-Y at the same time, then the print data belongs to the cross-three areas, and the user needs to be reminded.

As an optimization scheme of the present invention, step 4 specifically includes:

Step 4-1: If the AB public area data linked list is not empty, perform public area data allocation;

Step 4-2: Calculate the sum of scanning time required for each part in the data array linked list of area A and area B respectively;

Step 4-3: If the sum of the scanning time of each part in area A is greater than the sum of the scanning time of each part in area B, it means that the time required for scanning the number of parts in area A is greater than the time required for scanning parts in area B. Take a copy For the data in the AB public area, calculate the total scan time of this data and add it to the B area;

Step 4-4: According to the newly calculated sum of scan time in step 4-3, compare the scan time between area A and area B. When the sum of scan time in area A is still greater than the sum of scan time in area B, store the data in area B In the regional data linked list, otherwise, it is stored in the A regional data linked list, and the corresponding data in the AB public area data linked list is deleted at the same time;

Step 4-5: If the sum of scanning time in area A is less than the sum of scanning time in area B, it means that the number of parts in area A is less than the number of parts in area B. Take a copy of the data of AB public area and add the scanning time of area A;

Step 4-6: According to the newly calculated scan time in step 4-5, compare the total scan time between area A and area B again. When the sum of scan time in area A is still less than the sum of scan time in area B, store the data in area A In the data linked list, otherwise, it is stored in the B area data linked list, and the corresponding data in the AB public area data linked list is deleted at the same time;

Step 4-7: Determine whether the data linked list in the AB public area is empty, if the data is not empty, return to step 4-2 for subsequent steps.

The present invention has positive effects: 1) The present invention makes full use of the existing printing area, does not impose any restrictions on the placement of parts in the printing area, and can be placed at will. And through the method of the invention, the work tasks of the upper and lower lasers are effectively evenly divided, which greatly improves the printing efficiency and reduces the printing time. And the area has been determined when the first layer of the part is printed, and the subsequent layer adopts the area division method to ensure the integrity of the printed part;

2) The present invention can evenly divide the printing tasks of two lasers to the greatest extent, reduce the printing time of the same data, and improve printing efficiency.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the functional block diagram of device of the present invention;

Fig. 2 is a schematic diagram of the printing area covered by the dual laser of the present invention;

Fig. 3 is a schematic diagram of the public area of the present invention;

Fig. 4 is a schematic diagram of upper laser coverage of the present invention;

Fig. 5 is a schematic diagram of part area division of the present invention;

Fig. 6 is a schematic diagram of part time calculation in the present invention;

Fig. 7 is a schematic diagram of bounding box information in the present invention;

Figure 8 is the partition effect diagram of the parts calculated according to the scan time.

Detailed ways

The application will be further described below in conjunction with the drawings and embodiments.

As shown in Figure 1, the present invention discloses a 3D printing part partition control device utilizing scanning time. The galvanometer is connected to the upper laser, and the lower scanning galvanometer is connected to the lower laser. Figure 2 is a schematic diagram of the printing area covered by the dual lasers. The two large circles on the periphery are the scanning coverage of the upper and lower scanning galvanometers. The small circle in the middle is the actual printing area.

The upper computer includes: laser control module, scanning galvanometer control module, operation control module, file analysis module, partition control module and execution module;

The laser control module is used to control the energy emitted by the laser and control the switch of the laser;

The scanning galvanometer control module, according to the two-dimensional image of the printed part, sends the laser beam energy to the designated position;

The motion control module, according to the laser control module, the scanning galvanometer control module, and the mechanical movement to finally realize the part printing;

The file analysis module is used to analyze the data format of the part to be printed;

Partition control module, used for the division of the belonging area of parts; Figure 3 is a schematic diagram of the public area of the present invention, wherein the shaded part is the common printing area of two lasers, which is called the AB public area; Figure 4 is the upper laser of the present invention Coverage diagram, where the shaded part is the area that the upper laser needs to print on the substrate. As shown in Figure 5, it is a schematic diagram of the part area division of the present invention. According to the Y minimum value, Y maximum value in the part bounding box information and the positional relationship in the Y direction of the boundary line of the two stitching areas, it is determined that each printed part belongs to the A area , B area, AB common area or three areas; if the part to be printed belongs to the A area, then store the part data of the part in the data array linked list of the upper laser, and if the part to be printed belongs to the B area, then the part The part data of the laser is stored in the data array linked list of the lower laser. If the printed part belongs to the AB public area, the data of the part is allocated to the side of A area or B area with a shorter scanning time; if the printed part spans three areas, a dialog box will pop up to inform the user that the placement of a certain part needs to be adjusted , the user performs the corresponding rotation or movement operation processing;

The upper laser prints the data of area A, and the lower laser prints the data of area B.

The execution module separately controls the upper laser, the lower laser, the upper scanning vibrating mirror and the lower scanning vibrating mirror to work together according to the data obtained by the partition control module.

The file parsing module is used to parse out the bounding box information of each part, as shown in Figure 7 is a schematic diagram of the bounding box information of the present invention, this information is used to determine the location of each part that needs to be printed, the bounding box information includes: the abscissa of the part X minimum value Xmin, X maximum value Xmax, the ordinate Y minimum value Ymin and Y maximum value Ymax of the part, and the Z minimum value Zmin and Z maximum value Zmax data in the Z axis direction of the part.

The vertical coordinates of the boundary lines of the two stitching areas are -Y and Y respectively, two horizontal straight lines parallel to the X coordinate, the vertical coordinate Y and the upper area are the printing range of the upper laser, which is the B area; the coordinates -Y and the lower area are the lower laser The printing range is the A area; the area included from the ordinate -Y to the ordinate Y is the overlapping printing area of the upper laser and the lower laser, which becomes the overlapping area of AB, and the area shared by A, B, and AB is the three district area.

The partition control module is used to divide the imported part files into regions, and FIG. 6 is a schematic diagram of part time calculation in the present invention. Use the method of calculating the scanning time of each part in the area to calculate the corresponding printing data of each area. Figure 8 shows the final partition rendering of the part calculated according to the scan time.

The invention discloses a method for performing partition control by a 3D printing part partition control device using scanning time. The method includes the following steps:

Step 1: Analyze the part file data that needs to be printed;

Step 2: Divide the area for each printed part in the file, that is, judge the relationship between the Ymin and Ymax values in the part bounding box information of each print data and the two boundary lines-Y and the horizontal line of Y, and determine the size of each Whether the print data belongs to A area, B area, AB public area or across three areas;

Step 3: If the part to be printed belongs to area A, add the part data to the A data array linked list controlled by the upper laser; if the part to be printed belongs to area B, add the part data to the B data array controlled by the lower laser in the linked list;

Step 4: If the printed part belongs to the AB public area, the part data is allocated to the corresponding area according to the scan time in the A and B data array linked lists, so that the workload of the upper laser and the lower laser is balanced;

Step 5: If the printed part belongs to the three areas, the position of the part needs to be adjusted, and the user performs the corresponding rotation or movement operation;

Step 6: Start the thread, respectively control the upper laser, the lower laser, the upper scanning galvanometer and the lower scanning galvanometer to work together according to the data obtained above.

Step 2 specifically includes:

Step 2-1: If the position of the bounding box of the printed part satisfies: Ymax<-Y, then the print data belongs to the B area;

Step 2-2: If the position of the bounding box of the printed part satisfies: Ymax<Y, and Ymin<-Y at the same time, then the print data belongs to the B area;

Step 2-3: If the position of the bounding box of the printed part satisfies: Ymax<Y, and Ymin>Y at the same time, that is, the part belongs to the middle area, then the printed data belongs to the AB public area;

Step 2-4: If the position of the bounding box of the printed part satisfies: Ymax>Y, and Ymin>-Y at the same time, then the print data belongs to the area A;

Step 2-5: If the position of the bounding box of the printed part satisfies: Ymax>Y, and Ymin<-Y at the same time, then the print data belongs to the cross-three areas, and the user needs to be reminded.

Step 4 specifically includes:

Step 4-1: If the AB public area data linked list is not empty, perform public area data allocation;

Step 4-2: Calculate the sum of scanning time required for each part in the data array linked list of area A and area B respectively; obtain the scanning line segment of the current part according to the data in the array linked list of A, and traverse all the layer data of the current part to obtain the current The scanning time of the part scanning data under the bounding box, and finally add the scanning time of all the data in the A array linked list to obtain a sum of the scanning time of all parts in the current A array. The B data linked list is calculated in the same way to obtain the sum of the scanning time of all parts in the B array.

Step 4-3: If the sum of the scanning time of each part in area A is greater than the sum of the scanning time of each part in area B, it means that the time required for scanning the number of parts in area A is greater than the time required for scanning parts in area B. Take a copy For the data in the AB public area, calculate the total scan time of this data and add it to the B area;

Step 4-4: According to the newly calculated sum of scan time in step 4-3, compare the scan time between area A and area B. When the sum of scan time in area A is still greater than the sum of scan time in area B, store the data in area B In the regional data linked list, otherwise, it is stored in the A regional data linked list, and the corresponding data in the AB public area data linked list is deleted at the same time;

Step 4-5: If the sum of scanning time in area A is less than the sum of scanning time in area B, it means that the number of parts in area A is less than the number of parts in area B. Take a copy of the data of AB public area and add the scanning time of area A;

Step 4-6: According to the newly calculated scan time in step 4-5, compare the total scan time between area A and area B again. When the sum of scan time in area A is still less than the sum of scan time in area B, store the data in area A In the data linked list, otherwise, it is stored in the B area data linked list, and the corresponding data in the AB public area data linked list is deleted at the same time;

Step 4-7: Determine whether the data linked list in the AB public area is empty, if the data is not empty, return to step 4-2 for subsequent steps.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A 3D printing part partition control device utilizing scanning time, characterized in that: the control device includes an upper laser device, a lower laser device, an upper scanning vibrating mirror and a lower scanning vibrating mirror all connected to the host computer, and the upper scanning vibrating mirror The scanning galvanometer is connected to the upper laser, and the lower scanning galvanometer is connected to the lower laser, The upper computer includes: a laser control module, a scanning galvanometer control module, a motion control control module, a file analysis module, a partition control module and an execution module; The laser control module is used to control the amount of energy emitted by the laser and control the switch of the laser; The scanning galvanometer control module drives the energy of the laser beam to a designated position according to the two-dimensional image of the part to be printed; The motion control module, according to the laser control module and the scanning galvanometer control module, cooperates with the mechanical movement to finally realize the part printing; The file analysis module is used to analyze the data format of the parts to be printed; The partition control module is used to divide the belonging area of the part; judge the Y minimum value, the Y maximum value and the positional relationship in the Y direction of the boundary line of the two splicing areas in the bounding box information of each part that needs to be printed, and determine each The printed part belongs to A area, B area, AB public area or three areas; The execution module separately controls the upper laser, the lower laser, the upper scanning vibrating mirror and the lower scanning vibrating mirror to work together according to the data obtained by the partition control module. 2. A 3D printing part partition control device utilizing scanning time according to claim 1, characterized in that: the file parsing module is used to parse out the bounding box information of each part, and the bounding box information includes: part X minimum value Xmin, X maximum value Xmax on the abscissa, Y minimum value Ymin and Y maximum value Ymax on the ordinate of the part, and Z minimum value Zmin and Z maximum value Zmax data on the Z axis direction of the part. 3. A 3D printing part partition control device utilizing scanning time according to claim 2, characterized in that: the ordinates of the boundary lines of the two splicing areas are respectively -Y and Y, and the ordinate Y and the upper area are The printing range of the upper laser is the A area; the coordinate -Y and the lower area are the printing range of the lower laser, which is the B area; the area from the vertical coordinate -Y to the vertical coordinate Y is the overlapping printing range of the upper laser and the lower laser, which becomes AB Overlapping area, when and the area shared by A, B, and AB is the area across three areas. 4. A 3D printing part partition control device utilizing scan time according to claim 3, characterized in that: the partition control module is used to divide the imported part files into regions, and use the calculation method of scanning time of each part method to calculate the print data corresponding to each area. 5. A method for zone control using a 3D printing part zone control device utilizing scanning time according to claim 1, characterized in that: said method comprises the following steps: Step 1: Analyze the part file data that needs to be printed; Step 2: Divide the area for each printed part in the file, that is, judge the relationship between the Ymin and Ymax values in the part bounding box information of each print data and the two boundary lines-Y and the horizontal line of Y, and determine the size of each Whether the print data belongs to A area, B area, AB public area or across three areas; Step 3: If the part to be printed belongs to area A, add the part data to the A data array linked list controlled by the upper laser; if the part to be printed belongs to area B, add the part data to the B data array controlled by the lower laser in the linked list; Step 4: If the printed part belongs to the AB public area, the part data is allocated to the corresponding area according to the scan time in the A and B data array linked lists, so that the workload of the upper laser and the lower laser is balanced; Step 5: If the printed part belongs to the three areas, the position of the part needs to be adjusted, and the user performs the corresponding rotation or movement operation; Step 6: Start the thread, respectively control the upper laser, the lower laser, the upper scanning galvanometer and the lower scanning galvanometer to work together according to the data obtained above. 6. A method for zone control by a 3D printing part zone control device using scanning time according to claim 5, characterized in that: said step 2 specifically includes: Step 2-1: If the position of the bounding box of the printed part satisfies: Ymax<-Y, then the print data belongs to the B area; Step 2-2: If the position of the bounding box of the printed part satisfies: Ymax<Y, and Ymin<-Y at the same time, then the print data belongs to the B area; Step 2-3: If the position of the bounding box of the printed part satisfies: Ymax<Y, and Ymin>Y at the same time, that is, the part belongs to the middle area, then the printed data belongs to the AB public area; Step 2-4: If the position of the bounding box of the printed part satisfies: Ymax>Y, and Ymin>-Y at the same time, then the print data belongs to the area A; Step 2-5: If the position of the bounding box of the printed part satisfies: Ymax>Y, and Ymin<-Y at the same time, then the print data belongs to the cross-three areas, and the user needs to be reminded. 7. A method for zone control by a 3D printing part zone control device using scanning time according to claim 5, characterized in that: said step 4 specifically includes: Step 4-1: If the AB public area data linked list is not empty, perform public area data allocation; Step 4-2: Calculate the sum of scanning time required for each part in the data array linked list of area A and area B respectively; Step 4-3: If the sum of the scanning time of each part in area A is greater than the sum of the scanning time of each part in area B, it means that the time required for scanning the number of parts in area A is greater than the time required for scanning parts in area B. Take a copy For the data in the AB public area, calculate the total scan time of this data and add it to the B area; Step 4-4: According to the newly calculated sum of scan time in step 4-3, compare the scan time between area A and area B. When the sum of scan time in area A is still greater than the sum of scan time in area B, store the data in area B In the regional data linked list, otherwise, it is stored in the A regional data linked list, and the corresponding data in the AB public area data linked list is deleted at the same time; Step 4-5: If the sum of scanning time in area A is less than the sum of scanning time in area B, it means that the number of parts in area A is less than the number of parts in area B. Take a copy of the data of AB public area and add the scanning time of area A; Step 4-6: According to the newly calculated scan time in step 4-5, compare the total scan time between area A and area B again. When the sum of scan time in area A is still less than the sum of scan time in area B, store the data in area A In the data linked list, otherwise, it is stored in the B area data linked list, and the corresponding data in the AB public area data linked list is deleted at the same time; Step 4-7: Determine whether the data linked list in the AB public area is empty, if the data is not empty, return to step 4-2 for subsequent steps.

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