WO2021114600A1

WO2021114600A1 - Processing area dividing and processing method for additive manufacturing apparatus having multiple processing heads

Info

Publication number: WO2021114600A1
Application number: PCT/CN2020/096330
Authority: WO
Inventors: 马明明; 王思维; 李林; 杨颖�; 陈勇; 张月来; 廖宁宁; 李泽之
Original assignee: 株洲国创轨道科技有限公司
Priority date: 2019-12-13
Filing date: 2020-06-16
Publication date: 2021-06-17
Also published as: CN111014670A; CN111014670B

Abstract

A processing area dividing and processing method for an additive manufacturing apparatus having multiple processing heads, allowing a smart delineation of a scan area of a large-format complex cross-section, comprising the steps of: S01, determining closed area A comprising all closed patterns in the cross-section of a certain layer of a processing part and N the number of processing heads; S02, determining a point in the closed area, dividing closed area A into N quadrants with the point as the point of origin, ensuring that the closed patterns that each quadrant comprises are identical in area, each quadrant corresponding to one scan processing head; in step S02, if a closed pattern is continuously distributed in two or more adjacent quadrants, then re-dividing scan areas in each of the adjacent quadrants, thus ensuring that different scan heads are prevented from scanning in adjacent areas at the same time, and reducing heat input in a same area. The method of the present invention has the advantages of high processing efficiency and reduced heat accumulation.

Description

Processing area division and processing method of multi-processing head additive manufacturing equipment

【Technical Field】

The present invention mainly relates to the technical field of additive manufacturing, and particularly refers to a processing area division and processing method of a multi-processing head additive manufacturing equipment.

【Background technique】

Additive manufacturing technology (commonly known as "3D printing" technology) is an advanced manufacturing technology that has gradually developed in the last thirty years. It is a kind of digital model based on which materials are continuously added and stacked to form a three-dimensional entity. Emerging manufacturing processes for parts. Since the 1980s, additive manufacturing technology has gradually developed from layered forming technology based on bonding principles to light curing technology using ultraviolet light as a processing heat source, and then developed to high-energy beams such as lasers, electron beams, and electric arcs. The melt forming technology for processing heat sources realizes the additive manufacturing forming of products such as organic materials, inorganic non-metallic materials, and metal materials. For metal materials, there are generally three different forms of high-energy beam additive manufacturing technologies, including laser additive manufacturing, electron beam additive manufacturing, and plasma arc additive manufacturing, depending on the heat source during processing. The forming raw materials generally include metal powder and Two states of welding wire.

In the high-energy beam additive manufacturing technology of metal parts, if the forming size is less than 300mm×300mm, a single laser beam, or a single electron beam, or a single arc head is generally used for processing and forming. If the unidirectional size is more than 300mm, generally use dual/multiple laser beams, or dual/multiple electron beams, or dual/multiple arc heads for processing and forming to improve the forming efficiency of the parts. However, in the process of multi-processing head processing, generally the work area of each processing head is divided by a simple four-quadrant division method. This leads to the situation that when scanning workpieces with uneven distribution of slice contours or parts with special requirements for positioning, a certain processing head will be idle after the work is completed, while other processing heads are still working. Even in some sections, there will be only one processing head working, and multiple processing heads will conflict when scanning the same area, which affects the overall forming efficiency.

In summary, due to the singleness of the existing multiple processing head printing interval division method and the limitations of the existing laser scanning method, the position of the workpiece with complex scanning structure and irregular slice contour shape distribution is special. When required parts, it is impossible to ensure that multiple processing heads can work simultaneously and efficiently, which increases the forming time.

[Summary of the invention]

The technical problem to be solved by the present invention lies in: in view of the technical problems existing in the prior art, the present invention provides a method for dividing and processing the processing area of a multi-processing head additive manufacturing equipment with high processing efficiency.

In order to solve the above technical problems, the technical solution proposed by the present invention is as follows:

A processing area division and processing method of multi-processing head additive manufacturing equipment, including the following steps:

S01. Determine a closed area A and the number of processing heads N containing all closed graphics in a certain layer of the processed part, N≥2;

S02. Determine a point O in the enclosed area. Use this point as the origin to divide the enclosed area A into N quadrants to ensure that the area of the enclosed graphics contained in each quadrant is equal, and each quadrant corresponds to a processing head;

S03 and N processing heads respectively scan and process the scanning areas in the N quadrants.

As a further improvement of the above technical solution:

In step S02, if there is only one closed figure in a certain layer section, point O will be located at the geometric center or geometric center of gravity of the closed figure, and the area of the closed figure in each quadrant needs to be further divided, specifically as step a1: Respectively determine a point Q1, Q2...QN in the scan area in each quadrant, and use this point as the sub-origin to divide the scan area in the quadrant into N sub-quadrant areas. The area of each sub-quadrant area is equal. The sub-quadrants in each quadrant are arranged clockwise to stagger the scanning of the processing heads to ensure that multiple processing heads will not scan and process adjacent areas at the same time to reduce heat accumulation; the sub-origin is the geometric center or geometric center of gravity of the closed figure.

In step S02, if there are multiple closed figures in a certain layer, point O will be located at the geometric center or geometric center of gravity of the closed area A, and the closed area A will be divided into N quadrants with this point as the origin to ensure that each quadrant The enclosed graphics contained within have the same area, and each quadrant corresponds to a scanning processing head.

If there is a closed figure continuously distributed in adjacent quadrants, a point is determined in each part of the figure divided by adjacent quadrants of the closed figure, and the closed figure in this quadrant is divided into sub-four-quadrant regions with this point as the sub-origin. The area of each sub-quadrant area is the same; when scanning, the processing head is arranged in a clockwise order according to the sub-quadrant of the closed figure in each quadrant. The scanning head is staggered and scanned; the sub-origin is the geometric center or geometry of the corresponding part of each quadrant after the closed figure is divided by the quadrant. Center of gravity.

If there are two closed figures continuously distributed in adjacent quadrants, then a point is determined in each part of the closed figure divided by adjacent quadrants, and the closed figure in this quadrant is divided into sub-four-quadrant regions with this point as the sub-origin , The area of each sub-quadrant area is equal; when scanning, the processing head is arranged in a clockwise order according to the sub-quadrants of the closed graphics in each quadrant to stagger the scanning; the sub-origin is the geometric center of the corresponding part of the graphics in each quadrant after the closed graphics is divided by the quadrants or Geometric center of gravity.

If there are N-1 closed figures continuously distributed in adjacent quadrants, then a point is determined in each part of the figure divided by adjacent quadrants of the closed figure, and the closed figure in the quadrant is divided into four by using this point as the sub-origin. Quadrant area, the area of each sub-quadrant area is equal; when scanning, the processing head is arranged to stagger the scanning according to the sub-quadrant of the closed figure in each quadrant in clockwise order; the sub-origin is the geometry of the corresponding part of the figure in each quadrant after the closed figure is divided by the quadrant Center or geometric center of gravity.

If there are N closed graphics continuously distributed in adjacent quadrants, the method further includes step e1: twisting the quadrants divided by the closed graphics in the closed area A to re-divide the closed area.

In step S01, the method for determining the enclosed area A is as follows: the longest enclosed envelope is determined by analyzing all the edges of the enclosed figure contours, and the area enclosed by the envelope is the enclosed area A.

In step S02, the quadrant axes of the N quadrants can be any angle between 0° and 180°.

After step a1, it also includes:

Step a2: Make the processing head corresponding to the quadrant scan and process the enclosed graphics in the first quadrant of the sub-quadrant;

Step a3: After scanning and processing the first quadrant of the sub-quadrant, the scanning processing head continues to scan and process the closed graphics in the second, third, and fourth quadrants of the sub-quadrant in a clockwise order.

When there are multiple closed figures in a certain layer section and there is a closed figure continuously distributed in adjacent quadrants, or when there are multiple closed figures in a certain layer section and there are two closed figures continuously distributed in adjacent quadrants, or When there are multiple closed figures in a certain layer section and there are N-1 closed figures continuously distributed in adjacent quadrants, the processing method is:

Step b1: Determine a point in each scan area divided by adjacent quadrants of the closed figure, and divide the scan area in the quadrant into sub-quadrant areas with this point as the sub-origin, and the area of each sub-quadrant area is equal;

Step b2: scan and process the closed graphics in the first quadrant of each closed graphics sub-quadrant within the object limit of the scanning processing head corresponding to the quadrant;

Step b3: Make the scanning processing head continue to scan and process the scanning patterns in the second, third, and fourth quadrants of the sub-quadrants in a clockwise order.

Compared with the prior art, the advantages of the present invention are:

The processing area division and processing method of the multi-processing-head additive manufacturing equipment of the present invention analyzes the slicing of the parts in the processing area and divides it into quadrants corresponding to each processing head one-to-one, which can ensure that all processing heads participate in scanning. The idle state of individual processing heads caused by the existing four-quadrant division method improves the processing efficiency.

The processing area division and processing method of the multi-processing head additive manufacturing equipment of the present invention analyzes the cross-section of the parts and divides the area reasonably, ensuring that all print heads can scan areas of the same area size, can work synchronously, and avoid certain The processing head is in idle state after working, while other processing heads are still working, which further improves the processing efficiency. In addition, by reasonably dividing the area of the part slice section, the conflict between the processing heads and the overlap of the laser beams caused by the high thermal stress inside the workpiece when the processing heads are working simultaneously are avoided.

The processing area division and processing method of the multi-processing head additive manufacturing equipment of the present invention, wherein the number of processing heads is not less than three, and the specific method is suitable for complex processing structures, irregular slice contour shapes, and special requirements for position placement Parts.

【Explanation of the drawings】

Figure 1 is a schematic diagram of a closed area A in the present invention.

Fig. 2 is a schematic diagram of the enclosed area divided into n quadrants in the present invention.

Fig. 3 is a schematic diagram of the n quadrants in the enclosed area divided into four quadrants in the present invention.

Fig. 4 is a schematic diagram of the continuous distribution of N closed figures in adjacent quadrants in the present invention.

Fig. 5 is a schematic diagram of the conversion of the continuous distribution of N closed figures in adjacent quadrants to other situations in the present invention.

Fig. 6 is a schematic diagram of the division of neutron four quadrants according to the first embodiment of the invention.

FIG. 7 is a schematic diagram of division in Embodiment 1 of the present invention.

Fig. 8 is a schematic diagram of the division according to the second embodiment of the present invention.

FIG. 9 is a schematic diagram of the division according to the third embodiment of the present invention.

【Detailed ways】

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

As shown in Figures 1-9, the processing area division and processing method of the multi-processing head additive manufacturing equipment of this embodiment, the number of processing heads is not less than three, and specifically includes the following steps:

S03, N processing heads respectively scan and process the scanning areas in the N quadrants, and the scanning path of each area follows the scanning strategy of the device's own software. as shown in picture 2.

In this embodiment, in step S01, the method for determining the enclosed area A is as follows: by analyzing all the edges of the closed figure contours, the longest enclosed envelope is determined, and the area enclosed by the envelope is the enclosed Area A, as shown in Figure 1; In addition, the processing head whose processing method is synchronous powder feeding is a processing head that can move in the plane formed by the X-axis direction and the Y-axis direction and can scan the entire area separately; the processing method is pre-processing. The processing head for placing powder is a fixed non-movable processing head that can scan the entire area alone.

As shown in Figure 3, when there is only one closed figure in a certain layer section, no matter where it is located in the forming area, N processing heads process the slice of the layer together. The corresponding division method is as follows:

Obtain the shape of the closed figure in the slice section of the part, determine a point P by analyzing the shape of the closed figure, and use this point as the origin to divide the closed figure into N quadrants B1, B2, B3...BN to ensure each quadrant The enclosed figures contained within are equal in area. Point P is determined by the shape of the closed figure in the slice section of the part, and can be the geometric center of the closed figure or the geometric center of gravity.

Determine the shape of the enclosed area enclosed by each of the above-mentioned quadrants and the outline of the enclosed figure. By analyzing the enclosed area, determine a point Q, and use this point as the sub-origin to divide the enclosed area into N sub-quadrants I, II, III, IV... N. The Q point is determined by the shape of the enclosed area, which can be the geometric center or the geometric center of gravity;

Subsequent N processing heads are allocated to process the areas in the B1, B2...BN quadrants respectively. The processing method is as follows:

The processing head N1 is processing I1, the processing head N2 is processing I2... the processing head NN is processing IN; when the processing is completed, each processing head will continue processing clockwise in their respective areas, and the processing path is I→II→III→IV...→ N, as shown in Figure 3.

In this embodiment, when there are n closed figures in the section of a certain layer of a part slice, and the n closed figures are concentrated in a corner or center of the forming area, the N processing heads process the slice together, and the corresponding division method is as follows :

Determine the closed area C that contains all closed figures. The method for determining C is as follows: by analyzing all the edges of the closed figure contours, determine a longest closed envelope. The area enclosed by the envelope is the closed area C.

Analyze the shape of C and the area of all closed figures in the C area, determine a point E, use this point as the origin to divide the C area into N quadrants C1, C2, C3...CN, and ensure that each quadrant contains The closed figures have the same area.

In this embodiment, in step S02, when there is only one closed figure in a certain layer section, the N processing heads jointly process the closed figure, and the corresponding division method is as follows:

Step a1: Analyze the shape of the closed figure and determine a point F. Use this point as the origin to divide the closed figure into N quadrants F1, F2, F3...FN, and the area of the closed figure contained in each quadrant is equal; F The point is determined by the shape of the closed figure in the slice section of the part, and can be the geometric center of the closed figure or the geometric center of gravity.

Step a2: Determine the shape of the closed area enclosed by each of the above quadrants and the closed figure contour, analyze the closed area to determine a point G, and use this point as the sub-origin to divide the closed area into N sub-quadrants; point G is defined by the closed area The shape of is determined, which can be the geometric center or the geometric center of gravity;

Subsequent N processing heads are allocated to process the areas in the F1, F2, F3...FN quadrants respectively, and the corresponding follow-up processing methods are:

Processing head N1 processes the first quadrant of F1, processing head N2 processes the first quadrant of F2...Processing head NN processes the first quadrant of FN; when processing is completed, each processing head continues clockwise after processing the first quadrant Processing until the Nth quadrant.

In this embodiment, in step S02, when there are multiple closed figures in a certain layer section, and there are 1—(N-1) closed figures continuously distributed in adjacent quadrants, the corresponding division method is as follows:

Step b1: Determine a point in each part of the closed figure divided by adjacent quadrants, and divide the closed figure in the quadrant into sub-four-quadrant regions with this point as the sub-origin, and the area of each sub-quadrant region is equal;

Step b2: scan and process the closed graphics in the first quadrant of each scan graphics sub-quadrant within the object limit of the scanning processing head corresponding to the quadrant;

Subsequent redistribution of the corresponding processing heads respectively process other sub-quadrant regions in the N quadrants.

The present invention also correspondingly discloses a processing method based on the processing area division method of the multi-processing head additive manufacturing equipment as described above.

In this embodiment, if the enclosed graphics in each quadrant are independent of each other, the N processing heads scan and process the scanning areas in the N quadrants, and the scanning path of each area follows the scanning strategy of the device's own software.

The following describes the processing methods in other situations:

When there is only one closed figure in a certain layer section, the processing method is:

Step a1: Respectively determine a point P1, P2...PN in the scanning area in each quadrant, and divide the scanning area in the quadrant into N sub-quadrant areas with this point as the sub-origin, and the area of each sub-quadrant area is equal;

Step a2: Make the processing head corresponding to the quadrant scan and process the scanned graphics in the first quadrant of the sub-quadrant,

Step a3: Make the processing head continue to scan and process the closed graphics in the second, third...Nth quadrants of the sub-quadrants in a clockwise order.

When there are multiple closed figures in a certain layer section, and there are 1—(N-1) closed figures continuously distributed in adjacent quadrants, the processing method is:

Step b3: Make the scanning processing head continue to scan and process the closed graphics in the second, third, and fourth quadrants of the sub-quadrants in a clockwise order.

The processing method of the multi-processing-head additive manufacturing equipment of the present invention analyzes the slicing of the parts in the processing area and divides it into quadrants corresponding to each processing head one-to-one, which can ensure that all processing heads participate in scanning, which is compared with the existing four-quadrants. The idle state of individual processing heads caused by the division method improves the processing efficiency.

The method of the present invention analyzes the section section of the part and divides the area reasonably, ensuring that all the print heads can scan the same area of the area, can work synchronously, and avoid the idle state after a certain processing head is finished, while other processing heads are still working The situation further improves the processing efficiency. In addition, by reasonably dividing the area of the part slice section, the conflict between the processing heads and the overlap of the laser beams caused by the high thermal stress inside the workpiece when the processing heads are working simultaneously are avoided.

In the method of the present invention, the number of processing heads is not less than three. The specific method is suitable for processing parts with complex structures, irregular slice contour shapes, and special requirements for position placement.

The above-mentioned processing method will be further explained below in combination with three complete specific embodiments:

Example one:

A method for processing closed graphics in the slice section of an additive manufacturing equipment with 4 processing heads:

Step 1.1): Determine the number of closed graphics in a certain layer of the part slice is 4, and the closed area A that contains all the closed graphics. The method of determining A is as follows: Determine the longest one by analyzing all the contours of the closed graphics at the edge Close the envelope, the area enclosed by the envelope is A;

Step 1.2): Determine the number of processing heads: 4;

Step 1.3): Determine a point O through the analysis of the shape of A and the area of all closed figures in the A area. Use this point as the origin to divide the A area into A1, A2, A3, and A4 to ensure that each quadrant contains The area of scanned graphics is equal;

Step 1.4): Analyze the closed graphics continuously distributed in the three quadrants, determine a point in each scanning area where the closed graphics is divided by adjacent quadrants, determine one point, and divide the closed graphics into four sub-fours with this point as the origin Quadrants, each sub-quadrant contains the same closed figure area. The working area of each processing head corresponds to a quadrant area. As shown in Figure 4;

Step 1.5): Assign the processing head corresponding to the area to the independent closed graphics in each quadrant for processing, and the scanning path of each area follows the scanning strategy of the device's own software;

Step 1.6): The processing head processes the first to fourth quadrants of the sub-quadrants in each part of the closed graphics continuously distributed in the three quadrants divided by the quadrant axis. The scanning path follows the scanning strategy of the device's own software. As shown in Figures 6 and 7.

Embodiment two:

A method for processing closed graphics in the slice section of an additive manufacturing equipment with 5 processing heads:

Step 2.1): Determine the number of closed graphics in a certain layer of the part slice is 1,

Step 2.2): Determine the number of processing heads: 5;

Step 2.3): Determine a point O by analyzing the shape of the closed figure, and divide the closed figure into 5 quadrants with this point as the origin, and the area of the closed figure contained in each quadrant is equal;

Step 2.4): Respectively determine a point P1, P2...P5 in the scan area in each quadrant, and divide the scan area in the quadrant into 5 sub-quadrant areas with this point as the sub-origin, and the area of each sub-quadrant area is equal;

Step 2.5): Make the processing head corresponding to the quadrant scan and process the scanned graphics in the first quadrant of the sub-quadrant,

Step 2.6): Make the processing head continue to scan and process the closed graphics in the second, third, fourth, and fifth quadrants of the sub-quadrants in a clockwise order. As shown in Figure 8.

Embodiment three:

An intelligent processing method for additive manufacturing equipment with 5 processing heads:

Step 3.1): Determine the number of closed graphics in a certain layer of the part slice as 3, and the closed area A that contains all closed graphics. The method of determining A is as follows: Determine the longest one by analyzing all the edges of the closed graphics contours Close the envelope, the area enclosed by the envelope is A;

Step 3.2): Determine the number of processing heads: 5;

Step 3.3): Determine a point O through the analysis of the shape of A and the area of all closed figures in the A area. Use this point as the origin to divide the A area into A1, A2, A3, A4, A5, and ensure that each quadrant contains The closed figures have the same area;

Step 3.4): Determine one point in the enclosed area contained in each quadrant, use these points as the origin to make the four quadrants, and divide the enclosed graphics in each quadrant into sub-four quadrants.

Step 3.5): The processing sequence of each processing head in the area {An} is: start processing from the first quadrant of the sub-quadrants of the closed graphics in each quadrant, and process to the fourth quadrant in a clockwise order, as shown in Figure 9. Show.

Although the present invention has been disclosed as above in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into equivalent implementations of equivalent changes. example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

A processing area division and processing method of a multi-processing head additive manufacturing equipment, which is characterized in that it comprises the following steps:

S01. Determine a closed area A and the number of processing heads N containing all closed graphics in a certain layer of the processed part, N≥2;

S02. Determine a point O in the enclosed area. Use this point as the origin to divide the enclosed area A into N quadrants to ensure that the area of the enclosed graphics contained in each quadrant is equal, and each quadrant corresponds to a processing head;

S03 and N processing heads respectively scan and process the scanning areas in the N quadrants.
The processing area division and processing method of the multi-processing head additive manufacturing equipment according to claim 1, wherein in step S02, if there is only one closed figure in a certain layer section, the O point will be located at the edge of the closed figure. The geometric center or the geometric center of gravity needs to be further divided into the area of the closed figure in each quadrant, specifically as step a1: Respectively determine a point Q1, Q2...QN in the scanning area in each quadrant, and use this point as a sub The origin divides the scanning area in this quadrant into N sub-quadrants. The area of each sub-quadrant is the same. When scanning, the processing heads are arranged in a clockwise order in each quadrant to stagger the scanning to ensure that multiple processing heads will not be at the same time. Scanning and processing in adjacent areas reduces heat accumulation; the sub-origin is the geometric center or geometric center of gravity of the closed figure.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to claim 1, wherein in step S02, if there are multiple closed patterns in a certain layer section, the O point will be located in the closed area A The closed area A is divided into N quadrants with this point as the origin to ensure that the area of the closed figure contained in each quadrant is equal, and each quadrant corresponds to a scanning processing head.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to claim 3, wherein if there is a closed figure continuously distributed in adjacent quadrants, the closed figure is divided by adjacent quadrants. Determine a point in each part of the graphic, and use this point as the sub-origin to divide the enclosed graphic in the quadrant into sub-quadrant regions, each of which has the same area; when scanning, follow the clockwise order of the sub-quadrants of the enclosed graphics in each quadrant. Arrange the processing head to stagger the scanning; the sub-origin is the geometric center or geometric center of gravity of the corresponding part of the figure in each quadrant after the closed figure is divided by the quadrant.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to claim 3, wherein if there are two closed graphics continuously distributed in adjacent quadrants, the closed graphics are divided by adjacent quadrants Determine a point in each part of the figure, and use this point as the sub-origin to divide the enclosed figure in the quadrant into four-quadrant regions, and the area of each sub-quadrant area is equal; when scanning, the closed figure in each quadrant is clockwise. The processing heads are arranged in order to stagger the scanning; the sub-origin is the geometric center or geometric center of gravity of the corresponding part of each quadrant after the closed figure is divided by the quadrant.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to claim 3, wherein if there are N-1 closed graphics continuously distributed in adjacent quadrants, the closed graphics are adjacent to each other. Determine a point in each part of the graphics of the quadrant division, and use this point as the sub-origin to divide the closed graphics in the quadrant into sub-quadrant regions. The area of each sub-quadrant region is equal; when scanning, it is based on the sub-quadrants of the closed graphics in each quadrant. The processing heads are arranged in a clockwise order to stagger the scanning; the sub-origin is the geometric center or geometric center of gravity of the corresponding part of the figure in each quadrant after the closed figure is divided by the quadrant.
The processing area division and processing method of the multi-processing head additive manufacturing equipment according to claim 3, wherein if there are N closed patterns continuously distributed in adjacent quadrants, the method further comprises step e1: The quadrants divided by the closed figure of, are twisted to re-divide the closed area.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to any one of claims 1 to 7, wherein in step S01, the method for determining the enclosed area A is as follows: by analyzing all The contour of the closed figure at the most edge determines the longest closed envelope. The area enclosed by the envelope is the closed area A.
The processing area division and processing method of the multi-processing head additive manufacturing equipment according to claim 1, wherein in step S02, the quadrant axes of the N quadrants can be any angle between 0° and 180°.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to claim 2, wherein after step a1, it further comprises:

Step a2: Make the processing head corresponding to the quadrant scan and process the enclosed graphics in the first quadrant of the sub-quadrant;

Step a3: After scanning and processing the first quadrant of the sub-quadrant, the scanning processing head continues to scan and process the closed graphics in the second, third, and fourth quadrants of the sub-quadrant in a clockwise order.
The processing area division and processing method of a multi-processing head additive manufacturing equipment according to claim 4, wherein when there are multiple closed figures in a certain layer section and there is a closed figure continuously distributed in adjacent quadrants, Or when a certain layer section has multiple closed figures and two closed figures are continuously distributed in adjacent quadrants, or when a certain layer section has multiple closed figures and there are N-1 closed figures continuous in adjacent quadrants Distribution, the processing method is:

Step b1: Determine a point in each scan area divided by adjacent quadrants of the closed figure, and divide the scan area in the quadrant into sub-quadrant areas with this point as the sub-origin, and the area of each sub-quadrant area is equal;

Step b2: scan and process the closed graphics in the first quadrant of each closed graphics sub-quadrant within the object limit of the scanning processing head corresponding to the quadrant;

Step b3: Make the scanning processing head continue to scan and process the scanning patterns in the second, third, and fourth quadrants of the sub-quadrants in a clockwise order.