CN108480637B - Multi-part layout optimization processing method and system for laser additive manufacturing - Google Patents
Multi-part layout optimization processing method and system for laser additive manufacturing Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a multi-part layout optimization processing method for laser additive manufacturing, which comprises the following steps: reading X-axis and Y-axis data of the minimum bounding box of each part from all part slicing files; simultaneously translating the part layer cutting data and the support layer cutting data to enable the gap between the minimum bounding boxes of the two adjacent parts in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper to be a preset value L; generating a multi-part integral minimum bounding box, if the X-axis length of the multi-part integral minimum bounding box is less than the X-axis length of the processing box body, and the Y-axis length of the multi-part integral minimum bounding box is less than the Y-axis length of the processing box body, turning to the next step, otherwise, ending; generating a starting position and a terminal position of a high-speed movement section of the scraper, and generating a starting position and a terminal position of a low-speed movement section of the scraper; and controlling the scraper to move according to the starting position and the end position of the high-speed movement section and the low-speed movement section.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a multi-part layout optimization processing method and system for laser additive manufacturing.
Background
Additive Manufacturing (AM), also known as 3D printing technology, is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and printing layer by layer on the basis of a digital part file. In order to make full use of the forming box, a plurality of smaller parts are often placed in one forming box for processing. The time consumption of scraper movement in laser additive manufacturing is far higher than the laser scanning speed, and the scraper movement distance and speed are important factors for determining the time consumption of laser additive manufacturing, so that the total time consumption in laser additive manufacturing can be obviously reduced by saving the scraper movement distance and increasing the scraper movement speed.
In the multi-part laser additive manufacturing, not only the collision between parts in the space is avoided, but also the layout of the multi-part in the forming box body is prevented from being dispersed. The layout of the scattered parts in the forming box body may cause that the movement distance of the scraper is long after the laser layer scanning of the photocuring 3D printer is completed every time, or the stroke of a non-processing area of the powder sintering 3D printer, which can improve the movement speed of the scraper, is shortened.
Chinese patent application No. CN201510937549.8 proposes a collision detection method and system for three-dimensional parts. The method and the system judge the collision between the parts only through the projection shapes of the part files on the horizontal plane, do not detect the space of the parts in the processing box body, and do not adjust the layout of the parts in the processing box body.
Disclosure of Invention
In view of the above defects or improvement requirements of the prior art, the present invention provides a layout optimization processing method and system for multiple parts in laser additive manufacturing, which aims to perform layout optimization on the spacing between the parts and reduce the movement time of a scraper as much as possible, thereby solving the technical problem that collision detection cannot be performed quickly to improve the processing efficiency in the prior art.
To achieve the above object, according to one aspect of the present invention, there is provided a multi-part layout optimization machining method for laser additive manufacturing, including:
s100, reading X-axis and Y-axis data of the minimum bounding box of each part from all part slicing files;
s200, simultaneously translating the part layer cutting data and the support layer cutting data to enable the gap between the adjacent two part minimum bounding boxes in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper to be a preset value L, and moving the multi-part integral minimum bounding box to enable the center position of the multi-part integral minimum bounding box to be basically coincident with the center position of the processing box body;
s300, generating a multi-part overall minimum bounding box, if the X-axis length of the multi-part overall minimum bounding box is smaller than the X-axis length of the processing box body, and the Y-axis length of the multi-part overall minimum bounding box is smaller than the Y-axis length of the processing box body, turning to the next step, and if not, finishing;
s400, generating a starting position and a terminal position of a high-speed movement section of the scraper, and generating a starting position and a terminal position of a low-speed movement section of the scraper;
and S500, controlling the scraper to move according to the starting position and the end position of the high-speed movement interval and the low-speed movement interval.
In an implementation of the present invention, the step S200 of simultaneously translating the part slicing data and the support slicing data of the part specifically includes:
calculating the total length of the gap of the minimum bounding box of each part in the moving direction of the scraper, and calculating the total overlapping depth of the minimum bounding box of each part in the moving direction of the scraper;
if the total length of the gaps is not less than the sum of the total overlapping depth and (N-1) × L, translating each part in the moving direction of the scraper to ensure that the gap between two adjacent parts in the direction vertical to the moving direction of the scraper is L, wherein N is the total number of the parts in the moving direction of the scraper; otherwise, ending.
In one embodiment of the present invention, L is a minimum distance of thermal effect of the laser additive manufacturing process material.
In one implementation of the invention, the value range of L is 8-12 mm.
In one implementation of the present invention, the step S400 generates a start position and an end position of the high-speed movement section of the squeegee, and generates a start position and an end position of the low-speed movement section of the squeegee, specifically:
the edge position of the multi-part integral minimum enclosing box in the moving direction of the output scraper is a scraper low-speed moving interval inside the edge of the multi-part integral minimum enclosing box in the moving direction of the scraper, and a scraper high-speed moving interval outside the forming box body in the moving direction of the scraper.
In one embodiment of the present invention, the position of the edge of the multi-part integrated minimum bounding box in the moving direction of the output scraper further comprises:
if the length of the scraper in the moving direction is greater than the length of the scraper in the direction perpendicular to the moving direction of the scraper in the X axis and the Y axis of the integral minimum bounding box of the multiple parts, and the length of the scraper in the direction perpendicular to the moving direction of the scraper in the X axis and the Y axis of the forming box body is greater than the length of the scraper in the direction perpendicular to the moving direction of the integral minimum bounding box of the multiple parts, all parts are rotated by taking the center of the minimum bounding box as an original point, and the minimum bounding box of the multiple parts does not exceed.
In one embodiment of the present invention, the rotating all the parts with the minimum bounding box center as the origin is specifically:
and rotating the X-Y two-dimensional coordinate system of the processing area by 90 degrees in the forward direction or the reverse direction.
In an implementation of the present invention, the step S500 specifically includes:
in the high-speed movement section, the scraper moves at a first speed; in the low-speed movement interval, the scraper moves at a second speed; wherein the first speed is greater than the second speed;
and accelerating the scraper from the second speed to the first speed from the low-speed movement section to the high-speed movement section in the scraper movement direction.
In one embodiment of the invention, the squeegee is uniformly accelerated from the second speed to the first speed.
According to another aspect of the present invention, there is also provided a multi-part layout optimization processing system for laser additive manufacturing, including a data reading module, a layout optimization module, a bounding box generation module, a motion interval generation module, and a motion control module, wherein:
the data reading module is used for reading X-axis and Y-axis data of the minimum bounding boxes of the parts from all the part slicing files;
the layout optimization module is used for translating the part slicing data and the support slicing data simultaneously to enable the gap between the adjacent two part minimum bounding boxes in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper to be a preset value L, and moving the multi-part integral minimum bounding box to enable the center position of the multi-part integral minimum bounding box to be basically coincident with the center position of the processing box body;
the bounding box generating module is used for generating a multi-part integral minimum bounding box, if the X-axis length of the multi-part integral minimum bounding box is less than the X-axis length of the processing box body, and the Y-axis length of the multi-part integral minimum bounding box is less than the Y-axis length of the processing box body, the moving interval generating module is transferred, and if not, the operation is finished;
the movement section generation module is used for generating the starting position and the end position of the high-speed movement section of the scraper and generating the starting position and the end position of the low-speed movement section of the scraper;
and the motion control module is used for controlling the scraper to move according to the starting position and the end position of the high-speed motion interval and the low-speed motion interval.
Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) the invention directly controls the distance between the parts based on the edge of the minimum bounding box of the parts, does not carry out collision detection and has small calculation load;
(2) the invention not only eliminates the collision (overlapping) between the parts, but also reduces the interval between the parts far away from the movement direction of the scraper. The length of the minimum bounding box of the whole multi-part in the movement direction of the scraper is controlled, and the movement length of the scraper outside a processing area can be increased as much as possible;
(3) the invention also detects and adjusts the direction of the long and wide sides of the minimum bounding box of the whole multi-part, further increases the movement length of the scraper outside the processing area, saves the movement time of the scraper and improves the processing efficiency.
Drawings
FIG. 1 is a schematic flow chart of a multi-part layout optimization machining method for laser additive manufacturing according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a position relationship before the optimized layout of a part according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a position relationship after an optimized layout of a component according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a multi-part overall minimum bounding box, a processing box and a scraper motion area division in an embodiment of the invention;
FIG. 5 is a schematic view of the multi-part unitary minimal bounding box of FIG. 4 after rotation;
fig. 6 is a schematic structural diagram of a multi-part layout optimization processing system for laser additive manufacturing according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The CLI (common Layer interface) format is a laminar file interface proposed and perfected by the BRITE-EURAM rapid prototyping technical project of the European Community, and is realized by combining the specific requirements of a plurality of RP (remote process interface) technologies on the basis of LEAF. The CLI format well processes the inner and outer rings of the layered contour and the corresponding filling line expression in each layer, and has wider adaptability.
The substrate of the processing box body in the laser additive manufacturing is a horizontal plane, the Z axis refers to the direction perpendicular to the substrate in the processing box body, and the X axis, the Y axis and the Z axis are perpendicular to each other in a three-dimensional space.
The bounding box is a simple geometric space containing complex shaped parts. The purpose of adding a bounding box to a part is to perform collision detection quickly or to perform filtering before performing accurate collision detection (i.e., accurate collision detection and processing is performed when the bounding box collides).
In the CLI-format slice file and the SLC-format slice file, bounding boxes are respectively constituted by a minimum value X1 and a maximum value X2 of the X axis, a minimum value Y1 and a maximum value Y2 of the Y axis, a minimum value Z1 and a maximum value Z2 of the Z axis.
In order to solve the problems in the prior art, as shown in fig. 1, the present invention provides a method for optimizing a layout of multiple parts for laser additive manufacturing, including:
s100, reading X-axis and Y-axis data of the minimum bounding box of each part from all part slicing files;
s200, simultaneously translating the part layer cutting data and the support layer cutting data to enable the gap between the adjacent two part minimum bounding boxes in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper to be a preset value L, and moving the multi-part integral minimum bounding box to enable the center position of the multi-part integral minimum bounding box to be basically coincident with the center position of the processing box body;
specifically, after the parts are loaded in batch and matched, gaps between partial parts may be too large, and the intervals between partial parts are too close and even overlap may exist; if the clearance is too large, it increases the time for the blade to move, and if parts are spaced too close together and there may be overlap, it can cause thermal effects during machining to damage the parts. Therefore, the layout of the parts needs to be optimized again, and in order to ensure that the gaps between the parts are not too large and not too close to damage due to thermal effect, the gaps between the parts after the layout is optimized can be set to be L, wherein L is the minimum distance between the thermal effects of the laser additive manufacturing material. Generally, L can range from 8 mm to 12 mm.
The horizontal vertical refers to a direction in the X-Y plane.
In order to implement the above scheme, the following method may be specifically implemented:
calculating the total length of the gap of the minimum bounding box of each part in the moving direction of the scraper, and calculating the total overlapping depth of the minimum bounding box of each part in the moving direction of the scraper;
if the total length of the gaps is not less than the sum of the total overlapping depth and (N-1) × L, translating each part in the moving direction of the scraper to ensure that the gap between two adjacent parts in the direction vertical to the moving direction of the scraper is L, wherein N is the total number of the parts in the moving direction of the scraper; otherwise, ending.
Specifically, as shown in fig. 2, the total length of the gaps between the several parts in the moving direction of the squeegee is L1, and the total depth of the gaps is L2+ L3, so that the distance between the parts after the rearrangement is L, it is necessary to ensure that L1- (L2+ L3) is greater than (N-1) × L, where N is 3. FIG. 3 is a schematic diagram of a part layout after re-optimizing the layout.
After moving each part and carrying out layout optimization, the whole multi-part can no longer be in the center of the processing box body, and at the moment, the position of each part needs to be adjusted to enable the whole minimum bounding box of the multi-part to enable the center position of the whole minimum bounding box of the multi-part to be basically coincided with the center position of the processing box body, so that each part and the scraper are stressed evenly in the processing process, and the processing precision is not influenced.
S300, generating a multi-part overall minimum bounding box, if the X-axis length of the multi-part overall minimum bounding box is smaller than the X-axis length of the processing box body, and the Y-axis length of the multi-part overall minimum bounding box is smaller than the Y-axis length of the processing box body, turning to the next step, and if not, finishing;
further, when the layout is optimized, the overall minimum bounding box of the multiple parts needs to be smaller than the machining box body, and then subsequent machining operation can be carried out, otherwise, the subsequent operation is not carried out and is directly finished. Specifically, the XY length relationship between the minimum bounding box of the entire multi-part and the processing box may be determined.
S400, generating a starting position and a terminal position of a high-speed movement section of the scraper, and generating a starting position and a terminal position of a low-speed movement section of the scraper;
FIG. 4 is a schematic diagram of a multi-part overall minimum bounding box, a processing box and a scraper motion area division; in the drawing, for example, when the blade speed V1 is 25mm/s in the working region, the blade speed V2 is V1X in the non-working region, and X is 3 to 5 in the additive manufacturing of stainless steel (316L) powder material. When V2 is at 80mm/s, the speed has not exceeded the safety margin in mechanical design for mechanical components, including bearings, gears, keys, etc.
In the additive manufacturing equipment with the width (the axial direction of the movement of the scraper) of the forming cylinder being 250mm, the working area of the scraper is 250mm, two sides of the working area are respectively provided with a section of powder falling area and an excess powder pushing area which are about 245mm, and the two sections of the powder falling area and the excess powder pushing area are non-processing areas and can be directly used with V2.
Neglecting the time spent by V1- > V2(131ms), V2- > V1(131ms), and V2 speeds to stop, start to V2, under the limit of motor ramp speed. The more about 30 seconds is required for the scraper to move in a single layer and single direction at a constant speed of V1. The squeegee movement at V1 and V2 in the working area and the non-working area, respectively, takes about 16 s. A single layer may save about 14 seconds in the second motion. According to the processing height of 250mm, the layering thickness is 0.02mm, the number of powder laying layers is 12500, and if the scraper is controlled by the partition movement speed, the total time can be saved by 48 hours.
It is therefore necessary to use more speed of movement in the non-working area during the flight movement as needed to save working time.
Through the first 3 steps, the integral minimum bounding box of the plurality of parts after the layout is optimized is ensured to be positioned in the processing box body, and then the scraper blade can run at a high speed in the integral minimum bounding box of the parts and run at a high speed outside the integral minimum bounding box of the parts. Since an acceleration process is required from a lower speed to a higher speed, the area between the processing box and the minimum enclosure of the whole part can be used as an acceleration area.
Specifically, the method comprises the following steps: the edge position of the multi-part integral minimum enclosing box in the moving direction of the output scraper is a scraper low-speed moving interval inside the edge of the multi-part integral minimum enclosing box in the moving direction of the scraper, and a scraper high-speed moving interval outside the forming box body in the moving direction of the scraper.
Further, it is possible that, as shown in fig. 4, if the length of the multi-part overall minimum bounding box in the direction of the movement of the squeegee is shorter than the length of the multi-part overall minimum bounding box in the direction perpendicular to the direction of the movement of the squeegee, the multi-part overall minimum bounding box (i.e., the part area) can be rotated, and as shown in fig. 5 after the rotation, the length of the multi-part overall minimum bounding box in the direction of the movement of the squeegee is longer than the length of the multi-part overall minimum bounding box in the direction perpendicular to the direction of the.
Specifically, the above scheme can be implemented as follows: if the length of the scraper in the moving direction is larger than the length of the scraper in the direction perpendicular to the moving direction of the scraper in the X axis and the Y axis of the integral minimum bounding box of the multiple parts, and the length of the scraper in the X axis and the Y axis of the forming box body in the direction perpendicular to the moving direction of the scraper in the integral minimum bounding box of the multiple parts is larger than the length of the scraper in the moving direction of the scraper in the integral minimum bounding box of the multiple parts (ensuring that the integral minimum bounding box of the multiple parts does not exceed the processing box body after rotation), all parts are rotated by taking the center of the minimum bounding box as an.
Further, the rotation mode may be: and rotating the X-Y two-dimensional coordinate system of the processing area by 90 degrees in the forward direction or the reverse direction.
And S500, controlling the scraper to move according to the starting position and the end position of the high-speed movement interval and the low-speed movement interval.
To save machining time and improve machining efficiency, the workpiece may be run at a higher speed within the overall minimum enclosure of the workpiece and at a higher speed outside the overall minimum enclosure of the workpiece.
Specifically, the method comprises the following steps: in the high-speed movement section, the scraper moves at a first speed; in the low-speed movement interval, the scraper moves at a second speed; wherein the first speed is greater than the second speed;
and accelerating the scraper from the second speed to the first speed from the low-speed movement section to the high-speed movement section in the scraper movement direction.
Preferably, the acceleration process can be uniform acceleration, so that the acceleration stability is ensured, and the service life of the scraper is prolonged.
Further, as shown in fig. 6, the present invention also provides a multi-part layout optimization processing system for laser additive manufacturing, including a data reading module, a layout optimization module, a bounding box generation module, a motion interval generation module, and a motion control module, wherein:
the data reading module is used for reading X-axis and Y-axis data of the minimum bounding boxes of the parts from all the part slicing files;
the layout optimization module is used for translating the part slicing data and the support slicing data simultaneously to enable the gap between the adjacent two part minimum bounding boxes in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper to be a preset value L, and moving the multi-part integral minimum bounding box to enable the center position of the multi-part integral minimum bounding box to be basically coincident with the center position of the processing box body;
the bounding box generating module is used for generating a multi-part integral minimum bounding box, if the X-axis length of the multi-part integral minimum bounding box is less than the X-axis length of the processing box body, and the Y-axis length of the multi-part integral minimum bounding box is less than the Y-axis length of the processing box body, the moving interval generating module is transferred, and if not, the operation is finished;
the movement section generation module is used for generating the starting position and the end position of the high-speed movement section of the scraper and generating the starting position and the end position of the low-speed movement section of the scraper;
and the motion control module is used for controlling the scraper to move according to the starting position and the end position of the high-speed motion interval and the low-speed motion interval.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A multi-part layout optimization machining method for laser additive manufacturing is characterized by comprising the following steps:
s100, reading X-axis and Y-axis data of the minimum bounding box of each part from all part slicing files;
s200, simultaneously translating the part layer cutting data and the support layer cutting data to enable the gap between the minimum bounding boxes of the two adjacent parts in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper to be a preset value L, wherein the L is the minimum distance of the heat effect of the laser additive manufacturing material;
s300, generating a multi-part overall minimum bounding box, if the X-axis length of the multi-part overall minimum bounding box is smaller than the X-axis length of the processing box body, and the Y-axis length of the multi-part overall minimum bounding box is smaller than the Y-axis length of the processing box body, turning to the next step, and if not, finishing;
s400, moving the multi-part integral minimum bounding box to enable the center position of the multi-part integral minimum bounding box to be basically overlapped with the center position of the processing box body, generating the starting position and the end position of a high-speed movement section of the scraper, and generating the starting position and the end position of a low-speed movement section of the scraper;
and S500, controlling the scraper to move according to the starting position and the end position of the high-speed movement interval and the low-speed movement interval.
2. The multi-part layout optimization processing method for laser additive manufacturing according to claim 1, wherein a value of L ranges from 8 mm to 12 mm.
3. The method for optimizing the layout of multiple parts for laser additive manufacturing according to claim 1 or 2, wherein the step S400 generates a start position and an end position of a high-speed movement section of the blade, and generates a start position and an end position of a low-speed movement section of the blade, specifically:
the edge position of the multi-part integral minimum enclosing box in the motion direction of the output scraper is a scraper low-speed motion interval inside the edge of the multi-part integral minimum enclosing box in the motion direction of the scraper, and a scraper high-speed motion interval outside the processing box body in the motion direction of the scraper.
4. The method for optimizing the layout of multiple parts for laser additive manufacturing of claim 3, wherein the position of the edge of the minimum bounding box of the multiple parts in the moving direction of the output scraper further comprises:
if the length of the scraper in the moving direction is greater than the length of the scraper in the direction perpendicular to the moving direction of the scraper in the X axis and the Y axis of the multi-part integral minimum bounding box, and the length of the scraper in the direction perpendicular to the moving direction of the scraper in the X axis and the Y axis of the processing box body is greater than the length of the scraper in the direction perpendicular to the moving direction of the multi-part integral minimum bounding box, all parts are rotated by taking the center of the multi-part integral minimum bounding box as an original point, and the multi-part integral minimum bounding box is translated to ensure.
5. The method for optimally machining the layout of the multiple parts for laser additive manufacturing according to claim 4, wherein rotating all the parts with the center of the minimum bounding box of the whole multiple parts as an origin is specifically as follows:
and rotating the X-Y two-dimensional coordinate system of the processing area by 90 degrees in the forward direction or the reverse direction.
6. The method for optimized processing of a layout of multiple parts for laser additive manufacturing according to claim 1 or 2, wherein the step S500 is specifically:
in the high-speed movement section, the scraper moves at a first speed; in the low-speed movement interval, the scraper moves at a second speed; wherein the first speed is greater than the second speed;
and accelerating the scraper from the second speed to the first speed from the low-speed movement section to the high-speed movement section in the scraper movement direction.
7. The method of multi-part layout-optimized machining for laser additive manufacturing of claim 6, wherein the blade is uniformly accelerated from the second speed to the first speed.
8. A multi-part layout optimization processing system for laser additive manufacturing comprises a data reading module, a layout optimization module, a bounding box generation module, a motion interval generation module and a motion control module, wherein:
the data reading module is used for reading X-axis and Y-axis data of the minimum bounding boxes of the parts from all the part slicing files;
the layout optimization module is used for translating the part layer cutting data and the support layer cutting data simultaneously, so that the gap between the minimum bounding boxes of the two adjacent parts in the movement direction of the scraper or in the direction horizontally vertical to the movement direction of the scraper is a preset value L, and the L is the minimum interval of the heat effect of the laser additive manufacturing material;
the bounding box generating module is used for generating a multi-part integral minimum bounding box, if the X-axis length of the multi-part integral minimum bounding box is less than the X-axis length of the processing box body, and the Y-axis length of the multi-part integral minimum bounding box is less than the Y-axis length of the processing box body, the moving interval generating module is transferred, and if not, the operation is finished;
the movement interval generation module is used for moving the multi-part integral minimum bounding box to enable the center position of the minimum bounding box to be basically superposed with the center position of the processing box body, generating the starting position and the end position of a high-speed movement interval of the scraper and generating the starting position and the end position of a low-speed movement interval of the scraper;
and the motion control module is used for controlling the scraper to move according to the starting position and the end position of the high-speed motion interval and the low-speed motion interval.
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