CN115138870A - Multi-galvanometer splicing printing system and multi-galvanometer splicing printing method - Google Patents

Multi-galvanometer splicing printing system and multi-galvanometer splicing printing method Download PDF

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Publication number
CN115138870A
CN115138870A CN202110354694.9A CN202110354694A CN115138870A CN 115138870 A CN115138870 A CN 115138870A CN 202110354694 A CN202110354694 A CN 202110354694A CN 115138870 A CN115138870 A CN 115138870A
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China
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boundary
scanning
overlapping area
galvanometer
printing
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CN202110354694.9A
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Chinese (zh)
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CN115138870B (en
Inventor
刘建业
牛留辉
余胤鎏
黄玉生
陈思敏
赵崇亮
梁自品
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Guangdong Hanbang3d Technology Co ltd
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Guangdong Hanbang3d Technology Co ltd
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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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/003—Apparatus, e.g. furnaces
    • 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
    • B33Y10/00—Processes of additive manufacturing
    • 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
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

A multi-galvanometer splicing printing system comprises a control device, a plurality of laser emitting devices and a plurality of scanning galvanometer devices which correspond to the laser emitting devices respectively, wherein each scanning galvanometer device is provided with a scanning area, an overlapping area is formed among the scanning areas, the overlapping area at least partially extends to the edge of an area to be printed, the control device is used for controlling laser beams emitted by the laser emitting devices to pass through the scanning galvanometer devices and then scan and print the area corresponding to the overlapping area on the area to be printed along a preset path corresponding to the overlapping area, and the boundary of the preset path corresponding to the overlapping area on each printing layer randomly changes within a preset range outside the boundary of the overlapping area. The invention also provides a multi-galvanometer splicing printing method.

Description

Multi-galvanometer splicing printing system and multi-galvanometer splicing printing method
Technical Field
The invention relates to the technical field of 3D laser printing and forming, in particular to a multi-galvanometer splicing and printing system and a multi-galvanometer splicing and printing method.
Background
The 3D laser printing technique is a technique of forming by completely melting metal powder under the heat of a laser beam and cooling and solidifying. In the laser printing process, when the printing range of the galvanometer is smaller than the range to be printed, the multi-galvanometer printing is required. In the multi-galvanometer printing process, the overlapping areas among the galvanometers are fixed, so that the edges of the overlapping areas on a plurality of printing layers are always in the same vertical position, and a printed molded product has a linear printing boundary and the appearance and the quality of the product are influenced.
Disclosure of Invention
In view of this, it is desirable to provide a multi-galvanometer stitching printing system and a multi-galvanometer stitching printing method, which can make the product have an attractive appearance and do not affect the quality of the product.
A multi-galvanometer splicing printing system comprises a control device, a plurality of laser emitting devices and a plurality of scanning galvanometer devices which correspond to the laser emitting devices respectively, wherein each scanning galvanometer device is provided with a scanning area, an overlapping area is formed among the scanning areas, the overlapping area at least partially extends to the edge of an area to be printed, the control device is used for controlling laser beams emitted by the laser emitting devices to pass through the scanning galvanometer devices and then scan and print the area corresponding to the overlapping area on the area to be printed along a preset path corresponding to the overlapping area, and the boundary of the preset path corresponding to the overlapping area on each printing layer randomly changes within a preset range outside the boundary of the overlapping area.
A multi-galvanometer splicing printing method comprises the steps of controlling a plurality of laser beams to scan and print an area corresponding to an overlapping area on an area to be printed along a preset path corresponding to the overlapping area through a control device, wherein the overlapping area is an overlapping part of a plurality of scanning areas corresponding to a plurality of scanning galvanometer devices, the overlapping area at least partially extends to the edge of the area to be printed, and the boundary of the preset path corresponding to the overlapping area on each printing layer randomly changes within a preset range outside the boundary of the overlapping area.
According to the multi-galvanometer splicing printing system and the multi-galvanometer splicing printing method, the areas corresponding to the overlapping areas on the to-be-printed areas are printed through the laser beams, the boundary of the preset path corresponding to the overlapping areas on each printing layer randomly changes within the preset range outside the boundary of the overlapping areas, the printing boundary corresponding to the overlapping areas randomly changes on each printing layer, the overlapping areas of the printing layers are not completely overlapped in the direction perpendicular to the workpiece, no linear trace appears in the direction perpendicular to the workpiece, the appearance of a product is attractive, and the printing quality of the workpiece is improved.
Drawings
FIG. 1 is a schematic diagram of a multi-galvanometer stitching printing system.
Fig. 2 is a schematic diagram illustrating scanning printing of an overlapping area according to an embodiment.
Fig. 3 is a schematic view illustrating scan printing of an overlap area according to another embodiment.
Fig. 4 is a schematic view of alternate printing of overlapping areas.
FIG. 5 is a flow chart of a multi-galvanometer stitching printing method.
Description of the main elements
Multi-galvanometer splicing printing system 100
Control device 10
Laser emitting device 20
Laser beam 20a、20b、20c、20d
Scanning galvanometer device 30
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides a multi-galvanometer stitching printing system 100, wherein the multi-galvanometer stitching printing system 100 is used for workpiece forming. The multi-galvanometer stitching printing system 100 includes a control device 10, a plurality of laser emitting devices 20, and a plurality of scanning galvanometer devices 30 corresponding to the plurality of laser emitting devices 20, respectively. Each scanning galvanometer device 30 has a scanning area, and the set of a plurality of scanning areas includes a region to be printed. The control device 10 is connected to all the laser emitting devices 20 and the scanning galvanometer device 30, and is configured to control the laser emitting devices 20 to emit laser beams and the scanning galvanometer devices 30 to move, so that the laser beams melt metal powder on the processing platform after passing through the scanning galvanometer devices 30 and form a printing layer of a workpiece to be formed after cooling.
When printing to the area corresponding to the overlap area on the area to be printed, the control device 10 controls the laser emitting devices 20 corresponding to the scanning areas related to the overlap area to emit laser beams through the corresponding scanning galvanometer device 30, and then performs scanning printing to the area corresponding to the overlap area on the area to be printed along the preset path corresponding to the overlap area, wherein the boundary of the preset path corresponding to the overlap area on each printing layer randomly changes within the preset range outside the boundary of the overlap area. Therefore, the printing boundaries corresponding to the overlapping areas randomly change in each printing layer, the overlapping areas of the printing layers are not completely overlapped in the direction perpendicular to the workpiece, no linear trace appears in the direction perpendicular to the workpiece, the appearance of the product is attractive, and the printing quality of the workpiece is improved.
Specifically, in one embodiment, as shown in fig. 2, the overlapping area includes a first overlapping area fbed formed by two scanning areas abed and fbcd arranged in the scanning direction, the two scanning areas abed and fbcd are respectively scanning ranges of the laser beams emitted by the two laser emission devices 20 on the to-be-printed area after passing through the two scanning galvanometer devices 30, the first overlapping area fbed includes a first boundary e and a second boundary f arranged in the scanning direction, the first boundary e and the second boundary f intersect with boundaries b and d of the to-be-printed area abcd, and the boundary connected between the first boundary e and the second boundary f is located on the boundaries b and d of the to-be-printed layer abc. When the control device 10 controls the laser beam emitted by the corresponding laser emitting device 20 to scan and print each printing layer, two end points of a preset path corresponding to the same position between the first boundary e and the second boundary f on each printing layer are respectively outside the first boundary e and the second boundary f, and the distance between the end point and the corresponding first boundary e or second boundary f randomly changes within the preset range. In this way, no linear trace appears on the workpiece in the direction perpendicular to the workpiece at the intersection with the first boundary and the second boundary. It is to be understood that the boundary line of the overlapping area is not limited to the straight line shown in fig. 2, but may be a diagonal line or an arc line or an irregular curve.
In another embodiment, as shown in fig. 3, the region to be printed corresponds to a set of four scanning areas, and correspondingly, the multi-galvanometer stitching printing system 100 includes four scanning galvanometer devices 30 and four laser emitting devices 20 corresponding to the four scanning galvanometer devices 30, so as to complete the printing of the workpiece by four laser beams. The four scanning areas are areas consisting of ahed, fhcd, abeg and fbcg. The overlapping area includes a first overlapping area fbed formed by two sets of scanning areas ahed, fhcd, abeg and fbcg arranged in the scanning direction, and also includes a second overlapping area ahcg formed by two sets of scanning areas ahed, abeg and fhcd and fbcg arranged in the direction perpendicular to the scanning direction. The second overlapping area ahcg includes a third boundary g and a fourth boundary h, which intersect with the boundaries a, c of the layer to be printed. The control device 10 controls the laser beam emitted by the corresponding laser emitting device 20 to scan-print each print layer, and the boundary of the scanning width corresponding to the second overlapping area in the direction perpendicular to the scanning direction randomly varies within the preset range outside the boundary of the second overlapping area. In this way, no linear trace appears on the workpiece in the direction perpendicular to the workpiece at the intersection with the third boundary and the fourth boundary.
In one embodiment, the scan width corresponding to the second overlap region in the direction perpendicular to the scan direction is adjusted by the number of scans of the laser beam when scanning the region corresponding to the third boundary and the fourth boundary. For example, the number of scans for the third and fourth boundaries on one print layer is 2, and the number of scans for the third and fourth boundaries on another print layer is 3. In this way, the actual scanning widths of the overlapped areas on the two printing layers in the direction perpendicular to the workpiece are not at the same position, so that no linear trace appears in the overlapped areas on the printing layers in the direction perpendicular to the workpiece. Further, the number of scans for printing the third boundary and the fourth boundary on the same print layer may also be different.
In another embodiment, the spot size of the laser beam used for printing is adjusted when the scanning width corresponding to the second overlap region in the direction perpendicular to the scanning direction is scanned by printing the regions corresponding to the third boundary and the fourth boundary. When the positions corresponding to the third boundary and the fourth boundary are printed on a printing layer, the width of a light spot of a laser beam for scanning printing in the direction vertical to the scanning direction is 0.1mm; when another printing layer prints the positions corresponding to the third boundary and the fourth boundary, the width of the light spot of the laser beam for scanning printing in the direction perpendicular to the scanning direction is 0.2mm. Further, the size of the spot of the laser beam used for printing the third boundary and the fourth boundary may also be different in the same printing layer.
When printing is performed on the region corresponding to the overlap region on the region to be printed, the plurality of laser beams emitted by the corresponding plurality of laser emitting devices 20 may be synchronously and alternately printed, or the plurality of laser beams emitted by the corresponding plurality of laser emitting devices 20 may be asynchronously and alternately printed. As shown in fig. 4, when the control device 10 divides the overlap area into a plurality of sub-printing areas and synchronously and alternately prints the overlap area, taking the overlap area fheg shown in fig. 3 as an example, the overlap area fheg is printed by four laser beams 20a, 20b, 20c, 20d emitted by four laser emitting devices 20 sequentially and simultaneously on adjacent sub-printing areas of the overlap area until the overlap area is printed. When asynchronous alternate printing is performed on the overlapped area, the laser beam 20a scans a plurality of sub-printing areas at intervals, and then the laser beams 20b, 20c, and 20d sequentially scan the remaining sub-printing areas at intervals. Further, when the overlapping area is alternately printed in synchronization by the plurality of laser beams, the scanning directions of the plurality of laser beams may be coincident or may include two opposite directions. Taking fig. 4 as an example, when the four laser beams 20a, 20b, 20c, 20d print the area corresponding to the overlap area on the area to be printed, the scanning directions of the four laser beams 20a, 20b, 20c, 20d may all be the first direction, or the laser beams 20a, 20b scan and print in the first direction, and the laser beams 20c, 20d scan and print in the second direction. In one embodiment, when the overlapping area is alternately printed by a plurality of laser beams in synchronization and the scanning directions of the plurality of laser beams coincide, the scanning direction is opposite to the direction of wind for purifying smoke generated at the time of laser beam printing.
Referring to fig. 5, the method for splicing and printing multiple galvanometers according to the present invention includes the following steps.
Step S1: a plurality of laser emitting devices 20 for emitting laser beams are provided.
Step S2: a plurality of scanning galvanometer devices 30 corresponding to the plurality of laser emitting devices 20 are provided, each scanning galvanometer device 30 is provided with a scanning area, the scanning areas are provided with overlapping areas, and the set of the scanning areas comprises an area to be printed.
And step S3: the control device 10 controls the plurality of laser beams to scan and print the area corresponding to the overlap area on the area to be printed along the preset path corresponding to the overlap area, wherein the overlap area at least partially extends to the edge of the area to be printed, and the boundary of the preset path corresponding to the overlap area on each printing layer randomly changes within a preset range outside the boundary of the overlap area.
In one embodiment, the overlap region includes a first overlap region formed by a plurality of scan regions arranged in the scan direction, the first overlap region includes a first boundary and a second boundary arranged in the scan direction, the first boundary and the second boundary intersect with a boundary of the region to be printed, and a boundary connected between the first boundary and the second boundary is located on a boundary of the layer to be printed. When the laser beam scans and prints each printing layer, two end points of a preset path corresponding to the same position between the first boundary and the second boundary on each printing layer are respectively outside the first boundary and the second boundary, and the distance between the end points and the corresponding first boundary or second boundary randomly changes within the preset range.
In another embodiment, the overlap region includes a second overlap region formed by a plurality of scan regions arranged in a direction perpendicular to the scan direction, the second overlap region includes a third boundary and a fourth boundary, the third boundary and the fourth boundary intersect with a boundary of the layers to be printed, and a boundary of a scan width corresponding to the second overlap region in the direction perpendicular to the scan direction randomly varies within the preset range outside the boundary of the second overlap region when the laser beam performs scan printing on each print layer.
In one embodiment, the scan width corresponding to the second overlap region in the direction perpendicular to the scan direction is adjusted by the number of scans of the laser beam when scanning the region corresponding to the third boundary and the fourth boundary. In another embodiment, the spot size of the laser beam used for printing is adjusted when the scanning width corresponding to the second overlap region in the direction perpendicular to the scanning direction is scanned by printing the regions corresponding to the third boundary and the fourth boundary.
According to the multi-galvanometer splicing printing system 100 and the multi-galvanometer splicing printing method, the areas corresponding to the overlapping areas on the area to be printed are printed through the laser beams, the boundary of the preset path corresponding to the overlapping area on each printing layer is randomly changed within the preset range outside the boundary of the overlapping area, the printing boundary corresponding to the overlapping area is randomly changed on each printing layer, the overlapping areas of the printing layers are not completely overlapped in the direction perpendicular to the workpiece, no trace is linear in the direction perpendicular to the workpiece, the appearance of the product is attractive, and the printing quality of the workpiece is improved.
It will be appreciated by those skilled in the art that the above embodiments are illustrative only and not intended to be limiting, and that suitable modifications and variations to the above embodiments are within the scope of the disclosure provided that the invention is not limited thereto.

Claims (10)

1. A multi-galvanometer splicing printing system comprises a control device, a plurality of laser emitting devices and a plurality of scanning galvanometer devices which correspond to the laser emitting devices respectively, wherein each scanning galvanometer device is provided with a scanning area.
2. The multi-galvanometer splicing printing system according to claim 1, wherein the overlapping area comprises a first overlapping area formed by a plurality of scanning areas arranged in the scanning direction, the first overlapping area comprises a first boundary and a second boundary arranged in the scanning direction, the first boundary and the second boundary intersect with the boundary of the area to be printed, when the control device controls the laser beam emitted by the corresponding laser emitting device to scan and print each printing layer, two end points of a preset path corresponding to the same position between the first boundary and the second boundary on each printing layer are respectively outside the first boundary and the second boundary, and the distance between the end points and the corresponding first boundary or second boundary randomly varies within the preset range.
3. The multi-galvanometer stitching printing system according to claim 1, wherein the overlapping area includes a second overlapping area formed by a plurality of scanning areas arranged in a direction perpendicular to the scanning direction, the second overlapping area includes a third boundary and a fourth boundary, the third boundary and the fourth boundary intersect with a boundary of the layer to be printed, and the control device controls the laser beam emitted by the corresponding laser emitting device to perform scanning printing on each printing layer such that a boundary of a scanning width corresponding to the second overlapping area in the direction perpendicular to the scanning direction randomly varies within the preset range outside the boundary of the second overlapping area.
4. The multi-galvanometer stitching printing system of claim 3, wherein a scan width corresponding to the second overlap region in a direction perpendicular to the scan direction is adjusted by a number of scans of the laser beam while scanning the printed region corresponding to the third boundary and the fourth boundary.
5. The multi-galvanometer tiled printing system of claim 3, wherein a scan width corresponding to the second overlap area in a direction perpendicular to the scan direction is adjusted by a spot size of a laser beam used for printing when scanning to print an area corresponding to the third boundary and the fourth boundary.
6. A multi-galvanometer splicing printing method is characterized in that a control device controls a plurality of laser beams to scan and print an area corresponding to an overlapping area on a to-be-printed area along a preset path corresponding to the overlapping area, wherein the overlapping area is an overlapping part of a plurality of scanning areas corresponding to a plurality of scanning galvanometer devices, the overlapping area at least partially extends to the edge of the to-be-printed area, and the boundary of the preset path corresponding to the overlapping area on each printing layer randomly changes within a preset range outside the boundary of the overlapping area.
7. The multi-galvanometer stitching printing method according to claim 6, wherein the overlapping area comprises a first overlapping area formed by a plurality of scanning areas arranged in the scanning direction, the first overlapping area comprises a first boundary and a second boundary arranged in the scanning direction, the first boundary and the second boundary intersect with the boundary of the area to be printed, when the laser beam scans and prints each printing layer, two end points of a preset path corresponding to the same position between the first boundary and the second boundary on each printing layer are respectively outside the first boundary and the second boundary, and the distance between the end points and the corresponding first boundary or second boundary randomly varies within the preset range.
8. The multi-galvanometer stitching printing method according to claim 6, wherein the overlapping area includes a second overlapping area formed by a plurality of scanning areas arranged in a direction perpendicular to the scanning direction, the second overlapping area includes a third boundary and a fourth boundary, the third boundary and the fourth boundary intersect with a boundary of the layer to be printed, and a boundary of a scanning width corresponding to the second overlapping area in the direction perpendicular to the scanning direction randomly varies within the preset range outside the boundary of the second overlapping area when the laser beam performs scanning printing on each printing layer.
9. The multi-galvanometer stitching printing method of claim 8, wherein a scan width corresponding to the second overlap region in a direction perpendicular to the scan direction is adjusted by a number of scans of the laser beam while scanning the region printed corresponding to the third boundary and the fourth boundary.
10. The multi-galvanometer stitching printing method according to claim 8, wherein the scanning width corresponding to the second overlapping area in the direction perpendicular to the scanning direction is adjusted by a spot size of the laser beam used for printing when scanning the area corresponding to the third boundary and the fourth boundary.
CN202110354694.9A 2021-03-31 2021-03-31 Multi-vibrating mirror spliced printing system and multi-vibrating mirror spliced printing method Active CN115138870B (en)

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