CN113399824A - Multi-partition redundancy scanning method - Google Patents
Multi-partition redundancy scanning method Download PDFInfo
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- CN113399824A CN113399824A CN202110679895.6A CN202110679895A CN113399824A CN 113399824 A CN113399824 A CN 113399824A CN 202110679895 A CN202110679895 A CN 202110679895A CN 113399824 A CN113399824 A CN 113399824A
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- scanning
- laser
- forming
- laser scanning
- galvanometer systems
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005192 partition Methods 0.000 title claims abstract description 17
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- 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
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a multi-partition redundant scanning method, wherein at least two laser scanning galvanometer systems are arranged above a forming chamber, laser beams of the at least two laser scanning galvanometer systems respectively carry out full-coverage scanning on a forming area of the forming chamber, the invention carries out full-coverage scanning on the same scanning area through the plurality of laser scanning galvanometer systems to form multiple redundant scanning, thus the scanning efficiency is greatly improved, part of galvanometers in the same scanning area are damaged without influencing the operation of the system, the rest undamaged galvanometers in the scanning area can continuously work without shutdown replacement or maintenance of the galvanometers, the processing efficiency and the system stability are greatly improved, the restarting processing after shutdown maintenance is avoided, the processing precision is effectively improved, and the processing efficiency is further improved by partitioning the forming area.
Description
Technical Field
The invention relates to the technical field of 3D laser printing, in particular to a multi-partition redundancy scanning method.
Background
In various laser scanning technologies, an SLM is a laser scanning technology widely used at present, in a conventional SLM technology, a single laser scanning galvanometer system scans and processes powder in a whole forming area, and for a workpiece with a large size, the processing efficiency is low, so in order to improve the processing efficiency, a mode of adopting a high-efficiency galvanometer system at present is adopted, and the processing efficiency is improved by improving the laser scanning efficiency, so that the efficiency increasing capability is limited, and the high-efficiency galvanometer system is expensive and difficult to be widely used;
when the laser beam of a single laser scanning galvanometer system is used for processing a forming area, once the galvanometer of the laser scanning galvanometer system is damaged, scanning processing cannot be continuously carried out, the galvanometer needs to be replaced or maintained in a shutdown mode, and the galvanometer is restarted for processing after being replaced or maintained, so that the processing efficiency is reduced, and processing errors can occur after restarting, and the processing precision is influenced.
Disclosure of Invention
In order to make up for the defects, the invention provides a multi-partition redundant scanning method, which carries out multiple redundant full-coverage scanning on the forming area of the forming chamber through a plurality of laser scanning galvanometer systems, thereby improving the forming efficiency and the system operation reliability.
The technical scheme adopted by the invention for solving the technical problem is as follows: a multi-partition redundant scanning method is characterized in that at least two laser scanning galvanometer systems are arranged above a forming chamber, and laser beams of the at least two laser scanning galvanometer systems respectively carry out full-coverage scanning on a forming area of the forming chamber.
The laser beams of at least two laser scanning galvanometer systems simultaneously carry out full-coverage scanning on the same forming area to form at least twice redundant multi-beam full-coverage scanning, the forming efficiency is improved, the laser galvanometer can continue to work as long as one laser galvanometer is not damaged, the system operation cannot be influenced, the reliability is greatly improved, the laser galvanometer is allowed to be damaged, the laser galvanometer is not completely damaged simultaneously, part of the laser galvanometer is damaged, the system can continue to work, the laser galvanometer can be replaced or maintained when the equipment does not work, the damaged laser galvanometer can be directly disassembled, replaced or maintained under the condition of no shutdown, and the processing efficiency is favorably improved.
As a further improvement of the invention, a forming area of the forming chamber is divided to form at least one independent scanning subarea, laser scanning galvanometer systems above the forming chamber are grouped to form at least one group of laser scanning galvanometer systems, each group of laser scanning galvanometer systems consists of at least two laser scanning galvanometer systems, each group of laser scanning galvanometer systems corresponds to one independent scanning subarea, and laser beams of all the laser scanning galvanometer systems in each group of laser scanning galvanometer systems respectively carry out full-coverage scanning on the same independent scanning subarea.
Adopt laser scanning to add man-hour, each laser scanning mirror system that shakes among every group laser scanning mirror system that shakes corresponds an independent scanning subregion and carries out the full coverage scanning, multiunit laser scanning mirror system that shakes is scanned different independent scanning subregions in step, the scanning area that every group laser scanning mirror system that shakes's laser beam corresponds is little, scanning efficiency is high, the multiple improvement of machining efficiency has been realized, can realize large-scale and super large-scale work piece rapid machining shaping, the shaping district of shaping room can be divided into 2, 3 or more independent scanning subregions, realize rapid scanning processing, also can not carry out the subregion, each laser scanning mirror system that shakes carries out the full coverage scanning to the whole shaping district of shaping room.
As a further improvement of the invention, the scannable range of the laser beam of each laser scanning galvanometer system is larger than the corresponding scanning subarea range, and the scanning areas of two adjacent groups of laser scanning galvanometer systems are crossed and overlapped at the boundary. The laser beam scanning ranges of the laser scanning galvanometer systems of all groups are overlapped in a crossed mode through boundaries to ensure that all point positions in all the subareas can be scanned, and scanning blind areas are avoided.
As a further improvement of the invention, the scanning subareas in the forming area of the forming chamber are arranged in an array state in a seamless connection mode.
As a further improvement of the invention, each group of laser scanning galvanometer systems consists of 2-3 laser scanning galvanometer systems. Or the laser scanning galvanometer system can be more on the right, and the number can be selected according to the requirement.
As a further improvement of the invention, a forming opening is formed on the bottom surface of the lower end of the forming chamber, a forming cylinder is hermetically inserted in the forming opening, and a forming area is formed in the inner area of a forming cavity of the forming cylinder. And the laser beam of the laser scanning galvanometer system scans and processes the upper layer powder on the inner side of the forming cylinder.
The beneficial technical effects of the invention are as follows: the invention forms multiple redundant scanning by arranging a plurality of laser scanning galvanometer systems above the forming chamber, wherein the laser scanning galvanometer systems carry out full-coverage scanning on the same scanning area, so that the scanning efficiency is greatly improved, the damage of part of galvanometers in the same scanning area does not influence the operation of the system, the rest galvanometers without damage in the scanning area can continue to work without shutdown replacement or maintenance of the galvanometers, the processing efficiency and the system stability are greatly improved, the restarting processing after shutdown maintenance is avoided, and the processing precision is effectively improved. Further improving the processing efficiency.
Drawings
FIG. 1 is a schematic diagram of a conventional single-beam laser scanning method;
FIG. 2 is a schematic diagram of a dual-zone dual-beam laser scanning method;
FIG. 3 is a schematic diagram of a dual-beam laser redundant scanning method according to the present invention;
FIG. 4 is a schematic diagram of a three-beam laser redundant scanning method according to the present invention;
FIG. 5 is a schematic diagram of a dual-zone dual-beam laser redundancy scanning method according to the present invention;
FIG. 6 is a schematic diagram of the two regions of the present invention.
Forming chamber-1 laser beam-2 forming cylinder-3
Piston-4 piston rod-5 forming cavity-6
First independent scanning zone-7 second independent scanning zone-8
First set of laser beam scan regions- - -9
Second set of laser beam scan regions 10
Detailed Description
Example 1: a forming opening is formed in the bottom surface of the lower end of a forming chamber 1, a forming cylinder 3 is inserted in the forming opening in a sealing mode, a forming cavity 6 is formed by the side wall of the forming cylinder and a piston together, a forming area is formed in the area inside the forming cavity 6, a piston rod drives the piston to slightly descend to spread powder layer by layer, the forming area is not partitioned, two laser scanning galvanometer systems are arranged above the forming chamber 1, laser beams 2 of the two laser scanning galvanometer systems respectively conduct full-coverage scanning on the forming area of the forming chamber, a two-time redundant double-beam full-coverage scanning system is formed, the mode not only improves forming efficiency, but also enables one galvanometer to continue to work when the galvanometer is damaged, and the running reliability of the system is improved.
Example 2: a forming opening is formed in the bottom surface of the lower end of a forming chamber 1, a forming cylinder 3 is inserted in the forming opening in a sealing mode, a forming cavity 6 is formed by the side wall of the forming cylinder and a piston together, a forming area is formed in the area on the inner side of the forming cavity 6, the piston rod drives the piston to descend inching to spread powder layer by layer, the forming area is not partitioned, three laser scanning galvanometer systems are arranged above the forming chamber 1, laser beams 2 of the three laser scanning galvanometer systems respectively conduct full-coverage scanning on the forming area of the forming chamber, a triple redundant three-beam full-coverage scanning system is formed, the mode not only improves forming efficiency, but also enables two galvanometers to work continuously when the laser beams are broken, and the running reliability of the system is improved.
Example 3: a multi-partition redundant scanning method is characterized in that a forming opening is formed in the bottom surface of the lower end of a forming chamber 1, a forming cylinder 3 is inserted in the forming opening in a sealing mode, a forming cavity 6 is formed by the side wall of the forming cylinder and a piston together, a forming area is formed in the area inside the forming cavity 6, the piston rod drives the piston to descend in an inching mode to spread powder layer by layer, the forming area is divided into a first independent scanning partition 7 and a second independent scanning partition 8, laser scanning galvanometer systems above the forming chamber are grouped to form a first group of laser scanning galvanometer systems and a second group of laser scanning galvanometer systems, the first group of laser scanning galvanometer systems are composed of two laser scanning galvanometer systems, the first group of laser scanning galvanometer systems corresponds to the first independent scanning partition 7, the second group of laser scanning galvanometer systems is composed of two laser scanning galvanometer systems, the second group of laser scanning galvanometer systems corresponds to the second independent scanning partition 8, the laser beam scanning area 9 of the first group of laser scanning galvanometer system is larger than the range of a first independent scanning subarea 7, the laser beam scanning area 10 of the second group of laser scanning galvanometer system is larger than the range of a second independent scanning subarea 8, the scanning areas of the first group of laser scanning galvanometer system and the second group of laser scanning galvanometer system are overlapped in a crossing way at the adjacent boundary of the two scanning subareas, the laser beams of the two laser scanning galvanometer systems in the first group of laser scanning galvanometer system carry out full-coverage scanning on the first independent scanning subarea 7, and the laser beams of the two laser scanning galvanometer systems in the second group of laser scanning galvanometer system carry out full-coverage scanning on the second independent scanning subarea 8.
Claims (6)
1. A multi-partition redundancy scanning method is characterized in that: at least two laser scanning galvanometer systems are arranged above the forming chamber (1), and laser beams (2) of the at least two laser scanning galvanometer systems respectively carry out full-coverage scanning on a forming area of the forming chamber.
2. The multi-partition redundancy scanning method of claim 1, wherein: the forming area of the forming chamber is divided to form at least one independent scanning subarea, the laser scanning galvanometer systems above the forming chamber are grouped to form at least one group of laser scanning galvanometer systems, each group of laser scanning galvanometer systems is composed of at least two laser scanning galvanometer systems, each group of laser scanning galvanometer systems corresponds to one independent scanning subarea, and laser beams of all the laser scanning galvanometer systems in each group of laser scanning galvanometer systems respectively carry out full-coverage scanning on the same independent scanning subarea.
3. The multi-partition redundancy scanning method of claim 2, wherein: the scannable range of the laser beam of each laser scanning galvanometer system is larger than the corresponding scanning subarea range, and the scanning areas of two adjacent groups of laser scanning galvanometer systems are crossed and overlapped at the boundary.
4. The multi-partition redundancy scanning method of claim 2, wherein: and all scanning subareas in the forming area of the forming chamber are arranged in an array state in a seamless connection mode.
5. The multi-partition redundancy scanning method of claim 2, wherein: each group of laser scanning galvanometer system consists of 2-3 laser scanning galvanometer systems.
6. The multi-partition redundancy scanning method of claim 1, wherein: and a forming opening is formed on the bottom surface of the lower end of the forming chamber, a forming cylinder is hermetically inserted in the forming opening, and a forming area is formed in the inner side area of a forming cavity of the forming cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110679895.6A CN113399824A (en) | 2021-06-18 | 2021-06-18 | Multi-partition redundancy scanning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110679895.6A CN113399824A (en) | 2021-06-18 | 2021-06-18 | Multi-partition redundancy scanning method |
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| Publication Number | Publication Date |
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| CN113399824A true CN113399824A (en) | 2021-09-17 |
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| CN202110679895.6A Pending CN113399824A (en) | 2021-06-18 | 2021-06-18 | Multi-partition redundancy scanning method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0436352A2 (en) * | 1989-12-29 | 1991-07-10 | E.I. Du Pont De Nemours And Company | Solid imaging method and apparatus |
| CN101125391A (en) * | 2007-09-01 | 2008-02-20 | 南昌大学 | Composite scanning filling method for quick forming machine |
| CN102962452A (en) * | 2012-12-14 | 2013-03-13 | 沈阳航空航天大学 | Metal laser deposition manufactured scan route planning method based on infrared temperature measurement images |
| CN104985181A (en) * | 2015-08-05 | 2015-10-21 | 湖南华曙高科技有限责任公司 | Laser scanning method for manufacturing three-dimensional object |
| CN109434107A (en) * | 2018-12-06 | 2019-03-08 | 华中科技大学 | A kind of multipotency beam high efficiency increasing material manufacturing method |
-
2021
- 2021-06-18 CN CN202110679895.6A patent/CN113399824A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0436352A2 (en) * | 1989-12-29 | 1991-07-10 | E.I. Du Pont De Nemours And Company | Solid imaging method and apparatus |
| CN101125391A (en) * | 2007-09-01 | 2008-02-20 | 南昌大学 | Composite scanning filling method for quick forming machine |
| CN102962452A (en) * | 2012-12-14 | 2013-03-13 | 沈阳航空航天大学 | Metal laser deposition manufactured scan route planning method based on infrared temperature measurement images |
| CN104985181A (en) * | 2015-08-05 | 2015-10-21 | 湖南华曙高科技有限责任公司 | Laser scanning method for manufacturing three-dimensional object |
| CN109434107A (en) * | 2018-12-06 | 2019-03-08 | 华中科技大学 | A kind of multipotency beam high efficiency increasing material manufacturing method |
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Application publication date: 20210917 |
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