CN111645321A - Leveling system and method of light curing equipment - Google Patents
Leveling system and method of light curing equipment Download PDFInfo
- Publication number
- CN111645321A CN111645321A CN201910159806.8A CN201910159806A CN111645321A CN 111645321 A CN111645321 A CN 111645321A CN 201910159806 A CN201910159806 A CN 201910159806A CN 111645321 A CN111645321 A CN 111645321A
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- scraper
- leveling system
- frame
- distance measuring
- light curing
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000000016 photochemical curing Methods 0.000 claims abstract description 17
- 238000001723 curing Methods 0.000 claims abstract description 16
- 230000001360 synchronised effect Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 6
- 238000012937 correction Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/245—Platforms or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for 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
Abstract
The invention discloses a leveling system and a method of light curing equipment, wherein the system comprises: a scraper that moves in a horizontal direction; a range finder mounted on the scraper; the distance measuring instrument measures the distance between the distance measuring instrument and the liquid plane and takes the liquid plane as a reference plane; the scraper is arranged on the forming platform, and the frame is provided with a plurality of controllable supporting components which are respectively positioned at different positions to support the frame. The method is simple to operate, accurate to control, shortens the operation time, effectively realizes the leveling of the photocuring molding equipment, and improves the dimensional accuracy and the surface quality of the molding model.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a leveling system and method of photocuring equipment.
Background
The 3D printing technology is also called additive manufacturing, and is a new manufacturing technology for forming a material layer by using a heating or photocuring method based on a three-dimensional digital model. The photocuring forming process is the most mature and widely applied 3D printing technology at present, liquid photosensitive resin is used as a raw material and is solidified and formed through an external light source, in the forming process, after one layer of resin is cured, a lifting workbench bearing a workpiece descends by one layer of thickness, a scraper scrapes the liquid level of the resin with high viscosity, and then the next layer of resin is scanned and cured.
In the initial stage of 3D printing, i.e. in the process of processing the first molding surface, the accuracy of parallelism and distance of the surface of the work platform relative thereto is one of the key factors that affect the success rate of the three-dimensional printing task, and therefore the problem of mutual leveling and matching of the level of the entire machine, the raw material liquid, the molding platform, the liquid level scraper, and the liquid level distance measurement needs to be solved before photocuring molding. At present, no leveling structure and control method of the photocuring equipment are available, which are simple to operate, high in efficiency and capable of realizing high-precision leveling.
Disclosure of Invention
The invention aims to provide a leveling system and a leveling method of photocuring equipment, which are simple to operate and high in efficiency and can realize high-precision leveling, and the leveling matching problem of leveling of the whole machine, raw material liquid, a forming platform, a liquid level scraper and liquid level distance measurement is solved.
To solve the above problems, an aspect of the present invention provides a leveling system for a light curing apparatus, the system including: a scraper that moves in a horizontal direction; a range finder mounted on the scraper; the distance measuring instrument measures the distance between the distance measuring instrument and the liquid plane and takes the liquid plane as a reference plane; the scraper is arranged on the forming platform, and the frame is provided with a plurality of controllable supporting components which are respectively positioned at different positions to support the frame.
Preferably, the scraper mainly comprises a scraper body, a scraper fixing component, a scraper adjusting component and an adjusting screw, wherein the scraper body is connected with the scraper fixing component through the scraper adjusting component, and the upper surface of the scraper fixing component is parallel to the horizontal plane of the cutting edge of the scraper body through the adjustment of the scraper adjusting component.
Preferably, a guide rail is arranged on the forming platform, and the scraper moves along the guide rail in the horizontal direction through a scraper moving device.
Preferably, the scraper moving device comprises a stepping motor, a synchronous belt and a guide rail, wherein the stepping motor is connected with the synchronous belt, and the synchronous belt drives the scraper to move along the guide rail.
Preferably, the scraper moving device comprises a servo motor, a guide rail and a lead screw, wherein the servo motor drives the scraper to move along the guide rail through the lead screw.
Preferably, the number of the distance measuring instruments is at least two.
Preferably, the liquid level is the liquid upper surface of the material contained in a trough located within the frame.
Preferably, the upper surface and the lower surface of the frame are both N-sided polygons, N is greater than or equal to 3, and the lower part of each corner of the lower surface of the frame is supported by one controllable support component.
Preferably, the upper surface and the lower surface of the frame are both N-sided polygons, N is greater than or equal to 3, the lower part of each corner of the lower surface of the frame is supported by one supporting component, one of the supporting components is supported by a fixed component, and the rest N-1 supporting components are supported by controllable supporting components.
Preferably, the controllable supporting component is a pneumatic device, a hydraulic device or an electric device, and after the height of the controllable supporting component is adjusted, the height of the controllable supporting component is locked in an electric control, numerical control or mechanical control mode.
According to another aspect of the present invention, there is provided a leveling method using the leveling system of the light curing apparatus of the first aspect, the method comprising the steps of:
a. adjusting screws of the scrapers to enable the upper surfaces of the scraper fixing parts to be parallel to the horizontal plane of the cutting edges of the scraper body;
b. mounting distance measuring instruments on the scraper, measuring absolute heights of at least two distance measuring instruments from the scraper to the horizontal plane of the cutting edge of the scraper body, calculating relative height differences of the distance measuring instruments, and inputting the relative height differences into a printing controller for correction;
c. starting the distance measuring instruments, and measuring the distances from at least two distance measuring instruments to the liquid plane;
d. starting a scraper moving device, moving a scraper and measuring the distances from at least two distance meters to the liquid plane;
e. calculating height compensation data through an algorithm according to at least four data of the distance liquid level measured by the distance measuring instrument;
f. controlling the lifting height of the controllable supporting component according to the height compensation data, and locking;
g. repeating steps c to f until the level of the light curing device meets the required standard.
Compared with the prior art, the invention has the beneficial effects that: the method has the advantages that the distance meter is arranged on the scraper, and the photocuring molding equipment is leveled by taking the liquid plane of the raw material as a reference, so that the method is simple to operate, accurate in control, short in operation time and capable of effectively achieving leveling of the photocuring molding equipment, and accordingly the size precision and the surface quality of a molding model are improved.
Drawings
FIG. 1 is a schematic structural view of a leveling system of a light curing apparatus of the present invention;
FIG. 2 is a schematic view of the construction of the doctor blade of the present invention;
FIG. 3 is a schematic structural view of the controllable support assembly of the present invention.
Reference numerals:
1. a scraper; 101. a scraper fixing component; 102. a blade adjusting member; 103. a scraper body; 104. adjusting screws; 2. a range finder; 3. a liquid level; 4. a trough; 5. a frame; 501. an upper frame body; 502. a column; 503. a bottom surface; 6. a stepping motor; 7. a synchronous belt; 8. a guide rail; 9. a forming platform; 10. fixing the support component; 11. a controllable support assembly; 111. a motor; 112. an elevator; 113. a lifting shaft; 114. a foot seat.
Detailed Description
The above features and advantages of the present invention, and those that characterize it, will be apparent from the following more particular description of the invention, taken in conjunction with the accompanying drawings, in which like reference characters refer to the same parts throughout the different views.
As shown in fig. 1, an embodiment of the present invention provides a leveling system of a light curing apparatus, the leveling system including: the scraper 1, the scraper 1 moves in the horizontal direction; the distance measuring instrument 2 is arranged on the scraper 1; the liquid level 3, the distance measuring instrument 2 measures the distance between the liquid level 3 and the liquid level 3, and the liquid level 3 is used as a reference surface; frame 5, the top of frame 5 is forming platform 9, and scraper 1 installs on forming platform 9, and frame 5 bottom is installed and is located the controllable supporting component 11 of a plurality of different positions respectively and come supporting frame 5.
Fig. 2 shows a schematic structural diagram of the scraper 1, and the scraper 1 mainly includes a scraper fixing member 101, a scraper adjusting member 102, a scraper body 103, and an adjusting screw 104. The blade body 103 is connected to the blade fixing member 101 through the blade adjusting member 102. The upper surface of the blade fixing member 101 is provided with an adjustment screw 104, and the blade adjustment member 102 is adjusted by the adjustment screw 104 so that the upper surface (surface a in fig. 2) of the blade fixing member 101 is parallel to the blade edge horizontal surface (surface B in fig. 2) of the blade body 103.
As shown in fig. 1, two guide rails 8 are disposed on the forming platform 9 of the frame 5, and the two guide rails 8 are located on the same horizontal plane and are parallel to each other. The scraper 1 moves in the horizontal direction through the scraper moving device, and the scraper moving device is connected with the printing controller to realize the control of the scraper 1. The scraper moving device comprises a stepping motor 6, a synchronous belt 7 and a guide rail 8, wherein the stepping motor 6 is connected with the synchronous belt 7, and the synchronous belt 7 drives the scraper 1 to move along the guide rail 8. The parallelism of the doctor blade 1 and the forming table 9 is ensured by the assembly.
It should be noted that the scraper moving device for implementing the technical solution of the present invention is not limited to the structure of the scraper moving device, the structure of the scraper moving device is only an optimal implementation manner, and any component capable of implementing controllable movement of the scraper may also be used as the scraper moving device of the present invention, for example, the scraper moving device may also mainly comprise a servo motor, a guide rail, and a lead screw, and the servo motor drives the scraper 1 to move along the guide rail 8 through the lead screw.
The distance meter 2 is used to measure the distance from the distance measuring opening of the distance meter 2 to the liquid level 3. The distance meters 2 are at least two, if the distance meters 2 are two, they are distributed at both ends of the blade 1 near the guide rail 8, and if the number of the distance meters 2 is more than two, the distance meters 2 are uniformly distributed on the blade 1, and the purpose is to make the measured data representative. The distance measuring instrument 2 is connected with the printing controller to realize the control and feedback of the liquid level distance measurement. The installation heights of two or more distance meters 2 on the scraper 1 are not required to be consistent, the influence of the distance meters 2 can be eliminated by correcting errors of the distance meters 2, the distance meters 2 are more conveniently installed on the premise of not influencing the measurement precision of the distance meters 2, a part needing to be leveled is reduced, and the leveling step is simplified.
The liquid plane 3 is the liquid upper surface of the raw materials held in the trough 4, the raw materials are photosensitive resin for photocuring molding, and the trough 4 is positioned in the frame 5.
The frame 5 is mainly composed of an upper frame 501, a vertical column 502, a bottom surface 503, a forming platform 9 and a supporting component. The upper frame 501 and the bottom surface 503 are connected by the upright 502, and the forming platform 9 is mounted on the upper surface of the upper frame 501, and is integrally mounted with the upper frame 501 and ensures flatness with high machining precision. The upper surface of the upper frame 501 may also be used as a molding platform for simplicity.
Both the upper frame 501 and the bottom surface 503 of the frame 5 are N-sided, and N is 3 or more. Each corner of the bottom surface of the frame 5 is supported below by one controllable support member 11, and each controllable support member 11 is connected to the print controller. To simplify the structure and reduce the number of adjustment steps, one of the controllable support members 11 may be changed to a fixed support member 10.
As shown in fig. 1, in the present embodiment, the upper frame body 501 and the bottom surface 503 of the frame 5 are both quadrilateral, and the lower parts of the four corners of the bottom surface 503 of the frame 5 are respectively supported by three controllable support assemblies 11 and one fixed support assembly 10, and each controllable support assembly 11 is respectively connected with the printing controller. The structure of the controllable support assembly 11 is shown in fig. 3, and the controllable support assembly 11 includes a motor 111, a lifter 112, a lifting shaft 113, and a foot 114. The motor 111 is connected to the lifter 112, the lifter 112 is connected to the lifting shaft 113, and the lifting shaft 113 is connected to the foot 114, so that the motor 111 drives the lifter 112 to move the lifting shaft 113 up and down when the height is adjusted.
It should be noted that the supporting component 11 for implementing the technical solution of the present invention is not limited to the structure of the controllable supporting component, the structure of the controllable supporting component 11 is only an optimal implementation manner, and any component that can implement height adjustment and can lock the height after the height adjustment can also be used as the controllable supporting component of the present invention, the controllable supporting component 11 can be a pneumatic device, a hydraulic device or an electric device, and after the height adjustment of the controllable supporting component 11, the height is locked by an electric control, numerical control or mechanical control manner.
The forming platform 9 and the frame 5 are integrally installed and processed with high precision to ensure the flatness, so that after the forming platform 9 and the liquid plane 3 are leveled, the whole frame 5 and the liquid plane 3 can be leveled, and the leveling of the whole photo-curing equipment can be realized only by adjusting the level of the forming platform 9 and the liquid plane 3.
According to another aspect of the present invention, there is provided a leveling method using a leveling system of a photo-curing device, the method comprising the steps of:
a. adjusting screws of the scrapers to enable the upper surface of the scraper fixing part 101 to be parallel to the horizontal plane of the blade of the scraper body 103;
b. installing distance measuring instruments 2 on a scraper 1, taking down the scraper 1 provided with the distance measuring instruments 2, measuring the absolute height from at least two distance measuring instruments 2 to the horizontal plane of the cutting edge of a scraper body 103 on a platform, calculating the relative height difference of each distance measuring instrument 2, and inputting the relative height difference into a printing controller for correction;
c. starting the distance measuring instruments 2, and measuring the distances from at least two distance measuring instruments 2 to the liquid plane 3;
d, starting the scraper moving device, moving the scraper 1, and measuring the distance from at least two distance meters 2 to the liquid plane 3;
e. calculating height compensation data through an algorithm according to at least four data of the distance liquid level 3 measured by the distance measuring instrument 2;
f. controlling the lifting height of the controllable supporting component 10 according to the height compensation data, and locking;
g. repeating steps c to f until the level of the light curing device meets the required standard.
Through the technical scheme of the invention, the following technical effects can be obtained: according to the invention, the distance meter is arranged on the scraper, the photocuring molding equipment is leveled by taking the liquid plane of the raw material as a reference surface, the leveling problem of liquid level distance measurement is reduced by using the error compensation method of the distance meter, the leveling steps are reduced, and the operation time is shortened. The method is simple to operate and accurate to control, effectively realizes leveling of the photocuring molding equipment, and improves the dimensional accuracy and the surface quality of the molding model. According to the invention, the problems of mutual leveling and matching of the leveling of the whole machine, raw material liquid, a forming platform, a liquid level scraper and liquid level distance measurement before photocuring forming can be realized only by simply fine-adjusting the scraper and leveling the whole frame.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.
Claims (11)
1. A leveling system for a light curing apparatus, the system comprising:
a scraper that moves in a horizontal direction;
a range finder mounted on the scraper;
the distance measuring instrument measures the distance between the distance measuring instrument and the liquid plane and takes the liquid plane as a reference plane;
the scraper is arranged on the forming platform, and the frame is provided with a plurality of controllable supporting components which are respectively positioned at different positions to support the frame.
2. The leveling system of the photo-curing device according to claim 1, wherein the scraper is mainly composed of a scraper body, a scraper fixing member, a scraper adjusting member and an adjusting screw, the scraper body is connected to the scraper fixing member through the scraper adjusting member, and the upper surface of the scraper fixing member is made parallel to the horizontal plane of the blade of the scraper body by adjusting the scraper adjusting member.
3. The leveling system of a light curing apparatus according to claim 1, wherein a guide rail is provided on the forming platform, and the scraper is moved along the guide rail in a horizontal direction by a scraper moving device.
4. The leveling system of the photo-curing device as claimed in claim 3, wherein the scraper moving device comprises a stepping motor, a synchronous belt and a guide rail, the stepping motor is connected to the synchronous belt, and the synchronous belt drives the scraper to move along the guide rail.
5. The leveling system of the light curing device as claimed in claim 3, wherein the scraper moving device comprises a servo motor, a guide rail, and a lead screw, and the servo motor drives the scraper to move along the guide rail through the lead screw.
6. The leveling system of a light curing device of claim 1, wherein the range finder is at least two.
7. The leveling system of a light curing apparatus as described in claim 1, wherein said liquid level is a liquid top surface of a feedstock contained within a trough located within said frame.
8. The leveling system of claim 1, wherein the upper and lower surfaces of the frame are each N-sided, N being 3 or greater, and wherein each corner of the lower surface of the frame is supported below by a controllable support assembly.
9. The leveling system of claim 1, wherein the upper and lower surfaces of the frame are each N-sided polygons, N is 3 or more, and each corner of the lower surface of the frame is supported by a support assembly, one of the support assemblies being a fixed assembly and the remaining N-1 being a controllable support assembly.
10. The leveling system of the light curing device as claimed in claim 8 or 9, wherein the controllable supporting component is a pneumatic device, a hydraulic device or an electric device, and after the height of the controllable supporting component is adjusted, the height of the controllable supporting component is locked by an electric control, numerical control or mechanical control mode.
11. A method for leveling with a leveling system of a light curing apparatus according to any one of claims 1 to 10, characterized in that the method comprises the steps of:
a. adjusting screws of the scrapers to enable the upper surfaces of the scraper fixing parts to be parallel to the horizontal plane of the cutting edges of the scraper body;
b. mounting distance measuring instruments on the scraper, measuring absolute heights of at least two distance measuring instruments from the scraper to the horizontal plane of the cutting edge of the scraper body, calculating relative height differences of the distance measuring instruments, and inputting the relative height differences into a printing controller for correction;
c. starting the distance measuring instruments, and measuring the distances from at least two distance measuring instruments to the liquid plane;
d. starting a scraper moving device, moving a scraper and measuring the distances from at least two distance meters to the liquid plane;
e. calculating height compensation data through an algorithm according to at least four data of the distance liquid level measured by the distance measuring instrument;
f. controlling the lifting height of the controllable supporting component according to the height compensation data, and locking;
g. repeating steps c to f until the level of the light curing device meets the required standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910159806.8A CN111645321A (en) | 2019-03-04 | 2019-03-04 | Leveling system and method of light curing equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910159806.8A CN111645321A (en) | 2019-03-04 | 2019-03-04 | Leveling system and method of light curing equipment |
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| CN111645321A true CN111645321A (en) | 2020-09-11 |
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| CN201910159806.8A Pending CN111645321A (en) | 2019-03-04 | 2019-03-04 | Leveling system and method of light curing equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112356440A (en) * | 2021-01-14 | 2021-02-12 | 山东南道北数字科技有限公司 | Photocuring 3D printer levelling mechanism |
| CN112846237A (en) * | 2020-12-04 | 2021-05-28 | 北京星航机电装备有限公司 | 3D printing equipment leveling system and automatic leveling method thereof |
| CN113092239A (en) * | 2021-04-12 | 2021-07-09 | 合肥工业大学 | Hopkinson pressure bar device capable of being quickly and accurately adjusted and aligned |
| CN114228140A (en) * | 2021-11-19 | 2022-03-25 | 湖南华曙高科技股份有限公司 | Scraper detection method, three-dimensional object manufacturing equipment and powder spreading device thereof |
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