CN107672180A - A kind of 3D printing accuracy checking method based on reverse Engineering Technology - Google Patents
A kind of 3D printing accuracy checking method based on reverse Engineering Technology Download PDFInfo
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- CN107672180A CN107672180A CN201710794471.8A CN201710794471A CN107672180A CN 107672180 A CN107672180 A CN 107672180A CN 201710794471 A CN201710794471 A CN 201710794471A CN 107672180 A CN107672180 A CN 107672180A
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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
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Abstract
The present invention relates to a kind of 3D printing accuracy checking method based on reverse Engineering Technology,The CAD model of part is established first with three-dimensional software,And it is converted into the STL formatted files that 3D printer can identify,Then the part printed is scanned using optical scanner,To obtain the cloud data of part,Finally cloud data is handled in reverse software,Error analysis is carried out to original CAD model of cloud data and part using reverse inspection software software,So as to measure the precision of 3D printing,It is a feature of the present invention that the measurement of printing precision is completed by reverse thought,It can be generalized in metallic print,Accuracy detection is carried out to the metal parts of printing,It is significant for the application of research metallic print industrially later,And for some industries higher to parts required precision,As Aero-Space are significant,There is good market application foreground in industrial circle.
Description
Technical field
The present invention relates to 3D printing precision field, and in particular to a kind of 3D printing accuracy detection based on reverse Engineering Technology
Method.
Background technology
3D printing technique is a kind of rapid shaping technique, and it refers under the control of the computer, according to the computer aided manufacturing of object
Help and design a model or the data such as computed tomography, accumulated by the accurate 3D of material, quickly manufacture arbitrarily complicated shape 3D
The novel digital forming technique of object, with the development of modern industry and the progress of society, market competition requires product development
Develop towards the direction of small lot, variation, personalization, and require product renewing faster, cost it is lower, thus rapid shaping technique
Fast development is got up, and at present, the industry such as modelling, vehicle manufacture, Aero-Space, biologic medical has begun to commonly used be somebody's turn to do
Technology, required precision of these fields to part is also higher, and particularly metallic print is fast-developing in recent years, it is desirable to 3D printing
The precision of the part gone out also more and more higher, therefore, improve 3D printing precision for research metallic print later industrially should
With significant, on the other hand, in order to preferably utilize the advanced systems such as rapid prototyping system, computer aided manufacture system
System is handled and managed to product, it is necessary to and the CAD 3D data of product, it will be transformed from product mock-up, in
It is reverse Engineering Technology fast development, different with common product Top-Down Design to be, reverse Engineering Technology is with existing
Product material object design the three-dimensional digital model of product, by this process it is possible to existing sample is analyzed and improves, to
There is the secondary improvement of design, its groundwork is by 3-D scanning and computer software, and the mock-up of product is changed into
Can secondary design again three-dimensional digital model, do so and both preferably used CAD/CAE/CAM technologies to carry out existing product
Design, the efficiency and quality of engineering design and Machining Analysis are improved again.
The content of the invention
Present invention aims at a kind of high-precision 3D printing part of acquisition is provided, beaten available for the metal industrially produced
The 3D printing accuracy checking method based on reverse Engineering Technology of part is printed, one kind provided by the invention is based on reverse Engineering Technology
3D printing accuracy checking method, the CAD model of part is established first with three-dimensional software, and be converted into 3D printer to know
Other STL formatted files, then the part printed is scanned using optical scanner, to obtain the point cloud number of part
According to finally being handled in reverse software cloud data, the original using reverse inspection software to cloud data and part
There is CAD model to carry out error analysis, so as to measure the precision of 3D printing, the method for measurement 3D printing precision provided by the invention is high
It is school, reliable, there is good market application foreground in industrial circle, especially in the field higher to parts required precision,
In order to realize the purpose of foregoing invention, the present invention is achieved using following technical scheme：
A kind of 3D printing accuracy checking method based on reverse Engineering Technology, it comprises the following steps：
A. the model of part is drawn using three-dimensional software, and is switched to STL forms；
B. the cavity temperature for adjusting 3D printer is 158 DEG C and nozzle temperature is 178 DEG C, is then introduced into above-mentioned STL formatted files,
Print parameters are set, and wherein extruded velocity and filling speed is default setting, and Contour filling width is 0.45mm, and offset is
0.25, Contour filling number is 4, and grid filling width is 0.45mm, and support angle is 15 °, and raster width 1mm, parameter is set
After the completion of fixed, start to print part；
C. optical scanner is adjusted, is thrown first to focal line, white figure is thrown and throws striped, striped is first switched to 25, with reference to rear
Whether the test strip in face scans obtained picture, suitable come fringe number selected by determining, if test strip effect is bad, then adjusts striped
Numerical value, camera calibration is then carried out, set calibration value as after 0-3, system can carry out automatic Calibration, when the left bat of calibrating block
When once right bat once returns to origin-location afterwards, a correct calibration result occurs in the upper right corner of software calibration interface,
Now represent to complete demarcation, after the completion of demarcation, part is placed on turntable and is scanned, to scan out the cloud data of part, root
Calculating scanning error according to scanning theory is；
D. the cloud data for scanning the part come is handled in reverse software, including deletes external acnode and miscellaneous point,
Noise reduction process and sampling processing, the cloud data handled well is packaged to enter the polygon stage, in the more of data
The side shape stage will be handled tri patch, and problematic tri patch is repaired including the use of grid doctor, deleted
Spike, remove feature and repair hole etc., finally obtain the model repaired, then the model repaired is subjected to curved surface weight
Structure, and the model reconstructed is switched into point cloud format, for use in the precision analysis of next step；
E. the cloud data directly obtained after the CAD model of part and scanning is imported and error point is carried out in reverse inspection software
Analysis, draws error；
F. the cloud data changed into after being reconstructed by the CAD model of part and in reverse software, which is imported in reverse inspection software, to be carried out
Error analysis, obtain data processing error；
G. the error for finally drawing 3D printing is。
Further, the 3D printer in the step (2) is FDM forming machines, 3D printing material PLA.Further,
3D scanners in the step (3) use 3D CaMega optical three-dimensional scanning systems.
Further, the surface reconstruction in the step (4) uses Nurse Surface Methods.
Further, the error analysis in the step (5) is 3D compares, 2D compares and border is compared.
Further, the error analysis in the step (6) is 3D compares, 2D compares and border is compared.
Compared with the prior art, the invention has the advantages that：
A. by the way that the precision of 3D printing model is measured and analyzed, the precision of a higher 3D printing part of acquisition is found out
Approach, for later 3D printing in terms of space flight, the industry such as vehicle production is all of great importance；
B. by carrying out detection comparison to the part printed and its CAD model, error is analyzed, for later further to printing
Error compensates and improved metallic print precision and lays the groundwork；
C. the present invention is convenient using equipment, simple to operate, can print mould of different shapes using 3D printer according to specific needs
Type；
D. cost of the present invention is cheap, and energy consumption is low, and print speed is fast, and printing effect is good, beneficial to research funding is saved, improves scientific research effect
Rate.
Brief description of the drawings
Fig. 1 is 3-D scanning procedure Procedure figure of the present invention；
Fig. 2 is reverse software workflow diagram；
Fig. 3 is reverse detection workflow diagram.
Embodiment
A kind of 3D printing accuracy checking method based on reverse Engineering Technology described in this example comprises the following steps：
A. the 3D models of rectangular-box are established by three-dimensional software, and are switched to the STL formatted files that 3D printer can identify；
B. the cavity temperature for regulating FDM type 3D printers is 158 DEG C and nozzle temperature is 178 DEG C, printed material PLA, will
The rectangular-box file of STL forms is imported in 3D printer, sets print parameters, and wherein extruded velocity and filling speed sets for acquiescence
Fixed, Contour filling width is 0.45mm, and offset 0.25, Contour filling number is 4, and grid filling width is 0.45mm, branch
Support angle degree is 15 °, raster width 1mm, after the completion of parameter setting, starts to print part, obtains the printer model of rectangular-box；
C. 3D CaMega optical three-dimensional scanning systems are adjusted, are thrown first to focal line, white figure is thrown and throws striped, first striped
25 are switched to, obtained picture is scanned with reference to test strip below, it is whether suitable come fringe number selected by determining, if test strip effect
It is bad, then striped numerical value is adjusted, then carries out camera calibration, sets calibration value as after 0-3, system can be marked automatically
It is fixed, until once right bat once returns to origin-location to the left bat of calibrating block afterwards, occur one in the upper right corner of software calibration interface
Individual correct calibration result, now represent to complete demarcation, after the completion of demarcation, rectangular-box is placed on turntable and is scanned, to sweep
Go out the cloud data of rectangular-box, calculating scanning error according to scanning theory is；
D. handled in reverse software scanning the cloud data of rectangular-box come, including delete external acnode and miscellaneous
Point, noise reduction process and sampling processing, the cloud data handled well is packaged to enter the polygon stage, in data
The polygon stage will be handled tri patch, and problematic tri patch is repaired including the use of grid doctor, deleted
Except spike, feature and reparation hole etc. are removed, finally obtains the model repaired, then the model repaired is carried out
Nurse surface reconstructions, and the rectangular BOX Model reconstructed is switched into point cloud format, for use in the precision analysis of next step；
E. the cloud data directly obtained after the CAD model of rectangular-box and scanning is imported and 3D ratios is carried out in reverse inspection software
Compared with, 2D compares and border is compared, draw error；
F. the cloud data changed into after being reconstructed by the CAD model of part and in reverse software, which is imported in reverse inspection software, to be carried out
3D compares, 2D compares and border is compared, and obtains data processing error；
G. the error for finally drawing 3D printing is。
Claims (6)
1. a kind of 3D printing accuracy checking method based on reverse Engineering Technology, it is characterised in that it comprises the following steps：
A. the model of part is drawn using three-dimensional software, and is switched to STL forms；
B. the cavity temperature for adjusting 3D printer is 158 DEG C and nozzle temperature is 178 DEG C, is then introduced into above-mentioned STL formatted files,
Print parameters are set, and wherein extruded velocity and filling speed is default setting, and Contour filling width is 0.45mm, and offset is
0.25, Contour filling number is 4, and grid filling width be 0.45 mm, and support angle is 15 °, and raster width is 1 mm, parameter
After the completion of setting, start to print part；
C. optical scanner is adjusted, is thrown first to focal line, white figure is thrown and throws striped, striped is first switched to 25, with reference to rear
Whether the test strip in face scans obtained picture, suitable come fringe number selected by determining, if test strip effect is bad, then adjusts striped
Numerical value, camera calibration is then carried out, set calibration value as after 0-3, system can carry out automatic Calibration, when the left bat of calibrating block
When once right bat once returns to origin-location afterwards, a correct calibration result occurs in the upper right corner of software calibration interface,
Now represent to complete demarcation, after the completion of demarcation, part is placed on turntable and is scanned, to scan out the cloud data of part, root
Calculating scanning error according to scanning theory is；
D. the cloud data for scanning the part come is handled in reverse software, including deletes external acnode and miscellaneous point,
Noise reduction process and sampling processing, the cloud data handled well is packaged to enter the polygon stage, in the more of data
The side shape stage will be handled tri patch, and problematic tri patch is repaired including the use of grid doctor, deleted
Spike, remove feature and repair hole etc., finally obtain the model repaired, then the model repaired is subjected to curved surface weight
Structure, and the model reconstructed is switched into point cloud format, for use in the precision analysis of next step；
E. the cloud data directly obtained after the CAD model of part and scanning is imported and error point is carried out in reverse inspection software
Analysis, draws error；
F. the cloud data changed into after being reconstructed by the CAD model of part and in reverse software, which is imported in reverse inspection software, to be carried out
Error analysis, obtain data processing error；
G. the error for finally drawing 3D printing is。
A kind of 2. 3D printing accuracy checking method based on reverse Engineering Technology according to claim 1, it is characterised in that
3D printer in the step (2) is FDM forming machines, 3D printing material PLA.
A kind of 3. 3D printing accuracy checking method based on reverse Engineering Technology according to claim 1, it is characterised in that
3D scanners in the step (3) use 3D CaMega optical three-dimensional scanning systems.
A kind of 4. 3D printing accuracy checking method based on reverse Engineering Technology according to claim 1, it is characterised in that
Surface reconstruction in the step (4) uses Nurse Surface Methods.
A kind of 5. 3D printing accuracy checking method based on reverse Engineering Technology according to claim 1, it is characterised in that
Error analysis in the step (5) is 3D compares, 2D compares and border is compared.
A kind of 6. 3D printing accuracy checking method based on reverse Engineering Technology according to claim 1, it is characterised in that
Error analysis in the step (6) is 3D compares, 2D compares and border is compared.
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Cited By (13)
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| CN109016488A (en) * | 2018-07-24 | 2018-12-18 | 王玉芹 | A kind of 3D printing method |
| CN109352989A (en) * | 2018-11-29 | 2019-02-19 | 哈尔滨工业大学 | A kind of method of 3D printing lightweight single pendulum |
| CN109579733A (en) * | 2018-11-30 | 2019-04-05 | 广东省新材料研究所 | A kind of laser 3D printing compact dimensions precision method for rapidly estimating |
| CN109730791A (en) * | 2018-12-24 | 2019-05-10 | 东莞市爱嘉义齿有限公司 | The digitlization integral formation method of artificial tooth attachment |
| CN109816633A (en) * | 2018-12-27 | 2019-05-28 | 大族激光科技产业集团股份有限公司 | A kind of defect monitoring method based on 3D printing system, device and terminal device |
| CN110115652A (en) * | 2019-06-24 | 2019-08-13 | 西安增材制造国家研究院有限公司 | A kind of 3 D-printing protector and its Method of printing |
| CN110169832A (en) * | 2019-06-21 | 2019-08-27 | 深圳市康泰健牙科器材有限公司 | A kind of 3D printer dental prosthetic model printing precision method of inspection |
| CN110279489A (en) * | 2019-08-07 | 2019-09-27 | 云智愈(南京)医疗科技有限公司 | Whole blood endoluminal stent windowing method based on 3D printing technique |
| CN110470213A (en) * | 2018-12-19 | 2019-11-19 | 中联认证中心(北京)有限公司 | A kind of online assessment device of 3D printing drip molding precision |
| CN112067329A (en) * | 2020-08-25 | 2020-12-11 | 共享智能铸造产业创新中心有限公司 | 3D printer delivery detection system, printer, detection method and storage medium |
| CN112304216A (en) * | 2020-09-30 | 2021-02-02 | 中电建冀交高速公路投资发展有限公司 | Rock mass information acquisition test system based on 3D printing model and verification method thereof |
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| CN115139535A (en) * | 2022-07-11 | 2022-10-04 | 河北工业大学 | 3D printer inverse feedback detection method and system based on three-dimensional reconstruction technology |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109016488A (en) * | 2018-07-24 | 2018-12-18 | 王玉芹 | A kind of 3D printing method |
| CN109016488B (en) * | 2018-07-24 | 2020-08-11 | 江西金石三维智能制造科技有限公司 | 3D printing method |
| CN109352989A (en) * | 2018-11-29 | 2019-02-19 | 哈尔滨工业大学 | A kind of method of 3D printing lightweight single pendulum |
| CN109579733A (en) * | 2018-11-30 | 2019-04-05 | 广东省新材料研究所 | A kind of laser 3D printing compact dimensions precision method for rapidly estimating |
| CN110470213A (en) * | 2018-12-19 | 2019-11-19 | 中联认证中心(北京)有限公司 | A kind of online assessment device of 3D printing drip molding precision |
| CN109730791A (en) * | 2018-12-24 | 2019-05-10 | 东莞市爱嘉义齿有限公司 | The digitlization integral formation method of artificial tooth attachment |
| CN109816633A (en) * | 2018-12-27 | 2019-05-28 | 大族激光科技产业集团股份有限公司 | A kind of defect monitoring method based on 3D printing system, device and terminal device |
| CN110169832A (en) * | 2019-06-21 | 2019-08-27 | 深圳市康泰健牙科器材有限公司 | A kind of 3D printer dental prosthetic model printing precision method of inspection |
| CN110169832B (en) * | 2019-06-21 | 2021-06-08 | 深圳市康泰健牙科器材有限公司 | 3D printer dental restoration model printing precision inspection method |
| CN110115652A (en) * | 2019-06-24 | 2019-08-13 | 西安增材制造国家研究院有限公司 | A kind of 3 D-printing protector and its Method of printing |
| CN110279489A (en) * | 2019-08-07 | 2019-09-27 | 云智愈(南京)医疗科技有限公司 | Whole blood endoluminal stent windowing method based on 3D printing technique |
| CN112067329A (en) * | 2020-08-25 | 2020-12-11 | 共享智能铸造产业创新中心有限公司 | 3D printer delivery detection system, printer, detection method and storage medium |
| CN112304216A (en) * | 2020-09-30 | 2021-02-02 | 中电建冀交高速公路投资发展有限公司 | Rock mass information acquisition test system based on 3D printing model and verification method thereof |
| CN112304216B (en) * | 2020-09-30 | 2022-04-08 | 中电建冀交高速公路投资发展有限公司 | Rock mass information acquisition test system based on 3D printing model and verification method thereof |
| CN112677487A (en) * | 2020-12-30 | 2021-04-20 | 上海联泰科技股份有限公司 | Control method and control system for 3D printing and 3D printing equipment |
| CN115139535A (en) * | 2022-07-11 | 2022-10-04 | 河北工业大学 | 3D printer inverse feedback detection method and system based on three-dimensional reconstruction technology |
| CN115139535B (en) * | 2022-07-11 | 2023-05-26 | 河北工业大学 | Three-dimensional reconstruction technology-based 3D printer inverse feedback detection method and system |
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