CN114055773B - Detection method of photo-curing 3D printer - Google Patents

Detection method of photo-curing 3D printer Download PDF

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Publication number
CN114055773B
CN114055773B CN202111569592.5A CN202111569592A CN114055773B CN 114055773 B CN114055773 B CN 114055773B CN 202111569592 A CN202111569592 A CN 202111569592A CN 114055773 B CN114055773 B CN 114055773B
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China
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test
printer
pair
square
diagonal line
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CN202111569592.5A
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CN114055773A (en
Inventor
边晶
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Anhui Guangli Intelligent Technology Co ltd
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Anhui Guangli Intelligent Technology Co ltd
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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
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • 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
    • 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
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C2037/90—Measuring, controlling or regulating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The application discloses a detection method of a photocuring 3D printer, which comprises the steps of adopting a 3D printer to be detected to print a test model, then measuring a printed test piece, and judging the printer condition according to a measurement result; wherein the test pattern is a cubic structure formed by superposing the same test pattern along the printing stacking direction, the test pattern comprises a transverse straight bar, a longitudinal straight bar and nine square test squares, nine test squares are divided into three rows and three columns are distributed in a square grid plate at equal intervals; a pair of test squares positioned at two ends of one diagonal line of the square grid plate are respectively cut by two parallel lines parallel to the other diagonal line to form a pair of mutually parallel detection inclined planes, and the distances between the two pairs of detection inclined planes are equal. The light-emitting definition and the light-emitting uniformity of the 3D printer optical machine can be judged by measuring the sizes of all parts on the printing test piece.

Description

Detection method of photo-curing 3D printer
Technical Field
The application relates to the technical field of 3D printing, in particular to a method capable of rapidly checking the optical-mechanical projection performance of a 3D printer.
Background
The working principle of the photo-curing 3D printer is that the optical projection equipment is utilized to cure the polymer resin material layer by layer, and finally various 3D printing products with complex shapes are formed, so that the optical machine is an important component affecting the performance of the 3D printer. In the installation and debugging period of the existing 3D printer, the levelness, the light emitting uniformity and the like of the optical machine are required to be debugged, and along with the accumulation of working time, the optical machine has the defects of defocusing, uneven light emitting and the like, and a worker is required to detect multiple fixed points by using optical detection equipment, so that the detection result is accurate, but the detection efficiency is very low.
Disclosure of Invention
The purpose of the application is to provide a detection method of a photocuring 3D printer, which can conveniently detect whether defects such as defocusing, uneven light emission and the like exist in an optical machine.
In order to achieve the above purpose, the present application adopts the following technical scheme: a detection method of a photo-curing 3D printer comprises the following steps:
1) Establishing a test model;
2) Loading the test model by a 3D printer to be detected, and printing to obtain a printed test piece;
3) Measuring the printing test piece, and judging the printer condition according to the measurement result;
the test pattern comprises at least one transverse straight strip extending along the transverse equal width, at least one longitudinal straight strip extending along the longitudinal equal width and nine square test squares, wherein the nine test squares are divided into three rows and three columns and distributed in a square plate at equal intervals; a pair of test squares positioned at two ends of one diagonal line of the square plate are respectively cut by two parallel line parallel to the other diagonal line to form a pair of mutually parallel detection inclined planes, and the distance between the pair of the detection inclined planes positioned on one diagonal line is equal to the distance between the pair of the detection inclined planes positioned on the other diagonal line.
In one embodiment, the test pattern includes a pair of the lateral bars and a pair of the longitudinal bars, and the lateral bars are perpendicular to the longitudinal bars.
In one embodiment, a pair of the horizontal and vertical strips and a pair of the vertical strips are respectively distributed around the square plate, and the horizontal and vertical strips are respectively parallel to two sides of the test square, which are mutually perpendicular.
In one embodiment, in the step 3, the size of the printed test piece is measured.
In one embodiment, the dimensions include: the length and width of each transverse straight bar and each longitudinal straight bar, and the length of each side of each test square are respectively positioned at the distance between two pairs of detection inclined planes on two diagonal lines.
In one embodiment, the test square is annular, and the dimension includes a width of the test square around the annular shape.
The application is that the special test model is printed to the photocuring 3D printer that waits to detect, obtains to print the test piece to through measuring the size everywhere on this printing test piece, judge the light-emitting definition and the light-emitting homogeneity of 3D printer ray apparatus, can be very directly perceived and swift understanding the ray apparatus working condition of 3D printer.
Drawings
FIG. 1 is a schematic diagram of a photo-curing 3D printer;
fig. 2 is a 3D printed test pattern of the present application.
Detailed Description
In order to describe the technical content, constructional features, objects and effects of the invention in detail, the technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, the specific shapes, configurations, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.
The application relates to a detection method of a photo-curing 3D printer, which is used for rapidly detecting the optical machine condition of the 3D printer. Fig. 1 shows a bottom-illuminated photo-curing 3D printer, the photo-curing 3D printer comprises a machine table 1, a light machine 2 arranged below the machine table 1, a trough 3 with a light-transmitting window arranged at the bottom, and a printing platform 4 arranged above a linear screw module 6 in a lifting manner. The light machine 2 projects upwards, the photosensitive resin in the trough 3 is solidified, the lower surface of the printing platform 4 is solidified and molded, and the photosensitive resin is stacked layer by layer along with the rising of the printing platform 4, so that a 3D product to be printed is finally obtained.
Specifically, the detection method provided in this embodiment includes the following steps:
1) Establishing a three-dimensional test model, wherein the test model can be modeled by modeling software carried by a 3D printer, or can be established by an external computer system and then imported into the 3D printer;
2) Loading the test model by a 3D printer to be detected and printing to obtain a printed test piece;
3) And measuring the printing test piece, and judging the working condition of the printer according to the measurement result.
The measurement content may include flatness, straightness, roughness, precision, etc. for example, after the measurement of the size, the precision of the printed test piece is lower than the standard error, then the optical machine of the printer is known to need to be calibrated.
In this application, in order to simplify the measurement process, the test model is designed into a three-dimensional shape with a cubic structure, and the test patterns 5 are stacked along the print stacking direction, that is, the lengths and widths of the sections are consistent in terms of stacking of the printed test pieces.
The test pattern 5 according to the present invention is shown in fig. 2, and includes: the pair of transverse straight strips 51 extending along the transverse direction and the same width, the pair of longitudinal straight strips 52 extending along the longitudinal direction and the same width and nine square test squares 53, the transverse straight strips 51 are perpendicular to the longitudinal straight strips 52, the pair of transverse straight strips 51 and the pair of longitudinal straight strips 52 are respectively distributed around the square grid plate 53, two sides of the square grid plate 53 which are perpendicular to each other are respectively arranged along the transverse direction and the longitudinal direction, the width and the length dimensions of the pair of transverse straight strips are equal (the length is L2, the width is W1), and the width and the length of the pair of longitudinal straight strips are equal (the length is L3, and the width is W1). In other embodiments of the present application, the number and positions of the horizontal and vertical strips may be adjusted according to actual needs, and only the width and length dimensions of the horizontal and vertical strips may be detected by dimension measurement, so as to obtain whether the optical machine has the problems of deformation, defocus, uneven illumination, etc. in the horizontal and vertical projection, where the horizontal and vertical strips correspond to the X-axis precision of the optical machine, and the vertical strips correspond to the Y-axis precision of the optical machine. The length of the transverse straight strip can be set between 100 and 150mm, the length of the longitudinal straight strip can be set between 60 and 120mm, and the widths of the transverse straight strip and the longitudinal straight strip can be set between 2 and 8 mm.
The nine test squares 53 are evenly distributed in a square grid tray in a nine-grid pattern, each test square 53 corresponds to a projection area of the light engine, by detecting the size of each test square in the printed test piece, the problem of uneven light emission of the optical machine can be quickly known.
With continued reference to fig. 2, among the nine test squares, the test squares located at the four corners of the square tray are each cut by a corner cut by a plane parallel to the diagonal line, and as shown in the drawing, a pair of test squares located at both ends of one diagonal line are cut by two parallel lines parallel to the other diagonal line, forming a pair of detection inclined planes 531 parallel to each other. The shortest distance between the pair of detection slopes 531 located on one diagonal line is equal to the shortest distance L1 between the pair of detection slopes 531' located on the other diagonal line. When the test square is detected, the problems of deformation, defocusing, uneven light emission and the like of the projection of the printer optical machine can be known by measuring the shortest distance L1 between two pairs of detection inclined planes and the side length L4 of each test square 53.
In step 3 of the present embodiment, the size of the printed test piece is measured by a vernier caliper, or by a contour die or the like.
The dimensions to be measured include: the length and width of each horizontal straight bar and each vertical straight bar, and the side lengths of each test square are respectively positioned at the distance between two pairs of detection inclined planes on two diagonal lines. In this embodiment, the test square is in a ring shape with a square outline, and the dimension to be tested may also include the width of the test square around the ring shape.
Through the method, the sizes of all parts in the printed test piece are measured, and if the error of the actually measured size exceeds 0.03mm, the 3D printer can be judged to be unqualified in precision and needs to be calibrated. The method is simple, low in implementation cost and capable of rapidly acquiring the performance of the 3D printer.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, the scope of which is defined in the appended claims, specification and their equivalents.

Claims (4)

1. The detection method of the photo-curing 3D printer is characterized by comprising the following steps of:
1) Establishing a test model;
2) Loading the test model by a 3D printer to be detected, and printing to obtain a printed test piece;
3) Measuring the size of the printing test piece, judging the printer condition according to the measurement result, and if the actually measured size error exceeds a set value, judging that the 3D printer condition is unqualified and needing to be regulated;
the test pattern comprises at least one transverse straight strip extending along the transverse equal width, at least one longitudinal straight strip extending along the longitudinal equal width and nine square test squares, wherein the nine test squares are divided into three rows and three columns and distributed in a square plate at equal intervals; a pair of test squares positioned at two ends of one diagonal line of the square plate are respectively cut by two parallel line parallel to the other diagonal line to form a pair of mutually parallel detection inclined planes, and the distance between the pair of the detection inclined planes positioned on one diagonal line is equal to the distance between the pair of the detection inclined planes positioned on the other diagonal line;
the dimensions described in step 3 include: the length and width of each of the horizontal and vertical bars, the length of each of the sides of each of the test squares, and the distance between two pairs of the detection slopes respectively located on two diagonal lines.
2. The method for detecting a photo-curing 3D printer according to claim 1, wherein: the test pattern comprises a pair of transverse straight strips and a pair of longitudinal straight strips, and the transverse straight strips are perpendicular to the longitudinal straight strips.
3. The method for detecting a photo-curing 3D printer according to claim 2, wherein: the pair of transverse straight strips and the pair of longitudinal straight strips are respectively distributed around the square plate, and are respectively parallel to two sides of the test square, which are mutually perpendicular.
4. The method for detecting a photo-curing 3D printer according to claim 1, wherein: the test square is annular, and the dimension comprises the width of each annular part of the test square.
CN202111569592.5A 2021-12-21 2021-12-21 Detection method of photo-curing 3D printer Active CN114055773B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN114055773B true CN114055773B (en) 2023-07-18

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10052823B2 (en) * 2014-10-08 2018-08-21 Xerox Corporation System and method for test pattern formation during three-dimensional object printing
US10291816B2 (en) * 2015-01-23 2019-05-14 Xerox Corporation System and method for identification and control of z-axis printhead position in a three-dimensional object printer
WO2016173668A1 (en) * 2015-04-30 2016-11-03 Hewlett-Packard Development Company, L.P. Misalignment detection for a 3d printing device
CN108189388B (en) * 2017-11-24 2020-02-18 大族激光科技产业集团股份有限公司 Debugging model and calibration method for scaling ratio of X-Y molding surface of 3D printer
CN209492173U (en) * 2018-11-21 2019-10-15 厦门达天电子科技有限公司 A kind of test block of 3D printing photosensitive resin

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