CN109910299B - Powder spreading state detection method and device of 3D printer - Google Patents
Powder spreading state detection method and device of 3D printer Download PDFInfo
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- CN109910299B CN109910299B CN201711326332.9A CN201711326332A CN109910299B CN 109910299 B CN109910299 B CN 109910299B CN 201711326332 A CN201711326332 A CN 201711326332A CN 109910299 B CN109910299 B CN 109910299B
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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
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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
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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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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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 invention provides a powder spreading state detection method and device of a 3D printer, wherein the method comprises the following steps: measuring a powder spreading state of a current printing layer through a light curtain, wherein the light curtain is parallel to a printing plane of the 3D printer; judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality. The invention realizes monitoring of the printing state of each layer of powder of the 3D printer, timely discovers and processes the printing layer with abnormal powder spreading and ensures the quality of the printed product.
Description
Technical Field
The invention relates to the technical field of 3D printers, in particular to a powder laying state detection method and device of a 3D printer.
Background
The 3D printing technology (3D printing), which is one of the rapid prototyping technologies, is a technology for constructing an object by stacking and accumulating layer by layer using a bondable material such as powdered metal or plastic based on a digital model file.
In the aspect of powder laying, the existing 3D printing technology mainly ensures the uniformity of powder laying through the motion precision of a lifting mechanism and the machining precision of a strickling mechanism. The mode has high requirements on the motion control of the lifting mechanism and the machining precision of the strickling mechanism.
However, the problem of uneven powder spreading in the 3D printing process cannot be completely avoided by improving the lifting mechanism and the strickling mechanism. When the condition of uneven powder spreading occurs, if the condition cannot be corrected in time, the quality of a printed product can be seriously influenced.
Disclosure of Invention
The invention provides a powder spreading state detection method and device of a 3D printer, which are used for monitoring the printing state of each layer of powder of the 3D printer, timely finding and processing a printing layer with abnormal powder spreading and ensuring the quality of a printed product.
In a first aspect, the present invention provides a powder spreading state detection method for a 3D printer, including:
measuring a powder spreading state of a current printing layer through a light curtain, wherein the light curtain is parallel to a printing plane of the 3D printer;
judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality.
Optionally, the measuring the powder spreading state of the current printing layer by the light curtain includes:
controlling the light curtain to move downwards from the height position of the adjacent last printing layer until the light curtain is received at the light curtain receiving end;
and recording the moving distance of the light curtain, and analyzing the light curtain received by the light curtain receiving end.
Optionally, the determining whether the current printing layer is normal according to the powder spreading state of the current printing layer includes:
when the moving distance of the light curtain is equal to a preset threshold value and the light curtain received by the light curtain receiving end is complete, determining that the current printing layer is normal;
and when the moving distance of the light curtain is not equal to a preset threshold value or the light curtain received by the light curtain receiving end is incomplete, determining that the current printing layer is abnormal.
Optionally, the correspondingly adjusting the current printing layer according to the type of the anomaly includes:
when the moving distance of the light curtain is greater than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a first difference value between the moving distance of the light curtain and the preset threshold value, and removing a layer of powder with the thickness equal to the first difference value from the current printing layer;
when the moving distance of the light curtain is smaller than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a second difference value between the preset threshold value and the moving distance of the light curtain, and adding a layer of powder with the thickness equal to the second difference value on the current printing layer;
when the light curtain received by the light curtain receiving end is incomplete, removing the powder printed on the current printing layer; and reprint the current layer according to the preset powder laying thickness.
In a second aspect, the present invention provides a powder spreading state detection apparatus for a 3D printer, including:
the laser thickness gauge is used for measuring the powder spreading state of the current printing layer through a light curtain, wherein the light curtain is parallel to the printing plane of the 3D printer;
the processor is used for judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality.
Optionally, the laser thickness gauge is specifically configured to:
controlling the light curtain to move downwards from the height position of the adjacent last printing layer until the light curtain is received at the light curtain receiving end;
and recording the moving distance of the light curtain, and analyzing the light curtain received by the light curtain receiving end.
Optionally, the laser thickness gauge includes: the system comprises a laser transmitter, a laser sensor and a light curtain analyzer;
the laser emitter is positioned on one side of a printing plane of the 3D printer and used for emitting a light curtain; the height of the light curtain emitted by the laser emitter is adjustable, or the height of the laser emitter is adjustable;
the laser sensor is positioned on the other side of the printing plane of the 3D printer and used for receiving the light curtain emitted by the laser emitter and sending the received light curtain to the processor;
and the light curtain analyzer is used for recording the moving distance of the light curtain and analyzing the light curtain received by the laser sensor so as to obtain the powder spreading state of the current printing layer.
Optionally, the processor is specifically configured to:
when the moving distance of the light curtain is equal to a preset threshold value and the light curtain received by the light curtain receiving end is complete, determining that the current printing layer is normal;
and when the moving distance of the light curtain is not equal to a preset threshold value or the light curtain received by the light curtain receiving end is incomplete, determining that the current printing layer is abnormal.
Optionally, the method further comprises:
the powder spreading assembly is used for carrying out powder feeding, powder spreading and scraping operations or powder shoveling operations according to the control signal sent by the processor;
the lifting assembly is used for controlling the height of the powder spreading assembly and/or the printing assembly according to a control signal sent by the processor;
the printer control main board is used for generating a corresponding printing starting signal or a printing suspending signal according to the control signal sent by the processor and sending the printing starting signal or the printing suspending signal to the printing component;
the printing component is used for executing printing operation according to a printing starting signal sent by the printer control main board; or pausing the current printing operation according to a pause printing signal sent by the printer control main board.
Optionally, the processor is specifically configured to:
when the moving distance of the light curtain is greater than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a first difference value between the moving distance of the light curtain and the preset threshold value, and shoveling a layer of powder with the thickness equal to the first difference value on the current printing layer through a powder paving assembly;
when the moving distance of the light curtain is smaller than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a second difference value between the preset threshold value and the moving distance of the light curtain, and adding a layer of powder with the thickness equal to the second difference value on the current printing layer through a powder laying assembly;
when the light curtain received by the light curtain receiving end is incomplete, the powder printed on the current printing layer is removed through the powder spreading assembly; and reprint the current layer according to the preset powder laying thickness.
The powder spreading state detection method and device of the 3D printer provided by the invention have the advantages that the powder spreading state of the current printing layer is measured through the light curtain, and whether the current printing layer is normal or not is judged according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality. Thereby realized monitoring the printing state of every layer of powder of 3D printer, in time discover and handle the printing layer of spreading the powder anomaly, guaranteed to print the quality of product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view of a 3D printer provided by the present invention;
fig. 2 is a flowchart of a powder spreading state detection method of a 3D printer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a powder spreading state detection device of a 3D printer according to a first embodiment of the present invention;
fig. 4 is a top view of a powder spreading state detection device of a 3D printer according to a first embodiment of the present invention;
in the figure:
1-a powder laying component;
2-a lifting assembly;
3-a printing assembly;
4-powder box;
5, printing a control mainboard;
6-programmable logic controller PLC;
7-RS485 bus;
8-a servo motor;
9-a laser sensor;
10-a light curtain;
11-laser emitter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In the following, some terms in the present application are explained to facilitate understanding by those skilled in the art:
1) the 3D printing technology (3D printing), which is one of the rapid prototyping technologies, is a technology for constructing an object by stacking and accumulating layers by layers (i.e., "build-up modeling method") using an adhesive material such as powdered metal or plastic based on a digital model file.
2) Programmable Logic Controllers (PLC) employ a type of Programmable memory for storing programs therein, executing user-oriented instructions such as Logic operations, sequence control, timing, counting, and arithmetic operations, and controlling various types of machinery or manufacturing processes via digital or analog input/output.
3) RS485 communication interface, which is used for data communication by adopting differential signal negative logic, wherein
+2V to +6V represent "0", and-6V to-2V represent "1". The RS485 has two-wire system and four-wire system, the four-wire system is full-duplex communication mode, and the two-wire system is half-duplex communication mode.
The powder spreading state detection method of the 3D printer can be applied to the existing 3D printer adopting powder printing. Fig. 1 is a top view of a 3D printer provided in the present invention, as shown in fig. 1, including: the powder spreading assembly 1, the lifting assembly 2, the printing assembly 3 and the powder box 4; the lifting component 2 controls the height of the powder box 4, when the lifting component reaches a preset height, the powder spreading component 1 spreads the powder in the powder box 4 on the current layer of the workpiece, and finally the printing component 3 finishes the printing of the current layer. The 3D printer in fig. 1 mainly ensures the uniformity of powder laying by the movement precision of the lifting mechanism (lifting component 2) and the machining precision of the strickling mechanism. The mode has high requirements on the motion control of the lifting mechanism and the machining precision of the strickling mechanism. However, through the improvement of the lifting mechanism and the strickling mechanism, the problem of uneven powder laying in the 3D printing process cannot be avoided. When the condition of uneven powder spreading occurs, if the condition cannot be corrected in time, the quality of a printed product can be seriously influenced.
The invention provides a powder spreading state detection method of a 3D printer, and aims to solve the technical problems in the prior art.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 2 is a flowchart of a powder spreading state detection method of a 3D printer according to an embodiment of the present invention, and as shown in fig. 2, the method in this embodiment may include:
and S101, measuring the powder spreading state of the current printing layer through a light curtain.
In this embodiment, the light curtain with the printing plane of 3D printer is parallel, scans current printing layer through the light curtain, obtains the shop's powder state of current printing layer.
Alternatively, the light curtain can be controlled to move downwards from the height position of the adjacent last printing layer until the light curtain is received at the light curtain receiving end; and recording the moving distance of the light curtain, and analyzing the light curtain received by the light curtain receiving end.
S102, judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the result is normal, executing step S104; if abnormal, step S103 is executed.
In this embodiment, the powder spreading state of the current printing layer can be determined according to the light curtain integrity received by the light curtain receiving end and the moving distance of the light curtain.
Optionally, when the moving distance of the light curtain is equal to a preset threshold value and the light curtain received by the light curtain receiving end is complete, determining that the current printing layer is normal;
and when the moving distance of the light curtain is not equal to a preset threshold value or the light curtain received by the light curtain receiving end is incomplete, determining that the current printing layer is abnormal.
And S103, generating a control signal for correspondingly adjusting the current printing layer according to the abnormal type.
In this embodiment, the abnormal type of the current printing layer is determined according to the moving distance of the light curtain and the integrity of the light curtain received by the light curtain receiving end. The exception types include: too thick a printed layer, too thin a printed layer, non-uniform a printed layer. And generating a corresponding control signal according to the type of the abnormity, and sending the control signal to a printing component of the 3D printer.
Optionally, when the moving distance of the light curtain is greater than a preset threshold and the light curtain received by the light curtain receiving end is complete, acquiring a first difference between the moving distance of the light curtain and the preset threshold, and removing a layer of powder with a thickness equal to the first difference from the current printing layer;
when the moving distance of the light curtain is smaller than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a second difference value between the preset threshold value and the moving distance of the light curtain, and adding a layer of powder with the thickness equal to the second difference value on the current printing layer;
when the light curtain received by the light curtain receiving end is incomplete, removing the powder printed on the current printing layer; and reprint the current layer according to the preset powder laying thickness.
And S104, printing the next layer.
In this embodiment, the powder spreading state of the current printing layer is measured through the light curtain, and whether the current printing layer is normal is judged according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality. Thereby realized monitoring the printing state of every layer of powder of 3D printer, in time discover and handle the printing layer of spreading the powder anomaly, guaranteed to print the quality of product.
Fig. 3 is a schematic structural diagram of a powder spreading state detection device of a 3D printer according to an embodiment of the present invention, and as shown in fig. 3, the device in this embodiment may include:
the laser thickness gauge 20 is used for measuring the powder spreading state of the current printing layer through a light curtain, wherein the light curtain is parallel to the printing plane of the 3D printer;
the processor 30 is used for judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality.
The processor in this embodiment may be a programmable logic controller PLC, a microprocessor, or a single chip microcomputer. Specifically, in this embodiment, a programmable logic controller PLC is taken as an example for explanation, and the PLC may perform data communication with each component of the 3D printer through an RS485 bus.
Optionally, the laser thickness gauge 20 is specifically configured to:
controlling the light curtain to move downwards from the height position of the adjacent last printing layer until the light curtain is received at the light curtain receiving end;
and recording the moving distance of the light curtain, and analyzing the light curtain received by the light curtain receiving end.
Optionally, the processor 30 is specifically configured to:
when the moving distance of the light curtain is equal to a preset threshold value and the light curtain received by the light curtain receiving end is complete, determining that the current printing layer is normal;
and when the moving distance of the light curtain is not equal to a preset threshold value or the light curtain received by the light curtain receiving end is incomplete, determining that the current printing layer is abnormal.
Optionally, the processor 30 is further configured to:
when the moving distance of the light curtain is greater than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a first difference value between the moving distance of the light curtain and the preset threshold value, and shoveling a layer of powder with the thickness equal to the first difference value on the current printing layer through a powder paving assembly;
when the moving distance of the light curtain is smaller than a preset threshold value and the light curtain received by the light curtain receiving end is complete, acquiring a second difference value between the preset threshold value and the moving distance of the light curtain, and adding a layer of powder with the thickness equal to the second difference value on the current printing layer through a powder laying assembly;
when the light curtain received by the light curtain receiving end is incomplete, the powder printed on the current printing layer is removed through the powder spreading assembly; and reprint the current layer according to the preset powder laying thickness.
In this embodiment, the powder spreading state of the current printing layer is measured by the light curtain emitted by the laser thickness gauge 20, and whether the current printing layer is normal is determined according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; and if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality. Thereby realized monitoring the printing state of every layer of powder of 3D printer, in time discover and handle the printing layer of spreading the powder anomaly, guaranteed to print the quality of product.
Fig. 4 is a top view of a powder spreading state detection device of a 3D printer according to a first embodiment of the present invention, and as shown in fig. 4, the device in this embodiment includes: the powder spreading component 1, the lifting component 2, the printing component 3, the powder box 4, the printer control mainboard 5, the laser thickness gauge, the programmable logic controller PLC 6, the RS485 bus 7 and the servo motor 8; wherein: and the programmable logic controller PLC 6 is electrically connected with the powder spreading assembly 1, the lifting assembly 2, the printing assembly 3 and the printer control mainboard 5 through an RS485 bus 7.
In one embodiment, the laser thickness gauge includes: the device comprises a laser emitter 11, a laser sensor 9 and a light curtain analyzer; the laser emitter 11 is located on one side of a printing plane of the 3D printer and used for emitting a light curtain; wherein, the height of the light curtain emitted by the laser emitter 11 is adjustable, or the height of the laser emitter 11 is adjustable. The laser sensor 9 is located on the other side of the printing plane of the 3D printer and used for receiving the light curtain emitted by the laser emitter 11 and sending the received light curtain to the processor. And the light curtain analyzer is used for recording the moving distance of the light curtain and analyzing the light curtain received by the laser sensor so as to obtain the powder spreading state of the current printing layer.
And the powder spreading assembly 1 is used for carrying out powder feeding, powder spreading and scraping operations or powder shoveling operations according to the control signal sent by the processor. And the lifting assembly 2 is used for controlling the height of the powder spreading assembly and/or the printing assembly according to the control signal sent by the processor. And the printer control main board 5 is used for generating a corresponding printing starting signal or a printing suspending signal according to the control signal sent by the processor, and sending the printing starting signal or the printing suspending signal to the printing component. The printing component 3 is used for executing printing operation according to a printing starting signal sent by the printer control main board; or pausing the current printing operation according to a pause printing signal sent by the printer control main board.
Optionally, the programmable logic controller PLC 6 may further store the detected thickness data of each printed layer, so as to analyze the printing process and ensure the printing quality of each layer.
This embodiment, realize the detection of spreading the powder state to each printing layer through programmable logic controller PLC and laser thickness meter cooperation, degree of automation is high, can in time discover to print the abnormal state on layer, repaiies the printing layer that appears unusually to the printing quality of product has been improved.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, as used herein, indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be of particular construction and operation, and therefore, should not be considered as limiting the invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The powder spreading state detection method of the 3D printer is characterized by comprising the following steps of:
measuring a powder spreading state of a current printing layer through a light curtain, wherein the light curtain is parallel to a printing plane of the 3D printer;
judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality;
the measuring of the powder spreading state of the current printing layer through the light curtain comprises the following steps:
controlling the light curtain to move downwards from the height position of the adjacent last printing layer until the light curtain is received at the light curtain receiving end;
and recording the moving distance of the light curtain, and analyzing the light curtain received by the light curtain receiving end.
2. The method according to claim 1, wherein the determining whether the current printing layer is normal according to the powder spreading state of the current printing layer comprises:
when the moving distance of the light curtain is equal to a preset threshold value and the light curtain received by the light curtain receiving end is complete, determining that the current printing layer is normal;
and when the moving distance of the light curtain is not equal to a preset threshold value or the light curtain received by the light curtain receiving end is incomplete, determining that the current printing layer is abnormal.
3. The utility model provides a powder state detection device that spreads of 3D printer which characterized in that includes:
the laser thickness gauge is used for measuring the powder spreading state of the current printing layer through a light curtain, wherein the light curtain is parallel to the printing plane of the 3D printer;
the processor is used for judging whether the current printing layer is normal or not according to the powder spreading state of the current printing layer; if the printing is normal, printing the next layer; if the current printing layer is abnormal, generating a control signal for correspondingly adjusting the current printing layer according to the type of the abnormality;
the laser thickness gauge is specifically used for:
controlling the light curtain to move downwards from the height position of the adjacent last printing layer until the light curtain is received at the light curtain receiving end;
and recording the moving distance of the light curtain, and analyzing the light curtain received by the light curtain receiving end.
4. The apparatus of claim 3, wherein the laser thickness gauge comprises: the system comprises a laser transmitter, a laser sensor and a light curtain analyzer;
the laser emitter is positioned on one side of a printing plane of the 3D printer and used for emitting a light curtain; the height of the light curtain emitted by the laser emitter is adjustable, or the height of the laser emitter is adjustable;
the laser sensor is positioned on the other side of the printing plane of the 3D printer and used for receiving the light curtain emitted by the laser emitter and sending the received light curtain to the processor;
and the light curtain analyzer is used for recording the moving distance of the light curtain and analyzing the light curtain received by the laser sensor so as to obtain the powder spreading state of the current printing layer.
5. The apparatus of claim 3, wherein the processor is specifically configured to:
when the moving distance of the light curtain is equal to a preset threshold value and the light curtain received by the light curtain receiving end is complete, determining that the current printing layer is normal;
and when the moving distance of the light curtain is not equal to a preset threshold value or the light curtain received by the light curtain receiving end is incomplete, determining that the current printing layer is abnormal.
6. The apparatus of claim 3, further comprising:
the powder spreading assembly is used for carrying out powder feeding, powder spreading and scraping operations or powder shoveling operations according to the control signal sent by the processor;
the lifting assembly is used for controlling the height of the powder spreading assembly and/or the printing assembly according to a control signal sent by the processor;
the printer control main board is used for generating a corresponding printing starting signal or a printing suspending signal according to the control signal sent by the processor and sending the printing starting signal or the printing suspending signal to the printing component;
the printing component is used for executing printing operation according to a printing starting signal sent by the printer control main board; or pausing the current printing operation according to a pause printing signal sent by the printer control main board.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326332.9A CN109910299B (en) | 2017-12-13 | 2017-12-13 | Powder spreading state detection method and device of 3D printer |
| PCT/CN2018/101799 WO2019114318A1 (en) | 2017-12-13 | 2018-08-22 | Powder laying state detection method and device for 3d printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326332.9A CN109910299B (en) | 2017-12-13 | 2017-12-13 | Powder spreading state detection method and device of 3D printer |
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| Publication Number | Publication Date |
|---|---|
| CN109910299A CN109910299A (en) | 2019-06-21 |
| CN109910299B true CN109910299B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711326332.9A Active CN109910299B (en) | 2017-12-13 | 2017-12-13 | Powder spreading state detection method and device of 3D printer |
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| WO2017005675A1 (en) * | 2015-07-09 | 2017-01-12 | Siemens Aktiengesellschaft | Method for monitoring a process for powder-bed based additive manufacturing of a component and such a system |
| CN106925785A (en) * | 2017-05-08 | 2017-07-07 | 长沙新材料产业研究院有限公司 | A kind of 3D printing equipment and control method |
| CN206573076U (en) * | 2017-02-20 | 2017-10-20 | 北京恒尚科技有限公司 | A kind of special substrate of SLM device, scraper relative position measurement device |
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| CN103128041B (en) * | 2013-02-07 | 2014-09-10 | 华南理工大学 | Full automatic fluorescent powder coating process and device |
| CN104669618A (en) * | 2013-11-30 | 2015-06-03 | 西安中科麦特电子技术设备有限公司 | Control system for 3D printing rapid prototyping device |
| CN106041080B (en) * | 2016-07-21 | 2018-01-16 | 中北大学 | Dusty material laser sintering (SLS) device |
| CN106626377B (en) * | 2016-10-25 | 2019-08-30 | 天津清研智束科技有限公司 | The increasing material manufacturing method and increasing material manufacturing device of real-time detection powder bed surface deformation |
| CN106564187B (en) * | 2016-11-10 | 2019-10-01 | 湖南华曙高科技有限责任公司 | A kind of method and apparatus manufacturing three-dimension object |
| CN107364120B (en) * | 2017-08-16 | 2019-06-21 | 深圳市洛众科技有限公司 | A kind of contactless 3D printing consumptive material condition detection method |
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| WO2017005675A1 (en) * | 2015-07-09 | 2017-01-12 | Siemens Aktiengesellschaft | Method for monitoring a process for powder-bed based additive manufacturing of a component and such a system |
| CN206573076U (en) * | 2017-02-20 | 2017-10-20 | 北京恒尚科技有限公司 | A kind of special substrate of SLM device, scraper relative position measurement device |
| CN106925785A (en) * | 2017-05-08 | 2017-07-07 | 长沙新材料产业研究院有限公司 | A kind of 3D printing equipment and control method |
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