CN108081615B - Automatic rotatory detecting system - Google Patents
Automatic rotatory detecting system Download PDFInfo
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- CN108081615B CN108081615B CN201711321885.5A CN201711321885A CN108081615B CN 108081615 B CN108081615 B CN 108081615B CN 201711321885 A CN201711321885 A CN 201711321885A CN 108081615 B CN108081615 B CN 108081615B
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- 230000007246 mechanism Effects 0.000 claims abstract description 21
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- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 239000002356 single layer Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 44
- 238000004891 communication Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000032798 delamination Effects 0.000 description 22
- 239000000463 material Substances 0.000 description 11
- 238000010146 3D printing Methods 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 239000002699 waste material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
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- 235000019219 chocolate Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 235000011850 desserts Nutrition 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
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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
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
An automatic rotation detection system comprises a laser emitter and a sensor, wherein the laser emitter and the sensor are respectively arranged on a laser emission plate and a sensing plate, the laser emission plate and the sensing plate are horizontally arranged on two sides of a working platform of a 3D printer in an opposite mode, the laser emission plate and the sensing plate are further connected with a rotating mechanism, and the rotating mechanism can drive the laser emission plate and the sensing plate to rotate around the center of the working platform; the laser monitoring system comprises a sensor, a laser emitter, a control unit and a working module, wherein the sensor is connected with the control unit, the laser emitter is connected with the control unit, the control unit is also used for receiving the working information of the 3D printer after the single-layer printing is finished, storing and monitoring the laser sensitive state from the laser emitter to the sensor in the process that the rotating mechanism rotates around the working platform, and the control unit is also connected with the working module of the 3D printer in a control mode; the problem of prior art can't detect 3D and print the delaminating is solved.
Description
Technical Field
The invention relates to the field of 3D printing, in particular to a system capable of automatically and rotatably detecting whether a printed product of a 3D printer is delaminated.
Background
The 3D printing technology for hot-water is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and printing layer by layer on the basis of a digital model file. 3D printers appeared in the mid-90's of the last century, a rapid prototyping device using technologies such as photocuring and paper lamination. The printing machine is basically the same as a common printing machine in working principle, the printing machine is filled with liquid or powder and other printing materials, the printing materials are overlapped layer by layer under the control of a computer after being connected with the computer, and finally a blueprint on the computer is changed into a real object. This technology is now used in many areas to make garments, architectural models, automobiles, chocolate desserts, and the like.
Due to the performance limitation of the selectable printing materials, in the layer-by-layer printing process of 3D printing, if the material adhesion is too good, the material cannot be taken down from the working platform, and if the material adhesion is too poor, the problem of adhesion separation between different printing layers generated in the printing process can be caused, once the adhesion separation occurs, the whole model becomes a waste product, the working progress is greatly influenced, and the material is wasted.
Disclosure of Invention
Therefore, a product delamination detection system for 3D printing needs to be provided, and the problem that the 3D printing delamination cannot be detected in the prior art is solved.
An automatic rotation detection system comprises a laser emitter and a sensor, wherein the laser emitter and the sensor are respectively arranged on a laser emission plate and a sensing plate, the laser emission plate and the sensing plate are horizontally arranged on two sides of a working platform of a 3D printer in an opposite mode, the laser emission plate and the sensing plate are further connected with a rotating mechanism, and the rotating mechanism can drive the laser emission plate and the sensing plate to rotate around the center of the working platform; the laser monitoring system comprises a sensor, a laser emitter, a control unit and a working module, wherein the sensor is connected with the control unit, the laser emitter is connected with the control unit, the control unit is also used for receiving the working information of the 3D printer after the single-layer printing is finished, storing and monitoring the laser sensitive state from the laser emitter to the sensor in the process that the rotating mechanism rotates around the working platform, and the control unit is also connected with the working module of the 3D printer in a control mode;
the control unit is used for receiving a printing completion instruction of the 3D printer; the laser sensitive state recording module is also used for recording the laser sensitive state from the laser emitter to the sensor of the corresponding layer in one rotation after receiving the printing completion instruction; and the 3D printer working module is also used for controlling the 3D printer working module to stop printing when the monitored real-time photosensitive state information is not matched with the recorded photosensitive state of the sensor.
Specifically, the device comprises a plurality of pairs of laser emitters and sensors, wherein the laser emitters and the sensors are arranged on a laser emitting plate and a sensor plate respectively, and the interlayer spacing of the laser emitters and the sensors in the array in the height direction is matched with the thickness of a 3D printed printing layer.
Preferably, the row spacing of the laser emitters at the two ends of the laser emitting plate is smaller than the row spacing of the laser emitters at the center; the row spacing of the sensors at the two ends of the sensor board is smaller than the row spacing of the sensors at the center.
Optionally, the real-time photosensitive state information includes a current rotation time, a current rotation phase, and whether the current photosensitive state is light-shielding or light-transmitting.
The monitoring device comprises a laser emitter and a sensor, and is characterized by further comprising an alarm unit, wherein the alarm unit is connected with the control unit and used for sending an alarm signal when the control unit monitors the change of the recorded photosensitive states of the laser emitter and the sensor.
Specifically, the alarm signal is a sound, light or electric signal and is sent out through bluetooth, WiFi, 3G, 4G or 5G communication.
Different from the prior art, the above technical scheme effectively prevents the problem of material waste and energy waste caused by untimely delamination of the detection workpiece which possibly occurs in the 3D printing process by designing the characteristics of whether the laser sensor is used for rotatably detecting the workpiece and transmitting light or not and adding corresponding control logic in the control unit of the 3D printer.
Drawings
FIG. 1 is a flow chart of a delamination rotation detection method according to an embodiment;
FIG. 2 is a diagram of a delamination rotation detection system according to an embodiment;
FIG. 3 is a diagram of a delamination rotation detection system according to an embodiment.
Description of reference numerals:
1. a working platform;
2. a laser emitting plate;
21. a laser transmitter;
3. a sensor board;
4. a rotating mechanism;
5. a printhead.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, a 3D printed product delamination detection method is described, including the following steps,
s100, receiving a single-layer printing completion instruction of the 3D printer;
s102, controlling the laser emitter and the sensor to rotate for a circle around the working platform, and recording the laser sensitive state from the laser emitter on the corresponding layer to the sensor in the circle of rotation;
s104, in a working state, the laser emitter and the sensor continuously rotate around the working platform, and the real-time photosensitive state information of the sensor is monitored;
and S106, when the monitored real-time photosensitive state information does not match the recorded photosensitive state of the sensor, controlling the 3D printer to stop printing.
The method can be applied to a 3D printed product delamination detection device as shown in fig. 2, where we can see that the working table 1 of the 3D printing device is arranged under the printing head 5 of the printer for receiving the coated product of the printing head. The laser emitter 21 and the sensor are arranged opposite to each other in the horizontal direction of the workbench of the 3D printer, in the embodiment, the emitter and the sensor can be arranged on two laser emitting plates 2 and a sensing plate 3 which are arranged oppositely, and the laser emitting plates and the sensing plate are vertically arranged and are arranged on two sides of the workbench in parallel in the horizontal direction. The laser emission plate and the sensing plate can rotate around the center of the working platform through the rotating mechanism 4. The laser emitting plate and the sensor plate are respectively provided with a laser emitter array and a sensor array, and the optical signals emitted by the laser emitters on each array can be always received by the unique sensor under the condition that the workbench is not shielded. Meanwhile, the interlayer spacing of the laser emitters and the sensors arranged on different layers on the array in the height direction is matched with the thickness of the 3D printed printing layer.
In some embodiments shown in fig. 1, the method may also begin with the steps of turning on the array of laser emitters and the array of sensors and allowing the rotation mechanism to begin rotating, at which time all of the sensors will be shown as being in a light-sensitive state regardless of the current angle of rotation. We do not record the fully photosensitive state until the 3D printer prints, and after sending the first layer printing completion instruction to the control unit, we proceed step S100 to receive the first layer (single layer or bottom layer) printing completion instruction of the 3D printer, and then proceed step S102 to record the photosensitive state of the sensor arranged in the bottom row of the sensor array when rotating around the platform for one circle, at this time, since the workpiece has been printed out one layer, there is inevitably a part of the light path of the sensor blocked when the rotating mechanism rotates to a specific angle, so the photosensitive state can include various information such as the rotating angle, the current position, the rotating time, whether the sensor is blocked, etc., for example, in some cases, when the photosensitive state is at the rotating angle of 0-270 °, the sensor cannot receive the signal of the laser transmitter, when the rotating angle of 270-, the sensor is not hindered from sensing light. If the time of the rotation period is 12S, the light sensing state is that the sensor receives the signal which can not receive the laser emitter within 0-9S in one rotation period, and the light sensing of the sensor is not blocked within the time of the rotation period of 9-12S, and the like. The photosensitive state of the sensor on the corresponding layer in one circle around the working platform is stored, which is equivalent to recording the shape and appearance of the workpiece on the working platform in the 360-degree direction. Further, after each layer of the 3D printer head is coated, step S102 may be performed to record the laser-sensitive state from the laser emitter to the sensor of the corresponding layer within one rotation; the corresponding layer here is of course related to the current printed layer, and is actually determined as the bottom layer, the second layer, the third layer, the tenth layer, and so on. Step S104 is carried out again, and the real-time laser photosensitive state of the sensor under continuous rotation is monitored; if the control units of multiple groups are in the process of continuous printing, step S106 is also continuously carried out, and when the monitored real-time photosensitive state information of any pair of the laser emitters and the sensors does not match the recorded photosensitive state information, the 3D printer is informed to stop printing. Simply, delamination is caused by the fact that the material itself is pulled more than the adhesive force between the printed layers due to the tension in the printed layers, and appears as a phenomenon of detachment, delamination, lifting, curling, etc. of the different printed layers. This often occurs at the edges of the layers of the workpiece, often as an up-and-down tear, causing a crack in the otherwise opaque workpiece that is transparent to light. Therefore, the sensor at the corresponding position can sense the originally shielded laser, so as to send out a signal. If the sensor in the above case receives the light signal in the unobstructed manner within the 8-12S rotation time, it is monitored that the surface of the workpiece being printed on the working platform is changed greatly, and delamination is likely to occur! The method directly informs the printing head of the 3D printer to stop printing when the control unit judges that the received sensor photosensitive state information is not matched with the record. By the method, the next printing of the workpiece is immediately stopped after the delamination condition of the printing occurs, raw materials are prevented from being further wasted, the phenomenon that the whole workpiece after delamination becomes waste is avoided, and electric energy is wasted. The problem of can't detect the delaminating situation of the printing in-process of 3D printer among the prior art is solved.
In a specific application, the laser emitter array and the sensor array may be started before the step S100 receives the printing completion instruction, or may be started later, because what is actually performed in the step S102 is to record the photosensitive change condition of the sensor array after printing is completed, and the sensors and emitters of the corresponding layer only need to be started before recording is needed, so in some other embodiments of the method, the started laser emitters and sensors do not start the whole laser emitter array or the whole sensor array, but start a single row of laser emitters and sensors opposite to the current layer to be printed; and by repeating the steps S100, S102 and S104, the effect of sequentially starting different single-row emitters and sensors from the bottom layer to the upper layer is achieved, and the number of the rows is increased by the number of the layers, so that the problem of energy waste caused by the idle consumption of the laser emitters and the sensors at the upper layer can be solved.
In some embodiments, the first layer height of the laser emitter array and the sensor array is the same as the height of the substrate of the 3D printer, and is used to detect delamination of the substrate and layers above the substrate, and not to detect bonding between the substrate and the work platform of the 3D printer. In the practical application process, the adhesion between the base layer printing layer and the working platform is found and the delamination does not occur frequently, so that the design can better aim at the delamination problem generated in the product, and the design cost is saved.
In a further embodiment, the method further comprises the step of sending out an alarm signal after detecting the change of the photosensitive state of the sensor. Since 3D printing times are all long, typically up to four to five hours. It is necessary that an alarm unit is present, which can send out an alarm signal, and has the functions of sending out recognizable signals and communication, wherein the recognizable signals comprise sound, light, electric and mechanical signals, and also can be virtual codes, instructions, short messages and the like, and the communication functions comprise Bluetooth communication, wifi communication, 2G, 3G, 4G, 5G communication modes and the like. By the means, the user can receive the notice when the workpiece has printing problems and can timely obtain feedback, and the workpiece replacement, raw material supplement and the like can be conveniently carried out by the user. The arrangement ensures that the scheme of the invention is more humanized and has more practicability and convenience.
Referring to fig. 2, there is shown an apparatus suitable for the above method, which includes a laser emitting plate 2 and a sensing plate 3 horizontally disposed on two sides of a working platform 1 of a 3D printer, wherein a laser emitter 21 and a sensor (not shown in the angle relationship) are disposed on the laser emitting plate and the sensing plate, respectively, and in a special case, at least one pair of the laser emitter and the sensor is disposed, even a single pair of laser emitters and sensors can be provided to detect delamination of a portion of a particular layer height of a workpiece, however, in order to fully detect the quality of the workpiece, the preferred embodiment includes a plurality of pairs of laser emitters and sensors, which are respectively arranged on the laser emitting plate 2 and the sensing plate 3 in a one-to-one correspondence to form an array of laser emitters and an array of sensors, and the height distance between the laser emitters and the sensors of each layer in the array is adapted to the coating thickness of the printer. The laser emission plate 2 and the sensing plate 3 are also connected with a rotating mechanism 4, and the rotating mechanism can drive the laser emission plate and the sensing plate to rotate around the center of the working platform; the laser monitoring system comprises a sensor, a laser emitter, a control unit and a working module, wherein the sensor is connected with the control unit, the laser emitter is connected with the control unit, the control unit is also used for receiving the working information of the 3D printer after the single-layer printing is finished, storing and monitoring the laser sensitive state from the laser emitter to the sensor in the process that the rotating mechanism rotates around the working platform, and the control unit is also connected with the working module of the 3D printer in a control mode; the control unit is used for receiving a printing completion instruction of the 3D printer; the laser sensitive state recording module is also used for recording the laser sensitive state from the laser emitter to the sensor of the corresponding layer in one rotation after receiving the printing completion instruction; and the 3D printer working module is also used for controlling the 3D printer working module to stop printing when the monitored real-time photosensitive state information is not matched with the recorded photosensitive state of the sensor. Through the design of the device and the logic control of the control unit, the situation that the delamination of the detection workpiece is not timely possibly generated in the 3D printing process is restrained, and the problems of material waste and energy waste can be solved.
In a preferred embodiment, as shown in fig. 2, the laser emitting plate 2 and the sensing plate 3 are both arranged vertically and horizontally, which can better correspond to the printing layer of the printer. In a specific embodiment, the rotating mechanism only needs to provide power to enable the laser emission plate and the sensing plate to perform circular motion, and may be a sliding rail slider, as shown in fig. 2, the rotating mechanism 4 provides a circular sliding rail, the laser emission plate and the sensing plate are fixed on different sliding blocks, and the rotating mechanism drives the laser emission plate and the sensing plate to perform circular motion by setting the induction motor to drive the sliding blocks to move on the sliding rail. In the embodiment shown in fig. 3, the rotating mechanism 4 may also be a rotating shaft and rotating arm structure, two ends of the rotating arm are respectively fixed to the laser emitting plate and the sensing plate, the middle of the rotating arm is fixed to the rotating shaft, and the rotating shaft can be driven by a motor to rotate, so as to drive the laser emitting plate and the sensing plate on the rotating arm to perform circular motion. Through the arrangement of the rotating mechanism, the system achieves the technical effect that the outer end of the working platform is provided with the rotatable laser emitting plate and the rotatable sensing plate. The workpiece delamination detection device is beneficial to better rotating, monitoring and detecting the delamination condition of the workpiece on the working platform.
In the embodiment shown in fig. 2, the row pitch of the laser emitters on the laser emission panel 2 at both ends is smaller than the row pitch of the laser emitters at the center; the row spacing of the sensors at the two ends of the sensor board is smaller than the row spacing of the sensors at the center. In the figure, no matter the first laser emitting plate 2 or the second laser emitting plate 4, the density of the laser emitters arranged on the two sides of the plate is higher than that arranged in the middle of the plate, because delamination often occurs at the edge part of a printed product in the actual printing process, and the detection precision and the accuracy of the product of the invention on the delamination phenomenon of the edge of a workpiece can be obviously improved by optimizing and densely arranging the laser emitter rows on the two sides.
In the preferred embodiment shown in fig. 2, the system further comprises an alarm unit, wherein the alarm unit can send out an alarm signal, and has the functions of sending out identifiable signals and communication, wherein the identifiable signals comprise sound, light, electric and mechanical signals, and also can be virtual codes, instructions, short messages and the like, and the communication functions comprise bluetooth communication, WiFi communication, 2G, 3G, 4G, 5G communication modes and the like. By the means, the user can receive the notice when the workpiece has printing problems and can timely obtain feedback, and the workpiece replacement, raw material supplement and the like can be conveniently carried out by the user. The system is more humanized, and has more practicability and convenience due to the arrangement.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (3)
1. An automatic rotation detection system is characterized by comprising a laser emitter and a sensor, wherein the laser emitter and the sensor are respectively arranged on a laser emitting plate and a sensing plate, the laser emitting plate and the sensing plate are horizontally and oppositely arranged on two sides of a working platform of a 3D printer, a working table of the 3D printer is arranged below a printing head of the printer and used for bearing coated products of the printing head, the laser emitting plate and the sensing plate are also connected with a rotating mechanism, and the rotating mechanism can drive the laser emitting plate and the sensing plate to rotate around the center of the working platform; the laser monitoring system comprises a sensor, a laser emitter, a control unit and a working module, wherein the sensor is connected with the control unit, the laser emitter is connected with the control unit, the control unit is also used for receiving the working information of the 3D printer after the single-layer printing is finished, storing and monitoring the laser sensitive state from the laser emitter to the sensor in the process that the rotating mechanism rotates around the working platform, and the control unit is also connected with the working module of the 3D printer in a control mode;
the control unit is used for receiving a printing completion instruction of the 3D printer; the laser sensitive state recording module is also used for recording the laser sensitive state from the laser emitter to the sensor of the corresponding layer in one rotation after receiving the printing completion instruction; the 3D printer is also used for controlling the working module of the 3D printer to stop printing when the monitored real-time photosensitive state information is not matched with the recorded photosensitive state of the sensor;
the device comprises a plurality of pairs of laser emitters and sensors, wherein a laser emitter array and a sensor array are arranged on a laser emitting plate and a sensor plate respectively, and the interlayer spacing of the laser emitters and the sensors in the array in the height direction is matched with the thickness of a 3D printed printing layer;
the row spacing of the laser emitters at the two ends of the laser emitting plate is smaller than the row spacing of the laser emitters at the center; the row spacing of the sensors at the two ends of the sensing plate is smaller than the row spacing of the sensors at the center; the real-time photosensitive state information comprises current rotation time, current rotation phase and whether the current photosensitive state is shading or light-transmitting.
2. The automatic rotation detection system of claim 1, further comprising an alarm unit, wherein the alarm unit is connected to the control unit, and the alarm unit is configured to send an alarm signal when the control unit monitors the change in the recorded light sensing states of the laser emitter and the sensor.
3. The automatic rotation detection system of claim 2, wherein the alarm signal is an acoustic, optical or electrical signal and is sent out through bluetooth, WiFi, 3G, 4G or 5G communication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711321885.5A CN108081615B (en) | 2017-12-12 | 2017-12-12 | Automatic rotatory detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711321885.5A CN108081615B (en) | 2017-12-12 | 2017-12-12 | Automatic rotatory detecting system |
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| CN108081615B true CN108081615B (en) | 2020-07-03 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000127251A (en) * | 1998-10-30 | 2000-05-09 | Yamanashi Prefecture | Three-dimensional molding machine and its molding method |
| CN105014965A (en) * | 2014-04-29 | 2015-11-04 | 三纬国际立体列印科技股份有限公司 | Three-dimensional printing device |
| CN206273586U (en) * | 2016-12-16 | 2017-06-23 | 深圳晗竣雅科技有限公司 | A kind of polychrome photocuring 3D printer |
-
2017
- 2017-12-12 CN CN201711321885.5A patent/CN108081615B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000127251A (en) * | 1998-10-30 | 2000-05-09 | Yamanashi Prefecture | Three-dimensional molding machine and its molding method |
| CN105014965A (en) * | 2014-04-29 | 2015-11-04 | 三纬国际立体列印科技股份有限公司 | Three-dimensional printing device |
| CN206273586U (en) * | 2016-12-16 | 2017-06-23 | 深圳晗竣雅科技有限公司 | A kind of polychrome photocuring 3D printer |
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Effective date of registration: 20221206 Address after: 213000 No. 58, Tongjiang South Road, Hehuachi Street, Zhonglou District, Changzhou City, Jiangsu Province (business location: No. 6, Mumu Road, Zhonglou District, Changzhou City) Patentee after: Changzhou Suweihang HVAC Technology Co.,Ltd. Address before: 350299 302, Block 3, Underground First Area, Liancun Village, Kuiqiao Road, Changle District, Fuzhou City, Fujian Province Patentee before: Xu Suxiang |
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