CN111636688A - Intelligent control system and method for extrusion state of 3D printing nozzle of building - Google Patents
Intelligent control system and method for extrusion state of 3D printing nozzle of building Download PDFInfo
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- CN111636688A CN111636688A CN202010487889.6A CN202010487889A CN111636688A CN 111636688 A CN111636688 A CN 111636688A CN 202010487889 A CN202010487889 A CN 202010487889A CN 111636688 A CN111636688 A CN 111636688A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
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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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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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
Abstract
The invention discloses an intelligent control system and method for the extrusion state of a 3D printing nozzle of a building, wherein the intelligent control system comprises a liquid level sensor, a viscosity sensor, an electromagnetic flowmeter, a pressure sensor and an intelligent control device; the liquid level sensor is arranged in the screw pump storage bin and is used for monitoring the liquid level in the screw pump storage bin; the viscosity sensor is arranged in the screw pump storage bin and is used for monitoring the viscosity of the slurry; the electromagnetic flow meter is arranged between the spray head and the screw pump and is used for monitoring the extrusion speed of the slurry; the pressure sensor is arranged in the spray head and used for monitoring the pressure of slurry on the spray head during extrusion; the liquid level height sensor, the viscosity sensor, the electromagnetic flowmeter and the pressure sensor are connected with an intelligent control device, and the intelligent control device is connected with the screw pump and the material conveying system. The intelligent monitoring system can intelligently monitor the printing state of the printing material, adapt to the optimal printing material, intelligently regulate and control the extrusion speed of the printing material and terminate abnormal printing.
Description
Technical Field
The invention belongs to the technical field of building 3D printing, and particularly relates to an intelligent control system and method for the extrusion state of a 3D printing nozzle of a building.
Background
At present, the building 3D technology is in the key industry starting stage, has been completely open in public buildings, decorative buildings, emergency buildings, customized buildings and the like, and is in the transition stage from laboratories to commercialization.
Traditional 3D printing technique mainly is applied to small-size product fields such as medical treatment, accessories, and it is not more than the part of storage silo volume according to the certain volume of printing out that the size of storage silo lasts, and is different with traditional 3D printing mode, and large-scale building printing work has decided that the printing nozzle will have the extrusion capacity who lasts the feed. In the whole process of conveying and extruding the building material, the printing material at the outlet is easily blocked due to the reduction of the sectional area of the channel at the extrusion outlet of the spray head, the reinforcing fibers are often required to be added in the process of printing the building material (concrete, mortar and the like), the reinforcing fibers in the printing material are directionally oriented (arranged along the printing direction) in the process of conveying the printing material, and the orientation action is intensified due to the reduction of the sectional area at the extrusion outlet, so that aggregates in the building material, particularly the concrete, are accumulated at the extrusion outlet to cause blockage.
The 3D printing nozzle is a core component of a 3D printing technology of a building, the nozzle can uniformly extrude printing materials on the premise of printing, the speed of extruding the printing materials by the nozzle is related to a plurality of factors, and the current control on the factors basically adopts a method of repeated adaptation and manual monitoring regulation and control, which is not beneficial to saving manpower and keeping the stability of the printing process.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an intelligent control system for the extrusion state of a 3D printing nozzle of a building, which can intelligently regulate and control the extrusion speed of the 3D printing nozzle of the building, intelligently monitor the printable state of slurry and ensure the stability of the printing process. In addition, the invention also provides an intelligent control method for the extrusion state of the 3D printing nozzle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an intelligent control system for the extrusion state of a 3D printing nozzle of a building, which comprises a liquid level sensor, a viscosity sensor, an electromagnetic flowmeter, a pressure sensor and an intelligent control device, wherein the liquid level sensor is connected with the intelligent control device;
the liquid level sensor is arranged in the screw pump storage bin and is used for monitoring the liquid level in the screw pump storage bin;
the viscosity sensor is arranged in the screw pump storage bin and is used for monitoring the viscosity of the slurry;
the electromagnetic flow meter is arranged between the spray head and the screw pump and is used for monitoring the extrusion speed of the slurry;
the pressure sensor is arranged in the spray head and used for monitoring the pressure of slurry on the spray head during extrusion;
the liquid level sensor, the viscosity sensor, the electromagnetic flowmeter and the pressure sensor are connected with the intelligent control device, and the intelligent control device is connected with the screw pump and the material conveying system.
As a preferable technical solution, the liquid level sensor includes a first liquid level sensor and a second liquid level sensor, the first liquid level sensor is located above the second liquid level sensor, and the first liquid level sensor and the second liquid level sensor form a liquid level stopper.
As a preferable technical scheme, the intelligent control device further comprises an alarm unit, and the alarm unit is connected with the intelligent control device.
As a preferable technical scheme, the intelligent control device further comprises a display unit, and the display unit is connected with the intelligent control device.
The second aspect of the invention provides an intelligent control method for the extrusion state of a building 3D printing nozzle, which adopts the intelligent control system for the extrusion state of the building 3D printing nozzle and comprises the following steps:
s1, collecting concrete printing state data and adapting to 3D printing concrete;
s2, monitoring the printing state of the concrete;
and S3, intelligently regulating and controlling the extrusion state of the concrete.
As a preferred technical scheme, in step S1, the mixed concrete with different proportions is added into a screw pump storage bin for trial printing, in the printing process, a viscosity sensor and a pressure sensor acquire viscosity data and extrusion pressure data of the concrete in real time and send the data to an intelligent control device for recording, and the actual printing state corresponds to the viscosity data and the extrusion pressure data, so as to obtain printing parameters suitable for 3D printing of the concrete and record the printing parameters.
As a preferred technical solution, in the step S1, in the process of performing the print job, the intelligent control device records the viscosity data and the extrusion pressure data of the concrete in real time and corresponds to the real-time printing state, continuously optimizes and records the print parameters, and controls the print parameters of the concrete in the print data in the subsequent print job.
As a preferred technical solution, in the step S2, a rated extrusion pressure range and a rated viscosity range of the concrete are obtained according to the concrete printing state data collected in the step S1, and in the printing process, if the extrusion pressure data collected by the pressure sensor exceeds the rated extrusion pressure range or the viscosity data collected by the viscosity sensor exceeds the rated viscosity range, the intelligent control device sends an instruction to stop the printing operation; if the extrusion pressure data collected by the pressure sensor is within the rated extrusion pressure range and the viscosity data collected by the viscosity sensor is within the rated viscosity range, the process proceeds to step S3.
As a preferable technical scheme, in the step S3, if the slurry level in the screw pump storage bin is lower than the liquid level sensor, the intelligent control device sends an instruction to the material conveying system, and the material conveying system increases the conveying speed of the slurry; if the slurry level in the screw pump storage bin is higher than the liquid level sensor, the intelligent control device sends an instruction to the material conveying system, and the material conveying system reduces the conveying speed of the slurry.
As a preferred technical solution, in the step S3, if the extrusion speed data acquired by the electromagnetic flowmeter is less than the rated extrusion speed, the intelligent control device sends an instruction to accelerate the rotation speed of the screw pump; if the extrusion speed data collected by the electromagnetic flowmeter is greater than the rated extrusion speed, the intelligent control device sends out an instruction to reduce the rotating speed of the screw pump.
The large-scale building printing work determines that the printing nozzle has continuous feeding and extruding capacity, so that the screw pump is selected as the extruding mechanism, and through analysis, the liquid level height in the screw pump storage bin, the rotating speed of the screw pump and the rheological property of concrete slurry are main factors influencing the concrete printing effect. The invention adopts the liquid level sensor and the material conveying system to control the liquid level of the slurry within a certain range, and then accurately controls the extrusion flow through the rotation speed of the micro-adjustment screw pump of the electromagnetic flow meter and the screw pump, thereby achieving the purpose of uniformly extruding the concrete slurry.
Once the building material is mixed and used, the working performance of the building material cannot be adjusted, so that the pressure sensor is mainly arranged for three purposes: firstly, extrusion pressure data of slurry is collected and is in one-to-one correspondence with the extrusion state of concrete, so that rated extrusion pressure is obtained and is used as a control parameter of 3D printing operation; secondly, monitoring the extrusion state of the slurry in real time, and combining the actual printing state to guide the preparation of the next batch of slurry; and thirdly, along with the change of printing time and environment, the working performance of the printing material can be changed, the extrusion state of the slurry is monitored in real time, whether the slurry meets the printing requirement is judged, and when the slurry does not meet the printing requirement, the printing operation is stopped.
The viscosity sensor is arranged for monitoring and judging whether the printing material meets the printing requirement through the intelligent control device so as to maintain the safety of equipment, ensure the quality of a printed finished product and acquire viscosity information for configuration and optimization of printing raw materials.
Compared with the prior art, the invention has the beneficial effects that:
(1) the intelligent monitoring system can intelligently monitor the printing state of the printing material, collect the printing state data of the printing material, parameterize the printing state of the printing material, adapt to the optimal printing material, intelligently regulate and control the extrusion speed of the printing material and terminate abnormal printing.
(2) According to the invention, the printing parameters are continuously optimized in the printing process, and the subsequent printing work controls the printing parameters of the concrete to be continuously matched with the good mixing ratio of the printing materials in the printing data, so that the finished product effect of the concrete is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an intelligent control system for the extrusion state of a 3D printing nozzle of a building according to the present invention.
Fig. 2 is a schematic diagram of an intelligent control system for the extrusion state of a 3D printing nozzle of the building.
Wherein the reference numerals are as follows: the device comprises a feed inlet 1, a first liquid level sensor 2, a second liquid level sensor 3, a viscosity sensor 4, a screw pump storage bin 5, a screw pump 6, an electromagnetic flowmeter 7 and a pressure sensor 8.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The embodiment provides a building 3D prints shower nozzle extrusion state intelligence control system, including first liquid level sensor 2, second liquid level sensor 3, electromagnetic flow meter 7, pressure sensor 8 and intelligent control device, intelligent control device connects screw pump 6, defeated material system, display element and alarm unit. The material conveying system is connected with a feed inlet 1 of the screw pump storage bin 5.
The first liquid level sensor 2 and the second liquid level sensor 3 are used for monitoring the liquid level of slurry in the screw pump storage bin 5 and transmitting monitoring data to the intelligent control device in a wireless or wired mode in real time, and the intelligent control device adjusts the conveying speed of the slurry according to the liquid level data and controls the liquid level in the screw pump storage bin 5 within a certain range. The first liquid level sensor 2 and the second liquid level sensor 3 are arranged on the wall of the screw pump storage bin 5 or other positions capable of being fixed in the screw pump storage bin 5, the first liquid level sensor 2 is located above the second liquid level sensor 3, the first liquid level sensor 2 and the second liquid level sensor 3 jointly form a slurry liquid level limiter, when the liquid level is higher than the first liquid level sensor 2, the intelligent control device transmits signals to the material conveying system to enable the material conveying system to slow down the conveying speed, when the liquid level is lower than the second liquid level sensor 3, the intelligent control device transmits signals to the material conveying system to enable the material conveying system to speed up the conveying speed, and the slurry liquid level is controlled between the first liquid level sensor 2 and the second liquid level sensor 3.
The viscosity sensor 4 is used for monitoring the viscosity of slurry in the screw pump storage bin 5, monitoring data are transmitted to the intelligent control device in a wireless or wired mode in real time, and the intelligent control device displays the real-time printing state of the slurry according to the viscosity data. Viscosity sensor 4 installs other positions that can fix in screw pump storage silo 5's top or screw pump storage silo 5, and intelligent control device can compare the viscosity data that the ground paste viscosity data and system set up are fit for printing to show on the display screen, when the ground paste viscosity is not fit for printing, trigger alarm function.
The electromagnetic flow meter 7 is used for monitoring the extrusion speed of the slurry and transmitting the monitoring data to the intelligent control device in a wireless or wired mode in real time, and the intelligent control device adjusts the rotating speed of the screw pump 6 according to the extrusion speed. The electromagnetic flow meter 7 is arranged between the screw pump 6 and the spray head, can acquire the extrusion speed of the slurry in real time, can set the extrusion speed v, and is controlled by the intelligent control device to be within the range of v +/-s, when the extrusion speed is higher than v +, the intelligent control device transmits a signal to the screw pump 6 to enable the screw pump 6 to slow down the rotating speed, and when the extrusion speed is lower than v-, the intelligent control device transmits a signal to the screw pump 6 to enable the screw pump 6 to accelerate the rotating speed, so that the extrusion speed of the slurry is controlled to be between v + and v-.
The pressure sensor 8 is used for monitoring the pressure of the slurry to the spray head when the slurry is extruded, monitoring data are transmitted to the intelligent control device in a wireless or wired mode in real time, the intelligent control device displays the extrusion state of the slurry according to the pressure data, and the printing work is stopped when the pressure is too high. Pressure sensor 8 sends intelligent control device extrusion pressure data to, and intelligent control device can be with the ground paste extrusion pressure data and the extrusion pressure data that the system set up is fit for printing contrast to show on the display screen, when ground paste extrusion pressure is unsuitable to be printed, trigger alarm function, when ground paste extrusion pressure is too big, stop print work.
The first liquid level sensor 2, the second liquid level sensor 3 and the electromagnetic flow meter 7 all belong to an intelligent extrusion speed regulation system, the extrusion speed of the slurry is intelligently regulated, and the purpose of uniformly extruding the slurry is achieved. The viscosity sensor 4 and the pressure sensor 8 both belong to a printing state intelligent monitoring system, and the printing state of the slurry is intelligently monitored, so that the purpose of monitoring the printable state of the slurry in real time is achieved.
Example 2
This embodiment provides a building 3D prints shower nozzle extrusion state intelligence control system's application scene, gathers the concrete and prints state data, and adaptation 3D prints the concrete.
Adding mixed concrete with different proportions into a screw pump storage bin 5 to perform trial printing, wherein in the printing process, a viscosity sensor 4 and a pressure sensor 8 collect viscosity data and extrusion pressure data of the concrete in real time and send the data to an intelligent control device to be recorded, and corresponding an actual printing state with the collected extrusion pressure data and viscosity data (the actual printing state refers to a state of printing out a concrete finished product, and the actual printing state evaluation can be performed through finished product appearance quality, a microstructure, mechanical properties or durability tests), so that extrusion pressure parameters and viscosity parameters suitable for 3D printing of the concrete can be obtained and used as the standard of subsequent printing operation. When a sufficient amount of data is collected, the performance of the concrete slurry is preliminarily judged according to the viscosity data of the concrete slurry, and the concrete meeting the printing parameter requirements can be prepared under the condition of not printing on a machine.
Example 3
The embodiment provides an application scene of an intelligent control system for the extrusion state of a 3D printing nozzle of a building, parameterizes the printing state and optimizes the mix proportion of 3D printing concrete. In the continuous in-process of printing, intelligent control device can collect a large amount of print data (including viscosity parameter, extrusion pressure parameter and printing concrete mix proportion), and it is corresponding with real-time print data to print the state in real time, constantly matches the print data under the good print state, and the in-process of follow-up print job, the print parameter of control concrete constantly optimizes the mix proportion that 3D printed the concrete in print data.
Example 3
The embodiment provides an application scene of a building 3D printing nozzle extrusion state intelligent control system, and extrusion speed is intelligently regulated and controlled. 3D printing is carried out on a certain building, excessive concrete is mixed at one time, in the printing process, the intelligent control device displays that the viscosity of slurry is increased, the extrusion pressure is increased, but the extrusion pressure parameter and the viscosity parameter are still in a suitable printing parameter range, the slurry liquid level in the screw pump storage bin 5 is lower than the second liquid level height sensor 3, the extrusion speed is reduced, the intelligent control device identifies a signal of the second liquid level height sensor 3, an instruction is sent to a material conveying system, the material conveying system increases the slurry conveying speed, so that the liquid level in the screw pump storage bin 5 is higher than the second liquid level height sensor 3, the intelligent control device sends the instruction to the material conveying system again, the material conveying system reduces the conveying speed, and the slurry liquid level is stabilized between the first liquid level height sensor 2 and the second liquid level height sensor 3.
Example 4
The embodiment provides an application scene of a building 3D printing nozzle extrusion state intelligent control system, and extrusion speed is intelligently regulated and controlled. In the 3D printing process of the outdoor large-scale component at a certain time, the printing duration is long, the air temperature changes, the intelligent control device displays that the viscosity of slurry is increased, the extrusion pressure is increased, but the extrusion pressure is still within a suitable printing parameter range, the liquid level height in the screw pump storage bin 5 is normal, but the data collected by the electromagnetic flowmeter 7 displays that the printing extrusion speed is reduced to be below v +, the control system sends an instruction to the screw pump 6 to accelerate the rotation speed, and the extrusion speed is increased to be between v + and v-.
Example 5
The embodiment provides an application scenario of an intelligent control system for the extrusion state of a 3D printing nozzle of a building, and the printing operation is stopped for the slurry with abnormal printing state. In the 3D printing process of a certain building, the extrusion pressure data acquired by the pressure sensor 8 shows that the extrusion pressure is too large and exceeds the rated extrusion pressure value by multiple times, although slurry can still be extruded, the printing requirement can not be met by judgment, the intelligent control device sends an instruction to stop all printing works, and the loss of a printer is avoided or unqualified products are printed.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (10)
1. An intelligent control system for the extrusion state of a 3D printing nozzle of a building is characterized by comprising a liquid level sensor, a viscosity sensor, an electromagnetic flowmeter, a pressure sensor and an intelligent control device;
the liquid level sensor is arranged in the screw pump storage bin and is used for monitoring the liquid level in the screw pump storage bin;
the viscosity sensor is arranged in the screw pump storage bin and is used for monitoring the viscosity of the slurry;
the electromagnetic flow meter is arranged between the spray head and the screw pump and is used for monitoring the extrusion speed of the slurry;
the pressure sensor is arranged in the spray head and used for monitoring the pressure of slurry on the spray head during extrusion;
the liquid level sensor, the viscosity sensor, the electromagnetic flowmeter and the pressure sensor are connected with the intelligent control device, and the intelligent control device is connected with the screw pump and the material conveying system.
2. The system of claim 1, wherein the level sensor comprises a first level sensor and a second level sensor, the first level sensor is located above the second level sensor, and the first level sensor and the second level sensor form a level stop.
3. The intelligent control system for the extrusion state of the 3D printing nozzle of the building according to claim 1, further comprising an alarm unit, wherein the alarm unit is connected with the intelligent control device.
4. The intelligent control system for the extrusion state of the 3D printing nozzle of the building according to claim 1, further comprising a display unit, wherein the display unit is connected with the intelligent control device.
5. An intelligent control method for the extrusion state of a 3D printing nozzle of a building, which adopts the intelligent control system for the extrusion state of the 3D printing nozzle of the building according to any one of claims 1 to 4, and is characterized by comprising the following steps:
s1, collecting concrete printing state data and adapting to 3D printing concrete;
s2, monitoring the printing state of the concrete;
and S3, intelligently regulating and controlling the extrusion state of the concrete.
6. The intelligent control method for the extrusion state of the 3D printing nozzle of the building according to claim 5, wherein in the step S1, the mixed concrete with different proportions is added into a screw pump storage bin for trial printing operation, in the printing process, the viscosity sensor and the pressure sensor acquire the viscosity data and the extrusion pressure data of the concrete in real time and send the data to the intelligent control device for recording, and the actual printing state corresponds to the viscosity data and the extrusion pressure data to obtain and record the printing parameters suitable for 3D printing of the concrete.
7. The method according to claim 5, wherein in step S1, during the printing operation, the intelligent control device records the viscosity data and the extrusion pressure data of the concrete in real time and corresponds to the real-time printing state, continuously optimizes and records the printing parameters, and controls the printing parameters of the concrete in the printing data for the subsequent printing operation.
8. The method according to claim 5, wherein in step S2, a rated extrusion pressure range and a rated viscosity range of the concrete are obtained according to the concrete printing state data collected in step S1, and in the printing process, if the extrusion pressure data collected by the pressure sensor exceeds the rated extrusion pressure range or the viscosity data collected by the viscosity sensor exceeds the rated viscosity range, the intelligent control device sends an instruction to stop printing; if the extrusion pressure data collected by the pressure sensor is within the rated extrusion pressure range and the viscosity data collected by the viscosity sensor is within the rated viscosity range, the process proceeds to step S3.
9. The method according to claim 5, wherein in step S3, if the slurry level in the screw pump storage bin is lower than the liquid level sensor, the intelligent control device sends a command to the feeding system, and the feeding system increases the slurry feeding speed; if the slurry level in the screw pump storage bin is higher than the liquid level sensor, the intelligent control device sends an instruction to the material conveying system, and the material conveying system reduces the conveying speed of the slurry.
10. The method according to claim 9, wherein in step S3, if the extrusion speed data collected by the electromagnetic flowmeter is less than the rated extrusion speed, the intelligent control device sends an instruction to increase the rotation speed of the screw pump; if the extrusion speed data collected by the electromagnetic flowmeter is greater than the rated extrusion speed, the intelligent control device sends out an instruction to reduce the rotating speed of the screw pump.
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| CN114102797A (en) * | 2021-12-27 | 2022-03-01 | 中交第一公路勘察设计研究院有限公司 | Quantification device for printing performance of 3D printing building material and using method thereof |
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| CN111636688B (en) | 2021-09-03 |
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