CN111922337A - Control system of magnesium alloy 3D printing device - Google Patents
Control system of magnesium alloy 3D printing device Download PDFInfo
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- CN111922337A CN111922337A CN202010904814.3A CN202010904814A CN111922337A CN 111922337 A CN111922337 A CN 111922337A CN 202010904814 A CN202010904814 A CN 202010904814A CN 111922337 A CN111922337 A CN 111922337A
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- 238000010146 3D printing Methods 0.000 title claims abstract description 37
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000001301 oxygen Substances 0.000 claims abstract description 38
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 38
- 239000000779 smoke Substances 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 abstract description 8
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 37
- 238000007639 printing Methods 0.000 description 25
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 18
- 239000007789 gas Substances 0.000 description 13
- 230000007246 mechanism Effects 0.000 description 10
- 229910052786 argon Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000005273 aeration Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000428 dust Substances 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides a control system of a magnesium alloy 3D printing device, which comprises a controller, wherein the input end of the controller is respectively connected with an oxygen content detector and a pressure detector, the output end of the controller is respectively connected with a relay, an air supplement valve and an exhaust valve, the controller receives signals input by the oxygen content detector and the pressure detector, sends a switching-on or switching-off control signal to the relay, and sends a control signal for increasing or decreasing the opening degree to the air supplement valve and the exhaust valve. By monitoring the oxygen content and the pressure environment in the 3D printer in real time, the system can timely send feedback signals of power failure and pressure regulation, and supports long-time safe operation of the 3D printing device. In addition, the input end of the controller is also connected with an air supply flowmeter, an exhaust flowmeter or a circulating flowmeter for feedback control of the air inlet flow and the air outlet flow of the 3D printer.
Description
Technical Field
The invention relates to the technical field of alloy forming and manufacturing, in particular to a control system of a magnesium alloy 3D printing device.
Background
The magnesium alloy is an alloy formed by adding other elements on the basis of magnesium, has the advantages of small density, high specific strength, large elastic modulus, good heat dissipation and shock absorption performance, and becomes a preferred material for lightweight parts in the fields of aerospace, new energy automobiles, medical implants, consumer electronics and the like. The traditional magnesium alloy parts are manufactured by a casting and machining combined mode, and parts with complex structures or thin wall thicknesses cannot be machined by the mode. The 3D printing technology can overcome the problem, parts with complex structures can be manufactured, and therefore the light weight degree of products is improved. Chinese patent document with publication number CN206702220U discloses a SLM type 3D printer, this 3D printer includes the casing, the pivot has been installed through the installing frame in the casing, be connected with metal powder jar through the pneumatic cylinder in the pivot, it is rotatory to drive metal powder pipe through the pivot rotation, the metal powder pipe left and right sides is equipped with the scraper blade and paves the material, the casing lower part is equipped with the argon gas bin, argon gas bin both sides are equipped with the exhaust tube and are connected with the working chamber, be equipped with the blast pipe on the working chamber, close the blast pipe after the argon gas is full of the working chamber and print. This patent provides a scheme for printing under an argon atmosphere.
However, due to the characteristics of easy combustion and explosion, low density and low melting point of the magnesium alloy, the safety problem in the 3D printing process is prominent, and a large amount of smoke and dust are easily generated. Therefore, the current research results including the patent can only be printed in small batches in a short time under the protection of argon. Even if the printing is performed in a short time and in a small batch, the current research results do not disclose the critical value of starting the printing of the printer, and the critical value can ensure the printing safety. In addition, the applicant also finds that in 3D printing for manufacturing magnesium alloy precision parts, both pressure and oxygen content are related to product quality, and those skilled in the art can easily know that, in order to ensure printing safety in manufacturing large parts or printing for a long time, waste caused by long argon gas introduction time before printing is avoided, product quality and yield are also ensured, parameters such as oxygen content and pressure are not obtained through limited experiments, and therefore those skilled in the art cannot obtain suggestions, how to control the parameters is to satisfy the requirements of printing large parts and printing for a long time, and improve product quality.
Disclosure of Invention
The technical problem solved by the invention is as follows: the magnesium alloy 3D printing control system is provided to support long-time safe operation of a magnesium alloy 3D printing device.
The invention is realized by the following technical scheme.
The invention provides a control system of a magnesium alloy 3D printing device, which comprises a controller, wherein a first input end of the controller is connected with an oxygen content detector, a second input end of the controller is connected with a pressure detector, a first output end of the controller is connected with a relay, a second output end of the controller is connected with an air compensating valve, a third output end of the controller is connected with an exhaust valve, the controller receives detection signals of the oxygen content detector and the pressure detector, sends on-off control signals to the relay, and sends opening control signals to the air compensating valve and the exhaust valve.
The environment in the 3D printer is monitored in real time through the oxygen content detector and the pressure detector, and when the oxygen content in the 3D printer exceeds a set value, the relay is controlled to disconnect a printing power supply in time, so that the printing safety is guaranteed; the air supply valve and the exhaust valve are respectively arranged at an air supply port and an exhaust port of the 3D printer, and when the pressure exceeds a set range, the stability of printing pressure is kept by adjusting air supply flow and exhaust flow.
As an improvement of the invention, the third input end of the controller is also connected with an air supply flowmeter, and the controller also receives a detection signal of the air supply flowmeter, sends an opening control signal to the air supply valve and sends an on-off control signal to the relay. Furthermore, the fourth input end of the controller is also connected with an exhaust flowmeter, the controller also receives a detection signal of the exhaust flowmeter, sends an opening control signal to the exhaust valve and sends an on-off control signal to the relay. Through the setting, the feedback control on the air supply flow and the exhaust flow is realized, and the stability of the air flow in the 3D printer is maintained.
The detection signals of the air supply flowmeter and the exhaust flowmeter are introduced into the on-off control of the relay, when the oxygen content is higher than a set value, the air supply flow is zero, and the exhaust flow is zero, when any one of the oxygen content, the air supply flow and the exhaust flow occurs, the controller sends a disconnected control signal to the relay, the 3D printing power supply is disconnected, and the printing safety is guaranteed.
The controller controls the opening degree of the air replenishing valve according to the detection signal of the air replenishing flowmeter and controls the opening degree of the exhaust valve according to the detection signal of the exhaust flowmeter, and the priority of the two controls is higher than that of the air replenishing valve and the exhaust valve according to the detection signal of the pressure detector. Make tonifying qi flow, exhaust flow be in setting for the scope all the time, prevent to react excessively in the pressure adjustment mechanism, cause the stop of protective gas replacement process in the 3D printer.
As another improvement of the invention, the fifth input end of the controller is also connected with a circulation flow meter, and the fourth output end is also connected with a circulation flow valve. The controller also receives the detection signal of the circulating flowmeter, sends an opening control signal to the circulating flow valve and sends an on-off control signal to the relay. The improvement is used for the occasion of pumping, purifying, recycling and supplementing the protective gas in the 3D printer, realizes feedback control on the circulation flow through the circulation flow meter and the circulation flow valve, and maintains stable airflow in the 3D printer.
In the improved scheme, the controller sends opening and closing control signals to the air supply valve and the exhaust valve according to detection signals of the oxygen content detector, and the priority of the controller is higher than that of the controller which sends opening and closing control signals to the air supply valve and the exhaust valve according to the detection signals of the pressure detector. When the oxygen content in the 3D printer exceeds a set value, protective gas in the 3D printer can be replaced preferentially, and the argon protective environment is achieved quickly.
Further, the circulation flow meter is installed on a circulation feeding pipe of the 3D printer. Ensuring accurate control of the clean argon supplement amount.
Further, a circulation flow valve is installed on a circulation extraction pipe of the 3D printer. The control reaction is fast.
Furthermore, a sixth input end of the controller is further connected with a smoke detector, and the controller sends an on-off control signal to the relay according to a detection signal of the smoke detector. The working state of the circulating unit is judged through the detection signal of the smoke detector, and the 3D printing power supply is timely turned off when the circulating unit works abnormally, so that the printing safety is guaranteed.
This further development has the following features: detection signals of a circulating flow meter and a smoke dust detector are introduced into on-off control of the relay, when any one of the oxygen content, the circulating flow rate and the smoke dust content is higher than a set value, the controller sends an off control signal to the relay to turn off the 3D printing power supply, and printing safety is guaranteed.
As a general arrangement for each modification, the oxygen content detector and the pressure detector are installed in a working cavity of the 3D printer. The oxygen content and pressure in the 3D printer are accurately detected.
Further, a relay is installed at a laser power source of the 3D printer. The starting and stopping of printing are controlled by controlling the on-off of the laser power supply, the reaction is rapid, and unnecessary restarting of the 3D printer is avoided.
Further, the controller is an STM32 series single-chip microcomputer.
The invention has the beneficial effects that:
in conclusion, by using the method and the device, the oxygen content and the pressure environment in the 3D printer can be monitored in real time, and the feedback signals of power on/off and pressure regulation can be sent out in time, so that the argon protection environment in the 3D printing process can be continuously controlled, and the long-time safe operation of the magnesium alloy 3D printing device can be supported. In addition, the air supply flow, the exhaust flow and the circulation flow of the 3D printer can be subjected to feedback control, and the stability of the air flow in the 3D printer is maintained; the printing process parameters such as gas flow, pressure and the like can be set, and the control range is wide.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a magnesium alloy 3D printing apparatus applied in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a magnesium alloy 3D printing apparatus applied in the second embodiment of the present invention.
In the figure: 1-a controller; 2-an oxygen content detector; 3-a pressure detector; 4-air supplement valve; 5-an exhaust valve; 6-air supply flow meter; 7-an exhaust gas flow meter; 8-a circulation flow meter; 9-a circulation flow valve; 10-a relay; 11-a smoke detector; 20-3D printer; 21-qi invigorating unit; 22-air supplement pipe; 23-an exhaust unit; 24-an exhaust pipe; 25-a circulation unit; 26-circulating a draw-off pipe; 27-circular feeding tube.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The first embodiment is as follows: as shown in fig. 1.
The invention provides a control system of a magnesium alloy 3D printing device, which comprises a controller 1, wherein a first input end of the controller 1 is connected with an oxygen content detector 2, a second input end of the controller 1 is connected with a pressure detector 3, a first output end of the controller is connected with a relay 10, a second output end of the controller is connected with an air compensating valve 4, a third output end of the controller is connected with an exhaust valve 5, the controller 1 receives detection signals of the oxygen content detector 2 and the pressure detector 3, sends on-off control signals to the relay 10, and sends opening control signals to the air compensating valve 4 and the exhaust valve 5.
The environment in the 3D printer 20 is monitored in real time through the oxygen content detector 2 and the pressure detector 3, and when the oxygen content in the 3D printer exceeds a set value, the relay 10 is controlled to disconnect a printing power supply in time, so that the printing safety is guaranteed; the air supply valve 4 and the exhaust valve 5 are respectively arranged on an air supply pipe 21 and an exhaust pipe 22 of the 3D printer 20, and when the pressure exceeds a set range, the printing pressure is kept stable by adjusting the air supply flow and the exhaust flow.
Further, a third input end of the controller 1 is further connected with an air supply flowmeter 6, and the controller 1 further receives a detection signal of the air supply flowmeter 6, sends an opening control signal to the air supply valve 4, and sends an on-off control signal to the relay 10. Further, the fourth input end of the controller 1 is further connected with an exhaust flowmeter 7, and the controller 1 further receives a detection signal of the exhaust flowmeter 7, sends an opening control signal to the exhaust valve 5, and sends an on-off control signal to the relay 10. Through this setting, realized carrying out feedback control to tonifying qi flow, exhaust flow, maintained the air current in the 3D printer 20 stable.
When the apparatus is installed, the make-up air flow meter 6 is installed on the make-up air pipe 22 of the 3D printer 20, and the exhaust air flow meter 7 is installed on the exhaust air pipe 24 of the 3D printer 20.
Detection signals of the air supply flowmeter 4 and the exhaust flowmeter 7 are introduced into on-off control of the relay 10, when an oxygen content signal received by the controller 1 is higher than a set value, the flow of an air supply flow signal is zero, and the flow of an exhaust flow signal is zero, and when any one or more of the signals occur, the controller 1 sends a disconnected control signal to the relay 10 to disconnect a 3D printing power supply, so that the printing safety is guaranteed; when none of the 3 items occurs, it indicates that the 3D printer 20 is in a state of continuously supplying and exhausting air and the oxygen content is lower than the set value, and the controller 1 sends a power-on control signal to the relay 10.
The detection signal of the air make-up flow meter 6 is introduced into the opening control of the air make-up valve 4, the controller 1 controls the opening of the air make-up valve 4 according to the detection signal of the air make-up flow meter 6, and the priority is prior to the priority for controlling the opening of the air make-up valve 4 according to the detection signal of the pressure detector 3. The flow control mechanism for air supply: the controller 1 receives a detection signal of the air supply flowmeter 6, and when the air supply flow is lower than a set range, the controller 1 sends a control signal for increasing the opening degree to the air supply valve 4; when the air supplement flow is higher than the set range, the controller 1 sends a control signal for reducing the opening degree to the air supplement valve 4. When the air supply flow is in a set range, entering a pressure-air supply control mechanism: the controller 1 controls the opening of the aeration valve 4 according to the detection signal of the pressure detector 3, when the pressure in the 3D printer 20 is larger than a set range, the controller 1 sends a control signal for reducing the opening to the aeration valve 4, and when the pressure in the 3D printer 20 is smaller than the set range, the controller 1 sends a control signal for increasing the opening to the aeration valve 4; in the process, the controller 1 still receives the detection signal of the make-up air flow meter 6, and returns to the make-up air flow control mechanism if the make-up air flow is higher or lower than the set range.
The opening degree of the exhaust valve 5 is controlled by introducing a detection signal of the exhaust flowmeter 7 into the opening degree control of the exhaust valve 5, and controlling the opening degree of the exhaust valve 5 based on the detection signal of the exhaust flowmeter 7 is prioritized over controlling the opening degree of the exhaust valve 5 based on the detection signal of the pressure detector 7. An exhaust flow control mechanism: the controller 1 receives a detection signal of the exhaust flowmeter 7, and when the exhaust flow is lower than a set range, the controller 1 sends a control signal for increasing the opening degree to the exhaust valve 5; when the exhaust flow rate is higher than the set range, the controller 1 sends a control signal to reduce the opening degree to the exhaust valve 5. When the exhaust flow is in a set range, entering a pressure-exhaust control mechanism: the controller 1 controls the opening degree of the exhaust valve 5 according to the detection signal of the pressure detector 3, the controller 1 sends a control signal for reducing the opening degree to the exhaust valve 5 when the pressure in the 3D printer 20 is smaller than a set range, and the controller 1 sends a control signal for increasing the opening degree to the exhaust valve 5 when the pressure in the 3D printer 20 is larger than the set range; in the process, the controller 1 still receives the detection signal of the gas make-up flowmeter 6, and returns to the exhaust flow control mechanism if the exhaust flow is higher or lower than the set range.
Through the arrangement, the air supply flow and the exhaust flow are always in the set range, and the phenomenon that the replacement process of the protective gas in the 3D printer is stopped due to excessive reaction in a pressure adjusting mechanism is prevented.
Fig. 3 is a schematic view of a magnesium alloy 3D printing apparatus according to an embodiment: this magnesium alloy 3D printing device, including 3D printer 20, 3D printer 20 connects tonifying qi unit 21 through tonifying qi pipe 22, and 3D printer 20 connects exhaust unit 23 through blast pipe 24. In addition, the present embodiment can be mounted on a general SLM type 3D printer 20 to increase its continuous printing time.
Example two: as shown in fig. 2.
The invention provides a control system of a magnesium alloy 3D printing device, which comprises a controller 1, wherein a first input end of the controller 1 is connected with an oxygen content detector 2, a second input end of the controller 1 is connected with a pressure detector 3, a first output end of the controller is connected with a relay 10, a second output end of the controller is connected with an air compensating valve 4, a third output end of the controller is connected with an exhaust valve 5, the controller 1 receives detection signals of the oxygen content detector 2 and the pressure detector 3, sends on-off control signals to the relay 10, and sends opening control signals to the air compensating valve 4 and the exhaust valve 5.
The fifth input end of the controller 1 is also connected with a circulation flow meter 8, and the fourth output end is also connected with a circulation flow valve 9. The controller 1 also receives the detection signal of the circulating flowmeter 8, sends an opening degree control signal to the circulating flow valve 9 and sends an on-off control signal to the relay 10. When the improvement is used for extracting, purifying and recycling the shielding gas in the 3D printer 20, the feedback control of the circulation flow is realized through the circulation flow meter 8 and the circulation flow valve 9, and the stability of the airflow in the 3D printer 20 is maintained.
In this modification, the controller 1 transmits the opening/closing control signals to the aeration valve 4 and the exhaust valve 5 based on the detection signal of the oxygen content detector 2, and the priority thereof is higher than the priority of the transmission of the opening/closing control signals to the aeration valve 4 and the exhaust valve 5 based on the detection signal of the pressure detector 3. An oxygen content control mechanism: the controller 1 receives a detection signal of the oxygen content detector 2, and when the oxygen content is greater than a set value, the controller 1 simultaneously sends opening control signals to the air supply valve 4 and the exhaust valve 5; when the oxygen content is not more than the set value, entering a pressure control mechanism: when the pressure in the 3D printer 20 is smaller than a set range, the controller 1 sends an opening control signal to the air compensating valve 4 and sends a closing control signal to the exhaust valve 5; when the pressure in the 3D printer 20 is larger than a set range, the controller 1 sends a closing control signal to the air compensating valve 4 and sends an opening control signal to the exhaust valve 5; and when the pressure in the 3D printer is in a set range, the air supply valve 4 and the exhaust valve 5 are both closed.
Further, the circulation flow meter 8 is installed on the circulation makeup pipe 22 of the 3D printer 20. Ensuring accurate control of the clean argon supplement amount.
Further, the circulation flow valve 9 is installed on the circulation suction pipe 24 of the 3D printer 20. The control reaction is fast.
Further, a smoke detector 11 is further connected to a sixth input end of the controller 1, and the controller 1 further sends an on-off control signal to the relay 10 according to a detection signal of the smoke detector 11. The working state of the circulating unit 25 is judged through the detection signal of the smoke detector 11, and the 3D printing power supply is timely turned off when the circulating unit 25 works abnormally, so that the printing safety is guaranteed. The smoke detector 11 is installed on the circulation supply pipe 27 of the 3D printer 20.
The present embodiment also has the following features: detection signals of a circulating flow meter 8 and a smoke dust detector 11 are introduced into on-off control of the relay 10, when any one or more of the oxygen content, the circulating flow rate and the smoke dust content are higher than a set value, the controller 1 sends an off control signal to the relay 10 to turn off the 3D printing power supply, and printing safety is guaranteed. When none of the 3D printers occurs, it indicates that the 3D printer 20 is in continuous circulation, and the circulation unit 25 is in a normal gas purification state, and the oxygen content is lower than a set value, the controller 1 sends a power-on control signal to the relay 10.
Fig. 4 is a schematic view of a magnesium alloy 3D printing apparatus applied in the second embodiment: this magnesium alloy 3D printing device, including 3D printer 20, 3D printer 20 connects tonifying qi unit 21 through tonifying qi pipe 22, and 3D printer 20 connects exhaust unit 23 through blast pipe 24, and 3D printer 20 is through circulation extraction pipe 26 and circulation income pipe 27 connection circulation unit 25.
The programming of the controller 1 can be implemented by a person skilled in the art by programming through the description of the logical relationship in the embodiment. The controller 1 adopts STM32 series single-chip microcomputer. In the above embodiments, the PA ports are used as the first input terminal, the second input terminal, the third input terminal, the fourth input terminal, the fifth input terminal, and the sixth input terminal, and the PE ports are used as the first output terminal, the second output terminal, the third output terminal, and the fourth output terminal.
Finally, when the invention is used, the oxygen content detector 2 and the pressure detector 3 are arranged in the working cavity of the 3D printer 20, so that the oxygen content and the pressure in the 3D printer 20 can be accurately detected; the 3D printer 20 is an SLM type 3D printer, the relay 10 is installed at a laser power supply of the 3D printer 20, starting and stopping of printing are controlled by controlling on and off of the laser power supply, the response is rapid, and unnecessary restarting of the 3D printer 20 is avoided; the aeration valve 4 and the exhaust valve 5 are respectively installed on an aeration pipe 22 and an exhaust pipe 24 of the 3D printer 20.
Claims (10)
1. The utility model provides a magnesium alloy 3D printing device control system which characterized in that: the oxygen content measuring device comprises a controller (1), wherein a first input end of the controller (1) is connected with an oxygen content detector (2), a second input end of the controller is connected with a pressure detector (3), a first output end of the controller is connected with a relay (10), a second output end of the controller is connected with an air compensating valve (4), and a third output end of the controller is connected with an exhaust valve (5).
2. The magnesium alloy 3D printing device control system according to claim 1, wherein: the controller (1) is also provided with a third input end, and the third input end is connected with an air supply flowmeter (6).
3. The magnesium alloy 3D printing device control system according to claim 2, wherein: the controller (1) is also provided with a fourth input end, and the fourth input end is connected with an exhaust flowmeter (7).
4. The magnesium alloy 3D printing device control system according to claim 1, wherein: the controller (1) is also provided with a fifth input end and a fourth output end, the fifth input end is connected with a circulating flow meter (8), and the fourth output end is connected with a circulating flow valve (9).
5. The magnesium alloy 3D printing device control system according to claim 4, wherein: the circulation flow meter (8) is installed on a circulation feeding pipe (27) of the 3D printer (20).
6. The magnesium alloy 3D printing device control system according to claim 4, wherein: the circulating flow valve (9) is installed on a circulating extraction pipe (26) of the 3D printer (20).
7. The magnesium alloy 3D printing device control system according to claim 1, wherein: the controller (1) is also provided with a sixth input end, and the sixth input end is connected with a smoke detector (11).
8. The magnesium alloy 3D printing device control system according to claim 1, wherein: the oxygen content detector (2) and the pressure detector (3) are arranged in a working cavity of the 3D printer (20).
9. The magnesium alloy 3D printing device control system according to claim 1, wherein: the relay (10) is installed at a laser power source of the 3D printer (20).
10. The magnesium alloy 3D printing device control system according to claim 1, wherein: the controller (1) is an STM32 series single chip microcomputer.
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| CN113369638A (en) * | 2021-06-11 | 2021-09-10 | 西安理工大学 | Magnesium alloy electric arc additive protection device and use method |
| CN114393217A (en) * | 2022-01-19 | 2022-04-26 | 南京铖联激光科技有限公司 | 3D printing air source detection device and method |
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