Micro sand blasting generator, control circuit, control method and experimental method

Abstract

The invention relates to a trace sand blasting generator, a control circuit, a control method and an experimental method. The trace sand blasting generator is composed of a sand blasting tank, a sand blasting tank cover buckled on the sand blasting tank, an exhaust pipe arranged in the sand blasting tank in parallel along the axis and communicated with an exhaust port, a pressurizing pipe communicated with an air inlet and a sand outlet valve, an exhaust valve connected with the exhaust port through a hose, a gas-sand mixing channel communicated with the air inlet, and a sand discharging port connected with the sand outlet valve. The sand outlet is connected with the sand blasting tank through a sand discharging opening, the vibrator is arranged on the outer wall of the sand blasting tank, and the weight sensor is arranged at the bottom of the sand blasting tank and used for detecting the weight of the sand blasting tank in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of sandblasting and shot blasting, and particularly relates to a micro-sandblasting generator, a control circuit, a control method and an experimental method. Background Art

[0002] For small and fine workpieces, a smaller spray gun is needed. Traditional sandblasting equipment cannot meet the requirements, so micro sandblasting equipment came into being. High-grit abrasives have poor fluidity and are easily affected by static electricity. Using traditional sandblasting methods, the sand flow is unstable, which seriously affects the processing. High-grit abrasives do not sand smoothly and run unstable, making it difficult to meet the requirements of micro sandblasting. Summary of the invention

[0003] The purpose of the present invention is to provide a micro-sandblasting generator, a control circuit, a control method and an experimental method which can realize smooth sanding of high-mesh abrasives, stable operation and meet the requirements of micro-sandblasting processing.

[0004] The technical solution of the present invention is the micro-sandblasting generator, which is special in that it consists of a sandblasting pot, a sandblasting pot cover buckled on the sandblasting pot, an exhaust pipe arranged in parallel along the axis inside the sandblasting pot and connected to the exhaust port, a pressurizing pipe respectively connected to the air inlet and the sand outlet valve, an exhaust valve connected to the exhaust port through a hose, an air-sand mixing channel connected to the air inlet, a lower sand port connected to the sand outlet valve, a sand outlet connected to the sandblasting pot through the lower sand port, a vibrator arranged on the outer wall of the sandblasting pot, a weight sensor arranged at the bottom of the sandblasting pot and used to detect the weight of the sandblasting pot in real time, and a control circuit.

[0005] Preferably, the abrasive in the sandblasting pot is mixed with compressed air through the lower sand outlet and then flows out through the sand flow channel and the sand outlet.

[0006] Preferably, the diameter of the joint between the air inlet and the pressurizing pipe gradually narrows. When the diameter of the pressurizing pipe becomes smaller, the pulse air pressure at the air inlet enters a trough, and the pressurizing pipe starts to relieve pressure on the sandblasting pot, and then the air-sand mixing channel also starts to relieve pressure. Since the diameter of the pressurizing pipe becomes smaller due to narrowing, the pressure relief speed is slow, causing the internal pressure of the sandblasting pot to be instantly much higher than the pressure of the air-sand mixing channel, and the abrasive increases the flow rate and flows from the sand flow channel into the air-sand mixing channel.

[0007] Preferably, the sandblasting pot cover has a built-in desiccant; and the sand adding port obliquely penetrates through the pot wall of the sandblasting pot.

[0008] Preferably, the control circuit comprises an isolation circuit and an MCU connected sequentially via an input interface controlled by a start-stop signal, the weight sensor is connected to the MCU via a conversion circuit, the MCU is electrically connected to a sand outlet valve and / or an exhaust valve via an isolation drive amplifier circuit, and an external power supply supplies power to the MCU via a DC-DC power supply circuit.

[0009] Another technical solution of the present invention is the control circuit of the micro-sandblasting generator, which is special in that it includes an isolation circuit and an MCU sequentially connected to an input interface controlled by a start-stop signal, a weight sensor is connected to the MCU through a conversion circuit, the MCU is electrically connected to a sand outlet valve and / or an exhaust valve through an isolation drive amplifier circuit, and an external power supply supplies power to the MCU through a DC-DC power supply circuit.

[0010] Another technical solution of the present invention is a control method of the micro-sandblasting generator, which is special in that it includes the following steps:

[0011] ⑴Power on the system;

[0012] (2) Exhaust valve is open;

[0013] ⑶The sand outlet valve is closed;

[0014] (4) Determine whether the external start / stop signal is activated. If not, return to step (3); if yes, proceed to the next step;

[0015] ⑸ After stopping sandblasting, the exhaust valve is closed; the compressed air inside the sandblasting tank is transported to the exhaust port through the exhaust pipe and then discharged through the exhaust valve;

[0016] (6) The air inlet is used to take in compressed air;

[0017] ⑺ Pressurize the sandblasting tank; a part of the compressed air enters the pressurizing pipe and the sandblasting tank in sequence to pressurize the sandblasting tank;

[0018] ⑻ When the sand outlet valve is opened, the other part of the compressed air mixes with the compressed air in the sand blasting tank through the lower sand outlet and is ejected through the air-sand mixing channel and the sand outlet along with the abrasive;

[0019] ⑼The vibrator is turned on;

[0020] ⑽During the sandblasting process, the vibrator starts to vibrate to ensure that the abrasive in the sandblasting tank flows out steadily from the lower sand port;

[0021] ⑾ Determine whether the external start / stop signal is turned off? If not, return to step ⑽; if yes, proceed to the next step;

[0022] ⑿Continue with step ⑼, wherein the other path includes: a weight sensor collects the amount of sand in real time;

[0023] ⒀ Determine whether the sand volume is lower than the set standard? If not, return to step ⑿; if yes, proceed to the next step;

[0024] ⒁ The weight of the sandblasting tank is detected in real time through the weight sensor, and an alarm is sounded when the amount of sand is low;

[0025] ⒂The sand outlet valve is closed;

[0026] ⒃The air inlet is cut off;

[0027] ⒄The exhaust valve is open;

[0028] ⒅End.

[0029] The fourth technical solution of the present invention is the experimental method of the micro-sandblasting generator, which is special in that it includes the following steps:

[0030] ⑴ Experimental environment:

[0031] a) Nozzle: 1.5mm; Abrasive: Ceramic Shot B205; Air Pressure: 0.4mPa;

[0032] b) A small cyclone separator to separate the abrasive sprayed from the nozzle for weighing;

[0033] c) A precision electronic scale, accurate to 10 mg;

[0034] ⑵Experimental process:

[0035] a) The inner diameters of the pressure pipes are designed to be φ0.5mm, φ1.5mm, φ3mm, and φ5mm respectively;

[0036] b) The abrasive ejected from the nozzle is separated by a small cyclone separator and the gas is discharged;

[0037] c) The airflow regulating valve is weighed three times for each change in pipe diameter, with each sampling time of 60 seconds;

[0038] d) Calculate the flow rate and analyze the change relationship;

[0039] ⑶Experimental data:

[0040] Flow regulation experiment data record table

[0041] Experimenter: Experiment time: 20240725

[0042]

[0043] Flow data adjustment is achieved by changing the inner diameter of the "pressurized tube"

[0044] ⑷Result analysis:

[0045] When the other conditions (air pressure, nozzle, abrasive, and experimental environment) remain unchanged, the maximum flow rate of 4.95 g / s can be achieved by changing the inner diameter of the "pressurized tube", and the maximum flow rate of 3.71 g / s can be achieved by changing the opening of the airflow regulating valve, indicating that a larger flow regulation can be obtained by changing the inner diameter of the "pressurized tube".

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) The present invention realizes micro-sandblasting, the oscillator prevents abrasive from agglomerating, and a desiccant device is built in the sandblasting tank cover above the sandblasting tank, which can absorb the moisture of the temporarily stored abrasive, further effectively preventing the abrasive from agglomerating; the entire tank body is made of all-metal material and is machined by a machining center, the inner wall is smoother and no paint is sprayed, further ensuring that the abrasive is clean and effectively reducing the friction of the sand flow. Combining the above reasons, the abrasive can be ensured to flow out stably;

[0048] (2) As shown in the flow rate regulation experimental results, the sand flow rate can be adjusted in a wider range;

[0049] ⑶ The present invention installs a weighing sensor to detect the weight of the abrasive in real time, reminding manual replenishment of the abrasive in time, thereby improving the yield rate of the sprayed workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the three-dimensional structure of the micro-sandblasting generator of the present invention;

[0051] Figure 2 It is a top view of the structure of the micro-sandblasting generator of the present invention;

[0052] Figure 3 yes Figure 2 AA section view;

[0053] Figure 4 yes Figure 2 BB section view;

[0054] Figure 5 It is a schematic diagram of the cross-sectional structure of the micro-sandblasting pressure tank of the present invention;

[0055] Figure 6 It is a circuit block diagram of the micro-sandblasting generator of the present invention;

[0056] Figure 7 It is a control flow chart of the micro-sandblasting generator of the present invention;

[0057] Figure 8 It is a flow regulation experiment data record table of the present invention.

[0058] Main component symbols:

[0059] Sandblasting tank cover1 Sandblasting pot 2 Exhaust pipe 3 Pressurized pipe 4 Exhaust port 5 Sand outlet 6 Exhaust valve 7 Vibrator 8 Sand valve 9 Sand opening 10 Air Inlet 11 Weight sensor 12 Sand flow channel 13 Gas-sand mixing channel 14 Gaza 15 DETAILED DESCRIPTION

[0060] The present invention will be further described below in conjunction with the accompanying drawings:

[0061] See also Figure 1 , Figure 2As shown, it consists of a sandblasting pot 2, a sandblasting pot cover 1 buckled on the sandblasting pot 2, an exhaust pipe 3 arranged in parallel along the axis in the sandblasting pot 2 and communicating with the exhaust port 5, a pressurizing pipe 4 respectively communicating with the air inlet 11 and the sand outlet valve 9, an exhaust valve 7 connected to the exhaust port 5 through a hose, an air-sand mixing channel 14 communicated with the air inlet 11, a lower sand port 10 connected to the sand outlet valve 9, a sand outlet 9 connected to the sandblasting pot 2 through the lower sand port 10, a vibrator 8 provided on the outer wall of the sandblasting pot 2, a weight sensor 12 arranged at the bottom of the sandblasting pot 2 and used for real-time detection of the weight of the sandblasting pot, and a control circuit.

[0062] See also Figure 3 As shown, the abrasive in the sandblasting pot 2 is mixed with compressed air through the lower sand outlet 10 and then flows out through the sand outlet 8 of the sand flow channel 13 .

[0063] The diameter of the joint between the air inlet and the pressurizing pipe 4 gradually narrows. When the diameter of the pressurizing pipe 4 becomes smaller, the pulse air pressure of the air inlet 11 enters the trough, and the pressurizing pipe 4 begins to relieve pressure on the sandblasting pot 2, and the air-sand mixing channel 14 also begins to relieve pressure. Since the diameter of the pressurizing pipe 4 is small and the pressure relief speed is slow, the internal pressure of the sandblasting pot will be instantly much higher than the pressure of the air-sand mixing channel 14, and the abrasive will flow from the sand flow channel 13 into the air-sand mixing channel 14, thereby increasing the flow rate. Conversely, when the diameter of the pressurizing pipe 4 becomes larger, the pressure relief speed is fast, the outflow of abrasive from the sand flow channel 13 becomes smaller, and the flow rate decreases.

[0064] The abrasive in the sandblasting pot 2 is mixed with compressed air through the lower sand outlet 10 and then flows out through the sand outlet 8 of the sand flow channel 13 .

[0065] The sandblasting pot cover 1 has a built-in desiccant; and the sand adding port 15 obliquely penetrates through the pot wall of the sandblasting pot 2 .

[0066] See also Figure 3 As shown, the control circuit includes an isolation circuit and an MCU connected in sequence by an input interface controlled by a start-stop signal, the weight sensor is connected to the MCU through a conversion circuit, the MCU is electrically connected to a sand outlet valve and / or an exhaust valve through an isolation drive amplifier circuit, and an external power supply supplies power to the MCU through a DC-DC power supply circuit.

[0067] See also Figure 4 As shown, the control circuit of the micro-sandblasting generator includes an isolation circuit electrically connected to the MCU through an input interface, a weight sensor is connected to the MCU through a conversion circuit, the MCU is electrically connected to the sand outlet valve and / or the exhaust valve through an isolation drive amplifier circuit, and an external power supply supplies power to the MCU through a DC-DC power supply circuit.

[0068] See also Figure 5 As shown, the control method of the micro-sandblasting generator includes the following steps:

[0069] ⑴Power on the system;

[0070] (2) Exhaust valve is open;

[0071] ⑶The sand outlet valve is closed;

[0072] (4) Determine whether the external start / stop signal is activated. If not, return to step (3); if yes, proceed to the next step;

[0073] ⑸ After stopping sandblasting, the exhaust valve is closed; the compressed air inside the sandblasting tank is transported to the exhaust port through the exhaust pipe and then discharged through the exhaust valve;

[0074] (6) The air inlet is used to take in compressed air;

[0075] ⑺ Pressurize the sandblasting tank; a part of the compressed air enters the pressurizing pipe and the sandblasting tank in sequence to pressurize the sandblasting tank;

[0076] ⑻ When the sand outlet valve is opened, the other part of the compressed air mixes with the compressed air in the sand blasting tank through the lower sand outlet and is ejected through the air-sand mixing channel and the sand outlet along with the abrasive;

[0077] ⑼The vibrator is turned on;

[0078] ⑽During the sandblasting process, the vibrator starts to vibrate to ensure that the abrasive in the sandblasting tank flows out steadily from the lower sand port;

[0079] ⑾ Determine whether the external start / stop signal is turned off? If not, return to step ⑽; if yes, proceed to the next step;

[0080] ⑿Continue with step ⑼, wherein the other path includes: a weight sensor collects the amount of sand in real time;

[0081] ⒀ Determine whether the sand volume is lower than the set standard? If not, return to step ⑿; if yes, proceed to the next step;

[0082] ⒁ The weight of the sandblasting tank is detected in real time through the weight sensor, and an alarm is sounded when the amount of sand is low;

[0083] ⒂The sand outlet valve is closed;

[0084] ⒃The air inlet is cut off;

[0085] ⒄The exhaust valve is open;

[0086] ⒅End.

[0087] The experimental method of the micro-sandblasting generator includes the following steps:

[0088] ⑴ Experimental environment:

[0089] a) Nozzle: 1.5mm; Abrasive: Ceramic Shot B205; Air Pressure: 0.4mPa;

[0090] b) A small cyclone separator to separate the abrasive sprayed from the nozzle for weighing;

[0091] c) A precision electronic scale, accurate to 10 mg;

[0092] ⑵Experimental process:

[0093] a) The inner diameters of the pressure pipes are designed to be φ0.5mm, φ1.5mm, φ3mm, and φ5mm respectively;

[0094] b) The abrasive ejected from the nozzle is separated by a small cyclone separator and the gas is discharged;

[0095] c) The airflow regulating valve is weighed three times for each change in pipe diameter, with each sampling time of 60 seconds;

[0096] d) Calculate the flow rate and analyze the change relationship;

[0097] ⑶ Experimental data

[0098] Flow regulation experiment data record table

[0099] Experimenter: Experiment time: 20240725

[0100]

[0101] Flow data adjustment is achieved by changing the inner diameter of the "pressurized tube"

[0102] ⑷Result analysis:

[0103] See also Figure 3 As shown, when the other conditions: air pressure, nozzle, abrasive, and experimental environment remain unchanged, the maximum flow rate of 4.95 g / s can be achieved by changing the inner diameter of the "pressurized tube", and the maximum flow rate of 3.71 g / s can be achieved by changing the opening of the airflow regulating valve, indicating that a larger flow regulation can be obtained by changing the inner diameter of the "pressurized tube".

[0104] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A micro-sandblasting generator, characterized in that: The utility model comprises a sandblasting pot, a sandblasting pot cover buckled on the sandblasting pot, an exhaust pipe arranged in parallel along the axis in the sandblasting pot and communicating with the exhaust port, a pressurizing pipe communicating with the air inlet and the sand outlet valve respectively, an exhaust valve connected with the exhaust port through a hose, an air-sand mixing channel communicated with the air inlet, a lower sand outlet connected with the sand outlet valve, a sand outlet connected with the sandblasting pot through the lower sand outlet, a vibrator arranged on the outer wall of the sandblasting pot, a weight sensor arranged at the bottom of the sandblasting pot and used for real-time detection of the weight of the sandblasting pot, and a control circuit.

2. The micro-sandblasting generator according to claim 1, characterized in that: The abrasive in the sandblasting pot is mixed with compressed air through the lower sand outlet and then flows out through the sand flow channel and the sand outlet.

3. The micro-sandblasting generator according to claim 1, characterized in that: The diameter of the joint between the air inlet and the pressurizing pipe gradually narrows. When the diameter of the pressurizing pipe becomes smaller, the pulse air pressure at the air inlet enters the trough, and the pressurizing pipe begins to relieve pressure on the sandblasting pot, and then the air-sand mixing channel also begins to relieve pressure. Since the diameter of the pressurizing pipe becomes smaller due to narrowing, the pressure relief speed is slow, causing the internal pressure of the sandblasting pot to be instantly much higher than the pressure of the air-sand mixing channel, and the abrasive increases the flow rate from the sand flow channel into the air-sand mixing channel.

4. The micro-sandblasting generator according to claim 1, characterized in that: The sandblasting pot cover has a built-in desiccant; and the sand adding port obliquely penetrates through the pot wall of the sandblasting pot.

5. The micro-sandblasting generator according to claim 1, characterized in that: The control circuit includes an isolation circuit and an MCU connected in sequence by an input interface controlled by a start-stop signal, a weight sensor is connected to the MCU through a conversion circuit, the MCU is electrically connected to a sand outlet valve and / or an exhaust valve through an isolation drive amplifier circuit, and an external power supply supplies power to the MCU through a DC-DC power supply circuit.

6. A control circuit for a micro-sandblasting generator, characterized in that: The invention comprises an isolation circuit and an MCU which are sequentially connected by an input interface controlled by a start-stop signal, a weight sensor is connected to the MCU through a conversion circuit, the MCU is electrically connected to a sand outlet valve and / or an exhaust valve through an isolation drive amplifier circuit, and an external power supply supplies power to the MCU through a DC-DC power supply circuit.

7. A control method for a micro-sandblasting generator, characterized in that: The following steps are involved: ⑴Power on the system; (2) Exhaust valve is open; ⑶The sand outlet valve is closed; (4) Determine whether the external start / stop signal is activated, if not, return to step (3); If yes, proceed to the next step; ⑸ After stopping sandblasting, the exhaust valve is closed; the compressed air inside the sandblasting tank is transported to the exhaust port through the exhaust pipe and then discharged through the exhaust valve; (6) The air inlet is used to take in compressed air; ⑺ Pressurize the sandblasting tank; a part of the compressed air enters the pressurizing pipe and the sandblasting tank in sequence to pressurize the sandblasting tank; ⑻ When the sand outlet valve is opened, the abrasive in the sandblasting tank is mixed with the compressed air through the lower sand outlet and sprayed out through the air-sand mixing channel and the sand outlet along with the abrasive; ⑼The vibrator is turned on; ⑽During the sandblasting process, the vibrator starts to vibrate to ensure that the abrasive in the sandblasting tank flows out steadily from the lower sand port; ⑾ Determine whether the external start / stop signal is turned off? If not, return to step ⑽; If yes, proceed to the next step; ⑿Continue with step ⑼, wherein the other path includes: a weight sensor collects the amount of sand in real time; ⒀ Determine whether the sand volume is lower than the set standard? If not, return to step ⑿; if yes, proceed to the next step; ⒁ The weight of the sandblasting tank is detected in real time through the weight sensor, and an alarm is sounded when the sand level is low; ⒂The sand outlet valve is closed; ⒃The air inlet is cut off; ⒄The exhaust valve is open; ⒅End.

8. An experimental method for a micro-sandblasting generator, characterized in that: The following steps are involved: ⑴ Experimental environment: a) Nozzle: 1.5mm; Abrasive: Ceramic Shot B205; Air pressure: 0.4mPa; b) A small cyclone separator to separate the abrasive sprayed from the nozzle for weighing; c) A precision electronic scale, accurate to 10 mg; ⑵Experimental process: a) The inner diameters of the pressure pipes are designed to be φ0.5mm, φ1.5mm, φ3mm, and φ5mm respectively; b) The abrasive ejected from the nozzle is separated by a small cyclone separator and the gas is discharged; c) The airflow regulating valve is weighed three times for each change in pipe diameter, with each sampling time of 60 seconds; d) Calculate the flow rate and analyze the change relationship; ⑶Experimental data: Flow regulation experiment data record table Experimenter: Experiment time: 20240725 Flow data adjustment is achieved by changing the inner diameter of the "pressurized tube" (4) Result analysis: When the other conditions (air pressure, nozzle, abrasive, and experimental environment) remain unchanged, the maximum flow rate of 4.95 g / s can be achieved by changing the inner diameter of the "pressurized tube", and the maximum flow rate of 3.71 g / s can be achieved by changing the opening of the airflow regulating valve, indicating that a larger flow regulation can be obtained by changing the inner diameter of the "pressurized tube".

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