CN111805065A

CN111805065A - Gas console of plasma cutting machine and control method

Info

Publication number: CN111805065A
Application number: CN202010666744.2A
Authority: CN
Inventors: 卞江林
Original assignee: Nantong Sunshine Welding And Cutting Equipment Co ltd
Current assignee: Nantong Sunshine Welding And Cutting Equipment Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-10-23

Abstract

The invention discloses a gas control console of a plasma cutting machine and a control method, relates to the technical field of gas cutting, and aims to solve the problems that when different metals are cut, the fineness of cutting gas needs to be adjusted, the existing central gas control console needs to be controlled by a manual input instruction, the corresponding adjustment cannot be automatically made for metal detection, the consumed time is increased when different metals are cut, the cutting efficiency is reduced, and the overhaul time is greatly increased when faults occur. The 13 feet of microcontroller are connected with electric capacity C22 and inductance L2's one end respectively, electric capacity C22's the other end is connected with microcontroller's 60 feet, microcontroller's 12 feet are connected with electric capacity C23, C24, C25, C26's one end respectively, microcontroller's 56, 57, 58, 59, 61 feet are connected with 1, 2, 3, 4, 6 feet of accumulator chip respectively, microcontroller's 5, 6 feet are connected with the both ends of crystal oscillator respectively.

Description

Gas console of plasma cutting machine and control method

Technical Field

The invention relates to the technical field of gas cutting, in particular to a gas console of a plasma cutting machine and a control method.

Background

Cutting gas, through experimental comparison and theoretical discussion to three kinds of gases of propane gas, propylene gas, acetylene gas, it is high, with low costs characteristics and characteristics such as safety, environmental protection that novel propane gas for cutting has an efficiency to demonstrate. When the propane gas is used for cutting the steel plate, the cutting cost is changed along with the thickness of the plate, and when the propane gas is used for cutting the thick steel plate, the cost is saved remarkably, and the propane gas is suitable for cutting waste steel materials. In order to ensure the temperature and controllability in the gas cutting process, the gas for cutting needs to be regulated and controlled by a gas control console.

At present, the central gas console that uses when controlling the gas of cutting, when cutting different metals, need adjust the meticulous of cutting gas, and current central gas console need be controlled for input command, can not detect the metal automatically and make corresponding regulation, and increase consuming time when cutting different metals, reduced cutting efficiency, and repair time greatly increased when breaking down again can not satisfy the user demand. Therefore, a gas console and a control method for a plasma cutting machine are urgently needed in the market to solve the problems.

Disclosure of Invention

The invention aims to provide a gas control console of a plasma cutting machine and a control method, and aims to solve the problems that when different metals are cut, the fineness of cutting gas needs to be adjusted, the existing central gas control console needs to be controlled by a manual input instruction, the metal detection cannot be automatically and correspondingly adjusted, the time consumption is increased when different metals are cut, the cutting efficiency is reduced, the overhaul time is greatly increased when faults occur again, and the use requirements cannot be met.

In order to achieve the purpose, the invention provides the following technical scheme: a gas console of a plasma cutting machine comprises a microcontroller, wherein 13 pins of the microcontroller are respectively connected with one end of a capacitor C22 and one end of an inductor L2, the other end of the inductor L2 is externally connected with a +3.3V power supply, the other end of the capacitor C22 is connected with 60 pins of the microcontroller, 12 pins of the microcontroller are respectively connected with one ends of capacitors C23, C24, C25 and C26, the other ends of the capacitors C23, C24, C25 and C26 and the

pins

1, 32, 48, 64 and 19 of the microcontroller are respectively and externally connected with a +3.3V power supply, pins 56, 57, 58, 59 and 61 of the microcontroller are respectively connected with

pins

1, 2, 3, 4 and 6 of a storage chip, the pins 8 pins of the storage chip are externally connected with a +3.3V power supply, the pins 5 of the storage chip are grounded, the

pins

5 and 6 of the microcontroller are respectively connected with two ends of a crystal oscillator, and two ends of the crystal oscillator are respectively connected with one end of the capacitor C01 and one end of the capacitor C02, the other ends of the capacitor C01 and the capacitor C02 are both grounded,

pins

12, 28 and 60 of the microcontroller are all grounded, the microcontroller adopts STM32F103RC, and the storage chip adopts AT93C 66.

Preferably, the pin 53 of the microcontroller is connected to the negative electrode of the LED1, the positive electrode of the LED1 is connected to one end of the resistor R89, the other end of the resistor R89 is connected to one end of the resistor R90, the other end of the resistor R90 is connected to the positive electrode of the LED2, the resistor R89 and the resistor R90 are both externally connected to a +5V power supply, the negative electrode of the LED2 is grounded, the

pins

46, 49 and 7 of the microcontroller are respectively connected to

pins

2, 3 and 4 of the terminal line DBUG, the

terminals

3 and 5, 1 and 2, 4 and 5 of the terminal line DBUG are respectively connected to the resistor R2, the resistor R1 and the capacitor C5, the pin 1 of the terminal line is externally connected to a +3.3V power supply and is connected to one end of the capacitor C4, and the other end of the capacitor C4 and the pin 5 of the terminal line DBUG are both grounded.

Preferably, pins 36, 34 and 33 of the microcontroller are respectively connected with

pins

14, 10 and 12 of a register U3,

pins

11, 12 and 9 of the register U3 are respectively connected with

pins

11, 12 and 14 of the register U2,

pins

10 and 13 of the register U3 and the register U2 are both externally connected with a +5V power supply and grounded, the pin 10 of the register U3 is respectively connected with one end of a capacitor C6 and one end of a capacitor C7, the other ends of the capacitor C6 and the capacitor C7 are both grounded, 15, 1, 2, 3, 4, 5, 6, 7 of the register U2 are respectively connected with one end of a resistor R3, 4, 5, 6, 7, 8, 9, 10, the other ends of the resistors R3, 4, 5, 6, 7, 8, 9 and 10 are respectively connected with

pins

11, 7, 4, 2, 1, 10, 5 and 3 of the nixie tube,

pins

12, 9 and 8 of the nixie tube are respectively connected with

pins

15, 1 and 2 of the register U3.

Preferably,

pins

45, 41 and 42 of the microcontroller are respectively connected with pins 3 of optocouplers OP5, OP11 and OP12 and respectively connected to resistors R44, R71 and R72, pins 44 and 43 of the microcontroller are connected with pins 6 of optocouplers OP6 and OP10, pins 6 of the optocouplers OP6 and OP10 are respectively connected with one ends of resistors R45 and R70, the other ends of the resistors R45 and R70 and pins 2 of the optocouplers OP5, OP11 and OP12 are respectively externally connected with a +3.3V power supply,

pins

8, 6 and 5 of the optocoupler OP5 are respectively connected with

pins

3, 1 and 2 of a transceiver U5,

pins

2 and 8 of the transceiver U5 are shorted,

pins

7 and 6 of the transceiver U5 are respectively connected with

pins

3 and 2 of a CN5, terminals CN3 and CN3 of the terminal CN5, CN1 and the resistor R5 are respectively connected to the ground, CN 364 and CN5,

pins

3 and 6 of the optical couplers OP10 and OP12 are respectively connected with

pins

1 and 4 of an interface chip U6,

pins

7, 6 and 5 of the interface chip U6 are respectively connected with

pins

1, 2 and 3 of a terminal wire CN2, and a resistor R68 and a resistor R69 are respectively connected between

pins

1 and 2, and

pins

2 and 3 of the terminal wire CN 2.

Preferably, a pin 14 of the microcontroller is connected to a diode D7, a diode D8 and a resistor R81, a capacitor C33 is connected between the positive electrode of the diode D8 and the resistor R81, the other end of the resistor R81 is connected to a pin 1 of an operational amplifier U7A, a pin 1 and a pin 2 of the operational amplifier U7A are shorted, a pin 3 of the operational amplifier U7A is connected to one ends of a resistor R80 and a capacitor C32, a pin 4 of the operational amplifier U7A is connected to one end of a fuse F1, the other ends of the fuse F1, the resistor R80 and the capacitor C80 are connected to

pins

1, 3 and 5 of a terminal CN 80, a capacitor C80 is connected between the pin 1 and the pin 2 of the terminal CN 80, a pin 4 of the terminal CN 80 is connected to a pin 2 of a transistor Q80 and a pin 6 of the operational amplifier U7, a pin 2 of the terminal CN 80 is connected to the resistor R80 and the other end of the resistor R80 and the capacitor R80 are connected to the other end of the resistor R80, the pin 1 of the triode Q11 and the pin 7 of the operational amplifier U7B are respectively connected with two ends of a resistor R83, and the pin 5 of the operational amplifier U7B and the pin 20 of the microcontroller are respectively connected with two ends of a resistor R84.

Preferably, a pin 15 of the microcontroller is connected to a diode D9, a diode D10 and a resistor R86, a capacitor C35 is connected between an anode of the diode D10 and a resistor R86, the other end of the resistor R86 is connected to a pin 8 of an operational amplifier U7C, a pin 9 and a pin 8 of the operational amplifier U7C are shorted, a pin 10 of the operational amplifier U7C is connected to one ends of a resistor R85 and a capacitor C38, the other end of the resistor R85 is connected to a pin 3 of a terminal line CN 85,

pins

1 and 2 of the terminal line CN 85 are connected to one ends of a capacitor C85 and a capacitor C85, the other ends of the capacitor C85 and the capacitor C85 are grounded, a pin 4 of the terminal line CN 85, the capacitor C85 and the capacitor C85 are grounded, a pin 16 of the microcontroller is connected to the diode D85, the diode D85 and the resistor R85, and a pin 891 of the resistor R85 is connected to the other end of the resistor R85 and the resistor R8914, the pin 13 and the pin 14 of the operational amplifier U7D are in short circuit, the pin 12 of the operational amplifier U7D is respectively connected with one end of a resistor R88 and one end of a capacitor C42, and the other end of the resistor R88 is connected with the pin 3 of a terminal line CN 5.

Preferably, 8 feet of the microcontroller are respectively connected with a resistor R15 and a resistor R16, the resistor R15 and the resistor R16 are respectively connected with 1 and 2 feet of a field effect transistor Q1, 3 feet of the field effect transistor Q1 are connected with 1 foot of a relay JDQ4, 1 foot and 2 foot of the relay JDQ4 are respectively connected with the positive electrode and the negative electrode of a diode D13, 3 and 4 feet of the relay jd 4 are respectively connected with 1 and 2 feet of a connecting terminal CP2, a resistor R19 and a capacitor C11 are connected between 3 feet and 4 feet of the relay JDQ4, the breaker structure is provided with seven groups, and the rest six groups of breaker structures are respectively connected with 9, 10, 11, 24, 25 and 37 feet of the microcontroller.

Preferably, a pin 38 of the microcontroller is connected with a resistor R38 and a resistor R39, the resistor R38 and the resistor R39 are connected with

pins

1 and 2 of a field effect transistor Q5, a pin 3 of the field effect transistor Q5 is connected with a pin 1 of a relay JDQ1, a pin 1 and a pin 2 of the relay JDQ1 are connected with the positive electrode and the negative electrode of a diode D2, a pin 1 and a pin 2 of a connecting terminal CP4 are connected with a pin jd 1, the upper control output structure is provided with three groups, the other two groups are connected with

pins

39 and 40 of the microcontroller, and

pins

3 and 4 of the relay JDQ2 and the pin JDQ3 are connected with

pins

3, 4, 5 and 6 of a connecting terminal CP 4.

Preferably, the pins 51 and 52 of the microcontroller are respectively connected with a 4-pin of a photocoupler OP13 and a photocoupler OP14, the pins 51 and 52 of the microcontroller are respectively connected with a resistor R78 and a resistor R79, the other ends of the resistor R78 and the resistor R79 are respectively externally connected with a +3.3V power supply, the pins OP13 and 3 of the photocoupler OP14 are shorted, the pins OP13 and 1 of the photocoupler OP14 are respectively connected with a capacitor C20 and a capacitor C21, the pin 2 of the photocoupler OP13 is respectively connected with a capacitor C20 and a resistor R76, the pin 2 of the photocoupler OP14 is respectively connected with a capacitor C21 and a resistor R77, the resistor R76 and a resistor R77 are respectively connected with the

pins

1 and 3 of a connecting terminal CP5, and the pin 2 and the pin 4 of the connecting terminal CP5 are shorted and grounded.

A control method of a gas console of a plasma cutting machine comprises the following steps:

step 1-1: when the device is used, the two working states of air/oxygen and nitrogen/nitrogen are called air/air and air/water for short, after a power supply is turned on, a V3/V7 (cooling liquid control valve) is opened, and after the power supply is cut off, the cooling liquid control valve is closed;

step 1-2: the P3 provides different gas flows according to different JOPs, the console receives a numerical control system starting signal, a gas valve V1/V5 (installed in a high-frequency box) is opened, the P3 works in a state 1 (small arc), after arc striking is successful (T2 has current), the P3 works in a state 2, V2 is opened, V3 is closed after 0.5 second delay, P3 slowly decreases to the state 1 after stopping working, V3 is opened, V2 is closed after 0.5 second delay, V1/V5 is closed after 15 seconds delay, and if arc striking is not finished, arc striking still works according to the logic;

step 1-3: when the console is empty or empty, the console is powered on, then V3/V7 are normally open, and P3 works in the state 1/2 respectively;

step 1-4: when the water/air is empty, V3/V7 is normally open after the console is electrified, a normally open signal K5 (controlling a spray pump, and the other states are normally closed) is output, the working logic of V5/P3 is the same as that of the air, V1 does not work, and the working time sequence of V4 is the same as that of V1 in other states.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the device, through the arrangement of a relay and a current sensor, a console receives a numerical control system starting signal, a front gas V1/V5 is opened, the front gas time is set to be 2S, a high-frequency relay is controlled to work after 2S delay, meanwhile, a relay of a main machine is controlled to be closed (K1), a welding machine outputs arc striking current, a built-in current sensor T1 (a cutting gun end) detects a current signal, namely, K2 is opened (high frequency), a sensor T2 detects that the current is successful in arc striking, the working pressure of a proportional valve is switched as required, meanwhile, K3/K4 is closed, and K1 (a control main machine) is opened after cutting is stopped. The problem of can control the striking current to detect the striking current, thereby make corresponding switching instruction, improved safe in utilization stability ability is solved.

2. The device can judge whether the arc striking is successful or not by the on-off of the light emitting diode through the arrangement of the light emitting diode, the register can register the digital instruction to convert the digital instruction, and the abnormal instruction which can be detected by the digital tube is displayed on the digital tube by the digital code, so that the straight line fault information can be accurate, and the maintenance can be conveniently carried out by a worker. The method comprises the steps of detecting and displaying the flow of cooling liquid, alarming at low pressure (water shortage), alarming at high temperature of the cooling liquid, alarming at fault code 802, alarming at low pressure of gas flow, alarming at fault code 803, alarming unsuccessfully in 2 seconds (current cannot be detected by a ground wire) at fault code 808, alarming when the electrode is exhausted, and alarming at fault code 809.

Drawings

FIG. 1 is a pin diagram of a microcontroller according to the present invention;

FIG. 2 is a wiring diagram of the microcontroller of the present invention;

FIG. 3 is a schematic diagram of a fine plasma gas box of the present invention;

FIG. 4 is a communication circuit diagram of the present invention;

FIG. 5 is a power supply regulation circuit diagram of the present invention;

FIG. 6 is a circuit diagram of a current sensor of the present invention;

FIG. 7 is a circuit diagram of a voltage sensor of the present invention;

fig. 8 is a circuit diagram of the circuit breaker structure of the present invention;

FIG. 9 is an output circuit diagram of the present invention;

FIG. 10 is an input circuit diagram of the present invention;

FIG. 11 is a circuit diagram of a digital display according to the present invention.

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.

Referring to fig. 1-11, an embodiment of the present invention: a gas console of a plasma cutting machine comprises a microcontroller, wherein a pin 13 of the microcontroller is respectively connected with one end of a capacitor C22 and one end of an inductor L2, the other end of an inductor L2 is externally connected with a +3.3V power supply, the other end of a capacitor C22 is connected with a pin 60 of the microcontroller, a pin 12 of the microcontroller is respectively connected with one end of a capacitor C23, a capacitor C24, a capacitor C25 and a capacitor C26, the other end of the capacitor C23, a capacitor C24, a capacitor C25 and a pin C26 of the microcontroller and

pins

1, 32, 48, 64 and 19 of the microcontroller are respectively externally connected with a +3.3V power supply, pins 56, 57, 58, 59 and 61 of the microcontroller are respectively connected with

pins

1, 2, 3, 4 and 6 of a storage chip, a pin 8 of the storage chip is externally connected with a +3.3V power supply, a pin 5 of the storage chip is grounded,

pins

5 and 6 of the microcontroller are respectively connected with two ends of a crystal oscillator, two ends of the crystal oscillator are respectively connected with one end of a capacitor C01 and one end of a capacitor C,

pins

12, 28 and 60 of the microcontroller are grounded, the microcontroller adopts STM32F103RC, and the storage chip adopts AT93C 66. The crystal oscillator can work the crystal with mutual conversion of electric energy and mechanical energy in a resonance state to provide stable and accurate single-frequency oscillation and provide a basic clock signal for a system, thereby improving the use stability.

Further, pin 53 of the microcontroller is connected to a negative electrode of the LED1, a positive electrode of the LED1 is connected to one end of the resistor R89, the other end of the resistor R89 is connected to one end of the resistor R90, the other end of the resistor R90 is connected to a positive electrode of the LED2, the resistor R89 and the resistor R90 are both externally connected to a +5V power supply, a negative electrode of the LED2 is grounded,

pins

46, 49 and 7 of the microcontroller are respectively connected to

pins

2, 3 and 4 of a terminal line DBUG, the resistors R2, R1 and a capacitor C5 are respectively connected between

pins

3 and 5, 1 and 2, 4 and 5 of the terminal line DBUG, a pin 1 of the terminal line is externally connected to a +3.3V power supply and is connected to one end of the capacitor C4, and the other end of the capacitor C4 and a pin 5 of the terminal line DBUG are both grounded. When the central gas console fails in use, the internal devices can be reset through the terminal lines DBUG, so that the internal devices are redefined for use.

Furthermore, pins 36, 34 and 33 of the microcontroller are respectively connected with

pins

14, 10 and 12 of a register U3,

pins

11, 12 and 9 of a register U3 are respectively connected with

pins

11, 12 and 14 of a register U2,

pins

10 and 13 of the register U3 and the register U2 are respectively externally connected with a +5V power supply and grounded, pin 10 of a register U3 is respectively connected with one end of a capacitor C6 and a capacitor C7, the other end of the capacitor C6 and the other end of the capacitor C7 are both grounded, the other ends of the registers U2, 15, 1, 2, 3, 4, 5, 6 and 7 are respectively connected with one ends of resistors R3, 4, 5, 6, 7, 8, 9 and 10, the other ends of the resistors R3, 4, 5, 6, 7, 8, 9 and 10 are respectively connected with

pins

11, 7, 4, 2, 1, 10, 5 and 3 of the nixie tube, and

pins

12, 9 and 8 of the nixie tube are respectively connected with

pins

15, 1 and 2 of a register U3. The digital tube can convert the detected fault information into digital codes, so that the digital codes are displayed on the digital tube, and the quick linear fault information of the working personnel is facilitated.

Furthermore,

pins

45, 41 and 42 of the microcontroller are respectively connected with pins 3 of optical couplers OP5, OP11 and OP12, and respectively connected with resistors R44, R71 and R72, pins 44 and 43 of the microcontroller are connected with pins 6 of optical couplers OP6 and OP10, pins 6 of optical couplers OP6 and OP10 are respectively connected with one ends of resistors R10 and R10, the other ends of the resistors R10 and R10 are respectively connected with pins 2 of the optical couplers OP10, OP10 and OP10 which are externally connected with a +3.3V power supply,

pins

8, 6 and 5 of the optical coupler OP10 are respectively connected with

pins

3, 1 and 2 of the transceiver U10,

pins

2 and 8 of the transceiver U10 are shorted,

pins

7 and 6 of the transceiver U10 are respectively connected with

pins

3 and 2 of a terminal CN 10, a terminal CN3 and CN3 of the terminal CN3, CN1 and 2 terminals CN 72 are respectively connected with pins CN3, CN3 and CN3 of the optical coupler pin CN 72, CN3 and CN3, CN3 and CN 72, CN3 and CN3 are respectively connected with the pin 10, CN3 and CN3, CN 72, CN3,

Pins

7, 6 and 5 of the interface chip U6 are respectively connected with

pins

1, 2 and 3 of the terminal wire CN2, and a resistor R68 and a resistor R69 are respectively connected between

pins

1 and 2, and between

pins

2 and 3 of the terminal wire CN 2. A communication channel can be established between the gas console and the terminal, so that the working state of the gas console can be shared with the terminal.

Further, a pin 14 of the microcontroller is connected to a diode D7, a diode D8 and a resistor R81, respectively, a capacitor C33 is connected between the anode of the diode D8 and the resistor R81, the other end of the resistor R81 is connected to a pin 1 of the operational amplifier U7 81, the pin 1 of the operational amplifier U7 81 is shorted to a pin 2, a pin 3 of the operational amplifier U7 81 is connected to one ends of the resistor R81 and the capacitor C81, respectively, a pin 4 of the operational amplifier U7 81 is connected to one end of a fuse F81, the other ends of the fuse F81, the resistor R81 and the capacitor C81 are connected to

pins

1, 3 and 5 of a terminal CN 81, a capacitor C81 is connected between the pin 1 and the pin 2 of the terminal CN 81, the pin 4 of the resistor CN 81 is connected to a pin 2 of the transistor Q81 and a pin 6 of the operational amplifier U7, the pin 2 of the transistor Q81 is connected to the resistor R81 and the other end of the resistor R81, the resistor R81 and the other end of the resistor R81 are connected to ground, the resistor R81, the other end of the transistor 81 and the resistor R36, the pin 5 of the operational amplifier U7B and the pin 20 of the microcontroller are connected to two ends of a resistor R84. The conversion between the control voltages can be performed, so that the stable work of the gas control platform is ensured.

Furthermore, a pin 15 of the microcontroller is connected with a diode D9, a diode D10 and a resistor R86 respectively, a capacitor C35 is connected between the anode of the diode D10 and the resistor R86, the other end of the resistor R86 is connected with a pin 8 of the operational amplifier U7C, a pin 9 and a pin 8 of the operational amplifier U7C are shorted, a pin 10 of the operational amplifier U7C is connected with one ends of the resistor R C and the capacitor C C respectively, the other end of the resistor R C is connected with a pin 3 of a terminal line CN C,

pins

1 and 2 of the terminal line CN C are connected with one ends of the capacitor C C and the capacitor C C respectively, the other ends of the capacitor C C and the capacitor C C are grounded, a pin 4 of the terminal line CN C, the capacitor C C and the capacitor C C are grounded, a pin 16 of the microcontroller is connected with the diode D C, the diode D C and the resistor R C, the other end of the diode D C is connected with the operational amplifier U3614, the other end of the resistor R C is connected with the operational amplifier U3614, the 12 pins of the operational amplifier U7D are connected to one end of the resistor R88 and one end of the capacitor C42, respectively, and the other end of the resistor R88 is connected to the 3 pin of the terminal line CN 5. The operational amplifier U7C and the operational amplifier U7D can amplify the detected voltage and current signals, thereby monitoring the voltage and current of the operating circuit.

Further, 8 pins of the microcontroller are respectively connected with a resistor R15 and a resistor R16, a resistor R15 and a resistor R16 are respectively connected with 1 pin and 2 pins of a field effect transistor Q1, 3 pins of the field effect transistor Q1 are connected with 1 pin of a relay JDQ4, 1 pin and 2 pins of the relay JDQ4 are respectively connected with the positive electrode and the negative electrode of a diode D13, 3 pins and 4 pins of a relay JDQ4 are respectively connected with 1 pin and 2 pins of a connecting terminal CP2, a resistor R19 and a capacitor C11 are connected between 3 pins and 4 pins of the relay JDQ4, the breaker structure is provided with seven groups, and the rest six groups of breaker structures are respectively connected with 9 pins, 10 pins, 11 pins, 24 pins, 25 pins and 37 pins of the microcontroller. The detection can be protected by a circuit breaker structure.

Further, a pin 38 of the microcontroller is connected with a resistor R38 and a resistor R39 respectively, a resistor R38 and a resistor R39 are connected with

pins

1 and 2 of a field effect transistor Q5 respectively, a pin 3 of the field effect transistor Q5 is connected with a pin 1 of a relay JDQ1, a pin 1 and a pin 2 of the relay JDQ1 are connected with a positive electrode and a negative electrode of a diode D2 respectively, a pin JDQ1 of the relay is connected with

pins

1 and 2 of a connection terminal CP4 respectively, the upper-complaint control output structure is provided with three groups, the other two groups are connected with

pins

39 and 40 of the microcontroller respectively, and

pins

3 and 4 of the relay JDQ2 and the pin JDQ3 are connected with

pins

3, 4, 5 and 6 of the connection terminal CP4 respectively. The electric field effect of the input loop can be controlled through the field effect transistor to control the current of the output loop.

Further, pins 51 and 52 of the microcontroller are respectively connected with a 4-pin of a photoelectric coupler OP13 and a photoelectric coupler OP14, pins 51 and 52 of the microcontroller are respectively connected with a resistor R78 and a resistor R79, the other ends of the resistor R78 and the resistor R79 are externally connected with a +3.3V power supply, a photoelectric coupler OP13 and a 3-pin of the photoelectric coupler OP14 are in short circuit, pins 1 of the photoelectric coupler OP13 and the photoelectric coupler OP14 are respectively connected with a capacitor C20 and a capacitor C21, a pin 2 of the photoelectric coupler OP13 is respectively connected with a capacitor C20 and a resistor R76, a pin 2 of the photoelectric coupler OP14 is respectively connected with a capacitor C21 and a resistor R77, a resistor R76 and a resistor R77 are respectively connected with

pins

1 and 3 of a connecting terminal CP5, and a pin 2 of the connecting terminal CP5 is in short circuit with a pin 4 and is grounded. The input circuit and the output circuit of the photoelectric coupler are mutually isolated, and the electric signal has the advantages of unidirectionality and the like during transmission, so that the photoelectric coupler has good electromagnetic wave interference resistance and electrical insulation capability.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a plasma cutting machine gas control platform, includes microcontroller, its characterized in that: the pin 13 of the microcontroller is respectively connected with one end of a capacitor C22 and one end of an inductor L2, the other end of the inductor L2 is externally connected with a +3.3V power supply, the other end of the capacitor C22 is connected with a pin 60 of the microcontroller, the pin 12 of the microcontroller is respectively connected with one end of a capacitor C23, a C24, a C25 and a C26, the other end of the capacitor C23, a C24, a C25 and a C26 and the pins 1, 32, 48, 64 and 19 of the microcontroller are respectively externally connected with a +3.3V power supply, the pins 56, 57, 58, 59 and 61 of the microcontroller are respectively connected with the pins 1, 2, 3, 4 and 6 of a memory chip, the pin 8 of the memory chip is externally connected with a +3.3V power supply, the pin 5 of the memory chip is grounded, the pins 5 and 6 of the microcontroller are respectively connected with the two ends of a crystal oscillator, the two ends of the crystal oscillator are respectively connected with one end of a capacitor C01 and one end of a capacitor C02, and the other end of the capacitor C8925, pins 12, 28, 60 of the microcontroller are all grounded, the microcontroller employs STM32F103RC, and the memory chip employs AT93C 66.

2. The plasma cutter gas console of claim 1, wherein: the negative pole of 53 feet and emitting diode LED1 of microcontroller is connected, emitting diode LED 1's positive pole is connected with resistance R89's one end, resistance R89's the other end is connected with resistance R90's one end, resistance R90's the other end and emitting diode LED 2's positive pole are connected, resistance R89 and resistance R90 are all external +5V power, emitting diode LED 2's negative pole ground connection, microcontroller's 46, 49, 7 feet are connected with terminal line DBUG's 2, 3, 4 feet respectively, insert resistance R2 between 3 and 5, 1 and 2, 4 and 5 of terminal line DBUG respectively, resistance R1, electric capacity C5, terminal line 1 foot is external +3.3V power and is connected with the one end of electric capacity C4, the other end of electric capacity C4 and terminal line DBUG's 5 feet are all ground connection.

3. The plasma cutter gas console of claim 1, wherein: pins 36, 34 and 33 of the microcontroller are respectively connected with pins 14, 10 and 12 of a register U3, pins 11, 12 and 9 of the register U3 are respectively connected with pins 11, 12 and 14 of the register U2, pins 10 and 13 of the register U3 and the register U2 are both externally connected with a +5V power supply and grounded, the pin 10 of the register U3 is respectively connected with one end of a capacitor C6 and one end of a capacitor C7, the other ends of the capacitor C6 and the capacitor C7 are both grounded, 15, 1, 2, 3, 4, 5, 6, 7 of the register U2 are respectively connected with one end of a resistor R3, 4, 5, 6, 7, 8, 9, 10, the other ends of the resistors R3, 4, 5, 6, 7, 8, 9 and 10 are respectively connected with pins 11, 7, 4, 2, 1, 10, 5 and 3 of the nixie tube, pins 12, 9 and 8 of the nixie tube are respectively connected with pins 15, 1 and 2 of the register U3.

4. The plasma cutter gas console of claim 1, wherein: pins 45, 41 and 42 of the microcontroller are respectively connected with pins 3 of optical couplers OP5, OP11 and OP12 and respectively connected into resistors R44, R71 and R72, pins 44 and 43 of the microcontroller are connected with pins 6 of optical couplers OP6 and OP10, pins 6 of optical couplers OP6 and OP10 are respectively connected with one ends of resistors R45 and R70, the other ends of the resistors R45 and R70 and pins 2 of the optical couplers OP5, OP11 and OP12 are externally connected with a +3.3V power supply, pins 8, 6 and 5 of the optical coupler OP5 are respectively connected with pins 3, 1 and 2 of a transceiver U5, pins 2 and 8 of the transceiver U5, pins 7 and 6 of the transceiver U5 are respectively connected with pins 3 and 2 of a terminal CN 72, and a resistor CN 72 and a resistor CN5 are respectively connected between pins 2 and pins 3, 1 of the terminal CN5 and the resistor R72 and the pin CN + CN5 and the resistor CN5 are respectively connected into a ground wire CN 364 and CN5, pins 3 and 6 of the optical couplers OP10 and OP12 are respectively connected with pins 1 and 4 of an interface chip U6, pins 7, 6 and 5 of the interface chip U6 are respectively connected with pins 1, 2 and 3 of a terminal wire CN2, and a resistor R68 and a resistor R69 are respectively connected between pins 1 and 2, and pins 2 and 3 of the terminal wire CN 2.

5. The plasma cutter gas console of claim 1, wherein: a pin 14 of the microcontroller is connected with a diode D7, a diode D8 and a resistor R81, a capacitor C33 is connected between the anode of the diode D8 and a resistor R81, the other end of the resistor R81 is connected with a pin 1 of an operational amplifier U7A, the pin 1 and a pin 2 of the operational amplifier U7A are short-circuited, a pin 3 of the operational amplifier U7A is connected with one ends of a resistor R80 and a capacitor C32, the pin 4 of the operational amplifier U7A is connected with one end of a fuse F1, the other ends of the fuse F1, the resistor R80 and the capacitor C80 are connected with pins 1, 3 and 5 of a terminal line CN 80, a capacitor C80 is connected between the pin 1 and the pin 2 of the terminal line CN 80, the pin 4 of the terminal line CN 80 is connected with a pin 2 of a triode Q80 and a pin 6 of the operational amplifier U7 80, the pin 2 of the triode Q80 is connected with the resistor R80 and the other end of the capacitor R80, the resistor R80 are grounded, the pin 1 of the triode Q11 and the pin 7 of the operational amplifier U7B are respectively connected with two ends of a resistor R83, and the pin 5 of the operational amplifier U7B and the pin 20 of the microcontroller are respectively connected with two ends of a resistor R84.

6. The plasma cutter gas console of claim 1, wherein: a pin 15 of the microcontroller is respectively connected with a diode D9, a diode D10 and a resistor R86, a capacitor C35 is connected between the anode of the diode D10 and a resistor R86, the other end of the resistor R86 is connected with a pin 8 of an operational amplifier U7C, a pin 9 and a pin 8 of the operational amplifier U7C are short-circuited, a pin 10 of the operational amplifier U7C is respectively connected with one end of a resistor R85 and one end of a capacitor C38, the other end of the resistor R85 is connected with a pin 3 of a terminal line CN 85, pins 1 and 2 of the terminal line CN 85 are respectively connected with one end of the capacitor C85 and one end of the capacitor C85, the other ends of the capacitor C85 and the capacitor C85 are both grounded, a pin 4 of the terminal line CN 85, the capacitor C85 and the capacitor C85 are all grounded, a pin 16 of the microcontroller is respectively connected with the diode D85, the diode D85 and the resistor R85, the other end of the resistor R891 of the diode D85 is connected with the other end of the resistor R3614, the pin 13 and the pin 14 of the operational amplifier U7D are in short circuit, the pin 12 of the operational amplifier U7D is respectively connected with one end of a resistor R88 and one end of a capacitor C42, and the other end of the resistor R88 is connected with the pin 3 of a terminal line CN 5.

7. The plasma cutter gas console of claim 1, wherein: microcontroller's 8 feet are connected with resistance R15, resistance R16 respectively, resistance R15 and resistance R16 are connected with field effect transistor Q1's 1, 2 feet respectively, field effect transistor Q1's 3 feet are connected with relay JDQ 4's 1 foot, relay JDQ 4's 1 foot and 2 feet are connected with diode D13 just, the negative pole respectively, relay JDQ 4's 3, 4 feet are connected with binding post CP 2's 1, 2 respectively, access resistance R19 and electric capacity C11 between relay JDQ 4's 3 feet and 4 feet, above-mentioned circuit breaker structure is provided with seven groups, and all the other six circuit breaker structures are connected with microcontroller's 9, 10, 11, 24, 25, 37 feet respectively.

8. The plasma cutter gas console of claim 1, wherein: the pin 38 of the microcontroller is respectively connected with a resistor R38 and a resistor R39, the resistor R38 and the resistor R39 are respectively connected with pins 1 and 2 of a field effect tube Q5, the pin 3 of the field effect tube Q5 is connected with the pin 1 of a relay JDQ1, the pin 1 and the pin 2 of the relay JDQ1 are respectively connected with the positive electrode and the negative electrode of a diode D2, the pin JDQ1 of the relay is respectively connected with pins 1 and 2 of a connecting terminal CP4, the upper complaint control output structure is provided with three groups, the other two groups are respectively connected with pins 39 and 40 of the microcontroller, and the pins 3 and 4 of the relay JDQ2 and the pin JDQ3 are respectively connected with pins 3, 4, 5 and 6 of the connecting terminal CP 4.

9. The plasma cutter gas console of claim 1, wherein: pins 51 and 52 of the microcontroller are respectively connected with a photoelectric coupler OP13 and a pin 4 of a photoelectric coupler OP14, pins 51 and 52 of the microcontroller are respectively connected with a resistor R78 and a resistor R79, the other ends of the resistor R78 and the resistor R79 are externally connected with a +3.3V power supply, pins OP13 and 3 of the photoelectric coupler OP14 are in short circuit, pins 1 of the photoelectric coupler OP13 and the photoelectric coupler OP14 are respectively connected with a capacitor C20 and a capacitor C21, pins 2 of the photoelectric coupler OP13 are respectively connected with a capacitor C20 and a resistor R76, pins 2 of the photoelectric coupler OP14 are respectively connected with a capacitor C21 and a resistor R77, the resistor R76 and a resistor R77 are respectively connected with pins 1 and 3 of a connecting terminal CP5, and pins 2 and 4 of the CP5 are in short circuit and are grounded.

10. The control method of the gas console of the plasma cutting machine according to any one of claims 1 to 7, characterized by comprising the following steps: