CN214098207U - CNC control circuit of plasma cutting machine - Google Patents
CNC control circuit of plasma cutting machine Download PDFInfo
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- CN214098207U CN214098207U CN202120400860.XU CN202120400860U CN214098207U CN 214098207 U CN214098207 U CN 214098207U CN 202120400860 U CN202120400860 U CN 202120400860U CN 214098207 U CN214098207 U CN 214098207U
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Abstract
The utility model belongs to the field of plasma cutting machines, in particular to a CNC control circuit of a plasma cutting machine, which is characterized in that the circuit comprises a voltage signal isolation module used for being connected with an external mainboard input port and an external CNC voltage detection port, and a current detection signal isolation module used for being connected with an external dry reed pipe and an external CNC current detection port; the voltage signal isolation module comprises a voltage signal isolator for isolating voltage signals, and the current detection signal isolation module comprises a current detection signal isolator for isolating current detection signals. The utility model discloses in, above-mentioned voltage signal isolator and current detection signal isolator set up, can realize reducing signal interference to make voltage signal be in within the safe voltage.
Description
Technical Field
The utility model belongs to the plasma cutting machine field, in particular to plasma cutting machine CNC control circuit.
Background
The inverter plasma cutting machine has become a common tool in modern industry, and the working principle is as follows: the plasma is gas which is heated to extremely high temperature and is highly ionized, the plasma transfers the electric arc power to the workpiece, the workpiece is melted and blown off by high heat, and the working state of plasma arc cutting is formed; the compressed air is distributed into two paths by the air chamber after entering the cutting torch, namely plasma gas and auxiliary gas are formed, the plasma gas arc plays a role in melting metal, and the auxiliary gas cools each part of the cutting torch and blows off the melted metal. CNC is an automated machine tool equipped with a programmed control system. The control system is capable of logically processing a program having a control code or other code specified by the bai number command, and decoding the program to operate the machine tool to machine the part.
In the prior art, a plasma cutting machine is used on a CNC, and a current detection signal, a voltage signal and a switch control signal are required to be provided for the CNC; however, the existing voltage signal directly takes the output voltage of the plasma cutting machine, and the output voltage of the plasma cutting machine is about DC220V-280V, so the voltage is unsafe, isolation control is not needed, and signal interference is large.
Disclosure of Invention
In order to solve the above problem, the utility model discloses a first order aim at provides a plasma cutting machine CNC control circuit, and this control circuit can make voltage signal and current detection signal advance to get keep apart, reduces signal interference to make voltage signal be in within the safe voltage.
Another object of the utility model is to provide a plasma cutting machine CNC control circuit, this control circuit simple structure is convenient for realize.
In order to achieve the above object, the technical solution of the present invention is as follows.
A CNC control circuit of a plasma cutting machine is characterized by comprising a voltage signal isolation module for helping the CNC to detect the arc voltage of a cutting gun, and a current detection signal isolation module for helping the CNC to detect a current detection signal of the plasma cutting machine; the voltage signal isolation module comprises a voltage signal isolator for isolating voltage signals, and the current detection signal isolation module comprises a current detection signal isolator for isolating current detection signals. In this circuit, the voltage signal that outside mainboard input port input to CNC voltage detection port is kept apart through the voltage signal isolation piece in the voltage signal isolation module, and CNC can detect the voltage signal after the process of keeping apart of inputing to CNC voltage detection port to realize that CNC detects this process of arc pressure of cutting torch, and then control the action of arcing. The current detection signal isolating piece of the current detection signal isolating module isolates a current detection signal input to an external CNC current detection port by an external reed pipe so as to realize the process of detecting the current detection signal of the CNC plasma cutting machine and further enable the CNC to control the walking action. The voltage signal isolator and the current detection signal isolator are arranged, so that the CNC can reduce signal interference when detecting voltage signals and current detection signals, and the voltage signals are in safe voltage. Wherein, the voltage signal isolator and the current detection signal isolator are realized by components with isolation effect such as a relay or an optical coupler. And the control circuit has simple structure and is convenient to realize. CNC is combined with plasma cutting machines as prior art.
Furthermore, an operational amplifier U3 is further included in the voltage signal isolation module, and the operational amplifier U3 is connected with the voltage signal isolation piece, so that the voltage signal enters the voltage signal isolation piece after passing through the operational amplifier U3. The operational amplifier U3 may amplify the voltage signal before entering the voltage signal isolator such that the voltage signal has a certain strength after being isolated by the voltage signal isolator.
Further, the voltage signal isolation module further comprises a voltage filter circuit, and the voltage filter circuit is connected with the operational amplifier U3, so that the voltage signal is filtered by the voltage filter circuit and then enters the operational amplifier U3 and then enters the voltage signal isolator for isolation. The voltage filter circuit filters the voltage signals entering the voltage signal isolation module, and the filtered voltage signals are amplified by the operational amplifier U3 and then enter the voltage signal isolation part for isolation.
Furthermore, the voltage signal isolation module further includes an operational amplifier U4A, and the voltage signal isolation device is connected to the operational amplifier U4A, so that the voltage signal isolated by the voltage signal isolation device enters the operational amplifier U4A.
Further, the voltage signal isolation module further comprises an operational amplifier U4B, and the operational amplifier U4B is connected with the operational amplifier U4A. The operational amplifier U4B and the operational amplifier U4A are arranged to amplify the voltage signal isolated by the voltage signal isolator.
Further, the voltage signal isolator is a linear optocoupler U2; and the model of the linear optocoupler U2 is HCNR 200.
Further, the current detection signal isolator is a relay K1.
Furthermore, the voltage signal isolation module further comprises a connection circuit for connecting the external main board control switch port with the gun switch control port. The port of the main board control switch and the port of the gun switch control switch are interface structures on the existing plasma cutting machine. The port of the main board control switch controls the opening or closing of the cutting gun through the port of the gun switch control.
Furthermore, the circuit also comprises a power supply module powered by an external mainboard, and the voltage signal isolation module and the current detection signal isolation module are both connected with the power supply module. The power supply module provides voltage for the voltage signal isolation module and the current detection signal isolation module.
Further, the power module comprises a rectifier bridge B1, a power filter circuit for filtering, a voltage stabilizer U1, a direct current power supply isolation piece B2 for isolating voltage signals; the rectifier bridge B1, the power filter circuit, the voltage stabilizer and the direct current power supply isolator B2 are connected in sequence.
The beneficial effects of the utility model reside in that, compare in prior art the utility model discloses in, the voltage signal that the voltage signal spacer in the module is kept apart to outside mainboard input port input to CNC voltage detection port's voltage signal, CNC can detect the voltage signal after the process of input to CNC voltage detection port keeps apart to realize that CNC detects this process of arc pressure of cutting torch, and then the control action of striking an arc. The current detection signal isolating piece of the current detection signal isolating module isolates a current detection signal input to an external CNC current detection port by an external reed pipe so as to realize the process of detecting the current detection signal of the CNC plasma cutting machine and further enable the CNC to control the walking action. The voltage signal isolator and the current detection signal isolator are arranged, so that the CNC can reduce signal interference when detecting voltage signals and current detection signals, and the voltage signals are in safe voltage.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the voltage signal isolation module of the present invention.
Fig. 3 is a schematic circuit diagram of the power module of the present invention.
Fig. 4 is a schematic circuit diagram of the current detection signal isolation module of the present invention.
Fig. 5 is a block diagram of a CNC plasma cutting machine using the circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A CNC control circuit of a plasma cutting machine is characterized by comprising a voltage signal isolation module and a current detection signal isolation module, wherein the voltage signal isolation module is used for being connected with an external mainboard input port and an external CNC voltage detection port, and the current detection signal isolation module is used for being connected with an external reed pipe and an external CNC current detection port; the voltage signal isolation module comprises a voltage signal isolator for isolating voltage signals, and the current detection signal isolation module comprises a current detection signal isolator for isolating current detection signals.
Furthermore, an operational amplifier U3 is further included in the voltage signal isolation module, and the operational amplifier U3 is connected with the voltage signal isolation piece, so that the voltage signal enters the voltage signal isolation piece after passing through the operational amplifier U3.
Further, the voltage signal isolation module further comprises a voltage filter circuit, and the voltage filter circuit is connected with the operational amplifier U3, so that the voltage signal is filtered by the voltage filter circuit and then enters the operational amplifier U3 and then enters the voltage signal isolator for isolation.
Furthermore, the voltage signal isolation module further includes an operational amplifier U4A, and the voltage signal isolation device is connected to the operational amplifier U4A, so that the voltage signal isolated by the voltage signal isolation device enters the operational amplifier U4A.
Further, the voltage signal isolation module further comprises an operational amplifier U4B, and the operational amplifier U4B is connected with the operational amplifier U4A.
Further, the voltage signal isolator is a linear optocoupler U2; and the model of the linear optocoupler U2 is HCNR 200.
Furthermore, the voltage signal isolation module further comprises a connection circuit for connecting the external main board control switch port with the gun switch control port.
Specifically, the voltage filter circuit comprises an inductor R1, an inductor R7, an inductor R2, a capacitor C10, an inductor R6, an inductor R3, a capacitor C11, an inductor R5 and a capacitor C12; the connection circuit is an interface CON6 for connecting an external main board control switch port interface CON7 and for connecting an external gun switch control port, and the interface CON7 is connected with the interface CON 6.
Further, the current detection signal isolator is a relay K1.
Furthermore, the circuit also comprises a power supply module powered by an external mainboard, and the voltage signal isolation module and the current detection signal isolation module are both connected with the power supply module.
Further, the power module comprises a rectifier bridge B1, a power filter circuit for filtering, a voltage stabilizer U1, a direct current power supply isolation piece B2 for isolating voltage signals; the rectifier bridge B1, the power filter circuit, the voltage stabilizer and the direct current power supply isolator B2 are connected in sequence.
Specifically, the dc power supply isolator B2 includes a polar capacitor C3, a polar capacitor C2, a capacitor C7, a capacitor C8, and an inductor L1. Voltage regulator U1 is specifically model LM 7815. The direct current power supply isolator B2 is specifically an isolation module power supply chip with 12-12V-15V DC-DC, such as a chip with the preferred model number of B1215S-1W.
Referring to fig. 1 to 4, any one of the interface CON1 and the interface CON2 is connected to a motherboard, and a voltage is input to the power module through the motherboard. The interface CON3 is connected to the input port of the motherboard, and the input voltage of the interface is approximately between DC220V-280V according to model. Interface CON4 is connected with the tongue tube, and interface CON5 is connected with CNC current detection port. Pins 1-3 of the interface CON6 are connected to the CNC voltage detection port, and pins 4-5 of the CON6 are connected to the gun switch control port. The interface CON7 is connected to the motherboard control switch port.
The utility model discloses a this circuit is for the application in CNC plasma cutting machine (be CNC + plasma cutting machine) to help plasma cutting machine carries out work under CNC control. Wherein how CNC achieves control of the plasma cutter is prior art. The cutting process of the plasma cutting machine under CNC control comprises the following steps: starting a CNC switch, detecting arc voltage (realized by a voltage signal isolation module), ventilating and lifting a torch and striking an arc (realized by a connecting circuit of the voltage signal isolation module), detecting current (realized by a current detection signal isolation module), CNC control of cutting torch walking, cutting process, arc extinguishing and stopping. The plasma cutting machine is a prior art, and is preferably a non-high frequency plasma arc cutting machine described in patent application No. 2020202986209, wherein the main board in fig. 5 corresponds to a control board of the non-high frequency plasma arc cutting machine.
Working principle; the mainboard input port inputs voltage from interface CON3, amplify through operational amplifier U3 after voltage filter circuit filters, and isolate voltage signal through linear opto-coupler U2, voltage signal after the isolation of linear opto-coupler U2 passes through 1-3 pin input to CNC voltage detection port through interface CON6 after the enlargies of operational amplifier U4A and operational amplifier U4B again, with the detection mainboard output voltage, and then confirm the concrete state of the output of cutting gun. And then according to the detected result, the main board control switch port controls the gun switch control port through the 4-5 pins of the interfaces CON 7-CON 6 to control the switch of the cutting gun. The interface CON4 can judge whether there is input current detection signal in the reed switch or Hall connected with it; the current detection signal from CON4 is isolated by relay K1, when there is current detection signal, K1 is closed, and then it is connected to the CNC current detection port through interface CON5, so that the CNC starts to walk. The interfaces CON1 and CON2 are connected to the main board to input the voltage to the voltage module, and the voltage is converted and filtered by the power module to supply power to other circuits. The utility model discloses a this control circuit is the circuit on the CNC change-over board in fig. 5 promptly.
The beneficial effects of the utility model reside in that, compare in prior art the utility model discloses in, the voltage signal that the voltage signal spacer in the module is kept apart to outside mainboard input port input to CNC voltage detection port's voltage signal, CNC can detect the voltage signal after the process of input to CNC voltage detection port keeps apart to realize that CNC detects this process of arc pressure of cutting torch, and then the control action of striking an arc. The current detection signal isolating piece of the current detection signal isolating module isolates a current detection signal input to an external CNC current detection port by an external reed pipe so as to realize the process of detecting the current detection signal of the CNC plasma cutting machine and further enable the CNC to control the walking action. The voltage signal isolator and the current detection signal isolator are arranged, so that the CNC can reduce signal interference when detecting voltage signals and current detection signals, and the voltage signals are in safe voltage.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (10)
1. A CNC control circuit of a plasma cutting machine is characterized by comprising a voltage signal isolation module for helping the CNC to detect the arc voltage of a cutting gun, and a current detection signal isolation module for helping the CNC to detect a current detection signal of the plasma cutting machine; the voltage signal isolation module comprises a voltage signal isolator for isolating voltage signals, and the current detection signal isolation module comprises a current detection signal isolator for isolating current detection signals.
2. The CNC control circuit of a plasma cutting machine of claim 1, further comprising an operational amplifier U3 in the voltage signal isolation module, wherein the operational amplifier U3 is connected with the voltage signal isolator, so that the voltage signal enters the voltage signal isolator after passing through the operational amplifier U3.
3. The CNC control circuit of a plasma cutting machine of claim 2, further comprising a voltage filter circuit in the voltage signal isolation module, wherein the voltage filter circuit is connected to the operational amplifier U3, so that the voltage signal after being filtered by the voltage filter circuit enters the operational amplifier U3 and then enters the voltage signal isolation component for isolation.
4. The CNC control circuit of a plasma cutting machine of claim 1, wherein the voltage isolation module further comprises an operational amplifier U4A, and the voltage isolation is connected to the operational amplifier U4A, so that the voltage signal isolated by the voltage isolation enters the operational amplifier U4A.
5. The CNC control circuit of a plasma cutting machine of claim 4, wherein the voltage signal isolation module further comprises an operational amplifier U4B, and the operational amplifier U4B is connected with the operational amplifier U4A.
6. The CNC control circuit of a plasma cutting machine of claim 1, wherein the voltage signal isolator is a linear optocoupler U2; and the model of the linear optocoupler U2 is HCNR 200.
7. The CNC control circuit of a plasma cutting machine of claim 1, wherein the current detection signal isolator is a relay K1.
8. The CNC control circuit of the plasma cutting machine of claim 1, wherein the voltage signal isolation module further comprises a connection circuit for connecting an external motherboard control switch port with a gun switch control port.
9. The CNC control circuit of a plasma cutting machine of claim 1, further comprising a power module powered by an external motherboard, wherein the voltage signal isolation module and the current detection signal isolation module are connected to the power module.
10. The CNC control circuit of plasma cutting machine of claim 9, wherein the power module comprises a rectifier bridge B1, a power filter circuit for filtering, a voltage stabilizer U1, a DC power isolator B2 for isolating voltage signal; the rectifier bridge B1, the power filter circuit, the voltage stabilizer and the direct current power supply isolator B2 are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120400860.XU CN214098207U (en) | 2021-02-23 | 2021-02-23 | CNC control circuit of plasma cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120400860.XU CN214098207U (en) | 2021-02-23 | 2021-02-23 | CNC control circuit of plasma cutting machine |
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| Publication Number | Publication Date |
|---|---|
| CN214098207U true CN214098207U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120400860.XU Active CN214098207U (en) | 2021-02-23 | 2021-02-23 | CNC control circuit of plasma cutting machine |
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| CN (1) | CN214098207U (en) |
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- 2021-02-23 CN CN202120400860.XU patent/CN214098207U/en active Active
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