CN207457804U - A kind of operation panel control circuit for numerically-controlled machine tool - Google Patents

Abstract

The utility model discloses a kind of operation panel control circuits for numerically-controlled machine tool, and including external power supply module, PLC and keyboard input module, control circuit further includes：One-chip computer module is electrically connected with external power supply；Decoding module, including decoding address unit and the latch data unit being connected between one-chip computer module and keyboard input module；Communication module stablizes unit and the system interface unit being connected between light-coupled isolation unit and PLC including the light-coupled isolation unit being electrically connected with one-chip computer module, the drop-down being electrically connected with light-coupled isolation unit；The input pattern of original point-to-point panel is converted to the addressing input pattern by scanning corresponding button by decoding module, only need the line of setting decoding address unit and latch data unit, PLC is connected to using address bus and data/address bus, form electrical isolation, it reduces and connects up quantity on numerically-controlled machine tool, reduce the cost and failure rate of numerically-controlled machine tool.

Description

A kind of operation panel control circuit for numerically-controlled machine tool

Technical field

The utility model is related to numerically-controlled machine tool control technology field, more specifically, it relates to which a kind of be used for numerically-controlled machine tool Operation panel control circuit.

Background technology

Numerically-controlled machine tool is the abbreviation of numerically-controlled machine tool, is a kind of automated machine tool equipped with program control system.The control System processed can be handled logically with control coding or other symbolic instruction regulated procedures, and is decoded, with code Digital representation, numerical control device is inputted by information carrier.Various control signals are sent by numerical control device through calculation process, are controlled The action of lathe, shape and size by drawing, automatically processes part.Numerically-controlled machine tool preferably solves multiple Miscellaneous, accurate, small lot, the part processing problems of multi items are a kind of flexible, dynamical automated machine tools, represent existing It is a kind of typical electromechanical integrated product for the developing direction of Machine-Tool Control technology.

Numerically-controlled machine tool of the prior art includes the action actuating mechanism of multiple electric drive and control action executing agency The PLC of action and the control panel for inputting machined parameters, control panel to PLC input datas with control it is multiple action hold Row mechanism, it is therefore desirable between control panel and PLC patchcord be set to be electrically connected the two.

But the PLC on numerically-controlled machine tool uses point-to-point connection mode, control panel with control panel in the prior art On a button correspond to a pin on PLC, button is more, and corresponding pin is also more so that disperses on numerically-controlled machine tool point Many lines are furnished with, not only added the cost of numerically-controlled machine tool but also increase failure rate.

Utility model content

For the PLC on existing numerically-controlled machine tool and control panel using point-to-point connection mode, on control panel One button corresponds to a pin on PLC, and button is more, and corresponding pin is also more so that there is dispersed distribution on numerically-controlled machine tool Many lines, the technical issues of not only having added the cost of numerically-controlled machine tool but also increased failure rate, the utility model provides a kind of use In the operation panel control circuit of numerically-controlled machine tool, have the advantages that wiring quantity is few and concentrates.

To achieve the above object, the utility model provides following technical solution：

A kind of operation panel control circuit for numerically-controlled machine tool, including external power supply module, PLC and key-press input mould Block, the control circuit further include：

One-chip computer module is electrically connected with the external power supply module, for reading the input of keyboard input module letter Number and will the input signal coding after be sent to the PLC；

Decoding module, including be connected between the one-chip computer module and the keyboard input module for allowing the list Piece machine module selectes the decoding address unit of the target button in the keyboard input module, further includes and is connected on the microcontroller Between module and the keyboard input module for the one-chip computer module being allowed to read the state of the target button to read The latch data unit of the input signal；

Communication module, including being used for of being electrically connected with the one-chip computer module the one-chip computer module and the PLC it Between transfer signal and form the light-coupled isolation unit of electrical isolation, be electrically connected with light-coupled isolation unit be used for increase the optocoupler The drop-down of the degree of stability of electric signal on isolated location stablize unit and be connected on the light-coupled isolation unit with it is described The system interface unit for the PLC that transfers between PLC.

Through the above technical solutions, one-chip computer module is converted the input pattern of original point-to-point panel by decoding module For the addressing input pattern by scanning corresponding button, corresponding address is set for each button, so as to only need to set decoding The line of address location and latch data unit, and by the data of input by light-coupled isolation module using address bus with Data/address bus is delivered to PLC, makes to form electrical isolation between microcontroller and PLC, that is, solves the electricity that works between microcontroller and PLC Different problems are pressed, and the quantity connected up between microcontroller and PLC can be reduced, reduces and connects up quantity on numerically-controlled machine tool, reduce The cost and failure rate of numerically-controlled machine tool.

Further, the control circuit further includes to provide the real-time clock mould of uninterrupted clock for one-chip computer module Block, the real-time clock module include the reality for being used to generate real-time clock being connected with the one-chip computer module by iic bus When chip unit, be connected electrically on the iic bus for stablize the iic bus power on signal pull-up stablize unit, Be electrically connected with the real-time chip unit for power supply external power supply unit and be connected on the external power supply unit with The voltage detection unit for being used to detect the operating voltage of the external power supply unit between the one-chip computer module.

Through the above technical solutions, real-time clock module provides a continual clock signal to one-chip computer module, when For numerically-controlled machine tool after client is transported to from manufacturer and before client's arrearage, microcontroller reads clock signal, when numerically-controlled machine tool is run Automatic lock machine after a period of time, lock machine the result is that microcontroller does not handle signal, reach non-serviceable effect, work as customer payment Afterwards, manufacturer sends password to client so as to release the operation of the lock machine of numerically-controlled machine tool.

Further, the voltage detection unit includes resistance R1, resistance R2, resistance R3, resistance R9, capacitance C46, three poles Pipe Q11 and field-effect tube Q10, power supply；

The second pin of the field-effect tube Q10 is electrically connected with the output terminal of the power supply；The field-effect tube Q10 Three-prong be electrically connected with by the resistance R9 with the ADC input pins of the one-chip computer module, the resistance R9 and institute The one end for stating one-chip computer module electrical connection is also electrically connected with the capacitance C46, the other end ground connection of the capacitance C46；

The resistance R1, first pipe are electrically connected between the first pin and the second pin of the field-effect tube Q10 Collector on foot with the triode Q11 is electrically connected, and the base stage of the triode Q11 is electrically connected with the resistance R2, described The other end of resistance R2 is electrically connected with the power supply, and the resistance R3 is in series between the power supply and ground.

Through the above technical solutions, external power supply unit is detected using voltage detection unit, resistance R3 and resistance R3 makes the state that triode Q11 is held on, and the triode Q11 of conducting is by resistance R1 by the first pin of field-effect tube Q10 I.e. gate pole remains low level state, so that field-effect tube Q10 is turned on, when the second pin and external electrical of field-effect tube Q10 When voltage after source unit connection sets voltage value higher than the voltage difference that the first pin reaches, field-effect tube Q10 conductings, microcontroller mould Block measures the voltage of external power supply unit, and when voltage difference is less than setting voltage value, field-effect tube Q10 shut-offs, so as to external electrical Source unit disconnects, and external power supply unit is avoided happening for low-voltage discharge occur, prevents damage external power supply unit.

Further, the control circuit further include be connected with the one-chip computer module signal for showing the PLC Feedback signal display module, the display module include lattice display unit, be connected on the lattice display unit and institute State between one-chip computer module for allowing the dot matrix decoding unit, the string of the one-chip computer module lock onto target light emitting diode It is associated between the lattice display unit and the one-chip computer module and shines two for the one-chip computer module to be allowed to change target The dot matrix latch units of the luminance of pole pipe, its select the numeral method unit that end is electrically connected with the one-chip computer module with And be connected between the numeral method unit and the one-chip computer module for the one-chip computer module to be allowed to change target The digital latch units of the display content of charactron.

Through the above technical solutions, display module, for showing that PLC feeds back to the feedback signal of one-chip computer module, dot matrix is shown Show that unit can show figure and character, and numeral method unit can show character, visualize the operational feedback of numerically-controlled machine tool, Improve usage experience.

Further, the control circuit further includes the alarm mould for alarm being connected with the one-chip computer module signal Block, the buzzer unit for being used to generate audible ringing signal that the alarm module includes being connected with the one-chip computer module signal And the light unit for light warning signal being connected with the one-chip computer module signal.

Through the above technical solutions, after alarm condition occurs in numerically-controlled machine tool, alarm module can send alarm signal, buzzing Device unit beeps sound alarm, and light unit then sends light warning signal, so as to prompt user.

Further, the buzzer unit includes optical coupling isolator U18, resistance R21, resistance R7, resistance R67, resistance The power supply electricity of the first pin of R69, triode Q9 and buzzer U7, the optical coupling isolator U18 and the one-chip computer module Connection, the second pin is connected with the one-chip computer module signal, and three-prong is buzzerphone output terminal, the 4th pin It is electrically connected with the external power supply module；

The emitter of the triode Q9 and the power electric connection of the one-chip computer module, it is electric between emitter and base stage The resistance R7 is connected with, the resistance R67, the other end and the monolithic of the resistance R67 are also electrically connected in base stage Machine module by signal connects, and is electrically connected with the buzzer U7 on the collector of the triode Q9, the buzzer U7's is another End is grounded by the resistance R69.

Through the above technical solutions, buzzer unit while alarm is made a sound also by optical coupling isolator U18 to Outer transmission audible ringing signal, so as to can trigger the other alarm units in periphery or processing unit.

Further, the light unit includes resistance R18 and isolation optocoupler U15, the first pin of isolation optocoupler U15 With the power electric connection of the one-chip computer module, the second pin is connected by the resistance R18 and the one-chip computer module signal It connects, three-prong is light signal output terminal, and is electrically connected with alarm lamp, the 4th pin and the external power supply module Electrical connection.

Through the above technical solutions, light unit is sent out light warning signal by optical coupling isolator U15, so as to Trigger the alarm lamp or processing unit of periphery.

Further, the light unit is arranged to three groups, and the light color of its alarm lamp is different.

Through the above technical solutions, the electrical system on numerically-controlled machine tool is generally using these three colors of red, yellow, and green, it is such Lamp technology maturity is high, easily purchases, is cheap, advantageously reduces the cost of numerically-controlled machine tool.

Further, the one-chip computer module also signal is connected with 485 communication module of isolation for communication with the outside world.

Through the above technical solutions, a kind of important realization interface of the RS485 circuits as Modbus, has been widely used , by the use of one-chip computer module Resources on Chip (UART) as core, then electrical level transferring chip of arranging in pairs or groups can realize that RS485 leads to Believe, be not disturbed generally for ensureing to communicate, and separated power supply with isolating chip.

Compared with prior art, the beneficial effects of the utility model are：

(1) by setting one-chip computer module and the decoding module being electrically connected respectively with one-chip computer module in control circuit With communication module, the input pattern of original point-to-point panel by decoding module is converted to and corresponded to by scanning by one-chip computer module The addressing input pattern of button sets corresponding address for each button, so as to only need to set decoding address unit with latching The line of data cell, and the data of input are delivered to by light-coupled isolation module using address bus and data/address bus PLC makes to form electrical isolation between microcontroller and PLC, solves operating voltage different problems between microcontroller and PLC, again Can reduce the quantity connected up between microcontroller and PLC, reduce and connect up quantity on numerically-controlled machine tool, reduce the cost of numerically-controlled machine tool with Failure rate；

(2) by setting timer clock module in control circuit, real-time clock module provides one to one-chip computer module Continual clock signal, after numerically-controlled machine tool is transporting client to from manufacturer and before client's arrearage, microcontroller reads clock Signal, when numerically-controlled machine tool run a period of time after automatic lock machine, lock machine the result is that microcontroller does not handle signal, reaching cannot make Effect, after customer payment, manufacturer sends password to client so as to release the operation of the lock machine of numerically-controlled machine tool；

(3) by setting voltage detection unit in timer clock module, using voltage detection unit to external power supply list Member is detected, and resistance R2 and resistance R3 makes the state that triode Q11 is held on, and the triode Q11 of conducting passes through resistance R1 The first pin of field-effect tube Q10, that is, gate pole is remained into low level state, so that field-effect tube Q10 is turned on, works as field-effect The second pin of pipe Q10 be connected with external power supply unit after voltage reach higher than the first pin voltage difference setting voltage value when, Field-effect tube Q10 is turned on, and one-chip computer module measures the voltage of external power supply unit, and when voltage difference is less than setting voltage value, field Effect pipe Q10 is turned off, and so as to which external power supply unit disconnects, external power supply unit is avoided happening for low-voltage discharge occur, Prevent damage external power supply unit.

Description of the drawings

Fig. 1 is the block diagram of the utility model operation panel control circuit embodiment；

Fig. 2 is the circuit diagram of the utility model operation panel control circuit embodiment external power supply module；

Fig. 3 is the circuit diagram of the utility model operation panel control circuit embodiment one-chip computer module；

Fig. 4 is the circuit diagram of the utility model operation panel control circuit embodiment decoding module；

Fig. 5 is the circuit diagram of the utility model operation panel control circuit embodiment display module；

Fig. 6 is the circuit diagram of the utility model operation panel control circuit embodiment real-time clock module；

Fig. 7 is the circuit diagram of the utility model operation panel control circuit embodiment communication module；

Fig. 8 is the circuit diagram of the utility model operation panel control circuit embodiment alarm module；

Fig. 9 is the circuit diagram that the utility model operation panel control circuit embodiment isolates 485 communication modules.

Reference numeral：1st, external power supply module；2、PLC；3rd, keyboard input module；4th, one-chip computer module；5th, decoding module； 6th, decoding address unit；7th, latch data unit；8th, communication module；9th, light-coupled isolation unit；10th, pull down and stablize unit；12nd, it is real When clock module；13rd, real-time chip unit；14th, pull up and stablize unit；15th, external power supply unit；16th, voltage detection unit； 17th, display module；19th, dot matrix decoding unit；20th, dot matrix latch units；22nd, digital latch units；23rd, alarm module；24th, bee Ring device unit；25th, light unit；26th, 485 communication modules are isolated.

Specific embodiment

With reference to the accompanying drawings and examples, the utility model is described in detail.

A kind of operation panel control circuit for numerically-controlled machine tool, as shown in Figures 1 and 2, including for entire control circuit External power supply module 1, PLC2 and the keyboard input module 3 of power supply.The input voltage of external power supply module 1 is 24V, it includes will 24V input voltages are converted to the voltage stabilizing chip of 5V voltage outputs and 5V input voltages are converted to the steady of 3.6V voltage outputs Chip is pressed, 24V voltages are powered for PLC2, and 5V powers for display module 17, and 3.6V powers for keyboard input module 3.

As shown in Fig. 2, control circuit further includes the one-chip computer module 4 being electrically connected with external power supply module 1, in order to which simplification is shown Meaning, in attached drawing external power module 1 and the connection of other modules in addition to one-chip computer module 4 omit.As shown in Figure 3 and Figure 4, One-chip computer module 4 is used to read the input signal of keyboard input module 3 and is sent to PLC2 after input signal is encoded.Microcontroller Be in series with decoding module 5 between module 4 and keyboard input module 3, decoding module 5 include making one-chip computer module 4 selected by The decoding address unit 6 of target button in key input module 3.Decoding address unit 6 uses three or eight decoders, three or eight decoders Three input terminals be connected with 4 signal of one-chip computer module, eight output terminals of three or eight decoders and button in keyboard input module 3 Pin electrical connection.Decoding module 5 further includes the latch data list being connected between one-chip computer module 4 and keyboard input module 3 Member 7, latch data unit 7 are used for the state that one-chip computer module 4 is allowed to read target button to read input signal, latch data list Member 7 is electrically connected using latch driver, eight input terminals with the pin of keyboard input module 3, eight output terminals and monolithic The pin electrical connection of machine module 4.Latch driver can also not only increase the input current of one-chip computer module 4 with latch data Capacity, so as to allow one-chip computer module 4 that can support more keyboard input modules 3.

As shown in fig. 7, control circuit is additionally included in the communication module that communication port is formed between one-chip computer module 4 and PLC2 8, communication module 8 includes light-coupled isolation unit 9, unit 10 and system interface unit are stablized in drop-down.Light-coupled isolation unit 9 and list Piece machine module 4 is electrically connected, for transferring signal between one-chip computer module 4 and PLC2 and forming electrical isolation, light-coupled isolation list The light-coupled isolation chip with four road optocouplers can be used in member 9.Drop-down is stablized unit 10 and is electrically connected with light-coupled isolation unit 9, is used for Increase the degree of stability of the electric signal on light-coupled isolation unit 9, pull down stable unit 10 and pull down resistor can be used, pull down resistor One end is electrically connected with the pin of light-coupled isolation unit 9, and the other end is electrically connected with reference ground.System interface unit be connected on optocoupler every From between unit 9 and PLC2, for the PLC2 that transfers, system interface unit is to be connected with row's seat that unit 10 is stablized in drop-down.Monolithic Machine module 4 is converted to the input pattern of original point-to-point panel by decoding module 5 defeated by the addressing of the corresponding button of scanning Enter pattern, corresponding address is set for each button, so as to only need to set decoding address unit 6 and latch data unit 7 Line, and the data of input are delivered to PLC2 by light-coupled isolation module using address bus and data/address bus, make list Electrical isolation is formed between piece machine and PLC2, operating voltage different problems between microcontroller and PLC2 is solved, and can reduce The quantity connected up between microcontroller and PLC2 reduces and connects up quantity on numerically-controlled machine tool, reduces the cost and failure of numerically-controlled machine tool Rate.

As shown in fig. 6, control circuit further includes real-time clock module 12, real-time clock module 12 is used for as one-chip computer module 4 provide uninterrupted clock.Real-time clock module 12 includes the real-time chip unit being connected with one-chip computer module 4 by iic bus 13, real-time chip unit 13 for generating real-time clock, but real-time chip unit 13 this use real-time timepiece chip.Real-time chip Unit 13 is electrically connected by iic bus with the IIC units in one-chip computer module 4, is electrically connected with to stablize IIC on iic bus The pull-up of bus power on signal stablizes unit 14, pulls up and stablizes unit 14 using pull-up resistor, one end of pull-up resistor and 3.6V Power electric connection, the other end are electrically connected with iic bus.Real-time clock module 12 further includes the external power supply unit for power supply 15, button cell can be used in external power supply unit 15, and external power supply unit 15 is electrically connected with real-time chip unit 13, with to real-time Chip carries out uninterrupted power supply.Voltage detection unit 16, voltage inspection are in series between external power supply unit 15 and one-chip computer module 4 Survey the operating voltage that unit 16 is used to detect external power supply unit 15.

Voltage detection unit 16 includes resistance R1, resistance R2, resistance R3, resistance R9, capacitance C46, triode Q11 and field Effect pipe Q10, power supply.P-channel MOSFET can be used in field-effect tube Q10, and NPN type triode can be used in triode Q11. The second pin of effect pipe Q10 is electrically connected with the output terminal of external power supply unit 15.The three-prong of field-effect tube Q10 is with passing through Resistance R9 is electrically connected with the ADC input pins of one-chip computer module 4, and one end that resistance R9 is electrically connected with one-chip computer module 4 is also electrically connected It is connected to capacitance C46, the other end ground connection of capacitance C46.Electricity is electrically connected between the first pin and the second pin of field-effect tube Q10 R1 is hindered, is electrically connected on the first pin with the collector of triode Q11, the base stage of triode Q11 is electrically connected with resistance R2, resistance R2 The other end be electrically connected with power supply, resistance R3 is in series between power supply and ground.It is external using voltage detection unit 16 Portion's power supply unit 15 is detected, and resistance R3 and resistance R3 makes the state that triode Q11 is held on, the triode Q11 of conducting The first pin of field-effect tube Q10, that is, gate pole is remained by low level state by resistance R1, so that field-effect tube Q10 is led Logical, voltage after the second pin of field-effect tube Q10 is connected with external power supply unit 15 is set higher than the voltage difference of the first pin During constant voltage value, field-effect tube Q10 conductings, one-chip computer module 4 measures the voltage of external power supply unit 15, and voltage difference is less than setting During constant voltage value, field-effect tube Q10 shut-offs so as to which external power supply unit 15 disconnects, avoid external power supply unit 15 from low electricity occur The situation of electricity is pressed, prevents damage external power supply unit 15.

Real-time clock module 12 provides a continual clock signal to one-chip computer module 4, when numerically-controlled machine tool is from life Business men is transported to after client and before client's arrearage, and microcontroller reads clock signal, automatic after numerically-controlled machine tool runs a period of time Lock machine, lock machine the result is that microcontroller does not handle signal, reach non-serviceable effect, after customer payment, manufacturer sends Password is operated to client so as to release the lock machine of numerically-controlled machine tool.

As shown in figure 5, control circuit further includes display module 17, display module 17 is connected with 4 signal of one-chip computer module, is used In the feedback signal of display PLC2.Display module 17 includes lattice display unit, the dot matrix decoding unit using 8X8 lattice modules 19 and dot matrix latch units 20.Dot matrix decoding unit 19 is connected between lattice display unit and one-chip computer module 4, for allowing 4 lock onto target light emitting diode of one-chip computer module, dot matrix decoding unit 19 is using three or eight decoder chips being serially connected and lock Driver chip is deposited, three input terminals of three or eight decoder chips are electrically connected with three control pins in one-chip computer module 4, Eight output terminals are electrically connected with eight input terminals of latch driver chip, eight output terminals and dot matrix of latch driver chip The pin electrical connection of display unit.Three or eight decoder chips add the input electricity of one-chip computer module 4 with latch driver chip Current capacity, while enough driving currents can be provided lattice display unit, improve its display brightness, moreover it is possible to reduce display module The demand of 17 pairs of 4 pins of one-chip computer module.Dot matrix latch units 20 for be connected on lattice display unit and one-chip computer module 4 it Between latch driver chip, for allow one-chip computer module 4 change target light emitting diode luminance.Display module 17 is also The numeral method unit that end is electrically connected with the pin of one-chip computer module 4, numeral method unit and microcontroller are selected including it Digital latch units 22 are in series between module 4, such as latch driver chip, digital latch units 22 are for allowing one-chip computer module 4 change the display content of target charactron.Display module 17 is used to show that PLC2 feeds back to the feedback signal of one-chip computer module 4, Lattice display unit can show figure and character, and numeral method unit can show character, make the operational feedback of numerically-controlled machine tool Visualization improves usage experience.

As shown in figure 8, control circuit further includes alarm module 23, alarm module 23 be connected with 4 signal of one-chip computer module with For alarming, alarm module 23 includes the buzzer unit 24 being connected with 4 signal of one-chip computer module and light unit 25.Buzzing For device unit 24 for generating audible ringing signal, light unit 25 is used for light warning signal.Buzzer unit 24 includes optocoupler Isolator U18, resistance R21, resistance R7, resistance R67, resistance R69, triode Q9 and buzzer U7, optical coupling isolator U18's The power electric connection of first pin and one-chip computer module 4, the second pin are connected with 4 signal of one-chip computer module, three-prong For buzzerphone output terminal, the 4th pin is electrically connected with external power supply module 1.The emitter and one-chip computer module of triode Q9 4 power electric connection is electrically connected with resistance R7, resistance R67, resistance is also electrically connected in base stage between emitter and base stage The other end of R67 is connected with 4 signal of one-chip computer module, and buzzer U7, buzzer U7 are electrically connected on the collector of triode Q9 The other end be grounded by resistance R69.Light unit 25 includes resistance R18 and isolation optocoupler U15, and the of isolation optocoupler U15 The power electric connection of one pin and one-chip computer module 4, the second pin are connected by resistance R18 with 4 signal of one-chip computer module, Three-prong is light signal output terminal, and is electrically connected with alarm lamp, and the 4th pin is electrically connected with external power supply module 1. Light unit 25 is arranged to three groups, and the light color of its alarm lamp is different.Electrical system on numerically-controlled machine tool is general Using these three colors of red, yellow, and green, such lamp technology maturity is high, easily purchases, is cheap, advantageously reduces numerical control machine The cost of bed.After alarm condition occurs in numerically-controlled machine tool, alarm module 23 can send alarm signal, and buzzer unit 24 sends bee Ring audible alarm, and light unit 25 then sends light warning signal, so as to prompt user.Buzzer unit 24 is making a sound Audible ringing signal is also sent out by optical coupling isolator U18 while alarm, so as to can trigger the other alarm units in periphery Or processing unit.Light unit 25 is sent out light warning signal by optical coupling isolator U15, so as to can trigger periphery Alarm lamp or processing unit.

As shown in figure 9, one-chip computer module 4, which goes back signal, is connected with 485 communication module 26 of isolation for communication with the outside world. A kind of important realization interface of the RS485 circuits as Modbus, has been widely used, and is provided using the on piece of one-chip computer module 4 Source (UART) is used as core, then electrical level transferring chip of arranging in pairs or groups that can realize that RS485 communicates, and is not done generally for ensureing to communicate It disturbs, and is separated power supply with isolating chip.

For numerically-controlled machine tool the work of operation panel control circuit when, one-chip computer module 4 is by decoding module 5 by original point The addressing input pattern by scanning corresponding button is converted to the input pattern of panel, is set correspondingly for each button The data of input so as to only need to set the line of decoding address unit 6 and latch data unit 7, and are passed through light by location Coupling isolation module is delivered to PLC2 using address bus and data/address bus, makes to form electrical isolation between microcontroller and PLC2, solves It has determined operating voltage different problems between microcontroller and PLC2, has improved the job stability of control circuit, and monolithic can be reduced The quantity connected up between machine and PLC2 reduces and connects up quantity on numerically-controlled machine tool, reduces the cost and failure rate of numerically-controlled machine tool.Its In, real-time clock module 12 provides a continual clock signal to one-chip computer module 4, when numerically-controlled machine tool is transported from manufacturer After toward client and before client's arrearage, microcontroller reads clock signal, automatic lock machine after numerically-controlled machine tool runs a period of time, lock Machine the result is that microcontroller does not handle signal, reach non-serviceable effect, after customer payment, manufacturer sends password to visitor Family operates so as to release the lock machine of numerically-controlled machine tool.

The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to Above-described embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to Go out, for those skilled in the art, several improvement under the premise of the utility model principle is not departed from and Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.

Claims (9)

1. a kind of operation panel control circuit for numerically-controlled machine tool, including external power supply module（1）、PLC（2）With key-press input Module（3）, which is characterized in that the control circuit further includes：

One-chip computer module（4）, it is electrically connected with the external power supply, for reading the keyboard input module（3）Input signal And it is sent to the PLC after the input signal is encoded（2）；

Decoding module（5）, including being connected on the one-chip computer module（4）With the keyboard input module（3）Between for allowing The one-chip computer module（4）Select the keyboard input module（3）In target button decoding address unit（6）, further include It is connected on the one-chip computer module（4）With the keyboard input module（3）Between for allowing the one-chip computer module（4）It reads The state of the target button is to read the latch data unit of the input signal（7）；

Communication module（8）, including with the one-chip computer module（4）Electrical connection is used in the one-chip computer module（4）With it is described PLC（2）Between transfer signal and form the light-coupled isolation unit of electrical isolation（9）And light-coupled isolation unit（9）The use of electrical connection In the increase light-coupled isolation unit（9）On electric signal degree of stability drop-down stablize unit（10）And it is connected on institute State light-coupled isolation unit（9）With the PLC（2）Between for transferring PLC（2）System interface unit.

2. the operation panel control circuit according to claim 1 for numerically-controlled machine tool, which is characterized in that the control electricity Road further includes to be one-chip computer module（4）The real-time clock module of uninterrupted clock is provided（12）, the real-time clock module （12）Including with the one-chip computer module（4）The real-time chip unit for being used to generate real-time clock connected by iic bus （13）, be connected electrically on the iic bus for stablize the iic bus power on signal pull-up stablize unit（14）And The real-time chip unit（13）The external power supply unit for power supply of electrical connection（15）And it is connected on the external power supply Unit（15）With the one-chip computer module（4）Between for detecting the external power supply unit（15）Operating voltage voltage Detection unit（16）.

3. the operation panel control circuit according to claim 2 for numerically-controlled machine tool, which is characterized in that the voltage inspection Survey unit（16）Including resistance R1, resistance R2, resistance R3, resistance R9, capacitance C46, triode Q11 and field-effect tube Q10, supply Power supply；

The second pin of the field-effect tube Q10 is electrically connected with the output terminal of the power supply；The of the field-effect tube Q10 Three-prong is with passing through the resistance R9 and the one-chip computer module（4）ADC input pins electrical connection, the resistance R9 with it is described One-chip computer module（4）One end of electrical connection is also electrically connected with the capacitance C46, the other end ground connection of the capacitance C46；

The resistance R1 is electrically connected between the first pin and the second pin of the field-effect tube Q10, on first pin It is electrically connected with the collector of the triode Q11, the base stage of the triode Q11 is electrically connected with the resistance R2, the resistance The other end of R2 is electrically connected with the power supply, and the resistance R3 is in series between the power supply and ground.

4. the operation panel control circuit according to claim 3 for numerically-controlled machine tool, which is characterized in that the control electricity Road further includes and the one-chip computer module（4）What signal connected is used to show the PLC（2）Feedback signal display module （17）, the display module（17）Including lattice display unit, it is connected on the lattice display unit and the one-chip computer module （4）Between for allowing the one-chip computer module（4）The dot matrix decoding unit of lock onto target light emitting diode（19）, be connected on institute State lattice display unit and the one-chip computer module（4）Between for allowing the one-chip computer module（4）Change the target hair The dot matrix latch units of the luminance of optical diode（20）, its position select end and the one-chip computer module（4）The number of electrical connection Pipe display unit and it is connected on the numeral method unit and the one-chip computer module（4）Between for allowing the monolithic Machine module（4）Change the digital latch units of the display content of target charactron（22）.

5. the operation panel control circuit according to claim 4 for numerically-controlled machine tool, which is characterized in that the control electricity Road further includes and the one-chip computer module（4）The alarm module for alarm of signal connection（23）, the alarm module（23） Including with the one-chip computer module（4）The buzzer unit for being used to generate audible ringing signal of signal connection（24）And with institute State one-chip computer module（4）The light unit for light warning signal of signal connection（25）.

6. the operation panel control circuit according to claim 5 for numerically-controlled machine tool, which is characterized in that the buzzer Unit（24）Including optical coupling isolator U18, resistance R21, resistance R7, resistance R67, resistance R69, triode Q9 and buzzer The first pin of U7, the optical coupling isolator U18 and the one-chip computer module（4）Power electric connection, the second pin and institute State one-chip computer module（4）Signal connects, and three-prong is buzzerphone output terminal, the 4th pin and the external power supply mould Block（1）Electrical connection；

The emitter of the triode Q9 and the one-chip computer module（4）Power electric connection, it is electric between emitter and base stage The resistance R7 is connected with, the resistance R67, the other end and the monolithic of the resistance R67 are also electrically connected in base stage Machine module（4）Signal connects, and is electrically connected with the buzzer U7 on the collector of the triode Q9, the buzzer U7's is another One end is grounded by the resistance R69.

7. the operation panel control circuit according to claim 6 for numerically-controlled machine tool, which is characterized in that the light list Member（25）Including resistance R18 and isolation optocoupler U15, the first pin and the one-chip computer module of isolation optocoupler U15（4）Electricity Source is electrically connected, and the second pin passes through the resistance R18 and the one-chip computer module（4）Signal connects, and three-prong is lamp Light signal output end, and alarm lamp is electrically connected with, the 4th pin and the external power supply module（1）Electrical connection.

8. the operation panel control circuit according to claim 7 for numerically-controlled machine tool, which is characterized in that the light list Member（25）Three groups are arranged to, and the light color of its alarm lamp is different.

9. the operation panel control circuit according to claim 8 for numerically-controlled machine tool, which is characterized in that the microcontroller Module（4）Also signal is connected with 485 communication module of isolation for communication with the outside world（26）.