CN105446166A - Machine tool simulation instrument for numerical control system - Google Patents
Machine tool simulation instrument for numerical control system Download PDFInfo
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- CN105446166A CN105446166A CN201511010869.5A CN201511010869A CN105446166A CN 105446166 A CN105446166 A CN 105446166A CN 201511010869 A CN201511010869 A CN 201511010869A CN 105446166 A CN105446166 A CN 105446166A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention discloses a machine tool simulation instrument for a numerical control system, and the instrument comprises a controller, an interface circuit, and a display, wherein interface circuit and the display are correspondingly connected with the controller. The interface circuit comprises a feed signal input interface, a main shaft signal input interface, a simulation coder output interface, a switching quantity input interface, and a switching quantity output interface. The instrument can be in direct butt joint with a main interface on a numerical control device, and enables the numerical control device to be able to operate under the condition of being separated from an electrical control cabinet and a machine tool mechanism through virtualizing operation conditions of the circuit and programs in the instrument and the peripheral equipment of the numerical control device, a servo driver, a main shaft driver, a motor, a transmission mechanism, a limiting switch, and a switching quantity load. The instrument also can visually display the operation conditions of the peripheral circuits of the numerical control device and the machine tool mechanism on a display, thereby facilitating the testing, debugging and fault detection of the numerical control device, and avoiding the debugging and maintenance dangers of a true machine tool.
Description
Technical field
The present invention relates to digital control system debugging and fault diagnosis technology field, be specifically related to a kind of machine tool of numerical control system environmental simulation instrument.
Background technology
Numerical control device will could normal work in a complicated digital control system environment, and the working environment of digital control system comprises numerical control device, electric power system, servo-driver, spindle driver, motor, various sensor and actuator and machine tool motion mechanism.The function of numerical control device performs numerical control parameter, PLC program and machining code, the corresponding control signal of input and output by the computer system of its inside, finally makes lathe produce corresponding motion and embodies.
When adopting numerical control device and peripheral components thereof to form digital control system, should how fast debugging checking numerical control device intrinsic parameter and PLC program correctness, safety builds digital control system, and when digital control system breaks down, how quick position trouble unit, find out failure cause, these are all the major issues in CNC control application.As numerical control device being placed in true peripheral electrical parts and lathe is debugged, once parameter and PLC program make a mistake, electrical equipment and lathe mechanism may being damaged, even security incident will occur.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of numerical control device that can make under virtual peripheral running environment, carries out debugging and fault diagnosis machine tool of numerical control system environmental simulation instrument.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Design a kind of machine tool of numerical control system environmental simulation instrument, comprise controller, and the interface circuit that connect corresponding to described controller and display, described interface circuit comprises feeding signal input interface, main shaft signal input interface, imitative scrambler output interface, switch value input interface and output switch parameter interface;
Described feeding signal input interface is corresponding with the feeding signal output interface of digital control system to be connected, for receiving the speed command that digital control system exports, and to the positional information that digital control system feedback emulating instrument internal virtual machine tool motion produces;
Described main shaft signal input interface is corresponding with the main shaft signal output interface of digital control system to be connected, for receiving the analog voltage instruction of the expression speed of mainshaft that digital control system exports, and to the main spindle's information that digital control system feedback emulating instrument internal virtual main axis produces;
Described controller receives the pulse command that feeding signal input interface is sent into, and by imitative scrambler output interface output motor rotating speed, nut point-to-point speed and position data;
Described controller receives the analog voltage instruction that main shaft signal input interface is sent into, and exports speed of mainshaft data by imitative scrambler output interface;
Described switch value input interface is corresponding with the output switch parameter interface of digital control system to be connected, for receiving the on-off model that digital control system exports; Described output switch parameter interface is corresponding with the switch value input interface of digital control system to be connected, for the on-off model sent to digital control system.
Preferably, described feeding signal input interface is three velocity reversal Puled input interfaces, correspondingly with the X, Y, Z axis velocity reversal pulse output interface of digital control system respectively connects.
Preferably, described imitative scrambler output interface is that orthogonal encoder differential signal output interface is imitated on four tunnels, respectively with the X, Y, Z axis P-pulse input interface of digital control system with main spindle's Puled input interface is corresponding connects.
Preferably, described main shaft signal input interface is analog voltage input interface.
The velocity reversal pulse signal exported according to digital control system and analog voltage signal, the picture of the Virtual Machine motion of the final synthesis of display on the display.
Preferably, described switch value input interface is two, comprise 16 On-off signal points in each switch value input interface, described On-off signal point is corresponding with the output switch parameter interface of digital control system respectively to be connected, for receiving the on-off model that digital control system exports.
Preferably, described output switch parameter interface is two, comprises 16 output switch parameter points in each output switch parameter interface, and described output switch parameter point is corresponding with the switch value input interface of digital control system respectively to be connected, for digital control system transmit button amount signal.
Preferably, described output switch parameter point is relay-type output switch parameter point.
Preferably, described controller is STM32F407VET6 type Cortex-M4 microcontroller.
Preferably, described display comprises the AT070TN92 type liquid crystal display adopting liquid crystal display driving chip SSD1963 to drive.
Preferably, described digital control system is Central China HNC-21M type digital control system.
Beneficial effect of the present invention is:
1. machine tool of numerical control system environmental simulation instrument of the present invention directly can dock with the primary interface on numerical control device, by numerical control device peripheral apparatus operation situations such as the circuit of emulating instrument inside and program virtual servo-driver, spindle driver, motor, gear train, limit switch and switching value loads, auxiliary numerical control plant running; Necessary peripheral circuit and machine tool environment is run by simulation numerical control device, numerical control device is run when departing from electrical control cabinet and lathe mechanism, and intuitively can demonstrate the ruuning situation of numerical control device peripheral circuit and lathe mechanism over the display, conveniently carry out numerical control device test-run a machine, debugging and fault detect, avoid the danger of debugging in true lathe, keeping in repair.
2. machine tool of numerical control system environmental simulation instrument of the present invention can configure the different virtual number of axle, pass on Gong ratio, driving gear, by switching value logics such as programming simulation limit switch, tool magazine, cooling and lubricatings, thus be configured to various dissimilar " Virtual Machine ".Docked with the present invention by numerical control device, the test-run a machine that can carry out an acceptance inspection, just assembling are put, and carry out localization of fault eliminating when there is PLC program mal or parameter error.The present invention is the instrument of a kind of low cost Miniaturized portable application, not only can apply in laboratory environments, also conveniently carry out execute-in-place.
Accompanying drawing explanation
Fig. 1 is the signal wiring graph of a relation of the present invention and digital control system;
Fig. 2 is hardware elementary diagram of the present invention;
Fig. 3 is direction pulse input circuit figure of the present invention;
Fig. 4 is position coder output circuit figure of the present invention;
Fig. 5 is analog voltage input circuit figure of the present invention;
Fig. 6 is processing flow chart of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described, but following examples are only used to describe the present invention in detail, and limit the scope of the invention never in any form.
Embodiment 1: a kind of machine tool of numerical control system environmental simulation instrument, comprises controller, and the interface circuit that connect corresponding to controller and display, wherein, controller is STM32F407VET6 type Cortex-M4 microcontroller; Display comprises the AT070TN92 type liquid crystal display adopting liquid crystal display driving chip SSD1963 to drive.Adopt STM32F407VET6 type Cortex-M4 microcontroller, its integrated multiple hyperchannel timer, each passage all has input capture able to programme and PWM output function, may be used for receiving resolving pulse command, exports imitative orthogonal encoder pulse.On it, integrated ADC can be used for receiving analog voltage instruction.The outside FSMC parallel bus of STM32F407VET6 can carry lcd drive chip SSD1963, plays display effect for driving 7 cun of liquid crystal displays.
Interface circuit comprises feeding signal input interface, main shaft signal input interface, imitative scrambler output interface, switch value input interface and output switch parameter interface.Feeding signal input interface is corresponding with the feeding signal output interface of digital control system to be connected, for receiving the speed command that digital control system exports, and to the positional information that digital control system feedback emulating instrument internal virtual machine tool motion produces.Feeding signal input interface is three velocity reversal Puled input interfaces, correspondingly with the X, Y, Z axis velocity reversal pulse output interface of digital control system respectively connects.
Main shaft signal input interface is corresponding with the main shaft signal output interface of digital control system to be connected, for receiving the analog voltage instruction of the expression speed of mainshaft that digital control system exports, and to the main spindle's information that digital control system feedback emulating instrument internal virtual main axis produces.Imitative scrambler output interface is that orthogonal encoder differential signal output interface is imitated on four tunnels, respectively with the X, Y, Z axis P-pulse input interface of digital control system with main spindle's Puled input interface is corresponding connects.
Controller receives the pulse command that feeding signal input interface is sent into, and by imitative scrambler output interface output motor rotating speed, nut point-to-point speed and position data; Controller receives the analog voltage instruction that main shaft signal input interface is sent into, and exports speed of mainshaft data by imitative scrambler output interface.Switch value input interface is corresponding with the output switch parameter interface of digital control system to be connected, for receiving the on-off model that digital control system exports; Switch value input interface is two, comprises 16 On-off signal points in each switch value input interface, and On-off signal point is corresponding with the output switch parameter interface of digital control system respectively to be connected, for receiving the on-off model that digital control system exports.Output switch parameter interface is corresponding with the switch value input interface of digital control system to be connected, for the on-off model sent to digital control system, output switch parameter interface is two, 16 output switch parameter points are comprised in each output switch parameter interface, output switch parameter point is corresponding with the switch value input interface of digital control system respectively to be connected, for digital control system transmit button amount signal.Output switch parameter point is relay-type output switch parameter point.
Equipment component involved in the embodiment above if no special instructions, is conventional equipment element.
Machine tool of numerical control system environmental simulation instrument of the present invention can by the running status of internal circuit and process simulation numerically-controlled machine X, Y, Z tri-axis servomotor gear trains and a machine tool chief axis gear train, and generate the relative motion between the worktable of similar CNC milling machine and cutter according to the position data that three virtual servo gear trains export, according to the data genaration motion of main shaft that virtual spindle drive exports, the picture of the virtual milling machine motion of final synthesis, display over the display.
Controller receives the pulse command that feeding signal input interface is sent into, and the data such as output motor rotating speed, nut point-to-point speed and position, simulate the servomechanism ruuning situation be made up of pulse command servomotor and one-level screw nut driven mechanism.Wherein the impulse ratio coefficient of pulse command servomotor, the ratio of gear of screw nut driven mechanism, rectilinear motion stroke, mechanical origin position can arrange, thus simulate different numerically-controlled machine servo-operated mechanisms.Controller receives the analog voltage instruction of main shaft signaling interface input, exports speed of mainshaft data, simulates the ruuning situation of the spindle drive be made up of voltage instruction frequency converter, motor and two one pole gear drives switched by shift switch.Wherein frequency converter analog voltage-motor speed scale-up factor, two gear drive ratio of gear can arrange, thus simulate the spindle drive of different numerically-controlled machine.
Be applied to Central China HNC-21M numerical control device for the present invention, its embodiment is as follows: Central China HNC-21M numerical control device mainly contains main shaft interface, servo interface and PLC interface.Main shaft interface, for exporting the control signal of main shaft, receives the feedback signal of main shaft; Servo interface, for exporting the control signal of platen speed (position), receives the feedback signal of the speed of table (position); PLC interface for receiving key amount signal, the various switching value loads controlled on lathe, the enable and alerting signal of such as position excess of stroke signal, driver etc.The control signal that main shaft interface and servo interface export is pulse command and dummy instruction form, the position feed back signal received is ABZ orthogonal encoder differential signal, therefore machine tool of numerical control system environmental simulation instrument of the present invention needs to be connected (see Fig. 1) with Central China HNC-21M digital control system main shaft, servo and PLC interface, can received pulse instruction and dummy instruction Virtual Machine motion, display motion picture, the imitative orthogonal encoder P-pulse of feedback, and PLC input-output device function can be performed.
According to movement position and the default information such as axis servomotor stroke, initial point of numerically-controlled machine X, Y, Z axis servomotor of emulating instrument internal virtual, export related switch amount signal to digital control system.Each axis servomotor has just spacing, negative spacing and initial point three on-off model, totally nine on-off model.The corresponding point of these on-off model in output switch parameter interface are configurable, after ensureing that output switch parameter interface docks with digital control system PLC input interface, these limit switch signal can be inputed on the corresponding PLC function point of digital control system.
The interface circuit of this machine tool of numerical control system environmental simulation instrument comprises three velocity reversal Puled input interfaces, orthogonal encoder differential signal output interface is imitated on four tunnels, an analog voltage input interface (see Fig. 2), and 32 On-off signal points and 32 relay-type output switch parameter points.Emulating instrument three velocity reversal Puled input interfaces connect the X, Y, Z axis velocity reversal pulse output interface of HNC-21M digital control system respectively, namely be connected with three feeding signal output interfaces XS30, XS31, XS32 of HNC-21M digital control system respectively, for receiving the speed command that digital control system exports, and to the positional information that digital control system feedback emulating instrument internal virtual machine tool motion produces.
Orthogonal encoder output interface is imitated respectively with the X, Y, Z axis P-pulse input interface of HNC-21M digital control system with main spindle's Puled input interface is corresponding connects in four tunnels.Wherein main shaft signal input interface is connected with the main shaft signal output XS9 of HNC-21M digital control system, receive the analog voltage instruction of the expression speed of mainshaft that digital control system exports, and to the main spindle's information that digital control system feedback emulating instrument internal virtual main axis produces.
16 On-off signal points are respectively comprised in two switch value input interface, be connected with the PLC output point of HNC-21M digital control system, wherein the order of On-off signal point is identical with digital control system output switch parameter interface XS20, XS21 pin order, directly can be connected with XS20, XS21, receive the on-off model that digital control system exports.Emulating instrument is received main shaft rotating signal, main shaft gear shifting signal, switch liquid coolant signal, switch lubrication signal, Z axis band-type brake signal by switch value input interface, is sent the on-off model such as cutter signal, performs corresponding function and shows over the display.The corresponding point of these on-off model in switch value input interface are configurable, after numerical control device PLC lead-out terminal is connected with emulating instrument switch value input interface, can obtains corresponding numerical control device PLC and output signal.
Respectively comprise 16 output switch parameter points in two output switch parameter interfaces, with the PLC input point of HNC-21M digital control system and suddenly to stop, the excess of stroke removes input point and is connected.Wherein the switch value input interface XS10 of order and the digital control system of output switch parameter point, XS11 pin order are identical, can directly be connected with XS10, XS11, to the on-off model that digital control system sends.
This machine tool of numerical control system environmental simulation instrument adopts STM32F407VET6 type Cortex-M4 microcontroller, group is adopted to create 7 cun of liquid crystal display AT070TN92 as display device, Virtual Numerical Control Milling Machine motion picture, operational factor, data etc. can be shown, and by touch-input function input parameter, programme etc. to input/output switching amount.The resolution of AT070TN92 liquid crystal display is 800*480, and external interface has frame synchronization VS, row synchronous HS, pixel clock PCLK and 24 rgb signal.Adopt liquid crystal display driving chip SSD1963 to drive liquid crystal display, liquid crystal display driving chip comprises MCU parallel interface and liquid crystal drive interface, and built-in 1215K display random access memory.Liquid crystal display driving chip is connected with the external parallel bus FSMC of microcontroller by parallel interface, by 8 position datawire D0 ~ D7 in FSMC, read enable line WE, write enable line OE, address wire A0 and chip select line, by the display data of microcontroller output and stored in display random access memory in sheet, and the display data in display random access memory are passed through VS, HS, PCLK and 24 rgb signals of output simultaneously, image corresponding for display data is presented on liquid crystal display.Can not take cpu resource when showing still image by liquid crystal display driving chip, view data only need output in liquid crystal display driving chip by microcontroller, and the data of liquid crystal display driving chip can pass through frame, line scanning display image on liquid crystal display.The NANDflashHY27UF082G2M of carry 256M byte while of in FSMC bus, for mass data such as picture.7 cun of liquid crystal displays cover four-line resistive touch screen, and touch-screen is connected corresponding control chip ADS7843, ADS7843 and is connected with microcontroller with the GPIO mouth with interrupt function by SPI interface, and microcontroller can be made to read in key information on touch-screen.
The pulse that HNC-21M digital control system exports and direction signal are difference form, differential signal is converted to TTL signal by photoisolator by direction pulse input circuit, wherein the in-phase end of differential signal is connected with the negative electrode of optocoupler, end of oppisite phase is connected with the anode of optocoupler, the optocoupler conducting when inputting negative differential signal, export TTL low level, be connected to the counter input of microcontroller.Velocity pulse input signal adopts high speed photo coupling 6N137 process, and direction pulse input signal adopts common optical coupler EL817 process, see Fig. 3.
Position coder output circuit, see Fig. 4, wherein adopts differential transmitter 75174, uses three transmitting elements wherein, microcontroller is exported analog encoder A, B, Z tri-tunnel single sided pulse be converted to differential signal and export.
Analog voltage input circuit is see Fig. 5, and the differential amplifier be made up of OP07 and reference circuit are formed, and reference source is the 1.25V voltage that TL431 produces, and the output voltage of reference circuit is supplied to the medium voltage that differential amplifier exports as differential amplifier.The enlargement factor of differential amplifier is 0.125, the analog voltage that HNC-21M digital control system can be exported+10V ~-10V is converted to centered by 1.25V, the voltage changed between 2.5V ~ 0V, be input to the ADC input end of microcontroller, the 1.25V reference voltage that reference circuit exports also be input to ADC end simultaneously and calibrate.
The function program of emulating instrument microcontroller is made up of six parallel task programs, is X, Y, Z axis and motion of main shaft exchange program, PLC logic executive routine, emulated interface and numerical value display routine respectively, see Fig. 6.Wherein X, Y, Z axis motion conversion program is driven by respective velocity pulse input capture interrupt respectively, motion of main shaft exchange program is by the ADC drives interrupts of resolving main shaft analog voltage, PLC logic executive routine is performed by timer interruption timing, and emulated interface and numerical value display routine are driven by master routine.X, Y, it is similar that Z three-axis moving turns exchange program, as shown in a part in Fig. 6, triggered by respective shaft velocity pulse capture interrupt and perform, and pulsewidth will be caught be scaled frequency, target velocity is scaled further according to predetermined pulse multiplying power, driving at the virtual motor of supposition---the adequate rigidity of rate feedback system is to overcome cutting force and inertial force ideally, by default ratio of gear and discrete time, converse the displacement increment of worktable, and read direction signal, be added on the position of worktable according to the positive and negative of direction, obtain the reposition of virtual work platform, the position feedback pulse multiplying power outgoing position feedback pulse that basis is default is simultaneously to digital control system main frame, also will add up when direction of motion changes upper default transmission back clearance parameter.Motion of main shaft exchange program is as shown in b part in Fig. 6, change down trigger by Spindle control voltage ADC to perform, target velocity is conversed according to predeterminated voltage rotating speed multiplying power, and equally under the desired motor of supposition drives rigidity situation, converse the speed of mainshaft by default ratio of gear, the main spindle's feedback pulse multiplying power outgoing position feedback pulse that basis is default is simultaneously to digital control system main frame.Switching value handling procedure is as shown in c part in Fig. 6, performed by timer Interruption, processing procedure is similar to general PLC treatment scheme, and first read switch amount input signal and inner input mark, carry out logical operation and upgrade inner output identification and output switch parameter.Such as, when carrying out logical operation, all will read virtual work platform position, if operating position exceedes default table stroke, then the output switch parameter point representing the corresponding axle excess of stroke is closed to be exported at every turn; In the On-off signal point signal such as read in again, which closes for 1 grade, main shaft or 2 grades of signals, just adopts the ratio of gear of which shelves to carry out computing when performing motion of main shaft exchange program.Display refurbishing procedure, as shown in d part in Fig. 6, is performed by main program cycle.Master routine is the first interruption such as initialization input capture, ADC after the reset, and the hardware such as display driver, touch-screen, and then circulation performs read work platform position, with the display of the form of animation over the display, obtains simulated machine tool moving image intuitively.Show the axial positional value of worktable three, velocity amplitude, speed of mainshaft value simultaneously, and main shaft gear, cooling, lubrication, air pressure alarm signal, lifting shaft band-type brake, cutter degree of tightness, the switching value information such as liquid coolant switch, the PLC treatment situation of reflection digital control system main frame directly perceived.
In conjunction with the accompanying drawings and embodiments the present invention is described in detail above, but, person of ordinary skill in the field can understand, under the prerequisite not departing from present inventive concept, each design parameter in above-described embodiment can also be changed, form multiple specific embodiment, be common variation range of the present invention, describe in detail no longer one by one at this.
Claims (10)
1. a machine tool of numerical control system environmental simulation instrument, is characterized in that, comprises controller, and the interface circuit that connect corresponding to described controller and display,
Described interface circuit comprises feeding signal input interface, main shaft signal input interface, imitative scrambler output interface, switch value input interface and output switch parameter interface;
Described feeding signal input interface is corresponding with the feeding signal output interface of digital control system to be connected, for receiving the speed command that digital control system exports, and to the positional information that digital control system feedback emulating instrument internal virtual machine tool motion produces;
Described main shaft signal input interface is corresponding with the main shaft signal output interface of digital control system to be connected, for receiving the analog voltage instruction of the expression speed of mainshaft that digital control system exports, and to the main spindle's information that digital control system feedback emulating instrument internal virtual main axis produces;
Described controller receives the pulse command that feeding signal input interface is sent into, and by imitative scrambler output interface output motor rotating speed, nut point-to-point speed and position data;
Described controller receives the analog voltage instruction that main shaft signal input interface is sent into, and exports speed of mainshaft data by imitative scrambler output interface;
Described switch value input interface is corresponding with the output switch parameter interface of digital control system to be connected, for receiving the on-off model that digital control system exports; Described output switch parameter interface is corresponding with the switch value input interface of digital control system to be connected, for the on-off model sent to digital control system.
2. machine tool of numerical control system environmental simulation instrument according to claim 1, is characterized in that, described feeding signal input interface is three velocity reversal Puled input interfaces, correspondingly with the X, Y, Z axis velocity reversal pulse output interface of digital control system respectively connects.
3. machine tool of numerical control system environmental simulation instrument according to claim 2, it is characterized in that, described imitative scrambler output interface is that orthogonal encoder differential signal output interface is imitated on four tunnels, respectively with the X, Y, Z axis P-pulse input interface of digital control system with main spindle's Puled input interface is corresponding connects.
4. machine tool of numerical control system environmental simulation instrument according to claim 3, is characterized in that, described main shaft signal input interface is analog voltage input interface.
5. machine tool of numerical control system environmental simulation instrument according to claim 1, it is characterized in that, described switch value input interface is two, 16 On-off signal points are comprised in each switch value input interface, described On-off signal point is corresponding with the output switch parameter interface of digital control system respectively to be connected, for receiving the on-off model that digital control system exports.
6. machine tool of numerical control system environmental simulation instrument according to claim 1, it is characterized in that, described output switch parameter interface is two, 16 output switch parameter points are comprised in each output switch parameter interface, described output switch parameter point is corresponding with the switch value input interface of digital control system respectively to be connected, for digital control system transmit button amount signal.
7. machine tool of numerical control system environmental simulation instrument according to claim 6, is characterized in that, described output switch parameter point is relay-type output switch parameter point.
8. machine tool of numerical control system environmental simulation instrument according to claim 1, is characterized in that, described controller is STM32F407VET6 type Cortex-M4 microcontroller.
9. machine tool of numerical control system environmental simulation instrument according to claim 1, is characterized in that, described display comprises the AT070TN92 type liquid crystal display adopting liquid crystal display driving chip SSD1963 to drive.
10. the machine tool of numerical control system environmental simulation instrument according to any one of claim 1-9, is characterized in that, described digital control system is Central China HNC-21M type digital control system.
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| CN111487055A (en) * | 2020-04-29 | 2020-08-04 | 北京金万安汽车电子技术研发有限公司 | Test device for testing characteristics of foot brake valve |
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