CN101446817B - Control system based on PLC for picking, placing, loading and transporting in powder metallurgy production line - Google Patents
Control system based on PLC for picking, placing, loading and transporting in powder metallurgy production line Download PDFInfo
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- CN101446817B CN101446817B CN2008102372747A CN200810237274A CN101446817B CN 101446817 B CN101446817 B CN 101446817B CN 2008102372747 A CN2008102372747 A CN 2008102372747A CN 200810237274 A CN200810237274 A CN 200810237274A CN 101446817 B CN101446817 B CN 101446817B
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Abstract
The invention provides a control system based on PLC for picking, placing, loading and transporting on a production line. A control mechanism controls a working device by executing an internal automatic control program thereof, and the function of automation control on the entire system is achieved by utilizing actions, such as starting and stopping the motor, and opening and closing each cylinder; the working device comprises a mechanical hand, a conveying device and a lifting device; the working device is controlled by PLC, so that the picking and placing of the mechanical hand is finished, and the functions of automatic step control for servoing and loading, brake control for push air pressure, stroke control for conveyor line stepping and asynchronous motor, logical operation and fault protection are achieved; a touch screen is used for monitoring and parameter setting on production field, and the on site operation of man-machine conversation is achieved. PLC is used for performing automatic control on the whole process steps of picking, placing, loading and transporting in powder metallurgy production line, the traditional manual operation mode is changed, the labor power is saved, the labor intensity of working personnel is reduced, and the product manufacture cost is reduced. The system is stable, quick, accurate and reliable.
Description
Technical field
The present invention relates to the technical field of automatic control of powdered metal parts production run, especially relate to a kind of powder metallurgy production line picking, placing, loading transport control system based on programmable logic controller; This invention has changed the mode of production of transmission, and has realized the mode of production of lean from technical equipment.
Background technology
The powder metallurgy production line operation comprises: batching-batch mixing-compacting-sintering-shaping-aftertreatment, promptly the highly purified mixed powder that at first will prepare is loaded in the mould, press forming under certain pressure, then with pressed compact in controlled atmosphere generator, and under the temperature that is lower than the matrix material fusing point, carry out sintering, make and form metallurgical binding between the powder particle.
Traditional metallurgical production mode mostly adopts batch process, and production efficiency is low, labor cost is high.For alleviating a line labor intensity of operating staff, raise labour productivity, the means that are very important of controlling are automatically adopted in its linking between the two in compacting and the sintering production process.Be stable, the reliable and safety of guaranteeing to produce, and reduce control system development difficulty and cost effectively, powder metallurgy production line is controlled the picking, placing, loading mode of movement automatically to be become and needs the problem that solves in the industry, does not have the scheme that relates to based on the powder metallurgy production line picking, placing, loading transport control system of PLC to appear on the market at present as yet.
Summary of the invention
At the prior art above shortcomings, the purpose of this invention is to provide that a kind of control stabilization is good, reliability is high, reduce the powder metallurgy production line picking, placing, loading transport control system based on PLC of hand labor intensity greatly.
The object of the present invention is achieved like this: the powder metallurgy production line picking, placing, loading transport control system based on PLC mainly comprises control gear, touch-screen and equipment; It is characterized in that described control gear is by carrying out its inner automatic control program Control work device, the startup of utilization motor, stop and the open and close of each cylinder moves and finishes robotization control function to total system; Equipment comprises mechanical arm, conveying device and lifting lifting device; Finished by PLC control: mechanical arm picks and places, servo with load stepping control and push air-pressure brake control, pipeline stepping and asynchronous machine Stroke Control, logical operation and failure protection function automatically; Touch-screen is monitored and parameter setting the production scene, realizes interactive execute-in-place.
PLC in the described control gear adopts each 1 of the DVP80EH00T2 type of Taiwan Delta company and DVP14SS type PLC as its control core, and the RS485 interface by autogamy constitutes master-slave mode PLC network and communicates with one another between the two; The major function of PLC is: gather each peripheral signal, comprise each cylinder magnetic switch, each optoelectronic switch of line body, various push-button switch signal; The program that in PLC, weaves in advance, carry out its logical operation, sequential control, regularly, user oriented instruction such as counting and arithmetical operation; Send the in good time Control Driver of high-speed pulse, finish the action of the electronic cylinder of each cylinder and solenoid valve, rotation and stepping, stepper motor and asynchronous machine, and product conveying, the loading that two fully automatic powder make-up machines are suppressed out reached in the full-automatic heating furnace.
Described touch-screen adopts the DOP-B07S200 type color touch screen of Taiwan Delta company as graphic display terminal, is used for production management and production procedure monitoring, and except that system switching, all man-machine works of treatment realize by it.
Described conveying device is made of level Four pipeline and two groups of chutes: the first order, second level pipeline are made up of load-bearing fixed mount, stepper motor, step actuator and PU belt etc., are respectively applied for the conveying of the different demoulding products of two powder formers; Third level pipeline is made up of load-bearing fixed mount, asynchronous machine and speed reduction unit, stainless steel drum and chain, and the boat box of sky or splendid attire different product is carried; Fourth stage pipeline is made up of load-bearing fixed mount, asynchronous machine and speed reduction unit, piece of stainless steel structure belt and chain, is used to carry fill sintered products and empty boat box.
Described lifting lifting device comprises two lifting lifting devices: every lifting lifting device is made up of upper and lower chute, hand basket, straight line cylinder or electronic cylinder etc. respectively, realizes the connection of forward and backward work step by the cylinder kind of drive.
Described equipment comprises three mechanical arms, and control section forms its Full Closed-loop Position type control system by PLC exploitation, with the technological action of realizing mechanical arm and in the conversion and control of each work step.
Compared with prior art, the present invention has following advantage:
What (1) picking, placing, loading transport control system of the present invention had been realized a stream carries out the mode of production punctual, accurate amount on demand.Avoid overstocking of production capital, produced reaction soon, can meet the need of market to greatest extent, improved the quality of product.
(2) picking, placing, loading transport control system of the present invention utilizes picking, placing, loading conveying the carry out automatic control of overall process of PLC to powder metallurgy production line, change its traditional pattern hand-manipulated, not only saved manpower, alleviated the working strength of operating personnel's duplications of labour, and reduced the manufacturing cost of product, improve throughput rate, promoted the automatization level of powder metallurgy production line.
(3) picking, placing, loading transport control system of the present invention has solved the transmission control of heating furnace and powder former, has system stability, quick, accurate and reliable characteristics, has satisfied the requirement of High-efficient Production to the picking, placing, loading transport control system.
Description of drawings
Fig. 1 is a kind of powder metallurgy production line picking, placing, loading transport control system structural representation;
Fig. 2 is the PLC control program structural representation of control system of the present invention;
Fig. 3 is that picking, placing, loading of the present invention is carried the control flow block diagram;
Fig. 4 is system's control main circuit synoptic diagram of control system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
System architecture synoptic diagram of the present invention as shown in Figure 1.This powder metallurgy production line picking, placing, loading transport control system, be that on 20 tons and 100 tons of fully automatic powder make-up machines and full-automatic heating furnace foundation one extends production line, mainly finish: grasp demoulding product from two powder formers respectively, again two kinds of product grouping separated times are carried, grouping products is classified in one of two empty boat boxes being positioned over according to the order of sequence respectively on the same conveying belt afterwards, when loading finish (50 ~ 70 products), whole boat box will be pushed into the heating furnace sintering, product behind the sintering and boat box are skidded off the stove tail automatically, even if on the pipeline that is returned the picking, placing, loading transport control system automatically, when the Sheng of carrying is carried the boat box and is reached the accumulation number of setting, then prompting (optoacoustic warning) operating personnel unloading, product then enters the following process flow process, empty boat box then is placed on the pipeline once more, promptly finish the one action circulation, repeat above flow process again.The unloading of product needed manually behind sintering, all technological actions of total system, the conversion of each station, workpiece moved control, management and detect by PLC and control realization, and operating personnel produce by touch-screen control.
The picking, placing, loading transport control system is the contact tie of heating furnace and powder former, its picking, placing, loading transporting velocity directly influences the rhythm of production of fully automatic powder make-up machine and full-automatic heating furnace, and advanced plant equipment and control method are to guarantee this system stability, prerequisite fast and accurately.
The present invention is based on the powder metallurgy production line picking, placing, loading transport control system of PLC, mainly comprise control gear, touch-screen and equipment, control gear is by carrying out its inner automatic control program Control work device, the startup of utilization motor, stops and the open and close of each cylinder moves and finishes robotization control function to total system; Equipment comprises the belt control line with at least 22 stations of compositions such as mechanical arm, conveying belt and lifting lifting device; Equipment is controlled by PLC, can finish mechanical arm and pick and place, servo control automatically with the loading stepping and the control of propelling movement air-pressure brake, pipeline stepping and asynchronous machine Stroke Control, logical operation and emergency protection functions such as (information detections); Touch-screen is monitored and parameter setting the production scene, realizes interactive execute-in-place.
PLC in the control gear of the present invention adopts each 1 of the DVP80EH00T2 type of Taiwan Delta company and DVP14SS type PLC as its control core, and the RS485 interface by autogamy constitutes master-slave mode PLC network and communicates with one another between the two.The major function of PLC is: gather each peripheral signal, comprise each cylinder magnetic switch, each optoelectronic switch of line body, various push-button switch signal; The program that in PLC, weaves in advance, carry out its logical operation, sequential control, regularly, user oriented instruction such as counting and arithmetical operation; Send the in good time Control Driver of high-speed pulse, finish the action of the electronic cylinder of each cylinder and solenoid valve, rotation and stepping, stepper motor and asynchronous machine, and product conveying, the loading that two fully automatic powder make-up machines are suppressed out reached in the full-automatic heating furnace.
Described touch-screen adopts the DOP-B07S200 type color touch screen of Taiwan Delta company as graphic display terminal, is used for production management and production procedure monitoring, and except that system switching, all man-machine works of treatment realize by it.The major function of touch-screen is: guidance panel is provided and issues production operation order, technological process dynamic monitoring picture; Each ingredient in the system is monitored in real time, in time various parameters, state and the fault alarm in the reactive system operational process; Realize various production data currencys such as system operation time, boat box quantity statistics, finish warning and historgraphic data recording and demonstration to fault, to being presented on the main interface in real time some important physical quantitys such as pipeline traffic direction and speed, manipulator behavior time delay etc., be convenient to the running status that operating personnel in time grasp system, realize operation control system.Under any state, in case system breaks down, all can eject warning window, and send chimes of doom, remind operating personnel to handle.Used touch-screen compatibility is extremely strong in the control system of the present invention, is furnished with three serial communication interfaces of RS-232/422/485 (COM0:RS-232, COM1:RS-422 and COM2:RS-485); By computing machine it is controlled interface, image parameter or curve and carry out off-line editing, and be downloaded to internal memory by the COM0 serial communication interface; In the production line operational process,, obtain the real time data of production line, realize the execute-in-place of person-machine dialogue by COM1 serial communication interface and plc communication; Can also set simultaneously product moving and loading the number of plies and arranging number etc. on 1 grade, 2 grades pipelines easily, to realize the accurate location of each station.
Described conveying device is made of level Four pipeline and two groups of chutes: the first order, second level pipeline are made up of load-bearing fixed mount, stepper motor, step actuator and PU belt etc., are respectively applied for the conveying of the different demoulding products of two powder formers; Third level pipeline is made up of load-bearing fixed mount, asynchronous machine and speed reduction unit, stainless steel drum and chain etc., and the boat box of sky or splendid attire different product is carried; Fourth stage pipeline is made up of load-bearing fixed mount, asynchronous machine and speed reduction unit, piece of stainless steel structure belt and chain, is used to carry fill sintered products and empty boat box.The picking, placing, loading transport control system is finished the transport process of product by the mode of movement of conveying belt, its objective is that product and the boat box with each stage is sent to the destination that will arrive.
Described mechanical arm has comprised three mechanical arms, and wherein the 1# mechanical arm is identical with 2# mechanical arm function, is single-shaft configuration.According to manufacturing technique requirent, adopt servomotor, servo controller and servo-driver, motor encoder, cylinder and solenoid valve, guide rail etc. to be designed to the pinpoint high-performance mechanical hand of high speed of electromechanical servo control; Drive mechanism between the servo and load adopts 5: 1 reductors, and drives the guide rail slide unit by the spin screw mandrel and move, and realizes the location; Can realize moving up and down and 180 degree rotations, be respectively applied for the different demoulding products of two different powder formers of quick extracting; Also can change the paw of different size according to shape of product.The 3# mechanical arm is the two pawl structures of single shaft.According to manufacturing technique requirent, the double control electromagnetic valve of the electronic cylinder of employing stepping, straight line and jaw cylinder and solenoid valve and 2/5 etc. is designed to pneumatic element and drives the low side mechanical arm of doing the point-to-point motion control of low speed, can realize moving up and down and 90 degree rotations, be used to load every row (group) product to be sintered.Be stop time and the arts demand of as far as possible avoiding mechanical arm, two paws that become 90 degree have been installed on the arm; This combination can realize to the extracting respectively of two kinds of grouping products be positioned over two different boat boxes respectively by product category.The control section of three mechanical arms forms its Full Closed-loop Position type control system by the PLC exploitation, and the technological action of realization mechanical arm reaches the conversion and control at each station.
Described lifting lifting device is made up of load-bearing fixed mount, upper and lower chute, hand basket, straight line cylinder or electronic cylinder etc., and two lifting lifting devices are finished respectively and carried the product after the permutation (grouping) on the first order, the second level conveying belt and deliver to clamping position in the 3# mechanical arm.The effect of lifting lifting device is the connection that realizes forward and backward operation by the cylinder kind of drive, and safe and reliable, convenient and swift.
Described software section comprises PLC control program and touch-screen applications software section, it adopts the communication protocol of WPLSoft-(2.08 version) programming software and sequential control ladder diagram programmed method and the trapezoidal instruction of stepping, touch-screen and PLC, and according to picking, placing, loading transport control system manufacturing technique requirent and programming and engineering experience, technology such as appliance computer, machinery, pneumatic, sensor synthetically, have control system interface software flexible, simple to operate, make it can finish the product conveying function well.
Man-machine interface adopts touch screen control system, and be that platform carries out secondary development with supporting Screen Editor 2.00.05 software, reliability height, real-time, full Chinese graphical man-machine interface that the interface is friendly and simple to operate have been realized, and be provided with the operating right of different brackets, the organization and management of being convenient to produce.
The whole procedure structure as shown in Figure 2, its PLC program module is formed: initialization module, primary control program module, initial point debugging module, product select module, manually/adjusting module, move module, equipment fault diagnosis module, fault detection and diagnosis program module and scram module automatically.Modular construction is adopted in the PLC program design, and having can conveniently increase or delete program module, is convenient to carry out perfect advantage at the distinct program module.Described PLC control program is mainly finished: the initialization of systematic parameter; Reading of various detector switches; Reading of voltage, electric current etc.; The control of motor, driver, solenoid valve etc.
Initialization module is finished the initialization process of the various parameters of system, comprises the parameter assignment that some is needed initial value.If parameter has been done modification, then can certainly employ new argument initialization when moving next time; If during printenv, system forbids operation in the system, only after the systematic parameter input, system just can move automatically according to setting value.Slave is detected,, otherwise return the shut down procedure operation if slave connects correctly then downward working procedure.
The membrane keyboard of primary control program module monitors operation picture also realized its function, finishes calling and the processing of switching, various upper limit alarm subroutines and defencive function etc. each subroutine function module.
The initial point debugging module is mainly finished 3 function and soft limiting settings of looking for initial point automatically;
Product selects module by to the reading and judge of product mask register value, and gives the register of appointment with the product parameters of correspondence, makes the product parameters picture of choosing switch to the current picture of product parameters button simultaneously;
Manual regulating module realizes the manual operation of various state of a controls.Be mainly used in system's Installation and Debugging and trouble shooting and work as the product specification (size) of being suppressed the parameter setting of Adjustment System when changing.Under manual mode of operation, the corresponding output of membrane keyboard, simple and clear, easy to operate.
Automatically the operation module realizes the control of operational processs such as various motors.Ordinary production is the real time execution control that core realizes whole picking, placing, loading induction system with automatic operation module, and as required, partially manual membrane keyboard also can use under the operational mode automatically.
But equipment fault diagnosis module failure diagnosis subset fault (circuit and device fault) and operating equipment fault, the action of the corresponding one group of equipment of operational order, whether system has fault according to detected current data judgment device, and all kinds of faults all and guide fault handling method with voice suggestion.
The fault detection and diagnosis program module detects internal circuits such as PLC at any time, in case make a mistake, makes emergency treatment immediately, as: warning, protected data, locking signal output etc.
The scram module is in operational process, and during device fails, equipment is answered instantaneous parking, and flow process should be delayed time in proper order and be quit work after the trouble spot; When the quantity of compacted products had satisfied the demands, promptly last procedure end-of-job can withdraw from automatic operational mode in the Automatic Cycle operational process, finish circulation this time after, circulation stops automatically.
Described touch-screen applications software is under Screen Editor 2.00.05 software environment, control requirement according to system, utilize its text, line, rectangle, data input, data output, designed functions such as dynamic flow diagram, condition monitoring figure, parameter measurement displayed map, parameter trend curve map and alarm logging, report generation, printing respectively.When system power on (PLC and touch-screen get), after its PLC initialization is finished, just enter the primary control program module and scan communication module and realize and the communicating by letter of touch-screen, obtain operation information, again in conjunction with the state of the input contact of PLC, call corresponding functional modules, finish control corresponding operation, real monitoring display when simultaneously related data and parameter state being reached touch-screen and realize by communication module.Systematic parameter occurs when unusual at any time, and PLC can call the interlock protection module, makes system be in the protection holding state, and fault is shown in the operation interface of touch-screen.
Control system is provided with: touch " click enters " membrane keyboard in interface main operation picture, then enter the selection picture, touch corresponding touch function keys again, then enter down one deck corresponding function picture.If touch " M2 parameter setting " key, then enter next and select picture, the product of placing on 1 grade of conveying belt is moved by the time that sets, speed, single and every row (grouping) spacing; If touch " M1 parameter setting " key, then enter another selection picture, can make the 3# mechanical arm by the number of plies that sets, row's number loading stocks.
The control of control system of the present invention mainly comprises: pipeline control and picking, placing, loading are carried control two parts, introduce its control procedure below in detail.
1, pipeline control
The pipeline of picking, placing, loading transport control system is a unidirectional operation, control by PLC, its operational mode has manually, automatically and three kinds of steppings: when " selector switch " on system's switch board panel placed " manually " position, operating personnel are independent on the touch-screen at the scene to carry out start and stop separately to all terminal devices and controls; When " selector switch " places " automatically " position, only need on its panel, to press " system start-up " button, then pipeline will be according to fully automatic powder make-up machine production status and the parameter control program that is preset operation; In order was driven start-up course, the order driving pilot lamp on system's switch board panel started the back flash of light that finishes and transfers zero diopter to the flashing mode alert; In order stopping brake process, the alternately flicker of pilot lamp of opening, stop of the order on system's switch board panel, the back order pilot lamp flash of light of stopping that finishes of stopping transfers zero diopter to, and the order pilot lamp of driving then extinguishes; During startup, also can under manual mode of operation, start each unit earlier respectively, after operation is normal, change device over to automatic operational mode, can also when normal operation, automatic mode be removed, and stop respectively by selector switch.Under the automatic operational mode of device, when the first order or second level pipeline stopped, the subsequent delivery line is automatic stopping immediately just, and sound and light alarm; When the subsequent delivery line breaks down when stopping, all prime pipelines are automatic stopping immediately, and sound and light alarm also shows the progression of fault pipeline; Two entity button of " stepping " knob position correspondence " stepping " and " step moves back " can be carried out the operation of " stepping " and " step moves back " by technology after manual activity is finished, to make things convenient for commissioning device and to adjust the position etc. of each magnetic switch.
2, picking, placing, loading is carried control
Picking, placing, loading is carried the control flow block diagram as shown in Figure 3.Because of 1#, 2# mechanical arm function is identical, this instructions only carries control procedure to describe with regard to 1# mechanical arm region within the jurisdiction to the picking, placing, loading of its system: pass through system's switch board panel button start-up system by operating personnel under the normal condition, by touch-screen parameter is set again, before beginning to carry out user program, system initialization makes the 1# mechanical arm get back to original state and waits for last procedure end-of-job, if workpiece (demoulding product) is arranged on the station of last procedure, be that system detects demoulding signal, just (vertical cylinder should stretch out the 1# mechanical arm from the original position state, horizontal air cylinder should be withdrawn, the jaw cylinder should stretch out and be in releasing orientation) set out, 1# mechanical arm (being driven by the YV1 horizontal air cylinder) is released forward, after shifting stroke onto, the 1# mechanical paw then clamps product and keeps, (by YV3 jaw air cylinder driven), 1# mechanical arm (being driven by the YV1 horizontal air cylinder) is withdrawn backward in the press discharging opening then, this moment, the 1# mechanical paw unclamped product (by YV3 jaw air cylinder driven), product just slides to down one work step position (on 1 grade of conveying belt) from the other tip chute of press discharging opening automatically, this moment, the 1# mechanical arm was got back to initial position, course of action finishes, promptly finish the extracting of a product, place, repeat above-mentioned flow process again; If compacted products is shaped as down little going up greatly, the product that the 1# mechanical arm is grasped then should be positioned over (the big I of crack is regulated according to the size diameter of clamping product) in the clamper earlier, this moment, optoelectronic switch detected signal, just dextrorotation turnback of clamper (being driven by the YV2 rotary cylinder) is positioned over product in the other tip chute of press discharging opening again.
Every product follow procedure stepping on 1 grade of conveying belt moves forward (by the M2 step motor drive), and when the product quantity of being placed during for certain numerical value (one group) of setting, then 1 grade of pipeline is automatically converted to this set product of fast moving; Pipeline is in step run again afterwards, and when product placement quantity was one group again, pipeline was in high-speed cruising again, so repeatedly; (1# lifting lifting device upper hopper chute You Kou limit) puts in place when certain set product moves to, this moment, the B41 electronic type detected signal near switch, the YV4 horizontal air cylinder is just pushed in #1 hand basket (YV5 initial point) in by upper hopper chute this set product and is returned, 1# hand basket decline subsequently (driving) by the YV5 vertical cylinder, run to (1# lifting lifting device gliding groove You Kou limit) at the end, the YV6 horizontal air cylinder is pushed the clamping position (position of YV10) in the 3# mechanical arm with the product in the 1# hand basket by gliding groove and is returned at this moment, YV5 returns initial point simultaneously, promptly finish connecing of a set product, send, repeat above-mentioned flow process again.
The 3# mechanical arm realizes that by YV8 vertical cylinder and the electronic cylinder of M1 stepping the two dimension interlock makes YV10 aim at the center of a set product, the YV9 vertical cylinder makes YV10 to the clamping position, paw clamps a set product (by YV10 jaw air cylinder driven) and moves up (being driven by the YV9 vertical cylinder) afterwards, follow procedure is arranged every set product according to the order of sequence (being driven by M1 stepper motor cylinder) and is positioned in one of two empty boat boxes on 3 grades of conveying belt (when two fully automatic powder make-up machines are worked simultaneously and suppress two kinds of different products) again, 3# mechanical paw (being driven by the YV9 vertical cylinder) unclamps (by YV10 jaw air cylinder driven) again in being displaced downwardly to the boat box subsequently, promptly finish getting of a set product, send, repeat above-mentioned flow process again; When the product of placing when 3# mechanical arm clamping position is 100 tons of press production products, 3# mechanical arm (being driven by YV14 rotary electric cylinder) then dextrorotation turn 90 degrees, make another paw (by YV11 jaw air cylinder driven) come its product of clamping, follow procedure is positioned over it in another boat box again; When the quantity of boat product that box is placed reaches setting value (50 ~ 70), promptly loading finishes; Laden boat box is pushed in the stokehold outdoors and returns by the YV7 horizontal air cylinder by stokehold door chute, and this moment, the B43 electronic type detected signal near switch, then started the 3# pipeline, and next only empty boat box just is placed on above-mentioned loading position, repeats above-mentioned flow process again.
When the boat box of a splendid attire product is finished sintering and skidded off from the stove tail-gate automatically when slipping on 4 grades of conveying belt in the tip chute of stove back door again, this moment, the B34 optoelectronic switch detected signal, the stokehold door is just opened (being driven by the YV20 vertical cylinder) automatically, place stokehold boat box outdoors this moment and be pushed into the heating furnace sintering by YV12 vertical cylinder and the interlock of YV13 rotary cylinder two dimension, the stokehold door is closed (being driven by the YV20 vertical cylinder) subsequently, so repeatedly.
Should be provided with consistent the interval time of 4 grades of pipeline startups with the time of coming out of the stove of each box product of heating furnace, when the boat box quantity that is moved on 4 grades of conveying belt is setting value, then prompting (optoacoustic warning) operating personnel unloading, product then enters follow-up flow process, empty boat box then is placed on 4 grades of conveying belt once more, empty boat box on 4 grades of conveying belt moves to and 3 grades of conveying belt junctions, this moment, the B36 optoelectronic switch detected signal, 3 grades of pipelines just start immediately and move 10 seconds, 4 grades of pipelines are delayed shutdown then, makes an empty boat box finish transmission, and as for 3 grades of conveying belt caudal end, repeat above-mentioned flow process again, empty boat box just becomes line to place on 3 grades of conveying belt successively; When arrive interval time next time, 4 grades of pipelines are activated once more, and so repeatedly, thereby realization picking, placing, loading transport control system is rationally incorporated powder metallurgy production line into, works continuously to finish streamline.
It is the system that the basic demand that system improves adaptive capacity to environment, particularly strong and weak electricity coexist that regular and reasonable electrical equipment wiring is installed, and electromagnetic compatibility and electromagnetic interference (EMI) are very important problems.General supply control realizes master control by the pushbutton switch that has the mechanical self-latching function.When occurring when unexpected, but emergency cut-off general supply and realize protection prevents that mishap from taking place and enlarge; To interference from distribution system, add anti-interference interchange isolating transformer at 220V power supply supply side, make the interference of distribution system reduce to minimum; System's switch board adopts betal can, and the PLC main frame is positioned over this also special-purpose ground wire of design and installation PLC, and stake resistance constitutes screening can, to prevent electromagnetic interference less than 4 Ω; The PLC input point is all utilized the isolation on the small-sized sealing auxiliary reclay realization circuit.The all solenoid valves of system are formed the valve island and are installed in the electrical control cubicles right side, only corresponding tracheae need be drawn to get final product, and electrical control cubicles is an outlet method on the last inlet wire, and each various cable of tracheae are introduced the tank chain by the electrical control cubicles top in the lump, arrives each equipment of system again.
The system terminal actuating equipment mainly contains 2 of ordinary three-phase synchronous, 2 of stepping motors, 1 in the electronic cylinder of stepping, 2 of servomotors, carries out 22 of cylinder solenoid valves; Opertaing device mainly is touch-screen and PLC; External input equipment (device) mainly is the magnetic switch of each cylinder and the optoelectronic switch that motor is carried in control.The control main circuit diagram of control system of the present invention (omits 2 servomotors) as shown in Figure 4 among the figure.
Claims (5)
1. based on the powder metallurgy production line picking, placing, loading transport control system of PLC, mainly comprise control gear, touch-screen and equipment; It is characterized in that, described control gear is by carrying out its inner automatic control program Control work device, the startup of utilization motor, stops and the open and close of each cylinder moves and finishes robotization control function to total system: equipment comprises mechanical arm, conveying device and lifting lifting device; Equipment is controlled by PLC, finishes mechanical arm and picks and places, servo control automatically with the loading stepping and the control of propelling movement air-pressure brake, pipeline stepping and asynchronous machine Stroke Control, logical operation and failure protection function; Touch-screen is monitored and parameter setting the production scene, realizes interactive execute-in-place; Described conveying device is made of level Four pipeline and two groups of chutes: the first order and second level pipeline are made up of load-bearing fixed mount, stepper motor, step actuator and PU belt, be respectively applied for the conveying of the different demoulding products of two powder formers: third level pipeline is made up of load-bearing fixed mount, asynchronous machine and speed reduction unit, stainless steel drum and chain, and the boat box of sky or splendid attire different product is carried; Fourth stage pipeline is made up of load-bearing fixed mount, asynchronous machine and speed reduction unit, piece of stainless steel structure belt and chain, is used to carry fill sintered products and empty boat box.
2. the powder metallurgy production line picking, placing, loading transport control system based on PLC according to claim 1, it is characterized in that, PLC in the described control gear adopts each 1 of the DVP80EH00T2 type of Taiwan Delta company and DVP14SS type PLC as its control core, and the RS485 interface by autogamy constitutes master-slave mode PLC network and communicates with one another between the two; The major function of PLC is: gather each peripheral signal, comprise each cylinder magnetic switch, each optoelectronic switch of line body, various push-button switch signal; The program that in PLC, weaves in advance, carry out its logical operation, sequential control, regularly, the user oriented instruction of counting and arithmetical operation; Send the in good time Control Driver of high-speed pulse, finish the action of the electronic cylinder of each cylinder and solenoid valve, rotation and stepping, stepper motor and asynchronous machine, and product conveying, the loading that two fully automatic powder make-up machines are suppressed out reached in the full-automatic heating furnace.
3. the powder metallurgy production line picking, placing, loading transport control system based on PLC according to claim 1, it is characterized in that, described touch-screen adopts the D0P-B07S200 type color touch screen of Taiwan Delta company as graphic display terminal, be used for production management and production procedure monitoring, except that system switching, all man-machine works of treatment realize by it.
4. the powder metallurgy production line picking, placing, loading transport control system based on PLC according to claim 1, it is characterized in that, described equipment comprises three mechanical arms, constitutes Full Closed-loop Position type control system by PLC, with the technological action of realizing mechanical arm and in the conversion and control of each work step.
5. the powder metallurgy production line picking, placing, loading transport control system based on PLC according to claim 1, it is characterized in that, described lifting lifting device comprises two lifting lifting devices: every lifting lifting device is made up of upper and lower chute, hand basket and straight line cylinder respectively, realizes the connection of forward and backward work step by the cylinder kind of drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102372747A CN101446817B (en) | 2008-12-29 | 2008-12-29 | Control system based on PLC for picking, placing, loading and transporting in powder metallurgy production line |
Applications Claiming Priority (1)
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