Numerical control gets sharp grinding machine to expect the orgnaization reachs the design of PLC automatically up and down

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  • source:MOMEYER CNC Machining
As the development of manufacturing industry of numerical control machine tool, our country also had new breakthrough in respect of the grinder that get a tip. A kind of new-style high-powered numerical control gets sharp grinding machine to also be developed to apply subsequently, it is OK and accurate ground blade grinds all sorts of domestic and internationally getting model of broach get a tip. Get needle and the demand that improve manufacturing efficiency to get used to the automation blade of much breed big batch to grind, be necessary to design orgnaization of automatic fluctuation makings on grinder, so that can assemble and unassemble automatically with the broach that carries dimension to differ. At the same time this system still has automatic fixed position to detect, breakdown is diagnosed and warning function, this is implementation of this machine tool large quantities of quantities, fast metre and full automatic the key that turns treatment. One, principle of movement of orgnaization of automatic fluctuation makings considers from the requirement of the user, expect the system is due and flexible up and down. The most crucial question that grinds grinder as the blade that get a tip is automatic fluctuation makings orgnaization should be designed reasonable. Get the structural characteristic of sharp grinding machine according to new-style numerical control, grinder and fluctuation makings orgnaization through Electromechanical fluid unifinication organic ground union rises, make with electronic information the implementation such as clip of oil cylinder, broach, outfit " flexible " requirement, form have system of flexible automatic fluctuation makings. If the fundamental of orgnaization of automatic fluctuation makings that article place analyses pursues 1. 1, the composition of orgnaization of automatic fluctuation makings should expect orgnaization cent is 3 parts automatically up and down: Expect on, send makings, push makings orgnaization. Among them, expect on, send makings orgnaization to belong to automatic feed machanism (if pursue 2) , push makings orgnaization is belonged to with next makings storehouses issue makings orgnaization automatically. Feed machanism: By storage bin, on chamfer of makings oil cylinder, makings, detect switch composition. The bit that needs blade to grind is deposited in storage bin, the base of storage bin and on the push rod of makings oil cylinder is decided through nut lock. Should go up before makings oil cylinder pushs storage bin when, the broach in storage bin falls into makings chamfer. Go up next after makings oil cylinder drives storage bin go back to come, push makings finish. Send makings orgnaization: By send makings oil cylinder, send makings lever, collet, detect switch composition. In sending makings oil cylinder to drive the broach that sends makings lever to will expect groove is medium to carry loose already collet on the head to come quickly above all. Before sending makings oil cylinder to carry its on the head with low speed next, clamp of collet general broach, send makings oil cylinder quick return to hind. Push collet makings oil cylinder finally before coming namely grinding position, send makings finish. Issue makings orgnaization automatically: By push makings oil cylinder, collet clamp oil cylinder, detect switch composition. Blade is ground after ending, push makings oil cylinder to drive collet to retreat after coming. Next clamp oil cylinder loosens collet, send ahead will be placed while makings oil cylinder sends a material already the broach top that blade wears goes out, fall into next makings storehouses in, finish leave makings course automatically. 2, analysis of movement of automatic fluctuation makings is in in going up to expect and leave makings start course, if orgnaization design is unreasonable, can cause go up automatically to expect or fall automatically of makings fluky. The design of storage bin is to go up automatically the key of makings. General V storage bin is easy the circumstance that occurrence card expects, be like graph 3a. Graph 3b storage bin may give the case with now fluky makings likewise. Via studying an analysis, after a makings of makings storehouse the mouth increases the double above to broach diameter, two bit that give makings mouth point can preferred fall into makings chamfer. The 3c that be like a graph storage bin can go out smoothly makings. If blade is ground broach size needs a change, OK adjustment the size of storage bin and the length that send makings lever. To assure to send the accuracy of makings, sent makings oil cylinder to employ a powerful person of magnetism of 3 4 electrify. Hind to in when use send quickly makings, in to before send with low speed makings. The broach in assuring to send material process so won't because spend big career inertial and deflection sends stuff place finally. 3, flow of movement of automatic fluctuation makings should make expect to the ground can be coordinated each other between orgnaization and grinder up and down, continuously, move automatically, become what perfect quite is full automatic numerical control grinder, must control fluctuation makings automation line to go up through PLC all sorts of electric with hydraulic pressure equipment. Before having PLC design and control, the process that analytic grinder expects movement and blade are ground up and down is indispensible. Via analysing its complete automatic fluctuation expects behavioral order is: Oil cylinder of the makings on treatment → pushs → of go back of makings oil cylinder to send makings oil cylinder to send → of go back of makings oil cylinder to carry out horizontal fixed position to detect into → of → collet clamp into → of go back of oil cylinder of the makings on → ending → of program → fixed position pushs makings oil cylinder to carry out blade to grind program → into → , collet loosens → sends makings oil cylinder to enter and bit the top gives → of → collet clamp to be carried out circularly. Such design can make grinder job rhythm compact, also can save whole blade to rub cycle time, and have taller manufacturing efficiency. 2, PLC designs system of makings of as automatic as control fluctuation between each movements coordinating is to pass PLC pilot. Of the buy inside the 8025CNC control system that what this PLC uses is Spanish FAGOR company but controller of process designing logic. It is the interface between CNC and machine tool, loading the information exchange between CNC and machine tool, control machine tool from go up automatically fixed position of makings, level detects, the movement that blade grinds all oil cylinder in leaving makings course automatically reachs all sorts of auxiliary actions carry out. Because this PLC design and process designing are the key of system of this automatic fluctuation makings. 1, design of module of I/O signal processing is in graph 1 in, all inputs arrive of PLC detect signal all passes corresponding immediateness switch is obtained. For mature the safety performance to grinder, be close to switch to maintain low n I=O to input PLC when producing action to perhaps be close to switch to have trouble, the signal that PLC inputs when having effect is tall n I=1. The corresponding position of each oil cylinder parts by detect signal 12-18 input undertakes handling in PLC. Broach grinds fixed position in horizontal blade when, what considering broach fixed position precision and check range finding leave is adjustable quality, the immediateness that installed a high accuracy designedly switch. Detect when executive fixed position when the program, broach is rotational. If high accuracy is close to switch to detect only,19=0 of signal of the input when the groove of broach should detect 19=1 of signal of the input when the first flank of broach, the change that can adopt input signal so uses his to rise the edge will realize exact level to locate. Of the outputs an electric equipment of adopt a young relative to control each oil cylinder electromagnetism a powerful person of PLC connect the opening with other and relevant equipment to stop. 2, the requirement that design of module of function of PLC of automatic fluctuation makings expects according to numerical control grinder and automatic fluctuation and characteristic, automatic fluctuation makings should have a variety of functions. Specific as follows: (Program of initialization of PLC of 1) system initialization wait for M of R of T of all output O, clock, register, label quiet empty place above all 0. Set fundamental condition of the system next, if allow NC program,move, system of the hydraulic pressure that start is waited a moment. (When 2) restoration control stops urgently perhaps after the machine tool that start, can make expect automatic restoration goes to the orgnaization up and down by restoration pushbutton initiative position, and make a machine tool automatic answer 0. (When the bit that 3) hand uses control to should need blade to wear different type perhaps is adjusted to expecting the orgnaization undertakes up and down, can the action of each oil cylinder that the hand moves control to expect up and down will undertake operating debugging. (When 4) automation system is in whack, press treatment bolts, in can making whole machine tool enters process of automatic treatment loop, until press stop to bolt or be encountered stay a case urgently. (5) PLC stops control urgently to should press emergency stop button, oil cylinder appears behavioral breakdown or when the circumstance such as CNC interior occurrence breakdown, all can bring about a system to appear to park position urgently. Right now PLC program can call the police according to what differ what the condition undertakes differring is urgent stop processing, show breakdown information is mixed call the police. (If system of control of lock of 6)PPLC each other is in be not the movement below whack, produce interference likely. The movement that interferes to likelihood happening through PLC undertakes each other locks up control, make its are restricted each other, can prevent attaint facility thereby or produce an accident. Push makings oil cylinder to perhaps go up for example makings oil cylinder is advanced when, send makings oil cylinder to cannot be moved make; Send makings oil cylinder advanced when, push makings oil cylinder and on makings oil cylinder is not active make; Prohibit when be machined automatically the hand moves an operation to wait a moment. Because improved systematic safety performance, reason prevents handlers effectively to press wrong key optional perhaps key-press and cause an accident to happen. 3, the control system that is based on FAGOR company undertakes automatic fluctuation expects PLC software designs this software designing, if its software flow pursues 4. After machine tool electrify, PLC program scans circularly all the time carry out. It gets the outside to be defeated by person signal, mix according to machine tool data all sorts of marks differentiate will realize the auxiliary function such as M, S, decide whether orbit moves or the condition of movement of in proper sequence is satisfied, the hand that finish is moved or the control of voluntary action. Additional, still call the police with what in increase processes of pair of machine tool job, make mistake and handle the screen clew of information. End in restoration when the system hind, can undertake the hand moves an operation to perhaps enter process of automatic treatment loop. At the same time software is in go up automatically makings -- fixed position detects -- treatment -- next makings set clock of a loop in circular process, it uses the time that the record machines circular place to use. In machining a process, if cycle time exceeds the value of set when, the system thinks automatically to expect the movement of the orgnaization has trouble and generation stops urgently up and down call the police. By software flow chart knowable, expect on of oil cylinder on makings movement is in process of first time loop most carry out first, in the following loop it and blade are ground get a needle to reach push makings movement to run paralell carry out, can reduce auxiliary handling time so. 3, epilogue should expect the orgnaization is full automatic automatically up and down the crucial component that numerical control gets sharp grinding machine, what it reached the grinding machine that get a tip through PLC control is full automatic change an end, what realized unmanned operation truly is efficient production. Current, of this orgnaization full automatic numerical control gets sharp grinding machine in Jiangsu some large tool industry already was thrown use, the result shows reliable, function stabilizes its movement. CNC Milling