The application of PLC random process designing on the machine tool

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Semi-automatic lathe of 1 foreword much knife used crossed slip, use at machining undercarriage of Buddhist templeput on the brakes of gear semifinished product, car, flange dish wait for a spare parts. The dimension as a result of these spare partses and appearance each different, and treatment batch is big, accordingly, requirement machine tool has the characteristic of versatility and special sex at the same time. Ever had used plug board before, use diode matrix circuit to realize programme controll, but because circuit is easy occurrence contact is undesirable, cause a machine tool to often produce misoperation. Instead PLC is controlled later, the combination that passes switch will choose a few kinds of programs to undertake machining, but the program of the choice is finite after all. When the program cannot satisfy the requirement that processes work, use pair of echelon graphs to undertake modification asking in order to satisfy treatment normally, but did an user to bring a lot of inconvenience so. To overcome this one weakness, we used technology of PLC random process designing, carry out a proof, this technology has fundamental applied value. Random process designing of PLC of 2 jobs principle is to be below the premise that does not amend echelon plan, use I/O to input signal, write or modify the machine program of the machine tool, make the machine tool moves by the machine program after write or be being revised. Technology of PLC random process designing already applied to much knife semi-automatic lathe, chooses PLC is Fuji NB series can make up Cheng controller. A lot of application statements were used in echelon graph, in the editor condition falls, the machine program of the machine tool cent pace stocks memory D. When move, the information v in memory D, deliver output address Y, go through outputting signal Y the coil of incentive relay, contactor, electro-magnet, make the machine tool moves by the machine program that has edited. Flow chart sees a picture 1. Graph cent of graph of echelon of 1 flow chart is 3 parts: Machine program retrieves with what cancel the editor of knife program, order and move automatically, the hand is moved adjust. Definition treatment movement mixes machine program and the input signal that retreat the editor of knife program to use I/O the movement that retreat a knife, convey the movement of every pace register M and MA, convey the information in register M and MA again Dn of memory D1 ～ and DA1 ～ DAn. Dn of memory D1 ～ and DA1 ～ DAn choose report to maintain register, lose in order to avoid program of the user after the machine tool drops report. D1 ～ Dn and DA1 ～ DAn store lay aside information for the unit with the word. The signal processing technique that echelon pursues medium (2) seeing a picture is as follows: The method retreating a knife that when 2 machine tools are processing different work, the graph asks is different, its cent plants: One kind is former road retreats a knife, another kind is synthesis retreats a knife. Former road retreats a knife to need to edit the program that retreat a knife, synthesis retreats a knife not to need. Whether is there news in judging DAn of memory DA1 ～ automatically by PLC, if have, carry out former road to retreat a knife, by the editing process that retreat a knife former road is returned; If do not have, carry out synthesis to retreat a knife. The processing technique that its echelon pursues and processing machine program are similar. The retrieval of the editor that retrieve and runs a program automatically is the movement that shows a machine tool through indicator light, in order to checks the validity of writes program. Moving automatically is to make the machine tool presses an editorial machine program to move, their principle is identical. The processing technique that pursues medium in echelon is: Above all, judgement is external the place in inputting condition and program is editorial the condition is equal. If unequal, continue to judge, the program is not carried out downward; If equal, convey the information of Dn of memory D1 ～ register M. Next, detect whether to have urgent return signal, if have,suspend machine program, call the program that retreat a knife; If do not have,pass the information in register M I/O to output address Y, go by Y the coil of incentive electro-magnet, auxiliary relay, contactor, make the machine tool moves by editing process (3) seeing a picture. Graph 3 when occurrence breakdown or emergency, operation personnel input is urgent return signal, PLC suspends machine program immediately, call the program that retreat a knife. The processing technique that echelon pursues and afore-mentioned likeness. The information of the machine tool can be put in for the unit with the word put store implement in, OK also the formal set with constant. External the input signal that information is relay of journey switch, pressure, work station, can put in for the unit with the word put store implement in. For farther specification, here chooses constant of in order to to be an unit, citing is as follows: The information that establishs a machine tool is: External information is: Carry the operation that afore-mentioned echelon pursue medium, the information in MB and exterior information are same. Convey the information of the machine tool at this moment M, output address Y by M control again. When the information of the machine tool produces change, output signal Y also is changed subsequently, realized random process designing so. 3 characteristics the echelon graph of random process designing and average echelon figure differ somewhat, the machine program that uses machine tool of random process designing is not pursue editorial by echelon, the input signal that carries PLC by the control component on control panel however edits the circular movement of the machine tool, make the machine tool undertakes moving by editorial loop movement. The process designing that it need not use PLC implement, aleatoric ground edits and revise the treatment act of the machine tool, machine all sorts of different spare partses in order to suit. Because used PLC control, make the interference rejection ability of electric part increases, make of the machine tool move reliable, what added equipment consequently is flexible, improved the use efficiency of equipment. Technology of this PLC random process designing already used 4 last words to much knife semi-automatic lathe. Solved matrix circuit of plug board diode to contact bad problem, can edit an all sorts of machine program that user place wants conveniently. Technology of random process designing still can be used at using PLC pilot modular machine tool to go up, the machine program of every modular machine tool is different, want to devise echelon plan to every machine tool in designing a process. But, if use technology of PLC random process designing, the PLC to same type can write a current echelon plan, can realize all sorts of treatment requirements. Can save a lot of time not only so, and still can improve manufacturing efficiency. Carry out a proof, aborning of technology of PLC random process designing has fundamental applied value. CNC Milling CNC Machining