Multifunctional automatic lathe design based on PLC

Multifunctional automatic lathe design based on PLC van dyke trade ( Shanghai) Co. , LTD. Welcome to visit e hall hall 2 lathe showroom/CNC lathe numerical control lathe, ordinary lathe, vertical lathe, horizontal lathe, turning center,. 。 。 1, introduction: due to the programmable controller ( PLC) Programmability, versatility, strong adaptability, in view of the industrial control design, high reliability, and perfect the ability of fault self-diagnosis and convenient maintenance, so small PLC has the very high cost performance, so the retrofit design of the control circuit of the plain lathe played an extremely important role. 2, electrical control requirements: before feeding, the motor must stop, feeding in place, the seal downward, sealing in place, after feeding to continue until the expected sealing, chuck on spindle clamping tools, material return, and then through the inverter drive main motor at high speed, then according to the functions of selection, feed, workers into, chamfering, finally back in place, complete the processing. Depending on the processing technology, electrical control request as follows: 1) Main motor adopts three-phase asynchronous motor, controlled by inverter, request to quickly stop; And due to the processing speed is fast, frequent start-stop, need to pick up 400 Ω, 260 w braking resistor; 2) The oil pump motor and spindle motor should have the necessary short circuit protection and overload protection; 3) There are three kinds of patterns to choose from, respectively, single cycle, automatic manually. After all the pump and motor, when the clutch is closed single cycle may start and automatic work; 4) Through dial the code switch, there are 10 kinds of function, selection, while she was working in a single cycle and automatic change dial the code switch function is invalid, the need to switch to manual function changes become effective; 5) Need to have a stop button, prevent accidents occurred while starting or running. 3, based on the PLC system design. 3. 1, the hardware design to realize the requirement of the electrical control system of the lathe, choose PLC controller FBS in Taiwan series, model of FBS - 40 mat, I/O points for 40 points, there are 24 input, output 16 points, its I/O wiring diagram is shown in figure 1. PLC I/O input, input distribution table as shown in table 1 and table 2. Table 1 input signal address allocation table 2 output signal distribution table 3. 2, control software design idea is: first, the PLC reads dial the code switch state setting function, and will each function is used by the classification, the main program framework adopts step by step instructions written, in each step according to the function different, call the corresponding subroutine, finish machining process. In accordance with the requirements of system technology, with the lathe process program. And through the field of machine tool for debugging and running, reliable and safe. There are 10 kinds of feature selection, feature list as shown in table 3. Table 3 after duplex feeding features list when dial the code switch display for 0: A cylinder cut first groove, B cylinder after cutting groove. When the dial the code switch display for 1: A flat cylinder line, B cylinder after cutting groove. When dial the code switch display for 2: B cylinder cut first groove, A cylinder after cutting groove. When dial the code switch display for 3: A cylinder head, cylinder B. After the movement and so on.  Feature selection procedure call subroutine 4, the conclusion is based on PLC were to design a multifunctional automatic lathes, running in good condition, which can realize a variety of workpieces, processing each workpiece automatic cycle time is only 4 s, improves the production efficiency and product quality, is a kind of feasible control method. Reference 1. Liu Jinqi. Machine tool electrical automatic control ( Version 2) ( M] 。 Harbin: Harbin industrial university press, 1999. 2. I FBS series PLC programmable controller using manual
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