Of circuit of control of radial drilling machine transform

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This paper is system of electric control of tradition of the commonly used Z304016 in studying machining radial drilling machine transform a problem, aim to solve traditional relay, contactor is electric the route that controls systematic existence poor, breakdown diagnoses stability of complex, dependability and the difficult problem such as trouble removal difficulty. Because can make up Cheng controller (PLC of the following abbreviation) electric control system and relay, photograph of electric control system compares contactor, have a structure simple, process designing is convenient, debug cycle weak point, reliability is high, interference rejection capability is strong, fault rate is low, safeguard convenient, low to working environment requirement a series of advantages. Accordingly, this paper is electric to Z304016 radial drilling machine those who control a system transform, will use PLC control technology in transforming program, improved the work efficiency of radial drilling machine greatly. Radial drilling machine applies to sheet or the aperture treatment that batch production contains poriferous large part, it is the machine tool with general machining commonly used workshop. As a result of its original control system uses relay -- contactor controls fashion, circuit wiring is complex, contact is much. After the course is used for a long time, the wiring ageing of each places, cause fault rate tall, breakdown platoon checks difficulty, often affect the normal production of the enterprise. Because PLC has reliability tall, environmental suitability is strong, use convenient, safeguard wait for an advantage simply. Accordingly, use PLC to control circuit to undertake transforming to the relay of radial drilling machine, conduce to the dependability that improves facility, utilization rate. The electric control of 1 Z304016 radial drilling machine (1) use 3 electric machinery to undertake procrastinating moving, advocate electric machinery M1 (4.

0kW) , rocker pine places electric machinery (2.

2 KW) , next electric machinery on rocker (2.

2 KW) , 3 electric machinery all are small-power electric machinery, all use the direct control that start. (2) in dominating circuit, set advocate electric machinery is started / stop, this control did not enter PLC, use directly start and stop pushbutton to have pilot, because any chain are had no to control in this circuit, in need not entering PLC, undertake controlling, already managing I/O dot, reduced breakdown to discharge check the number of again. (3) rocker rises / fall movement according to " rocker is loose, litre / fall, rocker clamp " undertake orderly, by rocker SQ2 of loose journey switch and SQ3 of clamp journey switch are controlled. Before rocker clamp, by time relay KT1 delay time after 1 ～ 3s again clamp. (4) of pillar and main shaft box loosen, clamp can be operated alone, also can undertake at the same time, will control by SB5 of transfer switch SA, loose pushbutton and clamp pushbutton SB6. Use time relay of KT2 cut off the power delay time disconnects the electrify delay time of contact, KT3 closes contact, photograph of implementation electro-magnet YA1, YA2 is sucked ahead of schedule to contactor of hydraulic pump electric machinery close, the control that delay time disconnects. (5) advocate electric machinery M1 and M3 of hydraulic pump electric machinery set hot relay respectively FR1, FR2 makes long-term overload protection. 2 PLC chooses 2.

Check the number of 1 affirmatory I/O retains the control function with original system as far as possible in transform, so that can achieve rocker to get best working result, develop its biggest work efficiency, according to original control circuit is calculated I/O check the number. Among them: Pushbutton 6 (consider managing check the number, two did not enter PLC) , journey switch 4, input check the number actually to be 8 namely; Contactor 5 (consider managing check the number, one did not enter PLC) , auxiliary relay 1, output check the number actually to be 5 namely. 2.

The I/O check the number with certain basis of type of 2 choices PLC, the S7-200 series product that selects production of company of German Xi Menzi. The model of this PLC is CPU222 -- 6ES7 212-1BB23-0B0, input check the number is 8, output check the number is 6, relay is outputted, use power source is 85 to 264VAC (47 to 63Hz) . 3 I/O address allocates reach hookup I/O to allocate a watch to see next tables. I/O allocation expresses the watch on Nextpage basis to design I/O hookup, if pursue 1. Among them the voltage grade of contactor and auxiliary relay undertook adjustment, changed new electric element, voltage grade all is AC220V, voltage grade is unified, facilitate safeguard daily. Programming of 4 PLC of hookup of graph 1 I/O dominates circuit according to original relay, try to analyse improve, but the control function that still keeps original, weave echelon pursues, if pursue 2. Graph 2 echelon pursue a few 5 issues that in transforming, must want to notice (1) when choosing PLC model, want to consider low case, high-powered. (2) original relay dominates circuit more complex, after be like circuit ageing, trouble spot is too much, disadvantageous inquiry, and when using PLC to control, not only raised radial drilling machine greatly the dependability of electric control system and interference rejection ability, and the workload that simplify greatly and reduced maintenance to safeguard, use result is favorable. After 6 last words use PLC to control a system to undertake transforming to radial drilling machine, simplified to control route greatly, safeguard rise very convenient, and the fault rate that lowered equipment to move, raised the stability that equipment runs and utilization rate greatly. Of my factory electric safeguard personnel savor benefit, otherwise mentions maintenance radial drilling machine before, it is a sewage, do not know how to start, since transform after finishing, also did not encounter this kind of problem again, radial drilling machine also had not appeared to affect the situation of condition of production, backwater again. The manufacturer of proposal radial drilling machine, also should change as one used to do design train of thought, after avoiding, similar problem appears in producing a course. CNC Milling CNC Machining