The PLC application on bearing grinder

Also, we Introduce The G-code Program Of The Module, the G Code Program Provides High Performance And We Can Use It Easily.

Key word: Code of bearing grinding, servo, G, PLCbearing Grinding Servo Control System G Code PLC1.

Foreword: Wait for the rapid development of the industry as equipment of our country machinery, auto industry, we machine equipment to bearing, especially the bearing grinder demand of high accuracy, efficient, high reliability is very huge. Bearing, the foundation that regards machinist as course of study, the importance that its machine equipment is very outstanding. Current, the bearing of our country machines equipment to machine precision to differ relative to existence, repeat precision the issue with small efficiency of not tall, production, manufacturing bearing and foreign brand have quite big difference. With small-sized ball bearing treatment facilities is exemple, a lot of individual businesses still work in use handiwork production, this explained from flank we control a respect to still a lot of jobs want to do in the automation of equipment. Of course, the machining precision demand of bearing equipment is very high, on this foundation, it is very important to design an excellent automation system to reach its to control software. The author is in the development process of the product line of new-style bearing automation that enlists some group company, the servo that introduces smooth foreign electron controls module, successful design gave a new bearing to grinder controls a system and complete the design of systematic software. Of the value what carry is, smooth ocean (KOYO) the bearing that energy industry is Japan produces one of bibcock businesses, the automation control of its bearing grinding has its original place truly. 2.

Working principle and control ask: With RF-3MZ203 the circle inside small-sized bearing is ground for exemple, the key of its machinery structure depends on grinding feed orgnaization, use linear slideway and assembly of ball guide screw commonly. When treatment, workpiece (bearing ferrule) high speed rotates, emery wheel of control of grinding feed orgnaization moves accurately, undertake grinding is machined. So, the control precision of grinding feed is very important, the complete digitlization that An Chuan uses here communicates servo to control. Sketch map of grinding feed orgnaization is as follows pilot of this grinder automation is overall the requirement is 　 (1) switch measures an input 64 a little bit, switch measures output at 24 o'clock. (2) the communication servo that uses servo to locate module controls An Chuan. As a result of inside treatment of round grinder grinding is measured from time to tome catch online measure, so need forms servo of complete closed circuit to control. Treatment efficiency is tall, requirement servo has good high speed to answer ability; Treatment precision is tall, requirement servo has good tigidity, and excellent low speed performance. Ask servo can achieve good performance in tall, low limit on the whole. Treatment precision achieves 　 of 　 of 1 μ M (3) PLC controls much stage transducer. (4) use interface of feeling type man-machine, the operation is intuitionistic and convenient, the interface is friendly. (5) have capacity of join of PLC bus line, can undertake the net is controlled rectifying the couplet of a product line. 3.

Control systematic hardware design: According to afore-mentioned control requirements, PLC selects the SU series of smooth foreign electron, transducer and communication servo select An Chuan's product, feeling screen chooses the GC-55EM2 of smooth foreign electron, form grinding automation system jointly. Because servo of among them U-01SP odd axis controls module to be able to cooperate goodly with system of communication servo drive,choosing smooth foreign PLC basically is, achieve performance of good tall, low speed, and the coder signal of servo electric machinery feedbacks directly this module, measure those who catch feedback to interrupt control signal to also feedback directly this module, make the closed-loop control on real significance thereby. This module has gotten applied for a long time in industry of smooth modern energy. Communication servo tigidity of An Chuan is good, advanced, quality stabilizes the technology, use at bearing to machine equipment very appropriate; Its transducer has MODBUS bus line, the communication mouth of the module of SU series CPU as a result of smooth foreign electron already inside buy MODBUS agreement, can use communication means to control much stage frequency conversion so, the control of imitate capacity output that uses than former and similar system simplified PLC hardware is configured thereby considerably managing cost. Be worth what carry is SU-5M communication function powerful, CPU oneself has 3 communication opening, use at feeling control of screen communication, transducer communication, bus line respectively, and do not need alone communication module, the sexual price that configures to rising compared with arrived very crucial action. Systematic sketch map is as follows: U-01SP and plan of communication servo layout are as follows: 4.

Control software design: The technology of bearing grinding is very sophisticated, the means of grinding has a variety of. This grinder basically is to pass control to grind worn around motion and orgnaization of emery wheel feed to close suitably, process of the grinding that finish. Pilot point depends on the movement of grinding feed orgnaization, namely the control of servo. The U-01SP in this system can use the G code control of similar CNC, achieve complex program structure thereby. Use this to cover a system, the hand that we realized electric origin moves setting, hand to use the switch that adjusts mode and automatic operation pattern, sheet second move (semi-automatic) all sorts of correction mode with the free switch that runs automatically continuously, emery wheel, and ordinal restoration (by flow of machine tool movement, when be being returned to need, press former already behavioral order turns over directional retrogression to answer initiative condition. Because the each component movement of the machine tool needs to stagger, at the same time restoration can cause collision) . The information of U-01SP and PLC exchanges the input that takes up through this module to output a dot to undertake. Does its correspondence relation see: issueing a list? Silk ribbon ignoranting Piao tastes the program of PLC echelon plan that administers  to tell the main program inside PU of branny Zheng to be a tradition, the process designing of level type language that this program uses smooth ocean, according to technological process the graph is written, the structure is clear, debug convenient; Servo of the download inside U-01SP controls a process, correction program of whole grinding process and emery wheel all is included inside program of G code servo. When PLC main program needs to call servo program, the correspondence that needs to control U-01SP only outputs relay can. If start,move automatically, need only Q N ＋ 2 output is ON; If start a hand to move,invert, q N ＋ 0 3 buy are ON can, ＋ of N of the I when servo moves 2 in showing for ON servo moves (BUSY) . Length of be confined to, detailed technological process picture cannot develop here, the PLC program give typical examples of emery wheel retouch gives out here: G code process designing introduces: Because U-01SP servo locates the G code of kind of CNC of module has process designing convenient, function is powerful, debug intuitionistic, easily a lot of advantages such as study, make simple specification here. (1) jussive of fixed position control is basic format: 　 of N100 G00 X500 F3000 among them N100 is program grade, g00 is command code, x500 represents position position, f3000 shows fixed position rate. (2) code of commonly used G commands a last word: System of respecting CNC numerical control, believing a lot of people is very familiar to G code process designing, but the product of process designing of code of shirt-sleeve in PLC system G does not gain ground in home at present. This our system is in from 2000 home first put into production is apart from already approached 5 years of time today, the user reflects quality stability, use advantage. This system that be worth what carry is us walked out of rotate speed of lowest of servo electric machinery minutely 0.

1 turn the following limit! So low rate grinds the port with be worn principal from time to tome in light, what when be being ground because of light, need is low-down grinding speed, do not have feed grinding condition in order to approach, can achieve extremely tall grinding precision. In fact, system and the special CNC system of 3 water chestnut did the PLC that the user uses us to compare, the measurement of the workpiece after grinding makes clear as a result, the repetition of the grinding precision that uses PLC system, treatment the level that precision reachs special CNC system completely. From this for, this PLC system is having good performance and characteristic: It locates the control of PLC and high-powered servo control is united in wedlock together, those who offerred PLC is easy those who use gender and CNC is high-powered, have very good promotion value and applied perspective. CNC Milling