PLC and communication servo get the application in milling machine in numerical control
Author: Gu Baoyan

Foreword

There is a model to be the strip aluminium floor sills of Q7 in the product of new development, should above machine 3.7 × of two φ the aperture of flat bottom blind of 1.65, because claimed accuracy is tall, batch is big, reason cannot use traditional jig to be machined on drilling machine, it is very difficult also above traditional milling machine treatment, although can machine efficiency very low also, and equipment loss is mixed power loss is very big also. The treatment of this workpiece is having very extensive representative, a lot of products of production are having similar demand, for this, our design made one is used hereat kind the equipment that the product machines -- general-purpose numerical control gets milling machine.

One, systematic overview

If the graph is shown 1 times,the system is formed, control uses PLC partly, deserve to undertake program parameter revise with man-machine interface, set, and moving condition shows monitoring, but the content of interface of man-machine of process designing setting. 3 axes all communicate servo for total number word, electric machinery of each axis servo is passed even the axis implement drive ball guide screw, deserve in order to move to have the workbench of linear slideway and main shaft milling head, its location is exact, rate is rapid. Main shaft milling head is controlled by transducer, according to cutting tool and workpiece and feed, will set the rotate speed with reasonable main shaft, it is in the program set its start stop. Each axis all is set two-terminal ultimate sensor and origin sensor, cool and lubricate to also have different often detects, calling the police the lamp and man-machine interface place show call the police information. Be debugged to facilitate and overhaul, each operation all sets a hand to use a function, if the hand moves shift of each axis speed, main shaft,high low speed rotates, cutting fluid and lubricant switch. Although whole of this machine tool is half closed-loop control, as long as options, assemble, to program and operation are reasonable, precision and stability still can satisfy use requirement.

Graph 1

2, hardware configuration

PLC is chosen always grand FBS-40MCT, this model machines and tools has higher sexual price to compare, volume is minor, the function is strong, inputted at 24 o'clock, have among them at 16 o'clock high speed tally, frequency can amount to 120K, outputted at 16 o'clock, have 4 axes among them the pace is entered or servo output conformity is inside, output frequency can amount to 120K, make application rises very convenient, wiring forthright. WinProladder of process designing software has echelon graph Great Master say, yi Xueyi is used and the function is powerful, the operation such as editor, surveillant, debug unusual convenient and easy to use, key-press, mouse is used reach function of online and instant instruction inquiry and operation are how-to, make efficiency of editor, input times add.
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