The grinder is a grinder that uses a grinding tool coated or embedded with abrasives to grind the surface of the workpiece. It is mainly used to grind high-precision planes, inner and outer cylindrical surfaces, conical surfaces, spherical surfaces, threaded surfaces and other profiles in workpieces. The main types of grinders are disc grinders, shaft grinders and various special grinders. The grinding machine control system uses PLC as the control core, and the touch screen is the control mode of the man-machine dialogue interface. The man-machine dialogue interface can talk to people about equipment maintenance, operation, failure and other information; the operation interface is intuitive and convenient, program control, and simple operation. All-round safety considerations, misoperations in abnormal conditions are invalid. Real-time monitoring, fault and error alarm, easy maintenance.
Two, the planThe control system mainly adopts the dimensional control man-machine interface LEVI-430T, and the PLC host adopts LX3V-1212MR.
The brief scheme is as follows: Manual mode and automatic mode can be selected through the touch screen. The PLC uses communication to control the frequency of the frequency converter to achieve the speed of the grinding disc. The PLC reads the data of the grating ruler to display the thickness of the abrasive in order to control the PLC action.
Three, a brief introduction to the procedureHMI program:
Automatic picture
When the upper plate is in place and lights up, it can be started.
Click the start button, the spindle and the water spray will act, and light pressure will start the timing action until the light pressure timing ends. The middle pressure starts timing action until the middle pressure timing ends. The heavy pressure starts to act until the end of the heavy pressure timer. When the current value of thickness reaches the set value of thickness, this action ends and the main shaft water pump stops working. And a 1-minute alarm reminder. The automatic action is completed when the alarm is over.
Clicking the stop button during the startup process will end all working states. You cannot switch to the manual screen during startup.
Manual screen
1. Water pump: Click the water pump on button once, the water pump works, and click the water pump off button again to turn off the water pump.
2. Spindle: Click the spindle on button once to start the spindle, and click the spindle off button again to close the spindle.
Here you can set 20 groups of recipes.
Recipe number: select group number, available for selection (1-20)
Each group saves the value of the parameter. Modify the recipe number, you can call the set value. Click Save to write to the PLC.
PLC program:
Sequential control, timing control.
This equipment mainly controls the grinding disc abrasive by the rotating speed of the turntable, and measures the thickness condition of the abrasive according to the grating ruler, as well as the setting of positive pressure and back pressure during the grinding process to control the start and stop of the abrasive.
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