The screw-driven screw press is driven by the friction between the friction disc and the flywheel. The components and parameters that the friction press needs to control are as follows:
(1) Control the left and right cylinders to move the slider up and down, and the electromagnet of the brake is released and clamped.
(2) The control of energy is mainly to control the speed V of the slider, and the lifting height of the slider is directly related to the energy of the next striking. The higher the height, the greater the striking energy, so the lifting height is also a control to be controlled. parameter.
The magnetic gantry displacement sensor is used to measure the displacement. The sensor is mainly composed of a fixed magnetic scale and a movable magnetic head. When used, the magnetic scale is fixed on the body, and the slider drives the magnetic head to move, and the measurement occurs by measuring the sensor. The number of pulses is used to measure the magnitude of the displacement.
Since the signal sent by the sensor is small and the waveform is very irregular, it needs to be shaped and amplified before inputting into the single-chip microcomputer, and the software can be used to identify the upper and lower strokes.
In order to meet the needs of energy measurement and control, the MCS-51 single-chip microcomputer was selected and expanded as follows. The RAM (data memory) is a 6116 chip with a capacity of 2K bytes for the storage and use of various valid data in the actual measurement and control process. -PROM (Erasable Program Memory) uses 2764 with a capacity of 8K bytes to store the program. The extension of the interface is 8155. In addition, we make full use of the existing interrupts of the microcontroller to achieve different levels of control.
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