Question

2. A double acting cylinder is continuously punching a hole into a donut by pressing a START pushbutton. The workpiece is detected by a capacitive sensor and cylinder positions are sensed by magnetic reed sensors. The cylinder will extend very fast once a 6bar pressure is detected. The cylinder will go back to its initial position after reaching a fully extended position. Retraction speed is adjustable. Another pushbutton is used to STOP the process that is controlled by a single solenoid valve. Positional Sketch:

design using FLUIDSIM
Please solve as soon as possible
***The solution for PNEUMATICS

Answer 1

3. 6 -0 oIP electric signals Pressure Relief valve filter k tank 0 412 Direction control value 2 solenoid 412 Normally open direction controlvalve s operated In line flow control valve. ① magnetic reed sensor ② Double ceting cylinder ② Capacitive sensor. s

• the compressed air coming from compressor through 4/2 normally open position dcv, flows to the double acting cylinder through the pressure control valve which opens when system pressure reaches at 6 bar.
• the displacement of the piston rod is continuously monitored by magnetic sensors. when fully extended position of cylinder is reached, magnetic sensor sends electric signals to 4/3 dcv. which changes the position from 1 to 3. and retraction starts. the flow is controlled by adjustable flow control valve.
• when retraction of cylinder is completed, magnetic sensor sends another signal to 4/2 dcv. due to that, dcv changes the position to closed position. which acts like stop button.
• silencer or muffler is used to avoid noice of exhaust air.

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