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Instrumentation and Control (Basic Pneumatics), Exercises of Electronic Measurement and Instrumentation

De La Salle University (DLSU)Electronic Measurement and Instrumentation

Basic Pneumatics Sequence and Programs s dfhbsbsrh seybsrthsyber hsrtn aeybsrt

Typology: Exercises

2019/2020

Uploaded on 07/08/2020

john-virgel-pando
john-virgel-pando 🇵🇭

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Republic of the Philippines
CEBU TECHNOLOGICAL UNIVERSITY
Main Campus
Corner M.J. Cuenco & R. Palma St., Cebu City
Website: http://www.ctu.edu.ph E-mail: [email protected]
Tel. No. (032) 402 4060 local 1135
MECHANICAL ENGINEERING
ME 512 INSTRUMENTATION AND CONTROL ENGINEERING
INSTRUMENTATION LABORATORY
EXERCISES
SUBMITTED BY:
JOHN VIRGEL S. PANDO
BSME 5 – B
SUBMITTED TO:
VAN GAITANO N. VERGARA, ME, MSManE, Ph. D.
INSTRUCTOR
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Republic of the Philippines CEBU TECHNOLOGICAL UNIVERSITY Main Campus Corner M.J. Cuenco & R. Palma St., Cebu City Website: http://www.ctu.edu.ph E-mail: [email protected] Tel. No. (032) 402 4060 local 1135 MECHANICAL ENGINEERING ME 512 INSTRUMENTATION AND CONTROL ENGINEERING INSTRUMENTATION LABORATORY EXERCISES SUBMITTED BY: JOHN VIRGEL S. PANDO BSME 5 – B SUBMITTED TO: VAN GAITANO N. VERGARA, ME, MSManE, Ph. D. INSTRUCTOR

Exercise No. 02 Date: Title: Clamping device Objective:

  1. Familiar with the set-up and mode of operation of a single-acting cylinder and normally closed 3/2 – way valve.
  2. Recognize and sketch the various types of actuation for directional control valves. PROBLEM: A single-acting cylinder of 25mm is to clamp a component when a push button is pressed. The cylinder will remain in the clamped position even if the push button is released. The cylinder will retract when another push button is pressed. Complete the pneumatic circuit diagram for the clamping device in both normal and activated positions and describe the mode of operation of the control system. Given diagram:

Exercise No. 03 Date: Title: Stamping device Objectives:

  1. Familiar with the set-up and mode of operation of a double-acting cylinder and normally closed 5/2 – way solenoid valve.
  2. Recognize and sketch the various types of actuation for directional control valves. PROBLEM: A double-acting cylinder is to stamp an item when a push button is pressed. The cylinder will remain in extended position even if the push button is released. The cylinder will only retract when another or the same push button is pressed. Use an air service unit right after the compressed air supply. Complete the pneumatic circuit diagram for the stamping device in both normal and activated positions and describe the mode of operation of the control system. Given Diagram:

Solution: Pneumatic Circuit Diagram Solution Description: When the 1st^ pushbutton is pressed, the 3/2-way or 5/2-way valve opens and released pressurized air to the double-acting cylinder and it makes the cylinder to extend. After pressing another pushbutton, the 3/2-way valve or 5/2-way valve will back on its original position then retracts the cylinder to its original position.

Solution: Pneumatic Circuit Diagram Solution Description: When the pushbutton is pressed, the single-acting cylinder is extended. When the single-acting cylinder reach its full extension, mechanical switch (1M1) triggers the 5/2-way valve to open and released pressurized air to the double-acting cylinder and make it able to extend. At the same time, the single-acting cylinder retracts and back its normal position and when it happens, 1M triggers the 5/2-way valve to back its original position and makes the double-acting cylinder to retract.

Exercise No. 05 Date: Title: Bending Device Objectives:

  1. Activate the three pneumatic cylinders. PROBLEM: The bending tool is used to bend metal strips and the strip is inserted manually. After pressing the START push button switch, cylinder A clamps the workpiece. Cylinder B bends the part and return to its initial position, and cylinder C completes the bending operation. After cylinder C has returned to the initial position, cylinder A releases the part. Given Diagram:

Solution Description: The 0V1 and 0V2 valve are initially engaged (normally open) so that the air passes through valve switches. When the START pushbutton was pressed, 5/2-way valve (1V) allows pressurized air goes to the piston chamber of Cylinder A (1A) and makes its rod to full extension. Roller switch 1S2 triggers and makes another 5/2-way valve (2V) to open and releases the air into the Cylinder B (2A) to extend. When it switches 2S2 (roller-operated 3/2- way valve), it automatically retracts and hit another roller-operated 3/2-way valve (2S1). When this happen, 3V valve allows pressurized air into piston chamber of the Cylinder C (3A), extend its rod and triggers valve 3S2. After that, it then retracts and hit the roller-operated 3/2-way valve (3S1). The Cylinder A finally retracts and all the components are back to its normal position.