MISS. HANNA S CLASSROOM RULES

Transcription

1 MISS. HANNA S CLASSROOM RULES 1. My students never fail. I believe in you and so shall you! Miss. Hanna s Quote! 2. Come to class on time. 3. Bring a positive attitude. 4. Come prepared and bring your books and notes. 5. Stay on task. 6. Complete work on time. 7. Pay attention and don t talk while the teacher is talking. 8. Listen carefully. 9. Raise your hand to ask a question. 10.Work quietly. 11.No personal grooming, electronics which will disturb the class and other students who are working. 12.Respect personal space. 13.Ensure chairs and tables are in order before leaving class. 14.Be kind with your words and actions. 15.Respect, obey and follow all school rules and personal property. 16.Work in a safe manner. I appreciate and thank all my students for their effort in respecting and keeping up with our classroom rules!

2 Basic Pneumatic A video 1 for you A video 2 for you A video 3 for you INSTITUTE OF APPLIED TECHNOLOGY 2

3 Think, Pair, Share in class activity Answer the in-class worksheet provided INSTITUTE OF APPLIED TECHNOLOGY 3

4 Basic Pneumatics Module 1: Introduction to Pneumatics (1 week) Module Objectives 1. Define pneumatics and fluid power. 2. Identify the common uses of pneumatic systems. 3. Identify the main advantages of a pneumatic system. 4. Identify the main disadvantages of a pneumatic system. 5. Understand how to construct a pneumatic circuit. 6. Explain the structure and signal flow of a pneumatic system

5 Module Contents 1 Introduction 2 Applications of Pneumatics 3 Advantages and disadvantages 4 Signal flow in Pneumatics 5 Pascal s law 6 Supplementary resources 7 References 8 Worksheet INSTITUTE OF APPLIED TECHNOLOGY 5

6 Introduction to Pneumatics What Does the word Pneumatics Mean? The word Pneumatics comes from the Greek word pneuma, which means 'breath or wind'. It is basically the use of under pressure gas that helps in performing a certain work in science and technology. Definition of pneumatics Pneumatics is the transmission and control of forces and movements by means of compressed air. (The use of compressed air as a medium to do work). What is the fluid power? Fluid power is the energy transmitted and controlled by means of a pressurized fluid, either liquid or gas. The term fluid power applies to both hydraulics and pneumatics. Hydraulics use liquids (oil or water) under pressure while pneumatics use compressed air or other neutral gases. INSTITUTE OF APPLIED TECHNOLOGY 6

7 Applications (Uses) of Pneumatics Car services filling machine A heavy duty pneumatic jackhammer Pharmaceutical Manufacturing: Tablet coating Aeration for oxidation processes (e.g. lactose) Food & Beverage Processing: Filling and capping Fermentation INSTITUTE OF APPLIED TECHNOLOGY 7

8 Other Pneumatic Systems Applications Machining and Industrial processes 1. Drilling 2. Turning 3. Milling 4. Sawing 5. Finishing 6. Forming INSTITUTE OF APPLIED TECHNOLOGY 8

9 Advantages and disadvantages of pneumatics Advantages 1. Air is available everywhere in unlimited quantities. 2. Air can be easily transported in pipelines, even over large distances. 3. Compressed air can easily be stored in a reservoir/tank. 4. Exhaust air is clean. 5. Cost is relatively inexpensive. Disadvantages 1. Compressed air requires good preparation. Dirt and condensates should be removed. 2. Variable speeds. As air is compressible; it is difficult to achieve uniform and constant piston speed. 3. Low Forces compared to Hydraulics. INSTITUTE OF APPLIED TECHNOLOGY 9

10 Structure and signal flow of pneumatic systems Pneumatic systems consist of an interconnection of different groups of elements. These groups of elements form a control path for signal flow, starting from the signal section (input) through to the actuating section (output). Control elements control the actuating elements in accordance with the signals received from the processing elements. INSTITUTE OF APPLIED TECHNOLOGY 10

11 Primary levels of the pneumatic system Actuator: converts energy s compressed air into mechan linear piston is shown. Directional valves: controls pressurized air from the sour port. Check valve (ie of non-retu valve that allows pressurized pneumatic system, but preve of pressure) into the compre stopped. 3/2 Directional Control Valve type) Compressor: a pump which raising it to a higher pressure pneumatic system (sometime to generate a vacuum). INSTITUTE OF APPLIED TECHNOLOGY 11

12 Practical example on pneumatic elements signal flow Drawing on the board INSTITUTE OF APPLIED TECHNOLOGY 12

13 Pascal s Law From the Hydraulics course: The pressure in a confined fluid is transmitted equally to the whole surface of its container Accordingly, the pressure at any point in a body of fluid is the same in any direction as shown to the right. Mathematical formula P = F / A Where: P is the pressure in Pascal (Pa) F is the force in Newton (N) A is the cross sectional area in m2 Notes: 1 bar = Pa 1 Kg force = 10 Newton 1 m2 = cm2 INSTITUTE OF APPLIED TECHNOLOGY 13

14 Example 1 Calculate the Extension force of the pneumatic cylinder shown to the right. Given: Piston area (A) = 0.03 m2 Pressure (P) = 6 bar Solution F = P A F = ( ) 0.03 = N = 1800 Kg INSTITUTE OF APPLIED TECHNOLOGY 14

15 Homework always due at end of each module always due next class HM1 -Worksheet 1 at the end of module 1 HM1 - Worksheet 2 posted on weebly Prepare for Module 2 possible pop quiz on module 2. INSTITUTE OF APPLIED TECHNOLOGY 15

16 Further reading & References For further reading, you can use the following links: Supplementary recourses 1- Pneumatics video from Festo. 2- FluidSIM software. References 1- Festo manuals and workbook TP Festo manuals and textbook TP101 INSTITUTE OF APPLIED TECHNOLOGY 16