Introduction to Kinematics and Dynamics of Machines in Industrial Engineering Department

This chapter introduces the mechanisms and machines in industrial engineering focusing on the kinematics and dynamics of machines. The concept of slider-crank mechanisms and their inversions are explored, providing applications such as reciprocating engines, rotary engines, and hand pumps. Additionally, the discussion extends to the double slider-crank chain and its inversions, including elliptical trammels. The content delves into the fundamental principles essential for understanding the functioning of various mechanical systems.

• Kinematics
• Dynamics
• Machines
• Industrial Engineering
• Mechanisms

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1. KINEMATICS & DYNAMICS OF MACHINES (KDM) L. E. College, Morbi-2 Industrial Engineering Department Chapter-01 Introduction of Mechanisms and Machines Prepared by Prof. Divyesh B. Patel Mechanical Engg. Dept LE. College, Morbi +919925282644 divyesh21dragon@gmail.com

2. Slider -crank

3. Inversion of slider -crank 1) First inversion This inversion is obtained when link 1 is fixed and links 2 and 4 are made the crank and slider respectively. Applications: a) Reciprocating engine b) Reciprocating compressor

4. Inversion of slider -crank 2) Second inversion Fixing of the link 2 of a slider-crank chain results in the second inversion. Applications: a) Whitworth quick-return mechanism b) Rotary engine

5. Inversion of slider -crank 3) Third Inversion By Fixing of the link 3 of the slider-crank mechanism, the third inversion is obtained. Now the link 2 again acts as a crank and the link 4 oscillates. Applications: a) Oscillating cylinder engine b) Crank and slotted-lever mechanism

6. Inversion of slider -crank 4) Fourth Inversion If the link 4 of the slider-crank mechanism is fixed, the fourth inversion is obtained. Link 3 can oscillates about the fixed pivot B on the link 4. This makes the end A of the link 2 to oscillate about B and the end O to reciprocate along the axis of the fixed link 4. Application: a) Hand Pump

8. Double Slider -crank A kinematic chain which consists of two turning pairs and two sliding pairs is known as double slider crank chain

9. Inversion of double slider -crank 1. Elliptical trammels

12. Inversion of double slider -crank 2.Scotch yoke mechanism

14. Inversion of double slider -crank 3. Oldham s coupling

19. Thank you