Practice of Theory of Mechanics - APS

Stepping Conveyer

Aim

convert many component with same size, 270mm, 120mm boss, height 100mm, 80mm.

• conversion average speed 0.42m/s
• stroke ratio coefficient K=1.7
• destination step size H= 800mm

Design

Part I Component Sperate

use a slide-crank mechanism

Part II Component Convert

use a swing guide mechanism

Calculation

according to the $K=\dfrac{v_2}{v_1}=\dfrac{t_1}{t_2}=\dfrac{\alpha_1}{\alpha_2}=\dfrac{180+\theta}{180-\theta}$

get the $\theta$

set $l_1=250mm, h_1=950mm, l_4=300mm$

get $\alpha=0.4, l_3=1035mm, h_2=631mm$

Speed

Cyclic work diagram