cameroon gce A level mechanical design 2
cameroon gce A level mechanical design 2
Aims: To determine the clamping force exerted by the lever 2
Hypotheses and data
-The whole system has as plane of symmetry O, x, y) as indicated in the drawing.
-The weight of pieces is neglected.
-The contact action of link 5-1 is located at points B and C.
-The coefficient of adherence at B and C is f = tg φ = 0.2
-Under the contact action , the rod 5 tends to move toward the left.
-We are at the strict equilibrium.
Data: ;
The links shall be considered as perfect except at points B and C
1- Study of the equilibrium of the rod 5.
1.1 Fill the table bill of external forces.
I.2 Apply the fundamental principle of statics.
I.3 Determine graphically the mechanical actions at B, C and D.
- Study of the equilibrium of the connecting rod 3.
II- 1 write the condition of equilibrium and deduce the line support of the forces and
3 –Study of the equilibrium of the lever 4.
3- 1Fill the table of bill of external forces
3.2 Apply the fundamental principle of statics.
3.3 Determine graphically the mechanical actions at points E and I.
Take .
4- Study of the equilibrium of the operating lever 2.
4-1 – Fill the table bill of external forces.
4- 2- Apply the fundamental principle of statics.
4- 3- Determine graphically the mechanical actions at K and L. Take .
