WorksheetsME222
Total questions: 10
Worksheet time: 5mins
0.089 rad
0.89 rad
0.019 rad
0.081 rad
0.26
0.21
0.66
0.46
3. Determine the diameter of blank to produce a shell
of 240 mm diameter and 120 mm height by deep drawing of a 6 mm sheet metal.
415.69 mm
115.69 mm
445.69 mm
419.69 mm
In blanking of a sheet metal of thickness 6 mm, the maximum punch load 450 kN is used with 25% penetration. Determine the work done during shearing.
675 J
575 J
375 J
775 J
1200 J
120 J
1000 J
1800 J
Determine the percentage increase in punching force required in a blanking operation of mild steel sheet if diameter of the blank is increased by 25% and thickness is reduced by 4%.
1.2F1
2.2F1
1.1F1
3.2F1
Determine the diameter of the punch for punching of a metal disk of 76 mm diameter from a 5 mm thick sheet of steel having shear strength 250 MPa.
80 mm
88 mm
180 mm
18 mm
Determine the diameter of the smallest hole that can be punched in a 20 mm thick plate. Ultimate shear strength of material is τ = 150 MPa and allowable crushing stress in the punch is σc = 450 MPa.
30 mm
33 mm
130 mm
35 mm
A 120 mm diameter billet is to be extruded to 75 mm diameter. The working temperature of 700◦C and the extrusion constant is 300 MPa. Calculate the force required for extrusion.
3.12×106N
3.32×106N
1.12×106N
3.12×105N
Calculate the blanking force during punching of 20 mm diameter holes on a 5 mm thick steel sheet. The punch provided a shear of 2 mm and penetration is 30%. Shear strength of the material is 150 N/mm2.
4.712 kN
7.712 kN
4.412 kN
4.112 kN
