Extrusion, bending, shearing and deep drawing

Extruded products have a constant cross section...

• Always

• Never

• Most of the times

• Yes, but ony in cold extrusion

Which one is not a type of extrusion process?

• Lateral

• Indirect

• hydrophobic

• direct

The required force for extrusion, doen´t depend on

• Strength of the material

• Extrusion ratio

• Extrusion machine capacity

• speed

What is not a cause of internal cracking in extruded products?

• An increased die angle.

• An increased amount of impurities.

• An increased extrusion ratio.

The main reason why aluminium is used in sheet forming operations, it is because:

• It is very light.

• It has a good formability.

• It is very cheap.

• All of the above.

After shearing AISI 1020 Steel, the hardness of the sheared region is:

• the same

• half the initial hardness

• twice the initial hardness

How can you increase the bendability of a metal?

• Heating it and then decreasing its temperature

• lowering the pressure of the environment.

• Increasing the temperature.

A punch forces a flat sheet-metal blank into a die cavity.

• Extrusion

• Deep drawing

• Shearing

• Bending

Which of these materials has the largest normal anisotropy?

• Zinc alloys

• Stainless Steels

• Titanium alloys

Most manufacturing processes involving sheet formation are carried out at:

• 100 Celsius

• 250 Celsius

• 500 Celsius

• Room temperature