Advanced Materials - 230314

Question 1

Parts of a the deep drawing machine

Answer 1

Punch, female die, blankholder. The material is the blank. The process is considered to be deep, when the dept of the punch is greater than the diameter

Question 2

Possible defects of the deep drawing process

Answer 2

Wrinkles 1st order happpen in the exterior part of the blank. Wrinkles 2nd order, in the interior side of the blank.

Question 3

What is an addendum in the deep drawing process?

Answer 3

It is the extra material added to the corners, since small radius and corners cannot properly be manufactured by the process. This creates two outlines, the punch outline and the blank outline.

Question 4

How can you define cutting?

Answer 4

Forming until a fracture occurs.

Question 5

What are the different areas visible in a cutting process?

Answer 5

The roll over (a little rounded part on top of the sheet), the shearing (shear efforts in the sheet), the fracture and the burr (a little extra material on the bottom of the sheet)..

Question 6

What is the effect of decreasing the clearance between the die and the punch?

Answer 6

The smaller the clearance, the smaller the fracture area, and the bigger the shearing.

Question 7

What are the stages of the extrusion process?

Answer 7

Loading, upsetting, extruding and cutting.