metal wasting processes

Question 1

milling

Answer 1

work is clamped onto the table of machine
table runs in x, y and z direction to cut slots, shape edges and thread holes

Question 2

turning

Answer 2

on centre lathe
wok held on rotating chuck
machined to reduce diameter
manually or CNC
uses cutting tools held in a tool post
moves in and out along the bar

Question 3

flame cutting

Answer 3

uses oxy-aceylene gas and special flame cutting torch
intense flame
cuts low carbon and alloy steel plate
additional jet of oxygen to intensify the flame
no need for electricity
difficult to maintain parallel line

Question 4

plasma cutting

Answer 4

heated ionised gas electrically conductive
transfer energy from power supply to material
28,000 degrees
quickly burns through material which blows away
fast and clean cut

Question 5

laser cutting

Answer 5

industry for precision
uses power from high power laser directed through optics
laser head contains lens
cuts and engraves
fine tolerance, accurate, less energy
only works on thinner pieces

Question 6

punching / stamping

Answer 6

computer controlled stamp out sections of the sheet
uses shearing action on a sheet of metal placed between upper tool (punch) and lower tool (die)
small and medium sized production
0.5-0.6mm thickness