EDM A

Question 1

What Type of surface finish is the E.D.M Machining process capable of generating?

Accepted Answer

A consistent surface finish, with no discernible 'lay'

Answer

Only a very rough finish

Answer

A surface finish composed of many irregular scratches

Answer

Only a very smooth finish that is unacceptable for any mould cavities

Question 2

What type of clamping pressure is used when holding parts that are to be EDM machined?

Accepted Answer

Light pressure, as the machine operation does not subject the work piece to great pressure

Answer

No clamping equipment required; the EDM process does not put any pressure on the workpiece

Answer

Medium pressure, to counteract the high pressure of the dielectic fluid and the electrode

Answer

Heavy pressure, to ensure that the downward cutting forces exerted by the electrode do not move the workpiece

Question 3

What is the function of dielectic fluid?

Accepted Answer

It acts as an insulator and flushes away eroded particles

Answer

It creates a smooth surface finish by eroding the particles away

Answer

It cools the hydraulic cylinders that control the ram head

Answer

It lubricates the table feed mechanism and cools the work

Perguntas do quiz (3)