PROBLEM $1\mathrm{.}60$ pts

The End Connector $($Fig$.1)$ is machined on a CNC system using carbide

tools.

Turning: $100$ft$//$min cutting speed, feed $0\mathrm{.}010$ inch $/$rev

Milling: $80$ft$//$min cutting speed, chip load $0\mathrm{.}004$ inch $/$tooth

a$)$ Find the recommended cutting speed and feed rate for turning the

large diamter $($ O$/5$ inch rod, $0\mathrm{.}05$ inch depth of cut$).$

b$)$ Complete the CNC block: N$100$ G$20$ S

F

M$03$

c$)$ Find the recommended cutting speed and feed rate for milling the $10$ x

$4$ inch flat surfaces using O$/2$ inch tool with $4$ carbide inserts $($teeth$),$

$0\mathrm{.}05$ inch depth of cut.

d$)$ Complete the CNC block: N$200$ G$20$ S

F

M$03$

Fig. $1$: End connector. Unit: inch. Material:

H $13$ steel

PROBLEM $2.40$ pts

Tooling for problem $1$ above:

Milling insert has $3^($@$)$ concavity angle.

Turning insert has $0\mathrm{.}15$ mm nose radius

Calculate the expected surface finish Ra $($micro inch$)$ after each operation.