SYNTAX
G92 X… Z…F…
Where
X CORE DIAMETER
Z LENGTH OF THREAD
F FEED RATE(EQUAL TO PITCH VALUE)
NOTE:TOOL POSITION DISTANCE IS ALWAYS EQUAL TO PITCH VALUE IN Z AXIS.
THREADING TOOL
1)EXTERNAL THREADING TOOL
2)INTERNAL THREADING TOOL
Profile
Billet size⇒diameter 20,length 50
Tool used⇒External Threading Tool(T1)
Core diameter calculation
CORE DIA= MAJOR DIA. - 2 (DEPTH OF CUT)
WHERE :-
DEPTH OF CUT = .61 x PITCH
DEPTH OF CUT = .61 x 2.5
= 1.53
MAJOR DIA. = 20
CORE DIA = 20 - 2(1.53)
=16.94
NC code
G21 G97 G98
G28 U0 W0
M06 T1
M03 S3000
G00 X22 Z2.5
G92 X19.5 Z-48 F2.5
X19.0
X18.5
X18.0
X17.5
X17.0
X16.932 //core dia
G28 U0 W0
M05
M30
Category: