Multiple Thread Cutting Cycle G76 - GSK GSK988TA Manual

GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual【Programming & Operation】
Program:
O0012；
M3 S300 G0 X150 Z50 T0101； （Thread tool）
G0 X65 Z5；
G92 X58.7 Z-28 F3 J3 K1；
X57.7 J3 K1 ；
X57 J3 K1；
X56.9 J3 K1；
M30；

2.20.4 Multiple Thread Cutting Cycle G76

Command function: Machining thread with specified depth of thread (total cutting depth) is
Command format：G76 P（m） （r） （a） Q（ △ dmin） R（d） ；
Command explanations:
Start point
Position before block runs and behind blocks run, defined by A point.
(end point)
End point of
End point D of thread cutting defined by X(U)
thread
of cutting end point is the one of thread cutting, and position after thread run-out of
short axis direction
106
Fig. 2-62
(Rapid traverse)
（Machine thread with 4 times cutting, the first tool infeed 1.3mm）
（The second tool infeed 1mm）
（The third tool infeed 0.7mm）
（The fourth tool infeed 0.1mm）
completed by multiple roughing and finishing, if the defined angle of
thread is not 0°, thread run-in path of roughing is from its top to bottom,
and angle of neighboring thread teeth is the defined angle of thread. G76
can be used for machining the straight and taper thread with thread
run-out path, which is contributed to thread cutting with single tool edge
to reduce the wear of tool and to improve the precision of machining
thread. But G76 cannot be used for machining the face thread. Machining
path is as Fig.2-63.
G76 X（U） Z（W） R（i） P（k） Q（ △ d） F
Z(W) .The length axis direction
J_ K_；