157HEIDENHAIN TNC 426 B, TNC 430
ú
Workpiece surface coordinate Q203 (absolute value):
Coordinate of the workpiece surface
ú
2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
REAMING (Cycle 201)
1 The TNC positions the tool in the tool axis at rapid traverse FMAX
to the programmed set-up clearance above the workpiece
surface.
2 The tool reams to the entered depth at the programmed feed
rate F.
3 If programmed, the tool remains at the hole bottom for the
entered dwell time.
4 The tool then retracts to set-up clearance at the feed rate F, and
from there — if programmed — to the 2nd set-up clearance in
FMAX.
Before programming, note the following:
Program a positioning block for the starting point (hole
center) in the working plane with RADIUS
COMPENSATION R0.
The algebraic sign for the depth parameter determines
the working direction.
ú
Set-up clearance Q200 (incremental value): Distance
between tool tip and workpiece surface.
ú Depth Q201 (incremental value): Distance between
workpiece surface and bottom of hole
ú Feed rate for plunging Q206: Traversing speed of the
tool during reaming in mm/min
ú
Dwell time at depth Q211: Time in seconds that the
tool remains at the hole bottom
ú
Retraction feed rate Q208: Traversing speed of the
tool in mm/min when retracting from the hole. If you
enter Q208 = 0, the tool retracts at the reaming feed
rate.
ú
Workpiece surface coordinate Q203 (absolute value):
Coordinate of the workpiece surface
ú
2nd set-up clearance Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
X
Z
Q200
Q201
Q206
Q211
Q203
Q204
Q208
8.2 Drilling Cycles
Example NC blocks:
8 CYCL DEF 201 REAMING
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR PLUNGING
Q211=0.25 ;DWELL TIME AT BOTTOM
Q208=500 ;RETRACTION FEED TIME
Q203=+0 ;SURFACE COORDINATE
Q204=50 ;2. SET-UP CLEARANCE
kkap8.pm6 30.06.2006, 07:03157
www.EngineeringBooksPdf.com
To Next Page
Loading...
Need help?
General
