239
8.3 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
THREAD MILLING/COUNTERSINKING
(Cycle 263)
1
The TNC positions the tool in the tool axis at rapid traverse FMAX
to the programmed setup clearance above the workpiece surface.
Countersinking
2
The tool moves at the feed rate for pre-positioning to the
countersinking depth minus the setup clearance, and then at the
feed rate for countersinking to the countersinking depth.
3
If a safety clearance to the side has been entered, the TNC
immediately positions the tool at the feed rate for pre-positioning
to the countersinking depth
4
Then, depending on the available space, the TNC makes a
tangential approach to the core diameter, either tangentially from
the center or with a pre-positioning move to the side, and follows
a circular path.
Countersinking at front
5
The tool moves at the feed rate for pre-positioning to the sinking
depth at front.
6
The TNC positions the tool without compensation from the center
on a semicircle to the offset at front, and then follows a circular
path at the feed rate for countersinking.
7
The tool then moves in a semicircle to the hole center.
Thread milling
8
The TNC moves the tool at the programmed feed rate for pre-
positioning to the starting plane for the thread. The starting plane
is determined from the thread pitch and the type of milling (climb
or up-cut).
9
Then the tool moves tangentially on a helical path to the thread
diameter and mills the thread with a 360° helical motion.
10
After this, the tool departs the contour tangentially and returns to
the starting point in the working plane.
Содержание TNC 426
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Страница 8: ...IV...
Страница 10: ...VI...
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Страница 27: ...1 Introduction...
Страница 41: ...2 Manual Operation and Setup...
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Страница 55: ...3 Positioning with Manual Data Input MDI...
Страница 59: ...4 Programming Fundamentals of NC File Management Programming Aids Pallet Management...
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Страница 123: ...5 Programming Tools...
Страница 153: ...6 Programming Programming Contours...
Страница 201: ...7 Programming Miscellaneous functions...
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Страница 227: ...8 Programming Cycles...
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Страница 367: ...9 Programming Subprograms and Program Section Repeats...
Страница 381: ...10 Programming Q Parameters...
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Страница 425: ...11 Test run and Program Run...
Страница 443: ...12 MOD Functions...
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Страница 473: ...13 Tables and Overviews...
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