8 Programming: Cycles
164
RIGID TAPPING (Cycle 17)
Machine and control must be specially prepared by the
machine tool builder to enable rigid tapping.
The TNC cuts the thread without a floating tap holder in one or
more passes.
Rigid tapping offers the following advantages over tapping with a
floating tap holder
■
Higher machining speeds possible
■
Repeated tapping of the same thread is possible; repetitions are
enabled via spindle orientation to the 0° position during cycle call
(depending on machine parameter 7160).
■
Increased traverse range of the spindle axis due to absence of a
floating tap holder.
Before programming, note the following:
Program a positioning block for the starting point (hole
center) in the working plane with radius compensation R0.
Program a positioning block for the starting point in the
tool axis (set-up clearance above the workpiece surface).
The algebraic sign for the parameter total hole depth
determines the working direction.
The TNC calculates the feed rate from the spindle speed.
If the spindle speed override is used during tapping, the
feed rate is automatically adjusted.
The feed-rate override knob is disabled.
At the end of the cycle the spindle comes to a stop.
Before the next operation, restart the spindle with M3
(or M4).
ú
Setup clearance (incremental value): Distance
between tool tip (at starting position) and workpiece
surface
ú
Total hole depth (incremental value): Distance
between workpiece surface (beginning of thread) and
end of thread
ú
PITCH :
Pitch of the thread. The algebraic sign differentiates
between right-hand and left-hand threads:
+
= right-hand thread
–
= left-hand thread
8.2 Dr
illing Cy
cles
X
Z
Retracting after a program interruption
If you interrupt program run during tapping with the
machine stop button, the TNC will display the soft
key MANUAL OPERATION. If you press the MANU-
AL OPERATION key, you can retract the tool under
program control. Simply press the positive axis
direction button of the active tool axis.
Example NC blocks:
18 CYCL DEF 17.0 RIGID TAPPING GS
19 CYCL DEF 17.1 SET UP 2
20 CYCL DEF 17.2 DEPTH -20
21 CYCL DEF 17.3 PITCH +1
kkap8.pm6
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Summary of Contents for TNC 426 B
Page 3: ...BAUSKLA PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Page 4: ...BAUSKLA PM6 30 06 2006 07 03 3 www EngineeringBooksPdf com ...
Page 6: ...CINHALT PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Page 16: ...CINHALT PM6 30 06 2006 07 03 12 www EngineeringBooksPdf com ...
Page 17: ...Introduction 1 Dkap1 pm6 30 06 2006 07 03 1 www EngineeringBooksPdf com ...
Page 29: ...Manual Operation and Setup 2 Dkap2_3 pm6 30 06 2006 07 03 13 www EngineeringBooksPdf com ...
Page 83: ...Programming Tools 5 Fkap5 pm6 30 06 2006 07 03 67 www EngineeringBooksPdf com ...
Page 106: ...Fkap5 pm6 30 06 2006 07 03 90 www EngineeringBooksPdf com ...
Page 107: ...Programming Programming Contours 6 Gkap6 pm6 30 06 2006 07 04 91 www EngineeringBooksPdf com ...
Page 165: ...Hkap7 pm6 30 06 2006 07 03 150 www EngineeringBooksPdf com ...
Page 166: ...Programming Cycles 8 kkap8 pm6 30 06 2006 07 03 151 www EngineeringBooksPdf com ...
Page 253: ...kkap8 pm6 30 06 2006 07 04 238 www EngineeringBooksPdf com ...
Page 265: ...LKAP9 PM6 30 06 2006 07 04 250 www EngineeringBooksPdf com ...
Page 266: ...Programming Q Parameters 10 MKAP10 PM6 30 06 2006 07 04 251 www EngineeringBooksPdf com ...
Page 297: ...MKAP10 PM6 30 06 2006 07 04 282 www EngineeringBooksPdf com ...
Page 298: ...Test Run and Program Run 11 NKAP11 PM6 30 06 2006 07 04 283 www EngineeringBooksPdf com ...
Page 312: ...MOD Functions 12 Okap12 pm6 30 06 2006 07 04 297 www EngineeringBooksPdf com ...
Page 332: ...Tables and Overviews 13 Pkap13 pm6 30 06 2006 07 04 317 www EngineeringBooksPdf com ...