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Tapping with chip breaking (cycle 209) – HEIDENHAIN iTNC 530 (340 49x-04) User Manual

Page 382

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382

8 Programming: Cycles

8.5 Cy

cles f

o

r Dr

illing, T

a

pping and Thr

ead Milling

TAPPING WITH CHIP BREAKING (Cycle 209)

The tool machines the thread in several passes until it reaches the
programmed depth. You can define in a parameter whether the tool is
to be retracted completely from the hole for chip breaking.

1

The TNC positions the tool in the tool axis at rapid traverse FMAX
to the programmed set-up clearance above the workpiece surface.
There it carries out an oriented spindle stop.

2

The tool moves to the programmed infeed depth, reverses the
direction of spindle rotation and retracts by a specific distance or
completely for chip release, depending on the definition. If you
have defined a factor for increasing the spindle speed, the TNC
retracts from the hole at the corresponding speed

3

It then reverses the direction of spindle rotation again and
advances to the next infeed depth.

4

The TNC repeats this process (2 to 3) until the programmed thread
depth is reached.

5

The tool is then retracted to the set-up clearance. If programmed,
the tool moves to the 2nd set-up clearance at FMAX.

6

The TNC stops the spindle turning at set-up clearance.

Machine and control must be specially prepared by the
machine tool builder for use of this cycle.

This cycle is effective only for machines with controlled
spindle.