Page 428 - Gear Technology Solutions

The end chip plunge passes heel can be ignored for Uniflex. Only in the
Unimill process with endmills, the end-chip tells the machine to set in by the
end-chip amount from one swing pass to the next.

In case the plunge was activated with the plunge depth factor ≠ 0., an X axis
and a Z-axis feed angle can be entered in order to optimize the chip load on
the cutting edge. For good feed angle input refer to the “Vector Feed Definition
Manual” [1].

Additional withdraw heel and toe moves the tool away from the slot perpen-
dicular to the root. This input is used, if the swing overtravel heel and toe is not
possible due to machine axes travel limitations. At heel and toe a change from
the actual to the next roll position takes place. During that change, the tool
should not contact the flank surface, because this could cause a large immedi-
ate chip removal and surface mutilations (see Figure 7, bottom graphic).

Additional roll heel/top will roll the tool further out of slot engagement. In a
roll only process (without plunge) this input has to be optimized.

Additional roll toe/bottom is often used with negative input in cases when
the clearance side of the tool removes too much material from the opposite
flank, which causes clean-up problems, process disturbance as well as re-
duced tool life.

Swing overtravel heel and toe is preferred versus additional withdraw, be-
cause it results in more harmonic process motions and is faster than a tool
withdrawal (see Figure 7, Top Graphic).

The input item index clearance is added (or subtracted) to the default index
position, which is calculated by the software.

Index interval has the same function as it is known from standard spiral bevel
gear summaries. The input “0” and “1” do not activate any skip index, consecu-
tive slots are machined. If the input is for example “2”, then every other tooth is
skipped when the machine indexes to the next slot to be machined (slot
1,3,5...). It is recommended to use “0” as input.

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