8
Cycles
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8.3 Cycles for Milling Pockets, Studs and Slots
CIRCULAR STUD FINISHING (Cycle 215)
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The aiqebraic sign $w cycle parameter DEPTH defines
the working direction.
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If it is necessary to rnifl a stud from s&id, use a center-cut end mill (IS0 1 B4lf and enter a low positioning feed
ws~.
Process
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The TNC moves the tool in the Z axis to the setup clearance, or-if this
has been specified-to the 2nd setup clearance and subsequently to
the center of the stud.
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From the center of the stud the tool moves in the working plane to the
starting point for machining. For calculating the starting point, the TNC
takes into account the diameter of the finished part and the tool radius.
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If the tool is at the 2nd setup clearance, the TNC moves the tool in
rapid traverse to the setup clearance and from there at the positioning
feed rate to the first infeed depth.
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The tool subsequently moves tangentially to the contour of the finished
part and, using climb milling, machines one revolution.
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After this, the tool moves tangentially away from the contour, back to
the starting point in the working plane.
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This process is repeated until the programmed depth is reached.
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At the end of the cycle the TNC moves the tool at rapid traverse to the
setup clearance or-if this has been specified-to the 2nd setup
clearance and subsequently to the center of the stud (end position =
Fig. 8.24: CIRCULAR STUD FINISHING cycle
starting position).
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TNC 370
8-25
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