Heidenhain MANUALplus 4110 User Manual download pdf (Page 342)

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342 6 DIN Programming

6.15 Thread Cycles

Tapered API thread G352

This cycle cuts a tapered single or multi-start API thread. The depth of

thread decreases at the overrun at the end of thread.

Parameters

 X end point of thread (diameter value)

 Z end point of thread

 XS starting point of thread (diameter value)

 ZS starting point of thread

 F thread pitch

 U thread depth

 U>0: Internal thread

 U<=0: External thread (lateral surface or front face)

 U= +999 or –999: Thread depth is calculated

 I maximum infeed—default: I is calculated from the thread pitch and

the thread depth.

 A feed angle (default: 30°):

Range: –60° < A < 60°

 A>0: Infeed on right thread flank

 A<0: Infeed on left thread flank

 D number of thread starts (default: 1)

 W taper angle (default: 0°): Range: –45° < W < 45°

 WE run-out angle (default: 12°):

Range: 0° < WE < 90°

 J remaining cutting depth (default: 1/100 mm)

Internal or external threads: See algebraic sign of "U."

Proportioning of cuts: The first cut is performed at the cutting depth

defined for "I" and is reduced with each cut until the tool reaches the

"remaining cutting depth J."

Handwheel superposition (provided that your machine is equipped

accordingly): The superposition is limited to the following range:

 X direction: Depends on the current cutting depth; the starting and

end points of the thread are not exceeded.

 Z direction: No more than one turn; the starting and end points of

the thread are not exceeded.

Definition of taper angle: XS/ZS, X/Z, or XS/ZS, Z, W, or

ZS, X/Z, W

Example: G352

%352.nc

[G352]

N1 T45 G97 S1500 M3

N2 G0 X13 Z4

N3 G352 X16 Z-28 XS13 ZS0 F1.5 U-999

WE12

END

 "Cycle STOP" becomes effective at the end of a thread

cut.

 The feed rate and spindle speed overrides are not

effective during cycle execution.

 Handwheel superposition is activated with a switch

located on the machine operating panel.

 Feedforward control is switched off.

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