HEIDENHAIN CNC Pilot 4290 - Manual (Page 327)

HEIDENHAIN CNC PILOT 4290 315
6.13 A
u
tomatic W
o
rking Plan Gener
ation (A
WG)
Main machining Submachining Location Execution
Contour recessing – continued
Contour-parallel Inside/front Axial machining – inside
■ If contour recessing precedes hollowing in
the machining sequence, recess areas are
machined by contour recessing. – exception:
no suitable tools are available.
■ Recess turning – contour turning are used
alternatively.
Recessing Contour analysis: Determining the recess type:
■ Form element S (guarding ring – recess type S)
■ Form element D (sealing ring – recess type D)
■ Form element A (recess general)
■ Form element FD (relief turn F) - for FD, a recess
operation is used only in conjunction with ”inward
copying angle EKW + mtw (contour recessing angle).
Sequence: Outside machining before inside machining
machining parameters for form element FD: Global
finished-part parameters (1)
– – All recess types; radial/axial machining; outside and
inside
Type S, D, A, FD (*) Outside Radial machining – outside
Type S, D, A, FD (*) Inside Radial machining – inside
Type A, FD (*) Outside/front Axial machining – outside
Type A, FD (*) Inside/front Axial machining – inside
*: Define the recess type
Undercuts Contour analysis/machining: Determining the undercut
types:
■ Form element H is machined using individual traverse
paths; copying tool (type 22x)
■ Form element K is machined using individual traverse
paths; copying tool (type 22x)
■ Form element U is machined using individual traverse
paths; Recessing tool (type 15x)
■ Form element G is machined with cycle G860
Sequence: External machining precedes internal
machining; radial machining precedes axial machining.
– – All recess types; outside and inside
Type H, K, U, G (*) Outside Machining, outside