HEIDENHAIN TNC 406 - Manual (Page 174)

HEIDENHAIN TNC 406, TNC 416 153
8.4 Er
osion Cy
cles
Cycle 17 DISK in the part program, example 1
Practice examples: Eroding with Cycle 17 DISK
Workpiece geometry
Cavity diameter D = 24 mm
Eroding depth T = –10 mm
Electrode data
Cylindrical electrode
Electrode radius Re = 9.9 mm
Electrode undersize U = 4.2 mm
Width of the erosion gap B= 0.1 mm
Calculation of the expansion radius
Expansion radius for Cycle 17 DISK
RAD = (0.5 • 4.2 mm) – 0.1 mm = 2 mm
Example 1, top illustration:
Pre-position over the workpiece surface, circular
expansion.
Example 2, bottom illustration:
Erode to –10 mm depth, circular expansion
without pecking.
Y
X
Z
24 mm
Y
X
Z
24 mm
0 BEGIN PGM EXDISK1 MM
1 BLK FORM 0.1 Z X+0 Y+0 Z–20
2 BLK FORM 0.2 X+100 Y+100 Z+0
3 CYCL DEF 1.0 GENERATOR Cycle GENERATOR (see ”Cycle 1 GENERATOR” on page 133)
4 CYCL DEF 1.1 P-TAB CUST1 Desired erosion table
5 CYCL DEF 1.2 MAX=8 MIN=8 Select power stage
6 TOOL DEF 1 L+0 R+9.9 Electrode length, electrode radius
7 TOOL CALL 1 Z U+4.2 Undersize
8 L X+50 Y+50 Z+1 R0 F MAX Pre-positioning
9 CYCL DEF 17.0 DISK Cycle 17 DISK (see ”Cycle 17 DISK” on page 142)
10 CYCL DEF 17.1 Z–10 R F M36 Eroding depth Z = –10 mm, eroding ON
11 CYCL DEF 17.2 RAD=2 MOD=0 Expansion radius RAD = 2 mm, circular expansion
13 L Z+100 R F MAX M37 Retract to set-up clearance, eroding OFF
14 END PGM EXDISK1 MM