155
HEIDENHAIN TNC 426 B, TNC 430
PECKING (Cycle 1)
1
The tool drills from the current position to the first plunging
depth at the programmed feed rate F.
2
When it reaches the first plunging depth, the tool retracts in rapid
traverse FMAX to the starting position and advances again to the
first plunging depth minus the advanced stop distance t.
3
The advanced stop distance is automatically calculated by the
control:
■
At a total hole depth of up to 30 mm: t = 0.6 mm
■
At a total hole depth exceeding 30 mm: t = hole depth / 50
Maximum advanced stop distance: 7 mm
4
The tool then advances with another infeed at the programmed
feed rate F.
5
The TNC repeats this process (1 to 4) until the programmed total
hole depth is reached.
6
After a dwell time at the hole bottom, the tool is returned to the
starting position in rapid traverse FMAX for chip breaking.
Before programming, note the following:
Program a positioning block for the starting point (hole
center) in the working plane with RADIUS
COMPENSATION R0.
Program a positioning block for the starting point in the
tool axis (set-up clearance above the workpiece surface).
The algebraic sign for the cycle parameter TOTAL HOLE
DEPTH determines the working direction.
ú
Setup clearance (incremental value): Distance
between tool tip (at starting position) and workpiece
surface
ú
Total hole depth Depth Q201 (incremental value):
Distance between workpiece surface and bottom of
hole (tip of drill taper)
ú
Plunging depth (incremental value):
Infeed per cut. The tool will drill to the total hole depth
in one movement if:
■
the plunging depth equals the total hole
depth
■
the plunging depth is greater than the total
hole depth
The total hole depth does not have to be a multiple of
the plunging depth.
ú
Dwell time in seconds: Amount of time the tool
remains at the total hole depth for chip breaking
ú
Feed rate F: Traversing speed of the tool during
drilling in mm/min
8.2 Dr
illing Cy
cles
X
Z
Example NC blocks:
1 CYCL DEF 1.0 PECKING
2 CYCL DEF 1.1 SET UP 2
3 CYCL DEF 1.2 DEPTH -20
4 CYCL DEF 1.3 PECKG 5
5 CYCL DEF 1.4 DWELL 0
6 CYCL DEF 1.5 F500
kkap8.pm6
30.06.2006, 07:03
155
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Summary of Contents for TNC 426 B
Page 3: ...BAUSKLA PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Page 4: ...BAUSKLA PM6 30 06 2006 07 03 3 www EngineeringBooksPdf com ...
Page 6: ...CINHALT PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Page 16: ...CINHALT PM6 30 06 2006 07 03 12 www EngineeringBooksPdf com ...
Page 17: ...Introduction 1 Dkap1 pm6 30 06 2006 07 03 1 www EngineeringBooksPdf com ...
Page 29: ...Manual Operation and Setup 2 Dkap2_3 pm6 30 06 2006 07 03 13 www EngineeringBooksPdf com ...
Page 83: ...Programming Tools 5 Fkap5 pm6 30 06 2006 07 03 67 www EngineeringBooksPdf com ...
Page 106: ...Fkap5 pm6 30 06 2006 07 03 90 www EngineeringBooksPdf com ...
Page 107: ...Programming Programming Contours 6 Gkap6 pm6 30 06 2006 07 04 91 www EngineeringBooksPdf com ...
Page 165: ...Hkap7 pm6 30 06 2006 07 03 150 www EngineeringBooksPdf com ...
Page 166: ...Programming Cycles 8 kkap8 pm6 30 06 2006 07 03 151 www EngineeringBooksPdf com ...
Page 253: ...kkap8 pm6 30 06 2006 07 04 238 www EngineeringBooksPdf com ...
Page 265: ...LKAP9 PM6 30 06 2006 07 04 250 www EngineeringBooksPdf com ...
Page 266: ...Programming Q Parameters 10 MKAP10 PM6 30 06 2006 07 04 251 www EngineeringBooksPdf com ...
Page 297: ...MKAP10 PM6 30 06 2006 07 04 282 www EngineeringBooksPdf com ...
Page 298: ...Test Run and Program Run 11 NKAP11 PM6 30 06 2006 07 04 283 www EngineeringBooksPdf com ...
Page 312: ...MOD Functions 12 Okap12 pm6 30 06 2006 07 04 297 www EngineeringBooksPdf com ...
Page 332: ...Tables and Overviews 13 Pkap13 pm6 30 06 2006 07 04 317 www EngineeringBooksPdf com ...