[step-manufacturing] Minutes of May 2nd telecon

[Martin Hardwick]

Attendees:

Martin Hardwick, STEP Tools, USA
David Loffredo, STEP Tools, USA
David Odendahl, Boeing, USA
Sid Venkatesh, Boeing, USA
Ted Driggs, Okuma, USA
Liming Li, JSL Innovations, USA
Larry Maggiano, Mitutoyo, USA
Udo Herbes, DMG, USA
Bob Ericksson, P&W, USA
Thanh Huyn, Okuma, USA
Ted Driggs, Okuma, USA
Clinton Christian, Renishaw, Canada
Daniel, Niederwestberg, DMG, Germany
Michael Kirbach, DMG, Germany
Saur Anfreas, DMG Germany
Alain Brail, Airbus (retired), France
Christian Callet, Datakit, France
John Bijnens, KU Leuven, Belgium
Bengt Olssen, Sandvik, Sweden
Mikael Hedlind, Scania, Sweden
Norm Swindells, Ferroday, UK
M.R.IT Amsterdam, Iscar, Israel
Jung-Ho Cho, Hyundai, Korea
Hakchul Lee, Hyundai, Korea

We discussed the stage models and agreed on the following rules:

  * Stage 1 - 50mm cutter,  all pocket radii > 26mm, fillets to match
    shoulder radius of cutter   3-axis machining
  * Stage 2 - 20mm cutter, all pocket radii > 10.5mm, same z-depth as
    stage 1, (process can make steps) 3-axis machining
  * Stage 3 - 20mm & 16mm cutters, 50 thou on final , 4mm bottom radius,
    pocket radii > 8.4 mm,  fix the ding, 5-axis machining
  * Stage 4 - 20mm (2.5mm radius)  & 16mm (2mm radius) cutters,
    machining to nominal, suggest programming for tool with 4mm radii
    and machine with 2mm radii when necessary

Stage 1 removes material using a single large tool.

Stage 2 removes the remaining 3-axis material.

Sage 3 prepares for the 5-axis machining by leaving a constant shell.

Stage 4 meets the tolerances in a single pass.

Stage 4 is developed by design. Stage 3 can be made using automated 
tools. Stage 1 requires creative thought but can be made quite quickly 
using a CAD system. Stage 2 is the most challenging because the Stage 3 
shell is not easy to manipulate.

The next conference call will be at the regular times on Wednesday.

Martin Hardwick
Convener WG15



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