[step-manufacturing] Minutes of 12th conf call and registration
Martin Hardwick
hardwick at steptools.com
Mon Apr 6 13:52:47 EDT 2009
All,
If you are planning to join us at the demonstration on May 14-15 in
Washington State please register using the forms at:
http://www.steptools.com/library/stepnc/2009_renton/
Attendees
---------------
Martin Hardwick, STEP Tools
Mikael Hedlind, KTH
Magnus Lundgren, KTH
Bengt Olsson, Sandvik
Alain Brail, AlBavis
Fred Proctor, NIST
David Loffredo, STEP Tools
Chris Pfeifer, CCAT
David Odendahl, Boeing
Ian Stroud, EPFL
Larry Maggiano, Mitutoyo
John Horst, NIST
Bob Erickson, Pratt and Whitney
Apologies for absence
--------------------------------
Xun Xu, University of Auckland
Leon Xu, Boeing
Sid Venkatesh, Boeing
Aydin Nassehi, University of Bath
Data has been posted for both the five axis and three axis version of
the part to the ftp site. The data includes a word file describing
the tools and a AP-203 files describing the stock and workpiece.
ftp://ftp.steptools.com/private/Vancouver/Nominal_manufacturing_data_package/
The stock prepared by Boeing is 2024 aluminium, however 6061 and 7075
aluminium are also acceptable. The prepared stock has four counter
sunk holes for fixturing.
The AP-203 model exported from the CAD system includes a point set
describing the measurement points. The STEP-NC Explorer needs to be
updated to show these points.
A demonstration was given of collision detection using the machine
tool model of the Northwood Gantry machine at Boeing.
We discussed methods for aligning the workpieces. There was agreement
that the best method was for the CAD/CAM system to export its data
with the workpieces already aligned with the toolpaths. If they are
not aligned then the method for fixing the placements needs to be
simple and easy to use. The axis orientations should be fixed first
and in practice the orientations are usually wrong by a multiple of
90 degrees but occasionally 45 degrees. Once the orientation has been
fixed it is not so difficult to fix the positioning by jogging the
part location.
We discussed the AP-238 implementation levels. At present there are
four conformance class in AP-238. CC1 describes tool paths. CC2
describes tool paths and workpieces. CC3 describes machining
operations and CC4 describes GD&T.
The next conference call will be held on Wednesday April 17th at the
usual times.
Action items
------------------
1. David Odendahl to check on the delivery of the stock to the participants.
2. Participants to download the data and prepare to machine the part.
3. STEP Tools to enhance the STEP-NC Explorer to show the measurement points.
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