[step-manufacturing] Minutes of the Stockholm meeting June 11-15 2012

[Martin Hardwick]

ISO STEP Meeting.
Stockholm, Sweden
June 11th to 15th

Attendees

First name 	Last name 	Organisation 	Country 	
Alain 	Brail 	Albavis 	France 	
Alexandre 	Fournier 	Boost-Conseil 	France 	
Patrick 	Marchand 	CETIM 	France 	
Lothar 	Klein 	LKSoftWare GmbH 	Germany 	
Doron 	Cohen 	ISCAR LTD. 	Israel 	
Fumiki 	Tanaka 	Hokkaido University 	Japan 	online
Dong Hoon 	Lee 	Korea Database Agency 	Republic of Korea 	
Sung Joon 	Lim 	Korea Database Agency 	Republic of Korea 	
Jonas 	Nordström 	Jonor 	Sweden 	
Andreas 	Archenti 	KTH Royal Institute of Technology 	Sweden 	
Christer 	Wickman 	KTH Royal Institute of Technology 	Sweden 	
Danfang 	Chen 	KTH Royal Institute of Technology 	Sweden 	
Gunilla 	Sivard 	KTH Royal Institute of Technology 	Sweden 	
Jonny 	Gustafsson 	KTH Royal Institute of Technology 	Sweden 	
Lars 	Lindberg 	KTH Royal Institute of Technology 	Sweden 	
Linus 	Persson 	KTH Royal Institute of Technology 	Sweden 	
Magnus 	Lundgren 	KTH Royal Institute of Technology 	Sweden 	
Mikael 	Hedlind 	KTH Royal Institute of Technology 	Sweden 	
Qiuling 	Huang 	KTH Royal Institute of Technology 	Sweden 	
Torsten 	Kjellberg 	KTH Royal Institute of Technology 	Sweden 	
Yujiang 	Li 	KTH Royal Institute of Technology 	Sweden 	
Bengt 	Olsson 	Sandvik Coromant 	Sweden 	
Linda 	Estman 	Sandvik Coromant 	Sweden 	
Susanne 	Wretlind 	Sandvik Coromant 	Sweden 	
Sune 	Horkeby 	Siemens Industrial Turbomachinery AB 	Sweden 	
Ian 	Stroud 	EPFL École Polytechnique Fédérale De Lausanne 	Switzerland 	
Aydin 	Nassehi 	University of Bath 	UK 	
Fred 	Proctor 	NIST 	US 	online
Ronnie 	Fesperman 	NIST 	US 	online
Bob 	Erickson 	Pratt & Whitney 	US 	online
David 	Loffredo 	STEP Tools Inc. 	US 	
Martin 	Hardwick 	STEP Tools Inc. 	US 	
Leon 	Xu 	The Boeing Company 	US 	
Sid 	Venkatesh 	The Boeing Company 	US 	


The meeting results are presented at: 
http://www.steptools.com/library/stepnc/2012_stockholm/

Monday June 11th
--------------------------
We discussed the modeling of semantic tolerances for distributed 
assemblies. The key issue is how to represent a semantic tolerance when 
the constrained faces are in different file(s) to the tolerances. Two 
solutions were discussed and will be tested in the coming months.

1 Use different information models for the two cases so that a tolerance 
is represented using one set of entities when the faces are in a 
different file, and a different set of entities when they are in the 
same file.
2. Extend Part 21 to include a new section that models the references in 
to and out of a file as URI's so that the same representation can be 
used for both internal and external tolerances.

Tuesday June 12th
-------------------------
We began the discussion of CAM to CAM data exchange that continued on 
Friday.

Thursday June 14th
---------------------------
The meeting was held in the XPRES Manufacturing Research Laboratories 
(www.xpres.se) of KTH. Many thanks to Professor Torsten Kjellberg, Dr. 
Gunilla Sivard and their team for letting us use their excellent 
research facilities.

The scenario planned at the beginning of the project was demonstrated. 
Multiple CAD and CAM systems were used to build the STEP data defined by 
the STEP and STEP-NC standards.  Videos showing how KTH made the data 
have been placed on the demonstration web page. Custom systems were used 
to "fill in the gaps" where a commercial translator was not yet 
available. They created PMI data for the tolerances, kinematic and 
accuracy data for the machine, and catalog data for the cutting tools.

http://www.youtube.com/watch?v=efNy7P3wLQ4&feature=youtu.be

The machining accuracy demonstration showed how to predict the accuracy 
of a machine tool for a particular part in a particular setup by 
measuring the loaded and unloaded accuracy of a machine tool. The 
unloaded accuracy was measured as per the ISO 230 specifications and 
represented both as ASME B 5.59-2 and STEP data. The loaded accuracy was 
predicted using a loaded double ball bar test developed by KTH and tool 
force load software developed by Boeing.

The results were good with a strong correlation between the accuracy 
predictions and the measured part tolerances, but further testing is 
necessary because of differences in the predicted and measured accuracy 
of the Y axis.

Other demonstrations showed the usage of a holographic table to view the 
motions of a machine tool with data loaded from JavaScript on the STEP 
Tools web site.

http://www.steptools.com/demos/stepnc.html

The definition of tool changer motions was shown by exporting the 
kinematics from NX using one of the custom translators developed by KTH. 
The data was loaded into a viewer  to verify and execute the STEP 
kinematics.

ftp://www.steptools.com/private/Stockholm2/mach-viewer.zip

The definition of PMI for a cutting tool assembly was demonstrated by 
assembling components from two tool vendors (ISCAR and Sandvik 
Coromant). Tolerances were then added to the assembly using NX. A tool 
developed by KTH associated the tolerances with the properties defined 
by ISO 13399. The result was then exported as an AP242 file and viewed 
in ST-Machine and a STEP viewer developed by LKSoft.

ftp://www.steptools.com/private/Stockholm2/T1_cutting_tool_assembly_100_AP242.stp
http://www.youtube.com/watch?v=qKqmrVn5ubE&feature=youtu.be
http://www.youtube.com/watch?v=DUghssxjqkw&feature=youtu.be
http://www.youtube.com/watch?v=HZ_IHFuFFo8&feature=youtu.be

Friday June 15th
-----------------------
We continued the discussions on CAM to CAM data exchange. We agreed to 
make a presentation to the CAM vendors at the IMTS show on Thursday 
September 13th. The presentation must emphasize the value proposition 
for vendors and users. An invitation letter was drafted and reviewed.

ftp://www.steptools.com/private/CAM_exchange/CAM_Plan.pptx

We discussed the next steps. Mikael Hedlind suggested that a STEP-NC 
Notepad should be developed to enable the development and editing of 
toolpaths. We reviewed the STEP cloud architecture and made changes to 
reflect the harmonization of AP242 and AP238.

ftp://www.steptools.com/private/CAM_exchange/STEP_cloud.pptx
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