Your E-mail and Presentation "Machining features and Machinin g Process Features"

[Martin Hardwick]

Dear All,

My own opinion is that AP-224 is the input to process planning and
AP-238 is the output.

If AP-238 is NOT the output of Process Planning then what is, and
what is the name and functionality of the system that reads in the
new output and writes out AP-238?

Potentially there are lots of applications that want to use the output of
process planning but do these applications have information requirements
that are not satisfied by AP-238 or could not be satisfied by making a
minor enhancement to AP-238?

In PDM STEP did itself a lot of harm by continually inventing new Application
Protocols for trivial reasons- first AP-203 then AP-232 then AP-214 then
PDM Schema then PDM Modules and now PLCS. As an expert it is very unclear
to me why this was necessary. I really hope we can avoid making the same
mistake in manufacturing. Manufacturing is divided into CAD, CAM
and CNC systems how many AP's do we need? My answer is 2.

Martin Hardwick



At 02:48 PM 1/10/2002 +0000, Alan Crawford wrote:

>Dear Chiaki Sakamoto 
>
>Thank you for distributing your set of slides on the machining process feature.  The diagrams, in particular Fig. 1 will be a significant help in identifying the migration of design data in a form ready for machining processes. 
>
>For AP224 the features are design representations prepared in a way useful for manufacture but that the features are independent of the method or processes used to manufacture.  In AP238, the features in a part file need to represent a component in the complete form for that operation, on that workcentre.  An updated approach is required for process planning in STEP,  to establish the machining sequence.  Evidently one new task for process planning is to prepare the feature information in a form required for each workstation, it will also be important to exclude some features not required until later in the manufacturing sequence.
>
>As the scope of STEPNC is extended to consider that more than one machine for the manufacture of a component [the general case], the requirement for in-process features to describe part-machined features is evident.
>
>Best regards 
>
>Alan Crawford 
>
>LSC Group Ltd, Concept House, Victoria Road, Tamworth, Staffordshire, B79 7HL, United Kingdom 
>
>email:  alc at lsc.co.uk 
>Tel:    + 44 (0) 182 770 8582 
>Fax:    + 44 (0) 709 236 3698 
>mobile:         + 44 (0) 797 456 4773 
>
>-----Original Message----- 
>From: chiaki sakamoto [<mailto:chiaki_sakamoto at keg.komatsu.co.jp>mailto:chiaki_sakamoto at keg.komatsu.co.jp] 
>Sent: 07 January 2002 08:37 
>To: Friedrich Glantschnig 
>Cc: Alan Crawford; David Loffredo; Frederick Proctor; Len Slovensky(AP224); Suk-Hwan SUH; Jochen Wolf; Peter Mueller; Yong Tak Hyun; Martin Hardwick; Stefan Heusinger; kisinami at coin.eng.hokudai.ac.jp
>
>Subject: Re: Your E-mail and Presentation "Machining features and Machining Process Features" 
>
>
>
>
>Dear Mr.Glantschnig, 
>
> Thank you for your comments on my proposal. 
>
> My explanation was not enough. 
>So I added Fig.2 and its explanation in the attached file. 
>
> I think we have common understanding about Process Data Model. 
>
>Chiaki Sakamoto 
>Komatsu Engineering 
>
>(See attached file: Machining Process Feature.ppt) 
>
>
>
>
>
>"Friedrich Glantschnig" <fglantschnig at swissonline.ch> $BF|;~(J: 2002/01/03 
>20:07:39 
>
>"Friedrich Glantschnig" <fglantschnig at swissonline.ch>$B$5$s$KJV?.$7$F$/$@$5$$(J 
>
>$B08 at h(J  :   $B:dK\(J $B at i=)(J 
>cc  : "Alan Crawford" <ALC at lsc.co.uk>, "David Loffredo" 
>      <loffredo at steptools.com>, "Frederick Proctor" 
>      <frederick.proctor at nist.gov>, "Len Slovensky\(AP224\)" 
>      <slovensky at scra.org>, "Suk-Hwan SUH" <shs at postech.ac.kr>, "Jochen 
>      Wolf" <j.wolf at wzl.rwth-aachen.de>, "Peter Mueller" 
>      <peter.mueller at erlf.siemens.de>, "Yong Tak Hyun" 
>      <hyt at wzl.rwth-aachen.de>, "Martin Hardwick" <hardwick at steptools.com>, 
>      "Stefan Heusinger" <stefan.heusinger at isw.uni-stuttgart.de> 
>$B7oL>(J  :   Your E-mail and Presentation "Machining features and Machining 
>      Process Features" 
>
> << File: ATT29790.txt >>  << File: Internet HTML >>  << File: Machining Process Feature.ppt >> 
>
>
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