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Fastening, Joining & Assembly

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Would You Consider Fastener Alternatives?

Posted April 13, 2009 8:23 AM

As recently, a new symbol has been created for use in CAD drawings to specify adhesives via virtually all characteristic property and processing options. It was created is to make it easier for designers to use this joining technique to assemble products. In the near future, a downloadable plug-in file will be available for use in AutoCAD, TurboCAD, and other programs. Do you think this future option makes specifying adhesives easier? How important is CAD to your designs?

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Anonymous Poster
#1

Re: Would You Consider Fastener Alternatives?

04/14/2009 11:06 AM

Grammatically incorrect.

Reply Score 1 for Off Topic
Anonymous Poster
#3
In reply to #1

Re: Would You Consider Fastener Alternatives?

04/24/2009 12:53 PM

What is grammatically incorrect?

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Anonymous Poster
#2

Re: Would You Consider Fastener Alternatives?

04/23/2009 11:23 AM

I think the new proposed adhesives symbol on drawings is not a good idea. There is too much information that has to be presented on a drawing. (think KISS) I think a better way would be to assign a letter symbol to the joint requiring adhesive and refer to a separate schedule for details. This can be in the form of a general note or a separate list. Engineering drawings are viewed by people with various educational backgrounds. What may be understood by the engineer may not be pertinent to others and could result in confusion or misrepresentation.

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Member

Join Date: May 2009
Location: Huntington Beach, Cal.
Posts: 8
#4
In reply to #2

Re: Would You Consider Fastener Alternatives?

05/13/2009 12:19 AM

As a Materials and Process Engineer with over 20 years experience with composites in the aerospace industry, I would agree with the previous comment, except for the statement, "..assign a letter symbol to the joint requiring adhesive and refer to a separate schedule for details. This can be in the form of a general note or a separate list.". This is not a new concept, but one that has been in place for decades. Of all the 2D blueprints and CAD models I've ever seen and made, the components and areas to be bonded are identified by a flagnote (FN). That flagnote will describe the pertinent bonding specification to be used which contains the bond process. Adding a new symbol to identify and perform a function for a symbol already in place that does the same thing is redundant and adds no value.

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Guru

Join Date: Oct 2008
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#5
In reply to #4

Re: Would You Consider Fastener Alternatives?

05/29/2009 10:52 AM

I agree. Processing adhesives is a far more complex task than inserting a screw and tightening it to spec.

I spent 25 years in the aerospace industry. We built electronics for the space shuttle, among other things, and did just fine using process information not actually on the drawing.

Wow, that makes me old doesn't it.

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