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Technical Discussions
John Wagner
Engineering
Tenneco Automotive, USA, Joined Apr 2004, 3

John Wagner

Engineering
Tenneco Automotive,
USA,
Joined Apr 2004
3
04:46 May-12-2004
Ultrasonic Testing of Adhesive Bonds

The product is an automotive suspension component consisting of a torus of rubber molded between and bonded to two
coaxial steel cylinders. Attempts to test the bond via ultrasonics required submersion of the product in water. The result, even if successful, is an unsaleable product. What is needed is a technique for evaluating the bond on prototypes developed to complete FMEA testing prior to full scale production. Any suggestions for an application generally applicable to a range of products of this type would be appreciated.


    
 
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John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
03:39 May-12-2004
Re: Ultrasonic Testing of Adhesive Bonds
Try calling NDT Automation Division of Physical Acoustics in Princeton New Jersey. Their T-SCOUT System may do the job.


    
 
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Richard Kazares
Richard Kazares
06:00 May-13-2004
Re: Ultrasonic Testing of Adhesive Bonds
As you probably know, there are more ways than submersion in water to introduce an ultrasonic coupling techniques.

We have successfully used squirters, bubblers (weepers) - which use minute amounts of water only on the surface, and other elastomer couplants - which are typically used in wheel probes - but can also be fixed - WITHOUT any water couplant (or other gel-like materials) used.

Depending on your inspection requirements (I'm assuming you are looking for the bond between metal and elastomer - but you could possibly be looking at the elastomer consistency itself) there are other factors that might come into play.

I'd be happy to answer you directly - and in more detail, just send an e-mail.

----------- Start Original Message -----------
: The product is an automotive suspension component consisting of a torus of rubber molded between and bonded to two
: coaxial steel cylinders. Attempts to test the bond via ultrasonics required submersion of the product in water. The result, even if successful, is an unsaleable product. What is needed is a technique for evaluating the bond on prototypes developed to complete FMEA testing prior to full scale production. Any suggestions for an application generally applicable to a range of products of this type would be appreciated.
------------ End Original Message ------------




    
 
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