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Engineering Materials

Slideshow: Adhesives Make BMW's All-Carbon Composite Body-in-White

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Ann R. Thryft
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Re: ADHESIVES AND BMWS
Ann R. Thryft   3/5/2014 6:24:27 PM
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Glad you enjoyed it bobjengr. Thanks for your (as usual) detailed and valuable user feedback. And that's a really good point about the example this gives of the real automation situation in factories.

bobjengr
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ADHESIVES AND BMWS
bobjengr   3/5/2014 6:17:38 PM
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Ann, absolutely fascinating video.  I use adhesives on a daily basis adhering a metal bracket to a piece of tempered glass.  We use LOCTITE two-part 5600 for that assembly AND a LOCTITE promoter.  I am constantly amazed at the performance characteristics of the RTV being used.  Your comment about "tack time" is well taken.  We know if we do not install bracket on glass in under one minute we will have issues with separation.  By modifying the mixture ratio we could lengthen the tack time and had to find, by experimentation, a suitable set time relative to logistics of the process.  There were several things I noticed about the video.  These are as follows:

1.) Excellent and profound use of robotic systems.

2.) Compared to assembly in our country, very very few individuals working on the assembly lines. We could hear them in the video but "hands off" during processes.

3.)  Noise levels were extremely low.

4.)  Robotic systems were six-axis SCARA types.

I think every high school senior needs to look at this video to discover the factories of the future will not, for the most part, employ thousands of people.   They need specialized education, post high school and probably college, to survive in manufacturing if that's where they want to be.

Marvelous post. 

Ann R. Thryft
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Re: Using Adhesives to Create a Permanent Bond
Ann R. Thryft   2/14/2014 1:30:57 PM
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I didn't realize that either, NZgorski. What's interesting is that, either later in this video, or in another I saw, the assembly of the carbon fiber panels require some human application of adhesives.

NZgorski
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Re: Using Adhesives to Create a Permanent Bond
NZgorski   2/14/2014 1:25:11 PM
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You are absolutely right about the robotics. Before clicking on the link to watch the video I assumed there would be some robotics but never imagined the entire process handled by robots. 

Ann R. Thryft
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Re: Using Adhesives to Create a Permanent Bond
Ann R. Thryft   2/14/2014 12:58:54 PM
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NZgorski, isn't that video amazing? Among other things, it gives an indication of how sophisticated automotive manufacturing robots have become.
Thanks for the info on your company's services and a refresher on one side of the fasteners vs adhesives debate. We've discussed the topic several times in DN, and the answer seems to depend in part on the materials to be fastened/attached and the application. Degree of recyclability is also an issue that can affect the choice.

NZgorski
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Using Adhesives to Create a Permanent Bond
NZgorski   2/14/2014 9:48:10 AM
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That video was incredible to watch, thank you for sharing. You are right, the bond time for the adhesive seemed to be very quick and it's amazing how quick the entire process moves along.

At Strouse we die cut adhesives and foams for the automotive industry and just yesterday put up a new blog post on the advantages of using adhesives to replace fasteners and bond different materials. Just some of the quick advantages of adhesives over fasteners:
  • Lightweight so veheicles are more fuel efficient and produce less emissions.
  • Fasteners can leave materials exposed and corrode over time.
  • Adhesives also create less stress on the materials that are being bonded. It spreads the stress over the surface of the part where the adhesive is applied as opposed to the concentrated spots where fasteners are placed.

You can read more on our blog at MoreThanTape.com.

 

Thanks again for sharing, this was a cool video and I'll be sharing the post on our social media accounts.

 

-Nick

  

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