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Wringing

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Re: Wringing

#21

Post by jcims »

TeMPOraL wrote: post #14
greenyoda wrote: post #12

Earlier quoted context omitted.

The joined blocks can be pulled apart with you hands. See the first video posted in this comment: https://news.ycombinator.com/item?id=20366089 So the bond is not comparable in strength to gluing or welding.

I watched both. I know it's not comparable, but it seems plenty strong. In the case of the video, I'd guess if you'd double the contact surface, you could easily hang a coat on it. My question is, how long would the join last.

FWIW the Starret tips on maintaining gauge blocks says not to leave them wrung overnight.

Re: Wringing

#24

Post by jcims »

lqet wrote: post #2

If you (like me) read the entire article without really getting an intuition for these "gauge blocks", here they are in action: https://www.youtube.com/watch?v=gbsd2OpPOMw https://www.youtube.com/watch?v=2lOOl3VxOtE

Fun video from Sixty Symbols explaining the underlying forces at work - https://www.youtube.com/watch?v=mgL_qH70KAU

Re: Wringing

#25

Post by scottlocklin »

kohtatsu wrote: post #15

I feel like the article is missing a section on uses. Is it strictly measurement?

Guage blocks are for measuring things. The "wringing" thing has been used in optics for precision alignment for centuries, though nobody calls it that.

Re: Wringing

#26

Post by scottlocklin »

TeMPOraL wrote: post #8

I wonder how stable is such a "wring joint" over time and over mechanical stresses like temperature change and vibrations. Could you use this feature to e.g. attach stuff as a product assembly technique, as a temporary/non-destructively modifiable alternative to gluing or welding?

Cold welded optical components were a part of my ph.d. thesis (someone else did the wring joint trick). As far as I know, the bits are still wring jointed together after 20 years of abuse.

Re: Wringing

#27

Post by nas »

lqet wrote: post #2

If you (like me) read the entire article without really getting an intuition for these "gauge blocks", here they are in action: https://www.youtube.com/watch?v=gbsd2OpPOMw https://www.youtube.com/watch?v=2lOOl3VxOtE

This is a really nice video if you are interested in measurement precision for manufacturing:

Machine Thinking: Origins of Precision and first project introduction https://youtu.be/gNRnrn5DE58

Re: Wringing

#28

Post by nateburke »

This is part of the reason why you commonly see cymbal players in orchestras use an oblique motion for a crash rather than a head-on direct motion.

Bringing two symbols together directly along their axis of rotation risks getting them stuck together like suction cups--the crazy part is that even when holes are drilled to release the near vaccum between two stuck cymbals, they remain glued together by the forces described in this article.

Re: Wringing

#29

Post by russdill »

ndespres wrote: post #9

If you're interested in how gauge blocks fit into the history of precision engineering, a new book called "The Perfectionists: How Precision Engineers Created the Modern World" puts them into context, and presents a very interesting perspective on the events and developments that brought us into modernity. These blocks feature strongly into the industrial revolution. I strongly recommend the book! https://books.googl…

Or for the lazy, here's Destin https://www.youtube.com/watch?v=T-xMCFOwllE

Re: Wringing

#30

Post by nmstoker »

Edit: Oops - somehow missed the other post mentioning this book. Sorry!

These are covered with a charming personal story by Simon Winchester in his book The Perfectionists: How Precision Engineers Created the Modern World

It's reviewed here: https://bookmarks.reviews/reviews/the-perfectionists-how-pre...

and the audiobook as pretty good too.

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