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  #11  
Old 04-05-2011, 09:51 AM
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Kerry Pinkerton Kerry Pinkerton is offline
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Quote:
Originally Posted by ShawnMarsh View Post
There's no right or wrong way Bob, if you get the results you are looking for then you are doing it the right way. This is just one way of doing it.
Shawn is 100% correct Bob. There are an infinite number of ways to get the final shape you want. What way you choose if a matter of skills, tools available, and, most important, HOW you want to do what. You can get the exact same shape 3 ways:

- All Stretch
- All Shrink
- Combination of both

They will all LOOK exactly the same but the difference is in the metal thickness at various points. For bowl shapes, all stretch results in thinner centers (usually) while all shrink has thicker edges and original thickness in the center. Combinations will usually be a bit thinner in the center and thicker on the edges.
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  #12  
Old 12-20-2013, 09:19 PM
tech69 tech69 is offline
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thanks for taking the time to do this!
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  #13  
Old 12-21-2013, 02:55 PM
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Default Tuck Shrinking details for new Metalshapers

I had a tear in my eye reading this post.
R.I.P Ken.
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  #14  
Old 12-21-2013, 06:24 PM
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HEATNBEAT HEATNBEAT is offline
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You and me both
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  #15  
Old 12-21-2013, 06:55 PM
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Always feel very sad, when I see one of Ken's posts. Come up.
He is very much missed, on here.
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  #16  
Old 12-21-2013, 08:36 PM
tech69 tech69 is offline
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oh man, I'm terribly sorry for the loss. I wouldn't have commented had I known. RIP.
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  #17  
Old 12-21-2013, 08:49 PM
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oh man, I'm terribly sorry for the loss. I wouldn't have commented had I known. RIP.
That's OK everything has its reason. Maybe he just wanted to say Merry Christmas to us all!
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  #18  
Old 12-22-2013, 07:53 AM
Irrational Metalworks Irrational Metalworks is offline
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He is still giving back to the metalshaping community! Awesome
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  #19  
Old 12-22-2013, 11:40 AM
tech69 tech69 is offline
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I also would have never found this site if not for this thread. I originally googled a tuck shrinking question and it triggered this thread.
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  #20  
Old 12-29-2013, 04:00 PM
Tom Walter Tom Walter is offline
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I'm hesitant to post, so bear with me.

I took Kent's class last year with my son. We had a blast, but one goal with aircraft parts is I need to shape them by shrinking. Stretching is much easier, but the metal keeps getting thinner.

I dived in, but soon realized my ortho doc would be making a whole bunch more money on me. No longer 18, but at 55 have had enough joint issues that I avoid repetitive injuries. I can swing a hammer for an hour, but that is about it. Very little progress in shrinking that way.

Practice piece (smaller portion of that nose bowl in the back ground, just to get the hang of it).

Tuck is formed by bending, forming a peak, and the sneaking up on it from both sides. That is a small tuck, I did some huge ones and kept thinking I would make a mess of things.

About two hours (I'm slow, and still have lots to learn). It just felt good to be able to shrink something, and not have to reach for something for pain and swelling. I'm about due for another knee, but if I can keep shoulders, elbows, and wrist from damage.... that Air Hammer will pay for itself in a short time!

edit: sheet metal micrometer. Started at 0.040" -- about 0.044" around the edge. It varied 0.042" to 0.045".... still pretty interesting, bowl is only done with that one die set in the photo. It was worked quite a bit, but haven't annealed it.

bowl_shrink2.jpg

bowl_shrink.jpg

bowl_shrink3.jpg
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Last edited by Tom Walter; 12-29-2013 at 08:15 PM. Reason: "bear with me" -- I had used "bare with me". :)
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