#1
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Frame Stiffness calculator
I can't seem to find the frame stiffness calculator. I thought it was posted???
Or has Richard Ferguson's spreadsheet been posted??? (Kerry talked about it in his build diary.) Working on my "group build" shrinker. I have a bunch of 5"x7"x1/4" tubing. I can run the tube 7" on the vertical because the pillow blocks I bought are tapped (no ears). Just need to know how deep of throat I can build. Also, I know that everyone seems to just stack their tubing at 90 degrees (except for the lower tool holder). What about a C-frame like most top-adjusting E-Wheels?? It would be for no other reason than to match my E-Wheel frame . My wheel frame is 26" throat but I really can't see the need to build a thumbnail shrinker that big... or can I???
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Christopher Rathman Chris' Autobody Restoration Service |
#2
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In my opinion 10" is already too much, I dont think I ever remember using it all or wishing I had more. I have gone that deep on the Yoder though...
Marty
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Results = (Effort X Determination2) + Time |
#3
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You really can't use thumbnails much over 6-8 inches in. At least I've never been successful. 5x7 will do a 10-11 inch throat fine. You could make it in a C shape but it's harder to deal with the motor mounting and with such a small throat it's just not worth it imo.
I'll look for the calculator.
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Kerry Pinkerton |
#4
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I guess I was thinking of copying the shape and tubing of my E-wheel just so the machines look similar.
I used this drawing (I think it's one of Anders drawings but apologize to the artist if I am wrong.) englidh wheel frame.jpg I'm not sure how that would look shrunk down to <12" of depth....... Time to get out the crayons I guess
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Christopher Rathman Chris' Autobody Restoration Service |
#5
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Hi Chris
Is this what you were looking for http://www.allmetalshaping.com/showthread.php?t=681 Cheers Chris C
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Chris cant This site is only GREAT because people contribute , Show your project and ask for help because that will help all of us. |
#6
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Quote:
That would be it! Thanks!!!! Edit: That is the spreadsheet but it's a Read-Only spreadsheet. I thought there was one posted that a guy could enter their tubing and frame size to calculate stiffness. Then it could be compared to other wheels.
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Christopher Rathman Chris' Autobody Restoration Service Last edited by CARS; 05-17-2010 at 01:27 PM. |
#7
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You should be able to use "Save As" to save it after editing. At least it worked that way on my PC........Bill
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.................Bill |
#8
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Thanks Bill. Yep, that works!
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Christopher Rathman Chris' Autobody Restoration Service |
#9
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OK, now that the computer user issues are resolved
A 12" throat (and I know I can't shrink in that deep with thumbnails) with 5x7 tubing is 297.8 Vertical and 175.7 Horizontal. Beyond stiff if 200 was the original "target" in the group build. (my E-wheel frame came in with 29.3 Vertical and 17.3 Horizontal. Yeah!!)
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Christopher Rathman Chris' Autobody Restoration Service |
#10
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Quote:
As you say, the metal doesn't care what the tool looks like! (paraphrasing)
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Christopher Rathman Chris' Autobody Restoration Service |
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