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Post subject:frustrum forming on slip rolls
 Posted: Mar 22, 2005 - 05:35 AM #2780
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Joined: Mar 22, 2005
Posts: 2
Location: victoria B.C. Canada
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| I would appreciate tips on how to produce a frustrum on slip rolls. The frustrum has a base diameter of about 4 feet and a top diameter of about 3 feet. |
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Post subject:RE: frustrum forming on slip rolls
Posted: Mar 22, 2005 - 11:39 AM #2781
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Pro Tinner
Joined: Dec 14, 2004
Posts: 201
Location: Illinois
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One side of the slip rolls is adjusted tighter than the other to compensate for the different circumferences. Try to roll it so the vertical dimension is perpendicular to the rolls, this will keep the ends of the part flat, square and parallel to each other. Try it with something smaller in scale and you will understand.
It does not take much of a difference in adjustment. |
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Post subject:RE: frustrum forming on slip rolls
Posted: Mar 22, 2005 - 11:47 AM #2782
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Moderator
Joined: May 13, 2003
Posts: 1354
Location: Waukesha
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You can make your self two separate quarter templates, one at a radius of 18 inches and one at a radius of 24 inches. You’ll have to set the rear roller at one end so that it is closer to front (lower) roller then the other, you’re going to have to tweak this to the correct distance by practicing on scrap and using your ¼ template.
There is a good article in the library on slip roll machines.
http://www.thesheetmetalshop.com/pdf_ma ... orming.pdf
Good luck and let us know how it worked out for you. |
_________________
"If you make your job important it is quite likely to return the favor" Author Unknown
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Post subject:RE: frustrum forming on slip rolls
Posted: Mar 23, 2005 - 02:53 AM #2786
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Pro Tinner
Joined: Sep 16, 2003
Posts: 213
Location: McEwen, TN.
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What gage metal & what height ? A light ga. metal might not require roll forming.The larger end is 12.56 ft. in circumference.
bordontn |
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Post subject:RE: frustrum forming on slip rolls
Posted: Mar 24, 2005 - 06:29 AM #2790
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Joined: Mar 22, 2005
Posts: 2
Location: victoria B.C. Canada
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| The material to be formed into the frustrum is expanded metal C 1/2 16 F. |
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