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It is currently Tue Nov 05, 2024 11:38 pm
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[ 5 posts ] |
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"Cope cut" layout in large diameter pipe
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Woodscaper
Official CCB Member
Joined: Fri Nov 19, 2010 11:16 pm
Posts: 587
Location: Lakewood/Green Mtn.
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 "Cope cut" layout in large diameter pipe Anybody have short cuts on layout and cutting a 90 degree cope/saddle cut in a 20" diameter .250 wall pipe?
I have the cutting tools, just need layout advice.
Thanks.
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| Wed Apr 08, 2015 7:26 pm |
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JGZ
Official CCB Member
Joined: Sat Oct 23, 2010 3:20 pm
Posts: 393
Location: Pueblo West
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Re: "Cope cut" layout in large diameter pipe Cut out a 20" circle on poster board ,lay that down and trace it.
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| Wed Apr 08, 2015 9:19 pm |
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Dirtheadz
Official CCB Member
Joined: Thu Jan 27, 2011 9:27 pm
Posts: 929
Location: Colorad Springs
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Re: "Cope cut" layout in large diameter pipe I thought their used to be a formula for large pipe, something like 1/4 of the diameter. Hell... I really did drop out & become a statistic, when I thought I wanted to be a mechanical engineer.
_________________
!!! Being original is a blueprint for followers !!!
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| Thu Apr 09, 2015 2:37 pm |
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Woodscaper
Official CCB Member
Joined: Fri Nov 19, 2010 11:16 pm
Posts: 587
Location: Lakewood/Green Mtn.
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Re: "Cope cut" layout in large diameter pipe Here is a formua:
X = (R1/Sin (JA)) - (((R1 - Sqr(R1^2-(Cos ( AP ) * R2)^2)) / Sin(JA)) + ((Tan (90 - JA) * (Sin(AP) * R2))))
R1 = large radius
R2 = small radius
JA = Joint Angle
AP = AnglePosition
I also found a method of laying out a pattern.
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| Thu Apr 09, 2015 4:31 pm |
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Unaweep
Official CCB Member
Joined: Thu Sep 12, 2013 3:02 pm
Posts: 291
Location: Grand Junction, Co.
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Re: "Cope cut" layout in large diameter pipe You can purchase paper templates at your welding store, they aren't expensive and will last a lifetime and work on many sizes of tube/pipe and various degrees/angles.
Erik
_________________
1969 Ford Bronco with: 351W, Q-Jet, ARB front locker, 3" Suspension lift, NP435 transmission, 33" Goodyear's, roll cage, body rough.
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| Sun Apr 12, 2015 8:40 am |
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