ROTATING BENDS
ROTATING BENDS
(OP)
IF I HAVE A 30 DEGREE BEND IN THE HORIZONTAL I AND BEGIN TO ROTATE IT DOWNWARDS TOWARDS THE VERTICAL. THE 30 DEGREES BEGINS TO REDUCE AND CONSEQUENTLY THE VERTICAL BEND ANGLE BEGINS TO GROW.
IS THERE A CALCULATION OR PROGRAMME WHICH CAN HELP ME FIND OUT THESE VALUES.
THANKS
IS THERE A CALCULATION OR PROGRAMME WHICH CAN HELP ME FIND OUT THESE VALUES.
THANKS





RE: ROTATING BENDS
Per your example, rotate your 30 degree bend by, say, 20 deg downward:
Horizontal Angle = (30 deg) x (cos 20 deg) = 28.2 deg
Vertical Angle = (30 deg) x (sin 20 deg) = 10.26 deg
Readily adaptable to a spreadsheet.
www.SlideRuleEra.net
RE: ROTATING BENDS
There are fairly close but should be the same - any ideas. The maths is correct like you say.
RE: ROTATING BENDS
Let R be the rotation angle
Let Ha be the apparent horizontal angle (viewed from above)
Let Va be the apparent vertical angle (viewed from the side)
tanHa =tanB*cosR
tanVa =tanB*sinR
20 deg rotation:
tanHa =tan30*cos20=0.577*0.9397=0.536 (Ha=28.19deg)
tanVa =tan30*sin20=0.577*0.342=0.197 (Va=11.17)
RE: ROTATING BENDS
RE: ROTATING BENDS
cos*=cos A cos B cos C +(if grade in and grade out has one above horizon and one below horizon)-(if both above or both below horizon ,example grade in -5%grade out +8% or grade in +5% grade out-6%)sinA sinB ,then you can calculate the roll for this bend to get the proper vertical angle and grade.its a common calculation when working out the stell pipe mitre cut bend fabrication.
RE: ROTATING BENDS
RE: ROTATING BENDS