Rectangular Duct Flange Configuration
Rectangular Duct Flange Configuration
(OP)
Good morning to everybody. I have a question about configurations. I am trying to build a rectangular flat duct flange to weld onto the end of a piece of HVAC ducting. My customer specs that I must pre hole the flange for him, and the max centerline distance between holes cannot exceed 2". The holes must be evenly spaced along the edges. What I cannot remember how to do, if it is even possible, is to create a rule, that if the spacing is larger than the 2" it adds another hole to compensate. I will be build a large number of these in many many numerous sizes, and was hoping to use a Excel based design table to handle the sizes. I can email a model if anyone wants to see. I am currently using Solid Works 2007. I have uploaded a model of what I am attempting. I have the basic design with the center holes on the "X" and "Y" axis, but now need to pattern the rest.
Thanks,
Rob
Thanks,
Rob






RE: Rectangular Duct Flange Configuration
You would need two equations. The first calculates the number of holes based on the length that has to be filled. This would be 1 plus the length divided by max spacing rounded up to the nearest integer. The second equation is gives the spacing, and it is the length divided by 1 less than the number of holes calculated in the first equation.
-handleman, CSWP (The new, easy test)
RE: Rectangular Duct Flange Configuration
-handleman, CSWP (The new, easy test)
RE: Rectangular Duct Flange Configuration
The samples are in SW08, but I pasted the equations used on the parts so maybe you can follow the logic behind them. Basically it used If statements with a Like thrown in for good measure.
h
Flores
RE: Rectangular Duct Flange Configuration
-handleman, CSWP (The new, easy test)
RE: Rectangular Duct Flange Configuration
-handleman, CSWP (The new, easy test)
RE: Rectangular Duct Flange Configuration
RE: Rectangular Duct Flange Configuration
Thanks,
Rob
RE: Rectangular Duct Flange Configuration
27 Feb 09 11:34
Take a look at the Fill Pattern function. It will do what you want without the need for equations.
I tried the fill pattern, but it did not seem to do the trick.
RE: Rectangular Duct Flange Configuration