Angular Dimensions
Angular Dimensions
(OP)
I am new to Solidworks. I am using the 2016 edition.
I am trying to locate holes in a circular flange. When
placing a bolt hole near the edge, the linear dimension
are active. I could figure out the X-Y coordinates but
I would like to use the radius and an angle to locate
the first hole. How do I do this?
Thanks.
I am trying to locate holes in a circular flange. When
placing a bolt hole near the edge, the linear dimension
are active. I could figure out the X-Y coordinates but
I would like to use the radius and an angle to locate
the first hole. How do I do this?
Thanks.






RE: Angular Dimensions
Chris, CSWP
SolidWorks '16
ctophers home
SolidWorks Legion
RE: Angular Dimensions
RE: Angular Dimensions
- - -Updraft
RE: Angular Dimensions
Yea, about those tutorials....my company computer is restricted from accessing many of the tutorials.
But I'll manage somehow!
RE: Angular Dimensions
RE: Angular Dimensions
Ive done quite a lot of flanges in my lifetime and typically I dont use any wizard hole features when making the thru holes
I use wizard features on fancy schmancy holes like NPT or BSP or countersinks and counterbores
I just do the following:
Open a sketch, draw a bolt circle using construction line font and add the dimension for the bolt circle
Draw a construction at an angle to the vertical that intersects with the bolt circle
Dimension the angle
Then I use the endpoint of that construction line to draw a circle and dimension that circle the necessary clearance size for the bolt.
I next extrude cut that circle and pattern the resulting hole to match the required hole spec
Finally I adjust the angle to get the holes equally straddled about the vertical centerline.
I do it this way to match industry standard ways of specifying and measuring flanges.
Most vendor cut sheets give you bolt circle diameter, hole diameter and quantity of holes so its easiest if you make those the actual dimensions in your sketch
I you work in a welding shop they will also need the straddle center angle, because most flanges are installed that way
The X-Y dimension method is more used in a machine shop where you might be setting 0,0 and need the coordinates if machined holes for CNC tooling
If you have to use a hole feature, you can usually right click on its sketch and redo it in the manner above.
Hole features often have 2 sketches on for the location as described and another for the revolved shape of the hole.
Hope this helps
Adrian Dunevein
AAA Drafting Services
www.aaadrafting.com
RE: Angular Dimensions
I draw line sketches to locate my holes, most of the time. For pitch circles, look for the polygon tool, and use that.
--
JHG