Vectric Customer

I have a customer wanting me to cut a circle template for him that he will lay on a curved metal tank that will give him a perfect circle to insert a round pipe into the curved tank. I know the template will be an oval for the distortion of the circle across the curved surface. Does anyone know if Aspire has a gadget for this, or know of a formula for calculating the size of the oval template.
Thanks in advance,
Bob III

A few drafting tricks, the measuring tool, and the resizing tool can create the flat oval shape you'll need. If you can post the diameter of the two pipes I'll post a file of how I would do it. Does the smaller pipe intersect at 90 degree and centered on the larger pipe? If not then the angle and intersection point will be needed.

4D

Try this tube notching template generator.
http://www.blocklayer.com/pipe-notching.aspx
It should allow you to cut a dummy pipe with the correct edge profile on it, then he can scribe the exact shape needed for the penetration hole.

If the intersection is on center and at 90 to the target tube you will get an "oval" shape. Otherwise, you get all sorts of other shapes. Like the following:
This is from a program I wrote about a hundred years ago or so. Notice that there are TWO intersections, one on the outside and one on the inside. If he is inserting a tube then welding he may actually need the INSIDE intersection, not the outer. Here is why:
BTW, the program was for rotary axis cutting on a laser. Normally a LOT more segments are generated, but I cut it down so we could see what is going on.