The part above is from 1944 V2 plans which I am using as real world practice examples to teach myself 3D modeling using Inventor LT 2021. Therefore there is no original designer/engineer I could got to for clarification.
I know how I attempted to model this piece but I am not sure on the proper way to model this.
What I did
I started out by drawing up the section on the left in a 2D sketch and then added some cutting shapes.
I then revolved the large rectangle on the right side to generate a section straight pipe. I followed this up by extruding triangles at the top and bottom to generate the angled cuts.
I then proceeded to create a work plane on the face of the lower cut and proceed to added two shapes. The first to be essentially a plate to be extruded into the remaining pipe. The section a bounding box the extrude and remove material from the lower pipe that does not belong.
I then applied a 6 mm fillet to the inside edge of the added plate and pipe, followed by an 10 mm fillet to the outside edge.
The problem is the last and final step of applying a 15 degree chamfer to top face of the pipe.
What I tried
I tried applying a chamfer using the tool which was probably the closest result I got but it had a problem. The tool requires either fixed distance on both faces or a fixed distance on one face and an angle from that face. The problem is the width of the top face varies ever so slightly due to the angled cut through the piped. Since the 15 degree angle is relative to the horizontal plane, the depth along the side of the pipe also varies. Below is an endview of the problem.
I also tried creating triangle to cut out the required shape. I initially was going to revolve it, but that does not work as the path it need to follow is not circular. Then I thought about using the sweep tool and selecting the inside edge and tip of the triangle. However the resulting cut from that was not good at all. It was as if the triangle did not remain in its original horizontal position but got twist as it followed the path.
Setting up using the sweep tool
The blue line is the 15 degree from horizontal line from the sketch at the low end. Sweep has some serious issues relative to the desired output.
So the last thing I tried was loft. I made 4 sketches, one at each quadrant, and selected closed loop. The result were not good. The resulting shape did not follow the radius of the pipe when viewed on end. I even added a rail of the inside edge which improved things but still had problems.
I just forgot, I also tried a helix (coil) cut, but the path of the helix is not the same as the angled cut through the pipe.
Is there another way of generating this chamfer or removal?