Hi Drew,
Frank is right that it is often best to model what you want then have the machining folk work to that however there are always exceptions where you want to simplify the overall process by making your model more complex.
For this type of compound machining I typically use surface modelling to build up the cut then use the resultant quilt to cut the material away from the part as if it is the cutter.
To start your surface geometry you could make a tilted set of datums somewhere long the trajectory (you could base these on an offset cys) and on the plane that represents the true rotated bottom of the cutter make a sketched circle to represent that. You then use the edges of this tilted circle to make the trajectory extrusion (or sweep) along the line of your cut and this will have to be longer than you need at both ends. You will need to make more surfaces to define the ends of your cut and then merge all the surfaces together to form a final cutting quilt.
Sounds more tricky than it is but you do need a good head for how things sit in 3D pace to get it right otherwise you will cause more problems than you are attempting to solve.
Hope this helps.
Regards, Brent Drysdale
Regards, Brent Drysdale
Mechanical Designer
Tait Electronics Ltd (www.taitworld.com)
New Zealand
Ph. +64 3 358 1093
Drew Osborne wrote:
I am trying to model a milling operation in which the milling cutter is tilted (not normal to travel direction); I need to create the correct surfaces on the workpiece;since the cutter is tilted, the cutangle (now not equal to included angle of milling cutter - it increases) changes as well as the radius at the bottom of the cut.
I would appreciate any help anyone can provide.
Thank you.
