Ive been asked to look into making a tool. It needs to do three things. The material is 35mm thin wall tube and what we want to do is flatten the end of the tube, punch a hole and cut the corners off the end. All this in one operation

While it might be possible, I think it would be better to use a two stage processs. Flatten the end and then pucnh the hole and trim the cornes in one process.