This week I was turning the tube
I spent a while doing small passes and learning the feeds and speeds for this part. I settled on around 400RPM at .007 in per rotation for roughing and ~ 350RPM at .002 for finishing.
I finished boring the ID on one half of the tube and then I turned the hole OD of the exposed tube down to 7.4 in which is the final OD of the flanges.
Then I flipped the tube around and re-centered it. This process took a very long time as I needed to get it within under 1 thousandth of an inch accuracy while maintaining all alignments.
After this I crashed the machine a little. but it was fine. that made me have to align the tube again which sucked and I also had to reduce the tubes final length by ~.030 in to clear the damaged area
During this whole process coolant has been leaking and spraying everywhere. It is really messy but I don’t have time to mop it up each day and it evaporates so I plan on just washing the floor after the tube is finished.
I then started on the other side of the tube getting the OD down to 7.4 in and working on the ID
When I am boring I can’t really clear the chips so I have to do a very specific depth of cut for the chips to not jam up between the tube and the boring bar. I have to do exactly 0.01 in depth of cut.
