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| Making rectangular plate in to a round plate on the mill. |
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| DeereGuy:
Well gang, I am finally getting around to posting a small project I did for Weston. I won't tell you why he needed this. That's his job when he gets ready. :) Weston had handed me a piece of 1/4" plate rectangular in shape and ask me if I would make it round for him. I, of course said, "you bet". I thought about first trimming the corners off to make an octagon shape to start out, then take it over to the lathe. Then I thought....hey I can use my face plate on the mill :beer: So that's what I did. The rotary table was already zeroed from the last part I did so I was able to skip that step. Starting out by clamping it first to the faceplate so I could drill two holes to put 2 bolts through then I set the edge of my end mill .02 outside of what I wanted for a final dimension I began to make my roughing cut. I used carbide 3/4" fine toothed roughing mill and started to take a .250 deep cut. I went as far as you see here and decided I needed to back it down to .100. Here is a shot of the finished rough cut. I placed in a regular ¾” end mill to make take it to the final dimension. I don’t know about you guys but I have found that the side cut of a rough cut end mill is really rough…..hmmmm…..maybe that’s why they call it “rough cut” :beer:. Here is how the part turned out. Weston picked the part up from me this evening and will continue on later with the saga of this now round object.)…Stay tuned. |
| Bernd:
Nice one Bob. This works great if you can put holes in the round part, but dosen't work good if you can't. Still it's a neat idea. How the heck would you have held that part in the lathe anyway? With a faceplate? Same as on the mill? And then again it'll only work if you can put holes in the round part or do you have a secrete way of doing it? :D Bernd |
| bogstandard:
If you are very careful Bernd, you can friction turn large round parts without having any holes in them. Very similar to how I turn flywheel blanks, but instead of putting a centre drilling in the part, you make up a block with a centre drilling instead, and use that between the rotating centre and the part to be turned. Bogs |
| John Hill:
In my limited experience I have already discovered that it is important when turning a disc from a plate that the outer piece being seperated from the disc is firmly attached to the face plate. I have a nice steel pretzel to remind me of that lesson. :coffee: |
| DeereGuy:
Luckily in this case I could drill the holes. If I couldn't have then I would have made my first attempt at doing it with two sided tape and a tiny center point to use the live center in the tail stock. Also I would have trimmed most of it off with the band saw leaving very little to do on the lather. The cut would have been light and I would have spent a whole lot more time doing it. As it is I have about 20 minutes start to finish. Oh..yea and very low rpm until I had it completly round..then maybe kick up the rpm some... |
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