MadModder
Gallery, Projects and General => Project Logs => Topic started by: DeereGuy on August 20, 2009, 07:48:06 PM
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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
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00198-20090816-1253.jpg)
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.
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00200-20090816-1334.jpg)
Here is a shot of the finished rough cut.
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00201-20090816-1402.jpg)
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.
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00204-20090816-1515.jpg)
Weston picked the part up from me this evening and will continue on later with the saga of this now round object.)…Stay tuned.
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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
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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
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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:
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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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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
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00198-20090816-1253.jpg)
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.
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00200-20090816-1334.jpg)
Here is a shot of the finished rough cut.
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00201-20090816-1402.jpg)
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.
(http://i2.photobucket.com/albums/y39/Deere_X475guy/Machine%20Shop/WestonByeRoundPlate/IMG00204-20090816-1515.jpg)
Weston picked the part up from me this evening and will continue on later with the saga of this now round object.)…Stay tuned.
What size is your rotab? It's a Grizz...I can tell that by looking. It looks just like mine. :D
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It's a 6 inch that I bought used about 5 years ago and I have no idea who the manufacturer is.