9601
Show"N"Tell ( Your Machines) / Re: Just got a lathe to retrofit
« on: January 22, 2012, 02:10:50 PM »
My friend brought through the rough cut turret plate, I was pleasantly surprised with how good it was. He had said it was the first time they had cut 60mm thick steel and it had wandered a bit (normally its glass they cut with the water jet), it wasnt too bad and as I had allowed 5mm extra on all dimensions I had given him it is well within spec, kind of wish I had only allowed 2mm now
I had also managed to include 8 drill/bar holders in the dxf I gave them and they too came out above my expectations
First job will be to chuck up the plate and face and counterbore the back so that I can fit half of the curvic coupling in, I will then mount the other half on the milling table and this will allow me rough out the slots and then for the final cut to size I will only move in 1 axis with a 40mm cutter and cut to size each slot in turn, rotating and clamping the turret on the coupling each time. This should make things very accurate as the coupling is extremely accurate. I measured it today and when both halves are clamped there is exactly 32.10mm measured over the thickness of the two halves and that is no matter where I measure or whether I rotate and clamp again, so its a nice coupling. Outer diameters are also exact and line up perfectly to each other so that the edges of them have no difference at all.
Once I have the plate made I intend to make the body of the turret and face the bottom and front true to one another, I will then fit the coupling to that and sit it on the milling table and clamp the turret in the upright position. I will then be able to drill the holes and mill the keyway for the drill/bar holders one at a time, rotating again on the curvic for each one, again this should make things very accurate.
Once the turret is made and fitted to the lathe I will then use the lathe itself to bore out the holders to the 40mm dia. I have a 39mm U-Drill that I will place in the chuck and once done I will then put in a boring head and adjust that to exactly 40m and hopefully that should work well and mean drills and boring bars will be exactly on centre.
Hood
I had also managed to include 8 drill/bar holders in the dxf I gave them and they too came out above my expectations
First job will be to chuck up the plate and face and counterbore the back so that I can fit half of the curvic coupling in, I will then mount the other half on the milling table and this will allow me rough out the slots and then for the final cut to size I will only move in 1 axis with a 40mm cutter and cut to size each slot in turn, rotating and clamping the turret on the coupling each time. This should make things very accurate as the coupling is extremely accurate. I measured it today and when both halves are clamped there is exactly 32.10mm measured over the thickness of the two halves and that is no matter where I measure or whether I rotate and clamp again, so its a nice coupling. Outer diameters are also exact and line up perfectly to each other so that the edges of them have no difference at all.
Once I have the plate made I intend to make the body of the turret and face the bottom and front true to one another, I will then fit the coupling to that and sit it on the milling table and clamp the turret in the upright position. I will then be able to drill the holes and mill the keyway for the drill/bar holders one at a time, rotating again on the curvic for each one, again this should make things very accurate.
Once the turret is made and fitted to the lathe I will then use the lathe itself to bore out the holders to the 40mm dia. I have a 39mm U-Drill that I will place in the chuck and once done I will then put in a boring head and adjust that to exactly 40m and hopefully that should work well and mean drills and boring bars will be exactly on centre.
Hood