Milling a semi-hemispherical socket

thank you nice Brown here welcome back to the shop we've got a little bit of a different project going here today we're gonna do some complex milling semi complex milling this is one of the leveling screws from the GL and they're supposed to be made with a spherical surface so Mendham so we've got a radius on here and then it's supposed to sit on washers that are flat where they sit on the floor and then their spherical and thus any alignments that are out when this draws down it doesn't try to torque it over and deflect you know just draw into the washer and itself a limes basically so it's a it's a self aligning bushing I don't have a radius turner for my lathe so I'm gonna cut this spherical shape on the mill so first thing I need to do is kind of Turman what radius is on here so I'm gonna take in there to the optical comparator and see if it can't kind of estimate what that is and so let's go take a look at that and then I'll get this machine set up and I'll see if it can cut that successfully do some spherical milling it's a bit of an interesting thing I don't know I've seen anybody do that before on YouTube so that should be a good one okay so I don't think it shows up real good on this camera it's too dark in here but you can make out the thread here on the bolt and I've got the the radius out here lined up that's pretty much right on the edge of this chart no thinking man you can see the grid lines on there but you can't read them so I'll uh I'll turn lights back on and see what this says okay so here's our formula for setting this up we've got the cutter diameter divided by twice the desired radius is equal to the sine of the angle to set the cutter head so we have four-inch cutter divided by 2 times 6 radius and it's about 19 degrees it's close to 19 and a half but I'll go if 19 cuz this cutter is probably a little bit less than 4 inch so that'll help to increase the radius so we'll give that a try and see what it looks like so I'm gonna get this set up and I'll bring you back okay so I'm not gonna lie to tell you they went perfect it didn't work at all I don't my radius measurements wrong and I said I wanna bring Brady's gauges compared to toward telling an optical comparator so could have butchered that or made that form and I used wasn't quite right but according to the book I got it out of it was anyway so I've completed one of my not so favorite tasks here and I've got the rotary table up in the mill just in case anybody wants to know in case they need to make it later I've got this head set at 60 degrees with a two inch cutter and it's cutting the radius it looks like it matches pretty good I've done one so we'll let you watch the second one here need is a low profile height in order to clear my cutter here especially when I got smaller diameter so what I've done is just taking regular clamps and I've turned them around and I'm using the ledges to catch the plates and hold them down so they're pulling down and there octan good so this should hold it in place and give me good clearance might be a trick for you sometime you can use for setups that's I don't do much vice work so this is kind of the way I'm used to holding stuff so I'm gonna fire the middle up so the sound of quick because you won't be able to hear anything with it running and so he cut one of these okay so a battery died last time third time's the charm got this fixture down here with my toe clamps catching them on the ledges works good keep this low-profile decides that I want to run my cutter at 42 degrees seems to be a good match so I'm guessing there must be a inch and a half radius all that not three inch so may isolate I hope I had a if the lens is a 5 X instead of 10x or nice and rewrite but anyway the math part should be correct assuming you actually know what radius you're working with but let's get this mill fired up and cut this thing all right there it is got a pretty good finish on it okay or maybe you can see better cut the cool-looking swirl pattern in there so got a nice little ball socket where's our lesson perfect screw end works been on flat and they've damaged it better fits in there nice and just rock it dude around wherever so that way when this is when this is on the ground if there's misalignment yeah it's a Mills sitting like this it's the concrete's not level when this pulls down it it doesn't try to twist it whereas if this was on a flat ledge it's going to try and straighten the bolt so when tries to straighten the bolt it's going to put twists in the machine and make it inaccurate so with this method here it's free to move and self aligned when it's drawing up so go like 40 of these to make not too bad it doesn't take terribly long to do one of these I mean you just watch that real time so yep but there's an interesting deal you don't see this is what I would call complex work for a manual machine you don't see a lot of spares milled or hemispheres so that's it thanks for watching thanks for subscribing I'll catch you later

Channel: bcbloc02

Views: 21,133

Rating: 4.975945 out of 5

Keywords: mill, milling, machine, form, cut, cutting, metal removal, cincinnati, cincinnatti, calculating, optical, comparator, shop, steel, rotary, table, 4th, axis, shape, sphere, hemisphere, semi, spherical, hemisphereical, cutter, ball, socket, how, to, giddings, lewis, self, align, aligning, radius, plate, washer, finish, shiny, nice, g&l

Id: rAIADppnrh0

Length: 14min 6sec (846 seconds)

Published: Thu Oct 13 2016