How to square up stock on the milling machine

one of the most common machining operations on the milling machine is squaring up stock every pretty much every part you make on the mill starts out as a rough sawn piece of material needs to be squared up and machined to size before you can really get started on the cart so what I'm going to do here today is spur up this rough selling piece of aluminum I show you how I do it first thing I do is pick the largest side and use that as my reference surface that's the part I'm going to machine first I'll set it on a parallel parallel to support it then I use a piece of aluminum welding rod place between movable draw the Chuck and the rough sawn surface on the part take up any irregularities we'll just clamp it in go ahead and machine the top surface of the part trying to take any more material off the necessary so you don't run the risk of running out of stock before the curt's - sighs now we have one flat surface rest of America sod one machine surface we're going to use that as our reference so for this demonstration I'm going to go ahead and Mark that surface one this will keep track of it so the next thing I want to do is machine another surface at a right angle to this first surface so take our reference surface put it against the solid jaw the vise again we'll have to use a welding or piece of wire or something soft between the sod surface and the movable jaw the vise can use a piece of wood or wire aluminum wire in this case whatever you have available okay now I'll go ahead and machine this surface flat so now we have a two surfaces machine on the block the right angle 90 degrees to each other okay I'm going to mark this second surface I just machined is number two again just keep track of it okay now do the surface opposite the side number two keep keeping my reference surface against the solid draw the vise I'll just rotate the part around with the number two surface down it's the Caroline and who's the wiring annex we're still clamping on a rough sod service now we have a machine surface down against the parallel so we want to hammer the block down so it's tight and the parallel I like to use a ball peen hammer just hold the part when you tap it you can feel when it sets solid and the pearl now we'll go ahead and machine this surface all right now we have our original reference surface and two other surfaces a machine to the right angle to it now the time you want to step in and measure the part see where you're at across these two finished surfaces they were at one inch ninety five thousand so now let's say I want to take that down to an inch put it back in the truck using our wire as before back in twice excuse me hammered down tight now we'll set the dial on the ZX is a table to zero if they caught ninety five thousand so I'll move it up about 90 yeah say about eighty-five we'll leave ten thousands per finish cut that was a five now we'll bring it up to 95 this is our finish cut ideally should always say one roughing and one finishing cut you have to take more than that got too much stock in the part or you up too much stuck on the mark the whole idea of sauna first get it close enough so you mistake one dropping one finishing car now we should be down to an inch okay within a half thousand and now we have our original reference surface and two other surfaces 90 degrees to that and the proper dimension you notice I'm only using one parallel here but it's because the part is so small was a larger part I'd used to but in this case it's it's pointless okay at this point I'll put the original surface down against the parallel clamp on surface two and three since we again have a machine surface down we'll want to tap okay first of all we don't need to use the wire anymore because we have machined surfaces on both jaws so now we just tap setting tight parallel shouldn't be shouldn't be able to move once it's tapped down we'll clean up this surface alright now as before if we wanted to take this down to finish size we'd measure it move our table up the right dimension and cut this surface again but I'm going to skip that part for now just in the essence of time we'll move on to the last two surfaces okay now we want to go back to put our original reference surface against the solid draw device and take your salad square set it on the parallel and square up off off the number two surface the second surface always want to work off the lowered number surfaces okay now we're square root of the vise jar the salad draw the vise we're square root of the parallel so we can go down and clean up this sports surface here I never get close got spiders surfaces machine nice and square all right for the last one again keep that original reference surface against the solid jaw rotate part 180 degrees hammer it down against parallel try to keep your fingers not always possible we have this surface hey now we'd want to go ahead and get for a real part we want to take it down to the right flank so we collect measure this these two surfaces we just ashamed and leave the table up the required amount take it down to size but in this case I'm going to skip that because I just want to show you basically how to square up the part that's it you

Channel: Toms Techniques

Views: 380,058

Rating: 4.8031139 out of 5

Keywords: squaring, milling section, square, stock, machining, machinist, processes, techniques, how to, turning, milling, lathe, mill, threading, thread cutting, South Bend, Logan, Clausing, Delta, Sheldon, Atlas, Bridgeport, Starrett, Lufkin, Mitutoyo, instructional, tutorial, educational, metal, metalworking, shop, machinery, tubalcain, millwork, facing, drilling, grinding, grinder, Harrison, hardinge

Id: igfqYZPdQ78

Length: 10min 21sec (621 seconds)

Published: Tue Jan 03 2012