HOW TO SQUARE UP BLOCKS ON A MILL

[Music] everybody it's phil kearny tool-and-die guy and as promised i'm gonna tackle some of your issues that have been sent to me when i asked you to send me what you need help with and one of my members Bob wanted to know a few tricks for squaring up blocks and he's having trouble getting them to come out right on his mill now as you can see I've got a grinding vise here same principle apply on the mill and at the end of this video I'm gonna show you some blocks I squared up the other day it came in to me see I'm kind of lucky at my shop they supply a lot of stuff to eat but to me because we have a blancher grinder they Blanchard stuffed flatland two sides for me but occasionally they don't so I would assume you guys don't have a blanch your grinder and you need to square up a piece of material well here's the steps to do it and by now you guys all know my forte is is milling and you know as a mold maker it built a lot of the molds on CNC equipment 3d stuff course before that we were tracing the work you know 3d machines duplicators but milling is my bag and first of all you gotta understand getting a block perfectly square out of middle you know it's a lot of time and if somebody handed me this block today and said this has got to be perfectly square I'd square it up in the middle as closely couldn't I take it to a precision grinder can't service grinder and really square it up but Bob is complaining that no matter what he does when he puts in his face and again he's using a nice curt vise and that's a good vice he can tell when he's tightening and tightening the jaw it's kicking up while I means it's out of square so here's the tried and true method here's how I've been doing it for 35 years and this is how I was taught so you gotta block somebody hands you and let's say it's hot roll it's all rusty and everything first thing you do you you got a skimming the biggest side first okay it's the biggest area so what what I would do is on my milling machine I would put this in my mouth in my vise lock it down and take a skim cut over this side okay now we've got one side flat the trick is on the next operation you take that side take a magic marker put an X on this is what you need to remember this side you're going to put that up against your jaw your fixed jaw once it's against a fixed job we're gonna introduce a role here okay and this is just a piece of cold roll half-inch diameter and I've got a couple pieces of this at work they're much longer than this and you want it to be about halfway up the vise jaw and you're not gonna beat this down with a hammer of course I'm using a grinding device the same principle to tighten it down now what you've done is you've got a good curd vise got a good granny vise here you've taken that flat plane that you originally established the largest area and now you the roll shoves that up against your square vise job the reason that works is if if if you didn't do it this way and just grabbed it without the roll it can grab the piece and twist it back and forth because it doesn't know what you're trying to do the roll takes up any unsquare Ness or unevenness unflattering to call it on this side takes out of the equation it picks up a spot and shoves your piece up against your fixed jaw take a light skim off of that okay now remember I said mark that side with an X next thing you're gonna do this is where people screw it up flip it around 180 degrees down against your bottom of your vise same deal you still got that finished side here the second side you did is on the bottom again put your roll in okay tighten it down take a skim off this side now you've got three sides skimmed in now that those three sides are skimmed in by forcing your flat side against a known square surface now we would open the vise jaw back up and of course these grinding vices with their threads take a while to open up they now you could just set the whole thing down and of course take a cut off the last side now you've got a square block of course we didn't do the ends yet and you have your choice in the mill you can run an end mill down the sides here or you can stand it back up I'll show you that in the middle then you know if you really want your sides to come out really square now that we've got four sides for every fifth and six sides left one way to do it would be to run an end mill down the sides a trick for doing that depending on a rough this is take an ml and take a pass over it take a pass over it to really get a side square like on this size material it probably taken 3/4 inch diameter and mill an ice brand-new sharp carbide end mill and scrape just a thigh or two off each side that'll give you a nice straight wall high-speed and mental or even a kind of a dull car but it'll push away a little bit it won't be perfectly swear I'm not sure how square you're trying to get it okay so that's one way to do it or of course the other way to do it would be once you got your four side square you could always stand this up in the vise indicate this up-and-down straight take a skim off of there and then you could lay this down flat and take it off the rest of the stalk off my theory has always been I square blocks first then size them okay I want I want to know they're square before I start ripping a bunch of stock off so and again this is perfectly safe what I just showed you even with it you know I would I have a three inch base bell on my machine and I would never think twice about doing what I just did a milling sheet forgetten a grinder okay so I'll show you that again so the trick is when you're holding with this roll don't be taken a quarter inch cuts here you are only squeezing it on a on a pin here just skimming it so that's what we're gonna do is wearing up the block now of course I'm gonna get myself in front of a surface grinder pretty soon but this all goes out the window of course if you have a surface grinder the first thing you would do is if you wanted to you would just lay this on the grinder on the magnet grind that side flat grind that side flat and then to square it up I would put it my vise and then I would simply close right up I don't need the roll now because I have two sides parallel okay so it's gonna grab it right and then what are you doing a grinding operation or just give me a little heads-up for the future here you would grind this side and then just turn your vise 90 degrees you grind that side but you can't do that on a mill okay so Bob I hope this helps you the trick is don't over tighten your vise when you're just squaring it up and you snug it up obviously we don't go and throw parts out of your vice but the trick is square it first then take the material the rest of the material off and you'll have a lot better luck so I'm Phil Colonel and a guy with a Sunday night video on scoring up blocks this is basic apprentice 101 the first thing apprentice I could tell if I had an apprentice that was going to be any good as if he understood squareness and you've seen my videos on checking squareness dis remembers square is excited not four sides all six sides should be square with each other okay so we will see you on the next video [Music]

Channel: The Tool and Die Guy

Views: 6,706

Rating: 4.9571428 out of 5

Keywords: apprentice, apprenticeships, tool and die making, moldmaking, mold making, plastic injection mold, machining, tool maker, tool and die maker, tool & die maker, precision machining, inspection, calibration, edm, electrical discharge machining, milling, precision measuring, deckel cutter grinder, deckel so cutter grinder, starrett, mitutoyo, brown and sharpe, the tool and die guy, Phil Kerner, made in America, tool and die training, machinist training. machining training

Id: aU1GDgCAe7o

Length: 7min 16sec (436 seconds)

Published: Fri Apr 19 2019