young buck triing to figure somthing out

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i know it says experts ect ....and that i am not ...but i thought it would be a good place to ask....i am building a hydrolic press with a big bottle jack im goin to attach a really bad attempt at drawing it....everything i know ive learned myself ive never gone to any school for fabrication or welding so bare with me..and any ideas would be awesome...ill break it down for you here::::   there is 3 half inch steel platesone top one bottom and one middle.......the top and bottom plates are both attached to one another via 4 3/4 inch rods one in each corner....the middle plate has 1 hole in each corner so it can go up and down on the 4 rods.....on the bottom plate sits the bottle jack which pushes the middle plate up....the middle plate has a 6x6 square tube welded to it....and the top plate has a "plunger" welded to it so when the middle goes up the plunger squishes into it.............is this making sence?  my problem is how can i weld those 4 3/4 inch rods straight up and down so that it is all good??.....i was thinking tack welding little pieces joining them all temp...i dunno any help would be cool....any help Attached Images
Reply:don't waste your time on that design.cant put much of a load on it. get a hf 20% off coupon and buy a hf press.
Reply:Are the 3/4" rods threaded? If so, you could bolt them to top/bottom. But, is this design for something specific? I'm wondering about the middle and the cube shaped object.
Reply:2nd the harbor freight vote for youDynasty 200DXPassport plus w/ spoolmate 100victor 315c oxy/(act and prop)Miller digital elitemilwaukee power tools
Reply:My computer paint skills arnt really that good the cube is a 6x 6 beam piece 1/4 inch thickness...'it is for putting fine copper wire scrap and compressing into blocks so as to not take as much room and easy to store.... Well that's the plan.... The rods are notThreaded.... I'm just working with what I can find around and already have... Like I said the plates are 1/4 inch thick 15 by 15  rods are 3/4'inch container to hold copper is 6x 6 1/4 inch thick.... The plunger consists of 4x4'beam with. 1/2'inch thick plate welded to it that fits nicely inside the 6x6.......why is this not good!???? Help me tellMe why
Reply:get a hf 20% off coupon and buy a hf press.    What is it your talkin bout????
Reply:where are you located?Dynasty 200DXPassport plus w/ spoolmate 100victor 315c oxy/(act and prop)Miller digital elitemilwaukee power tools
Reply:your posts are inconsistent regarding the thickness of the plate.. i've read them three times and i know its 1/4" or 1/2"... the strength is limited to the rods..maybe the jack will break it... or your welds..he is suggesting you buy a press rather than build a press.. for what you are doing, crushing copper together it should work as long as you dont break it with the bottle jack...
Reply:Sounds like he is wanting to build rather than buy a "trash" (copper) compactor and would like to know how to keep the four 3/4" vertical rods square with the world.This is my interpretation of his question. To OP, I don't know your experience level with regards to welding/fabrication, but if you plan on welding this up expect some distortion/warpage on the 3/4" rods. You need to keep things square in multiple planes, tack carefully. I would look at a different design that would give some added rigidity.Look around on the web at different pictures, might give you some ideas.
Reply:that is  basicall my question dune...i just gave all the info i could because most of the time people bitch that you dont tell them enough...lol......as for inconsistancy  i had 2 sets of plates and was debating which to use considering weight...and how strong i want/need it....the whole thing is up in the air some what...........but yesterday u think i did it....i layed 2 rods flat and even on the ground and tacked a couple scrap bars across to make eventhen raised them quick level and tack one side level pushany way needs be tack otherside......then when the 4 were standing the only leveling i needed to do was joining the 2 sets......lol does this even make sence....any ways it turned out pretty dam good id say... i belive there was good penetration with the weld... we'll see....im getting pretty used to it now little puddles and stuff..i basically bought a welder because i always wanted one and just did it my self....i had no clue before i should of at least "googled" it a bit...oh and im from b.c. canadaLast edited by scytzoh; 01-18-2011 at 02:48 PM.Reason: forgot
Reply:I'm not exactly up to speed on this project but I'll throw out a few random thoughts.Even the lightest hydraulic jack will easily bend un-reinforced 1/2" plate.To keep the movable plate sliding on four pins, without binding, is going to require precision slides and a very heavy structure to keep things in alignment.Trash is fluffy, or "springy" and it takes a long stroke of compression to gain just a small amount of compaction. I don't see how a typical hydraulic jack would have the required range.Scytzoh - You may have the right stuff, but used in not the best configuration. Lay it on the line so we know what cooks and then we can try to pitch-in with some suggestions.Good Luck