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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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online machining tutorial?
"Alex" wrote in message m... Is there any online machining tutorial? Books are rather expensive. Thanks Which aspect? What is your experience-where do you want to start? The best place to start is dirty hands,get a file or ten and a chunk of metal and make something.Or copy something.After a month of that you will figure out ways to use power tools and then toolroom machines to save time and work.And calloses(sp?.) wws |
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online machining tutorial?
wws wrote:
"Alex" wrote in message m... Is there any online machining tutorial? Books are rather expensive. Thanks Which aspect? What is your experience-where do you want to start? The best place to start is dirty hands,get a file or ten and a chunk of metal and make something.Or copy something.After a month of that you will figure out ways to use power tools and then toolroom machines to save time and work.And calloses(sp?.) Here's what my first project was: 1) Obtain the following items: - Scriber (or a sharp pencil) - Steel rule - Hacksaw - Power drill with 10mm or more HSS drillbit; ideally a nice column drill - About 100mm of mild steel, perhaps 25mm wide by 3mm deep - A g-clamp or two - A flat file - A round file 2) Now use the scriber and the steel rule to mark out the end of the steel bar like so: ----------------------------------------------- |\ | \ A | \-------------------- B | | + | \ | C \ | \ ----------------------------------------------- Ok, that + sign is where you're going to drill the 10mm or so hole; it should be placed so that the top edge of the circle cut just meets the top line, but it meets the slanting line underneath such that it makes a hooked thingy (plan this out by holding the round end of the drill over the + to gauge the approximate extents of the hole). I can't remember the exact dimensions, but if I give you a hint and say that it's going to be a bottle opener, you can measure a bottle and work out dimensions that will allow the hook part to get under the edge of a bottle cap while the long bar at the top sits roughly in the middle of the cap. 3) G-clamp the bar to a stout bench, with the place where the hole will be either over empty space or (ideally) over a bit of scrap wood. Drill the hole. You will probably find that it overlaps or underlaps your lines. Adjust the lines to suit the hole - the need to meet it on tangents to the circle. The intial lines were just guides to let you get the proportions right to place the hole. 4) G-clamp the bar to a stout bench, but so that the long line marked B above is protruding in a way that you'll find easy to hacksaw. Hold the saw at a comfortable angle, but close to the plane of the metal bar rather than close to being 'across' the metal, since hacksaws work better with more teeth in contact. Keeping carefully to the line and holding the hacksaw from both ends, saw down to where it meets the circle. Slow down as you get close to the point of contact, and don't overshoot or you'll cut into the far side of the circle and produce a blemish. 5) Re-clamp the bar so you can cut along C, and repeat the above procedure. A chunk of scrap metal will now fall off, which you will keep, because it will come in useful as soon as you throw it away. 6) Re-clamp and cut A. 7) Now, you'll have a workable bottle opener, but it'll have nasty rough edges. So get your file and start by smoothing over the edges you've cut (with the flat file), paying particular attention to getting a smooth interface with the circular hole, since that looks real neat; use the round file for the interface since it fits the shape of the hole better. Then go round the thing just gently chamfering or rounding the edges (apart from the point where line C meets the circle! Keep a sharp point there!) in order to make it comfortable and unlikely to cut anybody by accident. 8) For bonus points, put it in your barbeque at top whack until it glows at least orange hot, then (using tongs) fling it straight into cold water with as much salt as will dissolve in, which might make it harder (so it won't bend as fast). However it will now be more fragile - throwing it at concrete might shatter it instead of just denting one end. Tada! THEN make another one. This time, use a CNC milling machine to cut the bits out. It's easier, but you get a pile of swarf instead of a nice chunk of metal that will prove useful the minute it's thrown away. THEN make another one, but this time make it with a shorter handle, and use a lathe to turn a nice shaped cylindrical handle. Mill a slot in the end to receive the 'handle' of the shorter opener, of precisely the width of the steel, so it slides in with some effort. Clamp it into the slot and use the column drill to drill a hole through both of them, along an axis perpendicular to the bottle opener. Put a steel rod through that fits easily, but without a visible gap (hahah! Already drilled the hole before reading about the rod that just fits the hole? Learning experience!). Get some silver solder and flux. Liberally coat the steel rod in flux and push it in. Zap the thing with a blowtorch *from the other side* until it's just starting to glow then poke silver solder wire at the tiny gap between steel rod and handle; it should melt and disappear inside. Continue until it appears at the far side, where the blowtorch is applied. Remove heat and allow to cool. Don't get the actual bottle opener head any hotter than cannot be avoided - it'll ruin the hardening. File the protruding ends of steel rod down until it is jus nearly flush with the handle, then pop it back in the lathe and finish the surface off. Then start giving bottle openers to your friends as you try to figure out ways to use more and more tools in making them ;-) wws ABS |
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online machining tutorial?
Try http://www.metalwebnews.com/ and lots of links from it. I remeber a web site from a voteck college that was the machining 101 course online. But, I lost the web address. Karl On Wed, 27 Aug 2003 05:42:29 GMT, "Alex" wrote: Is there any online machining tutorial? Books are rather expensive. Thanks |
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online machining tutorial?
Alex" wrote in message
m... Is there any online machining tutorial? Books are rather expensive. Thanks Alex, Lindsay Publications does reprints of old machining books and manuals. They have reprint paperback books on lathe operation and mill operation for very reasonable prices. As I said they are OLD but the basic principles are exactly the same as today. they also have books on lots of other processes too. Electroplating, sand casting, investment casting, blacksmithing and forging etc. Gary H. Lucas |
#5
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online machining tutorial?
Alex scribed in
: Is there any online machining tutorial? Books are rather expensive. books are the cheapest education you'll ever buy there is no substitute swarf, steam and wind -- David Forsyth -:- the email address is real /"\ http://terrapin.ru.ac.za/~iwdf/welcome.html \ / ASCII Ribbon campaign against HTML E-Mail - - - - - - - X If you receive email saying "Send this to everyone you know," / \ PLEASE pretend you don't know me. |
#6
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online machining tutorial?
On Wed, 27 Aug 2003 05:42:29 GMT, "Alex" wrote:
Is there any online machining tutorial? Books are rather expensive. Doing machine work while watching a computer monitor or reading from a printout are not my idea of a good way to learn. If you are pretty much a newbie to all of it, buy something like Mohltrecht's "Machine Shop Practice" (two volumes) and learn and have something that will still tell you what you need to know as your learning curve advances or as you try something new. "Machine Shop Practice" is available from MSC, Enco, and a number of other places and you can get it for $16 to $20 per volume depending on whether or not it is on sale. Just getting Volume I will probably satisfy all your needs for the first year or two. Later you may want to add Machinery's Handbook for reference but the Mohltrecht books have nearly all the reference tables you'll want. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#7
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online machining tutorial?
"Alaric B Snell" wrote in message ... wws wrote: "Alex" wrote in message m... Is there any online machining tutorial? Books are rather expensive. Thanks Which aspect? What is your experience-where do you want to start? The best place to start is dirty hands,get a file or ten and a chunk of metal and make something.Or copy something.After a month of that you will figure out ways to use power tools and then toolroom machines to save time and work.And calloses(sp?.) Here's what my first project was: 1) Obtain the following items: - Scriber (or a sharp pencil) - Steel rule - Hacksaw - Power drill with 10mm or more HSS drillbit; ideally a nice column drill - About 100mm of mild steel, perhaps 25mm wide by 3mm deep - A g-clamp or two - A flat file - A round file 2) Now use the scriber and the steel rule to mark out the end of the steel bar like so: ----------------------------------------------- |\ | \ A | \-------------------- B | | + | \ | C \ | \ ----------------------------------------------- Ok, that + sign is where you're going to drill the 10mm or so hole; it should be placed so that the top edge of the circle cut just meets the top line, but it meets the slanting line underneath such that it makes a hooked thingy (plan this out by holding the round end of the drill over the + to gauge the approximate extents of the hole). I can't remember the exact dimensions, but if I give you a hint and say that it's going to be a bottle opener, you can measure a bottle and work out dimensions that will allow the hook part to get under the edge of a bottle cap while the long bar at the top sits roughly in the middle of the cap. 3) G-clamp the bar to a stout bench, with the place where the hole will be either over empty space or (ideally) over a bit of scrap wood. Drill the hole. You will probably find that it overlaps or underlaps your lines. Adjust the lines to suit the hole - the need to meet it on tangents to the circle. The intial lines were just guides to let you get the proportions right to place the hole. 4) G-clamp the bar to a stout bench, but so that the long line marked B above is protruding in a way that you'll find easy to hacksaw. Hold the saw at a comfortable angle, but close to the plane of the metal bar rather than close to being 'across' the metal, since hacksaws work better with more teeth in contact. Keeping carefully to the line and holding the hacksaw from both ends, saw down to where it meets the circle. Slow down as you get close to the point of contact, and don't overshoot or you'll cut into the far side of the circle and produce a blemish. 5) Re-clamp the bar so you can cut along C, and repeat the above procedure. A chunk of scrap metal will now fall off, which you will keep, because it will come in useful as soon as you throw it away. 6) Re-clamp and cut A. 7) Now, you'll have a workable bottle opener, but it'll have nasty rough edges. So get your file and start by smoothing over the edges you've cut (with the flat file), paying particular attention to getting a smooth interface with the circular hole, since that looks real neat; use the round file for the interface since it fits the shape of the hole better. Then go round the thing just gently chamfering or rounding the edges (apart from the point where line C meets the circle! Keep a sharp point there!) in order to make it comfortable and unlikely to cut anybody by accident. 8) For bonus points, put it in your barbeque at top whack until it glows at least orange hot, then (using tongs) fling it straight into cold water with as much salt as will dissolve in, which might make it harder (so it won't bend as fast). However it will now be more fragile - throwing it at concrete might shatter it instead of just denting one end. Tada! THEN make another one. This time, use a CNC milling machine to cut the bits out. It's easier, but you get a pile of swarf instead of a nice chunk of metal that will prove useful the minute it's thrown away. THEN make another one, but this time make it with a shorter handle, and use a lathe to turn a nice shaped cylindrical handle. Mill a slot in the end to receive the 'handle' of the shorter opener, of precisely the width of the steel, so it slides in with some effort. Clamp it into the slot and use the column drill to drill a hole through both of them, along an axis perpendicular to the bottle opener. Put a steel rod through that fits easily, but without a visible gap (hahah! Already drilled the hole before reading about the rod that just fits the hole? Learning experience!). Get some silver solder and flux. Liberally coat the steel rod in flux and push it in. Zap the thing with a blowtorch *from the other side* until it's just starting to glow then poke silver solder wire at the tiny gap between steel rod and handle; it should melt and disappear inside. Continue until it appears at the far side, where the blowtorch is applied. Remove heat and allow to cool. Don't get the actual bottle opener head any hotter than cannot be avoided - it'll ruin the hardening. File the protruding ends of steel rod down until it is jus nearly flush with the handle, then pop it back in the lathe and finish the surface off. Then start giving bottle openers to your friends as you try to figure out ways to use more and more tools in making them ;-) wws ABS Solder is not "metalworking." Use a peening hammer to "grow" the rod in the hole and leave a nice button on top and bottom.That way if it falls in the bbq pit it won't come undone. wws |
#8
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online machining tutorial?
In article ,
Alaric B Snell wrote: wws wrote: "Alex" wrote in message m... Is there any online machining tutorial? Books are rather expensive. I'll snip most of this, just adding some translations where they might be useful (English to American. :-) Here's what my first project was: 1) Obtain the following items: [ ... ] - Power drill with 10mm or more HSS drillbit; ideally a nice column drill "Column drill" = "Drill Press" - About 100mm of mild steel, perhaps 25mm wide by 3mm deep Convert metric units to inches by dividing by 25.4 (mm/inch) - A g-clamp or two "g-clamp" - "c-clamp" [ ... ] 8) For bonus points, put it in your barbeque at top whack until it glows "Top whack" == "full heat" (I think) [ ... ] Then start giving bottle openers to your friends as you try to figure out ways to use more and more tools in making them ;-) An interesting approach. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#9
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online machining tutorial?
wws wrote:
Solder is not "metalworking." Well, what is it then? :-) Use a peening hammer to "grow" the rod in the hole and leave a nice button on top and bottom.That way if it falls in the bbq pit it won't come undone. This, however, I agree with! wws ABS |
#10
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online machining tutorial?
"Alaric B Snell" wrote in message
... wws wrote: Solder is not "metalworking." Well, what is it then? :-) Use a peening hammer to "grow" the rod in the hole and leave a nice button on top and bottom.That way if it falls in the bbq pit it won't come undone. This, however, I agree with! wws ABS I know soldering when I see it. And lots of what I see definitely ain't metal working! Gary H. Lucas |
#11
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online machining tutorial?
One learns by doing. Simple as that.
Start simple. Make simple a little different. Make complex... Start making simple tools. You always need something for the lathe or mill - custom clamps or turning a hand punch. Martin -- Martin Eastburn, Barbara Eastburn @ home at Lion's Lair with our computer NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder |
#12
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online machining tutorial?
At 3.1 MB, this might interest:
http://web.onetel.net.uk/~jordan88/E...actice1942.zip Concise, good quality info for beginners. Jordan Alex wrote: Is there any online machining tutorial? Books are rather expensive. Thanks |
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