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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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#1
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Going Round and Round
Here, I guess is a newbie question, because I don't remember that part of machine
shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron |
#2
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Although not punching as you requested you could consider a circle
shear. These are used for cutting circles from square blanks for say metal spinning were you don't usually want a hole in the centre. Ron Hubbard wrote: Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron |
#3
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"Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" |
#4
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"David Billington" wrote in message .. . Although not punching as you requested you could consider a circle shear. These are used for cutting circles from square blanks for say metal spinning were you don't usually want a hole in the centre. Would that work for small diameter circles, say, 1/2" to 3/4" diameter circles? Ron |
#5
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"Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" Is a punch press an expensive item to purchase? Ron |
#6
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"Ron Hubbard" wrote in message
... "Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" Is a punch press an expensive item to purchase? If all you want to do is punch some rounds ("one-off" quantities), you might get by with an arbor press, in which case the die set would likely be the most expensive tool. If you want a "production-type" punch press, well, depending on the size, you might have to build some place to house it. :-) -jc- |
#7
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"John Chase" wrote in message m... "Ron Hubbard" wrote in message ... "Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" Is a punch press an expensive item to purchase? If all you want to do is punch some rounds ("one-off" quantities), you might get by with an arbor press, in which case the die set would likely be the most expensive tool. If you want a "production-type" punch press, well, depending on the size, you might have to build some place to house it. :-) I just need to make a few thin aluminum or brass circles to make custom piezo-buzzers like the kind used in alarm clocks, smoke alarms, etc. Ron |
#8
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Is a punch press an expensive item to purchase?
I just need to make a few thin aluminum or brass circles to make custom piezo-buzzers like the kind used in alarm clocks, smoke alarms I bought a 4 ton roper whitney hand operated bench punch for a 200. Fit the right punch and die and it will punch out circles. |
#9
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For a few prototypes you might try a hole saw in a drill press. If you
just have a hand drill, maybe clamping the metal between a couple of sheets of fairly thick plywood would keep the hole saw from wandering. ( You would have to drill thru one piece of plywood first, but you could use a drill in the center of the hole saw when you do that. ) After you are sure of what you want, you might be able to make a die set using a drill bushing for half of the set. You could probably use a vise to apply the pressure to cut out disks out of thin material. Dan |
#10
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What it sounds like you need is a shim punch, such as that shown
http://www.harborfreight.com/cpi/cta...emnumber=47734 or http://cgi.ebay.com/ws/eBayISAPI.dll... 861&tc=photo Which can be driven with a hammer or a press "Ron Hubbard" wrote: "John Chase" wrote in message om... "Ron Hubbard" wrote in message ... "Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" Is a punch press an expensive item to purchase? If all you want to do is punch some rounds ("one-off" quantities), you might get by with an arbor press, in which case the die set would likely be the most expensive tool. If you want a "production-type" punch press, well, depending on the size, you might have to build some place to house it. :-) I just need to make a few thin aluminum or brass circles to make custom piezo-buzzers like the kind used in alarm clocks, smoke alarms, etc. Ron jk |
#11
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"Ron Hubbard" wrote in message ... "Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" Is a punch press an expensive item to purchase? Ron From the rest of what I read about your job, a small arbor press will be fine. |
#12
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"Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... "Tom Gardner" wrote in message m... "Ron Hubbard" wrote in message ... Here, I guess is a newbie question, because I don't remember that part of machine shop. Does anyone know of a way to punch out nice round circles of aluminum or brass out of sheet metal in such a way that there are no holes in the circles? Ron How big? How thick? How many? The obvious answer is a die set on a punch press. I punch millions of rounds from 0.1875" x 6" Is a punch press an expensive item to purchase? Ron From the rest of what I read about your job, a small arbor press will be fine. Hmm, Amazon.com has a half-ton arbor press for $27.00 without shipping & handling. But they don't sell dies; would you happen to know of a source for compatible dies? Ron |
#13
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From the rest of what I read about your job, a small arbor press will be
fine. Hmm, Amazon.com has a half-ton arbor press for $27.00 without shipping & handling. In order to use an arbor press, you need to fabricate a way to hold the punch to the ram and the die to base so that they line up. Not too hard for someone equiped with some metalworking tools, but I don't think the original poster has much metal working equipment (if any). A 1/2 ton is not very much push when it comes to punching. According to roperwhitney.com, http://roperwhitney.com/tech/chart1.cfm A 1/2 ton will punch a 1/8 inch hole in 18 gage steel. I doubt that is large enough to do what the original poster wants. |
#14
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"Chuck Sherwood" wrote in message ... From the rest of what I read about your job, a small arbor press will be fine. Hmm, Amazon.com has a half-ton arbor press for $27.00 without shipping & handling. In order to use an arbor press, you need to fabricate a way to hold the punch to the ram and the die to base so that they line up. Not too hard for someone equiped with some metalworking tools, but I don't think the original poster has much metal working equipment (if any). A 1/2 ton is not very much push when it comes to punching. According to roperwhitney.com, http://roperwhitney.com/tech/chart1.cfm A 1/2 ton will punch a 1/8 inch hole in 18 gage steel. I doubt that is large enough to do what the original poster wants. Just need a few circles made out of thin metal-- 0.001 to 0.005" thick (or thin one could say). But sounds like I might have an easier time going to a metal shop and have them punch out a couple of circles. Ron |
#15
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For relatiivly few pieces in such thin stock, I would use a felt tip
marker to color the material , scribe the circle with a compass, and cut out with some aircraft type tin snips. You might have to cut a few thousands big and get rid of any burrs with sandpaper. Dan |
#16
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Just need a few circles made out of thin metal-- 0.001 to 0.005" thick Thats almost like punching paper! You could buy some circle punchs intended for gaskets. Place the "foil" on top of a pad of paper and strike the cirle punch with a hammer. Should would fine. chuck |
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