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Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Ontario GTA West area meetup is planned for Saturday April 26th at Greasemonkeys shop in Aylmer Ontario. If you are interested and haven’t signed up yet, click here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!
Need a tool and die maker
- Thread starter Robzee
- Start date
Robzee
Member
Thank you for that. Noted! Hundreds to low thousands here, millions, now that's a lofty goal but one day
Robzee
Member
Could you, or anyone else, advise me on what press and pressure would be needed to press say a 10 oz silver bar? I'd pour a 10oz bar like the bottom left in the attached image here, and press the design into it with a set of made dies, that ill need made if anyone knows anyone.
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My experience with silver sheet is that you want to get the lowest nickle content possible. The silver I used to use had high enough nickle to cause it to be very hard - the cutting with a jewelers' saw was very slow going.
Even pure silver requires pretty high pressures to be ductile. For any diameter of coin, the press requirement goes up with the square, naturally, but for hardness of material the press requirement goes up exponentially as well.
Now to answer your question. If you are just stamping the letters, then the pressure required is the Volume of the indent, with a factor for the square area of that image, times a constant. So if you have a logo like the one pictured, then it gets very high quickly.
Have you considered a striking die to be used just after is sets up, say at 800 F? This does not require a press or even a fancy alloy, even cold rolled will do...
Even pure silver requires pretty high pressures to be ductile. For any diameter of coin, the press requirement goes up with the square, naturally, but for hardness of material the press requirement goes up exponentially as well.
Now to answer your question. If you are just stamping the letters, then the pressure required is the Volume of the indent, with a factor for the square area of that image, times a constant. So if you have a logo like the one pictured, then it gets very high quickly.
Have you considered a striking die to be used just after is sets up, say at 800 F? This does not require a press or even a fancy alloy, even cold rolled will do...
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Cool items! You asked about steels - Dabbler knows more. Rio grande online is where my spouse gets her silver sheet. Good prices and pristine sheet. They also have Pepe tools rolling mills if you know them. They are nice but not hydraulic.
Look for a book in homemade jewellery press 20 ton. I can’t remember the title but it’s a good project and is a useful tool might be good for you.