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5 votes
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Why do blacksmiths use these 2 tools which seem to do the same thing

One is called a press, the other is called a hammer. At this point I am just regurgitating what I have read. You can see that the press is able to shape the metal more which is is good in that it is ...
DKNguyen's user avatar
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3 votes
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Will laser cutting render my galvanized sheet metal susceptible to corrosion?

You put it well ; " no practical difference." The zinc as a sacrificial coating protects nearby steel provided there is electric conductivity such as a film of water . Lazer cutting will ...
blacksmith37's user avatar
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3 votes
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How to form steel truck fenders

Your raw material will come in the form of a large spool of sheet metal containing a strip of steel hundreds of meters long. You will need an unspooler to feed steel off the spool and a straightener ...
niels nielsen's user avatar
2 votes
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What is the cheapest way to build a fireproof box?

If the problem were to just make a box that itself did not burn in an housefire, that seems trivial and somewhat useless - 100 cm cube of brick that holds 0 (pick your volumetric units) contents If ...
Abel's user avatar
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2 votes

What is the cheapest way to build a fireproof box?

First, you need a better specification than "fireproof." Is the objective to build a box that survives a flame for a certain time? Is it to protect the contents? Does the box need to keep ...
Tiger Guy's user avatar
  • 6,871
2 votes

How to evenly heat stainless type 304 steel bar to approximately 200F?

How do you measure the temperature? If you use an infrared thermometer, this won‘t work because of reflection. Use a thermistor based measurement device for verification.
HansPeterLoft's user avatar
2 votes

How can we tell if a press mold need more stages?

Depends on the ductility of the "sheet metal".Commonly steel or aluminum, but that is just part of the answer ; the particular alloy and condition/temper must be known . Also die life- number of parts ...
blacksmith37's user avatar
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1 vote
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Fire rated EN 13501-1 B-s1/s2, d0 sheets

In Reaction to fire tests Calcium Silicate boards or gypsum boards are often used as substrate; these boards are classified as A1 or A2 according to the european EN 13501-1 standard. These boards are ...
Geard's user avatar
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1 vote

Metal sheet forming - material properties when switching material

Springback will mostly be controlled by yield strength. And because all three materials have the same minimum yield (140 Mpa), the only option is to bend samples. You could get identical results with ...
blacksmith37's user avatar
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1 vote
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Bendable flaps on sheet metal

They will need to be sized appropriate to the load that will be applied, which means that they are not “standard”. You need to make sure the part that bends is sufficiently strong and will have ...
Solar Mike's user avatar
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1 vote

Will laser cutting render my galvanized sheet metal susceptible to corrosion?

Zinc protects by sealing the steel, but also protects it by acting as a sacrificial anode if that seal is breached. So yes, exposed edges does make the steel more susceptible to corrosion, but not ...
DKNguyen's user avatar
  • 5,606
1 vote
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Bending a concave sheet metal lip in AutoDesk Inventor

I've had a quick go - it's hard to be more precise without measurements, and it should be stressed that the actual bent shape of the metal is very weird, and difficult to model. Hopefully this will ...
Jonathan R Swift's user avatar
1 vote

Understanding metalwork manufacture -- How are Purchase Quotations prepared?

As Mahendra Gunawardena said, there's not one universally used method of pricing manufacturing projects, but there are some pretty common facts that result from the economics of the situation. ...
Ethan48's user avatar
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1 vote

Coating gold on to sunglasses lenses?

You will have to use vapor deposition under high vacuum. This requires a piston vacuum pump to get a rough vacuum, then a turbomolecular or diffusion pump to get to high vacuum. Then heat gold in this ...
ericnutsch's user avatar
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1 vote

How do I size metal plates to get the correct dimensions after folding?

Yes use Aluminum 5052 H32 for sheet metal parts with bends. r =or> T. I do it like this, get the lengths of the straight lines and set aside. The t/T is a little more than .50, say .53 until you get ...
John Conway's user avatar

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