Icarleug
20-01-2014, 02:19 PM
I tried to find some information about how to pull wire through a drawplate to form non-round wire, but could not find any conclusive information to about how to do it (well, other then to obviously pull it through the plate).
This is mainly to make oval wire for rings in the case I cannot get it in the size I want, preferably from round stock since I don't own a rolling mill.
I assume the process of drawing it is like drawing round wire: find out what size hole the stock will go through, taper it and pull it through the next smaller one in succession until you get the size you want (with a drawbench if necessary), annealing occasionally.
It is mostly the plasticity and (de)forming of the wire that concerns me.
If we take an oval as an example, in case I wanted a 4x2 mm oval, which stock would I begin with?
Assuming a 100% stretch in the length of the wire I would need a stock wire of 4x4 mm.
If however it all stretches to the sides I would just need a 3x3 mm wire (well, actually a little bit smaller, but close enough).
I suspect it is somewhere in between, that is that the stretching is quite uniform until it has filled the oval, then it will just reduce in size.
Also I wouldn't want to force the wire into a shape that would compromise its integrity, such as making it crack when soldered or cold-worked later on.
Do anyone have any experience with drawing oddly shaped wires, and if there is any difference between silver and the different carats of gold?
/Andreas
This is mainly to make oval wire for rings in the case I cannot get it in the size I want, preferably from round stock since I don't own a rolling mill.
I assume the process of drawing it is like drawing round wire: find out what size hole the stock will go through, taper it and pull it through the next smaller one in succession until you get the size you want (with a drawbench if necessary), annealing occasionally.
It is mostly the plasticity and (de)forming of the wire that concerns me.
If we take an oval as an example, in case I wanted a 4x2 mm oval, which stock would I begin with?
Assuming a 100% stretch in the length of the wire I would need a stock wire of 4x4 mm.
If however it all stretches to the sides I would just need a 3x3 mm wire (well, actually a little bit smaller, but close enough).
I suspect it is somewhere in between, that is that the stretching is quite uniform until it has filled the oval, then it will just reduce in size.
Also I wouldn't want to force the wire into a shape that would compromise its integrity, such as making it crack when soldered or cold-worked later on.
Do anyone have any experience with drawing oddly shaped wires, and if there is any difference between silver and the different carats of gold?
/Andreas