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- Hello Mr Mohsen Ajalloueian;
I have contacted a magnet wire specialist for you and hopefully, he will post an up to date answer for you. In the meantime, here are two threads and one paper to read:
- Hello Mr ikiz
When we were re-drawing electro-tinned copper wire, we were using a Syncro C-13 drawing machine with ceramic rings and a Syncro C-3 electric AC annealer. As I recall, the last three dies were new natural diamond and the balance of the dies were high new polish carbide. All dies had the standard angles for copper wire. The drawing lubricant was Lusol WD-1 synthetic and had a slightly higher than normal concentration as that recommended forthe intermediate drawing of copper wire.
That was long ago, before nano diamond dies and polycrystalline diamond dies (Which of course would have been a disaster.) If you have some other experience with re-drawing tinned copper wire, I am sure that we would all be appreciate of your understanding , of dies and experience..
Please provide us with your complete information.
- Hello Mr. Do Van Bac,
As you are already aware, the hot dip tinning of drawn-to-size annealed copper wire, results in a surface of the tin that is rough even though the wire passed through a wiping die.
On the other hand when electroplating with tin on any copper wire, the tin surface is very smooth and of constant thickness as long as the wire was properly cleaned beforehand .and that the electroplating settings remained constant
One of the major problems with electroplating however is strict environmental control so that no contaminants get into your sewer system. Closed cascading forward rinsing systems are therefore typically used.
One problem with the drawing of tinned copper wire is the contamination drawing lubricant and annealing cooling water so that the drawing machine in question is not on some large drawing lubricant system and annealer cooling reservoir system.
1. "After tin-plating via electroplating, does the tinned copper wire need any processes for its surface?" No as long as you have not damaged the surface in the annealer.
2. "In the next drawing process, what will we have to pay attention to make sure the tin layer is guaranteed after drawing?" You have to inspect the final tin thickness on a statistical basis to ensure the proper thickness of tin is there. This is generally done with a good measuring microscope.
- Hello everybody,
My company is using hot dip coating technology for copper wire. Copper wire will be drawn until reaching the diametter that we want, after that it will be tinned.
Now, I am reseaching on tin-plating copper wire via electroplating and the the tinned copper wire will be drawn to a smaller diametter.
I have some queries:
1. After tin-plating via electroplating, does the tinned copper wire need any processes for its surface?
2. In the next drawing process, what will we have to pay attention to make sure the tin layer is guaranteed after drawing?
Please give me some advices.
Thank you very much.
Do Van Bac
I have read the Drawing die chapter 14 from `Ferrous Wire Handbook´, and found out that it is recommended to use wider angle die ,around 18 degree approach angle for stainless steel.
It is not elaborated in good detail in the text book and I am confused for whether to use this 18 deg angle for the entire die pass schedule( decreasing reduction sequence) or mix the die angles( 18 deg for 1st red and 12 deg for later small reductions).