Purchased a "cold welder"

GunsOfNavarone

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I have been watching the cold welders on youtube for a while. I never jumped on the band wagon as they pretty much required buying from China and had to deal with the shipping crap shoot. As of late, they have become available, shipped from the states, so I jumped on board. I have a TIG and a MIG so this was going to be very ancillary for me. I started with razor blades, getting those setting downs. I can do this with my TIG, but there is heat input and you have to be very careful as to not distort. The cold welder is capacitor type welding. It's a quick snap, the puddle and surround metal is very bright/shiny with some occasional color, but mostly like polished silver. The razor blades were completely cool after stitching them together. I can see a use for this on very thin sheet metal.
You can use it as a cold spot welder or a cold pulse spot welder. The unit does normal DC welding and DC pulse, but I already have a machine that does this well, I am only interested in the "cold" aspect.
The brand I went with was Andeli (box shows from Thailand) They have many models....with MIG, Plasma, Weld cleaner, mine model is 250-MPL.
Dissimilar metals, I cold welded a sheet of copper to a steel ball. Obviously I was starting to really screw around, but I was having a blast. I by no means am saying this thing is a top notch welder. I'm not a fan of the 9 or 17 torches it came with (actually it's the hose, as I an used to CK's sure flexible hose) but they work. Changing them would take modification as it's not a dinse connector with a quick connect argon line, it's a screw on connector that the gas runs through the center of it. I'll do some picture soon when I switch to my phone for. I ended up purchasing my own 366cf bottle for my TIG so I could get another gas regulator as this uses a barb connector to supply argon.
I ended up paying about $400 for it with the amazon cash back I had saved up. I think it was easily worth that. It will be some time of playing around to find it's place in my setups, but I think a viable tool in the end. Anyone have one or experience with a cold welder?
 
We use similar equipment for micro welds on electronic components. Some what flexible heat and duration settings.
Pierre
 
You have very good control of penetration depth…this is one of the test blade I did. Couple screw ups where my torch height was a bit too high. If you watch videos on these machines, you see by all the tungsten sticks, you really keep it tight. (I don’t like to do that) these are some of the oddities I need to adapt to.6EE6C47F-160C-4BD7-A42B-34566AD96921.jpeg
 
I have seen these in action and never knew what they were.
Cold welders.
Can you send a link to the one you purchased?
 
Are these similar in principle to resistance soldering but with more power?
 
This is similar to what we use. Can get them on the used market.

Hughes HRW 50B there are different power units​

The 50 stands for 50 watt seconds, seen rated all the way to 750 watt seconds.
Pierre
 

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Are these similar in principle to resistance soldering but with more power?
I can’t say, but it’s considered (and also called) capacitor welding. Depending your settings, it’s almost like walking on carpeted floors wearing socks, sticking your finger out and zapping your wife’s backside.
:laughing:
 
Are these similar in principle to resistance soldering but with more power?
No, these are not spot/resistance welders.

Looks like some sort of a repetition single manual pulse TIG welding with Argon gas. See video.

Will be interesting to know how thick of a material can be welded like this and how strong is the weld.

Ariel
 
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