From: muratlanne@gmail.com   
      
   BP wrote in message news:10hk2of$6453$1@dont-email.me...   
      
   Leon Fisk  wrote:   
   > On Thu, 11 Dec 2025 12:44:48 -0700   
   > Bob La Londe  wrote:   
   >   
   >>but I'd like to be able to weld the links.  I've seen a process (don't   
   >>recall where) that looks like they get the ends hot and stick them   
   >>together, but the logistics don't make sense to me.  Electricity don't   
   >>flow the right way for that to happen in my mind.   
   >   
   > Commercial chain making uses kick-butt resistance welders (like spot   
   > welders).   
   >   
   > Each side of the open link gets clamped down and then oodles of current   
   > are applied at low voltage. The ends glow red and when they melt the   
   > clamped ends slightly nudge together. Current is shut off and they're   
   > left to cool. The bulge or collar formed is knocked or ground off.   
   > Lots of youtube vids show the process:   
   >   
   > https://www.youtube.com/watch?v=vZ-iD7NVaIQ   
   >   
   > https://www.youtube.com/watch?v=Ma9XnaK7NEQ   
   >   
   > https://www.youtube.com/watch?v=0j21LBq3OVs   
      
   Does anybody know if the welding is done with AC or DC?   
   I'd think AC, since the loop side of the link presents   
   a reactance that could be tuned to favor sending more   
   current through the joint. But, it isn't obvious the   
   effect is big enough to be useful at frequenccies   
   consistent with delivering enough power.   
      
   Thanks for posting,   
      
   bob prohaska   
   ------------------------------   
   If the current passes through both ends crosswise in parallel to heat both   
   independently there would be little current around the loop.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)