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| How do I make a tool for swaging copper plate ? |
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| picclock:
Hi everybody - hope you had a good xmas !! I want to swage a 10mm hole in a piece of copper plate to get good thermal conductivity. Copper plate 0.7mm (may up to 0.9). 10mm copper tube onto which it fits. The copper plate is part of a heat exchanger. I have a heat exchanger done in this way from a phillips ice making machine and it looks like a really good job with about 4mm of swaged Aluminium gripping the copper pipe. So I'm guessing I just need to turn up the correct size tooling in steel and then use a press to achieve this. But basically I haven't got a clue where to start. Any weblinks or reference book pointers on how this stuff works and how the tooling works to pierce and stretch a piece of flat metal to this shape much appreciated. Best Regards picclock |
| awemawson:
Perhaps a picture of what you are trying to emulate would whet our imaginations? |
| picclock:
A picture of the philips will be on its way when I get to my workshop tomorrow. To clarify, a 10mm necked hole is made in the copper plate through which a copper pipe is fitted. The neck of the hole on the philips example is about 4mm above the plate surface, giving a large contact are and low thermal resistance. The pipe is an interference fit. I wish to make some tooling to emulate this. Have found a picture of a larger one although the swaged neck is not clearly shown, however its the same type of construct. Hope this helps Best Regards Picclock |
| vtsteam:
Seems like just a short tapered press punch and a longer die with a hole through both to accept the tube, and the punch and die shaped to produce the swage you want. Hole in sheet is a tight sliding fit on the tube. Slide it all together and press. Crude short swage version would be to just push tube through a too small hole backed by a shaping die as above -- if the tube can stand the compression without buckling. |
| picclock:
Hi Pictures as promised. I'm thinking a 3mm hole in the sheet metal. The tooling (forming tool)with a 3mm slightly tapered end then a 30 degree taper to the final size (9.7mm). Not sure what to use as a outside support. sort of guess 11mm hole with 1mm radius edge (sheet 1mm thick). See Drawing. figure I could use silver steel and harden it for the forming part, and just mild steel for the female part. All new to me so any advice welcome Best Regards picclock |
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