COPPER TUBES MADE BY DIE AND PUNCH
Page 34
If you've noticed an error in this article please click here to report it so we can fix it.
AN unusual example of the extraordinary ductility of copper was cited by Mr. B. H. Thorp, M.Sc.. A.M.I.Mech.E., mechanical engineer to
the Copper Development Association, in a lecture to members of the Engineering Society, at Leeds University, on January 30.
Describing a process used during the war to produce honeycomb radiator and oil cooler tubes by the million, he said: "A piece of copper rod about 0.4 in. in diameter and about in. long is placed in a die and a punch is driven into it, forcing the copper out through the die in the form of a tube about 3/16 in. in diameter and up to 14 ins. long, and with a wall about 6/1000 in. thick.
"The. whole operation takes rather less than one second to complete and is carried out with the copper at room temperature and without any preheating."