| 摘要 |
A memory metal or Nitinol plug is inserted into a tube and heated to cause the plug to expand as it transforms from a martensitic state to an austenitic state. The plug is held by a tool connected to an electric conductor. The tube is then grounded and current is run through the holder, the plug, and, in turn, the tube. Electrical resistance causes the plug to heat up and revert to the austenitic state. The holder is preferably a tube with an internal collet, spring urged into a closed position adapted to grasp a post of the Nitinol plug. To separate the holder from the plug, the collet is pulled to an expanded position by pulling the holder from the tube. This allows the collet to open and separate from the plug.
|
