| 摘要 |
A copper pipe expander is provided to enhance cooling efficiency and reduce the number of working time for welding due to blocking of a pipe expender rod with a contact sensor. A copper pipe expander comprises a tool table(11) which is formed in order to rotate while expending a pipe; a transport unit(10) including a guide rail; contact rods(14,15) adjusting operation interval of transport unit forward and rearward; a fixing unit(30) consisting of 1 fixing unit and 2 fixing unit; and a base(40) in which contact sensors(42,43) controlling the operation interval of the transport unit.
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