| 摘要 |
<p>A method of, and a draw bench for, cold drawing seamless metal tubes each having an upset portion on both ends, which comprises a die control device (20), a plug control device (60) including a plut (100) having large and small diameter bearing portions, and a draw unit (110). The die control device and the plug control device are movable with each other for changing the cross-sectional reducing area between the reducing die and the plug. </p> |
