| 摘要 |
A mechanical tube expander having a construction which facilitates a machine setup prior to coil assembly without necessitating the machine operator to leave a control panel, this being due to all setup and locking features being accomplished from the control panel. Thus, an operator climbing on ladders to various and remote locations on the machine are not necessary. This feature is accomplished by orienting a pre-size clamp and a strip clamp on opposite sides of the stripper plate and tracking the position of the stripper plate relative to the receiver in order to enable the pre-size clamp to be correctly positioned and clamped to a piston rod driven upwardly by pressurized air. Any retraction of the piston rod will cause oil to be drawn into the upper end of the piston and cylinder assemblies so that at the bottommost stroke of the mechanical tube expander, a valve will be activated to block outflow of oil at the same time that the stripper clamp is clamped to allow bullets to be removed from the tubes in an assembly of fins, after the withdrawal of such bullets the stripper clamp is unclamped to allow the mechanical tube expander to return to a predetermined position to enable another operative sequence to take place. |
