| 摘要 |
<p>Riveting apparatus (20) wherein a planetary roller screw (22) delivers the high forces required for actuating the fastener upset tooling (50). In order that precise control of the entire upset operation may be obtained, a servo-controlled electric motor (32) operates the actuator (24). In order that different machining operations may be performed on a workpiece without having to provide an actuator for each tool, the tools are engaged in turn by the actuator for performing riveting and other machining in succession.</p> |
