초록 ▼

Riveting apparatus wherein a planetary roller screw delivers the high forces required for actuating the fastener upset tooling. In order that precise control of the entire upset operation may be obtained, a servo-controlled electric motor operates the actuator. In order that different machining oper

Riveting apparatus wherein a planetary roller screw delivers the high forces required for actuating the fastener upset tooling. In order that precise control of the entire upset operation may be obtained, a servo-controlled electric motor operates the actuator. 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.

대표청구항 ▼

[ What is claimed is:] [1.] A method of riveting comprising inserting a fastener in position for riveting, positioning tooling for upsetting the fastener, providing a planetary arrangement of rollers around a shaft and engaged between a nut and the shaft for converting rotary motion of one of the nu

[ What is claimed is:] [1.] A method of riveting comprising inserting a fastener in position for riveting, positioning tooling for upsetting the fastener, providing a planetary arrangement of rollers around a shaft and engaged between a nut and the shaft for converting rotary motion of one of the nut and shaft to linear motion of the other of the nut and shaft, operatively coupling said one of the shaft and the nut directly to said tooling. and rotating said one of the nut and shaft to thereby effect linear movement of the other of said nut and shaft to thereby actuate said tooling to upset the fastener, so that said linear movement of the other of said nut and shaft causes movement of said tooling in contact with the fastener and application of force to upset the fastener.