SELF-TAPPING SCREW FASTENING APPARATUS

摘要

An apparatus in which a threaded fastener is automatically attached to an article. The apparatus positions the threaded fastener in contact with the article and applies a torque thereon. A signal is generated indicating the torque level. The signal is compared to preset limits. Different preset torque limits are set for tapping threads in a hole in the article and securing the fastener thereto.