As a representative elemental assembly technology, in addition to swaging technology, there is the "Screw Fastening technology". Below explains the fundamental technologies required for screw fastening automation.

(1)Configuration for screw fastening automation

In order to automate the screw fastening, the system configuration including the before and after processes of screw fastening needs to be clarified. The screw fastening automation configuration can be classified as the following.

(2)Main troubles regarding screw fastening automation

When the screw fastening automation main troubles are functionally classified into 3 parts according to the outline above, it will be as follows.

1)Troubles regarding automating screw parts feeding

	(1)	Automated screw parts feeding system (parts feeder, etc.) clogs
	(2)	Screw parts chucking misses (mis-gripping, dropping)
	(3)	Defective screw parts (Inadequate accuracies, burrs and anomalies, Mixed parts, Magnetization)

2)Troubles regarding automating screw fastening

	(1)	Abnormal fastening forces (Inadequate or excessive fastening forces)
	(2)	Abnormal stoppages due to feeding of defective parts
	(3)	Malfunction of automated positioning system

3)Troubles regarding screw fastening quality inspections

	(1)	Loosening
	(2)	Over tightening
	(3)	Poor appearance (Scratches, bending/tilting, etc.)

60% of the troubles is comprised of screw components misfeeds and improper automated fastening process.