US 11,999,024 B2
Screw fastening fault assessment device, screw fastening device, screw fastening fault assessment method, and control program
Masayuki Sugioka, Kyoto (JP); Tatsuya Sasaki, Otsu (JP); Koji Nishigaki, Kusatsu (JP); and Takanori Shibutani, Otsu (JP)
Assigned to OMRON Corporation, Kyoto (JP)
Appl. No. 17/424,880
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Feb. 20, 2020, PCT No. PCT/JP2020/006802
§ 371(c)(1), (2) Date Jul. 21, 2021,
PCT Pub. No. WO2020/175316, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-034207 (JP), filed on Feb. 27, 2019.
Prior Publication US 2022/0080540 A1, Mar. 17, 2022
Int. Cl. B23P 19/06 (2006.01); B25J 9/16 (2006.01)
CPC B23P 19/066 (2013.01) [B25J 9/1679 (2013.01)] 9 Claims
OG exemplary drawing
 
9. A non-transitory computer readable recording medium storing a control program which is executed by a computer to:
acquire an axial position of a driver; and
assess that a fault has occurred in screw fastening when an amount of change from a first position to a second position in the axial position of the driver is greater than a threshold value during a final fastening process;
wherein perform the final fastening process from a time of temporary seating after a screw is inserted into a screw hole and the screw is temporarily seated; and
wherein the first position is an axial position of the driver when the screw is temporary seated, wherein the second position is an axial position of the driver in the final fastening process after the screw is temporarily seated.