Omron Corporation

Masayuki Sugioka

Koji Nishigaki

Tatsuya Sasaki

Takanori Shibutani

Yuki Sakamoto

Kota Miyamoto

Kento Tsuchikawa

Masayoshi Tsukikawa

According to the present invention, an axial force of a screw which is generated by screw driving is estimated. A control part applies a predetermined torque generated by a rotation axis servomotor to a screw in a rotation direction where a screw is driven, and thereafter releases the torque. The control part then estimates an axial force of the driven screw based on fluctuation of a rotation position of the rotation axis servomotor which occurs due to the release of the torque.

Screw driving device

The present invention provides technology with which it is possible to highly accurately assess the quality of fastening of a screw. The present invention comprises a position acquisition unit () that acquires the axial-direction position of a driver (), and a fault assessment unit () that assesses that a fault has occurred in fastening of a screw when the amount of change in the axial-direction position of the driver () from when temporary seating occurred is greater than a threshold value. The present invention provides a technology with which the quality of screw fastening can be assessed with high precision.

Screw fastening fault assessment device, screw fastening device, screw fastening fault assessment method, and control program

Provided is a technique capable of suitably determining screw fastening failure. A screw fastening failure determination device () includes: a speed acquisition unit () which acquires an axial speed of a screw driver or a speed feature value relating to the speed; and a failure determination unit () which determines, in a temporary seating process, that a screw fastening has failed on the basis of the axial speed or the speed feature value at a prescribed timing.

Screw fastening failure determination device, screw fastening device, screw fastening failure determination method, and non-transitory computer readable medium

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Kyoto, Japan

Masayuki Sugioka