Title:
SCREW TIGHTENING DEFECT DETERMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/235041
Kind Code:
A1
Abstract:
Even when a tapping screw is used in a soft material, it is determined whether or not a screw tightening defect has occurred. A PLC (10) comprises a determination unit (13) which for a rotational torque data sequence having a predetermined number of data points, generates a normalized torque data sequence that is the amount of change with respect to rotational torque at a first data point of the data sequence, and determines whether screw tightening is defective, on the basis of the normalized torque data sequence.
Inventors:
SASAKI TATSUYA (JP)
SHIBUTANI TAKANORI (JP)
SHIBUTANI TAKANORI (JP)
Application Number:
PCT/JP2021/007993
Publication Date:
November 25, 2021
Filing Date:
March 02, 2021
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
B25B23/14
Domestic Patent References:
| WO2015045871A1 | 2015-04-02 | |||
| WO2016042597A1 | 2016-03-24 |
Foreign References:
| JP2005095942A | 2005-04-14 | |||
| JP2013061695A | 2013-04-04 | |||
| JPS61182781A | 1986-08-15 | |||
| JPS6150777A | 1986-03-13 | |||
| JPS6420977A | 1989-01-24 | |||
| JP2016147317A | 2016-08-18 |
Attorney, Agent or Firm:
MURAKAMI, Takashi (JP)
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