US 12,365,067 B2
Detecting tightening tool performance deterioration
Staffan Aldenfalk Jansson, Solna (SE)
Assigned to ATLAS COPCO INDUSTRIAL TECHNIQUE AB, Stockholm (SE)
Appl. No. 18/703,057
Filed by ATLAS COPCO INDUSTRIAL TECHNIQUE AB, Stockholm (SE)
PCT Filed Sep. 19, 2022, PCT No. PCT/EP2022/075964
§ 371(c)(1), (2) Date Apr. 19, 2024,
PCT Pub. No. WO2023/072480, PCT Pub. Date May 4, 2023.
Claims priority of application No. 2130288-0 (SE), filed on Oct. 26, 2021.
Prior Publication US 2024/0335926 A1, Oct. 10, 2024
Int. Cl. B25B 23/147 (2006.01); B25B 21/00 (2006.01); B25B 23/145 (2006.01); G01B 5/00 (2006.01)
CPC B25B 23/147 (2013.01) [G01B 5/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A computer-implemented method for detecting an indication of a tightening tool deteriorating in tightening performance executed by one or more control devices comprising:
(a) acquiring, via one or more torque measurement sensors, at least one set of observed values of a final torque having been applied by the tightening tool to an object to be tightened over a first time period;
(b) determining whether or not an overshoot metric of the observed values in the at least one acquired set with respect to a target torque exceeds a predetermined overshoot threshold value, wherein the predetermined overshoot threshold value is set to have a value being in a predetermined range of allowable torque values that may be applied to the object to be tightened, said predetermined range of allowable torque values being classified to represent OK tightenings, the range being lower than a maximum allowable torque value classified to represent not OK, NOK, tightenings; and if so
(c) providing an alert to at least one of an indicator associated with the tightening tool or to a remote computing system that an indication of performance deterioration of the tightening tool has been detected and that maintenance of tool may be needed; and
(d) repeating at least operations (a) and (b) over a subsequent time period, if the predetermined range of allowable torque values being classified to represent OK tightenings.