Industrial Technology Research Institute

Chih-Hua Cho

Hsin-Hung Lee

Hsin-Chuan Su

Wan-Lung Lee

Wei-Min Chen

A calibration method/system and verification method for digital torque tools are disclosed, in which the calibration method comprises the steps of: transmitting a data containing usage records of a digital torque tool at a client end to a remote calibration platform; comparing the data of usage records with statistic data stored in the calibration platform so as to obtain a data relating to average degree of fatigue; performing a calculation based upon the data of usage record and the data of average degree of fatigue so as to obtain a calibration data; transmitting the calibration data to the client end while allowing the calibration data to overwrite the corresponding original torque data of the digital torque tool.

Calibration method/system and verification method for digital torque tools

The present invention relates to a digital power torque wrench of indirect transmission, which is composed of an eccentric driving module, a sensing module, a ratchet module and a control module. The eccentric driving module is used for transmitting power to the sensing module and the ratchet module for driving the ratchet module rotate accordingly and thus transferring the momentum of the rotating to fasten a workpiece, such as a bolt or nut. The sensing module is capable of detecting the deformation of the ratchet module as it is rotating against an increasing resistance during the fastening process, and converting the detected deformation into a signal to be received by the control module. The control module is capable of quantifying the signal for converting the same into a numerical signal representing a torque detected by the sensing module and then sending the numerical signal to a display device for displaying. With the aforesaid digital power torque wrench of indirect transmission, not only the detection can be achieved in a rapid manner without being troubled by wear-and-tear and noise, but also it is ease to maintain and can be manufactured with comparatively less cost.

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Nantou County, Taiwan

Chih-Hua Cho