The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2021
Filed:
Jul. 19, 2017
China Pneumatic Corporation, Taoyuan, TW;
Yu-Wei Chu, Taoyuan, TW;
Tai-Yun Chiang, Taoyuan, TW;
CHINA PNEUMATIC CORPORATION, Taoyuan, TW;
Abstract
In a torque control system and method for power impact torque tool, first establish a curve showing the relationship between the high/low working voltages of the tool in normal operation and the high/low torque values that are correspondingly output by the tool at the high/low working voltages. Input a target torque value that falls between the highest and the lowest torque value on the relationship curve to obtain a working voltage corresponding to the target torque value for performing a tightening operation. During the tightening process, a microprocessor of a torque control device receives and uses sensing signals instantly and continuously sent by a torque sensing device and changes in voltage, current and motor temperature continuously detected by a voltage/current sensing element and a temperature sensing element to stably control, via a voltage control module, the working voltage within a preset allowable range of variation for tightening torque control.