Direct Calibration Chain for Hand Torque Screwdrivers from the National Torque Standard

Abstract

Hand torque screwdrivers are used for the fastening control of screws in almost all precise mechanical and electrical parts. This paper describes the realization of a direct calibration chain for hand torque screwdrivers traceable to the national torque standard. The calibration methods for a reference torque screwdriver using a primary torque standard machine, a torque screwdriver tester using the reference torque screwdriver, and hand torque screwdrivers using the torque screwdriver tester are described respectively. Uncertainty evaluation methods for each calibration level are also explained. The effectiveness of the calibration chain for hand torque screwdrivers could be demonstrated.

Towards a Modular and Wearable Support System for Industrial Production

“…Nowadays, a lot of technical systems exist in order to support (manual) activities in production. These include tools like screw drivers [6], lifting aids [7], industrial robots [8], systems based on human-machine cooperation [9], assistance systems [10] and exoskeletons [11]. All these systems have in common that they support, assist or help the staff in order to provide relief or to increase the overall productivity in producing organizations.…”

Screw torque traceability control: industrial application

“…According to Ogushi et al (2015) in almost all precise electrical and mechanical parts, hand torque screwdrivers are used for the fastening control of screws.…”