Enhancing performance in bolt torque tightening using a connected torque wrench and augmented reality

TL;DR

This paper introduces an augmented reality and connected torque wrench system to improve the reliability and efficiency of bolted joint tightening in manufacturing, demonstrating enhanced performance over traditional methods.

Contribution

It presents a novel AR-based tightening method with a 6-DoF tracked torque wrench that improves accuracy and operator support in bolted joint assembly.

Findings

The AR system improves tightening accuracy.

Operators find the system acceptable and helpful.

The method ensures more reliable torque application.

Abstract

Modern production rates and the increasing complexity of mechanical systems require efficient and effective manufacturing and assembly processes. The transition to Industry 4.0, supported by the deployment of innovative tools such as Augmented Reality (AR), equips the industry to tackle future challenges. Among critical processes, the assembly and tightening of bolted joints stand out due to their significant safety and economic implications across various industrial sectors. This study proposes an innovative tightening method designed to enhance the reliability of bolted assembly tightening through the use of Augmented Reality and connected tools. A 6-Degrees-of-Freedom (6-DoF) tracked connected torque wrench assists the operator during tightening, ensuring each screw is tightened to the correct torque. The effectiveness of this method is compared with the conventional tightening method using paper instructions. Participants in the study carried out tightening sequences on two simple parts with multiple screws. The study evaluates the impact of the proposed method on task performance and its acceptability to operators. The tracked connected torque wrench provides considerable assistance to the operators, including wrench control and automatic generation of tightening reports. The results suggest that the AR-based method has the potential to ensure reliable torque tightening of bolted joints.