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Related Experiment Videos

Torque reaction in angled nutrunners.

B Lindqvist1

  • 1R&D Applied Ergonomics, Product Safety and Liability, Atlas Copco Tools AB, Box 90 111, S-12021 Stockholm, Sweden.

Applied Ergonomics
|June 1, 1993
PubMed
Summary
This summary is machine-generated.

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The torque reaction from angled nutrunners causes handle displacement, varying with joint stiffness and operator grip. This displacement amplitude can quantify operator discomfort during tightening tasks.

Area of Science:

  • Industrial ergonomics
  • Mechanical engineering
  • Human-machine interaction

Background:

  • Torque reaction in angled nutrunners is a significant factor in operator strain during tightening.
  • Understanding the dynamics of this reaction is crucial for improving tool design and workplace safety.

Purpose of the Study:

  • To investigate the torque reaction dynamics of an angled nutrunner during joint tightening.
  • To analyze the relationship between joint stiffness, operator grip, and handle displacement.
  • To establish displacement amplitude as a quantifiable measure of operator discomfort.

Main Methods:

  • Experimental analysis of torque reaction in an angled nutrunner across various joint stiffnesses (hard and soft).
  • Measurement of handle displacement amplitude and time aspects in response to torque reaction.

Related Experiment Videos

  • Correlation of displacement characteristics with operator holding techniques and torque levels.

    • Main Results:

    • A rapid displacement of the angled nutrunner handle occurs during the final stages of tightening.
    • Displacement amplitude and temporal characteristics are significantly influenced by joint stiffness.
    • Operator grip and applied torque level affect the observed displacement patterns.

    Conclusions:

    • The displacement amplitude of the angled nutrunner handle serves as a reliable indicator of operator discomfort.
    • Joint stiffness and operator interaction are key determinants of torque reaction effects.
    • Findings can inform the design of ergonomic tools to mitigate operator strain.