3154 ねじ締結性能評価のためのトルクセルの開発 : 誤差要因の解析と精度向上(S35-2 機械要素の設計・製造・応用技術(2) 部材の締付け・圧縮特性,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

論文の詳細を見る
Tightening experiment for evaluating tightening characteristics is one of the most important issues to boost the reliability of bolted joints. However, the conventional testing machines have some problems in terms of the accuracy, the applicability and/or the rigidity to perform the experiment specified in ISO 16047. In the previous study, the load cell system using piezo electric sensors was proposed to resolve such problems. However, there is one problem left on the accuracy of separate measurement for thread torque and bearing surface friction torque. The aim of this study is to investigate the cause(s) of measurement error, and to develop the new torque cell system by eliminating such causes. Analysis and experiment have been performed to clarify the relationships among torques and clamp force, and to point out the probable causes. Finally, it is found that the error (change of the sensitivity of torque sensors) to be removed is not caused by the characteristics of the torque sensors themselves, but may be caused by the cross talk of torques acting on two preloaded joint bodies including preloading bolts, torque sensors, and upper and lower plates.
一般社団法人日本機械学会の論文
2008-08-02