2回締めのねじ締めに及ぼす効果

概要

論文の詳細を見る
Double fastening is a method to tighten screw in two successive steps, and known to be effective especially in clamping hard parts. Therefore, effects of double fastening on tightening screws were investigated by measuring the ratio of loosening torque to final torque T_l/T_<fin>. As a result, the followings were concluded. 1) The value of T_l/T_<fin> doesn't depend on the first setting torque and takes a constant value for all setting torques. 2) The values of T_l/T_<fin> for both double fastening and ordinary fastening don't depend on the setting torque and have a constant value. 3) The average of T_l/T_<fin> for double fastening is higher than that for ordinary fastening by 11%, which is a preferable tendency in tightening screw. It takes more time however for double fastening than for ordinary fastening by a time of the first fastening. Contraction of fastening time is a further problem.
帝京平成大学の論文
2003-06-25