2323 A New Tightening Method of Bolted Joint applying tensile force to the Bolt

Clamping force of bolted joints greatly influences strength of bolted joints. However clamping force of torque control method as tightening method well known varies widely. In this study, a new tightening method of bolted joints to accurately control the clamping force has been proposed. The proposed method tightens bolted joints by applying the same tensile force as the target clamping force to the thread part of bolt protruding through the nut. Experiments to verity the usefulness of the proposed method have been performed. The result show that the proposed method can accurately tighten bolted joints with an error of approximately ±10% against the target.