把持面の表面形状に着目した切削用把持具の高性能化

抄録

The performance required of the cutting gripping tools (fixing tools for fixing work materials in cutting etc.) is that the position of the work material does not change due to the processing force (the work material does not move away), and the dynamic stiffness is high (the system has high damping property effective for suppressing chatter vibration). In this research, we focus on the friction damping that occurs at the contact surface between the work material and the surface of the tool, with the goal of achieving high damping among others. Specifically, the influence of the clamping force and the shape of the gripping tool on the friction damping ability is investigated, and the optimum gripping tool design method is searched. As an experimental method, frequency analysis was performed using a hammering test. In addition, in this research, the experimental system is assumed to be a primary vibration system of a spring mass damper. Consequently, it was found that the equivalent stiffness increases as clamping force increased, in contrast, the damping ratio decreases as clamping force increased. In addition, by comparison between the results in hammering vibration analysis with different shape grippers, it was found that the shape of grippers is the important factor to improve the gripping properties such as dynamic stiffness and damping effect.