A41 工具把持トルク計測に基づくコレットチャック締付け過程の合理的管理法の提案(OS-3 工具・ツーリング(2))

概要

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For a collet chuck, the tightening condition of a nut greatly influences the tool chucking characteristics. Therefore, the management of the tightening of a nut is important to use collet chucks properly, and then, a torque wrench is often used. However, even if the value of the wrench is the same, the actual tightening force is not necessarily same since it is influenced by lubrication, etc. In this study, the test tool built in strain sensor system is designed to measure the tool chucking torque. Furthermore, the rational management method of the tightening process of collet chucks is examined experimentally. As a result, the following have been made clear. The chucking torque can be determined based on the strain generated on the inside surface of the test tool. With this measuring system, it is confirmed that the chucking torque is in proportion to the tightening torque of a nut. Therefore, the chucking torque is able to control with the calibration result based on the relationship between the chucking and the tightening torques. However, the tool chucking torque is greatly different depending on the lubrication condition of the nut. Therefore, it is necessary to determine the relationship between the tightening and the chucking torques including the influence of lubrication condition.
2008-11-21