A Study on the Automatic Tool Change Mechanisms of Roller-Gear Cam Typer

• Main Authors: Kuo, Te-Chuan, 高德全
• Other Authors: 顏鴻森
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/43180611551463681861

碩士 === 國立成功大學 === 機械工程學系 === 85 === This work develops a systematic methodology to design and analyze a roller-gear-cam type automatic tool change mechanism for vertical machining centers, and a prototype is built for testing the feasibility of the design. The subsystems of the automatic tool change mechanism, the extract and insert tool mechanism, the roller gear cam mechanism, and the push and pull tool mechanism, are introduced first, and coordinate transformation matrix, universal motion curve, and input-output time diagram are presented in order to design the cams of the three subsystems. For each subsystem, the universal motion curve and the input-output time diagram are used to design the motion curve of the cam. Coordinate transformation matrix, differential geometry, and theory of conjugate surfaces are used to derive equations of cam surface and cam curvature. Kinematic analysis of each subsystem is developed, and the joint force of each subsystem are analyzed based on the result of kinematic analysis and Newton''s law. Final-y, a prototype is built for experimental testing. The results prove the proposed design is feasible.