サーボシンクロ方式工作主軸台を採用した高精度クランクピン研削盤の開発

概要

論文の詳細を見る
Crankpin grinding differs from ordinary cylindrical grinding processes. Because, the center of pin portion has extreme offset from the center of journal portion. So, the left and right work spindles are required to have a mechanism for clamping and driving the journals by means of eccentric chucks on both sides of the crankshaft. With such an eccentric work spindle drive system, synchronization accuracy of the work spindles has influence on the roundness, phase accuracy, and several other characteristics of the crankpin grinding accuracy. To cope with these problems, it was developed a servo synhro-drive system, which drives the work spindles independently with AC servo motor, compensating for the phase difference between the two work spindles with the NC system. This paper first discusses several factors which prevent the achievement of high-speed high-accuracy crankpin grinding when the conventional work spindles is used. Secondly, it proposes the newly developed work spindles using a servo synchro-drive system for the purpose of achieving high synchronization accuracy. Finally, it describes the grinding results obtained. by crankpin grinder equipped with the newly developed work spindles.
公益社団法人精密工学会の論文
1991-06-05