接着によって組立てられた旋盤主軸の特性

概要

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A main spindle of a lathe with center distance of 550 mm was assembled using adhesive glue. The lathe had gaps filled with adhesive between outer rings of bearings and spindle sleeves, and between the sleeves and a headstock. When the spindle was bonded, it was supported by micrometer heads to adjust its position. Following assembling accuracy was obi : ained : parallelism between the spindle and the carriage motion was 6-9.5 μm/300 mm, and height difference between the head and the tail stocks was 8-13 μm. Stiffness of the spindle was 13,20 and 22 nm/N for the conventionally assembled spindle, the one assembled using adhesive with low and high rigidity, respectively. A creep deformation of 6 μm occurred to the spindle assembled with low rigid adhesive under 170 Nm moment, but there was not such a problem to the spindle with high, ti rigid adhesive. Dynamics compliances of the conventional spindle and the spindle bonded with high rigid adhesive were quite equal, though that of the spindle with low rigid adhesive was higher than .the others at 200 Hz resonance. Results of numerical analyses showed that static compliance increased gradually and dynamic compliance decreased rapidly as the adhesive layer became thicker. If adhesive with less stiff and less viscous characteristics was used, dynamic compliance could be improved greatly with slight increase in static compliance.
公益社団法人精密工学会の論文
1984-09-05