Smoothing of Rock Surface by Percussive Crusher Driven with Solenoid (1st Report)

Machining Performance in Vacuum

Abstract

This report deals with the machining performance of rock samples in vacuum with a rock-crasher embedded in the science integrated package for future lunar exploration. A tool bit with pyramids driven with a solenoid was made from tungsten carbide. The generative impact force was 150 N at a driving frequency of 50 Hz device. The machining amount in vacuum was smaller than that in air because debris adhered on the tool by electrostatics. The tool temperature rose 4°C while the solenoid temperature rose 48°C.