Improvement of Diamond-Cutting Surface by Means of Porous Bearing Laminar Flow

Abstract

Air bearings had been widely used in ultra-precision machine tools. In order to suppress the micro-vibration caused by air bearing, an effective way is keeping the air flow in laminar state. Porous bearing to control the micro-vibration was proposed in this paper, and the related experiments show that it can meet the requirement of decreasing the micro-vibration to less than 1nm, and the surface of diamond surface can be improved.

Vortex suppression and nano-vibration reduction of aerostatic bearings by arrayed microhole restrictors

“…A rounded corner of the orifice outlet (Aoyama et al., 2006) was also claimed to be effective in suppressing the vortex flow and nano-vibration of the bearing. He et al. (2009) showed that porous restrictors can easily achieve flow laminarization and hence reduce nano-vibration of aerostatic bearings.…”

“…A rounded corner of the orifice outlet (Aoyama et al, 2006) was also claimed to be effective in suppressing the vortex flow and nano-vibration of the bearing. He et al (2009) showed that porous restrictors can easily achieve flow laminarization and hence reduce nano-vibration of aerostatic bearings. However, these methods are often limited by manufacturing capabilities: for example, porous restrictors with uniform pores with low permeability (<10 À12 m 2 ) are very difficult to manufacture.…”