| 摘要 |
<p>PURPOSE:To prevent a head from being attracted to a magnetic disk surface by roughing a floating rail surface in a floating rail by means of an electrical erosion-arc machining process in use of a working fluid containing fine abrasive grains. CONSTITUTION:Utilizing an electrical erosion-arc machining process which has used a working fluid containing fine abrasive grains capable of selectly grinding a part of the surface of a workpiece, a rotating polyurethane ball 17 is pressed to a floating rail surface 4 of a floating slider with a load of almost 30-50g in the working fluid 13 in which the specified fine abrasive grains are uniformly dispersed, whereby it is approximated to an interval of about 1mum or so. With a fluid bearing-like flow produced at this time, the fine abrasive grains in the working fluid 13 collide with a minute area at high speed in the horizontal direction and slide thereon. With this action, an optional minute area on the floating rail surface 4 is cut off so that roughening work is made possible. Accordingly, only the floating rail surface 4 that avoided a magnetic pole part of a magnetic head element being exposed on an extension surface of the floating rail surface 4 and the neighborhood can be roughened in a selective manner.</p> |
