| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a sliding surface having high lubricity with simple machining instead of scraping. <P>SOLUTION: A bed of a machine tool is cast using spheroidal graphite cast iron of FCD450, and its sliding surface is ground into a flat surface by machining. The sliding surface of a column to be put on the bed is also ground into a flat surface in the same manner. The spheroidal graphite appears on the sliding surface and, by ejecting water jet to the sliding surface, the spheroidal graphite on the sliding surface is removed. Since the size of the spheroidal graphite is within the range of 5-80 μm, the size of a minute recessed part after removing the spheroidal graphite is nearly the same as that of the spheroidal graphite. Since the minute recessed part serves as an oil reservoir of lubricating oil, an oil film is uniformly formed between the sliding faces and the sliding face has high lubricity. <P>COPYRIGHT: (C)2012,JPO&INPIT |
