| 摘要 |
<p>PURPOSE:To form a highly precise screw hole, etc., without reducing the strength and obstructing the reduction in weight by pouring embedding material into a recessed part formed on a ceramic member, and making it solidify, and working this embedding material. CONSTITUTION:The recessed part 3 whose diameter is larger than the minor diameter of a female screw to be formed is provided, and ceramic member 1 is formed before hand by firing it. The prescribed quantity of low melting point metal 4 as the embedding material is melted and poured into the recessed part 3, and the recessed part 3 is filled. The, after the metal 4 is cooled and solidifies, the prepared hole 5 of prescribed diameter and depth is formed at a prescribed position. After that, the prescribed screw is worked by a proper tool or machine tool according to required precision. Thus, the screw hole 2 of the desired precision can be formed.</p> |
