| 摘要 |
PURPOSE:To join firmly with a simple means by inserting the end part of a ceramic shaft into the end part of a metallic shaft and by deforming the end part of the metallic shaft with temp. rising condition along the unevenness of the ceramic shaft. CONSTITUTION:A groove 22 along the axial direction is formed on the end part of a ceramic shaft 21 and a pipe shaped part 24 is formed on the end part of a metallic shaft 23. The inner diameter of the pipe shaped part 24 is made large enough for the end part of the ceramic shaft 21 to be inserted. The end part of the ceramic shaft 21 is then inserted into the pipe shaped part 24 of the metallic shaft 23 and the pipe shaped part 24 is deformed so as to bite in the groove 22 with heating and temp. rising the end part of the metallic shaft 23. When the ceramic shaft 21 and metallic shaft 23 are let cool, the metallic shaft 23 is shrinked larger due to the difference in thermal expansion factor and the clearance between the outer periphery of the ceramic shaft 21 and the inner periphery of the pipe shaped part 24 is reduced, and the end part of the ceramic shaft 21 is fastened and both shafts are solidly joined. |
