| 摘要 |
PURPOSE:To achieve rigid fixing and to enable repeated usage by employing same material with the rotary shaft for the fitting section with the rotary shaft of target board while forming the fitting section with highly accurate fitting section and screwing section of relatively low accuracy. CONSTITUTION:Rotary anode for X-ray tube is formed by fixing a target board 3 having X-ray irradiating section to the rotary shaft 5 of target board 3. In order to equalize the thermal expansion factor, the section of the base body 10 of target board 3 to be fitted with the rotary shaft 3 is made of same material with the rotary shaft 3. The fitting section is formed with highly accurate fitting section 11 where the hole through the target board 3 and the diameter of the rotary shaft 5 have high dimensional accuracy and moderately accurate screwing section 12 where the threaded section of the rotary shaft 5 will rattle against the screw hole made through the target board 3. It is tightened by means of a nut 15. Consequently, highly rigid fitting can be achieved to enable usage of large and heavy target. |
