| 摘要 |
PURPOSE:To set a load and a loading speed easily and as desired in a hardness test by connecting an electric rotary driving means to an indenter support through a reversing gear and speed reduction gear while a means of detecting a load applied on a sample by an indenter is provided. CONSTITUTION:A sample 23 is placed on a table 2a and a program memory 21 is specified for a main control section 12 from a keyboard 20. According to the program, a servomotor 16 is driven or controlled with a motor control section 15 or the like and a spindle 3 is lowered through a rotary motion-linear motion converting/speed reduction gear 19. The tip of the indenter 5 abbuts against the sample 23 on the table 2a. Additionally, a load applied is detected with a strain sensor 9 and inputted into the main control section 12 through a transducer 6 and an A/D converter 11 to be brought down to the reference load. After this condition is maintained for a specified time, a test load is applied and the depth of a pressure liquid is measured to determine the hardness, which is shown on a display 22. |
