| 摘要 |
PURPOSE:To make it possible to perform accurate pull tests all the time by assembling a pull-test pin which can be rotated by an angle theta and moved in the direction Z, a displacement-force transducer and a sensor into a pull-test head which can be moved in the direction of Z independently with respect to the Z movement itself. CONSTITUTION:A pull test head 12 is moved on a straight line in the direction of the Z zxis with a pull-test-head driving motor 10 and a guide rail 11. An arm 13 is attached to the pull test head 12. A pull test pin 14 is attached to the tip of the arm 13. A hook part 15 is provided at the tip of the pin 14. The hook part 15 can be turned around an axis which is in parallel with the direction Z with a pull-test-pin rotating motor 16. The turning is designated as theta. As an element for transducing the displacement of the arm 13 with respect to the head 12 in the direction Z into a force, a spring 18 is attached. A sensor 19 is provided so as to detect said displacement. In this constitution, the movement of the pin 14 performs strictly straight motion in the direction of the Z axis. Therefore, the force which pulls a piece of wire always acts in the direction of the Z axis. Thus the accurate pull test load can be applied all the time. |
