Apparatus for calibrating hardness tester, method for calibrating the same and apparatus for evaluating dynamic characteristic of specimen

An apparatus for evaluating a dynamic characteristic of a specimen, which is installed in a hardness tester having a force applying member and a specimen table, the apparatus comprising:

• an indenter;
• a force transmitting portion that receives a force from the force applying member and transmits the force to the indenter to urge the indenter into pressing contact with the specimen placed on the specimen table;
• a force measuring member for continuously determining forces of α applied to the specimen from the indenter;
• a distance measuring member for continuously determining deformed amounts of h of the specimen in an acting direction of the forces of α;
• wherein the force applying member displaces a movable portion, including the force transmitting portion, the force measuring member and the indenter, in an acting direction of the force, and when the force from the force applying member is applied to the force transmitting portion and displaces the movable portion, the indenter forms an indentation in the specimen, and the apparatus caries out an evaluation of the dynamic characteristic of the specimen based on (a) continuous values of the forces of α which are determined based on the measured values measured continuously by the force measuring member and (b) continuous values of the deformed amounts of h which are determined based on measured values measured continuously by the distance measuring member, and
• the apparatus further comprising
• a position adjusting member to adjust a position of the movable portion;
• wherein the position adjusting member comprises:
• a first axis;
• an arm capable of pitching pivotally on the first axis, the movable portion is movably connected to one end of the arm;
• a fixing plate attached to the other end of the arm;
• a receiving plate of which a position being fixed;
• and
• a clamping screw connected to the fixing plate, a screw portion of the clamping screw being screwed to the receiving plate,
• wherein when the clamping screw is clamped or loosened, the arm is pitched and the movable portion is freely moved and returned by a pitch of the arm.