METHOD OF HARDNESS CONTROL AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC G01N3/42 

FIELD: physics; measuring.

SUBSTANCE: offered group of inventions concerns to means for the control of hardness of materials of different classes. The offered method of the control of hardness is to examinee the sample indent with constant velocity the active tip of the indenter on the fixed depth equal to height of its active tip which is equal to height of a site of uprise on a cam and for loading of the indenter use the turning couple of the electromotor interreacting with a cam, thus checking of the power developed by the electromotor on which judge hardness of the examined sample is carried out. The device for the hardness control contains the electromotor, the cam kinematically related to the electromotor with a rectilinear site of uprise on an effective area and the indenter with the active tip interreacting with the cam and also a basic little table for the examinee of the sample, the control unit of power of the electromotor with function of an exception of cumulative power of losses is in addition entered, on a cam effective area there is a rectilinear site of decrease, the height of a site of uprise on a cam is equal to height of the active tip of the indenter, between sites of uprise and decrease on a cam there is a site of stable level.

EFFECT: possibility to check hardness of materials which basically cannot maintain an impression after removal of a loading with the indenter, for example the gums, some views of plastic, wood and composite materials etc.

2 cl, 3 dwg