Apparatus for measuring hardness of materials

摘要

An apparatus for measuring hardness of materials has an indentor to be pressed into the surface of material, a rod in the form of a center plate having a shank rigidly secured to one end thereof and the indentor rigidly secured to the other end thereof. The apparatus also has a dynamometric gauge having a first branch thereof with a hole in which the shank of the rod is received. A second branch of the dynamometric gauge supports a spindle of a device for loading the indentor. One of the branches of the dynamometric gauge carries at least one pick-up for measuring the load at the indentor engageable with the other branch of the dynamometric gauge. The apparatus also has a device for measuring the depth of penetration of the indentor into the surface of material in the form of a frame having its opposed bars enclosing the first branch of the dynamometric gauge. A tip is rigidly secured to the first bar of the frame located between the surface of material and the first branch of the dynamometric gauge, the indentor being received in the tip. The first branch of the dynamometric gauge carries a pick-up for measuring the depth of penetration of the indentor into the surface of material engageable with the frame.