Behavior of Wringing Surfaces of Block Gauges

The behavior of the wringing surfaces of block gauges when wrung together has not been clarified quantitatively so far.Thus, the relationship between the wringing force and the amount of contraction is obtained by measuring the amount of contraction occurring when an external force is applied to the block gauges which are thoroughly wrung together and those which are not. Also the amount of elastic deformation developing on the contact section when the block gauges are wrung together is obtained by measuring the configurations of the wringing surfaces. Based on these, an analysis is made on the behavior of the wringing surfaces of the block gauges.1. When a load is applied to the wrung block gauges and a solid block gauge of the same size, no difference is seen in the amount of contraction between the two, but the amount of contraction on the block gauges which are not thoroughly wrung together is larger than that on the block gauges which are thoroughly wrung together.2. On the wringing surfaces of the block gauges when wrung together, the raised section and the recessed section of the surfaces are brought into contact with each other and this contact section undergoes an elastic deformation as it is pressed by the force equivalent to that required for separating the wringing surfaces. And the amount of this deformation roughly concurs with the Hertz's theory of elastic deformation.