Patent ID: 6851300

Claim:
An apparatus for measuring residual stress, comprising: a main body; a load applying device installed within the main body to generate a load applied to a material to be measured; a load sensor for continuously measuring variation of the load applied to the material by the load applying device; an indenter holder connected to the load applying device and coaxially driven together with the load sensor; an indenter provided with a first end coupled with the indenter holder and a second end coming into contact with the material to apply the load generated by the load applying device to the material; a displacement sensor for continuously measuring variation of an indentation depth according to indentation of the indenter; an interface computer provided with a measurement program for measuring residual stress on the basis of values measured by the load sensor and the displacement sensor; an attaching device used to fix the material to be measured to the residual stress measuring apparatus, the attaching device being at least on of a magnet, a chain and a U-block; and a horizontal moving device for horizontally moving the main body with the indenter attached thereto in at least one direction after the attaching device is fixed to the residual stress measuring apparatus.