Three-segmentation rolling guide centering sample rod and application thereof

The embodiment of the invention provides a three-segmentation rolling guide and guard centering sample rod and application thereof.The three-segmentation rolling guide and guard centering sample rod comprises a sample rod body and an ejector pin, the ejector pin and the sample rod body are coaxial, and the ejector pin is arranged on one end face of the sample rod body; the shape of the section, perpendicular to the axis, of the sample rod body is matched with the shape and the size of a K5 box-shaped hole in a three-slitting rolling hole pattern system. The section, perpendicular to the axis, of the ejector pin is round, the radius R is equal to L-S, L is the radius corresponding to the upper arc or the lower arc of the K4 pre-segmentation hole type middle groove, and S is equal to 0.5-1.0 mm. Compared with the traditional visual inspection and experience operation, the guide centering adjusted by the sample rod for three-segmentation rolling guide centering has the advantages that the guide centering effect