The invention relates to a dismountable high-intensity pull riveting pin and a connecting and dismounting method. The pull riveting pin consists of a cap, a pin post, a short polished rod, a locking groove section, a
tail pin shaft, a sleeve ring and a
gasket. The single-groove
short tail with a continuous smooth arc surface pull groove is designed; the manufacturing is easy; the cost is low; the installation is convenient; three sections of circular arc surfaces with different radii are used. The problems of riveting
stress concentration and clamping of the
tail are solved. During the riveting, the end surface is positioned; the clamp claw is automatically engaged to the optimum position; the locking groove section thread type is a curve combining a circular arc with a straight line; the fastening force is greatly enhanced. A dismounting groove is formed in the root part of the cap, so that the cap fracturing and falling due to root part
stress concentration are effectively prevented. The depth of a hardening layer on the surface of the pin post is 2 to 6mm; the surface
hardness and the
wear resistance are effectively improved; the service life is prolonged. The pin shaft
short tail which cannot be broken through pulling and the high-intensity pin post are used for realizing the sleeve ring
cutting of a
cutting device; the dismounting is convenient; the repeated use of the pin shaft is convenient; the
utilization rate is improved; the use and maintenance cost is reduced; the dismountable high-intensity pull riveting pin is used for the connection and the dismounting in positions of antitheft locks of hinging structures, horseshoe-shaped hinging pulleys on a
train and the like.