METHOD TO FORM COMPOSITE SHOCK-ABSORBING RAIL Russian patent published in 2015 - IPC B66C7/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular, to the field of increased durability and resource of crane structures. A rail is made as composite, comprising a steel rail with a square cross section, a damping layer from low modular material and a foot expander with rows of holes with a regular pitch. The upper rail is rolled as square in the cross section, from alloyed steel, with two cantilever ledges. The lower shock-absorbing layer is cast by the method of continuous casting from low modular material, for instance, basalt, cast iron. The foot expander is made by rolling, stitching rows of holes with a regular pitch. On the flow line they slide the damping layer into the foot expander longitudinally and reciprocally with a rail installed on it so that the foot expander covers the rail and the damping layer at the bottom and at sides, and cantilever ledges of the rail are under cantilever ledges of the foot expander. High-resource alloyed countersunk bolts are inserted into each fifth hole in the foot expander, nuts on them are tightened, and a single high-resource rail is formed as ready for installation. The rail is mounted into a crane beam, free holes in the foot expander are matched with holes in the upper belt of the crane beam, high-resource alloyed pins are inserted into them. Using a nutrunner, nuts are tightened, connecting the composite shock-absorbing rail with the upper belt of the crane beam into a single high-resource crane structure.

EFFECT: invention provides for reduced material intensity of a rail, its improved stiffness characteristics and prevention of fatigue cracks in an area under a rail due to damping and shock-absorbing properties of a rail.

3 dwg, 1 tbl