DEVICE FOR BURNISHING OF SCREWS Russian patent published in 2009 - IPC B24B39/04 

FIELD: machine building.

SUBSTANCE: invention is related to technology of machine building, namely, to finishing of screw blanks by surface plastic deformation. Device comprises body and working deforming elements arranged in the form of helical cylindrical spring turns. Spring is installed on elastic base on axis, freely rotates in body bearings and is installed between processed screw blank and guide block. Guide block has the shape of processed screw and is displaced in longitudinal direction by half of screw pitch. Guide block is arranged with the possibility to provide forced rotation from blank with the speed equal to blank speed. In diametrally opposite place relative to guide block blank rests on support holder having support roller. Axes of support holder roller, blank, spring and guide block rotation are parallel. Interaxial distance between blank and guide block is calculated according to formula given in description.

EFFECT: technological resources of surface plastic deformation process are expanded, roughness parameter of processed surface is increased, its hardness is increased, as well as efficiency, and processing cost is reduced.

6 dwg, 1 ex