Opening Wave Strain Strengthening

The scheme for the wave strain strengthening of inner cylindrical surfaces diameter up to 100 – 120 mm is offered. One-ring and multi-ring drifts, bolls of various diameters are used as a tool. The effectiveness of a dynamic influence upon the center of deformation is considerably higher than that of the static one used during common burninshing. At the same time the share of power spent for the plastic deformation increases and power intensity drops, and technological possibilities of the process become wider. The experimental research of wave deformation strengthening at different diameters of openings in bushes with different wall thickness revealed that the process is realized in a wide range of tightnesses from 0.5 to 3 mm which is necessary to choose taking into account the wall thickness, and strengthening embraces the whole wall thickness (up to 20 mm) under certain conditions. A considerable decrease of roughness height parameters of the strengthened surface and profile bearing length increase are established. The formation of oil pockets takes place on a surface worked as a consequence of kinematic peculiarities of the wave strain strengthening that contributes to wear resistance increase of friction couples. The productivity of wave strain strengthening exceeds the productivity of common burnishing more than twice, and there appears a possibility to exclude the operations of finishing abrasion with unfavorable technological heredity from the engineering procedure.