Technological Inheritability of Parameters of Surface Engineering of Products After Vibrational-Centrifugal Hardening

Modern technologies of products manufacturing are identical to the processes of transformation (technological inheritability) and preservation (technological heredity) of properties of mechanical engineering objects under the appropriate influences of the elements of the certain technological media: metal-cutting machine – clamping device – metal-cutting tool (s). The characteristics of the machined material and the parameters of surface engineering as carriers of inherited information are transformed under the influence of dominant technological factors during the performance of technological operations, technological steps, etc. In this paper, the technological inheritability of surface engineering parameters is investigated after passing the “technological barrier” – surface plastic deformation of the cylinder bushings of drilling pumps at the final operation of their manufacture. Improvement of microreliefparameters of executive internal cylindrical surfaces of bushings operating under conditions of intense abrasive wear, is ensured by replacing traditional abrasive machining with vibrational-centrifugal hardening, implemented on vibrational machine of volumetric machining. Step-by-step machining using vibrational treatment by means of deformable bodies of two standard sizes – steel balls ∅10 mm, ∅8.5 mm, cleaning usinguralite and modification of the inner surface using hard alloy DIN (WNr, HG30, HG40) improves the high-altitude roughness parameters (Ra, Rz, Rq, Rp) by 4.9–9.2 times compared to the corresponding values after finish turning. At the same time, the value of relative profile reference length tp increases from 0.5222 (after final turning) to 0.7486 (after the last technological step of the final technological operation) which ensures the formation of a wear-resistant operational relief.