METHOD FOR PROCESSING WORKPIECE TO OBTAIN STEPPED SHAFT WITH LENGTH TO DIAMETER RATIO OF MORE THAN 10 Russian patent published in 2021 - IPC B23B35/00 C21D9/30 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to a method for processing a workpiece to obtain a stepped shaft with a length to diameter ratio of more than 10. The method includes machining the workpiece in self-centering rests and heat treatment in a shaft furnace, including quenching, tempering and air cooling. The workpiece is machined by grinding along the outer surface to create a base surface, then grooving of the grooves to create ribs is carried out, while the grooves are grooved to the diameters of each step with the tolerance for finishing, then the ribs are ground equidistantly to the profile of the shaft being produced by the value of the maximum design rib diameter at all stages of the shaft being produced, the subsequent heat treatment of the workpiece is carried out in a vertical position until the specified mechanical properties of the workpiece metal are achieved, and after heat treatment of the workpiece, finishing turning is carried out to the specified diameter of each stage of the produced shaft, while before machining the number of ribs N for each stage is calculated according to the formula: N=1/(t+t₁) where t is the rib thickness, t₁ is the gap between the ribs, and the ribs are machined taking into account the ratio S₁/V₁=S₂/V₂, where S₁, S₂ - the total surface area of the ribs of two adjacent steps made driven shaft; V₁, V₂ - surface areas of the specified two adjacent stages of the shaft being manufactured.

EFFECT: creating a method for processing a workpiece, providing stabilization and minimization of the level of residual stresses, and increasing the operational accuracy of low-rigidity shafts.

1 cl, 3 dwg