STUDY OF THE FORMATION OF THE STRESS-STRAIN STATE OF THE SURFACE LAYER OF THREADED PARTS UNDER THE CONDITIONS OF THREADING WITH ULTRASONIC VIBRATIONS

Abstract

Background. A method and special ultrasonic devices are proposed that increase the efficiency of the technological process of threading, taking into account the features of the processing process. Materials and methods. A model of the stress-strain state of the surface layer of the thread cavity is presented, obtained from the results of an experiment with varying types of ultrasonic vibrations, which made it possible to evaluate their influence on the formation of the stress-strain state of the surface layer formed in the thread cavity. Results and conclusions. The main results of the work are illustrated by diagrams of the distribution of residual stress fields in the hardened surface layer of the thread root.

Keywords

• stress-strain state
• residual stresses
• thread
• ultrasonic vibrations
• hardening of the surface layer