Research on the consistency model of roundness error in journal cylindrical grinding with random parameters

Abstract

The accuracy consistency of the journal of the same batch of workpieces directly affects the interchangeability of products, cylindrical grinding is an important means to form the final machining accuracy of workpiece journals. Due to the grinding process system is susceptible to interference, for a given grinding system, the existing model cannot be used to evaluate the consistency of roundness error in the same batch grinding process. In this paper, the vibration coupling model of the cylindrical grinding process is established, and the iterative algorithm of “grinding force-instantaneous grinding depth” is proposed. On this basis, the grinding parameters are reflected in the coupling model of the grinding system with random characteristics within the design range, and the roundness error distribution of the same batch of workpiece journals after grinding is simulated by the Monte Carlo method to form a statistical analysis method of roundness error batch consistency. The validity of the proposed grinding roundness error consistency analysis method is confirmed by the corresponding grinding test. Finally, the influence of the grinding parameters on the consistency of roundness error after grinding is analyzed, and the research conclusions can provide reference for the design of grinding quality consistency.