Automated assessment of the influence of technological dimensioning schemes on their accuracy

The study determined the influence of various factors and processing conditions on the value of the mutual error com-pensation coefficient of technological dimensions during turning. To investigate the impact of mutual error compensation on the accuracy of the resulting dimensions, the analysis of their formation schemes during machining on CNC machines was performed. Automated evaluation of the influence of technological dimension formation schemes on their accuracy using com-puter simulation was carried out.Conditions and methodology for computer simulation of machining processes were formulated. Algorithms and the special-ized program for simulating the dispersion of technological dimension values were developed. Simulation in the program allowed determining the effect of mutual error compensation of technological dimensions on their accuracy for different machining schemes. To ensure reliable results, simulation was repeated three times for each processing condition. Based on the obtained data, average values of mutual error compensation coefficients for different machining schemes and conditions were calculated. Graph-ical and analytical dependencies were constructed, reflecting the influence of the machining scheme, cutting conditions, and work-piece material hardness on the mutual error compensation coefficients. The obtained compensation coefficient values and their determination dependencies are necessary for consideration when assessing accuracy of technological dimensions.It was found that mutual compensation values and corresponding coefficients are significantly higher when machining with a set of tools compared to machining with a single tool under CNC programming.Examples of calculating the accuracy of the closing link in the operational dimensional chain are provided. It is shown that using the recommended mutual error compensation coefficients for technological dimensions significantly improves pre-dictive assessment quality of closing links—design dimensions—by bringing them much closer to real values. Predictive accu-racy, when accounting for mutual error compensation coefficients, is more than twice as high as in calculations without con-sidering error compensation.The improved prediction accuracy offered by the methodology presented in this work allows for the more substantiated approach to structuring technological processes. This ensures increased productivity and reduced machining costs while achieving the required dimensional accuracy.