Laboratory Complex for Precision Measurements of Phase Transitions in the Contact Zone and Emissions of Dispersed Pollutants during Machining and Manufacture of Cutting Tools
摘要
The study presents a design for a laboratory complex for precision measurements of phase transitions in the contact zone and emissions of dispersed pollutants. The complex is an integrated hardware-software platform designed for the tasks of measuring the distribution of dispersed particles (particulate matter, PM) by size (spectra), in real time, collecting samples, and preparing them for further measurement by electron microscopy and other modern methods to determine their physical and chemical properties. This complex has a measurement range of 5 nm–10 μm and provides high-precision measurement of the spectra of the most chemically active and toxic ultrafine particles (UFP or PM0.1) down to 5 nm, which are not only the most important component of dispersed pollutants that accompany machining processes, but also serve as a diagnostic feature for determining the state of the environment and phase transitions in the tool-workpiece contact zone when removing material from the surface using mechanical action, spark discharge, laser radiation, and other methods. Since changes in process modes (material removal conditions) are accompanied by changes in the spectrum of dispersed particles formed when phase transitions occur in the contact zone, they can be used to select rational process modes and solve problems of process control. On the other hand, monitoring dispersed pollutant emissions and taking their samples at workplaces followed by further analysis of these samples can significantly increase the effectiveness of protective measures and reduce the hazardous effects of dispersed pollutant emissions on personnel health. The study substantiates the choice of the tools included in the complex, describes their functionality and application for solving the above problems of process control and environmental safety in modern production conditions, and draws a conclusion regarding the effectiveness of the complex for solving problems of production process control and personnel health protection associated with the emission of dispersed pollutants formed in the course of metalworking production processes.