INVESTIGATION OF CUTTING FORCE DURING BORING OF SCREW NON-RIGID MACHINE PARTS

Rostyslav  REDKO; Oleksandr  POVSTYANOY; Roman  POLINKEVICH; Taras  CHETVERZHUK; Olha  ZALETA

doi:10.36910/automash.v1i20.1030

Rostyslav REDKO PhD in Engeneering, associate professor, head of Applied Mechanics and Mechatronics department, Lutsk National Technical University https://orcid.org/0000-0001-5066-0224
Oleksandr POVSTYANOY DSc, professor of Applied Mechanics and Mechatronics department, Lutsk National Technical University https://orcid.org/0000-0002-1416-225X
Roman POLINKEVICH PhD in Engeneering, associate professor of Applied Mechanics and Mechatronics department, Lutsk National Technical University https://orcid.org/0000-0002-4243-5585
Taras CHETVERZHUK PhD in Engeneering, associate professor of Applied Mechanics and Mechatronics department, Lutsk National Technical University https://orcid.org/0000-0002-4445-4632
Olha ZALETA PhD in Engeneering, associate professor of Applied Mechanics and Mechatronics department, Lutsk National Technical University https://orcid.org/0000-0002-0777-9972

DOI: https://doi.org/10.36910/automash.v1i20.1030

Abstract

In the work, the peculiarities of boring of screw workpieces are described. The regularities of the processes of boring screw non-rigid parts have been established. The specifics of the design of the equipment for boring screw non-rigid parts and the expediency and prospects of using screw workpieces are substantiated. It is based on theoretical and experimental studies. A theoretical generalization and a new solution to the scientific and technical problem expressed in the development and creation of technological processes for processing non-rigid screw workpieces, are presented. This will make it possible to ensure the expansion of technological capabilities and the improvement of technical and economic parameters. Calculations were carried out using a package of applied statistical programs for processing and analyzing the results of experimental studies for a PC. According to these results, the dependences of the response surfaces of the optimization parameter and the two-dimensional section of the response surfaces were constructed and analyzed for a visual representation of the results of the experimental studies. The dependences of the change in cutting force on feed and cutting depth were constructed and analyzed. The dependences of the optimization parameter, that is, the dependence of the cutting force on the change of one input factor with a constant value of the other two factors, were also substantiated. After carrying out research using the program «Statistika», a two-dimensional section of the response surface of the dependence of the cutting force on the feed and depth of cut and the response surface of the dependence of the cutting force on the feed and depth of cut were constructed. The obtained experimental broken line was built based on the results of the conducted research. Approximation of it was carried out according to known standard methods, while the amount of deviation (mismatch) was determined by the method of least squares.

Key words: cutting process, feed, cutting depth, nature of loads, boring process, statistical analysis, lathe and screw-cutting machine.