Expanding the Scope of appLication of Super Hard Cutters in Mechanical Assembly Shops of Machine-building Plants and Service Enterprise Sections
Year: 2025
Type: article
Abstract: The study investigates the application of burnishing as a cost-effective finishing method for machine parts. Aimed at replacing grinding in manufacturing and repair conditions. A special focus is placed on the reuse of worn cutting tools made of hexanit-R (cubic boron nitride), whose cores can serve as effective burnishing tools, reducing costs while maintaining quality. Experimental research was carried out on cylindrical specimens of 40X steel (30 mm diameter). A special tool holder was designed to provide elastic too-workpiece contact. Burnishing parameters included forces from 300 to 700 N, edge radii from 2 to 10 mm, feed of 0.05 mm/rev, three passes, spindle speed 630 rpm. Surface roughness was measured with a profilometer, while hardness was evaluated using the HRC scale. Elastic contact ensured process stability and prevented surface defects observed under rigid contact. Results demonstrated a reduction of initial roughness from Ra = 2.5 µm to Ra = 0.16 µm, depending on the tool edge radius, along with an increase in surface hardness by 2-4 HRC. The best balance between roughness reduction and hardening was achieved with an edge radius of 4-6 mm and three passes. The study proposes the innovative reuse of worn hexanit-R cutting inserts as burnishing tools. This method prolongs the lifespan of costly superhard materials and creates a new opportunity for incorporating too recycling into surface engineering. This approach extends the service life of expensive superhard materials and opens a new pathway for integration tool recycling into surface engineering. The results offer a cost-efficient option for processing hardened steels and cast irons without grinding. Implementing this method in repair workshop with limited machine tools offers improved accuracy, enhanced durability of parts, reduced maintenance costs. Burnishing using repurposed hexanit-R tools is a practical, economical, sustainable finishing solution. It ensures high surface quality and strengthening of machine parts, making it especially valuable for service enterprises. Further work will focus on modeling and optimizing burnishing parameters for steel of different grades.
Authors: Stanislav Popov, Oleksandr Kanivets
Institution: Poltava State Agrarian University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7117547569