Features of high-speed cutting processes of blade metal cutting tools

Abstract

On the basis of a theoretical consideration of modern methods of high-speed machining of the surfaces of parts by end milling, research directions for further improvement of productivity and quality of machining are determined. The main reserve for increasing machining productivity is the reduction of the main technological time. Modern methods of high-speed machining provide an opportunity to increase productivity by up to 40% compared to traditional methods. Effective ranges of machining speeds are established for high-strength cast irons and hardened steels, aluminum and light alloys. The further need to optimize the designs of end mills for machining the flat surfaces of parts, the need for further design of high-speed spindle assemblies with a rotation frequency of up to 1666 Hz and the corresponding feed drives, which must ensure the speed of linear movements of the assemblies, the creation of reliable means of monitoring the state of end mills and quality is substantiated in the process of machining. The effectiveness of the use of a blade tool equipped with polycrystalline superhard materials has been proven, which makes it possible to reduce the value of the arithmetic mean height of the micro-uniformities of the treated surface to Ra=0.08 μm and to achieve machining accuracy tolerance of IT5-IT6 grade, to exclude negative structural changes in the surface layer of materials, to be processed, increase the machining productivity by 2-5 times compared to grinding. The use of milling machines with high dynamic stiffness makes it possible to reduce vibrations in the technological machining system and has a reserve for further increasing the cutting modes to ensure the required productivity and quality of machining and requires further research.

Keywords

• high-speed maching
• machining productivity
• machining quality
• face milling