Finite Element Analysis And Experiment Of The Clamping For Indexable Carbide Cutting Tools

With the rapid development and progress of metal cutting technology, indexable carbide cutting tools are widely used in automobile, aerospace, mold machining industries. Higher requirements of cutting tools are needed for the cases with high speed, large cutting feed, large cutting depth and without lubrication. However, the poor working conditions of the cutting tools are likely to lead to failure situations. It is meaningful to research the reliability of the indexable tools for improve the efficiency and safety of machining.The reliability of clamping is one of the most important content in the design of cutting tools. S class screw clamping, is simple and space saving, has only one clamping part. Therefore, it is widely used in small size cutting tools, as well as turning tools and milling cutter indexable cutting tools. This paper studies the reliability of screw type clamping tools in the cases of preload process and cutting process by using mathematical analysis and finite element simulation, while the results are verified by experiments.The main works of this thesis are as follows:Firstly, we review the research works of cutting tools reliability and clamping reliability. The theory of reliability and stress- strength interference the theory are mainly introduced.Next, has carried on the finite element simulation to turning tools, analysis under different F₀ preload and eccentricity e of blade, cutting body and screw stress, strain and displacement situation, it is concluded that in the process of cutting screw is the most prone to failure of the parts. On this basis, the mathematical model of the deformation of screw is established. Using this model can calculate the deflection of the screw more accurately in preloaded process. Besides, design and optimization the screw blade clamping groove.Finally, by single factor experiment of preload force and eccentricity, wear resistance and impact resistance test was carried out on the turning tools, by observing the blade wear and shock resistance, it is concluded that during 2500-3000 N preload force clamping effect is best. By turning test under the conditions of different eccentricity e, to verify e = 0.15 mm and e = 0.2 mm is the most reliable clamping, and can got the best cutting effect.