Damage of Low Stiffness Thin Wall Milling and Analysis of Machined Surface Quality
In order to analyze the milling conditions of low stiffness thin wall,the cutting tests of low stiffness thin wall are conducted under small immersion ratio condition.Both the acceleration signals in thin-walled thickness direction and cutting force signals are gathered by the way of real-time monitoring.Tool wear,tool breakage and surface quality are ob-served by microscope.The experimental results show that the vibration of the cutting is very strong when the stiffness of the thin wall is low.At the same time,the acceleration values and the cutting forces in the x-direction rapidly increase with the feed rate.Tool blade breakage occurs earlier than wear because of the vibration,and there are many massive defects.Be-cause of its lower stiffness,the top of the thin wall has a large number of bar-shaped protrusions,which seriously affects the surface quality.And the lower part of the thin-walled surface processing quality is obviously superior to the upper part.Up-milling is better than down-milling at reducing the milling force and burrs.
thin walllow stiffnessblade breakagesurface qualitymilling force
万方数据
维普
