Aiming at the problem of poor processing quality of SiCp/Al composite materials,this paper proposes a strategy of ultrasonic vibration assisted microscale machining.The SiC ceramic particle random distribution composite mate-rial model is constructed using Python software.The material removal mechanism of ceramic particles and aluminum alloy matrix is analyzed under ordinary scratching and ultrasonic scratching.On the basis of finite element simulation analysis,a Vickers indenter ultrasonic vibration scoring test is designed to study the scratching force,scratch surface morphology,and roughness.The research results indicate that SiC ceramics are mainly characterized by particle divorce and squeezing in or-dinary scratching,and particle damage in ultrasonic scratching.Ultrasonic vibration can effectively reduce scratching force and scratch roughness,thereby improving the processing quality of SiCp/Al composite materials.The average scratching force of ordinary scratching and ultrasonic scratching tests are 12.818N and 9.258N,respectively,with an error of 8.7%between simulation and testing.The average roughness values of ordinary scoring and ultrasonic scoring tests are 0.933μm and 0.581μm,respectively,with an error of 5.5%between simulation and testing.
关键词
铝基碳化硅/超声振动/划痕试验/有限元仿真/材料去除机理
Key words
SiCp/Al/ultrasonic vibration/scratching test/finite element simulation/material removal mechanisms
万方数据