Investigation On Process Experiments Of Ultrasonic Precision Machining Microwave Ferrite Microporous

With the development of modern industry,ceramics and composite materials have been widely used in automobile industry,aerospace,national defense,medical equipment and so on.Most ceramics and composite materials are abrasive and brittle materials.In traditional machining method,it is hard to reach the machining requirements.So it is urgent to take an effective machining method for brittle materials.In this paper,rotary ultrasonic assisted machining was proposed to machine hard and brittle materials.Microwave ferrite materials was selected to be the typical brittle materials.Details are included as below.Ultrasonic head was developed based on the characters of micro-hole rotary ultrasonic machining of hard and brittle materials.It consists of special handle,transducer,amplifier,high-speed ring et al.In order to assemble conveniently,orifice throttling technology of static pressure gas was used,which optimize the structure of pneumatic flotation workbench.The ultrasonic vibration system and load matching system were integrated in an electrical control cabinet.A special software controlling platform was established based on MFC.An experimental platform of precisely holing was built and three kinds of ferrite materials was machined on it as typical brittle material.It mainly includes cutting tool single-factor experiment,ultrasonic single-factor experiment and the influence test of material properties on machining quality.The experimental results showed that the stability of electroplating diamond cutting tool in the drilling process of garnet ferrite was higher,and the introduction of ultrasonic vibration could improve the surface roughness and the hole aperture,the fracture toughness and hardness of the material had important influence on the machining quality.Finally,systemic drilling experiments spread by using garnet ferrite material.It mainly aims to explore machining parameters' influence on evaluation parameters using cutting tools of different diameters,and how to control machining quality of inclined hole.Taking the fracture characteristics and ultrasonic assisted drilling mechanism into account,the results were analyzed.The results showed that under the condition of cutting tool of different diameters,the effect of process parameters on the processing quality showed slightly different,inclined hole on the upside edge collapse was small than lower edge.Based on the findings,the surface quality and precision control measures were put forward,and the process scheme of the hard brittle materials was improved.This study provides a new way to machine small diameter deep hole effectively of brittle materials.The machining equipment based on machine tool accessories contributes to a more extensive use.The experimental results provide a guidance to improve surface quality and machining precision.