The Optimization And Experimental Research Of Ultrasonic Torsional Vibration Boring System

At present, high temperature alloy, titanium alloy materials and other difficult processing materials are more and more widely applied in our country, but its processing is very poor. Especially precision small deep hole processing of these materials is considered to be one of difficult problems in machining field. There still exists some problems in the ultrasonic vibration boring system. Which is that the stability of the system is not ideal, and the resonance system do not achieve the effect. For the following reasons:(1)The amplitude structure has great influence on the natural frequency;(2)The welding method is difficult to meet the relative position relationship between the longitudinal vibration and torsional vibration amplitudes.(3) The original equipment manufacturing and installation accuracy is poorer, and cannot satisfy the use requirement. These problems affect the application of ultrasonic vibration boring, and make the effect of ultrasonic vibration boring not to play the ultimate. So stable ideal work of the ultrasonic vibration system is the key to achieve the best results.Firstly, this paper study the influence rules of the structures of its natural frequency through the finite element analysis software ANSYS. The theoretical design of the longitudinal vibration horn is modified to meet the requirement of the system by using the above rules. The concept of structure sound velocity was put forward for the first time, and the relationship between structural sound velocity and material sound velocity is illustrated. The relationship curves between the diameter and thickness of the flange and structural sound velocity are given by experiment. In the design of torsional vibration horn, these curves are important to determine the structure sound velocity. Aiming at the existing some disadvantages in the original system,we have made a comprehensive improvement and improvement. The performance of ultrasonic torsional vibration boring system is greatly improved. The improved system is more stable and the surface quality of parts is further improved than the original system. The boring experiments of titanium alloy are carried out by using this system, and achieve the effect of boring instead of grinding.