Design And Experimental Study Of Rotating Ultrasonic Edger

Aiming at the problems of large tool loss,serious chipping,low processing efficiency and low energy utilization rate in the ceramic edging process,the rotary ultrasonic processing technology is applied to the edging of ceramic tiles.In this paper,a set of rotating ultrasonic edging experimental equipment is designed,including ultrasonic vibrator,rotating ultrasonic spindle,four-axis motion platform and electrical control system,which can realize simulation processing of various working conditions.The main research contents of this paper are as follows:First,the design and simulation of the ultrasonic oscillator.Using the longitudinal vibration equation of the variable section thin rod,the frequency equations of the transducer and the stepped horn are derived and the length is calculated using the equation.The ANSYS18.0 simulation software modal analysis tool was used to optimize the shape of the transducer and horn and to design an electroplated and brazed tool head for rotating ultrasonic edging.Assemble the ultrasonic vibrator and measure the vibrator parameters using an impedance analyzer.The effect of the number of diamond meshes on the resonant frequency of the electroplated and brazed discs was compared,and the difference between the calculated and simulated vibrator resonant frequency and the measured resonant frequency of the vibrator was compared.Second,the design and assembly of the rotating ultrasonic edging spindle.In order to ensure the concentricity between the vibrator and the main shaft,a positioning scheme for taper and screw adjustment is proposed.In order to reduce the temperature rise generated by the ultrasonic transducer,a novel air-cooled structure is designed.In addition,the non-contact inductive power supply method is used instead of the brush power supply,and finally a rotating ultrasonic spindle that meets the design requirements is produced.Third,the design of the rotating ultrasonic edging experimental platform.In order to meet the experimental requirements of different process parameters,a four-axis motion platform for process experiments was built.Through the linear motion in the X,Y,and Z directions and the rotational motion around the Z axis,the grinding depth,machining speed,grinding height,and feed angle can be changed separately.The platform provides a hardware platform for studying the effects of different process parameters on the process.Moreover,the design and commissioning of electrical control systems.This paper designs a special control system based on PLC(Programmable Logic Controller),builds an electrical control circuit,and writes a PLC control program and human-computer interaction interface.The system can control the speed and displacement of the four stepper motors and spindle motors of the experimental platform,providing software support for the experimental device.Finally,the experiment of rotating the edge of the tile by ultrasonic edging.The grinding force change in the grinding process was analyzed,and the grinding force was collected using a Kistler dynamometer.The grinding force under different process parameters was studied,and the variation of grinding force under the two conditions of ordinary edging and ultrasonic edging was compared,and the optimized proce ssing parameters were obtained.