Design Of Tapered Transition Step And Experimental Study On Ultrasonic Grinding

Ultrasonic vibration grinding particle uses the characteristics of ultrasonic vibration with high frequency and high energy density by ultrasonic horn to expand increase of amplitude and to gather energy to impact compacted particles,so as to achieve particle to. This paper mainly using ultrasonic vibration grinding particles, designed to match the tapered transition of stepped-ultrasonic horn, verifies the feasibility of ultrasonic vibration grinding. The research value and significance of the particle crushing is studied.This article, through the design of ultrasonic grinding system, including core element tapered transition of the front design and simulation analysis, for studying the silica sand and other particles crushing experiments, proves the feasibility and rationality of crushed. The ultrasonic generator generates ultrasonic, via a super transducer will high frequency electrical power into mechanical power, then by conical transition step deformation amplitude rod amplifier amplitude increased velocity ratio, the particles of the material slot for crushing effect. Ultrasonic crushing device comprises a fine adjustment mechanism of grinding part, regional height fine-tuning, to ensure a certain size range of particle crushing. Device in the retaining ring device is convenient aftercrushing particles collection. The ultrasonic crushing method for dry grinding, is mainly suitable for crushing hard brittle or easy to be ground materials.This paper deals with ultrasonic vibration grinding particles, has mainly completed the following parts of the work:(1) An overview of the powder in the importance of life, is widely applied in various fields and has wide development prospects. Describing the ultrasonic machining technology in domestic and foreign, the development status and application scope, the new progress in some areas which just has made. The use of ultrasonic vibration grinding particles has a certain value and far-reaching significance.(2) This paper explores the properties of powder materials, including geometric properties and physical mechanical properties etc. It elaborates the particle distribution rule and to measure the principle of particle determination by laser particle size distribution instrument, then to clarifies its principle. It also studies the related to the crushing mechanism of powder particles, including grinding methods and models, mechanical properties of grinding, crushing power consumption theory and single particle crushing mechanism.(3) The paper Analyses the ultrasonic grinding system design, including the analysis and design of the tapered transition horn. First we design the ultrasonic grinding device and analyze some important parts, then expatiate its working principle and movement principle of this device mechanism. At last, elaborate the process and mechanism of the grinding device.(4) Analytic method is used to calculate tapered transitional stepped ultrasonic node location, the amplitude magnification coefficient and related parameters of the theoretical value. By using ANSYS software simulation analysis was carried out on the tapered transitional stepped ultrasonic horns. By building model, meshing, harmonic response analysis and modal analysis on related parameters to evaluate the amplitude, get the parameters of the ANSYS simulation values. The amplitude is relatively close to the simulated values and the theoretical value and the measured values, using the method of ANSYS to verify the rationality of the amplitude, also to provide a new way.(5) Establish the mathematical model of the particle and use the ultrasonic grinding system for grinding experiment research. It is proved that the deformation of conical transition step horn ultrasonic grinding device particle is feasible of, through observations of several specific different time nodes granularity of D95 value decreases. Respectively, by the methods of control variables, changing experimental conditions, such as the ultrasonic transducer power, the crushing materials with different properties and the amplitude type parameters, to explore the relationship between the grinding effect and the experimental parameters.