Study On The Bionic Design Of The Working Surface Of The Colloid Mill Head Based On The Geometry Of The Bovine Molar

With the development of the current crushing processing industry,the quality and fineness of material crushing processing are getting higher and higher.The colloid mill equipment is a very important equipment in the process of crushing and processing industry.It has a wide range of applications and development space in various industries.However,there are still some problems in the current colloid mill.It is easy to generate large heat between the stator and the material.When the working temperature rises,the material is easy to change.Meanwhile the working surface of the grinding head is easy to wear,and the effect of grain refinement will decrease significantly after wearing.The bovine molar has a unique geometric structure and good wear resistance.In this paper,in order to reduce the working temperature and resistance and improve the crushing efficiency of the material,a bionic design method was used to apply the geometric features of the bovine molar to the working surface of the colloid mill grinding head.The main work is as follows:1.Reverse reconstruction of bovine molar.The point cloud data of mature complete molars are acquired by high-precision three-dimensional scanner.Then the point cloud data are processed by the reverse engineering software Geomagic studio to reconstruct the model of bovine molars.At the same time,the modeling error is analyzed,which will lay the foundation for bionic design.2.A method for determining,extracting and characterizing the biomimetic geometric features of animal molars is proposed.This paper introduces the tooth system and its distribution of bovine teeth,and describes the geometry and distribution of bovine teeth from a macroscopic perspective.Combined with its physiological meaning and function,the changing regularities and trends of the geometrical characteristics of each molars in the entire dentition were analyzed.Identifying the geometrical structure of the most obvious geometric changes in the dentition,infundibulum dentis and cusps are initially determined as the biomimetic design bionic characteristics.Then,by using the finite element analysis method,the influence of geometric characteristics of bovine molar teeth on its chewing process is analyzed from the two aspects of holistic geometric characteristics and local geometric characteristics of bovine molars.Infundibulum dentis are further confirmed as the biomimetic design bionic characteristics.On this basis,3D software SolidWorks is used to extract the size parameters of the infundibulum dentis of the molars by projection or sectional view.Meanwhile,the characteristic contours of the molar are approximated by circular arcs and straight lines,which are dimensioned to represent the bionic characteristics parameter.3.Based on the geometric features of bovine molar,a new type of bionic design method is proposed for grinding head of colloid mill.To establish bionic model of colloid mill grinding head,the working surface of the grinding head is optimized by the geometrical shape of the infundibulum dentis in bovine molar,such as using dental star arc to optimize the working head surface,using flare angle and dip angle of infundibulum dentis to optimize the groove shape(ie normal pressure angle ?),using tip of infundibulum dentis to optimize helix angle ?,using hypocone of infundibulum dentis to optimize tooth bottom.According to the design principle and the actual processing conditions,the reasonable extraction of the level of the characteristic parameters is taken to design corresponding orthogonal test.The finite element analysis is used to verify the optimization results,so that the optimal colloid mill bionic optimized grinding head is designed.The simulation results show that the grinding head can effectively reduce the working temperature and resistance of the colloid mill.4.Experimental verification of bionic grinding head.A colloidal mill experiment platform is established.Taking its working temperature,action resistance and grinding fineness as evaluation indexes,the grinding experiments of bionic grinding head and ordinary sawtooth grinding head are carried out respectively.The results show that the bionic grinding head can effectively reduce the working temperature and action resistance and improve the fineness of the grinding.The research results show that the bionic grinding head based on the geometrical characteristics of bovine molar can effectively reduce the working temperature and the resistance of the colloid mill,and improve the crushing efficiency of the material.