Research On Automatic Polishing Device For Large Flat Castings Based On Parallel Floating Structure

The foundry industry is an important component of the traditional manufacturing industry,laying an industrial foundation for the design and manufacture of heterogeneous and extra-large equipment.Casting grinding is an important process in the production process of large-scale castings.At present,it is mainly done manually,and has the characteristics of high work intensity and harsh environment.With the improvement of the domestic industrial base,the weakening of the demographic dividend and the increase in manufacturing costs,there is an urgent need to improve the current status of relying on manual polishing.In this paper,a large flat casting with a large output,a single process and a long time is taken as the research object An automatic grinding device that can adapt to large flat castings is designed.Adaptability of surface characteristics of similar castings.The main research contents of this article are as follows:First,the structural design of the automatic grinding device.According to the downstream process parameter requirements of large flat castings,the device performance index is designed,and the overall structure scheme of the automatic grinding device is constructed;the appropriate grinding wheel is selected according to the comparison of the grinding process parameters and the characteristics of the casting material;Motors;design suitable grinding wheel chucks according to the design principles of grinding wheel chucks;design the specific structure of a three-degree-of-freedom parallel platform according to the requirements of adaptability;using finite element analysis,static analysis and optimization of floating and fixed plates in parallel platforms.Secondly,carry out kinematics research of the automatic grinding device.Model ion,mathematical model and kinematics equations for the parallel platform,and inverse kinematics solution to obtain the spring design parameter expression.At the same time,combined with the parameters of the parallel platform,the spring compression range is calculated by MATLAB,and the work space simulation of the edge point and center point of the floating plate is completed,and the three-dimensional point cloud diagram and cross-sectional view of the edge point and center point of the floating plate are obtained.Thirdly,carry out the motion simulation research of the automatic grinding device.According to the surface characteristics of the polished castings,the castings are divided into 5 typical surface characteristics.The typical experimental environment is built.The ADAMS kinematics simulation software is used to analyze the adaptability of the polishing device.Finally,build an automatic polishing device and experimental platform.According to the design plan of the automatic polishing device,the processing of the automatic polishing device,the design and processing of the lifting platform,the selection and purchase of the sensor,the selection and purchase of the controller,the constant force control research,etc.,complete the construction of the automatic device and the experimental platform,Provide a platform for the next data collection and analysis.