Research On Key Techniques Of Automatic Grinding Wheel Abrasive Batching Production Line

At present, the difficulty of recruitment and employment is the most urgent problem that needs to solve in grinding wheel production enterprises. So that automatic grinding wheel abrasive batching production line has become the fully automatic device that numerous wheel companies run to use energetically, and becomes the research focus in the field as well. It collects technologies of various disciplines such as machinery, materials, control technology, sensor technology, computer technology, artificial intelligence and so on. Grinding wheel automatic batching production line can complete the batching work of all kinds of abrasive powders accurately, improve the wheel companies’production efficiency, and reduce production costs, for which reason it has a broad application prospect in the field of automatic production.Firstly, the source and the research significance of this topic are discussed. Then many current key technologies of fully automatic grinding wheel abrasive batching production line are listed and researched, such as stock bin unloading, feeding device, weighing precision, intelligent control. Besides, the primary research content is listed as well.Secondly, various factors that affect powder flow performance are analyzed. Evaluation indexes of powder liquidity are extracted, a simulation model is built up based on the discrete element method. Then simulation analysis is carried out on the factors that affect the friction and viscous powder liquidity using PFC software, and the analysis results show that these factors can cause the change of powder liquidity. For above reason, the design of auxiliary structure that can help with powder liquidity is explored.Thirdly, the principle of screw fending device and its design parameters is studied. And based on that, with a minimum weight of the helix as the optimization goal, structure optimization is conducted through identifying variables, establishing nonlinear constraint function, constructing a specific helix mathematical model, obtaining results by using MATLAB optimization tool. After that, finite element analysis is carried out on the helix structure by using ANSYS, so as to verify the feasibility of optimization, and results show that the optimized structure meets the lightest requirements with good structural stiffness and strength.Then, the composition and working principle of batching line weighing system is stated, and the error factors including impact bias and stranded material deviation that affect the weighing process is analyzed. According to the characteristics of the sources and changes of the error, a three-level weighing control method is proposed, which can increase not only weighing accuracy but also weighing speed.Finally, the system structure of automatic production lines is established, and a three-level distributed control system including management level, control level and equipment level is proposed. Then the hardware implementation of the control system is proposed, and the PC management software and the control program of single chip processor system is designed.The research results have been applied to production successfully, the system operates with robust stability, high control precision.