Theoretical Research On Parametric Modeling Of Butterfly Valve And Development Of BVQCAD System

The triple eccentric metal hard sealing butterfly valve is one of the widely used mechanical equipments in various industries because of its small volume,light weight,small operating torque,fast opening and closing,and good sealing effect.At present,the product has been serialized,and its generalization and standardization are very high.As a product that is widely used and frequently replaced in the national economy,the design and production cycle of triple eccentric metal hard seal butterfly valves are becoming shorter and shorter.At present,the design of this kind of products is mostly based on the existing product design files to modify the design,design efficiency and design quality are difficult to meet the market demand.The development and establishment of a 3D CAD system based three-eccentric metal hard seal butterfly valve serialized product digital design system is satisfied.Market demand,an important way to improve product design efficiency and quality.At present,there is still a market gap in the digital design system of three eccentric metal hard seal butterfly valves;there are still blind spots in the research of product parametric modeling theory;the lag of automatic modeling,assembly and mapping methods,and the automatic finite element static analysis of main components The implementation method is relatively lacking.Theoretical research and system development lag behind market demand.In this paper,the three eccentric metal hard seal butterfly valve is taken as the research object.Based on the well-established valve design theory,the parametric modeling theory of the components of the serialized product;the virtual automatic assembly of the product;the automatic limitation of the main parts of the product The metastatic analysis method was developed to finally develop a 3D CAD system integrating integrated three-eccentric metal hard seal butterfly valve series products,filling the research gap of modeling theory of this kind of products,solving the urgent needs of the market and effectively improving the products.Design efficiency and quality.Through theoretical analysis and on-the-spot investigation,combined with the design practice of three eccentric metal hard seal butterfly valves,this topic has comprehensively improved the design theory of such products,and carried out theoretical innovation on the valve plate and valve shaft design;based on the perfect design theory Through feature analysis,topological relationship planning,parameter extraction and parameter calculation system,the parametric model of all parts of the product is completed,and the 3D part parametric modeling theory based on geometricmodel and mathematical model is formed.Based on SolidWorks system,use VB language programming,through the API function to call the SolidWorks system part modeling,virtual assembly,engineering drawing design and Simulation module function,develop and complete the automatic part modeling,automatic assembly,engineering drawing design and automatic finite element statics of main parts Analyze the function of the three-eccentric metal hard seal butterfly valve series product 3D CAD system,breaking through the product design,analysis function integration difficulties and system integration technical bottleneck;through function transfer,function call and program control,formed a part model And parameter automatic transfer mode,adjust The method of automatic finite element static analysis of parts is completed by Simulation function,which solves the problem of automatic finite element analysis based on SolidWorks system.The completion of this subject further perfected the design theory of three eccentric metal hard seal butterfly valves,formed a theory based on geometric model and mathematical model for parametric modeling,and developed a 3D CAD system with integrated integrated triple eccentric metal hard seal butterfly valve.Completed the system integration.The research results have filled some blanks in the parametric modeling theory of mechanical products,breaking through the difficulties in the development of 3D CAD parametric design system for mechanical products,forming a more complete theory and method system,and also the 3D parameters of related products.The development of the design system provides a theoretical and methodological reference.At the same time,the development of the integrated integrated system has completed the blank of the integrated design system of this kind of products,which satisfies the actual demand,greatly improves the modification design efficiency and quality of the triple eccentric metal hard seal butterfly valve,and improves the The design environment effectively promotes the development of the valve industry.