Preparation And Properties Of Steel Fiber Reinforced Resin Concrete Materials For Precision Machine Tools

With the rapid development of China's manufacturing technology,it has accelerated the precision machine tool to move towards high precision,high intelligence,green and so on.The bed body is the key basic part that determines the performance of the whole machine tool,which directly affects the machining accuracy of the machine tool and the surface quality of the parts,and using new materials to make the bed is one of the important factors to improve the overall performance of the machine tool.Cast iron is the main material for machine bed bodies,its damping characteristics have been brought into full play,and the manufacturing process has serious environmental pollution,which deviates from the development trend of green manufacturing and low-carbon environment.Resin concrete is made of granite particles as aggregate and binds with organic resin,it has certain advantages compared with cast iron material in terms of damping performance,thermal stability,corrosion resistance and environmental protection,but there is a problem that the mechanical properties are lower than cast iron.In this paper,steel fibers are used to further enhance the mechanical properties of resin concrete,and the excellent performance of steel fiber resin concrete is used to manufacture machine tool beds,which is of engineering and practical significance for improving the static and dynamic properties of machine tools,and even promoting the technological development of the machinery industry.The research work carried out in this article is as follows:According to the material properties and reaction mechanism of the steel fiber asphalt composition,combined with theoretical analysis and experimental research,the design and preparation process of the steel fiber asphalt composition were optimized,and a large number of test pieces are produced.and the basic proportion of component materials of steel fiber resin concrete is determined in combination with the macro mechanical properties of specimens.The research institute prepares the mechanical properties of steel fiber resin concrete,tests the compressive strength of the specimens,analyzes the mechanical performance mechanism of steel fiber reinforced resin concrete,establishes the stress transfer model of the steel fiber reinforced mechanism,and uses the contact angle and SEM to bond the interface from a microscopic point of view.To characterize the strength,and analyze the reinforcement mechanism of the steel fibers and the wettability and interfacial bonding between the steel fibers and the resin matrix.The damping performance of steel fiber resin concrete,plain resin concrete and cast iron materials are tested,the energy loss and damping mechanism of steel fiber resin concrete are systematically analyzed,and the influence of its internal components on the overall damping performance of the composite is studied.The thermal expansion performance of the steel fiber resin concrete is tested,the heat transfer mechanism of the composite material is analyzed,and measures to reduce the thermal expansion coefficient are proposed to provide a reference for improving the thermal performance of the composite material,and the density test of the steel fiber resin concrete specimen is completed.Taking the cast iron bed as the research prototype to design a new configuration of the steel fiber resin concrete bed.The finite element analysis software is used to analyze and calculate the static and dynamic characteristics and lightness of the two material beds.And comparing the results of the two analyses.The results show that under the premise of ensuring the lightness of the bed,the steel fiber resin concrete can significantly improve the feasibility and superiority of the comprehensive performance of the bed.The structural optimization design of the initially designed steel fiber resin concrete bed has further improved its static and dynamic performance while meeting the requirements of the light weight of the bed.Compared with the cast iron bed,its performance superiority is more prominent.Topological optimization is used to find the best material distribution of the optimized composite bed,which provides a reference for reducing the quality of the bed.In order to make full use of the high strength and stiffness of cast iron materials and the high damping properties of steel fiber resin concrete,a steel fiber resin concrete filled bed is proposed,and the static and dynamic performance analysis of composite structural material bed are carried out.The results show that the advantages of the bed in static performance,dynamic performance and light weight of the steel fiber resin concrete filled structure,and no need to re-cast molds,shorten the casting time,save cast iron materials and production costs,it can meet the processing requirements of ultra-precision machine tools,and provide a new way for the application of steel fiber resin concrete in the basic parts of machine tools.The above research content will provide a theoretical basis for the promotion of steel fiber resin concrete,which shows that steel fiber resin concrete has great application potential in the machine tool manufacturing industry,and lays a foundation for promoting the development of my country's machine tool equipment industry and advanced manufacturing industry.