Topology Weight Reduction Optimization And LED-LC Surface Forming Process Research

At present,most of the optimization design methods are based on traditional manufacturing processes,which seriously restricts the ability of product structure design and fails to use the new design space provided by additive manufacturing technology,so that the structural performance of parts cannot be fully released.In order to give full play to the processing advantages of additive manufacturing,and explore the technology combined with topology optimization design,the topology design of traditional structural parts is optimized for weight reduction.Using the LED(Light Emitting Diode)-LC(Liquid Crystal)surface molding light curing technology in additive manufacturing technology as the manufacturing basis,first of all,the topology optimization method and light curing reaction principle,as well as the accuracy problems in the light curing molding process are analyzed,It provides a theoretical basis for the topology optimization,material preparation and process optimization of the structural parts described later.The following swing arm and hinge arm are the specific research objects.Combined with the finite element analysis technology,the static and dynamic performance of the initial structure is analyzed,the design space and the non-design space are set,and the topology optimization is performed by the variable density method with a penalty model.The optimization results are re-modeled,and the final design structure is re-analyzed for static and dynamic performance,and compared with the original structure.Prepared the photosensitive resin for printing and molding the optimized structure,analyzed the common oligomers,reactive diluents,photoinitiators,and analyzed the viscosity and volume shrinkage of the oligomers with different ratios to the photosensitive resin through experiments The relationship between the rate,mechanical properties and curing speed,the influence of different ratios of photoinitiators on the curing speed,and finally the photosensitive resin formula is obtained.In the process of photocuring molding using photosensitive resin,a single factor analysis method was used to discuss the influence of layer thickness,round waiting time,and exposure time on the Z dimension accuracy of the molded parts.Through the multi-factor orthogonal experiment,the influence of coupling of various process parameters on the molded parts is studied,and the Z-dimensional dimensional accuracy is used as the evaluation index to find the best process parameters.Finally,the optimized structure model was successfully printed by using the process parameters and photosensitive resin to verify the feasibility of topology optimization combined with LED surface molding and UV curing manufacturing technology for complex structure design and molding.In the later stage,the photosensitive resin molding part and casting process can be combined to solve the problem of complex structure and difficult processing and manufacturing after optimization.