为了实现低成本三维打印制备金属、陶瓷零件,研究了喷射UV光固化粘结剂的3DP法,介绍了该3DP法三维打印制备金属、陶瓷零件的完整工艺流程,研究了所采用的UV光固化粘结剂的有关特性。结果表明,紫外光照强度在750~1500 m W/cm2内对粘结剂...为了实现低成本三维打印制备金属、陶瓷零件,研究了喷射UV光固化粘结剂的3DP法,介绍了该3DP法三维打印制备金属、陶瓷零件的完整工艺流程,研究了所采用的UV光固化粘结剂的有关特性。结果表明,紫外光照强度在750~1500 m W/cm2内对粘结剂的固化情况影响不大,峰值固化时间都在4~5 s,总固化时间在21~22 s。粘结剂加热到约230℃时完全固化,约340℃时开始分解,约460℃时分解完全。固化后的粘结剂及其烧损后的残留物中主要含C、H和O三种元素。所得到的研究结果可为整个工艺过程有关参数的选择和最终制件成分的控制提供依据。展开更多
Experiment of rapid prototyping (RP) is a multi-level and multi-factor problem with long process cycle. As powder-based RP method, three dimensional printing (3DP), and selective laser sintering (SLS) are the most pro...Experiment of rapid prototyping (RP) is a multi-level and multi-factor problem with long process cycle. As powder-based RP method, three dimensional printing (3DP), and selective laser sintering (SLS) are the most prominent RP methods for their flexibility in material selecting. The research of 3DP process shows that much experiments work can be greatly decreased by the method of uniform design with restricted mixtures for RP products’ performance to its forming material. Then, according to backward regression methods, the binomial and inverse terms nonlinear regression equations were set up by statistic analysis and computation. Together with evaluation function method, multi-object optimization model for performance of products to the powder mixtures was developed, and the optimization problem was solved by software MATLAB. After that, the optimum results were solved and tested by experiment with the same condition as before. Differences between the calculation results and testing results, which including product’s density, compression strength, surface evaluation, and deformation in three dimensions, are less than 10%, and have the same error direction. Uniform design method for regression and optimization was proved to be an excellent method to obtain optimum results for multi-level and multi-factor experiments of RP and other process which have a long processing cycle.展开更多
文摘为了实现低成本三维打印制备金属、陶瓷零件,研究了喷射UV光固化粘结剂的3DP法,介绍了该3DP法三维打印制备金属、陶瓷零件的完整工艺流程,研究了所采用的UV光固化粘结剂的有关特性。结果表明,紫外光照强度在750~1500 m W/cm2内对粘结剂的固化情况影响不大,峰值固化时间都在4~5 s,总固化时间在21~22 s。粘结剂加热到约230℃时完全固化,约340℃时开始分解,约460℃时分解完全。固化后的粘结剂及其烧损后的残留物中主要含C、H和O三种元素。所得到的研究结果可为整个工艺过程有关参数的选择和最终制件成分的控制提供依据。
基金Supported by the Ph. D’s Start-up Fund in University of Shanghai for Science and Technology, China (No. 10D305)
文摘Experiment of rapid prototyping (RP) is a multi-level and multi-factor problem with long process cycle. As powder-based RP method, three dimensional printing (3DP), and selective laser sintering (SLS) are the most prominent RP methods for their flexibility in material selecting. The research of 3DP process shows that much experiments work can be greatly decreased by the method of uniform design with restricted mixtures for RP products’ performance to its forming material. Then, according to backward regression methods, the binomial and inverse terms nonlinear regression equations were set up by statistic analysis and computation. Together with evaluation function method, multi-object optimization model for performance of products to the powder mixtures was developed, and the optimization problem was solved by software MATLAB. After that, the optimum results were solved and tested by experiment with the same condition as before. Differences between the calculation results and testing results, which including product’s density, compression strength, surface evaluation, and deformation in three dimensions, are less than 10%, and have the same error direction. Uniform design method for regression and optimization was proved to be an excellent method to obtain optimum results for multi-level and multi-factor experiments of RP and other process which have a long processing cycle.
