湿坯含水率与干燥收缩率的关系研究

Study on Correlation of Water Content of Green Insulator Body with Its Shrinkage Rate

明确湿坯干燥过程中实测的含水率和收缩率之间的关系,通过控制湿坯成型含水率及几何尺寸,可以控制干坯的几何尺寸,保证产品符合设计要求。采用五种回归方式进行第一次回归计算,较为合适的回归式为y=A+Bx;为了如实反映坯体的收缩过程,建立三维模型,进行二次回归计算,得出最佳的回归式为y=A+Bx+Cx2,并与实验结果相印证。最后还讨论了回归误差和回归结果的运用。

The correlation of measured water content of green insulator body with its shrinkage rate was determined. The geometric dimensions of dried body was controlled to meet design requirements by controlling the water content and dimensions of wet body. Five regression equations were used for first regression, from which the most appropriate one was y=A＋Bx. Three-dimensional model was built for second regression calculation to reveal the shrinkage process of body, the best equation obtained was y=A＋Bx＋Cx^2, The calculation was compared with experimental results. The regression error and application of regression result was discussed.