基于稳健性设计的筛分加料工序质量评价和参数优化

Quality evaluation and parameter optimization of sieving and casing process based on robust design

为探明各影响因素对工序加工质量的影响,采用田口方法———稳健性设计对筛分加料工序进行了较为系统的质量评价与参数优化。结果表明:1)热风温度对加料后叶片平均含水率和温度的影响均为最大,筒体转速对加料后叶片平均含水率和温度的影响均为最小;2)物料流量对加料后叶片含水率和温度的波动影响均为最大,筒体转速对含水率的波动影响最小,蒸汽压力对温度的波动影响最小;3)为减小加料后叶片含水率和温度的波动,以质量损失最小化为原则,各因素水平最适组合为:热风温度75℃、蒸汽压力0·35MPa、物料流量4000kg/h、筒体转速13·5r/min;4)综合各因素对加料后叶片含水率和温度的影响大小,可将热风温度和物料流量视为重要因素,蒸汽压力视为调节因素,筒体转速视为次要因素。

Quality evaluation and parameter optimization of sieving and easing process were studied based on Taguchi method-robust design. Results showed that ： 1 ） the most important influencing factor on average lamina moisture content and average lamina temperature after casing is hot-air temperature and the less important influencing factor is revolving-speed of casing cylinder; 2） the most important influencing factor on fluctuation of lamina moisture content and lamina temperature after casing is lamina transfer rate, while the less important influencing factor on fluctuation of lamina moisture content is revolving-speed of casing cylinder and the less important influencing factor on fluctuation of lamina temperature is steam pressure ; 3） the suitable conditions with regard to hot-air temperature, steam pressure, lamina transfer rate, and revolving speed of casing cylinder are 75℃, 0. 35MPa, 4000kg/h, and 13.5r/min; 4） according to their overall effect on lamina moisture content and lamina temperature after casing, hot-air temperature and lamina transfer rate are main factors, steam pressure is a adjustment factor, and the revolving-speed of casing cylinder is a less important factor.