基于二阶响应曲面法的高速钢丝锥寿命预测研究

采用响应曲面法完成了W9Mo3Cr4V高速钢丝锥对30CrMnTi钢进行攻丝的丝锥寿命试验. 研究了丝锥攻丝(切削)速度,刃口钝圆半径,丝锥深冷处理(热处理)温度等三种不同类型因素对丝锥寿命的影响,建立了基于最小二乘估计的丝锥寿命预测模型,并对模型的显著性进行了检验,证明了模型的有效性. 试验数据分析结果及响应曲面图形显示:线性效应中,深冷处理温度对丝锥寿命影响最大,其次是刃口钝圆半径,影响最小的是攻丝(切削)速度;二次效应中,刃口钝圆半径影响最大,其次是深冷处理温度,影响最小的是攻丝(切削)速度;交叉效应中,刃口钝圆半径与攻丝速度的交互作用最明显,其次是深冷处理温度与攻丝速度的交互作用,刃口钝圆半径与深冷处理温度之间的交互性最弱. 

Prediction Model for HSS Tap Life Based on Reponse Surface Methodology

Response surface methodology (RSM) was applied to accomplish the experiment of W9Mo3Cr4V HHS tap tool life. The predict model among the tap life and three different factors such as tapping condition, structure and heat treatment process were established. The parameters chosen were cutting speed, the rounded cutting edge radius and temperature of cryogenic treatment. The predict model was expressed as a formula with the least squares estimation. The validity of the model was verified with ANOVA. The data and response surface showed that the sequence of linear effect are temperature of cryogenic treatment, the rounded cutting edge radius and tapping speed; the sequence of temperature of cryogenic treatment and the rounded cutting edge radius are changed in the square effect; the most obviously cross effect takes place between the rounded cutting edge radius and tapping speed, the next is the effect of the temperature of cryogenic treatment and tapping speed and the last is the effect between the rounded cutting edge radius and the temperature of cryogenic treatment.