小型桑树伐条机切割部分试验研究

Experimental Investigation of the Cutting Part for Mini-type Mulberry Branch Cutting Machine

小型桑树伐条机切割部分的设计必须满足切割功耗小及桑条损伤程度低两个指标。为此,通过对桑树伐条机切割部分进行桑条切割试验,分析试验结果得出了影响这两个指标因素的主次顺序,即刀刃形状>刀刃角度>刀盘转速。根据试验结果,采用多项式回归分析方法对数据进行处理,建立了这两个评价指标的数学模型。利用该模型对切割参数进行优化,得最佳的切割参数组合为刀刃形状选弧形、刀刃角度选20°、刀盘转速选369 r/min,从而为小型桑树伐条机切割部分的设计提供依据。

The cutting part of mini-type mulberry branch cutting machine must have the characteristics of lower cutting power consumption and mulberry branch cutting loss. Trough generally and orthogonally experimental studies, the experimental investigation of the mulberry cutting parameters which influence the two evaluation indexes were carried out to meet requirements. Hence, the primary and secondary sequences of the mulberry cutting parameters were obtained, i. e. the cutting edge shape, the cutting edge angle, the rotating speed of knife disc. The mathematical models for the two evaluation indexes were constructed by using muhinomial regression analysis method to deal with the experimental data. The mathematical models were employed to optimize the mulberry branch cutting parameters. The optimal mulberry branch cutting parameters with minimum cutting power consumption and mulberry branch cutting loss were worked out, namely, the cutting edge shape is arch, the cutting edge angle is 20°, the rotating speed of knife disc is 369r/min. The results provide some foundations for design of the cutting part of mini-type mulben＇y branch cutting machine.