Abstract: Based on the designed cane straw cutting blade, a cutting power consumption model is created. The minimum cutting power consumption is taken as the objective function and optimized. The optimal sliding angle is 40°. Orthogonal experiments were carried out on the three main influencing factors of cutting power consumption. The results showed as follows: Firstly, when the water content of straw increased, the cutting power consumption increased with the increase of water content. Secondly, when the amount of single cutting increased, the cutting power consumption also increased. Thirdly, in the same cutting condition, the serrated blade of 40° sliding angle had the lowest cutting power consumption and the highest cutting efficiency. The results of the two statistical methods showed that the blade type had the most significant effect on the cutting power consumption, then the water content of straw, and finally the single cutting amount. The optimum combination was that the water content of straw was about 20% and the single cutting amount was 6 kg, the blade type was serrated blade of 40° sliding angle.

Key words: equal slidingcutting angle, sawtooth type, blade, optimal design

摘要： 基于已设计出的藤茎类秸秆切割刀片，创建切割功耗模型，将切割功耗最小作为目标函数并进行优化计算，获得最优滑切角为40°。对切割功耗的三个主要影响因素进行正交试验，结果表明:当秸秆含水率增加时，切割功耗随含水率的增加而增大；当单次切割量增加时，切割功耗也随之增大；相同的切割情况下，滑切角为40°的锯齿型刀片的切割功耗最低、切割效率最高。两种统计学方法分析的结果都表明:刀片种类对切割功耗的影响最显著，然后是秸秆含水率，最后是单次切割量。最优组合为:秸秆含水率为20%左右，单次切割量为6kg，滑切角为40°的锯齿型刀片。

关键词: 等滑切角, 锯齿型, 刀片, 优化设计