摘要
针对传统草坪修剪机刀具切割阻力大、磨损快的问题,以滑切角、刃倾角和刀具转速为设计变量,采用Design-Expert和EDEM仿真对草坪修剪机刀具进行参数优化。首先,提出了一种基于对数螺线原理的等滑切角刀具设计方法,确定滑切角、刃倾角和刀具的转速范围。其次,利用EDEM软件构建了生草模型和刀具模型,并进行仿真切割,得到了刀具的受力数据。最后,通过Design-Expert软件进行了三水平三因素正交试验设计,以刀具所受法向力和切向力为评价标准,对试验结果进行方差分析、显著性检验和响应曲面分析,建立了二次回归模型,并进行多目标参数优化。结果表明:当滑切角为42.8°,刃倾角为35.4°,刀具转速为1416 r/min时,刀具所受的法向力和切向力最小。研究结果为刀具的设计和优化提供了理论依据。
In this paper,aiming at the problems of large cutting resistance and fast wear of traditional lawn trimmer cutters,the parameters of lawn trimmer cutters were optimized by using Design-Expert and EDEM simulation with the sliding cutting angle,edge angle,and tool speed as design variables.Firstly,a design method of cutter with equal slip cutting angle based on logarithmic spiral principle was proposed to determine the slip cutting angle,edge angle,and speed range of the cutter.Secondly,the grass model and tool model were constructed with EDEM software to simulate cutting and get the stress data of the tool.Finally,a threelevel and three-factor orthogonal experiment was designed using the Design-Expert software.The normal and tangential forces subjected to the tool were taken as the evaluation criteria.Analysis was carried out on the test results,including variance analysis,significance testing,and response surface analysis.Subsequently,a quadratic regression model was established,followed by multi-objective parameter optimization.The results showed that when the slip cutting angle was 42.8°,the edge angle was 35.4°,and the tool speed was 1416 r/min,the normal and tangential forces acting on the tool were minimized.This finding could provide a theoretical foundation for the design and optimization of the tool.
作者
刘舰泽
马晓春
赵佳硕
LIU Jianze;MA Xiaochun;ZHAO Jiashuo(Northeast Forestry University,Haerbin 150040,Heilongjiang,P.R.China)
出处
《林产工业》
北大核心
2026年第2期23-30,共8页
China Forest Products Industry
基金
中央高校基本科研业务费专项资金项目(2572017DB01)。
