仿生犁铧耐磨性试验研究

Experimental Study on Wear Resistance of Bionic Plowshare

为解决犁铧磨损消耗快,使用周期短等问题,基于贝壳仿生表面条纹结构对犁铧上下表面进行结构优化设计,设计两种不同仿生犁铧。通过Design-Expert 13建立基于响应曲面的仿生条纹表面显微硬度回归模型,得到最优工艺参数为激光功率1800W,送粉速率25g/min,扫描速度5mm/s,加工试样进行田间试验。结果表明两种仿生犁铧结构可有效提高犁铧整体耐磨性能,其中D试样各位置磨损均匀,条纹间隙出现条纹状沟,提高了土壤流动性并减少堆积。与传统犁铧相比,F和D试样耐磨性分别提高了14.6%和16.5%,在犁铧上下表面加工仿生条纹可有效提高犁铧耐磨性能。

To solve the problems of fast wear and consumption and short service life of plowshare,two different bionic plowshare were designed based on structure of shell as bionic surface stripe on the upper and lower surfaces of the plowshare with structure optimization.The bionic stripe surface micro-hardness regression model was established based on response surface by Design-Expert 13,and the optimal technological parameters were obtained with laser power of 1800W,powder feeding rate of 25 g/min,scanning speed of 5 mm/s,the experiment samples were processed and tested in the field.Results showed that two bionic plowshare surface with stripe structures could effectively improve the overall wear resistance of the plowshare,in which the sample D had uniform wear for all values and stripe-like grooves appearing in the stripe gaps,which improved soil flow and reduced soil accumulation.Compared with the conventional plowshare,the wear resistance of sample F and D increased by 14.6%and 16.5%respectively.Bionic stripes on the upper and lower surfaces of the plowshare could effectively improve the wear-resistant performance of the plowshare.