苗木切削试验台的研制

Development of Seedling Cutting Test Bed

为给苗木嫁接机切削系统提供设计依据,研制了苗木切削试验台,并以桃树苗作为试验对象,苗的切削阻力和切断率作为目标进行切削试验.结果表明,苗木直径、转速、滑切角依次影响切削阻力大小,苗木直径与切削阻力呈平方关系;转速与切削阻力呈线性关系;滑切角与切削阻力亦呈线性关系;从试验数据分析得出,苗木最大切削阻力为 7.34 N;转速较大地影响切断率,转速大于 60 r/min 时,即刀片切削线速度大于 0.312 m/s,能保证苗木切断率不低于 99.4%.

To study on seedling grafting robot and obtain its design datum,the seedling test bed has been developed.The cutting experiment has been conducted on peach seedling with the measurement of cutting resistance and rate of cutting out on test bed.The experiment results show that the diameter of seedling,speed of rotation and angle of slide cutting respectively influence the cutting resistance in sequence.Between diameter of seedling and cutting resistance there is a quadratic parabolic relationship,while between speed of rotation and cutting resistance there is a linear relationship just as that between angle of slide cutting and cutting resistance.In conclusion,the highest value of cutting resistance is 7.34 N and the cutting rate is not less than 99.4 percent under the condition that the speed is over 60 r/min,i.e.the cutting line speed is over 0.312 m/s.