基于划口预处理的不同品种核桃破壳分析研究

Analysis of Different Kinds of Walnut Breaking Shells Based on Cutout Pretreatment

为了提高核桃的破壳率同时减小核桃仁损伤,以新丰核桃和新早丰为研究对象,进行了有限元分析,以简化试验过程,再通过静态压力试验和划口预处理对破壳影响的正交试验进行分析。静态压力试验结果表明:划口预处理后核桃更易破壳;划口位置与加载力位置重合时比划口所在方向与加载力方向垂直时核桃更易破壳;划口位置与加载力位置在肚部重合时核桃最易破壳。正交试验结果表明:新丰与新早丰核桃一次破壳率和高露仁率因素的主次顺序均是划口深度>划口长度>划口宽度;当划口深度1.5 mm、划口宽度2.55 mm、划口长度19 mm时,可以得到较好的破壳效果。

In order to increase the shell breaking rate of walnuts to reduce walnut damage,Xinfeng walnuts and Xin Zaofeng were studied. First of all,finite element analysis was performed to simplify the testing process. The results of the analysis showed that the porting pretreatment was more conducive to walnut shelling. Then through the static pressure test and demarcation pretreatment to further study the impact of the broken shell of the orthogonal test,the static pressure test results show that: after the hatching pretreatment walnut is more easy to break the shell;When the direction is perpendicular to the direction of the loading force,the walnut is more likely to be broken;when the position of the cutting position and the position of the loading force overlap in the belly,the walnut is most likely to be broken. Orthogonal test results show that the primary and secondary orders of the primary shell-breaking rate and the high-nullness rate of Xinfeng and Xinzao walnut are demarcated depth>staggered length >bracket width. When the cut depth is 1. 5 mm,the cut width is2.55 mm,and the cut length is 19 mm,a better shelling effect can be obtained.