Study On Design And Experiment Of Pneumatic Impact Cracking Machine For Walnut

Walnut is the best preponderant market competitive in characteristic fruit of fruit tree, and also is quick tempo of fruit tree in south of xinjiang fruit tree. along with the yield of walnut, and market require more and more advanced processing of walnut, in addition to break walnut to enhance additional value of walnut, as a result bring along the development of the industry of walnut. Above all, walnut shell-breaking is the preliminary stage of advanced processing for walnut.The paper sum up shell-breaking mechanism which researched, and by through with study pellicle of XinJiang walnut, make use of finite element method depend on the basis of walnut geometrical dimension and physical parameters, the finite element model was established useing force analysis of finite element by ANSYS. The mechanical characteristic of the walnut shell was analyzed and experiment under different conditions of force or pressure. The results showed that perpendicular the direction of sutural short axis of walnut to blow-breaking, Von Mises stress and strain nearly present to the top crooked surface of sutural short axis of walnut, it only result in the part of cracking make against to shell-breaking. But along the short or long sutural axis of walnut parallel the direction of blow-breaking, Von Mises stress and strain provided with exact direction and have a large area to make for walnut shell-breaking.Researched and development pneumatic impact for walnut cracking machine. The equipment have a feeding trough which circumgyrate continuously, which transit walnut to feeding box outside, and reclaim superfluous walnut to feeding box prevent accumulation. One transportation device is designed which have two parallel drive chain and transport box, which must ensure walnut is simplex and continuously transported to cracking location. At the same time, devise a oriented and convoy device which prevent walnut jumpiness and aberrancy efficaciously during in walnut transportation. Adopt quadratic orthogonal regression design, and find regression equation of walnut shell-breaking and optimal project in different experimental index.