| China is the largest producer of edible fungus, mushroom industry has become an important industry on Chinese agriculture. Mushroom is not only nutritious and delicious, but also has high medicinal value. There are many different kinds of edible fungus resources in Yunnan province, and it is widely dispersed. Because most of its wild edible fungi after harvest is highly perishable.It need to be frozen storage immediately before the time of harvest and solding or other treatment. At present, the frozen edible fungus is still based on the manual section in most enterprises. The shortcomings of method, for example, working environment is poor, work high-intensity work, and the slices of low efficiency and poor, restrict the rapid development of Yunnan’s wild mushroom industry seriously.In order to change this situation for suiting the urgent needs of the market. Based on frozen mushroom as the research object, first of all, the basic physical parameters (diameter, thickness and quality) were measured and statistical analysis, and the parameters are used to establish three-dimensional physical model of frozen mushroom. We choose shear velocity (60 mm/min-120 mm/min), loading direction (the handle down, reducing the handle up), temperature (-15℃～-40℃) as factors, and then we carried on the single factor shear experiments on frozen mushroom. Taking maximum shear stress, shear strength and the shear modulus as the test index. The results are used to analyze the influence of various factors on the test index, and established the regression equation. The frozen mushroom and segmentation based on the design of the machine on discharge, and draw the corresponding 2 d and 3 d drawings, Finally through the simulation software ADAMS/View to emulate the cut extension model of the frozen mushroom.The results show that the three-dimensional physical model of the frozen mushroom is an approximation for a ball, the ball diameter is D= 40.66mm, Frozen mushroom in the handle down and reducing the handle of the maximum shear forceward are:157.6 N,183.3 N, the shear strength are:0.44 MPa,0.51 MPa, the shear modulus are:0.94 MPa,1.15 MPa. In different shear rate (60 mm/min～120 mm/min) under the scope of shear stress are:147.3 N～177 N, the shear strength are:0.41 MPa ～0.49 MPa, the shear modulus are:0.78 MPa～1.08 MPa. At different temperature (-15℃～-40℃) under the scope of shear stress are:134.8 N～183.9 N, the shear strength are:0.37 MPa～0.51 MPa, the shear modulus are:0.63 MPa～1.03 MPa. So that the frozen mushrooms is anisotropic, By significance test, the temperature effect on shear mechanical properties of frozen mushroom was highly significant, the loading direction, shear rate was not significant. The shear modulus with the increase of temperature of frozen mushroom, the increase of shear rate and lower, In the practical production, the speed of shear should be depending on the production efficiency, in order to keep the freshness of mushroom, its temperature while slicing should not be higher than　-15℃. Freezing machine by discharging letinous edodes segmentation, segmentation, sample system, discharge system, shear force of frozen sections when letinous edodes does not exceed 200N, the theory of production capacity of 300kg/h, Through the stress analysis and the ADAMS/View simulation of the slicing process, verify the feasibility and stability of cutting machine model, and the spindle modal analysis, the first-order natural frequency is 1942.4Hz, the excitation frequency is much higher than that of 3.3Hz, slicing machine that resonance will not occur in the process of operation, performance dynamic good. The design results provide a certain theoretical basis for the development of letinous edodes’s cold cutting machine. |
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