Shrub harvester can provide good conditions for cutting shrubs. In order to improve the operational efficiency and quality of work of the shrub harvester, for this reason, the structural parameters of the circular saw blade of the shrub harvester are changed, the structure of the circular saw blade of the shrub harvester is optimized, and the optimal parameter of the circular saw blade is obtained, and the vibration reliability of the circular saw blade of the shrub harvester is calculated, and the reliability of the circular saw blade of the shrub harvester is obtained. The results show that when the parameters of the circular saw blade of the shrub harvester are 2mm thickness, 18° front angle, and 50° chisel angle, the minimum sawing force of cutting is 47N, and the reliability of the optimized circular saw blade is obtained to be 84.2% at the threshold value of 25.
In order to reduce the corrugations of pieces and improve the surface quality of pieces in single point progressive forming (SPIF), the forming process parameters were studied. Aiming at the complexity of single point progressive forming process, the prediction and analysis models of different process parameters, surface corrugateness and geometric deviation of inclined straight wall parts were established based on the response surface method by Box Behnken Design method. The reliability of the prediction model was analyzed by ANOVA (variance), and the influence law of process parameters and evaluation index was analyzed. The optimal process parameter combination is obtained and the accuracy of the model is verified. The results show that the layer feed of inclined straight wall parts is the most significant factor affecting the surface corrugations of parts, and then the influence degree from weak to strong is the diameter of tool head and forming Angle.
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