Based on the preparation process of granular chemical products, solid materials such as powder, granular, colloidal materials have typical characteristics, such as a wide variety of materials, complex material states, feeding points, feeding frequent characteristics. In response to the requirements and characteristics of long-distance vacuum conveying of powder and rubber materials, research and selection of methods for material processing, dust-free feeding, vacuum conveying, continuous metering and feeding equipment are carried out to achieve long-distance vacuum conveying of special materials.
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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