铝材轧制加工过程中的摩擦特点及其影响

摩擦在铝材轧制生产过程中起着至关重要的作用，它影响着产品质量、轧辊的磨损和轧制过程的力能消耗。本文在分析铝材轧制过程摩擦特点、摩擦磨损机理的基础上，着重分析了摩擦对轧制过程、轧制压力、变形区、最小可轧厚度和产品质量的影响。采取合适的工艺润滑，是减少摩擦与磨损，降低轧制压力，提高生产效率和产品质量的有效途径。     

Dynamic wetting of rolling oil on aluminum surfaces

Static and dynamic contact angles of stock oil and its solutions with additives（fatty acid, fatty alcohol, fatty methyl ester usually used in rolling aluminum） were measured on aluminum surface （Alloy 1145） by sessile drop technique on an OCA35 dynamic contact angle tester. The effect of additive on the drop spreading was investigated as well. It is shown that the drop spreads very quickly in the first 500 ms after the lubricant contacts with the aluminum surface, and then does slowly later. The dynamic contact angle decreases exponentially with time. In contrast to the stock oil, although addition of polarity additive of long chain alkyl into stock oil is able to decrease the surface tension of solutions, it weakens the wetting dynamic, which results fi＇om the adsorption at the expanding solid/liquid interface. Among the same long chain polarity organic compounds used, dynamic wetting decreases in the order of fatty acid, fatty alcohol and fatty ester. The blend of fatty alcohol and fatty methyl ester can improve the oil wetting dynamics and promote the lubricant spreading.     

橡胶制品的组合静态性能分析及计算

橡胶材料由于其自身的超弹性,橡胶制品的载荷变形曲线呈现非线性,所以要想获得两个或两个以上的橡胶制品组合件的静态性能就显得尤其困难。文中通过有限元分析、试验分析和理论分析寻求计算成对使用的橡胶制品组合件静态性能的方法。在分析产品组合形式和力学模型的基础上,提出了预测橡胶制品的组合静态性能的新方法。最后以风力发电机组用齿轮箱弹性支撑为实例,试验验证了该方法的准确性及实用性。     

铝材轧制加工过程中的摩擦特点及其影响

摩擦在铝材轧制生产过程中影响产品质量、轧辊的磨损和轧制过程的力能消耗。在分析铝材轧制过程摩擦特点、摩擦磨损机理的基础上,着重分析了摩擦对轧制过程、轧制压力、变形区、最小可轧厚度和产品质量的影响。釆取合适的工艺润滑,是减少摩擦与磨损,降低轧制压力,提高生产效率和产品质量的有效途径。