【作者】 巩克云；

【导师】 卢秀春；

【作者基本信息】 燕山大学 ， 机械设计与理论， 2002， 硕士

【摘要】 细长轴特别是特细长轴的表面精加工，一直是机加工的难题。不锈钢细长轴不仅具有细长轴的一些特点，自身由于含碳量低，韧性大，切削性能差等特点，使得不锈钢细长轴的表面精加工更加困难。滚压加工是一种高效的无屑光整加工方法，并且能改善工件的表面硬度，提高细长轴的疲劳强度，降低轴的表面粗糙度。 本文采用滚压加工的方法对不锈钢细长轴表面进行加工，克服了不锈钢特细长轴在加工过程中表现出的柔性大、塑性大的缺点，并且加工的细长轴的长径比不再受到细长轴缺点的限制，使得高速有效的加工细长轴成为可能。在滚压加工工艺中，滚压套的压下量大小决定了滚压力的大小并决定了细长轴表面发生弹塑性变形的状况，从而决定了细长轴的加工质量。用ansys有限元分析软件可以方便的设置压下量和滚压力，并能直观的显示细长轴的应力状态，为揭示细长轴在加工过程中应力状态的变化提供了有效的途径。本文利用有限元的方法对压下量的选取作了详细的研究，并结合滚压加工的理论对细长轴的加工过程进行了有限元模拟，确定了滚压力的范围，并对不同滚压套压下量的选取作了具体的研究；对滚压加工过程中的工艺参数进行了分析研究；并用有限元模拟的方法对细长轴加工过程中的应力变化进行了分析，为实际生产中工艺参数的确定打下了理论基础。并从理论上分析了细长轴在经过滚压加工后性能变化。 在理论分析和计算的基础上，在φ9／16型不锈钢滚压机上进行了调试和试验，基本达到了预期的效果。更多还原

【Abstract】 Spindly shaft facade finishing machining is always a difficult problem because of its negative characters, stainless steel spindly shaft not only have the character of common spindly shaft, but also have its own characters, such as low carbon containing, lower toughness, bad cutting capability. These make the stainless steel spindly shaft even more difficult to be machined. Rolling method is a high effective facade finishing machining method. It can improve the fa9ade rigidity, fatigue intensity and smooth degree of the work pieces.In this dissertation we adopted the rolling method to machine the stainless steel spindly shaft, overcomed the negative characters of spindly shaft, and the proportion of spindly shaft’s diameter and height is no longer constrained by ite negetive characters. Makes it possible to machining the spindly shaft in high speed and effectively. In the process of rolling, the movement of rolling sets decide the rolling pressure, the deformation of the spindly shaft and consequently the rolling quality. With the ANSYS analysis software, we can set the movement of the rolling sets and the rolling pressure,and it can display the stress status of the spindly shaft during its rolling process. In this dissertation we studied the moving of the rolling sets in detail, and simulated the rolling process with the ANSYS software combined with the theory of rolling, defined the range of rolling pressure. Also analysis the parameters of the rolling machine, and analysis the stress status change of the spindly shaft during its rolling process with the finite element method. All these works make a basic for the practical producing. Finally we analysis the spindly shaft’s capability change theorily.On the basic of theory analysis and caculating, we adjusted the temple and achieved the expective effect.更多还原