【摘要】 定轴横轧直接近净成形带有螺旋齿形的螺杆转子是一种新型工艺,轧制耦合曲线是其核心和关键.该轧制工艺中,轧辊和轧件的啮合关系与原有啮合关系有较大差异,因此需要根据轧制工艺需求重新构建具有普遍适用性的轧辊和轧件的耦合曲线.以轧制某型号的螺杆阴转子为例,依据轧辊和轧件的共轭啮合运动关系,构建了适合于定轴横轧工艺的轧辊和轧件耦合曲线的几何模型;结合建立的变换矩阵推导求解了相应耦合曲线的参数化方程,实现了轧制工艺的通用性.三维动态啮合仿真模拟显示啮合过程良好,无冲突干涉现象发生,表明所建立的描述轧辊和轧件耦合曲线的数学模型是正确的.更多还原

【Abstract】 Fixed cross rolling is an improved process to achieve the near-net forming of the screwrotor with big-spiral teeth,and the key of the process is to couple with the profile curves. In the rolling process,the meshing relationship between the roller and the workpiece is different from the original between the screwrotors,therefore,couple profile of the roller and the workpiece need to be redesigned to accommodate to variable rolling forming. Taking a driven rotor as an example,the geometric model of the coupled profile curves of the roller and the driven rotor propitious to fixed cross rolling was rebuilt by means of envelope analysis. Then,using matrix theory,the corresponding parametric equations of the coupled profile curves were established to realize the parametric design of the roller profile and increase technology universality. Finally,the dynamic simulation results verified the correctness of the previous parametric equations and without the interference phenomenon.更多还原