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机床主轴部件包括主轴以及支承系统、传动系统、调整装置等。其中主轴和支承部件是影响主轴工作精度的最重要因素。通常在机床大修及改造中,主轴部件的几何尺寸和强度问题,受到原设计结构的一些限制,不易作较大的改动。只能根据每种机床的不同条件,采取以下提高精度的措施。一、提高主轴的回转精度 1.提高主轴的回转刚度 (1)采用附加支承和中间支承,以及采用主轴传动力矩卸荷装置等,以消除主轴因受力产生的弯曲变形,因为主轴的挠度和变形将直接影响机床的加工精度。主轴传动力矩卸荷装置参看图1。电动机通过连组三角皮带、皮带轮、销钉、橡皮环及盖板,将运动
The spindle components of the machine include the main shaft as well as the support system, transmission system, adjusting device and so on. The main shaft and supporting components are the most important factors that affect the working accuracy of the spindle. Usually in the machine overhaul and transformation, the geometry and strength of the spindle components, subject to some of the original design structure is not easy to make major changes. Only according to the different conditions of each machine, to take the following measures to improve accuracy. First, to improve the accuracy of the spindle rotation 1. Improve the rotation of the spindle stiffness (1) the use of additional support and the middle of the support, as well as the use of spindle drive torque unloading devices to eliminate the bending deformation of the spindle due to stress, because the spindle deflection and Deformation will directly affect the machining accuracy. Spindle drive torque unloading device see Figure 1. Motor through a group of V-belt, pulley, pin, rubber ring and cover, will exercise