摘要：本设计是以EX-106数控车床主轴部件为主要内容。 主轴部件由主轴,主轴轴承和安装在主轴的传动件,密封件等组成。合理配置轴承可以提高主轴精度、降低温升和简化支承结构。数控车床主轴组件是机床实现旋转运动的执行件,它直接带动工件参加表面成形运动是机床上的一个关键部件。本次设计中，主要是对EX-106数控车床的主轴，主轴轴承及其密封润滑进行设计。
本次设计中，采用的轴承配置方式是：双向推力球轴承+双列圆柱滚子轴承。本课题中数控车床的转速较高，却要求径向刚度好，所以轴承的配置型式选择为刚度速度型。36398
润滑采用的是油润滑高速主轴（如角接触球轴承），发热较多。为控制其温升，希望润滑时兼起冷却的作用。采用油润滑，用空气冷却的方法。由于主轴前端采用了双列圆柱滚子轴承，速度较高，致使发热较多，所以采用油润滑，在润滑时也起冷却的作用。后端采用的是曲路密封为防止油液外漏，用油润滑双列圆柱滚子轴承。
密封方式由于前、后端轴承端盖通孔和轴之间的密封属于动密封。前端轴承为角接触球轴承，转速较高，采用油润滑，为防止油液甩出，此处采用了毡圈油封；后端轴承也采用油润滑，此处用迷宫式密封，利用其节流的作用达到密封的效果，且间隙中充满着润滑油，密封效果更好。
数控车床，主轴选用楔形带传动，主轴主要是车削加工，必须保证其加工精度，而带传动能缓和冲击、吸收振动，故传动平稳。由此选用一级带传动变速方式。
主轴检测方面，主轴编码器采用与主轴同步的光电脉冲发生器，两根轴通过皮带轮传动1:1地同步传动。
毕业论文关键词：数控车床；主轴部件 ； 主轴轴承；润滑密封；编码器
Design of spindle components for EX-106 numerical control lathe
Abstract: This design is the main content of the main parts of the EX-106 NC lathe.. The main shaft parts are made of the main shaft, the main shaft bearing and the transmission parts of the main shaft, and the seal parts.. The reasonable configuration of the bearing can improve the accuracy of the main shaft, reduce the temperature rise and simplify the structure of the bearing.. The spindle module of NC lathe is the implement part of the machine tool, which directly drives the workpiece to participate in the surface forming motion. It is a key part in machine tool.. This design, the main axis of the EX-106 CNC lathe, spindle bearings and its sealing lubrication design.
The design of the bearing configuration is: two-way thrust ball bearings + double row cylindrical roller bearings. In this paper, the speed of NC lathe is high, but the radial stiffness is good, so the bearing configuration is chosen as the stiffness velocity type..
The lubrication uses is the oil lubrication high speed spindle (such as angular contact ball bearing), the fever is more. To control its temperature rise, it is hoped that the role of the lubrication and the cooling effect is. Oil lubrication and air cooling method. As the main axis of the front of the angular contact ball bearings, higher speed, resulting in more heat, so the use of oil lubrication, lubrication also played a cooling role. The rear end uses the curved path (labyrinth) seal to prevent the oil leakage, the oil lubricated double row cylindrical roller bearing.
Seal the way due to the front, rear end bearing cap hole and shaft seal between the shaft belongs to the dynamic seal. Front bearing for angular contact ball bearing, high speed, the use of lubricating oil, to prevent oil thrown out. Here, we use the felt oil seal; back-end bearing is lubricated by oil, here with labyrinth seal, the throttle is utilized to achieve the effect of sealing and gap in full lubricating oil, and the sealing effect is better.
NC lathe, the spindle selection of the wedge belt drive, spindle is mainly turning, must ensure that its processing accuracy, and belt drive can ease the impact, absorb vibration, so the transmission is smooth. From this selection of a belt transmission mode. EX-106数控车床主轴部件设计及CAD图纸:http://www.751com.cn/jixie/lunwen_34818.html