滚珠丝杠是机床中很重要的精密零部件，滚珠丝杠其实种类繁多，按照加工方式分有冷轧滚珠丝杠和研磨滚珠丝杠，区别在于是否要进行淬火，滚珠丝杠的丝杆有实心和空心之分，实心的滚珠丝杠是常见的一种，今天我们就来简单介绍一下空心滚珠丝杠。

Ball screw is an important precision component in machine tools. There are actually many types of ball screws, which can be divided into cold-rolled ball screws and ground ball screws according to processing methods. The difference lies in whether quenching is required. The ball screw has solid and hollow screws, and solid ball screws are a common type. Today, we will briefly introduce hollow ball screws.

因为机床的精度有别，那么在机床运行过程中承担重要角色的滚珠丝杠也就有精度的区别。

Because the accuracy of machine tools varies, the ball screws that play an important role in machine operation also have differences in accuracy.

空心滚珠丝杠适合于高精度的机床，空心滚珠丝杠可以很好地配合传送机构的高速运行，尤其是在要求高精度定位时，因为运动会产生热，热胀冷缩，热会使得滚珠丝杠膨胀，为了防止滚珠丝杠的这一变化，空心滚珠丝杠应运而生，空心滚珠丝杠因为是中空的，阻隔了热传导，从而达到冷却的效果。而且因为丝杠轴的中空以及轴两端的标准化加工，是减小热膨胀zui有效的方法。

Hollow ball screw is suitable for high-precision machine tools. Hollow ball screw can cooperate well with the high-speed operation of the conveying mechanism, especially when high-precision positioning is required. Due to the heat generated during movement, thermal expansion and contraction can cause the ball screw to expand. In order to prevent this change in the ball screw, hollow ball screw has emerged. Hollow ball screw, because it is hollow, blocks heat conduction and achieves cooling effect. Moreover, due to the hollow of the screw shaft and standardized processing at both ends of the shaft, it is an effective method to reduce thermal expansion.

空心轴滚珠丝杠主要有以下几个优点：

The hollow shaft ball screw has the following advantages:

1、 稳定的定位精确度

1. Stable positioning accuracy

热膨胀会导致滚珠丝杠的精度减低，由于空心轴抑制了由于温度升高而造成的热胀，所以能够是的滚珠丝杠的精度稳定。

Thermal expansion can lead to a decrease in the accuracy of the ball screw. As the hollow shaft suppresses the thermal expansion caused by temperature rise, the accuracy of the ball screw is stable.

2、 有效防止各部分位移

2. Effectively preventing displacement of various parts

还是通过降低热膨胀的发生，将滚珠丝杠支撑轴和底座位移控制在zui小的范围内，同时空心轴的冷却作用有效地阻隔了对其他部位的热传导，从而避免了工作台因为热而发生变形。

By reducing the occurrence of thermal expansion, the displacement of the ball screw support shaft and base is controlled within a small range. At the same time, the cooling effect of the hollow shaft effectively blocks heat conduction to other parts, thereby avoiding deformation of the workbench due to heat.

3、有效缩短预热时间

3. Effectively shorten preheating time

空心轴冷却作用可以降低温度上升的幅度，从而缩短了设备的预热时间。

The cooling effect of the hollow shaft can reduce the amplitude of temperature rise, thereby shortening the preheating time of the equipment.

4、有效维持滚珠丝杠的润滑性能

4. Effectively maintaining the lubrication performance of ball screws

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