1、THK直线导轨的导向精度、THK导轨的触摸精度、THK导轨的布局方式、数控机床动导轨及支承导轨的刚度和热变形、安装质量以及动压导轨和静压导轨之间油膜的刚度。

1. The guiding accuracy of THK linear guide rail, the touch accuracy of THK guide rail, the layout of THK guide rail, the stiffness and thermal deformation of CNC machine tool dynamic guide rail and support guide rail, installation quality, and the stiffness of the oil film between dynamic pressure guide rail and static pressure guide rail.

2、耐磨性好及寿命长THK导轨的耐磨性决议了导轨的精度坚持性。 THK直线导轨沿支承导轨面长时间运转会引起导轨的不均匀磨损，摇臂钻床损坏导轨的导向精度，然后影响机床的加工精度。

2. The good wear resistance and long service life of THK guide rails determine the precision persistence of the guide rails. Long term operation of THK linear guide rail along the supporting guide rail surface can cause uneven wear of the guide rail, damage the guiding accuracy of the guide rail by the rocker drilling machine, and then affect the machining accuracy of the machine tool.

3、THK直线导轨满足的刚度导轨要有满足的刚度，包管在载荷效果下不发生过大的变形，然后包管各部件间的相对方位和导向精度。

3. The THK linear guide rail must meet the required stiffness, ensuring that it does not undergo excessive deformation under load effects, and also ensuring the relative orientation and guidance accuracy between various components.

4、低速运动的平稳性在低速运动时，作为运动部件的动导轨易发生匍匐，进给运动的匍匐，将进步被加工外表的外表粗糙度值，故需求THK导轨低速运动平稳，不发生匍匐，这关于高精度机床特别重要。

4. The smoothness of low-speed motion: During low-speed motion, the moving guide rail, as a moving component, is prone to creeping. The creeping of the feed motion will improve the surface roughness value of the processed surface. Therefore, it is necessary for the THK guide rail to move smoothly at low speeds without creeping, which is particularly important for high-precision machine tools.

THK直线导轨导向精度的影响因素解析图：

Analysis of Factors Affecting the Guidance Accuracy of THK Linear Guides:

工艺性好描绘导轨时，要注意到制作、调整和修理便利；力求布局简略、工艺性好及经济性好。 导轨是进给体系的重要环节，是机床的根本布局要素之一，导轨的效果是导向和支承，即支承运动部件并包管其能在外力的效果下精确地沿着规则的方向运动。

When describing guide rails with good craftsmanship, attention should be paid to the convenience of production, adjustment, and repair; Strive for a simple layout, good craftsmanship, and good economy. The guide rail is an important part of the feed system and one of the fundamental layout elements of the machine tool. The effect of the guide rail is to guide and support, that is, to support the moving parts and ensure that they can move accurately in a regular direction under the effect of external forces.

数控机床机床的加工精度和寿命在很大程度上决议于机床导轨的质量。与一般机床导轨比较，数控机床导轨有更高的需求：如高速进给时不振荡、摇臂钻床低速进给时不匍匐、具有高的灵敏度、能在重载下长时间接连地作业、耐磨性高、精度坚持性好等。 导轨的品种 数控机床用导轨按运动轨道可分为直线运动导轨和圆周运动导轨；按作业性质可分为主运动导轨、进给运动导轨和调整导轨；按受力状况可分为开式导轨和闭式导轨；按触摸面冲突性质，现代数控机床广泛选用的导轨有翻滚导轨和滑动导轨(塑料滑动导轨、静压导轨及动压导轨)。 塑料滑动导轨 滑动导轨具有布局简略、制作便利、触摸刚度大等长处。但传统滑动导轨冲突阻力大，磨损快，动、静冲突因数不一样大，低速时易发生匍匐表象。

The machining accuracy and service life of CNC machine tools are largely determined by the quality of the machine tool guide rails. Compared with general machine tool guides, CNC machine tool guides have higher requirements, such as no oscillation during high-speed feed, no creeping during low-speed feed of rocker drilling machines, high sensitivity, ability to operate continuously for a long time under heavy loads, high wear resistance, and good precision persistence. The types of guide rails for CNC machine tools can be divided into linear motion guide rails and circular motion guide rails according to the motion track; According to the nature of the assignment, it can be divided into main motion guide rail, feed motion guide rail, and adjustment guide rail; According to the force condition, it can be divided into open guide rails and closed guide rails; According to the nature of touch surface conflicts, modern CNC machine tools widely use rolling guides and sliding guides (plastic sliding guides, static pressure guides, and dynamic pressure guides). Plastic sliding rails have the advantages of simple layout, convenient production, and high touch stiffness. However, traditional sliding guides have high conflict resistance, fast wear, and different dynamic and static conflict factors, making them prone to creeping at low speeds.