The 6 elements that linear guide rails are evaluated in the application:
1. The precision of the guide and the thermal deformation of the guide rail and the support.
The accuracy of the guiding refers to the accurate level of the moving trajectory when the moving component moves along the guide surface of the Ina linear guide. The main factors affecting the guiding accuracy are the geometric accuracy of the guide surface, the structure type of the guide rail, the contact accuracy of the guide rail pair, the surface roughness, the stiffness of the guide rail and the support, the thickness of the oil film to the lady, and the stiffness of the oil film. .
The geometric accuracy of the linear motion guide generally includes: the straightness in the vertical plane and the horizontal plane; the parallelism between the two guide rail surfaces. The geometric accuracy of the guide rail can be expressed by the error over the full length of the guide rail or the error per unit length.
2, precision persistence
In addition, accuracy persistence refers to the ability of the guide rail to maintain the original geometric accuracy during the working process. The precision persistence of the guide rail mainly depends on the wear resistance and dimensional stability of the guide rail. The wear resistance is related to the data matching, force, machining accuracy, lubrication method and performance of the protective device of the guide rail pair. The residual stress in the guide rail and its support will also affect the accuracy and persistence of the guide rail.
3, motion sensitivity and positioning accuracy
Motion sensitivity refers to the minimum stroke that a moving component can achieve; positioning accuracy refers to the ability of the moving component to stop at a specified position as required. Motion sensitivity and positioning accuracy are related to factors such as guide rail type, friction characteristics, motion speed, transmission stiffness, and quality of moving components.
4, smooth movement
The smoothness of linear guide movement refers to the performance of the Ina linear guide without creeping when moving at low speeds or small amounts of movement. Stability is related to factors such as the structure of the guide rail, the matching of the materials of the guide rail pair, the lubrication condition, the nature of the lubricant and the rigidity of the transmission system of the guide rail movement.
5. Vibration resistance and stability
Stability refers to the performance of no self-excited vibration under given operating conditions. Vibration resistance refers to the ability of the guide rail pair to receive forced vibration and impact.
6, stiffness
This is especially important for precision machinery and instruments. The deformation of the guide rail includes the deformation of the guide rail body and the contact deformation of the guide rail pair, and the ability of the guide rail to resist deformation by force. Deformation will affect the relative position and guiding accuracy between the components. Both should be considered.
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