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Guide rail drawing and precision requirements
Source: China Bearing Network Time: 2014-09-01
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1. Select guide rail data, conflict surface hardness matching and surface finishing and heat treatment methods.
2. Determine the gap of the guide rail pair, public service and machining accuracy.
3. According to the working conditions and bearing characteristics of the guide rail; select the layout type, sectional shape and combination method of the guide rail.
4. A sleek method of selecting guide rails; depicting smooth systems and protective equipment.
5. Select the compensation method and adjustment equipment after the wear of the guide rail surface.
6. Perform mechanical calculation of the guide rail; determine the layout scale.
7. Select the preload load of the guide rail; depict the loading method and equipment for the preload load.
Precision requirements for rails:
1. Stiffness:
2. Motion sensitivity and positioning accuracy:
The guide rail resists the ability of the force deformation. The guide rail deformation includes the deformation of the rail body deformation guide rail; both should be considered. The deformation will affect the relative orientation and guiding precision between the components; this is especially important for precision machinery and instruments.
Accuracy persistence refers to the ability to adhere to the original precision during the operation of the guide rail. The wear resistance is related to the data matching, force, machining accuracy, smoothing method and the function of the protective equipment of the guide rail pair; The residual stress in the support also affects the accuracy of the guide rail. The accuracy of the guide rail depends mainly on the wear resistance of the guide rail.
The precision of a linear motion guide usually includes: the straightness in a straight plane and a horizontal plane, and the parallelism between the two rail faces. The accuracy of the rail can be indicated by an error in the entire length of the rail or an error in the unit length.
3. Vibration resistance and stability:
The guiding precision refers to the accuracy of the moving track when the moving member moves along the guide surface of the guide rail. The primary factors affecting the guiding precision are the precision of the guide surface of the guide rail, the layout type of the guide rail, the touch precision of the guide rail pair, the appearance roughness, and the guide rail. And the rigidity of the support member, the oil film thickness of the guide rail pair and the oil film stiffness; and the thermal deformation of the guide rail and the support member.
4. Precision persistence:
5. Steering accuracy:
The motion sensitivity refers to the minimum stroke that the moving component can complete. The positioning accuracy refers to the ability of the moving component to suspend the specified orientation according to the demand. The motion sensitivity and positioning accuracy and the rail type, collision characteristics, motion speed, transmission stiffness, moving component quality, etc. Related to elements.
Anti-vibration refers to the ability of the guide rail to accept forced oscillation and impact; and stability refers to the function of not exhibiting self-oscillation under given working conditions.
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