Explore the five principles of linear guide design

- Jan 23, 2020-

Explore the five principles of linear guide design

At present, linear guides play an important role in transmission components, and almost all intelligent lathes are in use. With the high requirements for product quality, precision and efficiency, this part is even more essential. We all know that linear guides are a kind of precision transmission components. When designing and manufacturing the time difference, the accuracy used will be thousands of miles.


       The first point is the principle of non-interference in accuracy. The accuracy of linear guides does not affect each other during manufacturing and use, thereby obtaining a higher accuracy factor.


       The second point is the principle of automatic fitting of linear guides. In order to make the guide rail highly accurate, it is necessary to make the guide rail pair have the characteristics of automatic bonding. The horizontal guide rail can be fitted according to the weight of the moving component; other guide rails need additional spring force or roller pressure to cooperate.


       The third point is the principle of proximity of dynamic and static friction factors. When designing the contact surface of the linear guide, the secondary guide should be close to the dynamic and static friction coefficients, so that you can get higher repeat positioning accuracy and stability, the friction coefficient is smaller, and the static and dynamic friction coefficients are easier to approach a certain value.


       The fourth point is the principle of compensating force deformation and thermal deformation. The linear guide rail and its support may be deformed when subjected to force or temperature changes. Therefore, when the guide rail and its support are designed, the corresponding shape needs to be formed after deformation. For example, the beam guide of a gantry machine is made convex to compensate for bending deformation caused by the weight of the headstock.


       Fifth, the principle of all contacts. To fix the length of the linear guide, it is necessary to ensure that the moving guide is at the two extreme positions of the maximum stroke and make full-length contact with the fixed guide to ensure that the linear guide pair can complete the entire contact during the contact process and make it perfect.