A study on the analysis of Friction Force for Ballscrew
碩士 === 國立中興大學 === 機械工程學系所 === 97 === This study focuses on improvement of current friction models for ball screw mechanism. The models applied were based on models used for prediction of friction in ball bearings - Harris and linear guides - Tan. No experiment was done as a part of this study. The d...
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| Format: | Others |
| Language: | en_US |
| Online Access: | http://ndltd.ncl.edu.tw/handle/54727451221367544431 |
| Summary: | 碩士 === 國立中興大學 === 機械工程學系所 === 97 === This study focuses on improvement of current friction models for ball screw mechanism. The models applied were based on models used for prediction of friction in ball bearings - Harris and linear guides - Tan. No experiment was done as a part of this study. The data for simulation were taken from PhD thesis “Precision Control of High Speed Ball Screw Drives” by Kamalzadeh which was aimed to Ball screw control. The ball screw friction characteristic data measured in his thesis was used in this study to compare various ball screw friction models.
Three models were evaluated with the available simulation data using MATLAB. The first was the ball screw friction model by Olaru. A significant miss match between the simulation data and the model results was found.
The second model was based on the model of friction for viscoelastic materials which was successfully used for prediction of friction in linear guides with micro balls. It was found that it is not useful for friction prediction in common size ball screws.
The third model used for simulation was based on friction in ball bearings. The original model used for ball bearings was simplified by several assumptions to increase efficiency. The results of this model were in a good agreement with the experimental data provided in the PhD thesis mentioned above and thus the simplifications proved to be acceptable.
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