|
|
|
| Multi-Objective Optimization Design of Micro-Texture of Sliding Guideway in Machine Tool |
| YU Yinghua,WANG Zhiqun,YAO Jinlong, XU Ping |
| Liaoning Technical University, Fuxin 123000, China |
|
|
|
Abstract To explore new ways to meet the requirements of high load-bearing, high-precision and high-precision
retention of its guide rails by CNC machine tools, it is proposed to prepare an elliptical opening offset parabolic micro-texture on the surface of the sliding guide rail. The rectangular sliding block guide rail pair is selected as the research prototype, and its bearing compression force, attrition modulus, exotherm and outside contact stress in the state of exhausted oil are analyzed by the CFD method. Based on the response surface theory, CFD is took on the effect of micro-texture shape arguments on the bearing pressure and attrition coefficient of the guideway was researched, and the optimal micro-texture shape parameters were optimized. On this ground, the effect of the micro-texture distribution arguments on the bearing pressure and attrition modulus of the guideway was researched. The influence law of temperature rise and the optimal micro-texture distribution arguments was also researched. Finally, the load-bearing pressure, friction coefficient exotherm and contact stress in the state of spent oil of the optimal characteristic parameters of the micro-texture guide rail are simulated and analyzed. Comparing the results with the relative performance of the prototype guide rail, the results show that the new micro-texture can increase the pressure bearing strength of the guide rail in the lubricated state by 15.15%, and reduce the friction coefficient, temperature and contact stress in the depleted state by 26.43%, 7.94% and 8.09%.
|
|
|
|
|
|
|
|
|
2022, 
