A numerical control simulation testing system integrating G code interpreter and graphic simulation is designed.This system used Vc++ as a development tool to edit a G code interpreter according to the agreement GALIL movement control CARDS,which could develop more G codes than original interpreters besides general interpretation and inspection.In addition a three dimensional numerical simulation process was developed with OPENGL technology.By choosing OPENGL as graphics development tools,a numerical simulation system was built through verifying the graphical input processing code to achieve a trajectory simulation and material removal process simulation,and a real-time simulation requirements was realized,which verified the feasibility of the system as a whole.

It introduces the modularization design of mechatronical teaching and practice training system. On this base,uses SIMENS S7-200 PPI protocol to integrate all modules,and the module communicates each other in a single host-slave mode.The application result shows that SIMENS S7-200 PPI network can finely satisfy the request for module communication underlying the environment of mechatronical teaching and practice training system.

Based on the EHL theory of point contact with steady-state Ree-Eyring model,the lubricating status in the point contact zone for ultra high-speed spindle bearings lubricated by oil-air under different working conditions was analyzed by multi-grid method.Through simulating lubricating status between each ball and inner-outer ferrule raceways in bearings,the influence of the working conditions such as running speed,axial preload,contact angle,the ball diameter and the material of bearings on the lubricating status of spindle bearings was analyzed.The results show that film temperature in the point contact zone will have a sharp rise on ultra high-speed,which restricts the increase of rotation speed of spindle bearings;By optimizing the ball diameter and the initial contact angle of spindle bearings,the best lubricating status in the inner contact zone can be achieved;Bearings axial preload has little effect on the lubricating status of spindle bearings.

An interruption of oil supply experiment about a high-speed spindle based on oil-mist lubrication was carried out.B&K Sound/Vibration Analyzer,Infrared Thermal CAM and other apparatus were used to inspect and observe the dynamic characteristics of high-speed spindle,the lubrication state in spindle bearing,the temperature field on high-speed spindle surface and other state parameters under the condition of interrupting to supply oil,and the state parameters were compared with those under normal oil-mist lubrication.The influence of interruption of oil supply on the work performance of high-speed spindle was analyzed.Experimental results indicate that the amount of oil needed in spindle bearing is very small when the high-speed spindle is in normally working.Interrupting to supply oil in a brief time has less influence on the normal work of high-speed spindle,the lubrication state and the thermal state in spindle bearing can maintain in normal work situation.