Research On Numerical Control System Of Laser Processing Device For Inner Surface Texture Of Sliding Friction Pair Of Cylinder Liner And Cylinder Block

As the power source of many mechanical equipment,the internal combustion engine is widely used in the mechanical field.The sliding friction pair between the cylinder block and the Piston Ring is the main motion pair of the internal combustion engine,the energy loss caused by friction is more than half of the total energy loss of internal combustion engine.in order to improve the friction and wear condition of the inner surface of cylinder liners and non-cylinder Liners,the method of using laser to process the inner surface of the fabric with a certain regularity came into being.A large number of theoretical studies and experiments have proved that the machining of the micro-texture on the contact surface of the friction pair of cylinder liner and Piston Ring can greatly improve the lubrication performance,reduce the oil consumption and prolong the service life.Based on the Windows system,the hardware and software architecture of the CNC system for laser machining cylinder liner and the CNC system for the inner surface texture of the cylinder block without cylinder liner are constructed,the process of laser machining is simulated and verified by experiments.According to the Modular design method of laser processing hardware system,a new kind of nested laser head with adjustable focus and rotatable sleeve is designed,in which a nanosecond fiber laser is selected as the processing light source.In the motion control part,the PC is used to control the multi-axis motion controller,and the multi-axis motion controller is used to control the laser,the servo driver and the servo motor.The experimental platform is built to realize the relative motion of the laser light source with respect to x,Y,Z and four axes of the workpiece surface.In the architecture design of the system software,two modules are divided according to the function task: Vector Drawing Parameter Identification and NC machining.In Visual Studio 2013.Net integrated development platform,using c #language,mainly rely on dynamic link library technology to achieve software development.By calling the Dynamic Link Library of teigha.net,the feature parameters of DWG file can be identified without Auto CAD platform,which makes the expression and processing of composite parameters texture more intuitionistic.By calling the Dynamic Link Library of the multi-axis motion controller,the functions of the multi-axis motion controller are invoked,including interpolation motion,input and output state control,etc..Reasonable design of the human-computer interaction page,and strive to a high degree of software integration,processing personnel to simplify the operation.Aiming at the uncontrollability of the precision and efficiency of laser machining concave cavity,the process of removing gray iron material by nanosecond pulse laser ablation was simulated with COMSOL Multiphysics simulation platform,based on this data model,the possibility and the optimal repetition rate of the multi-point continuous machining path for a single cavity are explored,and verified by experiments.