Research And Development Of CNC System For Precision Roller Mold Machine Tool

Microstructured surfaces are widely used in backlighting units,optical systems,traffic signs,drag reducing films,due to their specially designed textures and features.Therefore,related manufacturing technology has become a research hotspot.Roll-to-roll(R2R)forming technology can continuously roll continuously,and the microstructure of the roll mold surface can be transferred to the PET film by UV curing technology.The core technology of R2 R production process is the processing of roller mold with optical microstructure on the surface.At present,the key roller mold processing technology is monopolized by foreign industrialized countries.Therefore,it is important to study the machine tools that can realize the surface mold processing of microstructures and develop the numerical control system that meets the processing requirements,which is of great significance for realizing the low cost and mass production of microstructured optical components.This paper takes the precision roller part processing machine as the research object,firstly analyzed the mechanical structure of the machine tool,and according to the functional characteristics of the roller part processing machine tool,follows the open development trend of the numerical control system,adopts the industrial computer + UMAC controller(IPC+ UMAC)’s dual CPU structure,equipped with linear motor,driver,grating scale and other hardware,built the hardware system of the open CNC system.Based on the modular design method,the software system function design was carried out,and the human-machine interaction precision roller machine numerical control software was developed on the Windows platform,which realizes the axis information display,motion control,automatic programming,and program editing operation integrated.For several microstructured surfaces,the automatic generation of processing code was realized.According to the functional requirements of the machine tool,the NC code was parsed and compiled,and subroutines were written so that the CNC system can recognize and execute the general NC code processing program.The programming characteristics of PLC program in UMAC were studied.The PLC program was designed to realize the functions of logical movement such as handwheel and zero return.The molding principle and processing method were analyzed for two important and common microstructure arrays.A spiral continuous machining method was used for the micro V-groove array,which has higher processing efficiency and the error is also within the controllable range.Finally,the processing experiments of micro V-groove array and quadrangular pyramid array were carried out.The surface morphology of the microstructure was measured and analyzed.The results show that the CNC system has abundant functions and stable operation,which can meet the processing requirements of the precision roller machine tool.