Study On Flame Cutting Machine’s CNC System And Mechanical Structure Optimization

Numerical control flame cutting machine is a kind of common cutting equipment, which is in great need by domestic enterprises. But there is still a great gap with developed countries on the research of CNC system, which is mainly in lack of openness, function imperfect and low cutting efficiency. For the insufficient openness of CNC flame cutting’s CNC system, a open control system based on PC and motion control card is studied.A flame cutting machine’s CNC system based on motion controller is raised in this paper. The hardware structure of the CNC system is studied. The type of the motion controller is determined. The general input and output on terminal board is defined meanings based on the auxiliary control process of the CNC flame cutting. Using the test software provided by Googol Company as well as the NC program test the CNC system after the connection of the hardware.The functions of the open CNC system software are analyzed based on the analysis of CNC flame cutting machine’s control and using requirements. The program of the main interface, NC code translator, static simulation function as well as process control function are designed based on windows operating system, VC++6.0 as well as object oriented software programming technique.In flame cutting machine’s cutting process, the uneven factor will have bad effects on incision quality and even produce waste. Automatic height adjust device is needed to realize the equidistance cutting under this condition. As one of the core parts of the height adjust device, micro capacitance detection system’s detection precision will affect the control precision of the automatic height adjust device. The hardware and software of the micro capacitance detection system are designed based on SCM and AD7746 capacitance to digital conversion chip. And the experiment is designed to test the ability of detecting.When the CNC gantry flame cutting machine is working, vibration may occur because of the influence of internal and external incentive. If the vibration amplitude is wide, the cutting precision will be affected. The model of CNC flame cutting machine is build. Model analysis on this model is build. The inherent frequency and vibration model are acquired. Then the optimization design is operated to improve the inherent frequency of the mechanical system.