Study On The Embedded NC System Based On The Open Platform

The NC(Numerical Control System) system of press brake is an intelligent control system that combines control technique, pixel processed technique and bending technique. It needs to read the primitive path drew in the AutoCad, and then use the servo system to bend the different materials and different types of knife materials, process the knife pattern needed. This die cutter pattern is widely used in printing and packaging industry and electronics industry that is closely related to their development, such as cartons, box, shoes, mobile phone sets and so on. So far, after several decades of development, our NC system of press brake’s technique has rolled bending,hitted the bridge site, ut and functions into one,but there are some common problems, such as the primitive operations unconvenient,unstable software operation, especially when the processed pixel is complex, e workpiece it processed will have varying degrees of error and the error has a certain randomness, it is difficult to establish a precise cutting die processed mathematical model. Combining the low-speed.unstability and inaccuracy of the disadvantages the bending machine equipments domestically produced, It is meaningful to study how to rectify the error appeared in the high-speed machining of die cutter.The study mainly include the following:1. The paper studied the major factors for deformation that affected by thin-walled parts in the process in depth.First of all, the model is created by deformation of the thin-wall part with the same material and different thickness based on ANSYS software,and then load is applied、nonlinear solution and simulate. According to the simulation vectors and contours, we could see the distribution of stress and displacement intuitively, the characteristics for the thin-wall part of the force deformation is analysised qualitatively. Second, the paper study the mechanical model of the thin-wall bent under concentrated load, on the base of various kinds geometric boundary conditions which meet the model, calculate the deflection function expression, establish several key factors which affect the deformation.2. The paper combine with elastic properties and some of the main factors during bending for the thin-wall part, introduce the T-S fuzzy control model.We take X-axis step、X-axis step rate of change、Y-axis step、Y-axis step rate of change as the premise input variables for T-S fuzzy logic controller. We take the correction of NC interpolation value as output parameters for T-S fuzzy logic controller. Considering the particularity of the NC system of press brake,the paper only studies the point by point comparison circular interpolation algorithm which is used in the control system.3. The paper studies the MFC-based pixel drew technique and display technique in-depth, studies the line picked algorithm, arc picked algorithm, the ellipse drew algorithm. Against Minor arc drawn into its corresponding major arc phenomenon for the large radius and arc length of the arc is drawn.in-depth analysis of reasons for this phenomenon, put the corresponding solution. Design the pixel interpolation of the data structures and primitive vector graphics information stored in data structures, which create a pretext for the function implementation of the pickup of the pixel, the midpoint interrupted, border interrupted.Proof of on-site commissioning, the system has successfully resolved the length or short of the foot and two feet are death or open in the continuous processing of multiple N type of pixel phenomenon.The system realizes high-speed, high accuracy and stability functions, in addition it has the advantages of pixel pick up speedly and handled conveniently, accesses to customer praise.