Cutting Processing And Experimental Research For Plastic Doors And Windows Profile

PVC Plastic Doors and Windows are the key energy-saving building products. It has a large market share. Sawing, milling, drilling, etc are the important machining processes of plastic window assembly, the machining quality and efficiency directly affect Windows production quality and efficiency. Owing to the lack of cutting process parameters on plastic window profiles typical processing conditions, the technology level of plastic window processing equipment was restricted. In order to research the machining parameters on the quality of plastic window profiles processing, according to the peculiar physical and chemical properties of plastic window profiles, cutting processing experiments were done to optimize processing parameters, assure processing quality and improve the machining efficiency.Plastic window profiles cutting is the secondary processing of plastic, the properties of materials have important influence on machine. Plastic window profiles'material has a small elastic modulus, low intensity and easy mechanical deformation. Plastic window profiles material has a high linear expansion coefficient, cutting heat causes distortion, the heat still creates workpiece discoloration, soften, melting, etc.Plastic window profile milling experiments were carried out, the force measurement system composed of the NC machining center, Kistler9257B force measurement instrument, a charge amplifier and data acquisition software was established. The orthogonal experiment method was used to study the influence of cutting force of rotational speed, feed speed and cutting depth. The multiple linear regression of experimental data was applied. The cutting force experimental formulas under special cutting conditions were obtained, and were of good significance by regression equation significant statistic test. Experimental results show that, when rotational speed increase, cutting force decreases, and feeding speed increases, the cutting force increases, cutting depth increases, the cutting force increased.Plastic window profile drilling experiments were researched. According to the characteristics of plastic window material processing, rotational speed and feed speed were chosen as cutting variables to study the impact of cutting factors on drilling axial force. Experimental results show that: the axial cutting force increases with the increase of feed. When used flume milling cutter, in the experimental cutting speed range, 31.416 to 78.54 mm/min, feeding on the influence of axial cutting force was a curve almost, presents good consistency, shows that cutting speed has less effect on the axial cutting force. The experimental data was analyzed using multiple linear regression, and the axial drilling force experimental formula was obtained.Aiming at the cutting process feature of plastic profiles, the principal factors that effect profile sawing processing were optimal selected and the experiments were designed. The cutting force in different parameters combinations was measured using Kistler9275B force measurement system. The influence law of feeding speed, cutting width and the cooling wind intensity to plastic profile's cutting force was find, and further analyzed the best combination of feeding speed, cutting width and cooling wind strength. Based on the experiments and data analysis, the experimental data was organized and improved. The result showed that cutting width is the greatest impact factor of cutting force under the premise of guaranteeing quality. Using compressed air as cooling medium could control cutting temperature well.