480/80R42无内胎半钢农业子午线轮胎的设计

介绍480／80R42无内胎半钢农业子午线轮胎的设计。结构设计：外直径1829．5mm，断面宽467mm，行驶面宽度421．2mm，行驶面弧度高20．5mm，胎圈着合直径1066．5mm，胎圈着合宽度397mm，断面水平轴位置（H1／H2）0．9494，花纹深度52mm，花纹饱和度24．7％，花纹周节数20。施工设计：胎面采用冷喂料挤出、缠绕法成型，胎体采用2层2100dtex／2V1锦纶66浸胶帘布，带束层采用3＋9＋15×0．22＋0．15HT钢丝帘线，钢丝圈采用西1mm的19”镀铜高强度胎圈钢丝，采用二次法成型技术、单模胶囊硫化机硫化。成品轮胎试验结果表明，轮胎的充气外缘尺寸和物理性能均符合相应设计和国家标准要求。

Design of 480/80R42 Tubeless Steel Belted Agricultural Radial Tire

The design of 480/80R42 tubeless steel belted agricultural radial tire was described. In the structure design,the following parameters were taken：overall diameter 1 829.5 mm,cross-sec- tional width 467 mm,width of running surface 421.2 mm,arc height of running surface 20.5 ram, bead diameter at rim seat 1 066.5 mm,bead width at rim seat 397 mm,maximum width position of cross-section （H1/H2） 0. 949 4,pattern depth 52 mm,block/total ratio 24.7%,and total number of pitches 20. In the construction design, the following processes were taken：cold feed extrusion and winding process for tire tread. 2 layers of 2100dtex/2V1 nylon 66 dipped cord for carcass ply, 3＋9＋15×0.22＋0.15HT steel cord for belt,and φ1 mm 19# copperized bead wire for bead. The tire was built using two-stage process and cured in bladder press. It was confirmed by the test of the finished tires that, the inflated peripheral dimension and physical properties met the requirements in design and national standard.