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随着国民经济和工业技术的迅速发展,为获得紧凑的机械结构,减少产品受热面所占的空间位置,对减小管子弯曲半径不断提出了新的要求,在工艺上小R弯管技术得到了不断的发展。在理论上管子最小弯曲半径可按下述方法确定: 1.根据弯管横断面畸变程度(椭圆度)的限制来确定: 断面畸变系数a=B-H/D=0.07时确定无芯轴弯管时最小弯曲半径。 r_最小=R_最小/D=9.25(0.2-δ/D)～(1/2)式中:r_最小—最小相对弯曲半径 R_最小—最小弯曲半径
With the rapid development of the national economy and industrial technology, in order to obtain compact mechanical structure and reduce the space position of the heating surface of the product, new requirements are constantly put forward to reduce the bending radius of the pipe. In the process, the small R elbow technology is obtained The continuous development. In theory, the minimum tube bending radius can be determined as follows: 1. According to the elbow cross-section distortion (ellipticity) to determine the limit: Sectional distortion coefficient a = BH / D = 0.07 when no mandrel bending Minimum bend radius. r_minimum = R_min /D=9.25(0.2-δ/D)~(1/2) where: r_minimum - minimum relative bending radius R_minimum - minimum bending radius