在实际加工中,常常会遇到用圆截面棒料加工矩形、三角形、梯形和T形等非圆截面工件,需要确定毛坯直径。通常工艺人员为了简化计算将T形、梯形截面按矩形截面处理,这样做不仅浪费材料,而且加工量大,很不经济。此处介绍几种截面毛坯直径的计算公式及有关参数计算,确定合理的毛坯最小直径,为划线、加工提供方便。正多边形、直角三角形 In actual processing, often encounter the use of circular cross-section bar processing rectangular, triangular, trapezoidal and T-shaped non-circular cross-section of the workpiece, the need to determine the rough diameter. In order to simplify the calculation, the technicians generally process the T-shaped and the trapezoidal cross-section according to the rectangular section, which not only wastes the material, but also has a large amount of processing and is not economical. Here are several cross-section rough diameter calculation formula and the calculation of relevant parameters to determine the minimum diameter of a reasonable blank, crossed, processing convenience. Regular polygons, right triangles