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球形容器 U 形托板和球形容器及其支柱都相贯(见图1),它由半圆环和直段两部分几何体组成(见图2),用放样法展开十分麻烦,而且不准确,用坐标计算法求其展开尺寸既简便又准确,可以节省工时,提高质量。U 形托板的计算关键在正确的建立这三个物件的坐标方程式(如图1)。空间直角坐标oxyz,oxz 平面为托板的对称面。已知球形容器外半径 R,主柱外半径 r,主柱中心轴线距球形容器垂直中心轴线 a_b 托板半圆环内半径 P_n,托板厚 S,托板半圆环外半径 pw=p_n+S,托板直段长 c(图2)托板半圆环中心轴线与球形容器外皮交点 o,与立柱外皮交点 o′,将坐标系 oxyz 平移使坐标原点为o′,得到新坐标系 o′x′y′z′,x 轴与 oxz 平面内的球形容器水平中心轴线相距。
Spherical container U-shaped pallet and spherical container and its columns are intersecting (see Figure 1), which consists of semi-circular ring and straight section of the two parts of the geometry (see Figure 2), staked out with a very troublesome, but not accurate, Coordinate calculation method to expand its size is simple and accurate, you can save hours and improve quality. U-shaped pallet calculation key in the correct establishment of these three objects coordinate equation (Figure 1). Orthogonal coordinates oxyz, oxz plane for the pallet symmetry plane. Known spherical container outer radius R, the outer diameter of the main column r, the central axis of the main column perpendicular to the spherical container center axis a_b hemispherical radius p pallet, pallet thickness S, pallet semicircular outer radius pw = p_n + S, pallet straight section length c (Figure 2) Pallet semi-annular central axis and spherical container skin intersection o, and the column skin intersection o ’, the coordinate system oxyz translation so that the coordinate origin o’, get a new coordinate system o ’X’y’z’, the x-axis is spaced from the horizontal central axis of the spherical container in the oxz plane.