常用图形钣金展开计算公式

1、多节等径直角弯头2、顶圆底长方台1（B＞D）3、顶圆底长方台2（B＜D）4、正心圆锥管展开放样(薄板）目录已知：R(中心半径）700mmn(等分数）16d（外径）600mmN(节数）4t（板厚）4mm周长π（d-t)1871.44mm116.965求得：β30度h/2187.56mmh375.13mm当0°≤αn≤90°时y079.31mmα00y173.28mmα122.5y256.08mmα245y330.35mmα367.5y40.00mmα490当90°＜αn≤180°时y5-30.76mmα5112.5y6-56.84mmα6135y7-74.27mmα7157.5y8-80.38mmα8180已知：顶圆直径D336mm等分数n底长边A670mma1底短边B480mm板厚t10mm高H384mm求tanβ12.2994a651.7tanβ25.3333b460.3β166.4960h1382.0β279.3803h2383.1sinβ10.9170h382.5sinβ20.9829f0507.4cosβ10.3990.5b230.2cosβ20.1841/2*π*d512.6d1326.830mmd2326.171mmd326.500mm当0°≤αn＜90°时f0506.93mma00f1471.16mma122.5f2451.41mma245f3452.87mma367.5当αn=90°时f4474.70mma490f415.16mmm64.08mm余弦定理cosA=(b2+c2-a2)/(2*b*c)cosa0.9916a7.43961622.5mmmmmmmmmmmmmmmm度度度度度已知：顶圆直径D400mm等分数n底长边A600mma1底短边B200mm板厚t4mm高H300mm求tanβ13.0000a592.4tanβ2-3.0000b192.4β171.5651h1299.4当β2＞90时β2108.4349h2300.6sinβ10.9487h300.0sinβ20.9487f0434.2cosβ10.3160.5b96.2cosβ2-0.3161/2*π*d622.0d1396.205mmd2396.205mmd396.205mm当0°≤αn＜90°时f0433.73mma00f1382.24mma122.5f2341.03mma245f3321.29mma367.5当αn=90°时f4329.39mma490f315.03mmm77.76mm余弦定理cosA=(b2+c2-a2)/(2*b*c)cosa0.2921a73.01821622.5mmmmmmmmmmmmmmmm度度度度度已知：底面直径D500mm顶面直径d350mm圆锥管高H300mm求R1031mmr722mmα87.3度L1423mmh508.7mm当α＞180时h508.7mm