【正文】
w of the upper or lower face. 再畫反映頂或底面形狀的視圖; Complete three views. 按三等規(guī)律畫全三視圖。 4 Limit elements are usually the boundary between visible and invisible regions of the corresponding projection direction. 轉(zhuǎn)向輪廓線通常是回轉(zhuǎn)面上對(duì)某投射方向可見部分與 不可見部分的分界線。 Method: 方法 It could be obtained on the circle following the projection principle and accumulation. 利用有積聚性的圓投影求之。 points on the surface of a right cylinder 圓柱體表面取點(diǎn) Distinguish: 判別 Label: 標(biāo)注 All invisible points are written in brackets. 對(duì)不可見的點(diǎn)加括號(hào)以示區(qū)別。 請(qǐng)點(diǎn)擊鼠標(biāo)左鍵顯示后面內(nèi)容 Example1. Draw a right cylinder and get points on the surface. 畫圓柱及表面上點(diǎn)的三視圖 Right Cylinder 圓 柱體 5 1. Projection of a cone 圓錐體的投影 Draw steps畫圖步驟 : 請(qǐng)點(diǎn)擊鼠標(biāo)左鍵顯示后面內(nèi)容 Cone 圓錐 體 Draw centrelines and datum lines. 先畫中心線和基準(zhǔn)線; Add view of the lower face. 再畫反映底面形狀的視圖; Complete three views. 按三等規(guī)律畫全三視圖。 6 Element method 輔助 素線法 points on the surface of a cone 圓錐