毛坯图 meaning in Chinese
blank drawing
Examples
- First calculation method : doing horizontal projection drawing on drawing piece , k value is introduced by area equation of projection drawing , k value is obtained by area equation , along outline of projection drawing to add k value , that is , outline shape of blank drawing , principle area - equal and shape similar are used . second calculation method : along outline of drawing piece horizontal projection drawing , to do normal line of penetration line for wantonly point of this point , to obtain high of drawing piece on this point normal line , point and point is to form outline shape of blank
计算方法之一为k值法:作拉深件水平投影图,在该投影图面积方程中引入k值,利用面积相等原理解方程,求得k值,沿水平投影外沿加上k值,即为毛坯图的外廓形状。计算方法之二为拉深线法:沿拉深件水平投影图外廓,在任意点作该点切线的法线,在该法线上以该点拉深件的高度为量,在法线上取截点。