断面图

1) Heavy lines are used to draw outlines of removed cut. When the cutting plane is passed through the axes of holes or hollows, those features must be drawn as section.
当剖面图形对称时，还可以将移出断面画在 视图的中断处。
4) The cutting plane must be perpendicular to the main outlines of the object, in order to obtain the actual shape of a rib, and the section is usually placed on the prolonging line of the cutting line.
分析并找出断面图中的错误，画出正确断面图。
请点击题目显示其内容
4
本小节结束
谢谢您的认真学习！
前一页
Байду номын сангаас
退出 5
Removed cuts 移出断面
Used to express the holes and grooves in the solid.
用来表达零件上孔、槽等结构处的断面形状。
Points 画图要点:
2. Superposition cuts A revolved cut is used to
3. describe a cross section of a part by revolving it around 4. an axis of revolution and placing it on the views on the axis. 重合断面图 画在视图轮廓线之内的断面图。
重合断面
用来表达杆、肋板及轮辐等结构的断面形状。
Points 画图要点:
1) Thin lines are used to draw the
2) outlines of superposition cuts .
3) 重合断面图中的轮廓线用细实
2)
线画. When it overlaps
the
outlines
内
结构形状。为获得机件结构实形,剖切面
容
一般应垂直机件的主要轮廓线或轴线。
2
Cut sorts 断面图的种类
1. Removed cuts A removed cut is
2. a revolved section that has been removed 3. from the view where it was revolved. 移出断面图 画在视图轮廓线之外的断面图。
the cross section is drawn, which is called a cut.
假想用剖切平面将机件某部分切断，
请
断面图，也可简称为断面。
点
击
鼠
标
A cut is usually used to illustrate the shape of a cutting plane 左
of an object or the holes and grooves in the solid shaft. In order 键
Cuts 断面图
Concept of cut
断面图的概念
Cut sorts
断面图的种类
Exercises
练习题
请点击相应标题显示其内容
1
Concept of cut 断面图的概念
When an assumptive cutting plane is passed through an object,
of
the
view, the outlines must be drawn
completely.
当重合断面的轮廓线与视图中轮廓线
重叠时,视图中的轮廓线需完整画出
而不中断。
3) If the superposition cuts is
断面图应尽量配置在剖切线的延长线上，当 图形不对称时，需画剖切符号及箭头。若未 画在剖切线延长线上,还需加注字母。
3) when the cut view is symmetrical, it can be drawn on the intermitting position of the view.
3
请点击鼠标左键显示后面内容
Exercises 练习题
1. Find out correct drawing from six views.
在给出的6个图形中找出正确的A-A断面图。
2. Analysis and find out the mistakes from cut views and correct it.
to obtain the actual shape of an object, with cutting plane must 显
be perpendicular to the main outlines or axis of the object.
示
断面图一般用于表达机件剖切处断
后 面
面的投影或轴及实心杆件上孔、槽等的
轮廓线用粗实线绘制，当剖切面通过圆孔、 圆坑的轴线时, 这些结构应按剖视图画。
2) The cut is usually placed on the prolonging line of the cutting line. If the shape of the cut is non-symmetrical, it must be labeled with arrows. if the cut is not on the prolonging line of cutting line, it must be labeled with letters.
画肋板的断面图时, 剖切面应垂直于其表面 轮廓线,并将断面图画在剖切面延长线处。
断面图 轮廓线 应封闭
A
A-A
A
回转结构 应按剖视 图画出。
轴结构 切小孔 切键槽 切平面
非回转 结构只 画断面
英国图例
6
请点击鼠标左键显示后面内容
Superposition cuts Used to express the pole、rib and spoke in the solid。