Views 视 图 Principle views and directional views 基本视图及向视图 Partial views 局部视图 Oblique views 斜视图 Exercises 练习题 请点击相应标题显示其内容 Principle views and directional views 基本视图及向视图 Principle views: There are six orthographic views when.

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Transcript Views 视 图 Principle views and directional views 基本视图及向视图 Partial views 局部视图 Oblique views 斜视图 Exercises 练习题 请点击相应标题显示其内容 Principle views and directional views 基本视图及向视图 Principle views: There are six orthographic views when.

Views 视
图
Principle views and directional views
基本视图及向视图
Partial views
局部视图
Oblique views
斜视图
Exercises
练习题
请点击相应标题显示其内容
Principle views and directional views
基本视图及向视图
Principle views: There are six orthographic views when project to six projection planes.
基本视图
分别向六个基本投影面投射,便得到六个基本视图。
First angle method
第一角画法(E法)
仰
Bottom
右
Right
主
Front
左
Left
Third angle method
第三角画法(A法)
顶
左
前
后
Rear
Top
Left
Front
右
后
Right Rear
底
俯
Bottom
Third angle symbol
第三角符号
Top
First angle symbol
第一角符号
Relative position 相对位置关系:
ObserverObjectprojection plane
观察者物体投影面
ObserverTransparent projection plane Object
观察者透明投影面物体
All views must accord with the projection rules and be arranged and meantime the view names needn’t be signed.
各视图之间的位置应符合投影规律,此时一律不标注视图的名称。
Far from front view showed the front side of the object, but third angle on the contrary.
其他视图中远离主视图的一侧,表示物体的前面,而在第三角画法中则表示其后面。
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Principle views and directional views
基本视图及向视图
If the views are not placed following the requirement of orthographic
projection, view name “×” must be signed above the view, an arrow is
used to show the projective direction in corresponding views, and the
same letter must be signed. Such view is called directional view.
向视图:若各视图不按照既定的位置关系配置,应在视图的上方用大写拉丁字母注出视
图名称,在相应视图附近用箭头指明投射方向,并注上同样的字母,该视图称为向视图。
A
A
B
B
Example 1. Draw all projection views in first and third angle.
画出物体的第一、三角基本视图。
Example 2. Draw four views in third angle projection.
用第三角画法画出物体的主、俯、左、右侧视图。
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C
C
局部视图
Partial views
Partial views :It is some part of an object’s projection view.
局部视图 只将机件的某一部分向基本投影面投射所得到的视图。
可省略
Point 作图要点:
1. Arrow signed with letter is used to
show the projection direction near the
corresponding view and the name should
be signed above the partial view.
A
用大写拉丁字母和箭头指明表达部
位及投射方向,并在局部视图上方标
注相应的大写拉丁字母;
2. When the partial view is placed according to
the projection rules and there are no other
views between the principle view and the
partial view, all the signs can be omitted as
another partial view.
当局部视图按投影关系配置,中间又
无其他图形隔开时,可省略标注;
3. Waved lines are used to illustrate the
rupture boundary in partial views. When the
partial structure is integrated and the outline is
closed, the waved line can be omitted.
局部视图的断裂边界应以波浪线表
示。当所表示的局部结构是完整的,
且外轮廓线又成封闭时,波浪线可省
略不画。
A
A
A
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斜视图
Oblique views
An auxiliary view is projected by using a profile reference plane
paralleling the oblique surface that is called oblique view.
斜视图:将机件上的倾斜部分投射到与该部分平行的辅助投影面上而得到的视图。
字母应保
持垂直不
可倾斜!
Point 作图要点:
90°
A
1. Arrow signed with letter is used to show the projection
direction near the corresponding view and the name “×”
should be signed above the oblique view.
用大写拉丁字母和箭头指明表达部位及投
射方向,在斜视图上方注写出相同的字母。
2. Oblique views can be drawn as partial oblique views to
express oblique part forms only, the rupture boundary is
expressed by continuous thin irregular line.
斜视图只需表达机件倾斜部分的形状,其断
裂边界应以波浪线表示。
↻
3. oblique views should be placed according to
projection rules. It is permitted to rotate oblique views,
but it is required to sign the name “×” and the rotation
direction “ ”or “ ” .
↺
斜视图应按投射关系配置,若斜视图不画在
投射方向延长线上,则应转正画出,并在其上
方注明相应大写拉丁字母及旋转方向
或
(旋转角度应小于90°)。
↺
A
A
↻
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Exercise: Draw those views projection from A、B and C.
A
画出所给机件的A向、B向局部视图和C向斜视图。
B
A
A
C
C
C
B
将C向视图画在
将C向视图转正后
投射方向上
画在其他位置
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本 小 节 结 束
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1. Draw all projection views in first and third angle.
画出第一、三角的所有基本视图。
Third-angle method
第三角画法(A法)
First-angle method
第一角画法(E法)
Rear
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Left
Top
Right
Front
Bottom
2. Draw four views in third angle projection.
采用第三角画法,画出主、俯、左、右侧视图。
P
Top
Left
R
L
Front
Right
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F
First and third angle projection
第一、第三角示意图
There are four quadrants in the space
将空间分为四个象限(角)
Object at first angle
物体在第三角
Object at third angle物
体在第一角
First angle projection 第一角投影示意图
Object at third angle物
体在第一角
Third angle projection 第三角投影示意图
Object at first angle
物体在第三角
First angle method symbol
Third angle method symbol
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在图片上点击鼠标左键可以“暂停”或再次“播放”
在图片上点击鼠标左键可以“暂停”或再次“播放”
在图片上点击鼠标左键可以“暂停”或再次“播放”
在图片上点击鼠标左键可以“暂停”或再次“播放”
在图片上点击鼠标左键可以“暂停”或再次“播放”
在图片上点击鼠标左键可以“暂停”或再次“播放”