《装配图的表达方法》PPT课件.ppt

1、Representation Methods of Assembly Drawings 装配图的表达方法,General representation 一般表达方法 Conventional representation 规定画法 Special representation 特殊画法 Simplified representation 简化画法,请点击相应标题显示其内容,General representation 一般表达方法,All the above-mentioned representations are applied to the assembly drawing, inclu

2、ding views, sectional views, cuts, and simplified representations. 前面所介绍的各种表达方法均适用于装配图，包括：视图、剖视、断面、简化画法等。,请 点 击 鼠 标 左 键 显 示 后 面 内 容,Conventional representation 规定画法,If the screwed fastening piece and solid piece are longitudinally sectioned and the cut plane goes through the center of symmetry, thes

3、e parts are represented as though they were not sectioned. 对于螺纹紧固件及实心件若按纵向剖切且剖切平面通过其对称中心时，这些零件按不剖画出。,Section lines in two contiguous metal parts must be in opposite directions or unequally spaced, while section lines of the same part must be consistent in different views. 两个相邻金属零件的剖面线应方向相反或间距不同，而同一零

4、件的剖面线在各个视图中应保持一致。,2. Representing contact surfaces and fitting surfaces of two parts. 零件接触面与配合面的画法,1. Representing section lines 剖面线的画法,3. Representing fastening pieces and solid pieces紧固件及实心件画法,The contact surface or fitting surface of two parts is represented as a line, while the non-contact surfa

5、ce or non-fitting surface is represented as two lines even small clearance. 两个零件的接触面或配合表面只画一条线，而非接触面或配合表面 之间有间隙处应画成两条线。,请点击鼠标左键显示后面内容,If the structure of a certain part is not clearly represented and will thus affect the understanding of its fitting relationship and function, the part must be drawn

6、separately and marked with “xx direction” near the corresponding view indicating with arrows and capital letters the projection direction. 当某个零件的结构未表达清楚，且对理解配置关系或部件功能有影响时, 应单独画出该零件, 并在其上方注明 “零件”, 在相应视图附近用箭头指明投射方向, 并注明相应的大写字母。,To represent the internal details of a machine or assembly, we can represe

7、nt some parts as a cutaway drawing along the fitting surface. In this representation, the section lines of the fitting surface are not needed, but the section lines of parts that pass through the fitting surface are needed. 为了表达机器或部件的内部结构，可采用沿某些零件的结合面剖切的画法，其特点是在结合面上不画剖面线，但穿过该结合面的其他零件，应按剖视画。,2. Singl

8、e piece representation 单件画法,1.Cutting away along fitting surface representation沿结合面剖切,Special representation 特殊画法,请点击鼠标左键显示后面内容,请点击鼠标左键显示后面内容,3. Dismounting representation 拆卸画法,If the fitting relationship or other parts to be represented are behind some other parts, one may assume that the interferi

9、ng parts are removed, and then clearly draw the parts to be represented. Make sure to represent the removed part in other views and mark it as removed xx. 当某些零件遮住了要表达的装配关系或其他零件时，可假想将这些零件拆去后，再画出欲表达部分的视图，但被拆去的零件必须在其他视图中已表达清楚，并应在其上方注明 “拆去件”字样。,Special representation 特殊画法,For the tiny structure of a hol

10、e, the thickness of a thin part, or the clearance shown on the drawing is less than or equal to 2mm, then this part of the drawing may be enlarged. 对于孔的直径、薄件的厚度或间隙在图形上小于或等于2mm时，允许不按原比例而将其适当夸大画出。,4. Enlargement representation 夸大画法,请 点 击 鼠 标 左 键 显 示 后 面 内 容,Special representation 特殊画法,该垫片太薄，不夸大画就无法看出来

11、，故用加倍粗实线画出,5. Imagination representation 假想画法,To represent the moving range or limit location of moving parts or other parts related to the assembly but not belonging to the assembly, draw the contour using a double line with one long and two short dashes. 为了表示运动零件的运动范围或极限位置，或与该装配体有装配关系而又不属于该装配体的其他相

12、邻部件时，可用双点画线画出其轮廓。,请点击鼠标左键显示后面内容,Special representation 特殊画法,手柄的极限位置,用双点画线画出,1. Representation of standard components 标准产品画法,If a cut plane goes through an axis or a symmetry line of standard components, they can be drawn as if they were not cut away. 当剖切平面通过标准产品的轴线或对称中心线时，可按不剖画出其外形。,2. Representatio

13、n of multiple threaded joints and assemblies螺纹联接件画法,If there are several groups of threaded part joints, one only needs to draw one of them and represent the others in the assembly drawing with center lines. 有若干组相同螺纹联接件时，可仅详细画出其中一组，其余只在其装配位置用点画线表示.,In assembly drawings, certain technical structures,

14、 such as round, chamfer, and undercut can be omitted. 对零件的工艺结构，如小圆角、倒角、退刀槽等可省略不画。,Simplified representation 简化画法,请点击鼠标左键显示后面内容,3. Representation of technical structures of parts 零件的工艺结构画法,本 小 节 结 束,谢谢您的认真学习！,退出,前一页,Axonometric drawing of a throttle flap 节流阀轴测装配图,Schematic representation for throttle flap assembly 节流阀装配图,请 点 击 鼠 标 左