Reading Views of Composite Solids 组合体的读图 Outline of reading 读图要点 Methods of reading 读图的方法 Exercises 练习题 请点击相应标题显示其内容 返回
Outline of reading 读图要点 Methods of reading 读图的方法 Exercises 练习题 Reading Views of Composite Solids 组合体的读图 请点击相应标题显示其内容
Outline of reading 读图要点 1.Understanding the meaning of individual lines and other drawing elements of the view.要读懂视图中图线、线框的含义。 (1)Lines and curves (including circular arcs)represent the following: 视图上图线有直线、曲线（包括圆弧），它们表示： 1)The projection of accumulation planes. 具有积聚性表面的投影。 2)The projection of intersection of two planes. 两表面交线的投影。 3)The projection of the outline of cylindrical surfaces. 曲面轮廓线的投影。 (2)Each closed loop of lines/curves represents: 视图上每一封闭线框可表示： 1)The projection of a plane. 平面的投影。 2)The projection of a curved surface. 曲面的投影。 3)The projection of a curved surface and its tangent plane. 曲面与其切平面的投影。 请点击鼠标左键显示后面内容
2 Outline of reading 读图要点 1. Understanding the meaning of individual lines and other drawing elements of the view. 要读懂视图中图线、线框的含义。 (2) Each closed loop of lines/curves represents: 视图上每一封闭线框可表示: 请点击鼠标左键显示后面内容 (1) Lines and curves (including circular arcs) represent the following: 视图上图线有直线、曲线(包括圆弧)，它们表示: B 1) The projection of accumulation planes. 具有积聚性表面的投影。 2) The projection of intersection of two planes. 两表面交线的投影。 3) The projection of the outline of cylindrical surfaces. 曲面轮廓线的投影。 A C 1) The projection of a plane. 平面的投影。 2) The projection of a curved surface. 曲面的投影。 3) The projection of a curved surface and its tangent plane. 曲面与其切平面的投影。 I Ⅱ Ⅲ
Outline of reading 读图要点 2.Reading several views simultaneously.要几个视图联系起来读 One view may not be able to reveal general space shape of composite solids. 一个视图是不能反映物体的确切形状的，故读图时不可孤立地只看一个视图。 Example 1.Think of the left view from the given front view. 根据主视图，想象其侧视图是何形状。 ©[I 请点击鼠标左裤显示居面内容
3 Outline of reading 读图要点 2. Reading several views simultaneously. 要几个视图联系起来读。 One view may not be able to reveal general space shape of composite solids. 一个视图是不能反映物体的确切形状的,故读图时不可孤立地只看一个视图。 Example 1. Think of the left view from the given front view. 根据主视图,想象其侧视图是何形状。 请点击鼠标左键显示后面内容
Outline of reading 读图要点 2. Reading several views simultaneously.要几个视图联系起来读 When reading drawings,we should not make a conclusion after reading only one or two views.We should carefully compare all views and make a conclusion until they can be fully explained following the principles of projection. 在读图过程中切忌看了一、二个视图就下结论，各视图要反复对照，直至都符合 投影规律时，才能最后下结论。（注意：二个视图有时也不能反映物体的确切形状） Example 2.Think of the left view from given views. 根据主、俯视图，想象其侧视图是何形状。 口 动画 情点击鼠标左键显示后面内容
4 When reading drawings, we should not make a conclusion after reading only one or two views. We should carefully compare all views and make a conclusion until they can be fully explained following the principles of projection. 在读图过程中切忌看了一、二个视图就下结论，各视图要反复对照，直至都符合 投影规律时,才能最后下结论。（注意:二个视图有时也不能反映物体的确切形状） Example 2. Think of the left view from given views. 根据主、俯视图,想象其侧视图是何形状。 请点击鼠标左键显示后面内容 Outline of reading 读图要点 2. Reading several views simultaneously. 要几个视图联系起来读
Outline of reading 读图要点 3.Reading starts from a view that most reflects shape characteristics. 要从反映形状特征的视图读起。 While reading,we must pay special attention to the character view for identifying the basic shape of the composite solid 看图时，应抓住特征视图，确定组合体基本形状。 4.Analyzing relative position and intersection of neighboring surfaces. 要认真分析相邻表面间的相互位置和交线。 While reading,we should also pay attention to relative locations,such as front-and-back,tall-and-low and intersection locations. 读图时，要注意分析相邻面的前后、高低和相交等相互位置。 Example 3.Think of the solid shape from the given top view. 根据俯视图想象该立体的结构形状。 B B C
5 3. Reading starts from a view that most reflects shape characteristics. 要从反映形状特征的视图读起。 While reading, we must pay special attention to the character view for identifying the basic shape of the composite solid. 看图时，应抓住特征视图，确定组合体基本形状。 4. Analyzing relative position and intersection of neighboring surfaces. 要认真分析相邻表面间的相互位置和交线。 请点击鼠标左键显示后面内容 Outline of reading 读图要点 While reading, we should also pay attention to relative locations, such as front-and-back, tall-and-low and intersection locations. 读图时，要注意分析相邻面的前后、高低和相交等相互位置。 Example 3. Think of the solid shape from the given top view. 根据俯视图想象该立体的结构形状。 A B C