NO3机械图样的表示法(4-局部放大图简化表达方法).ppt

Copyright 2009-2014 Hefei University of Technology均匀分布的肋板及孔的画法;机件上 小平面的画法;对称图形的画法;断开的画法 and so on. 二、简化画法 Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. 对于机件的肋板，如按纵向剖切 ，肋板不画剖面符号，而用粗实 线将它与其邻接部分分开。 规则： 正确 错误 AA AA Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. 9.断开的画法 轴、杆类较长的机件，当沿长度方向形状相同或按一定规律 变化时，允许断开画出。 标注尺寸时，仍注实长 拉杆轴套断开画法 阶梯轴断开画法 实长 实长 Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. 10.对称图形的画法 在不致引起误解时，可只画一半或四分之一，并在对称中心线 的两端画出两条与其垂直的平行细实线。 Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE JDX ZHANGXIANGCHUN All rights reserved. (1)小圆角、小倒角的表示 R2 锐边倒圆R0.5 145 零件图上的小圆角、小倒角允许省略不画，但必须标注 尺寸或在技术要求中加以说明 10.其他 简化画法只介绍了常用的几种，这部分内容较多， 需要时可查阅有关标准。 Copyright 2009-2014 Hefei University of Technology&BENGBU COLLEGE J