DKBA华为技术有限公司企业技术规范DKBA4031-2003.06钣金结构件可加工性设计规范2003-06-30发布2003-07-XX实施华为技术有限公司发布密级：内部公开/秘密DKBAXXXX.X-2002.XX目次前言..............................................................51范围和简介.........................................................61.1范围..................................................61.2简介..................................................61.3关键词................................................62规范性引用文件.....................................................63冲裁...............................................................63.1冲裁件的形状和尺寸尽可能简单对称，使排样时废料最少。..63.2冲裁件的外形及内孔应避免尖角。........................63.3冲裁件应避免窄长的悬臂与狭槽..........................73.4冲孔优先选用圆形孔，冲孔有最小尺寸要求................73.5冲裁的孔间距与孔边距..................................83.6折弯件及拉深件冲孔时，其孔壁与直壁之间应保持一定的距离83.7螺钉、螺栓的过孔和沉头座..............................83.8冲裁件毛刺的极限值及设计标注..........................93.8.1冲裁件毛刺的极限值...............................93.8.2设计图纸中毛刺的标注要求.........................94折弯..............................................................104.1折弯件的最小弯曲半径.................................104.2弯曲件的直边高度.....................................104.2.1一般情况下的最小直边高度要求....................104.2.2特殊要求的直边高度..............................114.2.3弯边侧边带有斜角的直边高度......................112024-10-01,23:12:362密级：内部公开/秘密DKBAXXXX.X-2002.XX4.3折弯件上的孔边距.....................................114.4局部弯曲的工艺切口...................................124.4.1折弯件的弯曲线应避开尺寸突变的位置..............124.4.2当孔位于折弯变形区内，所采取的切口形式..........124.5带斜边的折弯边应避开变形区...........................134.6打死边的设计要求.....................................134.7设计时添加的工艺定位孔...............................134.8标注弯曲件相关尺寸时，要考虑工艺性...................144.9弯曲件的回弹.........................................144.9.1折弯件的内圆角半径与板厚之比越大，回弹就越大。..144.9.2从设计上抑制回弹的方法示例......................145拉伸..............................................................155.1拉伸件底部与直壁之间的圆角半径大小要求...............155.2拉伸件凸缘与壁之间的圆角半径.........................155.3圆形拉伸件的内腔直径.................................155.4矩形拉伸件相邻两壁间的圆角半径.......................155.5圆形无凸缘拉伸件一次成形时，其高度与直径的尺寸关系要求165.6拉伸件设计图纸上尺寸标注的注意事项...................165.6.1拉伸件产品尺寸的标准方法........................165.6.2拉伸件尺寸公差的标注方法........................166成形..............................................................166.1加强筋...............................................176.2打凸间距和凸边距的极限尺寸...........................176.3百叶窗...............................................172024-10-01,23:12:363密级：内部公开/秘密DKBAXXXX.X-2002.XX6.4孔翻边...............................................187附录..............................................................197.1附录A：高碳钢、低碳钢对应的公司常用材料牌号列表......197.2附录B压印工艺、压花工艺简介.........................207.2.1压印工艺................................
