3、前落料。确定模具零部件的加工工艺,并应用CAD作图。关键词:级进模,两次L型弯曲,零部件的加工工艺。第25页AbstractAnalyze the structure of the belt connection and forming process to design progressive die, measure the size of the workpiece and calculate required pressure. Design the two steps away from the
4、 process workpiece contour, divided into two L-shaped bending process, and bending blanking before the scond time. Confirm the processing of die parts with CAD drawing.Key words: progressive die, twice L bending, machining parts. 第25页1本课题的目的、意义与主要内容1.1目的这