上海华通开关厂对拼块式级进模使用相当普遍。拼块式级进模具有制造方便、精度高、寿命长、维修简单和冲制工件尺寸精度易保证等优点。拼块式级进模的主要结构特点如下:1.级进模的凹模中所有刃口型腔都采用拼块拼合而成,要求每件拼块的型孔轮廊都能进行成形磨削。2.级进模中弯曲部分也按弯曲工序每道分开组成拼块,如果某一道弯曲中形状复杂难 Shanghai Huatong switch plant on the use of block-level progressive die is quite common. Pieces cascade progressive die with manufacturing convenience, high precision, long life, easy maintenance and punching the workpiece size and easy to ensure the accuracy of the advantages. The main structural features of the block-type progressive die are as follows: 1. All the cutting-edge cavities in the progressive die are made by assembling the blocks, and the forming wheel holes of each block can be shaped and ground . 2. Progressive mode bending part of the bending process is also divided into separate parts each block, if the shape of a curved complex difficult