插孔(图1)是超小型连接器中的主要接触零件。由于对插孔的技术要求较严格,一般卷圆结构的模具不能达其要求。为保证插孔的质量,在试制的初期,采用单工序工装生产,即落料、弯W形、卷圆、整圆、成形、整形等六道工序。这样所制出的插孔,虽然能基本保证其技术要求,但工序繁多,效率很低,而且由于工序间的废品率累积高达30％以上,故大量生产时不可取。 The jack (Figure 1) is the main contact in a very small connector. As the technical requirements of the jack more stringent, generally round the structure of the mold can not meet its requirements. In order to ensure the quality of the jack, in the trial of the initial stage, the use of single-process tooling production, blanking, bending W-shaped, round, round, forming, shaping and other six processes. Although the jacks made in this way can basically ensure their technical requirements, the number of processes is very low and the efficiency is very low. Moreover, because the rejection rate among processes accumulates up to 30% or more, mass production is not desirable.