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一、概述在仪器、仪表、电子和精密机械等工业部门中,冲压件占有很大的比重。为了提高产品质量,加强竞争能力,对冲压件的质量要求越来越高。为此,发展了多种钣料精冲工艺,其中最主要是带齿圈压板的精冲法。但是这种方法也具有某些缺点和局限性,例如,搭边损失大、材料利用率相当低;精冲件不可避免地具有圆角带(图1 b),使得零件周界部分的实际厚度减小,这在零件的尖凸部分(例如齿轮的齿顶部分)尤其严重,从而降低了其使用性能;再者,对于厚钣及低塑性材料,精冲也相当难以见效。
First, an overview In the instruments, meters, electronics and precision machinery and other industrial sectors, stampings account for a large proportion. In order to improve product quality, enhance competitiveness, the quality of the stamping parts are getting higher and higher. To this end, the development of a variety of sheet metal fine blanking process, of which the most important is the ring gear plate fine blanking. However, this method also has some drawbacks and limitations such as large loss of edge, low material utilization, inevitable fillet (Figure 1b), making the actual thickness of the perimeter of the part , Which is particularly severe on the convex parts of the part (such as the tooth tip portion of the gear), thereby degrading its serviceability. Furthermore, fine blanking is quite ineffective for thick sheets and low plastic materials.