电器元件中的触头大多用HPb59-1黄铜制造。这类零件在大批量生产时都是将铸造后的型材热轧、冷拉、切断、钻孔及攻螺纹而成。然而对于没有拉、轧设备的工厂要生产不同形状的触头可用挤切法制造。 此法的工艺过程是: (1)将已熔炼配好成分的HPb59-1液态黄铜用砂型浇铸成棒材,断面形状根据零件断面放1～2mm加工余量。 Most of the contacts in electrical components made of brass HPb59-1. Such parts in the high-volume production are cast after the profile of hot-rolled, cold drawn, cut off, drilling and tapping made. However, there is no pull, rolling equipment factory to produce different shapes of contacts can be squeezed cut manufacturing. The process of this method is as follows: (1) HPb59-1 liquid brass which has been melted with good ingredients is cast into a bar with a sand shape, and the cross-sectional shape is put into a machining allowance of 1 to 2 mm according to the cross section of the part.