三、农机配件的典型造型工艺及工艺分折根据铸造工艺特征,农机配件大致可归纳为九种类型,即实块类、轮环类、法兰盘类、套筒类、管类、轴类、盖罩类、泵壳类及箱体类。现对各类零件分析如下。1.实块类指实心块状件,如油封、接头、并帽、推杆衬套、凸轮轴轴套等。这类铸件一般虽小,但实心块厚,易产生气孔和缩孔,所以一般多采用压边上注式(图7- Third, the typical farm machinery parts molding process and technology points According to the characteristics of foundry technology, agricultural machinery parts can be broadly grouped into nine types, namely real blocks, rings, flanges, bushings, pipe, shaft , Cover cover class, pump shell and box category. Analysis of various parts are as follows. 1. Solid block refers to solid blocks, such as oil seals, connectors, and caps, putter bushings, camshaft bushings and so on. Such castings are generally small, but the solid block thick, easy to produce stomatal and shrinkage, so the general use of pressure-type betting (Figure 7-