我厂从西德引进的R942液压挖掘机驾驶室前窗支撑机构是由几种含有镶铸件的零件组成。西德进口原机上这些零件是压铸成型的。但我厂因为设备条件所限无法压铸,并且批量小经济效益低,外厂不肯生产。如果用实心浇铸法制造需整套模具,材料消耗大,生产时间长,还要增加金加工量。为此我们参阅国内有关资料,结合我厂生产条件的实际情况,试验研究以湿砂型镶铸法来代替压铸及实心浇铸法生产这类零件,获得成功。我们从零件结构、砂箱选择、镶铸工艺等方面综合分析考虑,经多次工艺性实验证明镶铸工艺是成功的。铸件经解剖检查和制成品零件装在驾驶室 I plant imported from West Germany R942 hydraulic excavator cab front window support mechanism is composed of several parts containing castings. West Germany imported the original machine parts are die-formed. However, due to the limitations of equipment, our factory can not die-casting, and small batch economic benefits, the factory refused to produce. If you use the solid casting method to produce the entire set of molds, material consumption, production time is long, but also increase the amount of gold processing. To this end, we refer to the relevant domestic information, combined with the actual conditions of our factory production conditions, the pilot study to wet sand-based casting instead of die-casting and solid casting production of such parts, a success. We from the parts structure, sandbox selection, inlaid casting process and other aspects of a comprehensive analysis and consideration, after several technological experiments show that the casting process is a success. Castings were dissected and machined parts were installed in the cab