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煤矿机械产品壳体类零件大多数为铸借件．由于济类零件多为单件小批量生产，因此生产周期较长，成本较高，质量不稳定。我们在分析研究其结构特点及加工特性后，将铸借结构改进为焊接结构．取得了较好的效果。1课题的提出我厂生产的PB－0．3扒斗装岩机，其传动部分的巨完：如囹
Most coal mining machinery shell parts are castings. Because economic parts are mostly single-piece small-batch production, the production cycle is longer, the cost is higher and the quality is unstable. After analyzing and studying its structural features and processing characteristics, we improved the casting structure to a welded structure. Achieved good results. 1 issue put forward I plant production of PB-0.3 bucket mounted rocker, the transmission part of the giant end: such as 囹