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为了夺取优质、高产、低消耗,我厂组织了解决端盖缩孔问题攻关小组,经多次试验、研究分析,取得了一定成绩。电机端盖材料为HT15-33铸铁。其主要壁厚5毫米,热节尺寸为φ19-20毫米。我厂采用手工湿型脱箱造型,质量上要求φ2以上的空穴不许存在,配合面不允许有空穴痕迹。以前我厂铸造电机端盖存在的问题,主要是端盖轴承室根部缩孔严重。因缩孔而造成的报废率高达40～50％。我们分析,缩孔与缩松是由于铸型中的液体金属凝结时所产生的体积收缩,得不到足够的金属液补充,在铸件最后凝固的地方就产生缩孔或缩松。我们认为解决缩孔的基
In order to seize high quality, high yield, low consumption, I plant to solve the problem of shrinkage of the end cap research team, after many trials, research and analysis, and achieved some success. Motor cover material is HT15-33 cast iron. Its main wall thickness of 5 mm, heat section size φ19-20 mm. I plant manual wet unboxing shape, the quality requirements of the hole above φ2 not allowed, with the surface does not allow holes marks. In the past, the problem of casting end caps of our factory was that the shrinkage of the end caps in the end caps was serious. Due to shrinkage caused by the scrap rate as high as 40 ~ 50%. We have analyzed that shrinkage cavities and shrinkage are due to volumetric shrinkage of the liquid metal in the mold during coagulation, insufficient replenishment of the molten metal, and shrinkage or shrinkage at the final solidification of the casting. We think that to solve the shrinkage of the base