我厂每年都要为矿山制造或修理球磨机的球面轴瓦。该轴瓦内径φ800mm、外径φ1420mm、重量950kg。以往浇注巴氏合金时质量较难控制,常有局部气孔或脱壳现象发生。为提高浇注质量,我们经过长期探索,基本上掌握了一套比较适用于浇注大型轴瓦的生产工艺,近几年来按这一工艺进行生产均取得了满意的效果,现将该浇注工艺简单介绍如下。 (1)轴瓦清洗。首先采用三角刮刀刮光不易被除掉的局部锈斑,然后再用碱水洗刷,除掉轴瓦上的油污,最后用稀硫 I plant each year for the manufacture or repair of the ball mill ball bearings. The bearing inner diameter φ800mm, outer diameter φ1420mm, weight 950kg. In the past when the quality of pouring pasteurized alloy difficult to control, often local stomatal or shelling phenomenon. In order to improve the quality of casting, we have basically mastered a set of production technology that is suitable for casting large bearing shells after long-term exploration. In recent years, we have achieved satisfactory results in this process. Now we introduce the casting process as follows . (1) Bearing cleaning. First of all, using a triangular scraper scraping is not easy to get rid of the local rust, and then wash with alkali, remove the oil on the bearing, and finally with dilute sulfur