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一、概述从动人字轮和斜齿轮,是五型抽油机850型减速器中的二种铸钢齿轮。机械性能要求较高,选用材料为 ZG35CrMo合金结构铸钢。由于货轮坯加工表面很多。特别在轮缘的牙齿部分,质量要求较高,运转中要平稳,因此不许毛坯产生缩孔、缩松、气孔、砂眼、裂纹等缺陷。为了做好这二种齿轮毛坯,严格要求控制工艺操作,特别要注意冒口和浇口正确放置,以减少各种缺陷的产生。
I. Overview Slave characters and helical gears, five-type pumping unit 850 reducer in the two kinds of cast steel gear. High mechanical requirements, the selection of materials for the ZG35CrMo alloy steel structure. As the cargo billet machining surface a lot. Especially in the teeth part of the rim, the quality requirements are high, the operation should be smooth, so the blank is not allowed to produce shrinkage, shrinkage, porosity, trachoma, cracks and other defects. In order to do a good job of these two kinds of gear rough, strict control of process operations, with particular attention to riser and gate correctly placed to reduce the production of various defects.