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江苏省73型可调螺距挂桨在苏北水网地区的农船上应用较广。每台挂桨装有4只伞齿轮,采用铣、插、滚、刨、磨等老工艺,费工费料,远远不能满足需要。上海市机械制造工艺研究所和南京粉末冶金厂试验研究用粉末锻造法生产该挂桨上的伞齿轮,取得成功。经把水雾化PDF粉末锻造的伞齿轮与45钢机加工伞齿轮进行长期的跑合试验,其中机加工45钢齿轮为易损件,须经常更换;经航行试验,粉锻伞齿轮使用寿命达4300小时以上,还在继续使用,已超过农机齿轮使用寿命2000小时的要求。
Jiangsu Province, 73 adjustable screw hanging paddle in the northern Jiangsu area on the wider use of agricultural vessels. Each hanging paddle equipped with 4 bevel gears, using milling, plugging, rolling, planing, grinding and other old processes, labor costs, far from meeting the needs. Shanghai Institute of Machinery Manufacturing and Nanjing Powder Metallurgy Factory pilot study of the hanging powder paddle production of the bevel gear, the success. After water atomized PDF powder forged bevel gear and 45 steel machining bevel gear for long-term running-in test, in which 45 steel gears machined for wearing parts, to be replaced frequently; sailing test, the service life of the powder forging bevel gear More than 4300 hours, still continue to use, has exceeded the service life of agricultural gear 2000 hours requirements.