粉末冶金挺柱体在柴油机喷油泵上的应用

• 作 者: 舒正平 吴金德 沈周强
• 机 构: 宁波粉末冶金厂,宁波粉末冶金厂,宁波粉末冶金厂,
• 出 处: 粉末冶金技术
• 发表日期: 1982年01期
• 关键词: 精密铸造工艺 加工工序 主要零件 零件结构 批量投产 材料利用率 零件磨损 装车试验 上下滑动 表观硬度

挺柱体是柴油机喷油泵的主要零件之一。该零件结构复杂、精度要求高,原先采用20Cr或40Cr钢精密铸造工艺制造,废品率高,加工工序繁琐,材料利用率低。1967年,我厂与汉江油泵油嘴厂协作,进行了A型单缸泵粉末冶金挺柱体的试制(见图1),至今已大批量投产,产量累计达数百万件。1974年,又开始对系列Ⅱ号泵挺柱体进行试制(见图2),现在也达到了小批量投产的水平。

Tappet is one of the main components of diesel injection pump. The parts are complicated in structure and high in precision. Originally, they were made of 20Cr or 40Cr steel precision casting process, with high rejection rate, complicated processing steps and low material utilization rate. In 1967, our factory cooperated with Hanjiang Oil Pump Nozzle Factory to conduct the trial production of the A-type single-cylinder pump powder metallurgy tappet body (see Figure 1). It has been put into large-scale production so far and the output has accumulated to several million pieces. In 1974, the series II pump tappet began trial production (see Figure 2), and now it has reached the level of small batch production.