Abstract： Aiming at the forming process for powder metallurgy of engine timing belt pulleys, the timing belt pulleys were designed according to structural characteristics of the timing pulleys and powder metallurgy mold design principles and using the principle of forming speed equaling to forming rate. The forming die was developed by the modulus design method. The forming mandrel design method for positioning holes was proposed. Through installing the assembly diagram by designed mold diagrams, the feasibility of the designed forming mold was analyzed theoretically. The reasonableness of the forming mold design was verified by mold installation experiments. The results show that the pilot productions of timing pulleys after sintering process meet to the need of customer in terms of technical indicators such as accuracy and performance. The profile accuracy and the mold life are improved, thus the engine timing pulleys mold is successful developed.

Keywords: timing pulley; powder metallurgy; mold design; forming technology

中图分类号：TB21        文献标志码：A

文章编号：1008-5548(2015)02-0093-05

DOI:10.13732/j.issn.1008-5548.2015.02.024

收稿日期：2014-08-05， 修回日期：2014-08-12，在线出版时间：2015-04-17。

第一作者简介：徐永刚（1987—），男，硕士研究生，研究方向为汽车制造工艺。 电话：18765428608，E-mail：xyg1987925@126.com。