一、引言在机械产品设计中,键作为轴毂的联接件使用最为广泛。由于键已成为标准件或标准参数,所以联接件一键的设计主要是选型设计或标准参数的选择设计。传统的设计方法不但速度慢,而且经济性也较差(型号过大)。利用现代设计方法可借助计算机改变传统的设计模型,使得键的设计更趋合理,提高设计速度,产生较佳的经济效益。轴毂联接的计算机辅助选型设计主要包括以下几个方面:1.择定联接形式及键的类型;2.键的优化选型设计;3。圆整相 I. INTRODUCTION In the design of mechanical products, the key is the most widely used coupling of the hub. As the keys have become standard parts or standard parameters, so the design of a key link is the choice of design or standard parameters of choice. The traditional design method not only slow, but also poor economy (model too large). The use of modern design methods can use the computer to change the traditional design model, making the key design more reasonable and improve the design speed, resulting in better economic efficiency. Computer-aided design of hub coupling design mainly includes the following aspects: 1. Select the type of connection and the type of the key; 2. Optimization of key design selection; 3. Round phase