摘 要 轮毂是电动自行车上极为重要的行驶部件和安全部件，应具有良好的综合力学性能，在正常行驶过程中不应发生变形和疲劳失效。 近几年来半固态加工技术因其节能、高效、环保式生产以及成型件的高性能等诸多优点，得到了世界各国的广泛关注。半固态铸造成形技术不但综合了铸造成形和锻压成形的优点。而且部分产品的性能会接近甚至于达到锻压产品的性能。因此，采用半固态挤压成形工艺来加工电动自行车轮毂将会是一个新的发展方向。 模具在半固态挤压成型方法中是至关重要的一部分，因此，它的设计和制造成了成品件质量的关键所在。 本文对电瓶车轮毂进行二维造型比较形象的展示轮毂的外形。并主要从电动自行车轮毂的发展状况、铝合金的成型与铸造方法、半固态挤压成型工艺及特点，模具总体方案的选择以及模具结构的设计等方面介绍了轮毂半固态挤压模具的设计。该款轮毂的材料采用了铝合金材料（ZL101A），分析了轮毂零件的特点。另外，主要从铸件收缩率、铸型分型面、冒口的设置以及推出机构等几个方面介绍了模具设计的要点。 关键词：轮毂 ;半固态挤压 ;模具设计
ABSTRACT Electric bicycle hub is extremely important safety components and moving parts, should have good comprehensive mechanical properties, in the normal running process should not occur deformation and fatigue failure. Semi solid processing technology in recent years because of its many advantages of energy-saving, high efficiency, environmental protection type production and forming of high performance, obtained the widespread attention all over the world. Semi solid casting technology not only has the advantages of casting and forging. And the performance is part of the product will be close to or even to achieve performance forging products. Therefore, the semi solid extrusion processing technology of electric bicycle wheel hub is a new development direction. Mold in the semi solid extrusion molding method is crucial part, therefore, the design and manufacture of the key quality finished parts where it. Display the battery car wheel hub for two-dimensional modeling visual appearance. And from the main hub of electric bicycle development condition, aluminum alloy molding and casting method, semi solid extrusion process and its characteristics, introduces the design of semi solid extrusion die hub general scheme of the mould and die structure design etc.. The hub is made of aluminum alloy material (ZL101A), analyzed the characteristics of automobile hub. In addition, mainly from the casting shrinkage, mold parting surface, riser set up the institutions and the launch of several crit
