介绍基于虚拟样机技术的现代产品设计流程，分析虚拟装配技术在产品设计中的作用。

The modern production design process based on the virtual prototyping was introduced here, and the action of the virtual assembly in the design was analyzed.

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介绍了UG软件中的虚拟设计、虚拟装配、优化分析技术，并基于虚拟设计的思想，运用UG软件对真空注型机的门铰链进行虚拟建模、装配和优化分析。

And used UG software for the virtual design, assembling and optimal analysis of the vacuum casting machine door gemel, based on virtual design idea.

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