Abstract: This paper mainly realizes the automatic design of product 3D model. In view of the characteristics of UG design software, a top-down design method is chosen to build a good product framework before the product is set, and then adjust the structure according to the actual key parameters, and the model can be regenerated quickly without the failure of regeneration. Using the parameter linking function of UG software, with the part template and the class thought of computer advanced language, the top-down and fully parameterized design of the product is realized. The function of a new model of a series of products can be generated by changing the top level parameters related to the actual engineering only. At the same time, the data of late production and procurement are exported quickly. This method has simple principle, easy mastery of structural designers and repeated use of modeling for a time. It has a broad application prospect for the rapid design of series product projects.

Key words: Household appliances, Auto design, Secondary development