Researh Of Parametric Drawing System Of Few Teeth Difference Reducer Of CHC

Few teeth difference reducer of CHC is a new type of gear transmission device, it has been widely used in many industrial fields,such as chemical industry, water resources and hydropower.lifting transportation, metallurgy,construction machinery, oil engineering,port ship and so on.Few teeth difference reducer of CHC is of serialization products and its different product specification has high similarity of structure pattern relatively,so the repeatability of its design exists and can make product development cycle extended. If we make it one by one, the repeated work will waste a lot.In view of these problems,apply existing development technology reasonably to realize the automatic drafting of component drawings and assembling ones,all of then can meet the requirements of product serialization.In the serialization development of Few teeth difference reducer, Parametric drawing system apply Object technology and parametric design technology, is based on AutoCAD. In Visual Basic6.0integrated programming environment Applies Object technology to exteriorly operates AutoCAD objects through ActiveX Automation interface,under the exploitation of underlying functions,parameters are read from parts information database and standard part database to realize the automatic drafting of component drawings,then achieve the automatic drafting of assembling ones by ObjectDBX technology and extending dictionaries of object.Design data information is transferred from the design and calculation part to parametric drawing part. every parts is connected effectively by data dynamic link,the design and calcutiong part and the parametric one are integrated finally.Users input appropriate parameters in the interface, and then it comes with corresponding drawings subsequently. The system realizes parametric drawing and it has avoided fuzzy work availably, enhanced efficiency greatly.