For different CAD platforms, only the corresponding template driver interface needs to be developed to drive the template parts under the platform. Features of Assembly Standards Assembled standard parts are an assembly of a plurality of standard parts in a single piece. The relationship between the assembly and the sub-parts It can be seen from the figure that the assembly standard in the database only needs to record the index information of its sub-parts and all the data combinations of the sub-parts used by the assembly. The details of the sub-parts in the assembly still exist in their respective database records.
Standard parts for single-piece and assembly forms differ in data access. At the same time, the information of the standard parts in the form of an assembly and the standard parts in the form of a single piece also have the same. For example, both the assembly form and the single piece form have non-geometric information, technical conditions and the like.
Database design Because the standard parts in the form of a single piece and the standard parts in the form of an assembly have differences and associations in the description information, the contact part can be established in a unified form, and the difference parts are separated to establish a table structure. The contact part: Main table: The main table records the summary information of all parts. The part ID item is the serial number of the part. Each time a new part record is added to the database, the new part is assigned an ID number in sequence. Even if the existing part is deleted, the allocation of the newly added record ID is not affected. The uniqueness of each standard part ID number. The part name item records the Chinese name of the part.
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