Standards There are many types of uniform standard parts in different classification methods. Therefore, there are many methods for classification. Each of them can classify standard parts, but the categories are not satisfactory. The integration of multiple classification methods forms a unified classification method. As shown, the classification, retrieval and modification of standard parts have practical significance.
1Standard parts classification method Uniform classification principle Affiliated standard function Thread form Head shape Local feature category Value 1～101～101～21～991～99 Category example National standard National military standard Aviation industry standard Aerospace industry standard Connection fastening support transmission Ordinary thread MJ thread hex head round head square 90° countersunk head with split pin hole without split pin hole with slot as shown, the standard selected by the user corresponds to a unique number, and there are multiple standards corresponding to the same number. Users can select the standard classes they need based on the classification criteria they need.
The flow of the parameter matching algorithm to implement the parameter matching algorithm is as shown. The parameter matching algorithm flow, in which the function of the DataRemedy function mainly utilizes the condition of the known parameter, and supplements the unknown parameter one by one with the SQL statement. The structure of the SQL statement is as follows: Select (target column name) from (name) where (condition 1) (dath 1) and (condition 2) (da 2). Therefore, the process of supplementing the data one by one can be transformed into the determination process of the target column name, the target name, the condition, and the formula, and the algorithm is as follows.
a. The target column name is indeed by sequentially reading the column names in the column name set that are matching data. b. In all of them, loop through the column name, the first name to find the column name is the target name. c. Search for the other column names in the known parameters in turn to find the conditions and styles.
According to the above algorithm, the SQL statement can be successfully generated. If you execute a SQL statement and get a multi-valued collection (such as a specification size can have multiple length choices), then add all the elements of the collection to the Combo control, waiting for the user to select. The process is as shown.
Users can select by industry standard and by classification tree type, in which a specific standard type can be selected, and on the right is a 3D model preview of the standard. When the standard is selected, the 6 standard selection interface can be used for parameter selection. After the parameter selection is complete, the Pro/E assembly state is entered. The check section is now primarily for fastener checks, including tight, loose, and dynamic load modes. The three check methods are only different in the parameter selection and check formula, and the interface is similar.
Conclusion Based on the standard database system of network database, it is easy to transplant and easy to expand. It is suitable for multi-CAD platform applications and solves the problem of duplication of standard parts library construction between different CAD platforms. The calibration module of the standard parts can realize the calibration calculation of the standard parts, enhance the reliability of the standard part design, and improve the design efficiency of the standard parts. User-defined modules and user rights management modules are implemented in the system. The whole system runs stably, the algorithm is universal, and the standard parts are complete, which solves the conflict between the current different standards. It provides a reference for the establishment of foreign standard parts library system, and has a good reference for the secondary development of other three-dimensional parameterized software.
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