To meet the requirements of improving design efficiency and decreasing technique mistakes in the enterprise whose productions are customized by users, a method is introduced to develop CAD/CAPP integrated system. The functions of the integrated CAD/CAPP system developed according to this method include 3D modeling automatically assembled, 2D engineering drawing automatically drawn, process planning sheets automatically filled and parameters of key parts checked and optimized. This method is based on adding special features to the 3D modeling. An example CAD/CAPP integrated system of Metal Bellows Expansion Joints (MBEJ) is developed by using VisualBasic6.0 based on SolidWorks platform. This system can design MBEJ part parameters per GB/T12777 standard. These parameters have been used to generate MBEJ 3D models, engineering drawings and processing planning sheets automatically. All the functions have been integrated in SolidWorks software environment. The drawing paper and processing planning sheets can be modified manually to satisfy special demand.
The active academic basic of the shape tolerance and shape error assessment is a geometrical problem which is based on the shape tolerance zone. The research puts forward the probability distribution of the statistical roundness error on the condition of the researching about roundness error of rotor parts and does experimental measurement and data collection. In order to prove that it complies with certain probability distribution law, the fitted roundness error should gain the statistical distribution result by using mathematical statistics.
On the basis of analysing the quality of traditional working procedure in the production shop, this paper proposes the application of SPC into the quality management system of production shop with the combination of manufacturing conditions in current digital production shop. From the view of selecting the quality parameter of critical manufacturing procedure, this paper diagnoses, analyzes and monitors the quality of the data to promote the application of the quality management system in the digital production shop so as to reduce the manufacturing cost and the quality control cost in the manufacturing process.
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