The Research And Development On 3D Parameterized CAD System Of Key Parts Of Grinding Machine

CAD is one of the most prominent engineering technologies in the 20th century, which is a key technology in rebuilding of traditional industry and promotion of national economy by means of high and new technologies. With the development of three-dimensional graphic technique and computer techniques, three-dimensional design has been already inevitable tendency of CAD application.As one of important machines for precisely machining, the grinding machine occupies a heavy proportion in them. However, CAD for the grinding machine in our country is mainly on drawing for the parts at present. It hasn't been found any report for the whole grinding machine or its parts are designed in three-dimensional parameterization. Therefore, it's favorable for improving the design technique of the grinding machine and quickly responding to the market requirement to develop a 3D parameterized CAD system of key parts of the grinding machine on the basis of certain figure software. Hence, this thesis presents the study on three-dimensional parameterized CAD system for key parts of the grinding machine, mainly based on feature modeling technology, and the key techniques of implementing the system, mainly utilizing VB and SolidWorks as developing platform instrument, which is a part of key project provided by Changsha's government. The principle of the redevelopment of SolidWorks has been explored in the thesis. The work that the author has done mainly includes several aspects as followed:(1)A basic parameterized graphic library of key parts of the grinding machine, which includes three-dimensional models , assembly drawings and engineering drawings of key parts of the grinding machine, has been set up on the basis of analyzing the restriction and size parameters.(2)A three-dimensional parameterized system of key parts of the grinding machine, which realizes three-dimensional parameterized design of parts, intelligent modification of main size and its tolerance, intelligent navigation of the process of modification, serialization and standardization and optimization of parts, has been designed according to the general process of grinding machines design.(3)The pivotal techniques on the development of the system is been expoundedin detail.(4) A useful function for online help has been developed by programming.(5)General methods of designed for grinding machine and attentive problems of the design process have been discussed in the thesis.The system has several leading features as followed: strong stability, strong extensibility, friendly interface for user, favorable data management, and so on. The principles and the techniques of the system not only fit the requirement of the redevelopment of grinding machines, but also have value to be referenced in the development of special CAD system of other product.