Development and Research of Combined Machine Tool CAD System

In today's fast-paced and competitive market, the adoption of combined machine tool CAD technology has become essential. Combined machine tools are specialized equipment made from standardized general components and custom parts tailored to specific machining requirements. These tools are typically designed for single-piece production, which makes the design process complex and time-consuming. Traditional manual methods are no longer sufficient to meet modern demands for technological advancement, quality, and speed. Therefore, integrating CAD technology into the design process is not only a necessity but also a strategic move that enhances efficiency and competitiveness. The application of CAD in combined machine tools has evolved significantly over the years, especially abroad. Starting in the 1970s, countries with advanced manufacturing industries began exploring multi-axis box CAD systems. With the rapid development of computer technology since the 1990s, interactive graphics and database management have become more sophisticated, leading to more practical and widely applicable CAD systems. Many developed nations have already adopted modular machine tool CAD systems, moving toward integrated CAD/CAM solutions. In China, the use of CAD for combined machine tools also began early. In the 1970s, the Dalian Institute of Machine Tools initiated research in this field. By 1978, the country recognized the importance of combined machine tool CAD as a key project in the machinery industry, involving multiple institutions such as Shanghai Jiao Tong University and Dalian Composite Machine Tool Research Institute. Despite initial challenges due to limited hardware and software capabilities, progress was made, laying the foundation for future developments. As the automobile industry became a key sector during the "Ninth Five-Year Plan," the demand for efficient and accurate combined machine tool designs increased. Implementing CAD technology helped shorten design cycles, improve product quality, and boost company competitiveness. For instance, Dalian Composite Machine Tool Research Institute plays a crucial role in advancing automation and innovation within the industry. The technical foundation for developing CAD software has been strengthened by advances in microelectronics and personal computing. Modern microcomputers now offer performance comparable to workstations at a fraction of the cost. Software like Pro/Engineer and I-DEAS have been adapted for Windows environments, making CAD more accessible. The integration of dynamic data exchange, database technologies, and parametric design has enabled the creation of powerful CAD systems tailored for combined machine tools. The combined machine tool CAD system software is built using C++ under the Windows environment. It includes a parametric graphic information management system, allowing designers to efficiently manage both graphics and databases. The software encompasses several modules, including fixture design, three-dimensional line programming, general diagrams, and multi-axis box design. Each module supports interactive design, offering flexibility and adaptability to different machining processes. The fixture CAD system allows for the design of positioning support, clamping mechanisms, and guiding devices using parameterized libraries and performance databases. This ensures accuracy and ease of use. The three-dimensional CAD system enables the creation of detailed assembly drawings and supplementary processing diagrams, while the general CAD system supports both automatic and interactive design approaches. The schematic CAD system helps in generating detailed processing diagrams, which are essential for tool design and adjustment. The multi-axis box CAD system facilitates the design of complex gear transmission systems, optimizing the number of shafts and gears for efficiency. Overall, the combined machine tool CAD software has undergone expert evaluation and is now commercially available. Since its release in 1998, it has gained widespread recognition for its advanced features, reliability, and user-friendliness. It has been successfully applied in numerous enterprises, contributing to improved design quality, enhanced creativity, and greater competitiveness in the industry.

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