High-Speed Machining (HSM) is a cutting-edge manufacturing technology that offers significant advantages, including high cutting efficiency, reduced cutting forces and heat, minimal vibration, and improved processing quality. Compared to conventional machining, HSM increases cutting speed, feed rate, and acceleration by 5 to 10 times. This advanced technique requires specialized machine tools, cutting tools, and process parameters, which differ significantly from traditional methods. Due to the variation in workpiece material properties between domestic and foreign sources, it is not feasible to directly apply foreign HSM data. To maximize the value of expensive imported HSM equipment and extend tool life, there is an urgent need to develop a customized HSM technology database tailored for local conditions. This database will serve as a practical reference for domestic enterprises.
The high-speed cutting process database described here was developed through international collaboration between production, research, and academic institutions. As shown in Figure 1, the system consists of two main components: software and process data. The software uses a tree-structured relational database, offering strong management functions and user-friendly operations. It includes a backend database built on SQL Server 2000 and a user interface developed using VB6.0. The user interface connects to the database via ODBC, enabling efficient data retrieval and remote access.
The database contains detailed information on workpiece materials, cutting tools, and process parameters. As illustrated in Figure 2, the structure includes tables for materials, tools, processes, and images. Workpiece material has a major impact on the entire HSM process, influencing tool selection and cutting parameters. Therefore, the database is organized around the workpiece material table, which links to the process table, containing tool details and other critical data. Additionally, a process picture table is included to illustrate the geometry of the workpiece, enhancing the usefulness of the data.
As shown in Figure 3, the material table under SQL Server 2000 includes key mechanical properties such as hardness, tensile strength, and thermal expansion coefficient. These values are essential for accurate process planning. The process table is structured to include spindle speed, cutting depth, feed rate, and other important parameters. It also distinguishes between roughing and finishing operations, with added details on surface finish and accuracy.
The user interface, as depicted in Figure 4, allows users to query and manage data easily. It features a main interface, query interface, and management interface, enabling users to search for materials, select tool types, and retrieve process data. Users can also export data in various formats, such as HTML or TXT, and view it on different systems. The management interface allows for real-time updates without needing to access the SQL Server directly.
The database continues to accumulate data from various HSM applications, including aluminum alloys, steel, and complex three-dimensional surfaces. Examples include high-speed milling of cast aluminum at over 3900 m/min and hard milling of hardened steel molds with surface finishes below 0.33 μm. These cases demonstrate the effectiveness of HSM in improving productivity and tool life.
Looking ahead, the HSM process database will evolve into an expert system accessible via the Internet. By gathering input from domestic partners and securing support from government and industry, this system aims to become a valuable resource for Chinese manufacturers. The continuous accumulation of data ensures that the database remains relevant and adaptable to future technological advancements.
Nodular Cast Iron Manhole Cover
Nodular Cast Iron Manhole Cover,Ductile Cast Iron Manhole Cover,Cast Iron Manhole Cover,Round Ductile Cast Iron Manhole Cover
Wuan Jianfeng Casting Co., Ltd. , https://www.hbjfcasting.com