An interactive knowledge-based system for high-speed spindle design.

摘要

The performance objectives of higher speeds and greater power utilization combined with increased accuracy of the machined surface have magnified the importance of the spindle design process and accentuated the need to develop and integrate computer-based techniques in design.;The structure and function of an interactive system for the process description, preliminary design, and evaluation of spindle-bearing systems for milling is described. Founded on a knowledge-based approach, an "optimized compromise" to the often conflicting spindle design objectives is presented in the form of a conceptual design. The design and analysis system provides a means by which the functional requirements of a spindle may be used to define performance objectives and design parameters in order to enhance the initial design process. Novice designers are guided in the design of a reasonable, well-conceived spindle-bearing system utilizing existing spindle knowledge and empirical data. In addition, the spindle stiffness is optimized for the purpose of maintaining stable machining. The system provides on-line help and explanation capabilities in order to meaningfully describe the significance of influential process parameters affecting the spindle design and to explain the reasoning of system prompts.;Based on the process information, early specification of required product performance and underlying objectives may be utilized to reduce the overall design time as well as the potential of costly redesign. Through the incorporation of both the spindle form and function in the design process, sound decisions and evaluations of design alternatives may be made earlier and a reduction of trial and error iterations may be achieved. In this way, the performance specifications do not rank as merely collateral information for the design but are used to drive the design process.;Finally, a conceptual spindle design model may be effectively employed to predict the characteristic behavior of the final product despite the lack of detailed design information. A more complete evaluation of the conceptual design may significantly reduce the need for exhaustive verification of a spindle-bearing configuration later in the design process and allows for more timely feedback resulting in effective design modification.