Automation of production systems for improvement in production efficiency and manufacturing flexibility has become one of the key issues in manufacturing industry and the only way to achieve this, the realization of a computer integrated manufacturing environment in which computer aided systems work together with an integrated approach to support the life cycle of a product leading to enhancement of production efficiency to a greater extent. In this paper we will discuss the important role of the product data exchange standard STEP in the integration, as well as how to apply STEP in the development of our STEP-based CAD/CAPP/CAM integrated system and presents a framework is proposed to support integration of CAPP with CAD system. After analyzing the STEP AP-214 neutral file, a method for extracting the basic features of automotive part from STEP AP-214 of 3D model is proposed.

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The Cutting process used in milling is one of the most common type of industrial machining methods. Similar to traditional milling spindles, the motor driven spindles are fitted with an integrated motor, thereby eliminating belts and gears for the transmission of power from the motor to the cutting tools. The innovative machine tools should be highly characterized systems in order to retain the necessary precision, efficiency and reliability. To satisfy their end user's reliability and availability requirements, both the spindle system (Tool/Tool-Holder/ Spindle) and motor tool system need to be configured for their usability and output results. However, the quality of a control device in industrial practice is greatly affected by the spindle cutting output and its reliability. The motor spindles are nothing but the rotating drive shafts which acts as axes for cutting force tools or in machining process for holding cutting instrument. Hence the spindles are one of the important factor in machining tool process and productivity, as these are used to produce parts as well as machines that produce components, which in turn have a significant impact on production levels and quality of products.