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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 scope of this project was to design and development of a portable shredder machine; focuses on chopping of coconut leaves, Areca leaves and paddy straw, later this chopped powder is a source to prepare the vermin compost. The task started with the accumulation of information and data, through survey in agricultural and literature studies. Existing models are hand wheel operated, vertical and horizontal electric chopping shredder is prone to have problems like large space requirement, uneven cutting, and manpower requirement. Hence traditional methods are not sufficient and satisfactory for chopping the crop residues. Considering the user's needs and buying capacity a prototype was designed and constructed. The proposed prototype is so designed to guide materials in different compartments by power driven transmission through chain, belt, pulley and spur gear attachment to have a chopped and powder materials. The overall operation of the proposed shredder, running at a cutting speed of 700 RPM nearly has a cutting efficiency up to 90%.

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