REVERSE ENGINEERING REVERSE ENGINEERING Reverse Engineering is a

REVERSE ENGINEERING .

REVERSE ENGINEERING • Reverse Engineering is a process of redesigning an existing product to improve and broaden its functions, add quality and to increase its useful life. • The main aim of reverse engineering is to reduce manufacturing costs of the new product, making it competitive in market. • The duplication is done without the aid of drawings, documentation or computer model. 2

WHY REVERSE ENGINEERING? • The original producer no longer produces the product. • There is inadequate documentation of product. • Some bad features of the product needs to be redesigned. • To update obsolete materials or antiquated manufacturing processes with more current, less expensive technologies. 3

METHODOLOGY PHYSICAL MODEL 3 D SCANNER POINT CLOUD DATA SURFACE MODEL ACCURACY, SMOOTHNESS CAD MODEL 4

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DIGITIZING • Collecting data from physical part. • Used when drawing of object is not available. • Aim is to generate a 3 D mapping of the product in the form of CAD file. • This requires acquisition of surface data, which is large number of points on the product surface. • For this two types of processes are used: contact and non contact method. 6

DISCRETIZATION METHOD Contact method • Requires contact between the component surface & a measuring tool. Non contact method • Uses light as the main tool • Uses white light or laser scanners to scan 3 D objects to generate CAD design. • Uses Coordinate Measuring Machine(CMM), electromagnetic digitizer or sonic digitizers to get desired coordinates. 7

MANIPULATION OF DATA • Basically, after completion of this a CAD model of product is obtained. • Used to fit a geometry to the large number of points obtained from digitizing. • The surface can be mathematically defined as algebraic or parametric surface. • Surface fitting techniques can be of two types: interpolation and approximation techniques. 8

SURFACE FITTING TECHNIQUES Interpolation technique • Surface to be fitted passes through all the data points. • Used when the data points are accurately measured without any errors. Approximation technique • Surface represents a generalized or best fit to the data points. • Used when large number of data points are to be fitted. 9

ADVANTAGES • CAD models are used for manufacturing or rapid prototyping applications. • Hence we can work on a product without having prior knowledge of Cost saving for developing new products. Lesser maintenance costs Quality improvement Competitive advantages the technology involved. 10

APPLICATIONS • MANUFACTURING FIELD: create a 3 D virtual model of an existing physical part for use in 3 D CAD, CAM, CAE or other software and to analyze the working of a product. • MEDICAL FIELD: Imaging, modeling and replication physical model) of a patient's bone structure. • SOFTWARE ENGINEERING: (as a To detect and neutralize viruses and malware. 11

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