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Reverse Engineering
Presented By:
Ananya Upadhyay
ME/AMS/10006/15
1
Birla Instituteof Technology,Mesra
Reverseengineering
• Reverse Engineering is a process of
redesigning an existing product to improve and
broaden its functi...
why reverseengineering?
• The original producer no longer produces the
product.
• There is inadequate documentation of pro...
Methodology
Physicalmodel
3D scanner
Pointclouddata
SurfaceModel
CAD readiness, Accuracy, Smoothness
CADmodel
4
5
Digitizing
• Collecting data from physical part.
• Used when drawing of object is not available.
• Aim is to generate a 3D...
Discretizationmethod
Contact method
• Requires contact between
the component surface & a
measuring tool.
• Uses Coordinate...
Manipulationof data
• Basically, after completion of this a CAD
model of product is obtained.
• Used to fit a geometry to ...
Surfacefitting techniques
Interpolation technique
• Surface to be fitted passes
through all the data points.
• Used when t...
Generationof functional part
• The geometric model obtained, can be used as
the basis for variety of operations.
• Operati...
Advantages of reverse engineering
• RE typically starts with measuring an
existing object, so that a solid model
can be de...
Applications
• ManufacturingField: To create a 3D virtual model
of an existing physical part for use in 3D
CAD, CAM, CAE o...
Thank You
13
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Reverse engineering

reverse engineering and details of methodology and applications

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Reverse engineering

  1. 1. Reverse Engineering Presented By: Ananya Upadhyay ME/AMS/10006/15 1 Birla Instituteof Technology,Mesra
  2. 2. Reverseengineering • 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
  3. 3. why reverseengineering? • 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
  4. 4. Methodology Physicalmodel 3D scanner Pointclouddata SurfaceModel CAD readiness, Accuracy, Smoothness CADmodel 4
  5. 5. 5
  6. 6. Digitizing • Collecting data from physical part. • Used when drawing of object is not available. • Aim is to generate a 3D 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
  7. 7. Discretizationmethod Contact method • Requires contact between the component surface & a measuring tool. • Uses Coordinate Measuring Machine (CMM), electromagnetic digitizer or sonic digitizers to get desired coordinates. Non contact method • Uses light as the main tool • Uses white light or laser scanners to scan 3D objects to generate CAD design. 7
  8. 8. Manipulationof 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
  9. 9. Surfacefitting 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
  10. 10. Generationof functional part • The geometric model obtained, can be used as the basis for variety of operations. • Operations such as automated process planning, automated manufacturing, automated dimensional inspection and automated tolerance analysis. 10
  11. 11. Advantages of reverse engineering • RE typically starts with measuring an existing object, so that a solid model can be deduced in order to make use of the advantages of CAD/CAM/CAE technologies. • CAD models are used for manufacturing or rapid prototyping applications. • Hence we can work on a product without having prior knowledge of the technology involved.  Cost saving for developing new products.  Lesser maintenance costs  Quality improvement  Competitive advantages 11
  12. 12. Applications • ManufacturingField: To create a 3D virtual model of an existing physical part for use in 3D CAD, CAM, CAE or other software and to analyze the working of a product. • Medical Field:Imaging, modeling and replication (as a physical model) of a patient's bone structure • Software engineering: To detect and neutralize viruses and malware. 12
  13. 13. Thank You 13

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