Engineering is the process of designing, manufacturing, assembling, and
maintaining products and systems. There are two types of engineering,
forward engineering and reverse engineering. Forward engineering is the
traditional process of moving from high-level abstractions and logical
designs to the physical implementation of a system. In some situations,
there may be a physical part/product without any technical details, such as
drawings, bills-of-material, or without engineering data.
The process of duplicating an existing part, subassembly, or product,
without drawings, documentation, or a computer model is known as reverse
engineering. Reverse engineering is also defined as the process of obtaining
a geometric CAD model from 3-D points acquired by scanning/ digitizing
In the intensely competitive global market, manufacturers are constantly
seeking new ways to shorten lead times to market a new product. Rapid
product development (RPD) refers to recently developed technologies
and techniques that assist manufacturers and designers in meeting the
demands of shortened product development time.
By using reverse engineering, a three-dimensional physical product or clay
mock-up can be quickly captured in the digital form, remodeled, and exported
for rapid prototyping/tooling or rapid manufacturing using multi-axis CNC
Reverse Engineering –The Generic Process
The generic reverse engineering process is a three-phase process depicted in
The three phases are scanning, point processing, and
application specific geometric model development.
Why use Reverse Engineering?
Reverse engineering based design methodology.
Following are some of the reasons for using reverse engineering:
The original manufacturer no longer exists, but a customer needs the
product, e.g., aircraft spares required typically after an aircraft has
been in service for several years.
The original manufacturer of a product no longer produces the product,
e.g., the original product has become obsolete.
The original product design documentation has been lost or never existed.
Creating data to refurbish or manufacture a part for which there are no
CAD data, or for which the data have become obsolete or lost.
Inspection and/or Quality Control–Comparing a fabricated part to its CAD
description or to a standard item.
Some bad features of a product need to be eliminated e.g., excessive wear
might indicate where a product should be improved.
Analyzing the good and bad features of competitors’ products.
Exploring new avenues to improve product performance and features.
Creating 3-D data from a model or sculpture for animation in games and
Creating 3-D data from an individual, model or sculpture to create, scale,
or reproduce artwork.
The course is designed for Engineers having an intermediate CAD knowledge,
who are extensively involved in product design and development. The course
will develop a clear understanding of complete reverse engineering
methodology and techniques involved in it with an extensive focus on rapid
At the completion of the course the participants will have an in depth
The reverse engineering methodology and techniques.
Reverse engineering hardware for contact, non-contact and destructive
scanning like coordinate measuring machines, active 3-D stereo vision
techniques, sheet light range imaging, X-ray tomography.
Reverse engineering software’s classification with pros and cons of
Selection criteria’s for reverse engineering techniques.
Data points post processing, sampling techniques.
Curve and surface creation using NURBS based surfaces.
CAD model manipulation for application oriented model generation.
Rapid prototyping, Rapid tooling and Rapid manufacturing.
Available RP techniques, their integration with reverse engineering and
data processing for rapid prototyping.
Usage of Rhino3D Nurbs based RE software package for
completion of a detailed design project.
course will be comprised of 03 three modules with major contents elaborated
The course will also include an extensive design project requiring practice
and implementation of all major techniques taught in the course. The project
will require designing of a facial prosthesis from point cloud data of a
human face and will involve extensive usage of surface modelling techniques
and will help promote the understanding of the overall reverse engineering
based design methodology.
The NURBS based CAD modelling package Rhinoceros 4.0
will be used for the project.
assignments will also be given to familiarize students with the package and
eventually student will be required to discover the features of the software
and manipulate given point cloud data using techniques elaborated in
lecturers into a realistic nasal prosthesis model as shown in figure below.
This course is intended
for product designers, drafters, and industrial / conceptual designers.
People in other design related roles will also benefit from taking this
The minimum suggested course duration is 42 hours which includes in
lab lecturers and practice on software.
Course Fee = Rs: 15,000.00