Reverse EngineeringReverse engineering is the process of converting an existing physical product into drawings or digital models; involves discovering the technological principles of a device, object, or system through analysis of its structure, function, and operation.

Reverse engineering (RE) is the process of taking something (a device, an electrical component, a software program, etc.) apart and analyzing its workings in detail, usually with the intention to construct a new device or program that does the same thing without actually copying anything from the original.

Resulting knowledge gained through the reverse-engineering process can then be applied to the design of similar products and that capitalizing on successes and learning from the shortcomings of existing designs is the objective of reverse engineering.
Research and development is a specific problem-solving approach that is used intensively in business and industry to prepare devices and systems for the marketplace.

Did you want to shift manufacturing of a part to a different partner company and realized that you don't have actual manufacturing drawings?

Did you want to make design changes to an assembly and noticed that you don't have the drawings for it?

Is the local scanning shop charging you a ransom to reverse engineer a part?

Do you have a concept that you carved out or modelled with your hands, which you want to be manufactured to the exact level of detail?

Send us those parts and we will have manufacturing drawings made for you!

Our company has dealt with customer requirements on a wide scale - be it complexity or size, our team can help you with your challenge.

We have carried out work involving class A surfaces as well as electronics intensive consumer products. We have worked on castings, forgings and injection moulded parts - parts that are as small as a couple of millimetres as well as those that are several feet in dimensions.

Technology at Australian Design & Drafting lies in skilled hands. Our mechanical engineers come with broad industry experience and have product development and manufacturing experience.

They have designed and prototyped products that are complex. A few examples of our efforts include complex automotive castings, investment cast components used in aircraft engines, medical devices and injection moulded furniture. Industries that we have served range from hi-technology, medical, consumer electronics to the machine tool, automotive and aerospace.

Engineering is the profession involved in designing, manufacturing, constructing, and maintaining products, systems, and structures. At a higher level, 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 without any technical details, such as drawings, bills-of-material, or without engineering data, such as thermal and electrical properties.

The process of duplicating an existing component, subassembly, or product, without the aid of drawings, documentation, or computer model is known as reverse engineering.

Reverse engineering can be viewed as the process of analyzing a system to:

  1. Identify the system's components and their interrelationships
  2. Create representations of the system in another form or a higher level of abstraction
  3. Create the physical representation of that system

Reverse engineering is very common in such diverse fields as software engineering, entertainment, automotive, consumer products, microchips, chemicals, electronics, and mechanical designs. For example, when a new machine comes to market, competing manufacturers may buy one machine and disassemble it to learn how it was built and how it works. A chemical company may use reverse engineering to defeat a patent on a competitor's manufacturing process. In civil engineering, bridge and building designs are copied from past successes so there will be less chance of catastrophic failure. In software engineering, good source code is often a variation of other good source code.

In some situations, designers give a shape to their ideas by using clay, plaster, wood, or foam rubber, but a CAD model is needed to enable the manufacturing of the part. As products become more organic in shape, designing in CAD may be challenging or impossible. There is no guarantee that the CAD model will be acceptably close to the sculpted model. Reverse engineering provides a solution to this problem because the physical model is the source of information for the CAD model. This is also referred to as the part-to-CAD process.

Another reason for reverse engineering is to compress product development times. 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 reduced product development time. For example, injection-moulding companies must drastically reduce the tool and die development times. By using reverse engineering, a three-dimensional product or model can be quickly captured in digital form, re-modelled, and exported for rapid prototyping/tooling or rapid manufacturing.

Following are reasons for reverse engineering a part or product:

  1. The original manufacturer of a product no longer produces a product
  2. There is inadequate documentation of the original design
  3. The original manufacturer no longer exists, but a customer needs the product
  4. The original design documentation has been lost or never existed
  5. Some bad features of a product need to be designed out. For example, excessive wear might indicate where a product should be improved
  6. To strengthen the good features of a product based on long-term usage of the product
  7. To analyze the good and bad features of competitors' product
  8. To explore new avenues to improve product performance and features
  9. To gain competitive benchmarking methods to understand the competitor's products and develop better products
  10. The original CAD model is not sufficient to support modifications or current manufacturing methods
  11. The original supplier is unable or unwilling to provide additional parts
  12. The original equipment manufacturers are either unwilling or unable to supply replacement parts or demand inflated costs for sole-source parts
  13. To update obsolete materials or antiquated manufacturing processes with more current, less-expensive technologies

Reverse engineering enables the duplication of an existing part by capturing the component's physical dimensions, features, and material properties. Before attempting reverse engineering, a well-planned life-cycle analysis and cost/benefit analysis should be conducted to justify the reverse engineering projects. Reverse engineering is typically cost-effective only if the items to be reverse engineered reflect a high investment or will be reproduced in large quantities. Reverse engineering of a part may be attempted even if it is not cost-effective if the part is absolutely required and is mission-critical to a system.

Reverse engineering of mechanical parts involves acquiring three-dimensional position data in the point cloud using laser scanners or computed tomography (CT). Representing geometry of the part in terms of surface points is the first step in creating parametric surface patches. A good polymesh is created from the point cloud using reverse engineering software. The cleaned-up polymesh, NURBS (Non-uniform rational B-spline) curves, or NURBS surfaces are exported to CAD packages for further refinement, analysis, and generation of cutter tool paths for CAM. Finally, the CAM produces the physical part.

It can be said that reverse engineering begins with the product and works through the design process in the opposite direction to arrive at a product definition statement (PDS). In doing so, it uncovers as much information as possible about the design ideas that were used to produce a particular product.

The following are the steps of the reverse engineering process:
Reverse Engineering Process

a. Prediction

  • What is the purpose of this product?
  • How does it work?
  • What market was it designed to appeal to?
  • List some of the design objectives for the product.
  • List some of the constraints that may have influenced the design.

b. Observation

  • How do you think it works?
  • How does it meet design objectives (overall)?
  • Why is it designed the way it is?

c. Disassemble

  • How does it work?
  • How is it made?
  • How many parts?
  • How many moving parts?
  • Any surprises?

d. Analyze

  • Carefully examine and analyze subsystems (i.e. structural, mechanical, and electrical) and develop annotated sketches that include measurements and notes on components, system design, safety, and controls.

e. Test

  • Carefully reassemble the product.
  • Operate the device and record observations about its performance in terms of functionality (operational and ergonomic) and projected durability.

f. Documentation

  • Inferred design goals
  • Inferred constraints
  • Design (functionality, form (geometry), and materials)
  • Schematic diagrams
  • Lists (materials, components, critical components, flaws, successes, etc.)
  • Identify any refinements that might enhance the product’s usefulness.
  • Upgrades and changes


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