Lecture Notes Design for Manufacturing and Assembly

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Lecture Notes Design for Manufacturing and Assembly

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Design for Manufacturing and Assembly

Unit 1: Introduction to Design

Design processes:

The engineering design process is a series of steps that engineers follow to come up with a solution to a problem. Many times the solution involves designing a product (like a machine or computer code) that meets certain criteria and/or accomplishes a certain task.

This process is different from the Steps of the Scientific Method, which you may be more familiar with. If your project involves making observations and doing experiments, you should probably follow the Scientific Method. If your project involves designing, building, and testing something, you should probably follow the Engineering Design Process. If you still are not sure which process to follow, you should read Comparing the Engineering Design Process and the Scientific Method.

The steps of the engineering design process are to:

Define the Problem
Do Background Research
Specify Requirements
Brainstorm Solutions
Choose the Best Solution
Do Development Work
Build a Prototype
Test and Redesign

Engineers do not always follow the engineering design process steps in order, one after another. It is very common to design something, test it, find a problem, and then go back to an earlier step to make a modification or change to your design. This way of working is called iteration, and it is likely that your process will do the same!

Design rules for manufacturability:

Design for manufacturability (DFM) is the process of proactively designing products to (1) optimize all the manufacturing functions: fabrication, assembly, test, procurement, shipping, delivery, service, and repair, and (2) assure the best cost, quality, reliability, regulatory compliance, safety, time-to-market, and customer satisfaction.

Concurrent Engineering is the practice of concurrently developing products and their manufacturing processes.

If existing processes are to be utilized, then the product must be design for these processes. If new processes are to be utilized, then the product and the process must be developed concurrently.

Source:

Dr. K Viswanath Allamraju. Professor
INSTITUTE OF AERONAUTICAL ENGINEERING
(AUTONOMOUS)
DUNDIGAL, HYDERABAD - 500 043