Product Design Lecture Notes PDF

School of Mechanical Engineering Course Code: Course Name: Engineering Design and Prototyping Introduction to Product Design Mechanical Design Division Program Name: B.Tech First Year ...

School of Mechanical Engineering Course Code: Course Name: Engineering Design and Prototyping Introduction to Product Design Mechanical Design Division Program Name: B.Tech First Year  Objectives To acquire knowledge about: Concept of Product Design Computer assisted modeling of solid components.  Product Design Deals with the conversion of ideas into reality in the form of product. Aims to fulfill human needs Product development is set of activities beginning with the perception of market opportunity and ending in the production , sale and delivery of product  Design by innovation Innovative design is an organized, systematized and logical approach for solving a design problem. There are two design methods for innovative design. Design by creative design route Engineering Design Innovation comes from new ideas that is not existing. Such design keep changing through the process of continuous evolution according to the market needs.  Design by evolution In the past designs used to evolve over long spans of time Today, pace of technological changes reduced the risk of making major errors. This circumstances rarely demanded analytical capabilities of designer. This was design of evolution. Design by evolution Design by evolution Design by evolution Design by evolution Morphology and process of Design Engineering Graphics In Design Process  Engineering Graphics In Design Process Problem Definition Visualize Exploration of Ideas Sketches Design Geometric Analysis model Refinement and Optimization Detail drawings & 3D model Implementation  Drawing /Graphics vs. Engineering Drawing/Graphics Drawing ❖Describing any object/ information diagrammatically ❖Graphical representation of an object Engineering Drawing ❖Graphical means of expression of technical details without the barrier of a language. ❖Universal language for engineers ❖A drawing of an object that contains all information like actual shape, accurate size, manufacturing methods, etc., required for its construction. ❖No construction/manufacturing of any (man -made) engineering objects is possible without engineering drawing.  Units of Measure International systems of units (SI) – which is based on the meter. Millimeter (mm) - The common SI unit of measure on engineering drawing. Individual identification of linear units is not required if all dimensions on a drawing are in the same unit (mm). The drawing shall however contain a note: ALL DIMENSIONS ARE IN MM. (Bottom left corner outside the title box) ALL DIMENSIONS ARE IN MM  Drawing Standards ❑Drawing standards are set of rules that govern how technical drawings are represented ❑Drawing standards are used so that drawings convey the same meaning to everyone who reads them. Standard Code  Computer Assisted Engineering Drawing CAD or computer-aided design and drafting (CADD), is technology for design and technical documentation, which replaces manual drafting with an automated process. Engineering Design Models Engineering Design Models Engineering Design Models  Manual Drawing Vs Computer Assisted drawing Data storage and Accessibility 3D Cad Models Revision Accuracy Speed and Time Better Quality designs  Manual Drawing Vs Computer Assisted drawing Data Storage and Accessibility: CAD Drafting: CAD software allows for easy storage and organization of design files electronically. These files can be saved on local drives or cloud storage, making them readily accessible from anywhere with an internet connection. Manual Drawing: Manual drawings are typically physical copies, which can take up physical storage space. Accessing them remotely or sharing them with others can be cumbersome, often requiring scanning or mailing. 3D CAD Models: CAD Drafting: CAD software excels in creating complex 3D models. It allows for precise manipulation and visualization of 3D objects, making it ideal for architectural and engineering designs. Manual Drawing: Manual drawing is primarily a 2D medium. Creating accurate 3D representations is challenging and time-consuming compared to CAD. Accuracy: CAD Drafting: CAD drafting is known for its high degree of accuracy. Measurements are exact, and mathematical calculations can be embedded in the design, reducing errors. Manual Drawing: Manual drawing accuracy depends on the artist's skill and tools. Human error, scaling issues, and misalignment can occur more easily.  Manual Drawing Vs Computer Assisted drawing Speed and Time: CAD Drafting: CAD drafting is generally faster for creating, editing, and revising designs, especially for complex projects. It allows for efficient reuse of components and automation of repetitive tasks. Manual Drawing: Manual drawing is often more time-consuming, especially for intricate or large-scale projects. Precision and detailing take longer to achieve. Better Quality Designs: CAD Drafting: CAD can produce highly detailed and consistent designs. It excels in maintaining design standards and reducing errors, resulting in better quality designs, especially for projects that require precision and complexity. Manual Drawing: Manual drawings can still produce high-quality designs, particularly for artistic or conceptual purposes. However, maintaining consistency and precision may be more challenging.  Summary An engineering drawing helps to convey ideas and convert concepts into reality An engineering drawing follows criteria and conventions to eliminate confusion by the standardization of nomenclature and practices, as a way to clearly relay the information to the individual who understands it when it is read, and very importantly, it indicates or hints how something is going to be manufactured. Modeling techniques such as CAD gives a visual representation of a physical component in a three dimensional form.  Questions ❖How do you explain engineering drawings? ❖Discuss the need of computational techniques to design a physical component?  References o Engineering Drawing by N. D. Bhatt and V. M. Panchal o Engineering Graphics by K. C. John o NPTEL Thank You