Design for Prototyping
Introduction
What is a Design?
A design is an iterative process to find a solution to a defined problem falling under certain constraints.
- 3D models
- 2D Drawings
How do you Design Something?
- Design Methodology
- Concept Sketching
- CAD Modelling Rhino Solidworks Fusion 360
- Rapid Prototyping
How to arrive at Design Intent
- What are the requirements?
- What are the operating conditions?
- What Material can be used?
- How strong does it need to be?
- What is the Cost?
- How can it be made?
- Design a Tea Kettle
What is Design for Manufacturing?
- It is the process of adapting a Design to suit available manufacturing technologies.
- Wooden House with Hammer and Saw Vs CNC Machines
- Box various Designs
- Table Wood Metal Origami
- Chair CNC Cardboard ZUND
- Jet Engine Blades
- 3D printed Rocket
Design Rules
3D printing
3D printing TEchnologies Additive Manufacturing
FDM 3D printing
Possibilities STL Simplify 3D print material guide Constrains Supports Layer Orientation Eg- Shafts Overhang Clearance Print Angle Cantilever Bridging Layer Orientation Anisotropy Infill Density Vertical Holes Design Rules for 3D printing 3D Benchy Calibrate
Laser cutting
Possibilites Flexures dxf Materials Constrains Kerf Kerf gig Test Comb Taper
CNC Milling
Possibilities Open Desk Endmills Kerf gig Constrains Stepover Inside corner Dog bone Tooling
Reverse Engineering -3D Scanning
Artec Leo
Cost of Product Design
- Materials
Material Selection for CNC machining Common material properties and selection guide. Matweb material properties information Engineering Material Classification Materiom Organic Material database
- Manufacturing Processes
The type of manufacturing processes influences the design of the product Various Manufacturing Processes Animated
- Tolerance
- Geometry
Standard sizes [Plywood/Plastics/]Drills/Endmills] Stock [Bar/Sheet] Part Features [Fillet/undercuttings/Thin parts] Tooling [Fixtures/ Custom Tooling]
Choosing Manufacturing processes Cost vs Performance
- Additive vs Subtractive Cost per part
Job Shops
Resources
- History of CNC machines
- The secret life of components Tim Hunkin
- Building Prototypes Dan Gelbart
- CS235 Applied Robotics Design
- Fundamentals of Design Slocum