Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Modularity in Product Design

No description

Sandy Lum

on 26 August 2011

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Modularity in Product Design

Modularity Guidelines for Modular Design Handy Mechanisms in Modular Systems Sample Concepts Use a top-down approach when establishing an architecture to define modules Assure the CAD is reflective of the system's modularity Standardize module connection points Keep balanced with the integrated design approach Keep subassemblies as simplified as possible Extruded cuts as guides for swappable modules Keyhole slots Slots with marked points "Toothed" fastening Latches Quick-release clamps Evaluating modularity in modules of a mechanical system Time to assemble = t_a Time to disssemble = t_d Number of tools required = q Total # of components in path = n Total number of components in system = m As features do not tend to "multi-task", or exist for more than function, modular systems tend to have more parts due to this 1-1 mapping of functions to components. Start with a top-level assembly and keep working down to create subassemblies. Once a subassembly has a 1-1 mapping to a function, it is a module. While modularity is great for upgradability, variety, and maintainability, integrated designs tend to result in better-performing products. Keep a fair balance. DFA keeps modules easily swappable, and minimizes interactions between separate modules. This allows for easy switching between robot configurations. Try: Minimize the use of fasteners, especially those which are threaded. Use self-fastening features where possble. Try: Use a component with a large mass and low CoG as a base from which other assemblies attach. It should clearly indicate where modules may go. Try: Limit maximum dimensions of modules so that any robot configuration will not have interference issues Try: Use features (such as CNC'ed edges) to make modules self-aligning and self-locating where possible. Try: Use features that make modules impossible to install incorrectly. This allows for no-fuss swapping of modules. Establish interactions from the start, and negotiate space requirements. Try: Referring to DFA guidelines. Tips such as standard fasteners distanced by a standard length are applicible in this case. Modularity in CAD provides the ability to check for interactions and/or interferences before physical prototypes are produced. Modular CAD can also easily show different configurations of the robot. Retrieved from: http://www.purdue.edu/discoverypark/PLM/SME/Top_Down_Modeling.pdf Structure parts into independent modular assemblies.

These parts can then assemble into the full product assembly, in any configuration. 1. Create a skeleton model according to the established architecture. This will be the full product assembly. 2. Use critical geometrical constraints to create parameters and expressions. This will result in a skeleton model that reflects the critical orientation and position relationships between all modules. 3. Assemble all subassemblies into the skeleton model (ie the top-level assembly). Try a formal method of defining modules Design for assembly (DFA) Keeps modules easily swappable and minimizes interactions between modules so that different robot configurations can be achieved. TRY: Minimize the use of fasteners, especially those which are threaded. Use self-fastening features where possible. This allows for a clear, easy method of attaching/detaching modules. TRY: Use a component with a large mass and low CoG as the base from which other assemblies attach. It should clearly indicate where each module goes. TRY: Limit maximum dimensions of each module so that they don't interfere with each other, no matter what configuration. TRY: Use features such as CNC'ed guides to make modules self-aligning and self-locating/ TRY: Use features that make modules impossible to install incorrectly. Gu, Hashemian, and Sosale from University of Saskatchewan propose a method in their paper "An Integrated Modular Design Methodology for Life-Cycle Engineering": Grab catches Establishing architecture Standardizing all possible module connections to the base Having a base from which modules attach Replace the 2011 kickers' restraints with quick-release clamps DFA: Reduce number of components in the path to any module Keyhole slots allow different modules be easily swapped in A systems concept in which a product is the result of a combined configuration of subassemblies, or modules. Sandy's Modularity Ranking Tool
= SMRT = (t_a + t_d) * (1 + n/m) + q 1 2 3 5 4
Full transcript