1. MME2259 Design Documentation Going to Manufacture
Prepared by: Chris Vandelaar

2. Going to Manufacture Design finalization Drawings: Contents – Overview
Drawings and Drawing packages
Working with University Machine Services (UMS)

3. What makes a design final?

4. Design is finished when:
You have consensus…..
Majority of stakeholders agree

5. Design is finished when:
CAD models are complete
Include:
Fasteners,
Electromechanical components:
Motors,
Actuators,
Power supplies,
Limit switches,
Etc…

6. Design is finished when:
Method of fastening chosen
for all connections
Permanent -Welded
Temporary/removable - screw
Tamper resistant
Cost effective – weld, rivet or tape

7. DFM done for all parts
Can it be manufactured?
Cost effectively?

8. Virtual Assembly Parts – check clearances, alignments
Fasteners – include tool access
Bottom up assembly?

12. Fasteners Ensure maximum material conditions for threaded holes
Maximum thread engagement
Proper chamfers on threaded holes
prevents thread damage

14. Round Table Simplification
Saw cuts instead of mill finishes
Chamfers instead of arcs
Rivets or welds instead of screws
WARNING – expect it won’t work
It may need to come apart
It is a prototype…

15. Review: Consensus CAD model is complete Methods of fastening DFM
Virtual Assembly
Round table simplification

16. Manufacturing Documents
What is the purpose of your product?
Is it a prototype?
Function – will your idea work?
Finish – how will it look and feel?
Testing new techniques – can I make it this way?
Destructive – what is it’s breaking point?
Final product – One off
All are major factors in your products manufacture and influence cost significantly

17. Manufacturing documentation
What kind of drawings do you need for prototyping?
None:
You’re making it yourself
Sketches/Rough Drawings:
– You’re working with a partner close by that you trust and know – familiar
Full documentation:
You don’t know who is making it?

18. Sketches

19. Manufacturing documentation
What kind of drawings do you need for production?
Sketches/Rough Drawings:
– You’re working with a partner close by that you trust and know – familiar
Full documentation:
You don’t know who is making it?
It’s being made overseas or far away
In a place where a different language is spoken
Drawing standards ensure clear communication around the world

20. Full drawings are time consuming

21. Drawings Purpose of drawings:
Convey all information required to get what you asked for:
Parts
Important
Estimate the cost of manufacturing the parts
Equally important!

22. Drawings and Drawing Packages
Assembly Drawings
Sub-Assembly Drawings
Part Drawings
Support Documentation

23. Assembly Drawings: Include
At least one view of assembly
BOM
List top level parts only – Sub assemblies, big ticket components
Notes
common detail occurring throughout the entire assembly
I.e.: All fasteners to be 416 stainless steel
Overall dimensions
Shows space requirements
Overall Mass (estimated)
Shows potential shipping requirements/budget

25. Sub-Assembly Drawings: Include
At least one view of the Sub Assembly
BOM
List all components and sub-assemblies. Including fasteners
Notes
Special assembly instruction or sequence information
All details common throughout sub-assembly
All ferrous metal parts must be demagnetized fully
Overall dimensions and Mass
Shows space and handling requirements

27. Part Drawings: Include
Part geometry
GD&T

29. Part Drawings: Include
Part geometry
GD&T
Basic tolerances are
plus / minus
the dimension given
Hole too small + shaft too big (all within basic tolerance)
= REWORK = EXTRA COSTS!!!
Tolerances matter!

30. Part Drawings: Include
Part geometry
GD&T
Notes - specific to the part
Finish
I.e. All edges to be chamfered ” unless specified
Surface treatment
I.e. part to be chemically treated with Black Oxide coating

32. Drawing example

34. Support Documentation: Includes
Data Sheets – for purchased components. Available from most component manufacturers
Supplier Data – Suggest potential sources for purchased components
Set up documentation – for proven techniques and processes used in the manufacture of specific components or assemblies
Not generally seen in prototyping
ONLY GIVE PERTINENT INFORMATION
NO DUPLICATION

35. Presentation of drawing packages:
Order
Main Assembly Drawing with BOM
Main Assembly Detail Drawings
Sub-Assembly Drawings
Sub-Assembly Detail Drawings
Individual Part Drawings belonging to the sub-assembly – repeat if needed
Support Documentation

36. Presentation of drawing packages:
Continued….
Ease of access to important information
Folded so title block is on top
Gives access to part numbers, material type, quantities, etc.
Supply contact information
Manufacturer/Estimator may have questions

38. Working with UMS Resources Materials sourcing – common to obscure
Outsourcing support
Standard component catalogue library
100+ years in prototyping and technical expertise

39. What you need to Work with UMS
Help – The faculty supports UMS to help Undergraduate students gain actual industry standard experience at no cost to you
An idea – UMS can provide discrete design support
A problem – UMS can provide complete solutions – Not free ~$73.00/hr
A full design – UMS offers in house machining and Fabricating

40. What to expect as Undergraduate students
Consultation if needed
Design/Drawing review
Workshop training
Estimating of project costs with explanation of where costs are incurred
Suggested cost reducing measures
Call come in or us to set a meeting

41. UMS Costs Consulting = No cost to Undergraduate Students
Basic Shop Rate = $63.00/hr
Technical staff
Machine rates: (approximate)
CNC Machining Center = $15.00/hr + operator = $70/hr - $15/hr if unattended run is possible
FDM ≈ $40 / cubic inch – very approximate – always get proper quote – depends on build
All other equipment is covered under basic shop rate

42. Where is UMS? Thompson Engineering Building. Room 50
University of Western Ontario
1151 Richmond Street
London Ontario Canada N6A 5B9
Phone (519)
Fax (519)

43. Resources:
Resources: Interpreting Engineering Drawings 3rd edition by Jensen & Hines
The Free Dictionary –
Aiolos Engineering – Toronto Ontario Canada

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