1. Recommendations for CERN drawings EDMS 1435380
Dimensioning for repeated features
Coordinate tables for hole patterns
Dimensions on projected edges
Multi-sheets
Dimensions with centered tolerance
Hole positioning
Numbering of Welds
Engraving on a part or item
ISO Norms sticker
Introduction slide
Catia / SmarTeam Forum 2014/12/04

2. 1. Dimensioning for repeated features
3T facilities
Founded in 1999
- Use «Detail» tool
- No detail of detail !
Catia / SmarTeam Forum 2014/12/04

3. 2. Coordinate tables for hole patterns
Traditional dimensioning
With “Hole Dimension table tool” (See FAQ here)
Position
dimension
Mostly permitted for water-jet/laser cutting
=> 3D model to be used by manufacturer
Don’t forget to use a general tolerancing
Be careful: the dimension table is not associative with the 3D model
Catia / SmarTeam Forum 2014/12/04

4. 3. Dimensions on projected edges
Or ?
Ex 1
Ex 2
Be as clear as possible
=> show projection lines!
Add them manually
(see FAQ here)
0.25mm, Dot-Dashed
Use «Detail» tool if needed
Catia / SmarTeam Forum 2014/12/04

5. Catia / SmarTeam Forum 2014/12/04
4. Multi-sheets
Same sticker on all the sheets (see FAQ here)
Part list must be only on the main sheet
Every sheet has a unique CDD number
Different sheet sizes allowed but the biggest one should be for the main sheet
Drawings storage: see FAQ here
This component is described by ‘’x’’ associated drawings :
- 1/x : ABCDEFGH0001 (main sheet)
- 2/x : ABCDEFGH …
- y/x : ABCDEFGH0ZZZ
Sticker
Catia / SmarTeam Forum 2014/12/04

6. 5. Dimensions with centered tolerance
Easy to implement on Ø
Future => 3D models extracted with nominal dimensions
Useful on lengths: Improve understanding when stacking components in assembly
Ex 1 No
Yes
Ex 2
Yes No
5:1
5:1
Catia / SmarTeam Forum 2014/12/04

7. Catia / SmarTeam Forum 2014/12/04
6. Holes positioning !!
Yes No
Avoid using tacit symmetry
Dimension component based on references
which reflect the functionality.
Use as often as possible theoretically
exact dimensions linked to the references
Yes
Catia / SmarTeam Forum 2014/12/04

8. 7. Numbering of welds (for pressure equipment)
If needed, create an additional drawing dedicated to numbering of welds
Standard manufacturing drawing
Number each welding as: W010
- Create and store this new
drawing as a multi-sheet
(Welding)
Incremente numbers wrt 010, 020, 030….
Catia / SmarTeam Forum 2014/12/04

9. 8. Engraving on a part or itemNo
Good
- Be clear what and where to engrave
- For more info (asset ref), refer to another document (ex EDMS)
- Don’t engrave on 3D models
Catia / SmarTeam Forum 2014/12/04

10. Catia / SmarTeam Forum 2014/12/04
9. ISO norms sticker
Don’t forget it!
(See FAQ here)
- You can nevertheless use most recent ISO GPS Norms!
Contact us to be sure
Mention clearly the Norms you need to refer to
- According to how many requests we’ll receive, we could consider a dedicated training on most recent GPS ISO Norms !
Example:
(ISO 1101:2012)
Catia / SmarTeam Forum 2014/12/04

11. Recommendations for CERN drawings EDMS 1435380
Respect ISO Norms more than ever
Be rigourous especially when needed
Dimension to avoid any ambiguity and misunderstanding
Ask us when you need Contact us:
GrACQ on the web here
Catia / SmarTeam Forum 2014/12/04