Skip to end of metadata
Go to start of metadata
You are viewing an old version of this page. View the current version.
Compare with Current
View Page History
Version 1
Next »
Goals
- Discuss plan for manufacturing Drivetrain
- DFM tips/standards we want to agree on?
Update & Action Items
New Tasks
General Notes
Demtool info...
- Standard tolerances for machining are +/- 0.005"
- Inside bend radii should be equal to or larger than the material thickness being
used - The simplified formula dictating the shortest flange length is 4x the material
thickness from the bend line - When designing hole locations on sheet metal, use the above 4x material thickness
from bend line rule - Holes are best drawn at mid-tolerance. This means the mid point between the range of acceptable deviation
- Holes intended for tapping in up to 1/2” thick steel should be drawn at the exact tap drill size
- Protocase tips! → Note: they have tables outlining compatible tolerances, materials, etc. following up on all of these tips
- Self-sinching fasteners need to be harder than the material they are being inserted into
- Generally, 400-series stainless steel are good
- They have PEM nuts, standoffs, and studs :O
- The larger the internal radii, the faster the machine can cut
- Make internal radii as large as the design can allow, or reference Protocase's minimum radius table
- Chamfers > fillets for external corners/edges
- In general, don't make tight tolerance where not needed
- For tapped holes, drilled hole length will equal the desired thread depth + length of tap's taper + some additional thread allowance. Keep in mind.
- Going for a smaller thread depth decreases costs
- 6061 aluminum is best if the part needs to be machined. 5052 for sheet and plate metal as it is the strongest of the non-heat-treatable alloys
- To check out: