Warpage analysis visualisation

[Anonymous]

Hello,

can anybody from you help to visualize the warpage analysis in the best possible way. How will anchor points work for a part which is very complex design. By complex I meant not on a single plane, consist of many free form surfaces and so. We are trying to compare the warpage from Insight to the actual scan part. We are using CT Scanning for this and will then generate .stl file out of it. Just want to try how reliable can be the warpage analysis. Thanks

Regards

Samkit

[PascalGosset]

Hello Sam,

Effectively, the anchor points are not sufficient to study the warpage of complex parts.

Instead, you must use the Boundary Conditions.

I propose you to do like this:

• Make a first simulation with all the real information you have
• Determine the shrinkage by analyzing the warpage results
• Apply the opposite shrinkage to your model
• Launch a second filling and packing simulation
• Use “Boundary Conditions / Constrains & Loads “ to block the nodes used for the scan
• Select nodes. Fix them versus X, Y or Z. Specify : “Use constraints in : Warp Analysis”
• (Generally, these references are defined in the plan of the part).
• Launch the warp analysis and compare the results.

If Moldflow shows one of the references is in a deformed area, you should change it and launch another Warp analysis.

There are softwares permitting to compare a meshing with a CAD model.

You can use them to compare the deformations of scans and simulations.

In this case, you don’t have to add warpage boundary conditions to your model.

Good luck.

[Anonymous]

Thank you very much Pascal. We are currently trying the method/procedure which you stated. I hope it works.

to your Statement about the Softwares that help to compare the mesh and CAD Model, we tried to Export the warpage Analysis as stl and compare the CAD in GOM Professional Software, but the results don't match anywhere. The deviations are too large to be realised.

I hope after the results from your procedure, we can think of something more realistic. Thanks and have a nice day

Samkit

[ikv]

Hi Samkit,

as you mention that the "results don´t match anywhere" - have you performed your simulations on a model of the final CAD-geometry of the part or on a model of the increased mold dimensions (considering a shrinkage factor applied to the part geometry)? If you used the CAD geometry of your final desired part dimensions, this would explain that the results do not match at all.

Thomas