Week - 4 - 2D meshing for Plastic components

Aim: To perform the Mid Surfacing and meshing of Plastic Bottle Cap model.

Procedure:

This is the actual componant. The yellow line indicates the double cons and dots indicates the hot points on the componant. Now firstly geometry of this componant has to be checked and fix the error which are found. Checks>Geometry

The errors are fixed with auto fix option. Now its okay to perform various operation on the componant.
Now to perform the midsurfacing the thicknes of the various part of the componant. And then perform midsurfacing operation.
For thickness Utilities>Measure.

Now the midsurfacing is to be done. For the midsufacing various operation is used suc as Faces>Mid.Surface / Middle / Offset .
And the midsurfacing is done.

Some of midurfacing are shown below:

For this used Face>middle(multi) and selecred the red, green and blue surface accordingly.

Now after clicking middle mouse button the mid surface is formed with delepted parent and child surface.

Now to regenerate the all surface select Faces>Undelete and select the all the border and press middle mouse click.

And the final surface will look like this. So you can do the same process for other element.

There are some part which are same and need to rotate on same plane so for that first creat a 2 COG with different hights. The process is Points>ON COG select first circle and middle mouse button then perform the same process with other circle ar some different hight.

After creating COG select Transform>Copy. Then select the entity which has to be rotated. Select rotate operation then for put total number of entities need to be paste on the surface. Then at X box select the first COG created and at dX select the second COG add angle and perform the operation.

And it will look like this :

After completing all the miduraface and applyind thickness to every part final Midsurfacing of the CAP will look like this. For PID select the faces> new PID. Select the midsurface which you want to add properties. Add thickness, colour and other property required. As shown below:

Final:

Now the next is meshing, for that go to the module and select mesh. So before creating mesh check the geometry and fix the error if needed. Then select the length of the meshing for that go to the Perimeter> length. Select perimeters and give the length accordingly.

Now after length operation is done give the quality criteria as per the requirement. For that select the Utilities>Quality Criteria. And then add given value as given:

After done perform the meshing operation from Mesh generation>Best and select the surface on which you want to perform meshing opertion. After performing meshing there wil be some of element which can be corrected using some operation as Shell mesh> recosntruct / smooth / improve . The off element can be corrected with the help of reconstruct operation in the following way:

The final meshing on all the surface look like this:

After switching on the shadow mode and and giving thickness from the Presention Parameters selecting shell the final componant is look like this.

Learning Outcomes:

• Able to fix the geometrical errors.
• Got used to different type of midsurfacing.
• Performed the middle of curve operation.
• Got used to various type of face creation operation.
• Used the COG operation to copy the componants.
• Got the knowledge of Solid Shell.

Outcomes:

The midsuracing and the meshing of the given plastic bottle CAP is done successfully. There are no OFF elements. The quality criteria is checked as per the given requirement. The meshing is done smooth as much as possible.