Week 10 - Challenge 2- Attachment Feature Creation (Dog House)
DOOR TRIM EXERCISE.
PART TREE.
TOOLING AXIS.
Class-A surface is first analyzed to create the tooling axis. where the molds pull apart in injection molding. Tooling direction is essential for plastic product design as it decides the direction for mold separation.
To create the tooling axis first we have to check the best suitable direction for tooling by using the compass. the y direction is suitable for creating the tooling axis because in the y direction most of the surfaces are clearing while performing draft analysis. Generally tooling axis is created using bisecting line method but here A line normal to the surface is created in the y direction and considered the tooling axis.
Y direction .
SIDE CORE AXIS.
Side core axis is created in the x direction on the same point as the main tooling direction created.
CLASS A SURFACE.
CLASS B SURFACE.
In this component Creation of the class B surface first, we have to offset the entire model by 2.5mm outward some of the surfaces give offset error and ask for offset without these subelements click okay and work on the incomplete surfaces by using the multi-section surface command, sweep and different commands used to complete the class B surface.
CLASS C SURFACE.
We first extract the edges from the Class A surface with the help of the multi extract or boundary command which we create the path for a sweep for class C , we have to create all separate sweeps and join them together. once all the sweeps are joined together we created a class c surface.
JOINING OF CLASS A B C SURFAC.
FINAL PLASTIC.
Trim the class-B surface to join (A+C) this will make sure that we get a closed surface. We can check it using the boundary tool, if it gives an error that means that the component is closed.
DOG HOUSE.
Dog house: Dog house is an engineering feature used in the plastic trim design. Dog houses are used as supporting features. Sometimes other engineering features like snaps; locators, etc. are mounded on them to increase their strength. Dog house and other engineering Features are built on B-surface.
Design rules for Dog house creation
"C" is where the doghouse contacts the backside of the surface
Doghouse wall thickness at the intersection of the part wall ( C ) should be 40% or less than the main wall stock ( T ).
The height of ( B ) should be between 3.0 – 6.0 mm
DOG HOUSE SKECTH.
Here, one sketch only created.
DOG HOUSE.
For second dog house the solid of dog house translated by coordinate translating option.
DRAFT ANALYSIS.
- The part created has to be changed to the material mode in the display frame.
- Compass is enabled and aligns it along with the tooling direction.
- The lock command is then applied to fix the compass along with the tooling axis.
- Color codes are classified and Draft angle is applied.
- Running point analysis is used to display permissible draft angles.
ISOMETRIC VIEW.
FRONT VIEW.
SIDE VIEW.
TOP VIEW.
