Week 10 - Challenge 3 - Door Trim Lower with Engineering Features
Objective: The main aim of this challenge is to create a solid body of 'Door Trim Lower' with the help of the closed surface method by using the 'Generative shape design' workbench in CATIA V5. Performing the 'Draft Analysis' on the solid part body of the Door trim.
Overview:
Initially, we need to offset the given Door Trim class A surface in the inner direction to the required thickness (here the thickness is 2.5mm). After that, we need to close the patches on the offset surface of the door trim, the patches are formed due to the fillets on the Class A surface. Once all the patches are closed properly join them together to make a proper class B surface and now sweep the boundary of the class A surface to trim with the class B surface to make a closed body. By using the closed body command in the Prat workbench we can get the solid body from the closed surface of the Door Trim. Now, I created the Heat stakes and Locators by considering all the design parameters. After creating all the B-side features on the solid part body of the door trim, I performed a draft analysis for it to check whether all the surfaces are drafted properly or not (The draft angle for the plastic component is 0.5deg to 3deg).
TOOLING AXIS:
To create the tooling axis, I extracted a surface from class A and created a point in the middle of the surface by using the point command and created a line at that point through the y-axis. Now, I performed a draft analysis check from that line whether the created tooling axis is in the correct position or not. If in the draft, analysis checks the surface highlighted with green color on both sides of the surface the tooling axis is in the correct position and direction.
CLASS B SURFACE:
To create the class B surface, offset the class A surface inside as per our thickness requirement (here the thickness is 2.5mm, so I offset the class A to 2.5mm inside). Once the offset is created, we can observe some patches on the offset surface by taking the boundary for the offset surface, those patches are formed due to the fillets on the class A surface. We need to cover those patches with the help of the multi-section surfaces command by extracting the patch boundaries. Once all the patches on the offset are covered properly join all the patches with the offset surface, to get the replicated surface of the class A surface.
CLASS B SURFACE CREATION
CLASS C SURFACE:
I used the sweep command to create the class C surface concerning the boundary of the class A surface. Initially, I extracted the boundary of the class A surface with tangent continuity, and I sweep the extracted boundary concerning the surface at 93deg (for draft angle) for 6mm to intersect properly with the class B surface. Once we sweep all the surface boundaries of class A, extrapolate the sweep surfaces until both surfaces got intersect properly, and trim them to remove extended extrapolated surfaces to get a proper sweep boundary throughout the entire surface, including the center hole of the door trim. Now, join both class A and sweep the boundary to get the complete class C surface.
Class C surface:
PART BODY:
To create the solid part body from the closed surface, I used the closed surface command in the part workbench.
CREATION OF LOCATORS:
- 4 WAY LOCATORS
CREATION OF HEAT STAKES:
Now I translated the heat stakes by copy-pasting them in the part body according to the requirement.
DRAFT ANALYSIS FOR PART BODY
SOME SURFACES ARE NOT CLEAR BECAUSE I TRIED LOTS OF TIMES BUT IT IS NOT CLEARED IF IT IS WRONG THEN SUGGEST ANY IDEA HOW IT IS CLEARED
Different views:
Isometric view:
Front view:
Back view:
Left side view:
Right side view:
Top view:
Bottom view:
