B-Pillar (Master Section Development)

DESIGN AND DEVELOPMENT OF THE B-PILLAR THROUGH MASTER SECTION DEVELOPMENT (INTERIOR TRIM)

AIM:

To design and develop B-Pillar from given Class’A’ surface and master section into a functional product design following the OEM design standards using CATIA V5 Surface workbench and Part Workbench following the injection moulding principles.

ABSTRACT:

Pillars are the vertical or near-vertical supports of a car's window area or greenhouse, designated respectively as the A, B, C, or (in larger cars) D-pillar, moving from front to rear, in profile view.

B Pillar is the central pillar of the car. It is the most complex component or structure of the vehicle body. This is because the front door attaches to the B pillar and the rear door hinges to the B pillar. The B Pillar is welded to the top panel of the car and the floor panel of the car. Hence B-Pillar provides structural support to the roof.

Steps followed while designing the B-Pillar.

1. Check for any defects or irregularities in the class-A surface.
2. Make a tooling axis.
3. Run the draft analysis beforehand in case if there are any faces that do not have drafts, those can be corrected by the class-A designer.
4. Understand the master-section.
5. Make the flange on both sides to make the aesthetic model complete.
6. Make class-B and class-C surfaces.
7. Make a surface model by trimming surface A, B, and C together.
8. Close the model.
9. Make a B-side feature.
10. Run draft analysis on the final model and make a report

ATTACHMENT FEATURES

The Attachment features are the Fixation and Location features that Fixes the components The Common Attachment features used in B Pillar Are

1. Doghouse with 4 Way Locator
2. Ribs

DESIGN RULES FOR DOG HOUSE:

1. Minimum height: Less than 6mm causes steel condition.
2. 3:1 ratio of steel width to height. But 2:1 is preferred.
3. Minimum width: 3:1 ratio of steel width to height. But 2:1 is preferred.
4. Draft: minimum 1.5deg.
5. Sink saver: height (C) = 40% of nominal thickness.
6. Width (B) = 3.0mm-6.0mm.

Distance between ribs should be 50mm.