Week 9 - Project - Master Section Development

MASTER SECTION DEVELOPMENT

Aim:-

• To design B pillar with the help of given master section to follow the design criteria and thickness and develop closed body.

Master section:-

• Master section are the guide for design requirement which decides the component packaging after technical surfaces. following the general workflow that is followed for the design and development of interior and exterior automotive trims in OEMs.

Procedure:-

1) After importing the model into catia ,check the given Class A surface for geometry error or if the faces are missing ,create a new face with the multisection tool available in catia and patch it.

2) In order to provide the draft for the entire component. tooling axis has to be created for the core and cavity to be design in the later stage.

3) For the given master section, create the tooling axis with the bisecting line option available in the tool line.

4) After that we created the B surface which has to be created 2mm from thr class A surface , which has to be an exact replica of the class A surface provided, and also flange has to be created on either end of the surface A and as well as B surface with referance from the mastersection given.

5) The general step followed in creating a surface is by extracting the surface without fillets,untrim,and extrapolate the extracted Class A surface if needed and offset the surface to the part thickness given ,after that trim or split surface according to shape.

6) After B surface generated ,C surface has to be develop in the Class A surface using sweep toolbar without any generic change ,and minimum draft angle provides 3 degree. all the draft provided to the component at outside of the part.

7) After C surface created all along the boundary A, join and trim it all togrther to make it single surface.

8)Now class A and class C has to be trimmed to form as single surface and thereafter trim it with above B surface in order to get the B pillar part.

9)Then we closed the body operation.

DOG HOUSE WITH LOCATOR AND RIB CREATION:-

1) For the rib and dog house ,proper design rule has been followed.

• Maximum height :Less than 6mm.
• 3:1ratio steel width to height,but 2:1 is preferred.
• Draft:1.5 deg.
• Optimal radius:25mm.
• Avoid sink mark:Height=40% of nominal thickness ,width=3.0mm-6.0mm.

2) After developing dog house ,inside part draft with main tooling axis, so that a side core axis has to be created and separated draft has to be given to interior of dog house.with applying proper chamfer ,fillet radius ,locator can be cfreated sucessfully.

3) Draft analysis:-

Conclusion:- B pillar develop by the reference of master section given.