Week 10 - Challenge 2- Attachment Feature Creation (Dog House)

TITLE:- To create the Door Trim with attachement features (Dod House) considering the design rules. Consider the thickness of the part to be 2.5 mm.

AIM :- To create the Door Trim with attachement features through the given class-A surface and perform the draft analysis on final component and Class A surface.

OBJECTIVES :-

• Creation of tooling axis for given class – A Surface.
• Creation of Class B and Class C surface
• Perform Draft analysis for given class A and final component.
• Create side core axis for dog house and perform draft analysis.

TOOL USED :- CATIA V5

Introduction :- In this project we are designing a Door Trim with attachement feature(DOG HOUSE) using given class A surface. The approach includes creation of tooling axis , Class B surface and Class C surface keeping the given thickness 2.5 mm.

CLASS A SURFACE:- Following surface is given as the input for the component creation.

To continue design first we need to create a tooling axis for class A surface.

Draft Analysis for class A surface :-

All the draft angles are more than 3 degrees in draft analysis.

Creation of Tooling Axis:-

• Look all the three directions which best suit for tooling direction.
• In complex surfaces,we simply select the one of three planes or select the flat surface.
• Create a point and draw a line in selected direction for tooling.
• This is the final axis for tooling.

Creation of Class B surface:-

• Directly offset the Class A surface with the given thickness value.
• Offset surface will not be proper there will be many patches in the surface.
• We have to fill the patches in offset suraface using different commands like BOUNDARY,EXTRAPOLATE,MULTISECTION SURFACE etc.
• After filling the patches join the B-surfaces.

Creation of Class C surface :-

• Create boundary of class A surface and use sweep command to create the surface with 3 degree draft angle.
• If the C surfaces are not properly joined then extrapolate them and trim it.

FINAL TRIMS :-

CLASS C SURFACE + CLASS A SURFACE

• Finally trim the joined surface with class B surface to get the final surface body of component.

PART BODY :-

• Use the close surface command in part workbench to change the surface body into closed surface to get the final component.

Creation of DOG HOUSE:-

• Extract a surface from class A and create a point on that surface.
• create a plane on that surface and create a sketch for dog house.
• Extrude the sketch and use the thick surface command to get the solid body.
• Give the draft to outer surfaces according to the design rules.
• Now create side core axis for inside surfaces and give draft using this side core axis.
• Now using boolean operation add or assemble the dog with main component.

DRAFT ANALYSIS OF FINAL COMPONENT:-

DRAFT ANALYSIS OF DOG HOUSE FEATURE:-

• For outside faces draft angle is 1.5 deg using main tooling axis.
• For inside faces use the side core axis for draft.

Draft analysis for outside surfaces of dog house:-

• All faces clears the 1.45 deg draft.

Draft analysis for inside faces od dog house:-

• Inside faces of dog house has 0.5deg draft angle using side core axis.