Week 9 - Attachment Feature Creation (Ribs & Screw Boss) - Challenge 1

AIM

    To make a full solid model from the provided lower door trim A surface and make ribs & screw boss.

INTRODUCTION:

CATIA:

         It means Computer-Aided Three-Dimensional Interactive Application.  It is computer aided designing software. This is software which is used to design 3D models with different workbenches.

   CLASS A SURFACE:

                 It is surface which is made by the designer. It is aesthetic surface and usable outside futures are on this surface.

  CLASS B SURFACE:

              It is bottom side surface of class A surface. It is made by class A surface. It is formed with thickness distance from class A surface.

  CLASS C SURFACE:

           It joins the both class A and class B surfaces. This surface is equal to the thickness of the component.

TOOLING AXIS:

• Class A surface or part is used to manually analysis which is best for tooling and create the axis perpendicular to the product. It is called tooling axis. Mould is open and closed by this axis.

METHODOLOGY:

    MAIN PART:

TOOLS:

1. Extract:

       This comment is used to create the required surface again. Which means copy the surface again for next operations.

2. Un trim:

      This tool is used to un trim the surface which means create the full surface of previous surface from current surface.

3. Trim:

      This tool is used to cut and eliminate the unwanted surface.

4. Extrapolated:

       This tool is used to increase the length of surface or area with the help of different option.

5. Offset:

    It is used to create the same surface again in required distance.

6. Edge Fillet:

    It is used to create sharp edges to round edges.

7. Boundary:

    It is used to form the boundary lines on opened surface.

8. Sweep:

    It is used to create the surface in required length from the profile.

9. Join:

   It is used to join the separate surfaces and create the single surface.

10. Close (Part command)

   It is used to create the solid part from closed hollow part.

SURFACE A CLASS:

TOOLING AXIS CREATION:

• First create the class A surface and manually analysis and fix the direction of tooling.
• In this part two hole on the surface. So, we can directly take its perpendicular as the tooling axis because its most suitable for tooling axis. Carefully watch and take this axis with the help of all types of views.
• First created the point on the surface and create new axis system.
• we directly draw line through Point & Direction on the extacted surface.
• Change some appearance to this line like thickness, colour, dot lines. Finally, it is called tooling axis. It is published for frequent uses.

DRAFTING ANALYSIS OF CLASS A SURFACE:

• Go to insert < analysis< feature draft analysis.
• Compass is fixed on the tooling axis.
• Then we click on the surface it showing different colour. This colour is used to analysis the drafting value of surface with the help of analysis table.
• It will show draft angle of class A surface.

SURFACE B CLASS CREATION:

  Following procedures are used to create surface B class.

1. We directly offset the given bumper surface at 2.5mm distance inside with the help of offset comment fore b surface
2. Some discontinuous surface filled with some comment like blend, fill, Mss etc.
3. If we need any bounty expand with the help of extrapolated comment.
4. Trim unwanted surface
5. Finally, we got surface B class.

SURFACE C CLASS CREATION:

1. Extract tool is used to create the boundary lines separately on side edges of class A surface
2. Reference surface option sweep comment is used to extrude the created separate extract boundary lines at 90 degrees.
3. Finally merge all sweep surface to get class C surface.

 FINAL HOLLOW PART:

1. Join command is used to join the surface A class and the surface A, C class
2. Trim commend is used to trim class AC and B. They join themselves.
3. Finally, we got hollow product.
4. In part bench close commend is used to get the solid model
5. We give different colours to appearance and easily analysis different parts.

DRAFTING ANALYSIS OF HOLLOW PART:

• Go to insert < analysis< feature draft analysis.
• Compass is fixed on the tooling axis.
• Then we click on the surface it showing different colour. This colour is used to analysis the drafting value of surface with the help of analysis table.
• It will show draft angle of Solid Body & Plastic Body.

RIB ROOT THICKNESS:

CLOSURE BODY WITH RIBS AND SCREW BOSS:

DRAFT ANALYSIS OF CLOSURE BODY WITH RIBS AND SCREW BOSS:

CONCLUSION:

                     Different commends are used to create the surface A class, B class, C class. Then join and convert into solid part using Part Design.Ribs & Screw Boss are created and added to the part body by CATIA software.