Week 9 - Project - A pillar Design with Master Section

AIM

To make a full solid model from the provided master section and class A surface.

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.

DOG HOUSE:

It is used mainly for three functions.

• To eliminate the sink marks
• To lift the bosses for hight
• To give outside bosses from B surface

RIBS:

Ribs give strength to the model. It is made by some guidelines like draft, fillets etc.

MASTER SECTION:

They check and give new alteration model in 2D with class A surface which is used make 3D model for next step designing.

METHODOLOGY:

Part body:

Engineering Feature:

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.

11. Curve smooth:

It is used to change the smooth curve from tangency curve.

12. Fill:

Fill some gaps portion with this comment

13. Blend:

Two bounty lines used to fill the gaps by this comment.

14.Split:

It is used separate the surface with the help of another surface as cutting tool.

15. Pad:

It is used to extrude to create 3D part from 2D sketch.

16.Thicken:

It is used to give thickness of the surface model. It is one of the part bench comments.

SURFACE A CLASS:

MASTER SECTION:

They have given master section which is used as reference and form B surface and engineering surface.

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.
• Then this intersect line is used to create the new lines on both wall lines. Then the both lines are used to create a bisecting line in tooling direction or it is zero degree drafting part, so we directly draw line through the line to form tooling axis.
• Change some appearance to this line like thickness, colour, dot lines. Finally, it is called tooling axis. It is published for frequent uses.
• Dog house is created by side core. So, we created separate tooling axis for dog house. Same method is used to create a tooling axis parapedicular to the main axis.

DRAFTING ANALYSIS:

• 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 is zero-degree draft component. So, we no need to take drafting analysis. If we take it will show zero-degree draft angle.

SURFACE B CLASS CREATION:

Following procedures are used to create surface B class.

1. We directly offset the given bumper surface at 3mm 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. Sweep comment is used to create surface C class for separate edges from given master section reference. Finally merge all sweep surface to get class C surface.

FINAL 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.

DOG HOUSE:

1. First draw the rectangle with one side open
2. Extrude required hight or given height 30mm.
3. Offset used to close the top side
4. Give thickness to the surface part 2.5mm.
5. Give drafting to outside surface 1.5 degree.
6. Give inside and outside fillets
7. Then follow some dog house standard instruction like downside thickness and hight and some values.
8. Offset the previous surface part 1mm and downside surface offset upside 4mm
9. Trim and form down side part
10. This part split from previous part body
11. Give draft and fillet to the top wall of split portion. This draft is given for side core so we create separate tooling axis parapedicular to the main tooling axis and give draft for this direction.
12. Finally, we have got dog house. Next, we will create the ribs on the dog house middle surface.
13. So, we created middle part separately.

RIBS:

1. In this part two ribs are created on the dog house middle surface.
2. Master section dimensions are used to draw two parallel lines on the dog house.
3. Surface extrude comment is used to extrude the two lines.
4. Thicken comment is used to give thickness of the extrude surfaces and give draft 0.5 degree to the ribs
5. It is ribs which are joined with middle surface by assemble or union trim operation.
6. Then give fillets 0.25mm to the ribs.

TOP HOLE AND FINAL JOIN:

1. In this part there is hole like on the top of the dog house.
2. First, created middle part is joined with dog house.
3. The draw hole on the top wall and extrude the this extrude surface is used to split from the dog house. We finally got full engineering feature.
4. The this dog house model is joined with the created pillar body by union trim operation.
5. Finally, we have got full model with master section reference. Next we will do draft analysis.

DRAFTING ANYLYSIS:

If we want, Again, Same drafting analysis procedure is used to analysis the drafting angle. It is used to determine the drafting angle of part in difrent postion by main tooling axis and side core tooling axis.

CONCLUSION:

Different commends are used to create the surface A class, B class, C class. Then join and convert the solid. Finally, B surface and solid part of door trim are created from provided class A surface. Dog house with ribs are created by standard guide lines. Full model is successfully created by master section and draft is analysed by CATIA software.