Week 9 - Attachment Feature Creation - Challenge 2

Aim :

To Create the Dog House for the Door Trim considering the design rules mentioned in the video. Consider the thickness of the part to be 2.5 mm.

Objectives :

To begin with, the tooling axis for the given Class-A Surface should be created meeting the requirements of the draft angle and at the end perform the Draft analysis on the model.

• Use Positioned sketch
• Sketches should be Iso-Constrained
• Tree Structure
• Ensure Proper Tree Structure
• Geometrical sets should have a proper name based on the sketches present inside of it
• All the sketches should be created under the Geometrical set
• Report
• A detailed report should be done explaining the draft analysis and the tooling axis creation.
• An explanation should be given on the way of creating the tooling axis, particularly the Bisecting method

Procedure :

• 1.First Thing is open the CATIA V5.
• 2.Open the given file "Door trim" CATpart" then check if the geometrical set is properly arranged or not.
• 3.Then go to the Surface workbench
• 3.Give the proper Tooling Axis.
• 4.After that work on the Door Trim Geometrical Structure.
• 5. Ensure to check the bondaries & join them properly.
• 6.Make sure that proper dimensioning is necessary
• 7.Finally check if it is Iso Constrained (Fully Constrained) or not.
• 8. By Using Surface& Part Workbench Close & Thicken the surface properly.

Let We Discuss in Detail Manner in Step By Step :

Class A Surface :

We Know that The Class A surfacing is the art in front of the engineering. It is the styling process brought in to digital life.

According to the given task we have to thickneed Class A Surface before that we need observe the Class A Surface carefully as shown in figure below.

Tooling Axis :

The tooling axis is a rotated an Angle 1 about the x-axis, then rotated an Angle 2 about the y-axis. Angle 1 about Z, Angle 2 about X. The tool axis is a rotated an Angle 1 about the z-axis, then rotated an Angle 2 about the x-axis.

In Practical based on the removal metal from core & Cavity we need a Centre of the surface that is we called as tooling axis.

Create A Dummy lines on A Bush or hole walls & Then Intersect them.

Bisecting Line:

In Geometry, a 'Bisecting line' that divides the line into two different or equal parts. It is applied to the line segments and angles.

use of those 2 dummy from intersecting sketch create the bisecting line as shown in figure below.

Publications & Tree Structure :

“Publishing geometrical elements is the process of making geometrical features available to different users”.

“A publication acts as a reference to a geometric or datum entity in a CATIA V5 part or product”.

slecting the geometrical elements for easier to show or hide when we work on the catia so that we have to select the Class A,B,C Surfaces & Tooling Axis, after that go to the tools & Select the publication Click yes & Click ok, then we got the publication on the tree As shown in figure below.

So Lets Begin With The Class B Surface Creation

Insert the Geometrical set respectively,

Class B Surface :

OFFSET OF CLASS A:

B Surface :

By Taking the Extracts & Boundaries from Offset of A & Class A Then Extrapolate & trim properly then we got he B Surface As shown in the figure below.

Class C Surface :

The Class C finish allows more imperfections than Class A or B. Class C is often specified for interior surfaces not readily visible, surfaces that will be covered by another part when assembled.

while constructing the C Surface We have to take the Boundaries Of Class A & Swept them & Trim & Join them then we Got the C Surface as shown in figure below.

CLOSE SURFACE SOLID BODY :

A closed surface contains a volume of space, enclosed from all directions.

Go to the part design workbench & Click the close surface command & click the final trim surface component then the close surface solid body formed as shown in figure below.

Now Coming To The Creation Of Dog house :

Dog House 1 :

Extraxt the close surface then make a sketch on it & Extrude & Trim proprely As Shown in figure given below.

Dog House 2 :

Extraxt the close surface then make a sketch on it & Extrude & Trim proprely As Shown in figure given below.

Dog House Thickening & Drafting & Filleting :

After that go to the part design & Thicken The extruded surface & Then Give A Proper Draft & Also fillet them According to the Design Rules As Shown in Figure Given Below.

DOOR TRIM - DOG HOUSE FINAL BODY :

Draft Analysis :

So lets discuss about the draft analysis

The Draft Analysis allows the user to easily analyze a part for proper draft angle. A Draft Angle describes the amount of taper for molded or cast parts perpendicular to the parting line.

We have 2 modes on the draft analysis Quick & Full analysis respectively.

Under the Display option we have Show are hidden the Color Scale, Analysis under the running point, No Highlight representation & Light effect.

Under the Direction option we have lock or unlock the direction, Compass & Invert.

So According to the practical Usage there Should be 1 to 3degree of angle mostly acceptable, by considering these option we have to test our given & Final Components Draft analysis.

Draft Analysis On Class A surface :

Draft Analysis On Final Component :

Draft Analysis On DOOR TRIM - DOG HOUSE :

Hence observe that the above screenshots have Fully Defined, Expanded Tree Structures & Snaps in various orientations.

Conclusion:

Successfully Created The "DOOR TRIM - DOG HOUSE" by following the design rules through the given Class-A surface.