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AIM: Create the Base Bracket Plastic component through the given Class-A surface. And perform the Draft analysis on the model. OBJECTIVES: To model a base bracket and perform draft analysis on the model. THEORY: Draft Analysis: Draft analysis helps to detect if your drafted part is easily removable from the mold…
Mukesh Kanna S
updated on 14 Aug 2022
AIM:
Create the Base Bracket Plastic component through the given Class-A surface. And perform the Draft analysis on the model.
OBJECTIVES:
To model a base bracket and perform draft analysis on the model.
THEORY:
Draft Analysis:
Draft analysis helps to detect if your drafted part is easily removable from the mold (in case of plastic component) or die (in case of sheet metal). All plastic components will have a minimum draft of 0.5 to 3deg. And for automotive sheet metal parts the draft will be 7deg or more. If a mold wall is perpendicular to the part ejection, there is ample friction or interference between the mold and the part which will not allow one to release from the other. This is why design engineers give a minimum draft to the part.
In CATIA V5 the feature draft analysis dialog box look like this:
Mode:
Display:
Direction:
Tooling Direction:
The Tooling Direction is basically the direction that the mold pulls apart. The mold is built in two separate pieces, basically. You have a Cavity side and you have the Core side. The Core pulls apart from the Cavity and that's the Dyeline or the Tooling Direction. There are different methods to find out the tooling direction. Here we are using bisecting method to find out tooling direction. We can use any method the ultimate aim is to reduce the cost of manufacturing by reducing the complicity in manufacturing the component.
PROCEDURE:
The procedure is divided into two parts first creating the tooling axis then performing the draft analysis.
Creating tooling axis using bisecting method:
Performing the draft analysis:
RESULT FOR DRAFT ANALYSIS:
Report for the CLASS A surface:
Report for the final plastic component:
FEATURE TREE:
Screenshots of the solid model with the proper color code of the draft angle in various orientations:
Isometric View
Front View
Side View
Top View
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