Week 8 - Challenge 1 - Draft Analysis on a Fan Cover

                                                         DRAFT ANALYSIS OF FAN COVER

Draft Angle: It is rare to find the product without having draft angle. It is given to the side faces of the injection moulded part for easy ejections using ejection pin.

The class A surface of fan cover is provided to us:

      

                                                                Fig.1: Class A Surface

At first we will check if there is any discontinuity in the class A surface designed. For the check we will use Boundary definition option to check the discontinuity in the surface.

  

                                                          Fig.2: Boundary Definition

After analyzing the shape of the fan cover to provide tooling axis and try to minimize or avoid side cores as much as possible. For this surface we create dummy tooling axis in z direction by creating a point and datum axis at the point.

      

                                                        Fig.3: Dummy tooling axis

Now we create intersect on the XZ plane by using intersection definition command

   

                                                         Fig.4: Intersection at XZ plane

After inspecting the intersection line we will find the parallel surfaces for the dummy axis line which may create problem while creating the component. Drawing the line through the parallel surfaces.

    

                                                                  Fig.5:Dummy Tooling Axis

Now, using the bisecting line option we create a line between the parallel surfaces which will be the tooling axis in xz direction.

   

                                                              Fig.6: Bisecting Lines

   

                                                           Fig.7:Tooling axis in xz direction

Now, creating the tooling axis for YZ direction using same steps as used in XZ direction.

   

                                                        Fig.8 : Intersection at YZ plane

   

                                                   Fig.9: Extending parallel surface to dummy axis  

   

                                                                Fig.10: Bisecting Line

   

                                                          Fig.11: Tooling axis in YZ direction

As we have both the tooling axis in XZ and YZ direction we now bisect these tow line as per datum line to obtain the required tooling axis for the fan cover.

  

                                                             Fig.12: Tooling Axis

After preparing tooling axis we need to de draft analysis on the fan cover for that we need to enable by

Inset>Analysis>Feature draft analysis.

After enabling draft analysis we select compass option and put compass over tooling axis to get the required direction of draft analysis and then lock the draft direction.

  

                                                        Fig.13: Compass on tooling axis

   

                                                         Fig.14: Draft Analysis Report

 

                                                          Fig,15: Isometric View

                                                              Fig.16: Front view

 

                                                                  Fig.17:Side view

                                                                       Fig.18:Top View