Week 10 - Challenge 2- Attachment Feature Creation (Dog House)

AIM 

To Create the Dog House for the Door Trim considering the design rules through the given Class-A surface.

THEORY

Tooling Axis

Tooling Axis is the direction in which the mold or core and cavity opens and closes. While designing a component first thing is to define the tooling axis. 

Procedure

• Check the connectivity of given Class A Surface i.e no gaps between the surfaces.
• Analyse the component along x,y,z direction and check which is the best possible tooling direction (Here Y)
• Create a point at flat surface by extracting it.
• Draw a line perpendicular to extracted flat surface through the point and that is the tooling axis.

• Tooling Axis By Bisecting Method

  • Check the connectivity of given Class A Surface i.e no gaps between the surfaces.
  • Analyse the component along x,y,z direction and check which is the best possible tooling direction (Here Y)
  • Create a point at base surface by extracting it.
  • Create an axis system with that point as origin.
  • Create an intersection of class A in xy axis
  • Create two lines with reference of faces which we think will create problems.
  • Create a bisecting line with the lines drawn, which will gives us the tooling axis.

  Side Core Tooling Axis

  Here while creating the Dog House inside part will not clear the draft with main tooling axis so in order to clear the draft direction we will introduce tooing axis from the side which is prependicular to the face that is not clearing the draft in main tooling axis direction 

  Draft Analysis

  Draft analysis is used to analyze whether the part model created in CAD id manufacturable based on the draft condition applied.

  Draft is required on all parts in the direction of mold movement in order to allow parts to release or eject from the mold properly. Most part or application require minimum 0.5o-1o</math>">0.5o−1o0.5�-1�  as draft angle, however 3o</math>">3o3� is widely accepted as the norm.

  Procedure

  • First change the view to " Customize View Parameters" and select Material option.
  • Select Feature Draft Analysis from the tool bar.
  • Click on the direction, drag and drop the compass to the component such that it should coincide with the tooling axis.
  • Lock the draft direction and click on the component.
  • Green colour shows the positive draft, cyan as zero degree and red as negative draft
  • Class A Surface: Class A surface is any of a set of freeform surfaces of high efficiency and quality. In other words, Class A surface is the aesthetic surface.
  • Class B Surface: Class B surface is the thickened suface or engineering surface where all ribs, screw bosses, dog houses etc will come.
  • Class C Surface: It is the Surface which joins Class A and Class B surfaces.

  • SOFTWARE USED

    Catia V5

    DESIGN CONSIDERATON

    Thickness T : 2.5mm

  • Tooling Axis
  • 

  • Draft Analysis

    Class A Surface

  • The given Class A Surface is not clearing draft fully, it has some negative draft in some of the areas. So we have to inform the Stylilng team about this, but for this challenge purpose we are proceeding with this surface. 

    Solid Component

  • Dog House

    Main Tooling Axis

  • 
  • Class A Surface

  • Class B Surface

  • Class C Surface
  • Final Joined Surface

  • Dog House

    Sketch

  • 3D Model

  • Final Component With Dog House In Various Orientations

    Isometric View

  • 
  • Front View
  • 
  • Left Side View
  • 
  • Right Side View
  • 
  • Top View
  • 

• CONCLUSION

  Dog House for the Door Trim considering the design rules has been created in Catia.