Week 9 - Attachment Feature Creation - Challenge 2

                                                        Dog House for the Door Trim

Objective

 To Create the Dog House for the Door Trim by considering the design rules and creating the tooling axis for draft analysis.

Tooling axis

The axis in which the mold or core and cavity is opens or the axis which the designer can modify or create a model by taking axis as a reference is called Tooling Axis.

Procedure to creat tooling axis.

• Checking the Class A Surface, for to check which is the perfect place to create a tooling axis.
  Insert an axis system to the Class A Surface and by useing multipal extract, extract the base surface of the Class A Surface.
• By selecting base as a reference surface create a point.

 

• Useing extract to extract the class A Surface and take the intersection to the surface. Draw lines on the two walls, which is intersect to the A Surface.

By Bisecting line 1 and line 2 from sketch 1, with the point we get the Tooling Axis and publish that tooling axis

 

Draft analysis 

Draft analysis is a method to check the draft angle of the model in various faces and to creates draft on the surface to reduce the friction in the Ejection process.

Procedure to Draft analysis

Draft analysis of Final Solid Surface

• In draft analysis we taking of Final Solid Surface to draft.
  Check the view mode and change it to material mode.
• Select the draft analysis tool in the tool bar and select Campass in the Direction option of the draft analysis tool. Then move the campass on the tooling axis at draft direction and lock the draft direction.

• Useing the running pointer we see the draft angle at different surfaces of the Door Trim.

Then by useing the color scale option we can change the Draft angle.The green color shows if the draft angle is 3 degree, red shows if the draft angle is between 0 to 3 and blue shows the negative draft angle.

 

 Dog House

Dog house is designed to prevent the sink marks and to reduse the thickness of the mold.

Construction of Dog House

• To Create a dog house extract the surface from the solid door trim and create a point on the surface. Create a side core axis which is perpendicular to the tooling axis.

• By using positioned sketch draw the dog house and create outer walls by sweep the wall at 1.5 degree. And close the top wall using the extract and extrudeing the surface. Converting the walls to solid by useing thicksurface command , increase the thickness to 2 mm.

• Doghouse wall thickness at the intersection of the part wall ( C ) should be 40% or less than the main wall stock ( T ). The height of  ( B ) should be between 3.0 – 6.0 mm according to the design rules.

 C = 0.4 * T

C = 0.4 * 2.5

C = 1 mm

• I taken B value as 4 mm.

Draft analysis of Dog House

• In draft analysis of Dog House we taking Dog House Solid surface to draft.
  Select the draft analysis tool in the tool bar and select Campass in the Direction option of the draft analysis tool.
• Then move the campass on the tooling axis at draft direction and lock the draft direction.Useing the running pointer we see the draft angle of the Surface of the Dog house.

• Then by useing the color scale option we can change the Draft angle.The green color shows if the draft angle is 1.45 degree,red shows if the draft angle is between 0 to 1.45 and blue shows the negative draft angle.

Screenshots of the completed design in various orientations

Tree Structure