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

Introduction :

 In this challenge the door trim part is given. We create the Tooling axis, Class B surface, Class C surface and create dog house for required areas.

Tooling axis creation :

• In this part we simply create the Tooling axis on a surface.
• Create the point on the surface which clearing the tooling.
• Then create the line with point with direction. I use the Y direction.
• Do the draft analysis of the given Class A surface with our tooling axis.

• Our tooling axis clear the tooling direction.

Class B surface creation :

• First offset the class A surface to 2.5mm.
• We get the offset surface without some patches.

• We try to make the missing filleted areas.
• Use multi extract to extract the fillet around surfaces.
• Then extrapolate the surfaces to intersect them.

• Then trim them to make a sharp edge and fillet the edges.

• This process is similar to the bottom fillet patch creation.

• In that edge I forget to fillet it then I fillet that it make problems to create the final join.
• Then I move to make a top fillet.
• So I extract the top surface into 4 parts.
• Then I untrim the 3 surfaces.
• Use extrapolate the surfaces to intersect each other.
• And to make a trim to trim the surfaces.

• Then trim the top trimed surface to the bottom trimed surface.
• If they does not intersect extraplate them.
• And use multi extract to extract the top pocket area and top fillet area.
• Extrapolate the edges of that multiple extract.
• Then trim them and give fillets to get a Class B surface.

Class C surface creation :

• First I split the boundary of the Class A surface into 5 to 6 separate boundaries.
• Use sweep command to make a C surface.
• Use sweep with draft direction for which surface is perpandicular to the tooling axis with 3degree draft.
• And use sweep with reference surface for which suface is parallel to the tooling axis with 93degree draft.
• In some areas it make error so we make a boundary for one end and multiple extract for one end.
• Then use multi section surface to fill the areas.

• Then use Join command to join them.

• In Class B creation I make a mistake so some more gaps are formed.
• Then I use the multi section surface to complete the Class C surface creation.

Class A and Class c join, Final trim :

• Extrapolate the Class A and Class C surfaces to intersect them.
• Then make a trim to join the surfaces.
• Unhide the Class B surface then extrapolate the Class A and C join and Class B surfaces.

• Then make a final trim to trim the Class B and joined surfaces.

• In my mistake few more operations need.
• Then I replace the surfaces to make a closed body.

Closed part creation :

• Jump in to the part design.
• Insert a new body and define a body.
• Click the closed surface and select the final trimed surface to get a solid component.

• And that is add to the main body.

Dog house creation :

• Insert a new geometrical set and name it as Dog house creation.
• Extract the Inner B surface and create a point on the surface.
• And create the offset of ZX plane on that point.

• Then create the sketch with position sketch.
• I create the dog house 25mm on each side and make one side as a construction element.
• Use sweep to make the dog house wall of hight 30mm and 1.5degree draft.
• The minimum dog house hight is 6mm.

• Create the point on the top side of the dog house and create a line throght it.
• Then extrude the line to close the top of dog house.
• And trim them to get the dog house surface.
• Then use thicken surface to thicken the dog house 2mm outside.

• And I create one extrude surface to split the front portion of the dog house.
• Then draft the inner surface of the dog house at 0.5degree.

• Fillet the inner edges 1mm.
• Then I try to create the bottom contract area of dog house.
• Offset the top surface to 4mm from the bottom.
• And to extract the inner surface of dog house.
• Then offset that inner surface at 2.5*0.4= 1mm.
• And extrapolate the surface to intersect.
• Then trim them to get the bottom trimable surface.

 

• Use split command to split the dog house.
• Then draft the contract surface for 0.5degree.

• Finally fillet the inside edges for 0.5 mm and outer edge for 3mm.
• Also create the side core axis for dog house.
• Create line on the same point which we create the tooling axis at Z direction.

• Then copy the dog house and make paste special and click result with result.
• And translate to wherever we want by coordinate.
• Finally make union trim to part body with faces to keep.

Draft analysis of the final component :

• First click customize view to select maretial mode.
• Then select the draft analysis then select the compass and place it on the main tooling axis.
• Then click on the surface of the final component.
• Give draft value of 1.45deg.

Draft analysis of dog house with side core axis :

• Click the customize view and select material mode.
• And click draft analysis then select the compass.
• Then put the compass on the side core axis.
• And click on the dog house surface.
• Give draft angle 0.45degree.