Week 8 - Challenge 4 - Bumper
Draft,
Draft is an angle provided to the plastic part, which is used to eject or removes the material from the mold easily without any damages. Draft is a taper applied to the faces of the part that prevent them from being parallel to the motion of the mold opening.
Draft analysis,
Draft analysis, which is used to find out the proper tooling axis of a plastic component. it is a technique used to analyze whether our part model created in CAD is manufacturable based on the draft condition applied.
Class A surface draft analysis,
Color Code scale,
Steps for draft analysis using bisecting method,
- Refer the views of the given class A surface in X,Y,Z directions. finding out the direction where most of the surface are visible.
- In bumper most of the surfaces visible only in X direction.
- In X direction dummy tooling axis has drawn in a flat surface.
- An axis system fixed in the reference point in which dummy axis has drawn.
- Then using the yz plane and class A surface to get the intersection line.
- Based on the intersection lines which are parallel to the dummy axis are selected for to get the proper tooling axis.
- The parallel lines are extrapolated or a new line is has drawn on the same intersected parallel lines.
- Based on the extrapolated parallel line one line has drawn by using the bisecting line command.
- In this class A surface tooling clearing in X direction is considered as Tooling axis.
- In the main tooling axis the draft analysis compass has fixed and used the running point i have measure some points. at the end i have found out the draft angle as 2.6 deg for closure cad part.
- And i have changed the green side in top using the flip option, have changed the colors in color scale.
- At the end of class A surface draft analysis i have got complete green surface ( cavity side ).
- At the end of solid part draft analysis i have got cavity side as green in color, core side as red in color.
Solid part draft analysis,
color code scale,
Views,
Close surface,
Publication,
