Tangent Surface Extensions

Mold Design is one of several disciplines that often require the creation of surface extensions or patches that are tangent to existing geometry.  But when working from a solid edge, there are surfaces on both sides, which brings up the question which set of faces the tangency will be taken from.  To help with this decision, Cimatron adds the Flip option, which provides a quick preview of each of these options in functions such as Bounded Face and Extend Face.

Ejector Pocket

One of the most valuable functions for mold design in Cimatron is the Ejector Pocket.  In a single step, it allows you to assign a variable clearance depth and a diameter to any number of ejector pins, then use these values to cut holes in the mold plates.  With so many simultaneous cuts being created in both closed and open solids, you may see an occasional result that looks more like an extrusion than a hole.  This occurs when the system has inadvertently flipped the object direction of an open solid. The fix for this is to edit the Ejector Pocket function in the tree of the part that received the reversed holes and invert the solid direction.

Points on Cone Centers

Anytime a pattern of holes exists, either on electrodes or on common parts such as speaker grills, the hole centers must be referenced.  However, when the part shape is contoured, there is no true circle to provide the center point.  This presents a unique challenge, but one that Cimatron can solve with a special selection filter.  While in the Point function, open the filter dialog and set it to Center and 3D Cone Edge.  This filter not only allows for a box selection of multiple curves, but can also determine the true centers of 3D curves that are not arcs.

Composite Face

The Faces / Composite Face function is often used to merge multiple segmented surfaces to simplify the geometry.  Within Composite Face, the option to merge Same Type Faces Only allows you to select a far greater number of faces and get a faster result.  The system will automatically identify adjacent faces that are of the same type and merge only these, while keeping round and contoured surfaces separate.

Assembly Mirror

In any kind of mold or assembly design, there is a common need for parts that are mirrored.  However, the word mirror can be used to describe two different conditions: one would be parts that have a mirrored position in the assembly, and the other would describe parts that are geometrically mirrored in their shape.  The Cimatron Assembly Mirror function provides options that take care of both of these situations in a streamlined and automated fashion.  Each of the selected part is copied through the mirror plane, and the system runs an analysis to find the most economical result.  The parts that can be rotated to provide a mirrored position will be shown in blue, and those that must be geometrically mirrored will be shown in pink.  You can influence these results by requesting that all catalog parts would be only positionally mirrored, or choose to geometrically mirror every part.  When these global options still do not provide enough control, you can click on any part preview to get an individual control dialog for setting the mirror status precisely as required.

Streamline Design with Electrode Blank

Nov 2015 tip 3The Electrode Blank function provides some powerful and unique functionality that streamlines the electrode design process. It can perform look-ahead calculations based on features that appear further downstream in the part history tree.  The Re-center and Re-fit options allow you to adjust the blank location and size while accounting for any extra geometry you may have created for clearance and shape extensions.  A newly-added option is Re-fit Height, which can determine the new top Z level for the electrode based on the finished electrode shape.