Creo NC Sheetmetal > Shear NC Sequence > About Shear NC Sequences
About Shear NC Sequences
The Shear NC sequence creates a point-to-point tool path along a sketched contour. The tool path is broken down into smaller elements called strokes that in turn are broken down into hits. Hits are the smallest elements of the tool path. Hits indicate each location where the tool makes contact with the workpiece and removes material. A succession of hits along an entity of the sketched contour composes a stroke. When the tool path is generated, strokes appear as a series of hits connected by a line. The distance between the hits is calculated based on the actual tool size.
Use the OVERHANG_DIST parameter to specify the distance by which each hit overlaps the previous one. By default, the tool path along each entity in the sketched contour is equal to the length of the entity. You can specify shake-away points or vertices and overhang vertices, where the tool path is, respectively, trimmed or extended by a specified distance, similar to Nibble Edge NC sequence. These distances are defined by NC sequence parameters SHAKEAWAY_DIST and OVERHANG_DIST.
Shearing NC sequences can be performed using either a Standard Punch type tool, or a special Shear type tool, that has width equal to zero. Use the CLOUTPUT command to output the tool path. Other manufacturing parameters for Shear NC sequences are similar to those for Nibble Edge.