CUTTING INSERT HAVING A CUTTING EDGE GENERATING AN INDICATOR THAT THE END FACING HEIGHT HAS BEEN EXCEEDED

摘要

The invention relates to a cutting insert (10) having a cutting tip (3a) and a cutting edge (4a) for jointly performing a surface grinding-end facing operation. A second cutting edge (4b) is not normally active during the surface grinding-end facing operation performed by the cutting tip (3a) and the cutting edge (4a). However, said cutting edge (4b) may become active if the maximum end facing height of the cutting edge (4a) is unintentionally exceeded. The operator may not realise that the height has been exceeded due to the only slight incline between said cutting edges (4a, 4b). In order to avoid said drawback, another cutting edge (4c) is made as a groove between said two cutting edges (4a, 4b). Thus, said cutting edge (4c) machines a protrusion on the workpiece above the faced surface when the maximum end facing height of the cutting edge (4a) is exceeded. Said protrusion forms an end facing height-exceeding indicator that can be seen by the operator.