| |
 |
| |
 
How to Choose Depth of Cut and Feed
The depth of cut and the feed directly influence the performance and tool life of an insert. If the depth of cut is too large for the width of an insert, or the feed too high, the insert may be overloaded, causing immediate breakage. The chart provides the recommended ranges for depths of cut ap and feed f for each insert width W.
If the depth of cut, relative to feed, is too small, the resulting side forces will not be sufficient to properly deflect the tool.
Vibration and instability may occur.
Minimum Depth of Cut
The depth of cut has a significant influence on side deflection. Using a small depth of cut with a wide insert may result in a deflection that is too small to be effective. This may result in vibration. In the finishing operation, when the depth of cut is normally minimal, it is important to select the proper insert with a small width and a small corner radius. The chart shows the recommended minimum depth of cut and minimum feed, as functions of insert width and corner radius.
Insert Width
The width of an insert contributes to its strength and, therefore, should be as large as possible relative to the dimensions of the workpiece. The width of an insert determines the permitted overhang of the tool. The larger the insert, the wider the upper and lower jaws can be. However, higher forces are required to effect the necessary side deflection. If the depth of cut is small, the width of the insert should be proportionately smaller so as to guarantee the required deflection.
|
|