In recent years, the technology required to support high feed processing (HFM) has been rapidly developed.

Using this technique, machine operators can quickly remove large amounts of chips and thus significantly increase productivity.

The advantage of HFM milling cutters lies in the special geometry of the cutter itself and the insert. The lead angle and depth of cut are small. In order to achieve an acceptable value for the average chip breaking thickness, the feed per tooth must be high. Looking at the formula for calculating the average chip breaking thickness, this concept will become clear:

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Productivity in operation: High feed processing allows faster metal removal rates.

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Hm=fz· (ae ) 1⁄2 ·sinK Dc ​​fz=hm· (Dc) 1⁄2· 1 ae sinK Where: hm——average chip breaking thickness fz——feed per tooth ae——cutting width/radial cutting Depth Dc—Knife Diameter K—Prime Angle The K angle of the high-feed blade is quite small (13,8°); that is, to obtain an acceptable average chip breaking thickness, the fz value must be very high. The graph (bottom center) shows the functional relationship between the feed (Y-axis) and the leading angle (X-axis). When the tool is full-edged (Dc/ae=1), the average chip breaking thickness is 0.1 mm. Another advantage of this type of tool and depth of cut is that the stress distribution is directed axially towards the main axis, ensuring stability and preventing elastic deformation caused by transverse stresses. Therefore, they are reliable tools, especially for long overhanging rough machining and cutting of difficult-to-machine materials such as high-temperature alloys and stainless steel.

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