Type of Face Mill

In the milling cutter for processing,face milling cutter teeth is one of the important factors to be considered, there are too many face mill with 3 ,4,5 or more insert, and the question is which number of face mill teeth are the best for processing milling?
The number of teeth of different diameter milling cutter has the corresponding provisions, according to the size of the diameter of the blade teeth, can be divided into sparse teeth, dense teeth, ultra-dense teeth.

1 Sparse type
Blade body is low, suitable for general machine tool large margin rough processing, chip space larger, this tool can produce continuous chip cutting of soft materials, or cutting width of the larger processing. When the machine power is small, in order to make the cutting more stable, usually also use comb teeth cutter for processing.
2 Dense tooth type
Blade body rigid general, the Department of universal series, the use of a wide range for general conditions, low feed, small cutting depth, with high metal removal rate and cutting stability.
3 Super-dense tooth type
Blade body is the best, is conducive to the smooth conditions of processing, generally used for cast iron, aluminum and non-ferrous metal feed speed processing, but also for high-temperature alloy super-cutting, narrow cutting and no need for space Cutting. In the professional production (such as pipeline processing), in order to make full use of equipment power and meet the production requirements of the rhythm, but also often use ultra-dense tooth cutter (at this time mostly dedicated non-standard cutter).

In order to prevent the process system resonance, so that smooth cutting, there is an unequal pitch milling cutter. The so-called unequal division refers to the cutting edge of the cutter, which is intended to be divided according to different sizes. For example, the equalization of the 6-edge cutter should be kept at a pitch of 60 °, and the division angle is set to 65 °, 56 °, 59 °, 65 °, 56 °, 59 °. The purpose of this is to suppress high frequency vibrations.

The size of the pitch determines the number of blades involved in the machining at the same time. There should be at least one blade involved in the cutting process to avoid milling damage, resulting in damage to the tool and overload of the machine.

The number of teeth to be selected must be such that the resulting chips are properly curled and easily removed from the machining area. Improper chips space will lead to poor chip removal, damage to the tool and may damage the workpiece.

Increasing the number of teeth of the milling cutter is an important way to improve the efficiency of the table feed. For the dense and super-dense face milling cutter, even if the same blade feed, increase the number of blades can also increase the table feed. But the increase in the number of edges will bring the increase in cutting force, in the cutting depth, low rigidity of the workpiece will lead to the occurrence of high-frequency vibration and deterioration of the processing accuracy. In this process need to pay special attention to cutting the workpiece, the workpiece shape and clamping rigidity and other issues.