What is a milling cutter head?

Face milling cutter, also known as disc milling cutter, is used for machining plane on vertical milling machine, end face milling machine milling machine or gantry milling machine. There are cutter teeth, coarse teeth and fine teeth on the end face and circumference. Its structure has three types: integral, embedded and indexable.

Face milling cutters are divided into two types: one is that cemented carbide blades are fixed on the cutter teeth by brazing, and then the cutter teeth are installed on the cutter body, which is called flank milling cutters;

The second is to install the cemented carbide blade directly on the cutter body of the milling cutter, and then fix it with screws, which is called indexable clamp milling cutter. Face milling cutter has two rake angles: axial rake angle and radial rake angle. According to the material and cutting conditions of the machining object, the direction of the two rake angles, that is, positive+,negative-or zero, is selected.

Extended data

Main structural parameters

(1) diameter and number of teeth are two main structural parameters of face milling cutter. In order to meet different cutting requirements, the national standard stipulates that the number of teeth of face milling cutter with the same diameter can be divided into three types: coarse, medium and fine. Taking the diameter 100 mm as an example, the three kinds of teeth are 5, 6 and 8 respectively.

(2) Geometric Angle The main geometric angles of indexable face milling cutter are main deflection angle κr, back inclination angle γp and side inclination angle γ F. There are four main deflection angles: 45, 60, 75 and 90, of which 75 is the most commonly used. When machining flat or thin-walled workpieces with shoulders, 90 should be selected.

The back inclination γp and side inclination γf can be combined into positive inclination type, negative inclination type and positive and negative inclination type. Positive rake angle is used to process general materials, such as γ p = 7 when milling ordinary steel and iron castings, γ f = 0 when milling aluminum alloy, γ p = 18, γ f = 1 1.

Negative rake angle is used to process cast steel and hard materials. The commonly used positive and negative rake angles are γ p =-7 and γ f =-6, which have good impact resistance and chip removal performance. It is suitable for milling general steel and cast iron, and is mostly used in machining center machine tools. The commonly used values are γ p = 12 and γ f =-8.

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