Backed cutters

Cutters that have backed teeth are used to process shaped surfaces, Cutters that have backed teeth are used to process shaped surfaces, such as, for example, the surfaces of spline rollers, gear teeth, and so on.

These cutters have a back surface and a tooth back, made in the form of an Archimedean spiral, in which the angle of elevation creates a back angle.

The backfilled cutters are sharpened along the front surfaces of the teeth, the profile of the blade after overfilling remains unchanged in the radial section until the cutter is fully used.   Shapes of pointed and backed teeth of milling cutters Features of angle measurement The angle is measured between the tangent to the spiral and the tangent to the circle, which are drawn from the top of the tooth.

They differ in the direction of the teeth of cutters with screw teeth, in which the blades are helical in relation to it and with straight teeth, in which the blades are parallel to the axis of rotation.

Milling cutters are made with screw grooves on both sides.

The rear angle is measured in a plane that is perpendicular to the axis of the cutter, that is, in the plane of the end face.

The angle formed by the blade and the axis of the cutter is called the angle of inclination of the spiral or helical groove.

The posterior normal angle is measured in a plane that is perpendicular to the blade.

The front transverse angle is measured in a plane that is perpendicular to the axis of the cutter.

The working part of the end mill has auxiliary and main blades.

The front angle is measured in a plane that is perpendicular to the blade.

09 Martha 2017

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