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The Feature Of End Mill,Roughing End Mill,Ball Cutter

  • Author:Liwen
  • Source:Diecastingsupplier.com
  • Release on :2018-10-11
I will introduce 3 kinds of CNC Milling Cutter today : End Mill,Roughing end mill,Ball cutter

First, the specifics of these three kinds of knives are as follows:
1. End mills are those tools which have cutting teeth at one end, as well as on the sides. The words end mill are generally used to refer to flat bottomed cutters, but also include rounded cutters (referred to as ball nosed) and radiused cutters (referred to as bull nose, or torus). They are usually made from high speed steel or cemented carbide, and have one or more flutes. They are the most common tool used in a vertical mill.Common to used are ED20, ED19.05 (3/4 inch), ED16, ED15.875 (5/8 inch), ED12, ED10, ED8, ED6, ED4, ED3, ED2, ED1.5, ED1, ED0.8 And ED0.5 and so on.
2. Roughing end mills quickly remove large amounts of material. This kind of end mill utilizes a wavy tooth form cut on the periphery. These wavy teeth form many successive cutting edges producing many small chips, resulting in a relatively rough surface finish. During cutting, multiple teeth are in contact with the workpiece reducing chatter and vibration. Rapid stock removal with heavy milling cuts is sometimes called hogging. Roughing end mills are also sometimes known as "rippa" cutters. Common to used are ED30R5, ED25R5, ED16R0.8, ED12R0.8 and ED12R0.4.
3. Ball nose cutters or ball end mills are similar to slot drills, but the end of the cutters are hemispherical. They are ideal for machining 3-dimensional contoured shapes in machining centres, for example in moulds and dies. They are sometimes called ball mills in shop-floor slang, despite the fact that that term also has another meaning. They are also used to add a radius between perpendicular faces to reduce stress concentrations. There is also a term bull nose cutter, which refers to a cutter having a corner radius that is fairly large, although less than the spherical radius (half the cutter diameter) of a ball mill; for example, a 20-mm diameter cutter with a 2-mm radius corner. This usage is analogous to the term bull nose center referring to lathe centers with truncated cones; in both cases, the silhouette is essentially a rectangle with its corners truncated (by either a chamfer or radius Don).Common to used are BD16R8, BD12R6, BD10R5, BD8R4, BD6R3, BD5R2.5, BD4R2, BD3R1.5, BD2R1, BD1.5R0.75 and BD1R0.5.

Tool material: the cutting performance must have the following aspects.
1. High hardness: above HRC62, at least higher than the hardness of the material being processed.
2. High wear resistance: Under normal circumstances, the harder the material, the more carbon in the tissue, the finer the particles, the more uniform the distribution, the higher the wear resistance.
3. Sufficient strength and toughness
4. High heat resistance
5. Good thermal conductivity
6. Good process and economy