• June 21, 2024
  • Shatou, Changan, Dongguan, CN
milling cutter

Types of Milling Cutters

A milling cutter is a rotating tool that has one or more teeth used for milling. When in operation, each tooth cuts off the material of the workpiece intermittently. Milling cutters are primarily used for machining planes, steps, grooves, forming surfaces, and cutting off workpieces on milling machines. This article presents a detailed summary of the different types of milling cutters.

According to the material:

White steel milling cutter

Also known as high-speed steel, the hardness is softer, high-speed steel knife is cheap, good toughness, but the strength is not high, easy to let the knife, and wear resistance, thermal hardness is relatively poor, the thermal hardness of high-speed steel milling cutter is about 600 degrees, when milling hard materials with white steel, if the coolant is not in place, it is easy to burn the knife, which is one of the reasons for the low thermal hardness.

Carbide milling cutter

Carbide (tungsten steel) has a series of excellent properties such as good thermal hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance. In particular, the high hardness and wear resistance remain basically unchanged even at 500 degrees, and still have high hardness at 1000 degrees.

Ceramic milling cutter

Also known as oxide milling cutter, has extremely high hardness, heat resistance up to 1200 degrees, and extremely high compressive strength, but it is too brittle so the strength is not high, so the cutting volume should not be too large. Therefore, it is more suitable for final finishing, or other highly wear-resistant non-metallic processed products.

Superhard material milling cutter

Whether it is excellent in hardness, wear resistance, or heat resistance, it has enough toughness, and its temperature can reach 2000 degrees. Because it is too brittle and not strong, it is more suitable for final finishing.

According to the blade manufacturing method:

Grinding blade

This type of blade has better dimensional accuracy, so the positioning accuracy of the blade in milling is higher, and better machining accuracy and surface roughness can be obtained. The ground blade with a large rake angle can be used for milling viscous materials (such as stainless steel). Through the shearing action of the sharp blade, the friction between the blade and the workpiece material is reduced, and the chips can leave the front of the blade faster.

Pressed blades

It is better to use pressed blades for rough machining, which can reduce processing costs. The dimensional accuracy and edge sharpness of pressed blades are worse than those of ground blades, but the edge strength of pressed blades is better, and they are impact-resistant during rough machining and can withstand large depth of cut and feed.

Combined blade

The pressed blade is installed in the blade seat of most milling cutters, and then a ground scraper blade is configured, and the scraper blade removes rough machining tool marks.

According to the number of milling cutter teeth:

When choosing a milling cutter, the size of the tooth pitch will determine the number of teeth involved in cutting at the same time during milling, which will affect the smoothness of cutting and the requirements for cutting rate of the machine tool.

Coarse-tooth milling cutter

It is mostly used for rough machining because it has a large chip pocket. If the chip pocket is not large enough, it will cause difficulty in chip rolling or increased friction between chips and the workpiece of the cutter body. The chip load per tooth of a coarse-tooth milling cutter is greater than that of a fine-tooth milling cutter.

Fine-tooth milling cutter

It is mostly used for fine milling. The cutting depth is shallow during fine milling, the required power is not large, and a larger feed rate can be selected.

According to the type of milling cutter blade:

Flat bottom milling cutter

Also known as end milling cutter, light knife, gong knife and purple knife, it is often used for finishing, semi-finishing and finishing machining planes, side planes, grooves, and mutually perpendicular step surfaces. The more milling cutter blades, the better the effect after finishing.

Rough skin milling cutter

Also known as wave edge cutter, used for rough machining of the workpiece surface, according to the shape of the wave edge, it is divided into coarse teeth, medium teeth and fine teeth. The tooth shape is different, and the processing parameters are also different. In general, this type of milling cutter allows a large amount of cutting, so the roughing of the workpiece is the first choice.

Ball-end milling cutter

Because the shape of the blade is spherical, it is called a ball-end milling cutter, also known as a computer ball cutter or an R milling cutter. It is often used for semi-finishing and finishing of various curved surfaces and arc grooves.

Round nose milling cutter

Also known as bullnose milling cutter or fillet milling cutter, it is mostly used for processing right-angled step surfaces or grooves with R angle, and it is mostly used for semi-finishing and finishing.

Copper-aluminum milling cutter

It is mainly made for the characteristics of copper and aluminum materials. It is characterized by large rake angle, large relief angle (sharp teeth), large spiral, and good chip removal effect. It is the first choice for copper and aluminum processing.

T-groove milling cutter

Mainly used for T-groove and side groove machining.

Chamfering milling cutter: mainly used for inner hole chamfering and shape chamfering of molds, with chamfering angles of 60 degrees, 90 degrees and 120 degrees.

Inner R milling cutter

Also known as concave arc end mill or reverse R ball cutter, it is mostly used for milling special milling cutters for convex R-shaped surfaces.

Countersunk milling cutter

It is mostly used for the processing of hexagon socket screws, mold thimbles, and countersunk holes of mold nozzles.

Slope knife

Also known as taper knife, it is mostly used for taper surface processing after ordinary blade processing, mold draft allowance processing and dimple processing. The inclination of the tool is in degrees on one side.

Dovetail milling cutter

Shaped like a swallow’s tail, it is mostly used for processing dovetail grooved workpieces.

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