A milling cutter is a rotary tool with one or more teeth for milling. When working, each cutter tooth successively intermittently cuts off the workpiece's margin. Milling cutter is mainly used in milling machine processing planes, steps, grooves, forming surfaces and cutting workpieces. There are many kinds of milling cutters on the market at present, and there are different materials of milling cutters. So, do you know how to classify milling cutters?
There are many ways to classify milling cutters, which can be classified according to the direction of the cutter teeth, according to the purpose, the form of the back of the teeth, according to the structure, materials, etc.
First, according to the direction of the knife teeth classification
1, straight teeth milling cutter
The teeth are straight and parallel to the axis of the milling cutter. But now the ordinary milling cutter has rarely made straight teeth. Because all the teeth of the milling cutter are in contact with the workpiece at the same time, and leave the workpiece at the same time, and the front teeth have left, the back of the tooth may not have contact with the workpiece, easy to produce vibration, affecting the processing accuracy, but also reduce the life of the milling cutter.
2, spiral tooth milling cutter
Spiral teeth This kind of milling cutter has the difference between the left hand and the right hand, because the knife teeth are tilted around the knife body, in the processing, the front teeth have not left, the back teeth have begun to cut. In this way, there will be no vibration during processing, and the processed surface will be lighter.
2. Classification by use
1, cylindrical milling cutter
Used for machining surfaces on horizontal milling machines. The cutter teeth are distributed on the circumference of the milling cutter, which are divided into straight teeth and spiral teeth according to the tooth shape. According to the number of teeth divided into coarse teeth and fine teeth two. The helical coarse-tooth milling cutter has few teeth, high tooth strength and large chip space, which is suitable for roughing. Fine tooth milling cutter is suitable for finishing.
2. Face milling cutter
For vertical milling machines, face milling machines or, gantry milling machines, upper machining plane, end face and circumference. There are knife teeth on the upper part, and there are coarse teeth and fine teeth. Its structure has three kinds: integral, inserted and indexable.
3, end milling cutter
Used for processing grooves and step surfaces, etc. The cutter teeth are on the circumference and end face, and can not be fed along the axial direction when working. When the end mill has an end tooth through the center, it can be fed axially.
4, three edge milling cutter
It is used for machining various grooves and step surfaces with cutter teeth on both sides and on the circumference.
5, Angle milling cutter
For milling grooves to a certain Angle, there are two kinds of single Angle and double Angle milling cutters.
6, saw blade milling cutter
It is used for machining deep grooves and cutting workpieces, and there are more cutter teeth on the circumference. In order to reduce friction during milling, both sides of the cutter teeth have a secondary declination Angle of 15' ~ 1°. In addition, there are keyway milling cutter, dovetail slot milling cutter, T-shaped slot milling cutter and various form milling cutter.
Three, according to the form of teeth classification
1, sharp teeth milling cutter
This kind of milling cutter is easy to manufacture, so it is also widely used. After the teeth of the milling cutter are blunt, the back knife face of the teeth is sharpened with a grinding wheel on the tool grinder, and the front knife face has been done in the production west, and no further grinding is needed.
2, shovel teeth milling cutter
The back face of this milling cutter is not flat, but curved. The rear cutter face is made on the shovel lathe. After the teeth milling cutter is blunt, only the front cutter face needs to be sharpened, rather than the back cutter face. The characteristic of this type of milling cutter is that the shape of the cutter teeth is not affected when grinding the front cutter face.
4. Classification by structure
1. Whole body
The tool body and teeth are made into one. It is relatively simple to manufacture, but large milling cutters are generally not made of this kind, because it is a waste of material.
2, welding type
The teeth are made of carbide or other wear-resistant tool materials and brazed to the tool body.
3, insert type
The cutter body is made of ordinary steel, and the tool steel blade is inserted into the cutter body. Large milling cutter
Most take this approach. Milling cutter with insert tooth method can save tool steel material, but also in case one of the teeth is broken
It can be removed and replaced with a good one without sacrificing the entire milling cutter. However, the small size of the milling cutter can not use the insert tooth method because of its limited status.
5. Classification by material
1, high-speed steel tool; 2, carbide tool; 3, diamond tool; 4, other material tools, such as cubic boron nitride tools, ceramic tools, etc.
The above is the introduction of how to classify the milling cutter, there are so many kinds of milling cutter, when choosing the milling cutter, it is necessary to consider its number of teeth, affecting the smoothness of the cutting and the requirements of the machine tool cutting rate.
