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Characteristics of alloy milling cutter in machining process


Characteristics of alloy milling cutter in machining process

Alloy milling cutter is one of the cutting tools in China at present. On the premise of giving full play to its advantages and considering its low production cost, the users who use it to replace high-speed steel milling cutter have increased rapidly in recent years. The following small series will focus on its information.

Alloy milling cutter is a commonly used cutting tool for wood products processing. The quality of cemented carbide milling cutter is closely related to the quality of processed products. The correct and reasonable selection of cemented carbide milling cutter is of great significance to improve product quality, shorten machining cycle and reduce machining cost. Alloy milling cutter has many advantages, but due to the poor toughness of cemented carbide itself compared with high-speed steel, it is easy to collapse when the cutting process is improperly selected or the precision of machine tool is poor. How to develop strengths and avoid weaknesses and give full play to its advantages? Here is a question of how to use it correctly.

The thinner the alloy milling cutter is, the more sensitive it is to vibration and tensile stress when in use. If there is large radial or axial runout, it is easy to cause damage. Therefore, the milling machine should operate in a good state, that is, the machine tool has high precision, good cutter bar rigidity, stable transmission, constant feed per tooth and sufficient cooling.

Characteristics of alloy milling cutter in cutting process

Milling is a widely used machining method in precision instrument industry. In the cutting process of alloy milling cutter, it has the following characteristics:

1. The cutting part of the alloy milling cutter is composed of one or several cutter teeth, which are distributed on the surface or end face of the rotating body. During cutting, they are discontinuous. Therefore, the cutter teeth bear periodic impact force and are easy to cause the blade tip to collapse.

2. In the cutting process, whether it is forward milling or reverse milling, the chip thickness changes. Therefore, the cutting force in the cutting process also changes, and it is periodic, so it is easy to cause the vibration of the process system.

According to the above characteristics, in order to make milling stable and ensure the normal operation of cutter teeth, reasonable structural parameters and geometric parameters must be selected. The selection of structural parameters and geometric parameters of alloy milling cutter is more complex than other cutters.

How to maintain alloy milling cutter?

1. Check the power and stiffness of the machine tool to ensure that the required milling cutter diameter can be used on the machine tool.

2. The overhang of the tool on the spindle shall be as short as possible to reduce the impact of the milling cutter axis and workpiece position on the impact load.

3. The alloy milling cutter adopts the correct milling cutter pitch suitable for this process to ensure that there are not too many blades meshing with the workpiece at the same time to cause vibration during cutting. On the other hand, when milling narrow workpiece or milling cavity, it is necessary to ensure that there are enough blades meshing with the workpiece.

4. Ensure that the feed rate of each blade is adopted so that the correct cutting effect can be obtained when the chip is thick enough, so as to reduce tool wear. The indexable blade with positive front angle groove is adopted to obtain stable cutting effect and low power.

5. Select the milling cutter diameter suitable for the width of the workpiece.

6. Select the correct main deflection angle.

7. Place the milling cutter correctly.

8. Use cutting fluid only when necessary.

9. Follow tool maintenance and repair rules and monitor tool wear.


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