Tungsten steel milling cutter is a tool made of tungsten steel (hard alloy, also known as tungsten titanium alloy). Generally, it is mainly used for CNC machining centers and CNC engraving machines. It can also be installed on an ordinary milling machine to process some harder and less complex heat-treated materials. Tungsten steel milling cutters are widely used and high-speed processing is used. The hardness of the tungsten steel milling cutter is Vickers 10K, second only to diamond. Because of this, the tungsten steel milling cutter has the characteristics of not being easily worn, and it is brittle and hard not afraid of annealing.
Tungsten steel milling cutters are particularly important for the high temperature resistance and heat resistance of the coating. Due to the high hardness of the coating, high oxidation temperature resistance, and superior tool wear resistance. At the same time, the current tool holder adopts a thermal expansion tool holder with a very high clamping force. Nowadays, thermal expansion tool holders have high runout accuracy and are used in many finishing centers. The strong clamping force and low vibration can also be used for rough machining, so tungsten steel milling cutters that are prone to chipping can also achieve stable machining.
If the tungsten steel milling cutter is abnormally worn or chipped and causes a sharp wear, then it is necessary to select the tool and modify the cutting parameters. In order to increase the strength of the tool, it is also effective to use a negative rake angle shape, and at the same time choose a fine ultrafine cemented carbide material with high hardness. The correction of the cutting conditions is not to reduce the feed rate by a large margin, but to reduce the cutting amount first. In order to maintain the wear resistance of tungsten steel milling and achieve a good machining surface, it is more important to choose high cutting speed than low cutting speed. The cutting amount is reduced in order to achieve stable machining in the case of high-speed milling.
Many people actually don’t know that the service life of tungsten steel milling cutters is closely related to many factors, such as the machining conditions of the machine tool and cutting parameter conditions. Some people think that the harder the tool is, the better. In fact, this understanding is not correct. The harder the tool is not the better, it depends on the hardness of the workpiece and the actual processing conditions. Random cutting during use will not only reduce the processing efficiency, but also affect the service life of the milling cutter.
So What Are The Factors That Affect The Service Life Of Tungsten Steel Milling Cutters?
Factors such as geometric angle, cutting force, cutting heat, and cutting amount will all affect. Therefore, it is very important to master the durability of tungsten steel milling cutters. Only by improving the durability of the cutters can the service life of the milling cutters be prolonged and its effect can be fully exerted. Otherwise, the tool wears prematurely or cuts with a too blunt tool, which does not conform to the principle of more, fast, and economical.
In order to improve the service life of tungsten steel milling cutters, the following aspects should be paid attention to:
(1) Reasonably Choose The Cutting Amount.
The cutting amount affects the durability of the tungsten steel milling cutter. If the cutting depth and feed rate are too large, the cutting force will increase, and the wear of the tungsten steel milling cutter will also accelerate. Therefore, choosing a reasonable cutting amount can also extend the service life of tungsten steel milling cutters.
(2) Improve The Geometric Angle Of The Tungsten Steel Milling Cutter.
The angle and shape of the tungsten steel milling cutter affect the change of cutting force. As the front angle increases, the chip deformation is small, the cutting is light, and the cutting force and cutting heat decrease. On the premise of ensuring sufficient strength of the tungsten steel milling cutter, the rake angle should be as large as possible. When the entering angle is reduced, the length of the cutting edge to participate in the cutting increases, so that the cutting heat is relatively dispersed, and the nose angle increases, which can make cutting Temperature drop.
(3) Grasp And Adjust The Best Cutting Conditions.
Set and maintain good cutting conditions. Understand the cutting status of accessories through vibration analysis, etc., and make adjustments in time, so that the tungsten steel milling cutter has a good working environment. Once the tungsten steel milling cutter is replaced, the size must be adjusted to ensure proper fastener conditions and cutting conditions.
(4) Reasonably Choose The Material Of The Milling Cutter.
The workpiece material and processing conditions have a great influence on the cutting performance of tungsten steel milling cutters. To process different materials, you must know how to choose different tools to meet the requirements of cutting.