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CNC carbide inserts / carbide tips

CNC carbide inserts / carbide tips


CNC inserts are a general term for indexable turning inserts, which are the mainstream products in modern metal cutting applications. Mainly used in metal turning, milling, grooving, thread turning and other fields.


There are five types of CNC inserts: integral, inlaid, damped and special.


CNC inserts are a general term for indexable turning inserts, which are the mainstream products in modern metal cutting applications. Mainly used in metal turning, milling, grooving, thread turning and other fields. According to the material, it can be divided into coated inserts, cermet inserts, non-metal ceramic inserts, carbide inserts, superhard inserts, etc. It is characterized by high efficiency, high wear resistance, and the efficiency is more than 4 times higher than that of traditional welded Inserts and alloy Inserts. With the continuous advancement of coating technology, breakthroughs in key technologies such as wear resistance and high temperature resistance will further improve efficiency and reduce processing costs.


species


There are a wide variety of CNC inserts and a wide range of applications. Merchants who buy CNC Inserts in the market mainly recycle the following types of Inserts:


1. Integral type: It is made of a whole piece of material, and the cutting part can be ground into the desired shape according to different purposes.


2. Inlaid type: divided into welding type and machine clip type. The type of clamp depends on the construction of the cutter body. Can be divided into non-indexable and indexable two


3. DNMG Insert Vibration absorption type: When the ratio of the working arm length to the tool diameter is greater than 4, in order to reduce the tool vibration and improve the machining accuracy, a special structure tool is used. Mainly used for boredom.


4. The cutting coolant of the internal cooling tool is transmitted to the inside of the tool body through the spindle or the cutter head of the machine tool, and is sprayed onto the cutting edge from the nozzle hole.


5. Special types: including strong clamping, reversible tapping, compound tools, etc. At present, CNC tools mainly use machine-clamped indexable tools


main cause of wear


Wear of CNC inserts, abrasive wear, chips or some tiny hard spots on the surface of the workpiece (such as carbides, oxides, etc.) WCMT Insert and impurities (such as sand, oxide scale, etc.) A mechanical wear caused by groove surfaces. It is the most important cause of wear for HSS tools (such as broaches, dies, taps, etc.) that are expected to have low rotational speeds and low cutting temperatures.


Adhesive wear Under the action of positive pressure and cutting temperature, a new surface contact is formed between the flank of the CNC insert and the workpiece surface, and the rake surface of the CNC insert and the chip. Adsorption and bonding occur when the interface reaches the distance between atoms. The vertical section is gradually cut and torn by the workpiece or chips, and the surface of the CNC blade produces adhesive wear. Binder wear is one of the main reasons for the wear of cemented carbide when cutting at medium and low cutting speeds.


Diffusion wear Under high temperature and high pressure, some chemical elements in the CNC blade material and the workpiece material diffuse into each other in a solid state, that is, elements such as Ti, W, Co in the cemented carbide diffuse in the steel, and Fe and C in the workpiece. The diffusion of elements to the CNC inserts results in a decrease in the hardness and strength of the inserts, an increase in brittleness, and an increase in tool wear. This is diffusion wear. Diffusion wear is one of the main reasons for the cutting wear of cemented carbide tools at early high temperatures (800-900 °C).


Generally, the diffusion rate of W and Co is faster than that of Ti and Ta, so the high-temperature cutting performance of YT-type cemented carbide is better than that of YG-type. Phase transformation wear When cutting with high-speed steel tools, when the cutting temperature exceeds its phase transformation temperature (550 ~ 600 ℃), the metallographic structure of the CNC blade will change, thereby reducing the hardness and accelerating the wear. Therefore, phase change wear is one of the main reasons for the wear of high-speed steel CNC inserts. chemical abrasion. At a certain temperature, the medium around the cutting area, such as air, cutting fluid, etc., will form some loose and brittle compounds with the tool material. These compounds are easily cut and the workpiece is scraped off, resulting in wear of the CNC blade.


The high feed milling Insert Blog: http://say-good.blog.jp/
by adriantrum | 2023-10-20 18:19


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