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What are the reasons for the fast wear of Special Carbide Cutting Tools for machining
 Aug 07, 2020|View:1389

What are the reasons for the fast wear of Special Carbide Cutting Tools for machining

The development of modern science and technology has continuously allowed the development of CNC machining equipment, while also greatly promoting the progress of cutting technology. With the continuous improvement of production technology requirements and the continuous approach of automation trends, tool materials have begun to change, and special carbide cutting tools composed of new materials such as titanium alloy, carbon fiber composite materials, and super heat-resistant alloys continue to appear, which continuously improves the quality of tools. The key factors such as the reliability, accuracy and life of the tool have also been developed and improved by leaps and bounds.

What are the reasons for the fast wear of Special Carbide Cutting Tools for machining

1. Tool wear form

In machining, the tool wears out after a period of use, and the specific manifestations of wear mainly have the following three forms:

1. Losses under mechanical action, such as abrasive wear or chipping;

2. Bonding and diffusion caused by high heat generated during cutting;

3. Softening and melting of the cutting edge caused by chemical raw material infestation.

Next, we analyze the causes of these three forms of loss one by one:

(1) Causes of wear under mechanical action

When cutting difficult-to-machine materials, tool wear is very easy to occur. This is because most difficult-to-machine materials have the characteristics of low thermal conductivity. This feature will affect the high temperature of the adhesive in the tool material. The bonding strength in the state decreases, thereby accelerating tool wear.

(2) Wear caused by high tool temperature

When cutting high-toughness and high-hardness materials, the temperature of the cutting edge of the tool will generally be higher, which will cause the tool to wear. Especially when cutting short-chip waste workpieces, crescent wear appears near the cutting edge, making the tool wear in a very short time.

(3) Abrasion caused by chemical raw materials

For the tool, some special components in its constituent materials will have a wonderful chemical reaction with the components of the processing material under certain circumstances, causing the tool coating to fall off or even turn into other chemicals. The occurrence of this phenomenon will accelerate the tool The occurrence of chipping, wear, etc.

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