What Are Factors Affecting The Wear Resistance Of CNC Tools?

2022.6.17

At present, the economic environment is sluggish, the industry competition is becoming more and more fierce, the profit space is becoming smaller and smaller, and all major industries have entered a period of low profits. Perhaps in the mold industry, the wear resistance of CNC tools is also one of the concerns of the management of major companies. What are the factors that affect the wear resistance of CNC tools?

 

Factors Affecting The Wear Resistance Of CNC Tools

1. Tool material

Tool material is the most fundamental factor to determine the cutting performance of tools, which has a great impact on machining efficiency, machining quality, machining cost and tool durability. The harder the tool material is, the better its wear resistance is. The higher the hardness is, the lower the impact toughness is, and the easier it is to collapse. Hardness and toughness are contradictory, which is also a key problem that tool manufacturers should solve. How to balance hardness and toughness has always been a subject of painstaking research for major manufacturers.

 

2. Tool geometry angle

The proper geometric angle of the tool can help to reduce the vibration of the tool, and the tool is not easy to break.

 

3. Groove shape of tool

Choosing a suitable groove shape helps to improve the wear resistance of the cutting tool. Now the general model in the market is the one with points. This blade is suitable for machine tools with better machine performance. If the performance of the machine tool is poor, it will be better to choose a tool with a large angle of arc shape. This kind of tool is sharp, and it is also suitable for machining stainless steel.

 

4. Tool coating

Coated tools have the characteristics of high surface hardness, good wear resistance, stable chemical properties, heat and oxidation resistance, small friction coefficient and low thermal conductivity. During cutting, compared with uncoated tools, coated tools can increase tool life by more than 3~5 times, increase cutting speed by 20%~70%, improve machining accuracy by 0.5~1 level, and reduce tool consumption by 20%~50%.

However, different substrates are suitable for different coatings, some are suitable for physical coatings, and some are suitable for chemical coatings. The application range of physical coatings is wider than that of chemical coatings.

 

5. Tool edge strengthening

The passivation of cutting edge is a very important problem which has not been paid much attention by people. The cutting edge of cemented carbide tools grinded with diamond grinding wheel has micro notches with different degrees.

Before coating, the blade must be sandblasted to ensure the firmness and service life of the coating. The purpose of tool sandblasting is to solve the problem of micro notch of the tool edge after grinding, reduce its sharpness, and achieve the purpose of smoothness, firmness and durability.

 

6. Processing parameters set by the operator

The higher the speed, the shorter the service life of the tool, but the product will have a better finish.