The Cutting Tools Materials for high speed cutting Titanium
Category：News
PublishedDate：2017-09-25
1. The Processing Characteristics of Titanium Alloy
Titanium alloy has high strength, heat resistance and good corrosion resistance and other excellent performance, is widely used in aerospace, marine engineering, military equipment, medical science ect light metal production industry, but because of high temperature chemical activity, Thermal Conductivity Small, low modulus of elasticity, large coefficient of friction, Ti Alloy become a typical difficult to machine material, and also caused many problems of damage seriously, lower the production costs and other issues.
2. High speed cutting technology
High-speed cutting technology (High Speed Cutting, HSC) is a type advanced manufacturing and processing technology with high-performance, high-quality, low-cost in recent years. It is one of the important development directions of metal cutting technology. And because of a series of advantages of this machining type, also with years of researchment, and since the 90's, it has been applied to industrial production. Its processing mechanism has undergone fundamental changes, compared with the traditional cutting, high-speed machining has undergone a substantial leap, the metal removal rate increased by 30% to 40%, cutting force reduced by 30%, the tool Cutting life increased by 70%, the cutting heat significantly reduced, low-level cutting vibration almost disappeared, so that the world's processing industry to obtain more economic and social benefits.
2. The cutting tools for high speed cutting Titanium Alloy
We will analyze the characteristics of different tool materials by comparing the tool life, cutting force and tool wear in the high-speed turning of the carbide tool, the coating tool and the CBN Insert.
(1) Tool life analysis
The tool flank wear varies with the cutting distance. For example, processing Ti26Al24V, both carbide inserts and coating inserts wear seriously and there is no obvious normal wear stage; coating insert will be better than carbide alloy, and CBN Insert Wear belong to normal wear, and has three stages, the tool life is long.
(2) Cutting Force Contrast
The cutting forces of the three tools vary with the cutting distance. When the three kinds of tools are turning, the elastic modulus of titanium alloy is small and the elastic deformation is large, which will lead to the maximum radial force in cutting process. In the cutting process, The cutting force of CBN tool is relatively stable, and reduce. It is caused by the rapid increase of the cutting temperature leading to the materials soften. And the cutting force of the carbide tool and the coating tool varies substantially same. With cutting, the cutting force increase, however the cutting force of the coating tools will be smaller than coated insert, it is the effect of the coating layer.
(3) Research on tool wear characteristics
Both the front and rear flanks of Carbide tool appear obvious plowy abrasive wear, but the tool nose surface wear is different from the other wear pattern that formed when cutting other metal materials, but the razor wear area directly and Cutting edge connected, the wear in the cutting edge wear seriously. This is because when high speed turning titanium alloy, the chip is short, cutting force concentrated in the cutting edge near the high temperature so that the blade softening and deformation, then forming the largest form of slant wear. And it will affect the tool life
3. Conclusion
When with same cutting parameters high speed machining Ti Alloy, the tool life of carbide insert is the lowest, the performance of the CBN Insert is the best. In the whole process, the cutting force of cbn insert is stable. And with more than 10 years experience on superhard cutting tools, Halnn made so many cbn insert grades for machining high hardness materials, such as BN-S20,BN-K1, BNK30,ect. Also have so many grades.
If you have any problems on machining high hardness materials, please feel free to contact with us info@halnntools.com, Whatsapp:+8615617635382.