DLC-coated Tools Research Articles

Development of a DLC-Coated Tool with Thin Film Thermocouples

Development of a DLC-Coated Tool with Thin Film Thermocouples

STUDY ON NEAR DRY CUTTING OF ALUMINUM ALLOYS

Series of orthogonal cutting tests of aluminum alloys with different amount of silicon content have been carried out to investigate the chip formation process and adhesion of the work material to the rake face of the cutting tool under near dry cutting conditions. No adhesion is observed when cut with the sintered diamond tool regardless of the amount of the silicon content. On the other hand, the amount of adhesion increases with an increase in the silicon content in the aluminum alloys when cut with the cemented carbide and DLC-coated tools. No adhesion is formed when the nominal coefficient of friction on the rake face is 0.3 or less, and adhesion is formed when the nominal coefficient of friction is 0.4 or more. The amount of adhesion decreases with an increase in the rake angle when cut with the cemented carbide tools and the DLC-coated tool.

Study on Near Dry Machining of Aluminum Alloys

Series of orthogonal cutting tests of aluminum alloys have been carried out to investigate the chip formation process and adhesion of the work material to the rake face of the cutting tool under near dry cutting conditions. Almost no adhesion of the work material was observed over a wide range of cutting speed tested when the aluminum alloy was cut with the sintered diamond cutting tool. On the other hand, large amount of adhesion of the work material was observed at low cutting speeds, when cut with the carbide and DLC-coated tools. The amount of the adhered material is reduced with an increase in the cutting speed. The average coefficient of friction on the rake face increases almost in linear relation with the amount of adhesion. The chemical components of the adhered layer were also analyzed by EDS and AES techniques.

Study on Near Dry Machining of Aluminum Alloys(Advanced machining technology)

Series of orthogonal cutting tests of Aluminum alloys have been carried out to investigate the chip formation process and adhesion of the work material to the rake face of the cutting tool under near dry cutting conditions. Almost no adhesion of the work material was observed over a wide range of cutting speed tested when the Aluminum alloy was cut with the sintered diamond cutting tool. On the other hand, large amount of adhesion of the work material was observed at low cutting speeds, when cut with the carbide and DLC-coated tools. The amount of the adhered material is reduced with an increase in the cutting speed. The nominal coefficient of friction on the rake face increases almost in linear relation with the amount of adhesion. The chemical components of the adhered layer were analyzed by EDS and AES techniques.

The cutting performance of diamond and DLC-coated cutting tools

Abstract Diamond and DLC films were coated on cemented carbide inserts by DC plasma jet CVD and vacuum cathode multi-arc deposition (VCAD), respectively. Cutting experiments were carried out in the digital-control processing center; Al alloy piston production line and aluminum bronze worm gear production line. The results showed that the wear life of diamond and DLC-coated cutting inserts were prolonged by tens of times; the temperature of the cutting insert and cut material has been lowered and the processing quality of the workpiece improved. The diamond and DLC-coated tools have great advantages for processing abrasive materials compared to cemented carbide tools.