Abstract
The milling process is one of the most used processes in the manufacturing industry. Milling, as a process, as evolved, with new machines and methods being employed, in order to obtain the best results consistently. Milling tools have also seen quite an evolution, from the uncoated high-speed steel tool, to the now vastly used, coated tools. Information on the use of these coated tools in recent scientific researches was collected. The coatings that are currently being researched are going to be presented, highlighting some novel advances in the nanocomposite and diamond coatings area, as these coatings are seeing a growing use in the industry, with very satisfactory results, with performance and tool-life increase. Wear mechanism of various types of coatings are also a popular topic on recent research, as the cutting behavior of these coated tools provides valuable information on the tool’s-life. Furthermore, analysis of these mechanisms enables for the selection of the best coating type for the correct application. Recently, the employment of coated tools paired with sustainable lubrication methods as seen some use. As this presents the opportunity to enhance the coated tool’s and the process’s performance, obtaining better results, in terms of better tool-life and better surface finish quality, in a more sustainable fashion.
Highlights
The machining industry has seen a significant growth in the past five to six years, and it is projected to be a $100B industry by 2025 [1]
By achieving a higher tool life and reducing the number of tool replacements that need to be done during a machining process, the overall process price lowers, which makes this topic appealing to the machining industry
As seen in the previous section, the wear mechanisms of the tools give relevant information when it comes to tool life, providing the option to optimize the process in order to obtain a higher tool life, or a better-quality product [58]
Summary
The machining industry has seen a significant growth in the past five to six years, and it is projected to be a $100B industry by 2025 [1] This is primarily due to the growing demand for higher-quality products and computer numerical control (CNC) machines, that enable manufacturers to develop these high-quality and high-complexity products at higher speeds. The tools for milling operation, can be solid, coated or uncoated, or they can have tool inserts along the cutting edges. These coated tools are considered a necessity on most machining applications They contribute to the overall process productivity, increasing tool-life and the production quality of the machined pieces. Coated tools are a must, when machining materials that have low machinability [4,5]
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