Suppressing tool chatter with novel multi-layered nanostructures of carbon based composite coatings

Manufacturing and Characterization of a Carbon-Based Amorphous (a-CNX) Coating Material

“…8 shows that 62% indentation work is due to elastic deformation indicating that the resilient or elastic recovery property of the coating material is higher than that of mild steel and gray cast iron (* 15%) as well as it is comparable to hard rubber [12]. Such kind of resilient property indicates that when the coating material undergoes bending or compressive loading it may exhibit recoverable grain boundary sliding effect instead of plastic flow [12]. The hardness and Young's modulus of amorphous CN X film depend on the rigidity of cross-linking in various hybridized sp 3 and sp 2 carbon bonds [65].…”

“…While most of the research works of carbon nitride films have been focused on studying the mechanical properties such as the hardness, the resilient or elastic recovery behavior and the elastic modulus, very few research works [11][12][13] have been carried out focusing on mechanical vibration damping capacity of thick ([ 100 lm) amorphous carbon nitride coating. Fu et al demonstrated that copper (Cu) inclusion in amorphous carbon nitride matrix can significantly suppress self-excited vibrations such as chatter during turning [11] and milling [12] operations, as well as the copper inclusion can substantially increase dynamic stiffness of the cutting tool during the milling operation [13].…”

“…Fu et al demonstrated that copper (Cu) inclusion in amorphous carbon nitride matrix can significantly suppress self-excited vibrations such as chatter during turning [11] and milling [12] operations, as well as the copper inclusion can substantially increase dynamic stiffness of the cutting tool during the milling operation [13].…”

Thin floor milling using moving support

“…Besides, it lacks exibility since for a different workpiece, the mold support needs to be redesign and reproduce. Sometimes, Coatings, foams or wax were used to replace the mold to strengthen the workpiece [5]. Recently, Kolluru and Axinte [6,7] proposed that use a novel ancillary device to reinforce the whole surface of the workpiece as shown in Fig.…”

Improvement of Milling Stable Processing Condition for a Cutter With Large Ratio of Length to Diameter

“…According to the constrained layer damping beam theory, the different damping toolholders were separately proposed, and were used in boring, milling and turning operations [24]- [26]. Fu et al [27] applied the multilayered nanostructures of carbon on the surface of milling tools to improve the vibration damping, thus increasing the stability limit. Mei et al [28] designed the milling cutters with alternating variable pitches to improve the machining stability.…”