Experimental Studies on Durability of PVD-Based CrCN/CrN-Coated Cutting Blade of Planer Knives Used in the Pine Wood Planing Process

Abstract

The condition of the cutting tool is one of the most important factors as it directly affects the technological and economic efficiencies of the woodworking process. The large variety of raw materials of wood combined with possible impurities and inclusion of solids puts high demands on planing machines. One of the methods to modify their operational properties is to apply antiwear coating on their working surfaces using vacuum deposition methods, such as physical vapor deposition (PVD). The use of such coatings reduces the adhesion of planing products to the surface of industrial planer knives, reduces the friction between the cutting tool and the workpiece, and limits the penetration of heat into the tool, thereby contributing to extending its effective working life. This study examines the impact of PVD-based CrCN/CrN coating on the operational durability and intensity of wear of planer knives operating in production conditions compared to unmodified knives (typically used in the wood processing industry for pine wood planing). For the unmodified and CrCN/CrN-coated planing blades (before and after processing), detailed analyses were carried out. These analyses included determining the rounding radius and profile along the blade (worn edge displacement), calculating surface texture parameters of the rake face of planer knives, and carrying out visual microscopic analysis of its condition. The results of the experiments indicated an increase in durability of up to 142% for the CrCN/CrN-coated tools. It was also found that the use of PVD-based modified industrial planer knives turned out to be more beneficial in each analyzed area of analysis.

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

“…However, this method also allows producing reflective coatings, e.g., Nb 2 O 5 /SiO 2 coating, with a hardness even lower than 1 GPa [12]. Coatings of high hardness are mainly used 2 of 34 for anti-wear applications, as protective coatings for tools and knives [13,14], and for anti-erosion applications [15][16][17]. For that reason, resistance to sliding wear [10,18], tribological properties [19], fracture toughness [16,20], fatigue toughness [6,21], solid particle erosion resistance [22,23] as well as cavitation erosion resistance [24,25] have been deeply investigated.…”

Effect of the Drying Method of Pine and Beech Wood on Fracture Toughness and Shear Yield Stress

“…An accurate forecasting of the power demand for the cutting of wood allows optimal choice of the process configuration, including the number of saws and their spacing in frame saws, multi-circulars saws or tandem band saws. This ensures an effective use of machines as well as prevents overloading that can result in the damage of tools or other losses associated with long downtime in the manufacturing process [32][33][34].…”

The Role of Observation–Measurement Methods in the Surface Characterization of X39Cr13 Stainless-Steel Cutting Blades Used in the Fish Processing Industry

“…In the carried out experimental studies, such an analysis was realized on all planar cutting blades obtained from the automatic skinning machine Steen ST600 after the technological process. Measurement data for analysis were obtained using a multisensory optical profilometer Talysurf CLI2000 (Taylor-Hobson, Leicester, Great Britain) equipped with a laser triangulation sensor LK-031 (Keyence Corp., Osaka, Japan) [ 34 , 35 ].…”

“…The conditions under which the measurements were performed are given at the bottom of the Figure 6a. optical profilometer Talysurf CLI2000 (Taylor-Hobson, Leicester, Great Britain) equipped with a laser triangulation sensor LK-031 (Keyence Corp., Osaka, Japan) [34,35]. Figure 6 presents example analyses prepared in TalyMap Silver 4.1 software using Mountains Technology ® (Digital Surf, Besançon, France) for two planar cutting blades.…”