Abstract
In this paper, the influence of laser assisted turning of hard-to-cut nickel-based superalloy on tool cutting ability was presented. The conducted research involved the machining performance along with tool life of ceramic inserts during turning of heat-resistant alloy under a trade name Waspaloy. The ceramic insert with geometry in accordance with the ISO – RPGX 120700 T01020 were applied during longitudinal turning with laser beam. The investigations has been completed with various cutting conditions such as laser powerP, cutting speedvc, feedfand depth of cutap. In order to determine the relations between the tool wear and cutting time, the tool lifeThas been selected. The increment of tool wear was correlated with the change of vibration signals and the critic points of tool wear was presented. In addition, the shape and form of chip was evaluated based on macroscopic observation and SEM analyses. The conducted research was primarily focused on effective application of ceramic inserts during turning Waspaloy with laser beam and comparison this technology with conventional machining.
Highlights
Mechanical processing of hard-to-cut materials, ex. superalloys and aluminum-ceramic composites is a challenge for cutting tools [1, 2]
Due to located heating and softening of material which resulted in reduction of its durability in cutting zone, lower cutting forces and wear of cutting tools with simultaneously improve of machined surface quality were obtained. [2, 14] Researches in which laser assist was applied to improve machining conditions present that proper selection of parameters, like laser beam power, cutting speed and feed rate, have influence on temperature in the cutting zone [14]
By evaluating the wear increase it was possible to define tool life T for particular test and to correlate values of cutting edge wear with microscopic pictures of chips
Summary
Mechanical processing of hard-to-cut materials, ex. superalloys and aluminum-ceramic composites is a challenge for cutting tools [1, 2]. [2, 14] Researches in which laser assist was applied to improve machining conditions present that proper selection of parameters, like laser beam power, cutting speed and feed rate, have influence on temperature in the cutting zone [14]. Appropriate forming and flow of chip is significant for machining process, selection of proper cutting parameters eliminates generating short and thick chips and decrease cutting forces and mechanical vibrations. It was found that besides reduction of cutting forces, tool wear and improving machined surface quality, during laser assisted machining reduction of chip thickness occur and the tendency to creation segmented chip is significantly lower. Presented research focus on different effects of laser assisted turning of hard-to-cut material (Waspaloy). Analysis of mechanical vibrations during the machining process and characteristics of chip morphology led to define improvement of machining conditions using laser assist
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