Abstract
The work presents the results of investigation of the influence of anti-wear additive Crodafos EHA-LQ-(MH) added to the emulsion mist on the condition of machined surface of 1.4310 stainless steel after turning. The investigation included the comparison of the following cutting conditions: dry machining, cooling by the MQCL method and cooling by the MQCL method with Crodafos EHA-LQ-(MH). In the paper, the influence of the Anti-Wear (AW) additive on the roughness parameter Ra of the machined surface for various cutting speeds, vc, and mass flow of the emulsion E has been shown. It was found that the MQCL+AW method decreases the Ra parameter values by 14 % to 35 % in comparison with dry cutting and by 17 % in comparison with MQCL method.The machined material and the rake face of the cutting wedge have been subjected to micro X-ray spectroanalysis. Chemical analysis of the cutting wedge and the surface layer of the machined material has been performed. The results show that water dropletts in MQCL method are very good transport facility for active compounds of AW additive that consequently form the dry-film lubricant on the machined surface.
Highlights
The application of cooling fluids and hydraulic oils in the processes of machining is related to the desire of reducing the wear of the cutting tools
Investigation works performed so far have shown that the traditional way of supplying the cooling-lubricating liquid to the cutting zone is unsatisfactory and ineffective [1]
The methods are applied in various machining processes, such as milling, turning, drilling and grinding [3÷7]
Summary
The application of cooling fluids and hydraulic oils in the processes of machining is related to the desire of reducing the wear of the cutting tools. The methods are applied in various machining processes, such as milling, turning, drilling and grinding [3÷7] They result in, among others, reduction of the cutting force [6], temperature in the cutting zone [8], extension of the tool life [8, 9], as well as reduction of the machined surface roughness [8÷12]. The above can be obtained by reducing the expenses related to the use of cooling and lubricating substances with simultaneous formation of a thin anti-friction film in the tool-chip interface [13, 14] This results in deposition of surface active components contained in the modifiers on the surface of the machined material and on the rake face of the cutting tool. The objective of the present work is to determine the influence of the cutting parameters, mass flow of emulsion with AW additive and volume flow of air on the roughness of stainless steel surface of workpiece and on the characteristics of the surface layer of the cutting wedges applied
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