The Effect of the Use of Cutting Zone Minimum Quantity Lubrication and Wiper Geometry Inserts on Titanium Ti6Al4V Surface Quality After Turning

Abstract

Due to their poor machinability, the machining of titanium alloys without a machining fluid is practically impossible. One of the fluid feeding methods, which is also eco-friendly, is minimum quantity lubrication (MQL). This paper presents the results of research into the dry and MQLassisted machining of alloy Ti-6Al-4V. In the literature on the subject, there are studies on the influence of MQL on tool life, cutting forces, and the most commonly used roughness parameters Ra and Rz. In this paper, MQL's impact on the values of parameters Rq, Rt, Rp, Rv, Rsk, and Rku is shown. In addition, the possibility of improving the surface quality of the selected titanium alloy using wiper geometry inserts combined with MQL is assessed. The exemplary images of the surface, machined using tools of conventional and wiper geometry, in dry and MQL conditions are also shown. Thanks to the wide range of the measured and analysed roughness parameters the results presented in this paper provide a basis for a comprehensive assessment of the geometric and functional features of the surface of alloy Ti-6Al-4V after dry and MQL-assisted turning.

Study on the Mechanism of Improving Surface Roughness of Gray Cast Iron Machining by Wiper Inserts

“…[13][14][15] The cutting parameters have a significant impact on the wear of the wiper insert, with the cutting speed and feed rate having the greatest impact. [16][17][18][19] Through orthogonal cutting experiments of turning Ti6Al4V [20], wear length increases with feed rate,this is because a higher feed rate means a longer length of cut at the edge of the wiper insertper revolution. Especially for difficult to machine materials, the cutting force is very large, and the relationship between the geometric parameters of cutting tools, cutting parameters, and tool wear is particularly prominent.…”

Drilling of Holes in Aluminum Matrix Composites at Dry and with the Minimum Quantity Lubrication of the Cutting Zone

“…The positive impact was assessed at a level similar to that in the case of flood cooling. Furthermore, surface roughness can be effectively improved during the treatment of the Ti6Al4V alloy by using oil mist [19]. Reduced cutting forces and roughness due to the use of MQL in comparison with dry drilling can be achieved not only when machining light alloys or composites, but also in stainless steels drilling [20].…”