Effect of drilling parameters and tool geometry on drilling performance in drilling carbon fiber–reinforced plastic/titanium alloy stacks

Abstract

An experimental study on drilling of carbon fiber-reinforced plastic/titanium alloy was conducted using three kinds of drills to investigate the cutting process. This research was mainly focused on the drilling forces, drilling temperatures, chips, and delamination area with respect to the cutting parameters and tool geometries. One type of tungsten carbide twist drill and two types of chemical vapor deposition diamond-coated drills which were multi-facet drill and brad spur drill, respectively, were used in this research. The influence of drilling parameters and tool geometries was analyzed and the conclusions were drawn that the proper selection of drilling parameters and drill geometries could lead to better hole quality. Experimental results indicated that the drilling forces and hole quality have a strong connection with feed rate while the impact of cutting speed is small. Research results also showed that the use of multi-facet drill could reduce the delamination greatly and thus produced a better surface integrity. Besides, drilling temperature and titanium alloy chips were studied in this research.

Experimental investigation to optimize tool performance in high-speed drilling: a comparative study

“…5, it is clear that the temperature rise is the highest while drilling the work piece with high-speed steel drill bit tool among three different drill bits, irrespective of machining combination. As expected [13], cutting temperature increased with the elevation of rotational speed in titanium drilling with PVD-coated drill as well, but this tendency is more predominant with HSS drill bit. The reason may be that material removal rate increased significantly with increase in the feed rate which resulted in increased heat generation [14].…”

Fúrószár rezgéseinek mérése lézer doppler módszerrel

“…Bizonyos gépipari ágazatokban (pl. autóipar, repülőgépipar) a gyártási feladatok zömét a fúrás teszik ki [2, 3,4]. Nagy volumenű, nagy értékű alkalmazásoknál tehát, ha már kicsit is sikerül javítani a megmunkálási folyamaton, a gyártási költségekben jelentős csökkentést érhetünk el.…”

Experimental Study of Drilling Temperature, Geometrical Errors and Thermal Expansion of Drill on Hole Accuracy When Drilling CFRP/Ti Alloy Stacks

“…Hole quality in CFRP/Ti alloy stack is characterized by the following respond values in Ti: Surface roughness [ 1 ], hole diameter, geometrical accuracy (roundness) [ 2 ], burr size [ 3 ]; and in CFRP by delamination factor ( F d ) [ 4 , 5 ], thermal destruction, and the damage value ( Q d ) [ 6 ]. In experimental studies the most often measured physical quantities are thrust force ( F , N) [ 1 , 5 ], torque ( M c , Nmm) [ 1 , 5 ], cutting temperature (T, °C) [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ], chip formation mechanism [ 14 , 15 ], and technical quantities such as flank wear [ 16 , 17 , 18 ] and tool life [ 19 ]. The abovementioned quantities are commonly used to explain the physical nature of cutting parameters [ 3 ], the tool geometry [ 20 , 21 ], and tool material, as well as the coolant application effect [ 7 , 22 , 23 , 24 ] on the response values.…”