# The Impact of Drilling Parameters on Drilling Temperature in High-Strength Steel Thin-Walled Parts
## 1 Introduction  
The development of  
## 1 Introduction  
High-strength steel has the characteristics of high yield strength and tensile strength, high hardness, good plasticity, high fracture toughness, low thermal conductivity, etc. ; however, it also faces problems due to its high cutting force and high cutting temperature during the cutting process. With excellent material properties, high-strength steel is widely used in various fields such as aviation [1; 2; 3], aerospace [4; 5; 6], energy [7; 8], automotive [9; 10; 11], shipbuilding [12; 13], industrial manufacturing [14; 15; 16; 17], and construction [18; 19]. Drilling is one of the important processes for thin-walled high-strength steel parts; due to the poor thermal conductivity of high-strength steel, the drilling process is very susceptible to the influence of cutting heat, resulting in residual stress and deformation, which not only affects the machining accuracy and quality of machining, but also affects the service life of the workpiece [16; 20]. Therefore, it is of great importance to study the cutting temperature during the drilling process of thin-walled high-strength steel parts. The primary objective of this study is to characterize the evolution of the temperature field during thin-wall drilling and to establish a quantitative relationship between drilling parameters and these temperature variations. Cutting dosage is the main factor affecting drilling temperature [21; 22]. At present, many scholars have carried out research on the cutting temperature of high-strength steel hole machining. On study [23] conducted drilling experiments on AISI1045 high-strength steel under cooling conditions and measured the drilling temperature using K-type thermocouples, which showed that the drilling temperature increased with the increase in cutting speed, and decreased with the increase in feed. Another study [24] investigated the effects of the drill's point angle, clearance angle, and helix angle on drilling temperature and axial force. The results showed that the helix angle of the drill has the greatest impact on drilling temperature, while the clearance angle has the least impact. This provides new ideas for tool selection. Another study [25] investigated the effect of the drilling dosage on the drilling temperature of 300M high-strength steel through simulation experiments, and the results show that the cutting temperature rises with the increase in spindle speed and feed. One study [26] combined simulation and experimental methods to study the drilling temperature of the AISI4340 high-strength steel drilling process, and the results show that the drilling temperature increases with the increase in spindle speed and feed. Other issues related to drilling of high-strength steel have also been explored in the existing literature: One study [27] proposed a helical milling scheme for hole making in thin Ti6 Al4V titanium alloy plates, which significantly reduced cutting temperature and axial force. Another study [28; 29] disclosed the impacts of vibration and deformation on cutting temperature, tool wear, and other factors during the machining of thin-walled components, as well as technical solutions for controlling vibrations to enhance stability and safety by using dampers with optimal structural dimensions in the machining system. A different study [30] employed a novel drill bit for thermal drilling which was able to significantly reduce axial force, and investigated the influence of spindle speed, feed rate, and workpiece thickness on the axial force during thermal drilling of thin-walled components. Another study [31] explored the hard drilling performance and machined surface integrity of 42 CrMo steel under dry cutting, cold air, and liquid nitrogen (LN2) cooling conditions. The study found that LN2 cooling can significantly reduce cutting forces and temperature, substantially decrease thermal damage, and ensure machining surface quality and tool life.