Research on the influencing factors of chip forming in 304 stainless steel deep hole gun drilling

Abstract In deep hole gun drilling, the relationship between process parameters and chip forming process has always been a difficult point in the research of deep hole machining because of the small hole diameter, long hole depth, and narrow chip removal space.304 stainless steel has good corrosion and heat resistance and is widely used in medical treatment, food processing, and other fields. However, it also has processing difficulties, such as high hardness and poor plasticity. Therefore, this paper takes 304 stainless steel as the research object, with the help of Abaqus simulation software, simulates the chip forming process in the process of deep hole gun drilling and studies the influence of process parameters on chip forming. According to the simulation results, based on the fluid-solid coupling theory, the fluid-solid coupling simulation model is established through Ansys-Fluent simulation software. The influence of coolant pressure on chip forming is studied, and the relationship between coolant pressure and chip curling deformation is expounded in different growth periods of chips. Then, the deep hole gun drilling test was carried out, and the chip morphology was analyzed. Finally, the paper revealed the relationship between chip forming and process parameters in deep-hole gun drilling.