| Popis: |
With the continuous development of the manufacturing industry, the proportion of deep hole machining in mechanical processing is increasing. Demand for deep hole processing of 304 stainless steel is also increasing year by year. At the same time, due to the physical characteristics of 304 stainless steel and the uncontrollability of gun drill in processing, the quality of deep hole processing is relatively poor. The main research of this paper is as follows. Firstly, the stress model of drill bit is established by analyzing the structure of the drill bit. Secondly, a number of single-factor drilling experiments are carried out to control the cutting force in machining process by changing the forward angle of the inner and outer edges of the gun drill. Thirdly, based on the analysis of test results, this paper discusses the influence of the change of inner and outer edge Angle of gun drill on the surface quality of hole wall and the deviation of hole straightness. Finally, the paper studies the chip forming process of gun drill in deep hole machining of 304 stainless steel, and gives the best choice of cutting edge Angle. |
