Abstract:

Aluminum and its alloys are widely used in the production of many products in different industries, especially in the aerospace, space and automotive sectors. Aluminum alloys can be characterized by low density, high corrosion resistance and ductility, high electrical and thermal conductivity, as well as easy workability. The high ductility values of aluminum and its alloys bring with it some difficulties in machining such as high surface roughness values, removal of chips and adhesion to the cutting tool. Drilling is one of the most widely used manufacturing methods in the field of machining. Despite the rapid development of technology and the developing manufacturing methods, drilling continues to be one of the preferred manufacturing methods due to its economy and simplicity. In this study, the 1050-H14 aluminum alloy was subjected to drilling tests in terms of two quality characteristics (cutting force and cutting tool temperature), taking four control factors into account (cutting speed, feed rate, drill bit angle and coating state). The effects of control factors on quality characteristics were modelled by regression analysis, and optimum drilling conditions were tried to be determined by Taguchi method. The variance analysis was made with 95% confidence interval and the effect rates of control factors were calculated. Optimization was also tested by verification experiments. As a result of the experiments, the order of importance of the control factors affecting the cutting force is the feed rate, the drill bit angle, the cutting speed and the coating state. The order of importance of the control factors affecting the cutting tool temperature was found to be cutting speed, drill bit angle, feed rate and coating state, respectively. The optimization performed at the level of 0.05 significance in terms of cutting force and cutting tool temperature was found to be appropriate.

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