Numerical Simulation and Experimental Study on the Drilling Process of 7075-t6 Aerospace Aluminum Alloy.

Haitao Luo,Tingke Wu,Jia Fu,Huadong Li,Ning Chen

doi:10.3390/ma14030553

Haitao Luo, Tingke Wu + Show 3 more

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https://doi.org/10.3390/ma14030553

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Abstract

A finite element model for setting drilling conditions is established. The effect of feed speed and spindle speed on the drilling process was studied. In the test phase, drilling tests were conducted using three different feed speeds (60, 100, and 140 mm/min) and three different spindle speeds (800, 1000, and 1200 rpm). The correctness of the finite element model was verified by comparing the experimental and numerical simulation data. The results show that the axial force and torque increase significantly with the increase of feed speed, while the axial force and torque increase less as the spindle speed increases. The numerical simulation results show that the temperature of the cutting edge increases as the feed speed increases. Increasing the rotating speed increases the formation of chip curl. When the working conditions are high rotating speed and low feed, the tool wear is reduced, and the machining quality is better. The numerical simulation results obtained for the chip forming effect are similar to the experimental data. In addition, the simulation results show the generation of burrs. A comparison of the finite element simulation and experimental data leads to an in-depth understanding of the drilling process and ability to optimize subsequent drilling parameters, which provide reliable process parameters and technical guarantees for the successful implementation of drilling technology for space suspended ball structures.

Highlights

The aluminum alloy 7075-t6 is commonly used to manufacture aerospace components.In the connection process of most aerospace components, bolts or partial connections of holes and holes are mostly used
The drilling process was simulated through the establishment of a drilling finite element model, and verified and corrected through experiments
Due to the timeconsuming and high cost of the drilling process test, an accurate establishment of the finite element model will significantly reduce the cost of the experiment and can be applied to the early prediction of the drilling parameters of other materials

Summary

Introduction

The aluminum alloy 7075-t6 is commonly used to manufacture aerospace components. In the connection process of most aerospace components, bolts or partial connections of holes and holes are mostly used. Aerospace components have stringent quality requirements for drilling. The study of the drilling process parameters for the 7075-t6 aluminum alloy will help optimize it and improve drilling quality. The drilling process was simulated through the establishment of a drilling finite element model, and verified and corrected through experiments. Due to the timeconsuming and high cost of the drilling process test, an accurate establishment of the finite element model will significantly reduce the cost of the experiment and can be applied to the early prediction of the drilling parameters of other materials. The finite element analysis method has some unique advantages

Objectives

Results

Conclusion