Transactions of Nanjing University of Aeronautics & Astronautics
Influence of Coolant on Chip Forming in Gun-Drill Based on Fluid-Solid Coupling Method
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Abstract:
Chip shape is one of the important factors that affect the processing quality of the deep hole. The flow field of 17 mm standard gun-drill is simulated by taking the coolant pressure as a single factor variable, and the influence of coolant pressure on chip forming is discussed by combining with experiments in this paper. The results show that at the initial stage of chip forming, the flow of cutting fluid will intensify the lateral crimp of chips, and then affect the crimp radius of the chip and the number of turns of the crimp screw. The lateral crimp degree increases first and then decreases with the increase of coolant pressure, and the crimp degree is the smallest at 3 MPa. In addition, during the chip removal process, the stream shrinking in the flow field is the main influencing factor that drive and force the chip to break again, and their influence on the chip removal and chip breaking is proportional to the coolant pressure.
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Clc Number:
TG713;TH161
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