| As a advanced manufacturing technology, HSM techonology has theadvantages of high removal rate, high efficiency and lower cost whichmakes it the main stream of cutting machining. Presently, the researchmethod for HSM techonology are mainly cutting test, mathematicalmodel and FEM. As a lightweight material, high strength aluminiumalloy is widely used in aerospace field because of its high strength, highhardness and easy to high-speed cutting. Based on the FEM, this paper isfocusing on researching the temperature distribution and changingpattern of workpiece, cutting tool and chip, the changing pattern of thecutting force and how the iron scrap is produced when the high strengthaluminium alloy7050-T7451is put under a higher cutting speed.By using solving method of heat-machine coupled field witharge-scale general finite element software Marc, we carry out theresearch how different cutting parameter influence cutting process of7050-T7451by means of changing cutting speed, cutting depth, cutterrake angle, cutter clearance angle, cutter edge radius and frictionfactor. And data analysis software OriginPro8.0is used to drawcurves about how the cutting force and cutting temperature change under different cutting parameter, briefly inflecting the generalpattern.The cause for the7050-T7451chips’ formation and itsmechanization can be concluded by analysing how cutting speed andcutter rake angle influence the production of the chip. The researchstates that strip chip become the wave chip under a higher speed. Andthe chip can have a serious deformation and easy to become the wavechip when the cutter rake angle is small. Parts of shear sliding band’ssliding in the area of stress concentration can cause the wave chip. |
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