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用淬火过程的数值模拟方法,结合FLUENT和ANSYS软件的优势,从流体力学的角度提出减少薄壁壳体淬火畸变的工艺措施。结果表明,改进淬火夹具结构,将底板上导流孔的分布与工件放置位置结合起来,并在底板上放置工件的中心位置增设大孔,提高壳体下部的对流换热效率,使工件外表面淬火畸变减小约24.4%;淬火装夹方法采用悬挂方式时,工件淬火过程的温度分布更加均匀,工件外表面淬火畸变减小约33.4%。采用改进淬火夹具结构来减少淬火畸变的工艺措施更符合生产实际情况。
With the numerical simulation method of quenching process, combined with the advantages of FLUENT and ANSYS software, the technological measures to reduce the quench distortion of thin-walled shell are proposed from the perspective of fluid mechanics. The results show that the structure of the quenching fixture is improved, the distribution of the guide holes in the bottom plate and the workpiece placement position are combined, and the large holes are additionally arranged in the central position of the workpiece placed on the bottom plate to improve the convection heat transfer efficiency in the lower part of the shell so that the outer surface The quenching distortion is reduced by about 24.4%. When the hanging method is adopted for the method of hardening clamping, the temperature distribution of the workpiece during quenching process is more uniform, and the quenching distortion on the outer surface of the workpiece is reduced by about 33.4%. The use of improved quenching fixture structure to reduce quenching distortion process more in line with the production of the actual situation.