Study on Flow Field in Hydrodynamic Suspension Machining with Deflector

Abstract

Abstract:

In order to improve the low processing efficiency in hydrodynamic suspension machining, a method was proposed, which was based on a deflector module that can alter the flow field in hydrodynamic suspension machining. The dynamic model of hydrodynamic suspension machining with deflector was established,which was based on theory of hydrodynamic pressure and realizable k-ε turbulent model. The value of hydrodynamic pressure and speed are both larger than hydrodynamic suspension machining without deflector and are increased 5.04% and 1% respectively. The pressure and velocity willbe generated to a peak in the minimum clearance region and can be increased by rotation speed. The experimental results show that the roughness of workpieces surface drops to 0.018μm under the speed of 6500r/min after 90 minutes polishing and gets a relatively ideal processing effect.

Key words: deflector, hydrodynamic suspension, numerical simulation, hydrodynamic pressure, rotation speed

摘要：

为提高液流悬浮加工的效率，提出一种应用导流模块来改变悬浮液流场特性的液流悬浮加工方法。基于流体动压理论和可实现的k-ε湍流理论，建立导流式液流悬浮加工的动力学模型。研究发现,该加工方法的压力、速度参数在数值上与传统液流悬浮加工方法相比分别提高了5.04%和1%，且流体动压力和流体速度的大小与转速成正比，其流体动压力及速度最大值均出现在加工区最小间隙处。实验结果表明：当转速达到6500r/min时，工件加工区表面在加工90min后粗糙度值降至0.018μm，可得到比较理想的加工效果。

关键词: 导流, 液流悬浮, 数值模拟, 动压力, 转速


CLC Number:

TG580

JI Shi-Ming, HE Jian-Min, HONG,TAO,WU Jia-Feng. Study on Flow Field in Hydrodynamic Suspension Machining with Deflector[J]. China Mechanical Engineering, 2012, 23(12): 1417-1422.

计时鸣, 何剑敏, 洪, 滔, 於加峰. 导流式液流悬浮加工流场特性研究[J]. 中国机械工程, 2012, 23(12): 1417-1422.

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