A Taguchi and experimental investigation into the optimal processing conditions for the abrasive jet polishing of SKD61 mold steel
A Taguchi and experimental investigation into the optimal processing conditions for the abrasive jet polishing of SKD61 mold steel
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DOI：
10.1016/j.ijmachtools.2007.08.019
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发表时间：
2008-06-01
影响因子：
14
通讯作者：
Huang, F. Y.
中科院分区：
文献类型：
--
作者：
Tsai, F. C.;Yan, B. H.;Huang, F. Y.
本研究介绍了一种磨料射流抛光（AJP）技术，在该技术中，气动气流不仅携带磨料颗粒，而且还携带纯水或纯水与一定量的加工油的添加剂。通过田口设计试验，确定了电火花加工的SKD61模型钢试样抛光的最佳AJP参数。然后，利用最佳AJP参数进行了一系列实验试验，以研究添加剂类型、磨料颗粒材料和直径对抛光表面镜面光洁度的影响。田口试验表明，当使用纯水作为添加剂进行抛光时，最佳加工参数为：磨料与添加剂的比例为1:2，冲击角为30度，气体压力为4 kg/cm(2)，喷嘴与工件高度为10 mm，平台转速为200 rpm，平台移动速度为150 mm/s。应用这些工艺参数，发现使用#8000SiC磨料颗粒和水溶剂型机加工油与纯水1:1的混合物抛光效果最佳。实验结果表明，在此条件下，电火花加工SKD61表面的平均粗糙度从初始值R-a = 1.03 μ m （R-max: 7.74 pm）降低到最终值R-a = 0。13 μ m (R-max: 0.90 μ m)，相当于表面粗糙度改善了约87%。(c) 2007 Elsevier Ltd.版权所有。
This study introduces an abrasive jet polishing (AJP) technique in which the pneumatic air stream carries not only abrasive particles, but also an additive of either pure water or pure water with a specified quantity of machining oil. Taguchi design experiments are performed to identify the optimal AJP parameters when applied to the polishing of electrical discharge machined SKD61 mold steel specimens. A series of experimental trials are then conducted using the optimal AJP parameters to investigate the respective effects of the additive type and the abrasive particle material and diameter in achieving a mirror-like finish of the polished surface. The Taguchi trials indicate that when polishing is performed using pure water as an additive, the optimal processing parameters are as follows: an abrasive material to additive ratio of 1:2, an impact angle of 30 degrees, a gas pressure of 4 kg/cm(2), a nozzle-to-workpiece height of 10 mm, a platform rotational velocity of 200 rpm, and a platform travel speed of 150 mm/s. Applying these processing parameters, it is found that the optimal polishing effect is attained using #8000SiC abrasive particles and a 1: 1 mixture of water-solvent machining oil and pure water. The experimental results show that under these conditions, the average roughness of the electrical discharge machined SKD61 surface is reduced from an original value of R-a = 1.03 mu m (R-max: 7.74 pm) to a final value of R-a = 0. 13 mu m (R-max: 0.90 mu m), corresponding to a surface roughness improvement of approximately 87%. (c) 2007 Elsevier Ltd. All rights reserved.