弹性磨具磨抛SKD11钢磨损抑制与参数优化研究

吴晓君; 舒骁; 周天择; 贾慧波; 李彦磊; 童鑫

doi:10.13433/j.cnki.1003-8728.20180019

弹性磨具磨抛SKD11钢磨损抑制与参数优化研究

doi: 10.13433/j.cnki.1003-8728.20180019

1.
西安建筑科技大学机电工程学院, 西安 710055

基金项目:

国家自然科学基金项目（51375361）资助

详细信息

作者简介:
吴晓君(1964-),教授,博士生导师,研究方向为机械电子、先进制造系统,wuxiaojun@xauat.edu.cn

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出版历程
- 收稿日期: 2017-08-30
- 刊出日期: 2018-08-05

Study on Wear Inhibition and Parameter Optimization in Polishing of SKD11 Steel by Elastic Abrasive

1.
School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

摘要

摘要: SKD11钢是一种用于军工设备导弹架关键零件的特殊难加工材料，其服役表面需达到镜面级粗糙度，该材料淬火后高硬度特性使传统磨抛方式费时费力。为实现工件表面高效磨抛加工，采用弹性磨具进行曲面磨抛加工实验，建立弹性磨具曲面磨抛模型，研究加工参数对材料去除率和磨具磨损的影响规律，利用田口法和灰色关联分析实现材料去除率、磨耗比和表面粗糙度的多目标参数优化，并通过实验验证优化参数可靠性。结果表明：设定切深和磨具转速是材料去除率和磨具磨损的主要影响参数，在保证磨具寿命前提下设定切深应小于0.3 mm，磨具转速低于9 000 r/min；优化参数组合为粒度#320，磨具转速3 000 r/min，设定切深0.3 mm，进给速度2 mm/min，优化后工件平均表面粗糙度Ra降至0.056 μm，材料去除率提高2.6倍，磨具磨损有所改善。
- 弹性磨具 /
- 曲面磨抛 /
- 材料去除率 /
- 磨耗比 /
- 表面粗糙度 /
- 多目标优化
Abstract: SKD11 steel is a kind of special and difficult-to-cut materials used as key part of a military missile rack, which service surface needs to meet mirror roughness. Traditional grinding and polishing method is time-consuming and laborious due to the high hardness of SKD11 after quenching. For achieving high material removal rate to the workpiece surface, polishing tests on curved workpiece using elastic abrasive were carried out. The polishing model for curved surface polishing by elastic abrasive was established. The effects of the process parameters on the material removal rate(MRR) and abrasive wear were analyzed. A multi-index optimization based on MRR, abrasive wear and surface roughness(Ra) was realized by grey relation analysis and Taguchi method. The results showed that the setting cut depth and grinding speed are the main influencing factors of MRR and abrasive wear. To guarantee the life of the abrasive tool, the setting cut depth should be less than 0.3 mm and the grinding speed is below 9 000 r/min in polishing by elastic abrasive. The optimal parameter combination is the abrasive of #320, grinding speed of 3 000 r/min, setting cut depth of 0.3 mm and feed rate of 2 mm/min. The mean Ra of the workpiece achieves 0.056 μm and MRR increases 2.6 times with an improvement of abrasive wear under the optimized parameters.
- elastic abrasive /
- curved surface polishing /
- material removal rate /
- wear ratio /
- surface roughness /
- multi-index optimization

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