| 引用本文: | 田诗意,戴秋莲,骆灿彬.高强度铸铁基cBN砂轮修整实验研究[J].材料科学与工艺,2018,26(2):55-62.DOI:10.11951/j.issn.1005-0299.20170179. |
| TIAN Shiyi,DAI Qiulian,LUO Canbin.Experimental study on dressing of high strength ductile iron based cBN grinding wheels[J].Materials Science and Technology,2018,26(2):55-62.DOI:10.11951/j.issn.1005-0299.20170179. |
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| 摘要: |
| 消失模铸造制备的奥-贝球墨铸铁基cBN砂轮具有胎体强度高、胎体对磨粒把持力大等优点, 但也存在着铸造砂轮毛坯尺寸精度不高、磨削层修整余量大、修整较为困难等不足之处.本文针对铸造铸铁基大粒度cBN砂轮毛坯, 分别进行机械修整、电解修整和电解-机械-电解复合修整试验, 探究不同修整方式下的最优工艺参数和修整效率, 以及修整后磨粒的破碎和出刃情况.研究结果表明:采用SiC修整轮修整, 当转速比为+0.3时修整效率最高, 但修整效率随着时间的增加逐渐减小, 修整至120 min才能够达到砂轮的目标精度; 采用电解修整, 砂轮在最优工艺参数下修整30 min后将产生钝化, 电解修整难以继续进行; 采用电解-机械-电解复合修整, 不仅其修整效率比机械修整有所提高, 而且砂轮表面磨粒破碎较少, 磨粒出刃高度较大.
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| 关键词: cBN 砂轮 消失模铸造 修整效率 修整工艺 出刃高度 |
| DOI：10.11951/j.issn.1005-0299.20170179 |
| 分类号:TG74 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51175192). |
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| Experimental study on dressing of high strength ductile iron based cBN grinding wheels |
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TIAN Shiyi,DAI Qiulian,LUO Canbin
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(College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China )
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| Abstract: |
| Austenite-bainite ductile iron based cBN grinding wheels fabricated by Lost Foam Casting (LFC) had advantages of high strength and good grain retention.However, this kind of cBN grinding wheels was difficult to be dressed due totheir large grinding allowance and low dimensional accury.In this paper, different dressing experiments, including mechanical dressing, electrolytic dressing and electrolytic-mechanical-electrolytic dressing, were carried on the ductile iron based cBN grinding wheels with large grain size.The dressing process parameters were optimized.The dressing efficiency, the damage and the protrusion of the cBN grains were also studied.The experiment results indicated that by using SiC roller to dress the wheel, the highest dressing efficiency was obtained for a speed ratio q of +0.3.The dressing efficiency decreased with increase the dressing time.The desired accuracy of the wheel can be achieved after 120 min mechanical dressing.The electrolytic dressing process can be hardly continued when conducted at the optimum process parameters for 30 min due to the inactivating.Compared with mechanical dressing, electrolytic-mechanical-electrolytic dressing method causes a pronounced dressing efficiency, higher protrusion and less damage of cBN grains.
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| Key words: cBN grinding wheels lost foam casting dressing efficiency dressing methods protrusion of BN grains |
