聚酰亚胺树脂/立方氮化硼砂轮的制备及其磨削性能
Preparation and Grinding Performance of Polyimide Resin Bonded Cubic Boron Nitride Composite Grinding Wheels
摘 要
对立方氮化硼(CBN)磨粒和聚酰亚胺(PI)树脂进行热压固化成型和后续热处理, 制备了PI树脂/CBN砂轮, 用热重-差示扫描量热分析仪、红外光谱仪、扫描电子显微镜、磨削试验设备及力学性能试验机等研究了PI树脂的固化反应机理、PI树脂/CBN砂轮的制备工艺及磨削性能。结果表明: 试验所用PI树脂的固化反应存在线型与体型聚合两个固化反应放热峰, 峰值分别在140 ℃与235 ℃; PI树脂/CBN砂轮能够精密磨削淬火45钢, 磨削后表面粗糙度达到0.19 μm, 磨削比为775, 在相同磨削条件下比酚醛树脂/CBN砂轮的耐用性更佳。
立方氮化硼
砂轮
精密磨削
polyimide resin
cubic boron nitride (CBN)
grinding wheel
precision grinding
Abstract
A polyimide resin (PI) bonded cubic boron nitride (CBN) abrasive grain grinding wheel was prepared by hot-pressing curing and forming and subsequent thermal treatment. The PI resin curing mechanism, the manufacturing process and grinding performance of the PI resin/CBN wheel were investigated by differential scanning calorimeter and thermogravimetry analysis, infrared spectroscopy, scanning electron microscopy, mechanical property test and grinding experiments. Results show that there were two exothermic peaks of 140 ℃ and 235 ℃ corresponding to chain and a cross-linking polymerization reaction, respectively in the PI resin curing process. Surface roughness of 0.19 μm and grinding ratio of 775 were obtained when the PI resin bonded CBN wheel grinded the hardened steel 45. The PI resin bonded CBN wheel exhibited better durability than the phenolic resin bonded CBN grinding wheel under the same grinding condition.
中图分类号 TB332
所属栏目 材料性能及其应用
基金项目 国家自然科学基金资助项目(51005024)
收稿日期 2012/2/8
修改稿日期 2012/10/7
网络出版日期
作者单位点击查看
备注陈建林(1975-), 男, 湖南浏阳人, 讲师, 博士。
引用该论文: CHEN Jian-lin,WAN Long,CHEN Jian,MAO Cong. Preparation and Grinding Performance of Polyimide Resin Bonded Cubic Boron Nitride Composite Grinding Wheels[J]. Materials for mechancial engineering, 2013, 37(2): 57～61
陈建林,万隆,陈荐,毛聪. 聚酰亚胺树脂/立方氮化硼砂轮的制备及其磨削性能[J]. 机械工程材料, 2013, 37(2): 57～61
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参考文献
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【2】JACKSON M J, DAVIS C J, HITCHINER M P, et al. High-speed grinding with CBN grinding wheel – applications and future technology[J]. Journal of Materials Processing Technology, 2001, 110: 78-88.
【3】LI X P. A free-abrasive machining approach to dressing of resin-bonded CBN grinding wheels[J]. Journal of Materials Processing Technology, 1995, 48: 223-230.
【4】CAI R, ROWE W B. Assessment of vitrified CBN wheels for precision grinding[J]. International Journal of Machine Tools & Manufacture, 2004, 44: 1391-1402.
【5】SUNARTO, YOSHIO I. Creep feed profile grinding of Ni-based superalloys with ultrafine-polycrystalline CBN abrasive grits[J]. Journal of the International Societies for Precision Engineering and Nanotechnology, 2001, 25: 274-283.
【6】YOU H Y, YE P Q, WANG J S, et al. Design and application of CBN shape grinding wheel for gear[J]. International Journal of Machine Tools & Manufacture, 2003, 43: 1269-1277.
【7】万隆, 陈石林, 刘小磐. 超硬材料与工具[M]. 北京: 化学工业出版社, 2006.
【8】HUANG H , YIN L, ZHOU L B . High speed grinding of silicon nitride with resin bond diamond wheels[J]. Journal of Materials Processing Technology, 2003, 141: 329-336.
【9】LUO S Y, LIAO Y S, CHOU C C, et al. Analysis of the wear of a resin-bonded diamond wheel in the grinding tungsten carbide[J]. Journal of Materials Processing Technology, 1997, 69: 289-296.
【10】LUO S Y, LIU Y C, CHOU C C, et al. Performance of powder filled resin-bonded diamond wheels in the vertical dry grinding of tungsten carbide[J]. Journal of Materials Processing Technology, 2001, 118: 329-336.
【11】徐湘涛. 聚酰亚胺树脂结合剂金刚石砂轮的制造与应用简介[J]. 珠宝科技, 2004, 16(6): 16-19.
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