磁性磨料和磨粒相粒径对磁力研磨效率的影响
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摘要
按照逐级研磨思路,采用目数和磨粒相直径不同的磁性磨料(MAP)对304不锈钢进行磁力研磨光整加工(MAF),工艺条件为:磁极转速1 000 r/min,加工间隙2 mm,磁感应强度1.2 T,磨料填充量2 g。依次采用磨料目数与磨粒相粒径为50~80目/W40、80~120目/W40、120~200目/W7、200~300目/W7的磁性磨料研磨工件2、2、3和5 min(总研磨时间为12 min),工件表面粗糙度由初始的0.646μm降至0.021μm,材料去除量为42.3 mg。而采用200~300目、磨粒相粒径为W7的单一磁性磨料研磨工件时,要降至相同的表面粗糙度耗时30 min。因此,合理选用不同规格的磁性磨料对工件进行逐级研磨能大幅提升研磨效率,使工件表面质量在短时间内就得到明显改善。
Magnetic abrasive finishing(MAF) of 304 stainless steel was conducted using magnetic abrasive particles(MAP)with different mesh number and core sizes based on the ideas of stepwise grinding under the following conditions: rotation rate of magnetic pole 1 000 r/min, magnetic induction 1.2 T, machining gap 2 mm, and abrasive amount 2 g. After being ground with magnetic abrasive with mesh number and core size of 50-80 mesh/W40, 80-120 mesh/W40, 120-200 mesh/W7,and 200-300 mesh/W7 step by step for 2, 2, 3, and 5 min respectively(total time 12 min), the surface roughness of workpiece was reduced from 0.646 μm initially to 0.021 μm finally, and the material removal was 42.3 mg. While it took 30 min for grinding with single 200-300 mesh/W7 MAP to the same roughness. Using different specifications of MAP suitably step by step improves the grinding efficiency and the surface quality of workpiece in a short time.
Magnetic abrasive finishing(MAF) of 304 stainless steel was conducted using magnetic abrasive particles(MAP)with different mesh number and core sizes based on the ideas of stepwise grinding under the following conditions: rotation rate of magnetic pole 1 000 r/min, magnetic induction 1.2 T, machining gap 2 mm, and abrasive amount 2 g. After being ground with magnetic abrasive with mesh number and core size of 50-80 mesh/W40, 80-120 mesh/W40, 120-200 mesh/W7,and 200-300 mesh/W7 step by step for 2, 2, 3, and 5 min respectively(total time 12 min), the surface roughness of workpiece was reduced from 0.646 μm initially to 0.021 μm finally, and the material removal was 42.3 mg. While it took 30 min for grinding with single 200-300 mesh/W7 MAP to the same roughness. Using different specifications of MAP suitably step by step improves the grinding efficiency and the surface quality of workpiece in a short time.
引文
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[10]肖阳,孙友松,陈光忠.永磁场磁力研磨TC11钛合金的实验研究[J].表面技术, 2017, 46(2):229-234.
[11]吴昊,张桂香.研磨液对440c不锈钢磁力研磨效果的影响[J].电镀与涂饰, 2015, 34(3):121-124.
[12]LI W H, LI X H, YANG S Q, et al. A newly developed media for magnetic abrasive finishing process:material removal behavior and finishing performance[J].Journal of Materials Processing Technology, 2018, 260:20-29.
[13]焦安源,全洪军,陈燕,等.超声磁力复合研磨钛合金锥孔的试验研究[J].机械工程学报, 2017, 53(19):114-119.
[14]刘文祎,张桂香,张萍萍.永磁场磁力研磨316L不锈钢实验研究[J].制造技术与机床, 2013(3):116-120.
[2]陈春增,张桂香,赵玉刚.磁力研磨对Inconel718合金表面质量的影响[J].电镀与涂饰, 2016, 35(1):23-27.
[3]ZHANG G X, ZHAO Y G, ZHAO D B, et al. Preparation of white alumina spherical composite magnetic abrasive by gas atomization and rapid solidification[J].Scripta Materialia, 2011, 65(5):416-419.
[4]HOUSHI M N. A comprehensive review on magnetic abrasive finishing process[J]. Advanced Engineering Forum, 2016, 18:1-20.
[5]吴昊,张桂香,赵文聪.磁力研磨对440c不锈钢表面形貌的影响[J].电镀与精饰, 2015, 37(3):16-19.
[6]ZHANG G X, ZHAO Y G, ZHAO D B, et al. New iron-based SiC spherical composite magnetic abrasive for magnetic abrasive finishing[J]. Chinese Journalof Mechanical Engineering, 2013, 26(2):377-383.
[7]KANG J M, YAMAGUCHI H. Internal finishing of capillary tubes by magnetic abrasive finishing using a multiple pole-tip system[J]. Precision Engineering,2012, 36(3):510-516.
[8]KALA P, PANDEY P M, VERMA G C, et al. Understanding flexible abrasive brush behavior for double disk magnetic abrasive finishing based on forcesignature[J]. Journal of Manufacturing Processes, 2017, 28:442-448.
[9]赵文聪,张桂香,董爱梅.磨料对Inconel718镍基高温合金磁力研磨效果的影响[J].电镀与涂饰, 2017, 36(4):203-206.
[10]肖阳,孙友松,陈光忠.永磁场磁力研磨TC11钛合金的实验研究[J].表面技术, 2017, 46(2):229-234.
[11]吴昊,张桂香.研磨液对440c不锈钢磁力研磨效果的影响[J].电镀与涂饰, 2015, 34(3):121-124.
[12]LI W H, LI X H, YANG S Q, et al. A newly developed media for magnetic abrasive finishing process:material removal behavior and finishing performance[J].Journal of Materials Processing Technology, 2018, 260:20-29.
[13]焦安源,全洪军,陈燕,等.超声磁力复合研磨钛合金锥孔的试验研究[J].机械工程学报, 2017, 53(19):114-119.
[14]刘文祎,张桂香,张萍萍.永磁场磁力研磨316L不锈钢实验研究[J].制造技术与机床, 2013(3):116-120.