Analysis of Double-layer Eastic Mechanics and Machining Characteristics of Pneumatic Grinding Wheel

doi:10.3969/j.issn.1000-1093.2018.09.019

Abstract

Abstract: The double-layer elastic mechanics theory of pneumatic grinding wheel with softness consolidation abrasives (SCA) is analyzed for improving the finishing of freeform surface of laser hardened mould with high hardness. Under the circular uniformly distributed stress, the ratio factor m of elasticity modulus of abrasives layer to that of rubber layer and the ratio n of abrasives layer thickness to radius of stress are introduced to establish a machining force model and deformation formula of double-layer elastic wheel. And then a double-layers elastic model of wheel is established by using ANSYS, and the machining process is simulated. Stress distribution and deformation rule are given through simulation. In the experiment, the fiber is used to reinforce the inner rubber layer, and the binder is used to hold the abrasive particles. Microcosmic analysis demonstrates the analytical hypothesis of double-layer elastic mechanics. A machining platform is set up. The experimental results show that the freeform surface of laser hardened mould can be efficiently finished by using the pneumatic grinding wheel. The pneumatic grinding wheel with lower factor n can help to decrease R_a for concave surface, and the pneumatic grinding wheel with higher factor n can improve the machining efficiency of convex surface.Key

Key words: pneumaticgrindingwheel, mechanicalproperty, softnessconsolidationabrasive, mould, freeformsurface

CLC Number:

TG74⁺3

ZENG Xi， PAN Ye， ZHANG Li， JI Shi-ming， CHEN Guo-da， HANG Wei. Analysis of Double-layer Eastic Mechanics and Machining Characteristics of Pneumatic Grinding Wheel[J]. Acta Armamentarii, 2018, 39(9): 1811-1819.

References

［1］ Zeng X, Ji S M, Jin M S, et al. Investigation on machining characteristic of pneumatic wheel based on softness consolidation abrasives［J］. International Journal of Precision Engineering & Manufacturing, 2014, 15(10):2031-2039.
［2］ Zeng X, Ji S M, Jin M S, et al. Research on dynamic characteristic of softness consolidation abrasives in machining process［J］. International Journal of Advanced Manufacturing Technology, 2016, 82(5/6/7/8):1115-1125.
［3］肖贵坚, 黄云, 伊浩.面向型面精度一致性的整体叶盘砂带磨削新方法及实验研究［J］. 航空学报, 2016, 37(5): 26-34.
XIAO Gui-jian, HUANG Yun, YI Hao. Experimental research of new belt grinding method for consistency of blisk profile and surface precision［J］. Acta Aeronautica et Astronautica Sinica, 2016, 37(5):26-34.(in Chinese)
［4］黄云, 黄智. 砂带磨削的发展及关键技术［J］. 中国机械工程, 2007, 18(18):2263-2267.
HUANG Yun, HUANG Zhi. Development and key technologies of abrasive belt grinding［J］. China Mechanical Engineering, 2007, 18(18):2263-2267.(in Chinese)
［5］肖贵坚, 黄云, 路勇, 等. 离散型空间焊道CBN砂带当量随行磨削技术［J］. 机械工程学报, 2015, 51(9):191-198.
XIAO Gui-jian, HUANG Yun, LU Yong, et al. Discrete spatial welding machining using equivalent follow CNB belt grinding technology［J］. Journal of Mechanical Engineering, 2015, 51(9): 191-198.(in Chinese)
［6］尹国强, 巩亚东, 温雪龙, 等.新型点磨削砂轮磨削力模型及试验研究［J］. 机械工程学报, 2016, 52(9):193-200.
YIN Guo-qiang, GONG Ya-dong, WEN Xue-long, et al. Modeling and experimental investigations on point grinding force for novel point grinding wheel［J］. Journal of Mechanical Engineering, 2016, 52(9): 193-200.(in Chinese)
［7］高航, 袁和平. 碳纤维复合材料构件干磨削砂轮研制及其加工性能研究［J］. 兵工学报, 2011, 32(2):186-191.
GAO Hang, YUAN He-ping. Development of a wheel for dry grinding of CFRP parts and investigation on its machining perfor- mance［J］. Acta Armamentarii, 2011, 32(2):186-191.(in Chinese)
［8］张学成, 戴一帆, 李圣怡. 磁射流抛光中磁场的分析与设计［J］. 航空精密制造技术, 2006, 42(1):12-15.
ZHANG Xue-cheng, DAI Yi-fan, LI Sheng-yi. Analysis and design of magnetic field for MJP［J］. Aviation Precision Manufacturing Technology, 2006, 42(1):12-15.(in Chinese)
［9］王永强, 尹韶辉, 李叶鹏, 等. 磁流变平整加工中平动对平整度的影响［J］. 机械工程学报, 2017, 53(1):206-214.
WANG Yong-qiang, YIN Shao-hui, LI Ye-peng, et al. Effects of translational movement on surface planarity in magnetorheological planarization process［J］. Journal of Mechanical Engineering, 2017, 53(1):206-214.(in Chinese)

［10］梁志强, 黄迪青, 周天丰，等. 齿轮钢18Gr2Ni4WA磨削烧伤实验及仿真预测研究［J］. 兵工学报, 2017, 38(10):1995-2001.
LIANG Zhi-qiang, HUANG Di-qing, ZHOU Tian-feng, et al. Experiment and simulation prediction of grinding burn of gear steel 18Cr2Ni4WA［J］. Acta Armamentarii, 2017, 38(10):1995-2001.(in Chinese)
［11］ Zeng X, Ji S M, Tan D P, et al. Softness consolidation abrasives material removal characteristic oriented to laser hardening surface［J］. International Journal of Advanced Manufacturing Technology, 2013, 69(9/10/11/12):2323-2332.
［12］王旭. 使用优化的固着磨料磨盘全口径加工碳化硅反射镜［J］. 光学精密工程, 2012, 20(10):2123-2131.
WANG Xu. Fabrication of SiC mirror in full aperture with optimized fixed abrasive polishing pad［J］. Optics and Precision Engineering, 2012, 20(10):2123-2131.(in Chinese)
［13］金明生. 模具自由曲面气囊抛光机理及工艺研究［D］. 杭州: 浙江工业大学, 2009.
JIN Ming-sheng. Gasbag polishing mechanism and process on free-form surface mold［D］. Hangzhou: Zhejiang University of Technology, 2009.(in Chinese)
［14］计时鸣, 金明生, 张宪, 等. 应用于模具自由曲面的新型气囊抛光技术［J］. 机械工程学报, 2007, 43(8):2-6.
JI Shi-ming, JIN Ming-sheng, ZHANG Xian, et al. Novel gasbag polishing technique for free-form mold［J］. Chinese Journal of Mechanical Engineering, 2007, 43(8):2-6.(in Chinese)
［15］计时鸣, 李琛, 谭大鹏, 等. 基于Preston方程的软性磨粒流加工特性［J］. 机械工程学报, 2011, 47(17):156-163.
JI Shi-ming, LI Chen, TAN Da-peng, et al. Study on machinability of softness abrasive flow based on Preston equation ［J］. Journal of Mechanical Engineering, 2011, 47(17):156-163. (in Chinese)
［16］计时鸣, 付有志, 谭大鹏. 软性磨粒流双入口约束流场数值分析及加工试验研究［J］. 机械工程学报, 2012, 48(19):177-185.
JI Shi-ming, FU You-zhi, TAN Da-peng. Numerical analysis and processing experiment of double-inlet restraint flow field in the soft abrasive flow machining［J］. Journal of Mechanical Engineering, 2012, 48(19):177-185.(in Chinese)
［17］石峰, 戴一帆, 彭小强, 等. 高精度光学表面磁流变修形［J］. 光学精密工程, 2009, 18(7):1859-1864.
SHI Feng, DAI Yi-fan, PENG Xiao-qiang, et al. Magnetorheological finishing for high precision optical surface［J］. Optics and Precision Engineering, 2009, 18 (7):1859-1864.(in Chinese)
［18］戴一帆, 石峰, 彭小强, 等. 光学镜面磁流变确定性修形的实现［J］. 光学学报, 2010, 30(1):198-205.
DAI Yi-fan, SHI Feng, PENG Xiao-qiang, et al. Deterministic figuring in optical machining by magnetorheological finishing［J］. Acta Optica Sinica, 2010, 30(1):198-205.(in Chinese)
［19］戴一帆, 张学成, 李圣怡, 等. 确定性磁射流抛光技术［J］. 机械工程学报, 2009, 45(5):171-176.
DAI Yi-fan, ZHANG Xue-cheng, LI Sheng-yi, et al. Determi- nistic magnetorheological jet polishing technology［J］. Journal of Mechanical Engineering, 2009, 45(5):171-176. (in Chinese)
［20］彭小强, 戴一帆, 李圣怡. 磁流变抛光的材料去除数学模型［J］. 机械工程学报,2004, 40(4):67-70.
PENG Xiao-qiang, DAI Yi-fan, LI Sheng-yi. Material removal model of magnetorheological finishing［J］. Chinese Journal of Mechanical Engineering, 2004, 40(4):67-70. (in Chinese)
［21］王凯. 层状弹性体系的力学分析与计算［M］. 北京:科学出版社, 2009.
WANG Kai. Mechanical analysis and calculation of layered elastic system ［M］. Beijing:Science Press, 2009.(in Chinese)
［22］许志鸿. 双层弹性体系在圆形均布水平荷载作用下的应力与位移［J］. 同济大学学报, 1978(4):55-68.
XU Zhi-hong. Stresses and displacements in an elastic two-layer system under horizontal load uniformly distributed on a circular area［J］. Journal of Tongji University, 1978(4):55-68.(in Chinese)
［23］ Zeng X, Li J H, Ji S M, et al. Research on machining characteristic of double-layer elastomer in pneumatic wheel method［J］. International Journal of Advanced Manufacturing Technology, 2017, 92(1/2/3/4):1329-1338.

第39卷
第9期2018 年9月兵工学报ACTA
ARMAMENTARIIVol.39No.9Sep.2018

[1]	KONG Guoqiang, WANG Kang, YU Qiubing, LI Ying, WEI Huazhen, SHAO Meng, BI Weidong, LIU Benxue, YIN Lei, SUN Xiaodong. Properties of Aerogel Modified Quartz Fiber Reinforced Silicone Wave-transparent Composites [J]. Acta Armamentarii, 2022, 43(2): 442-450.
[2]	XIONG Manman, YAN Wenmin, XU Cheng, QIN Bin, MA Xuejiao. Ballistic Damage Characteristics of Cowhide as Skin Surrogate [J]. Acta Armamentarii, 2022, 43(1): 29-36.
[3]	LIU Qiang, CHEN Pengwan, SU Jianjun, LI Zhirong, ZHANG Yulei. Tensile Mechanical Properties and Constitutive Model of SiC/polyurea Nanocomposites [J]. Acta Armamentarii, 2021, 42(6): 1238-1249.
[4]	LI Dongwei， MIAO Feichao， ZHANG Xiangrong， XIONG Guosong， ZHOU Lin， ZHAO Shuangshuang. Dynamic Mechanical Properties of an Insensitive DNAN-based Melt-cast Explosive [J]. Acta Armamentarii, 2021, 42(11): 2344-2349.
[5]	HUANG Junhao, WANG Lin, LIU Xiaopin, XU Xuefeng, LIU Anjin, Tayyeb Ali, ZHOU Zhe, NING Zixuan, YANG Jiabin, ZHANG Binbin, CHENG Xingwang. Mechanical Properties and Ballistic Performance of Ti-6321 Alloy [J]. Acta Armamentarii, 2021, 42(1): 124-132.
[6]	LIANG Jiaxin， WANG Yingchun， CHENG Xingwang， LI Zhuang， LI Shukui. Effect of Thermo-mechanical Treatment on the Microstructure and Mechanical Properties of a Medium Carbon Cr-Ni-W-Mo Steel [J]. Acta Armamentarii, 2020, 41(9): 1904-1912.
[7]	XU Baochi， SHI Bikun， FAN Lixia， YANG Chen， FU Yunfeng, DONG Xuehua. Research on Deformation Inhomogeneity along Wall Thickness Direction of Cold Radial Forged Barrel [J]. Acta Armamentarii, 2020, 41(1): 13-20.
[8]	GUO Ruiqi， REN Huiqi， ZHANG Lei， LONG Zhilin， WU Xiangyun， XU Xiangyun， LI Zebin， HUANG Kui. Research Progress of Large-diameter Split Hopkinson Bar Experimental Technique [J]. Acta Armamentarii, 2019, 40(7): 1518-1536.
[9]	JI Shiming， QIU Wenbin， ZENG Xi， XI Fengfei， QIU Lei， ZHENG Qianqian， SHI Meng. Analysis of Micromechanical Characteristics of Softness Consolidation Abrasives [J]. Acta Armamentarii, 2019, 40(5): 1068-1076.
[10]	GAO Yubo， QIN Guohua, ZHANG Wei， YI Chenhong, DENG Yongjun. Research on Dynamic Compression Properties of TiB₂-B₄C Composite [J]. Acta Armamentarii, 2019, 40(11): 2304-2310.
[11]	HANG Guiyun, YU Wenli, WANG Tao, WANG Jintao, MIAO Shuang. Molecular Dynamics Investigation on Crystal Defect of HMX/NTO Cocrystal Explosive [J]. Acta Armamentarii, 2019, 40(1): 49-57.
[12]	LI Jun-bao, LI Wei-bing, CHENG Wei, WANG Xiao-ming, LI Wen-bin, HONG Xiao-wen. Mechanical Properties and Constitutive Model of Aluminum Powder/Rubber Composites [J]. Acta Armamentarii, 2018, 39(6): 1186-1194.
[13]	CHEN Fu-hua， HU Xiao-qiu， LIU Zhi-tao. Workbench-based Simulation Analysis of Multi-perforated Gun Propellant in Extrusion Process [J]. Acta Armamentarii, 2017, 38(4): 695-703.
[14]	ZHANG Xue-hui， XIE Chen-zhen, LI Xiao-xian， LIU Wei-jiang， YANG Kai， JIANG Miao， ZHU Sheng-jian. Research on Annealing Behaviors of Al₂O₃-Dispersion Strengthened Copper [J]. Acta Armamentarii, 2017, 38(11): 2220-2225.
[15]	CHEN Guo-da， JI Shi-ming， JIN Ming-sheng， ZHANG Cai. Layering Shaping Mould Gasbag Polishing Trajectory Planning Method for Equal Residual Figure Error [J]. Acta Armamentarii, 2012, 33(6): 724-729.