操作机钳口凸齿结构对摩擦因数的影响
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摘要
针对锻造操作机钳口与工件接触面摩擦因数确定困难和缺乏理论研究的问题,依据温度对摩擦因数的影响,分析了操作机夹持工件过程中钳口与工件接触面摩擦因数随温度变化的规律,明确了操作机夹持工件过程的最小摩擦因数,确定了钳口与工件接触表面采用凸齿结构的作用和必要性。结合锻造操作机钳口与工件的接触特点,分析了钳口凸齿与工件的挤压工况,研究了钳口凸齿结构对摩擦阻力的影响,并确定了当量摩擦因数,明确了凸齿结构参数与当量摩擦因数的内在关系,为合理确定钳口与工件接触面摩擦因数和钳口夹持力提供了条件。
For the difficulty in determining the friction factor between forging manipulator jaw and workpiece interface and lacking of theoretical research,based on the influence of temperature on friction factor,the law of friction factor between jaw and workpiece interface changing with temperature in the clamping process of manipulator was analyzed. Then,the minimum friction factor in the clamping process of manipulation was determined,and the function and necessity of using convex tooth structure on the interface between jaw and workpiece were confirmed. Based on the contact features between forging manipulator jaw and workpiece,the extrusion condition of jaw convex tooth and workpiece was analyzed,and the influence of jaw convex tooth structure on friction resistance was studied to determine the equivalent friction factor. Finally,the inner relationship between the convex tooth structure parameter and the equivalent friction factor was researched to facilitate the reasonable results of the fraction factor and the jaw clamping force on the interface between jaw and workpiece.
For the difficulty in determining the friction factor between forging manipulator jaw and workpiece interface and lacking of theoretical research,based on the influence of temperature on friction factor,the law of friction factor between jaw and workpiece interface changing with temperature in the clamping process of manipulator was analyzed. Then,the minimum friction factor in the clamping process of manipulation was determined,and the function and necessity of using convex tooth structure on the interface between jaw and workpiece were confirmed. Based on the contact features between forging manipulator jaw and workpiece,the extrusion condition of jaw convex tooth and workpiece was analyzed,and the influence of jaw convex tooth structure on friction resistance was studied to determine the equivalent friction factor. Finally,the inner relationship between the convex tooth structure parameter and the equivalent friction factor was researched to facilitate the reasonable results of the fraction factor and the jaw clamping force on the interface between jaw and workpiece.
引文
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[9]戎雪玲,杨晋,姜峰.锻造操作机钳口与热工件间摩擦因数的试验研究[J].锻压技术,2016,41(6):100-103.Rong X L,Yang J,Jiang F.The experimental research on the friction coefficient between forging manipulator's jaw and thermal parts[J].Forging&Stamping Technology,2016,41(6):100-103.
[2]杨晋,张文波,姜峰.锻造操作机夹持状态分析与夹力研究[J].四川大学学报:工程科版,2014,46(3):187-192.Yang J,Zhang W B,Jiang F.Analysis of clamping condition and research of clamping force about the forging manipulator[J].Journal of Sichuan University:Engineering Science Edition,2014,46(3):187-192.
[3]孟宪国,冯长儒.锻造操作机钳口夹紧力和夹紧缸能力的计算[J].一重技术,2006,(2):1-3.Meng X G,Feng C R.Jig jaw clamping force and cylinder clamping capacity calculation for forging manipulator[J].CFHI Technology,2006,(2):1-3.
[4]杨文玉.力抓取的接触力建模与可行抓取力分析[J].机械工程学报,2010,46(11):43-48.Yang W Y.Contact force modeling and feasible grasp force analysis of power grasp[J].Journal of Mechanical Engineering,2010,46(11):43-48.
[5]Wang W R,Zhao K,Lin Z Q,et al.Evaluating interactions between the heavy forging process and the assisting manipulator combining FEM simulation and kinematics analysis[J].International Journal of Advanced Manufacturing Technology,2010,48:481-491.
[6]He X M.Effects of manipulator compliant movements on the quality of free forgings based on FEM simulation[J].International Journal of Advanced Manufacturing Technology,2011,56:905-913.
[7]闻邦椿,张义民,鄂中凯,等.机械设计手册[M].5版.北京:机械工业出版社,2010.Wen B C,Zhang Y M,E Z K,et al.Machine Design Handbook[M].Fifth Edition.Beijing:China Machine Press,2010.
[8]温诗铸,黄平.摩擦学原理[M].2版.北京:清华大学出版社,2002.Wen S Z,Huang P.Tribological Principle[M].Second Edition.Beijing:Tsinghua University Press,2002.
[9]戎雪玲,杨晋,姜峰.锻造操作机钳口与热工件间摩擦因数的试验研究[J].锻压技术,2016,41(6):100-103.Rong X L,Yang J,Jiang F.The experimental research on the friction coefficient between forging manipulator's jaw and thermal parts[J].Forging&Stamping Technology,2016,41(6):100-103.