|
摘要：
|
|
金属塑性成形中的摩擦是一个非常复杂的动态过程,对工件的成形质量影响极大,测量这一动态过程是极端困难的,但是这一动态过程又必须被测量并加以研究。利用声发射技术测量并研究了凸模胀形过程中不同润滑条件下的动态摩擦的全过程,研究结果表明:润滑条件对声发射信号的强弱有明显的影响,随着润滑条件的恶化,声发射信号由弱变强,通过声发射信号的强弱能够判断润滑条件的好坏,利用声发射信号监测金属塑性成形过程中的润滑条件与磨损状态是可行的。
|
|
The friction in the process of metal forming is a very intricate dynamic process.It has a great effect on quality of forming.Measuring the dynamic process is very difficult,but the dynamic process must be measured and studied.The process of dynamic friction under different lubrication conditions in punch bulging wes studied with acoustic emission technology.The result indicates that different states of lubrication produce different signals of acoustic emission and different signals of acoustic emission corresponding with different states of lubrication.It is feasible that the lubrication state can be measured and inspected with acoustic emission signal.
|
|
基金项目：
|
|
国家自然科学基金资助项目(50565002)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]张守茁,朱宝泉,李进春,等.无润滑条件下金属板材凸模胀形过程声发射检测[J].锻压技术,2001,26(3):4143.
[2]Dornfeld D A,Diei E.Acoustic emission fromsi mple upsetting ofsolid Cylinders[J].Eng.Mater.Tech.,1982,104:145 152.
[3]Kenichi,Yoshiola.Source mechanism of acoustic emissiongenerated around the yield point of A Ai-Li-Cu-Mg-Zr alloy[A].Progressin Acoustic Emissionin the Japanese Society farNOT[C].Toky,1988.
[4]王丽君,韩强,赵振铎,等.金属板料成形摩擦机理研究[J].金属成形工艺.2002,(4):8 12.
[5]张彦敏,孙爱学.热挤压加工中的摩擦与润滑问题初步探讨[J].锻压机械,2001,(5):12 13.
[6]黄瑶,王雷刚,胡献国,等.有色金属挤压摩擦学特征研究[J].润滑与密封,2001,(4):44 47.
[7]于燕,赵洪运,宋起峰,等.表面形貌和润滑条件对轿车用国产冷轧板的成形性能影响[J].金属成形工艺,2001,19(1):42 43.
[8]张正修,马新梅,李欠娃.冲压过程中的摩擦与润滑[J].锻压机械,2001,(6):5 8.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
