中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2011年
z2期
445-449
,共5页
缩径%界面润滑%薄壁零件%黏性介质成形
縮徑%界麵潤滑%薄壁零件%黏性介質成形
축경%계면윤활%박벽령건%점성개질성형
tube-compression%interface lubrication%thin-walled part%viscous medium forming
利用有限元软件ANSYS/LS-DYNA对薄壁零件黏性介质外压缩径过程中模具与筒坯之间摩擦因数对变形的影响进行有限元分析模拟.结果表明:在缩径过程中筒坯料的变形速度方向与作用在表面的黏性介质的运动方向始终保持一致.模具与筒坯的摩擦因数的临界值是0.2,当小于0.12时,摩擦因数对缩径成形过程的影响较小；当大于0.12时,随着摩擦因数的增大,其对缩径成形过程的影响不断加剧.改善模具与筒坯之间的界面润滑条件有助于缩径成形极限的提高.
利用有限元軟件ANSYS/LS-DYNA對薄壁零件黏性介質外壓縮徑過程中模具與筒坯之間摩抆因數對變形的影響進行有限元分析模擬.結果錶明:在縮徑過程中筒坯料的變形速度方嚮與作用在錶麵的黏性介質的運動方嚮始終保持一緻.模具與筒坯的摩抆因數的臨界值是0.2,噹小于0.12時,摩抆因數對縮徑成形過程的影響較小；噹大于0.12時,隨著摩抆因數的增大,其對縮徑成形過程的影響不斷加劇.改善模具與筒坯之間的界麵潤滑條件有助于縮徑成形極限的提高.
이용유한원연건ANSYS/LS-DYNA대박벽령건점성개질외압축경과정중모구여통배지간마찰인수대변형적영향진행유한원분석모의.결과표명:재축경과정중통배료적변형속도방향여작용재표면적점성개질적운동방향시종보지일치.모구여통배적마찰인수적림계치시0.2,당소우0.12시,마찰인수대축경성형과정적영향교소；당대우0.12시,수착마찰인수적증대,기대축경성형과정적영향불단가극.개선모구여통배지간적계면윤활조건유조우축경성형겁한적제고.
The forming process was simulated numerically by ANSYS/LS-DYNA.The material flowing of tube-blank in the tube-compression process and the effect of the friction coefficient between die and tube-blank on the forming process were analyzed.The research results show that the flowing direction of tube-blank and the flowing direction of viscous mediums are coincident.When the friction coefficient between die and tube-blank is less than 0.12,there is no significant effect on the forming process.When the friction coefficient between die and tube-blank is greater than 0.12,the effect on the forming process is becoming more and more severe constantly with the increase in the friction coefficient between die and tube-blank.Therefore,improving the interface lubrication conditions is beneficial to increasing the forming limit.
