中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
22期
3098-3103
,共6页
径向锻造%锻透性%经验准则%有限元分析
徑嚮鍛造%鍛透性%經驗準則%有限元分析
경향단조%단투성%경험준칙%유한원분석
radial forging%forging penetration efficiency (FPE)%empirical criterion%finite element analysis(FEA)
将轴类锻件径向锻造过程的锤迹投影到单位圆柱面上，分析了径向压下率、轴向送进率等工艺参数应满足的约束条件，推导了判断径向锻造锻透性的经验三角形法则与锻造工艺参数的关系，分析了锻造工艺参数对锻透率的影响；为了验证经验法则的有效性，对轴类锻件径向锻造过程进行了数值模拟，以等效应变应大于临界值以及不出现轴向拉应力作为锻透性的判断准则，分析了工艺参数对锻透率的影响。经验准则计算结果与数值模拟结果的比较表明：采用经验准则能够有效地判断轴类锻件径向锻造过程中的锻透性，其结果偏于安全。
將軸類鍛件徑嚮鍛造過程的錘跡投影到單位圓柱麵上，分析瞭徑嚮壓下率、軸嚮送進率等工藝參數應滿足的約束條件，推導瞭判斷徑嚮鍛造鍛透性的經驗三角形法則與鍛造工藝參數的關繫，分析瞭鍛造工藝參數對鍛透率的影響；為瞭驗證經驗法則的有效性，對軸類鍛件徑嚮鍛造過程進行瞭數值模擬，以等效應變應大于臨界值以及不齣現軸嚮拉應力作為鍛透性的判斷準則，分析瞭工藝參數對鍛透率的影響。經驗準則計算結果與數值模擬結果的比較錶明：採用經驗準則能夠有效地判斷軸類鍛件徑嚮鍛造過程中的鍛透性，其結果偏于安全。
장축류단건경향단조과정적추적투영도단위원주면상，분석료경향압하솔、축향송진솔등공예삼수응만족적약속조건，추도료판단경향단조단투성적경험삼각형법칙여단조공예삼수적관계，분석료단조공예삼수대단투솔적영향；위료험증경험법칙적유효성，대축류단건경향단조과정진행료수치모의，이등효응변응대우림계치이급불출현축향랍응력작위단투성적판단준칙，분석료공예삼수대단투솔적영향。경험준칙계산결과여수치모의결과적비교표명：채용경험준칙능구유효지판단축류단건경향단조과정중적단투성，기결과편우안전。
By projecting the hammer of the radial forging process to a unit cylindrical surface ,con‐straint conditions should be fulfilled by the parameters :radial feed rate and the axial feed rate were ob‐tained after analysis .The relationship among the empirical triangle criterion and the processing param‐eters in radial forging process was derived ,the effects of the parameters on FPE was analyzed .FEA software MSC .Marc/Mentat was used to simulate the radial FPE in radial forging process .Equivalent strain should be larger than the critical value and the axial compressive stress criterion were adopted in the simulation ,and the simulation results were compared with the results of the empirical criterion of FPE prediction .The comparison shows that the empirical method is suitable for radial forging process design .Also ,the calculation results of the process parameters are approximate accurate in estimating the FPE of radial forging process .
