中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2012年
2期
225-228
,共4页
庄百亮%单忠德%姜超%戎文娟
莊百亮%單忠德%薑超%戎文娟
장백량%단충덕%강초%융문연
热成形%防撞梁%数值模拟%模型
熱成形%防撞樑%數值模擬%模型
열성형%방당량%수치모의%모형
hot stamping%anti-- collision beam%numerical simulation%model
采用数值模拟与试验相结合的方法研究了防撞梁热冲压成形工艺。根据BR1500HS材料特性，通过数值模拟优化工艺参数，建立了冲压力与初始成形温度和冲压速度的关系模型，指出了冲压力变化趋势，并通过防撞梁热冲压试验验证了冲压力模型的可靠性。零件性能测试结果显示，热冲压件的厚度和硬度分布较为均匀：平均硬度为47．6HRC，最大减薄率为17％，零件抗拉强度达到1545MPa，最大残余应力只有抗拉强度的20％左右，回弹较小，组织为均匀板条状马氏体。
採用數值模擬與試驗相結閤的方法研究瞭防撞樑熱遲壓成形工藝。根據BR1500HS材料特性，通過數值模擬優化工藝參數，建立瞭遲壓力與初始成形溫度和遲壓速度的關繫模型，指齣瞭遲壓力變化趨勢，併通過防撞樑熱遲壓試驗驗證瞭遲壓力模型的可靠性。零件性能測試結果顯示，熱遲壓件的厚度和硬度分佈較為均勻：平均硬度為47．6HRC，最大減薄率為17％，零件抗拉彊度達到1545MPa，最大殘餘應力隻有抗拉彊度的20％左右，迴彈較小，組織為均勻闆條狀馬氏體。
채용수치모의여시험상결합적방법연구료방당량열충압성형공예。근거BR1500HS재료특성，통과수치모의우화공예삼수，건립료충압력여초시성형온도화충압속도적관계모형，지출료충압력변화추세，병통과방당량열충압시험험증료충압력모형적가고성。령건성능측시결과현시，열충압건적후도화경도분포교위균균：평균경도위47．6HRC，최대감박솔위17％，령건항랍강도체도1545MPa，최대잔여응력지유항랍강도적20％좌우，회탄교소，조직위균균판조상마씨체。
Ultra--high--strength--steel hot stamping process of automotive anti--collision beam combining with numerical simulation and experiments were completed were completed. Through ana- lyzing the properties of the material BR1500HS, process parameters were optimized and a relational model among forming force, initial deformation temperature and pressing speed was built with the help of computer simulation as example of door beam,and the variation trend of forming ~orce was al- so shown clearly. The mechanical property testing shows that the hardness and thickness distribution of formed parts are uniformity; the average hardness is 47.6HRC and the largest thinning ratio is 17%, tensile strength of formed parts achieves 1545MPa which is 5 times as the maximum residual stress with little spring--back, and that microstructure of lath martensite is homogenous.
