热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2010年
3期
112-115,118
,共5页
汪建敏%龚贵春%石磊%朱先忠
汪建敏%龔貴春%石磊%硃先忠
왕건민%공귀춘%석뢰%주선충
楔横轧%空心轴类件%缩颈%压扁%有限元
楔橫軋%空心軸類件%縮頸%壓扁%有限元
설횡알%공심축류건%축경%압편%유한원
cross wedge rolling%hollow shafts%necking%flat%finite element
基于Deform-3D软件,建立了楔横轧轧制空心轴类件三维刚-塑性有限元模型,研究了空心轴轧制过程中应变变化规律.研究结果表明,不同截面上有着不同的应变分布,并由不均匀的楔入段逐步过渡到较为均匀的展宽段直到基本均匀的自由段.在轴对称截面的外圆上轴向拉应变最大,内孔处径向压应变最大,并用径向应变对比度来反映该环形截面壁厚的变化趋势.通过增大该值,以提高轧坯抵抗缩颈的能力.
基于Deform-3D軟件,建立瞭楔橫軋軋製空心軸類件三維剛-塑性有限元模型,研究瞭空心軸軋製過程中應變變化規律.研究結果錶明,不同截麵上有著不同的應變分佈,併由不均勻的楔入段逐步過渡到較為均勻的展寬段直到基本均勻的自由段.在軸對稱截麵的外圓上軸嚮拉應變最大,內孔處徑嚮壓應變最大,併用徑嚮應變對比度來反映該環形截麵壁厚的變化趨勢.通過增大該值,以提高軋坯牴抗縮頸的能力.
기우Deform-3D연건,건립료설횡알알제공심축류건삼유강-소성유한원모형,연구료공심축알제과정중응변변화규률.연구결과표명,불동절면상유착불동적응변분포,병유불균균적설입단축보과도도교위균균적전관단직도기본균균적자유단.재축대칭절면적외원상축향랍응변최대,내공처경향압응변최대,병용경향응변대비도래반영해배형절면벽후적변화추세.통과증대해치,이제고알배저항축경적능력.
Based on software Deform-3D.a rigid-plastic finite element model for hollow shafts rolled by cross-wedge rolling was established,and the law of strain was researched.The results show that the distribution of strain is different in different cross-sections,the strains ofnodes are non-uniform in knifing zone,but they are more uniform in stretching zone,and almost completely uniform in free ZOlle.In the axisymmetric section,the axial strain in excircle iS maximum.but themaximum radial strain iS in inner bore.and the radial strain contrast is used to reflect the variation trend ofwall thicknessin this ring section.Through increasing the value ofradial strain contrast,the anti-necking ability is improved.