摘要
The effect of mandrel with the structure of ball and socket on the cross section quality of thin-walled tube numerical controlled(NC) bending was studied by numerical simulation method, combined with theoretical (analysis) and experiment. Influencing factors of the mandrel include the count of mandrel heads, the diameter of mandrel and its position. According to the principle of NC tube bending, quality defects possibly produced in thin-walled tube NC bending process were analyzed and two parameters were proposed in order to describe the cross section quality of thin-walled tube NC bending. According to the geometrical dimension of tube and dies, the range of mandrel protrusion was derived. The finite element model of thin-walled tube NC bending was established based on the DYNAFORM platform, and key technological problems were solved. The model was verified by experiment. The effect of the number of mandrel heads, the diameter of mandrel and the protrusion length of mandrel on the cross section quality of thin-walled tube NC bending was revealed and how to choose mandrel parameters was presented.
The effect of mandrel with the structure of ball and socket on the cross section quality of thin-walled tube numerical controlled （NC） bending was studied by numerical simulation method, combined with theoretical analysis and experiment. Influencing factors of the mandrel include the count of mandrel heads, the diameter of mandrel and its position. According to the principle of NC tube bending, quality defects possibly produced in thinwalled tube NC bending process were analyzed and two parameters were proposed in order to describe the cross section quality of thin-walled tube NC bending. According to the geometrical dimension of tube and dies, the range of mandrel protrusion was derived. The finite element model of thin-walled tube NC bending was established based on the DYNAFORM platform, and key technological problems were solved. The model was verified by experiment. The effect of the number of mandrel heads, the diameter of mandrel and the protrusion length of mandrel on the cross section quality of thin-walled tube NC bending was revealed and how to choose mandrel parameters was presented.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2005年第6期1264-1274,共11页
Transactions of Nonferrous Metals Society of China
基金
Project(50225518)supportedbytheNationalScienceFoundationofChinaforDistinguishedYoungScholars
Projects(50175092
59975076)supportedbytheNationalNaturalScienceFoundationofChina
ProjectsupportedbytheTeachingandResearchAwardProgramforOutstandingYoungTeachersinHigherEducationInstitutionsofMOE,China
Project(04H53057)supportedbytheAeronauticalScienceFoundationofChina
Project(20020699002)supportedbytheSpecializedResearchFundfortheDoctoralProgramofHigherEducationandprojectsupportedbytheGraduateStartingSeedFundofNorthwesternPolytechnicalUniversity
关键词
芯棒
数控弯曲
薄壁管
横截面质量
thin-walled tube
numerical controlled（NC） tube bending
mandrel
cross section quality, simulation
