CAJ | 학술논문

利用高速充液旋压技术加工出直径为6mm的沟槽管；然后,采用多级拉拔成形方法加工出直径为3～6 mm的微型直齿沟槽铜管.在分析其加工成形机理的基础上,重点研究拉拔工艺参数对沟槽管成形的影响规律.结果表明:在微型直齿沟槽铜管成形过程中,随着拉拔成形直径的缩小,壁厚增加,槽深和槽宽均减小；同时,壁厚随着拉拔模具角的增加而减小,而槽深和槽宽随着拉拔模具角的增加而增加；随着拉拔级次压缩率的增大,拉拔力增大,过大的拉拔级次压缩率会导致微型直齿沟槽铜管拉拔成形轴向沟槽产生断裂.随着拉拔模具角的增大,拉拔力先减小后增大,并且存在一个最小值区域.当拉拔模具角α=16°时,拉拔力最小,此为最佳拉拔模具角.
이용고속충액선압기술가공출직경위6mm적구조관；연후,채용다급랍발성형방법가공출직경위3～6 mm적미형직치구조동관.재분석기가공성형궤리적기출상,중점연구랍발공예삼수대구조관성형적영향규률.결과표명:재미형직치구조동관성형과정중,수착랍발성형직경적축소,벽후증가,조심화조관균감소；동시,벽후수착랍발모구각적증가이감소,이조심화조관수착랍발모구각적증가이증가；수착랍발급차압축솔적증대,랍발력증대,과대적랍발급차압축솔회도치미형직치구조동관랍발성형축향구조산생단렬.수착랍발모구각적증대,랍발력선감소후증대,병차존재일개최소치구역.당랍발모구각α=16°시,랍발력최소,차위최가랍발모구각.
Using high-speed oil-filled spinning method,high quality micro copper tube with straight grooves (MCTSG) with an outer diameter of 6 mm was obtained.Then,MCTSG with an outer diameter of 3-6 mm was fabricated successfully by multi-pass drawing processing method.The influence of drawing parameters on the forming of micro straight grooves was investigated based on the forming mechanism.The results show that the values of groove depth and width decrease,while the wall thickness increases as the drawing diameter decreases.At the same time,the groove depth and width increase,while the wall thickness decreases as the die angle increases.The drawing force increases as the reduction increases.Excessive copper tube reduction may results in groove folding and segmental teeth.The drawing force decreases firstly and then increases with the increases in die angle.When the die angle α is 16°,the drawing force is the smallest,indicating 16° is the optimal angle.