摘要
对铜微热管内壁轴向微沟槽高速充液旋压成形工艺进行实验研究,研究关键工艺参数包括拉管速度、旋压钢球数量、多齿芯头位置,分析其对微沟槽成形的影响,优化加工工艺参数。通过观察微沟槽横截面显微照片,分析微沟槽旋压成形过程中的塑性变形,初步探讨轴向微沟槽高速充液旋压成形机理。实验结果表明,拉管速度应在48 cm/min～64 cm/min之间,最佳旋压球数量为4,多齿芯头和旋压球之间的距离不得大于3.7 mm;金属塑性变形较小、未被充分挤压入多齿芯头沟槽,是影响微沟槽成形的主要原因。
The forming process of axial micro-grooves of micro-heatpipe via high-speed oil-filled spinning was analyzed.The effects of crucial process parameters including drawing speed,spinning ball numbers and multi-tooth tool position on the forming of micro grooves were studied.The forming mechanism of axial micro-grooves of micro-heatpipe forming via high-speed oil-filled spinning were discussed through analyzing the sectional metallograph of grooves and plastic deformation of copper tube during spinning.The experimental results show that the small groove-depth is due to the insufficient deformation and plastic flow of copper.The optimal drawing speed is between 48 and 64 cm/min,spinning ball number is 4 and distance between multi-tooth tool and spinning ball should be no more than 3.7 mm.The inadequacy plastic deformation and pressing into the grooves are the main factors affecting the forming of micro-grooves.
出处
《机械科学与技术》
CSCD
北大核心
2011年第5期727-731,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51075155
U0934005)
中央高校基本科研业务费专项资金项目(2009ZM0168)资助
关键词
微热管
微沟槽
旋压成形
显微照片
micro-heatpipe
micro-grooves
spinning
metallograph
