摘要
试验研究了Q460高强度钢内螺纹的冷挤压工艺特性,分析了工件底孔直径、挤压速度与挤压次数对冷挤压内螺纹质量(包括表面形态、残余应力与显微硬度等)的影响,并优选工艺参数获得理想的内螺纹。结果表明:Q460高强度钢内螺纹冷挤压加工宜采用一次成形工艺,工件底孔直径最佳取值范围为21.20～21.30mm,机床转速为20～40r/min。
The process performance of cold extrusion of Q460 high-strength-steel internal thread was studied by experiments.The effects of hole-diameter,extrusion speed and number of extrusions on the quality of the thread,such as surface morphology,residual stress and micro hardness were analyzed.High quality internal thread was obtained by optimization of the technological parameters.Results show that the optimized technological parameters are as follows,the hole-diameter is in the range of 21.20 mm to 21.30 mm,the rotation speed of the machine tool is from 20 r/min to 40 r/min,one-step cold extrusion forming is the best technology rather than multi-step extrusion.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2012年第1期68-73,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
'863'国家高技术研究发展计划项目(SQ2008AA10XK1468859)
'十二五'国家科技计划项目(2011BAD20B03-02)
关键词
材料合成与加工工艺
Q460高强度钢
内螺纹加工
冷挤压工艺
残余应力
硬度
materials synthesis and processing technology
Q460 high-strength steel
internal thread processing
cold extrusion technique
residual stress
hardness
