锻压技术

汽车转向器螺杆中心细长孔冷挤压成形工艺研究

英文标题：Research on cold extrusion forming process of center elongated-hole for automotive steering screw

作者：刘百宣孙红星刘华王伟钦刘丹

关键词：细长孔转向器螺杆冷挤压成形

分类号：TG376

出版年,卷(期):页码：2013,38(6):128-131

摘要：

汽车转向器螺杆中心细长孔长径比高达15左右，且口部直径小、内部直径大。通常采用机加工，生产效率低，制造成本高。本文从转向器螺杆的坯料形状、细长孔成形后整形和挤压芯棒形状3个方面制定了挤压成形方案。设计并制作模具，进行了挤压实验。实验结果表明，3种工艺方案均能挤压成形细长台阶中心孔，但工艺复杂程度及成形后的形状尺寸略有区别。实验最终确定的最佳工艺方案为：先在坯料上加工出Ф12.5 mm中心通孔，再利用穿插台阶状芯轴挤压成形出Ф12 mm中心细长孔和Ф8 mm端头小孔。

The ratio of length to diameter of an automotive steering screw center elongated hole is up to 15, and the month diameter is small, but the inside diameter is large. Usually it is machined with low production efficiency and high manufacturing cost. Three forming processes were designed considering the blank shape, sizing after the elongated hole formed and the shape of the extrusion mandrel, respectively. After the dies were designed and made, forming experiments were carried out. The experimental results show that all the three forming processes can form the elongated stepped center hole, but the degree of process complexity, and the size and shape of forgings after forming are slightly different. Finally, a good forming process was selected that the Ф12.5 mm through hole was firstly machined in the blank and the Ф12 mm center elongated-hole and the Ф8 mm end hole were secondly formed by inserting the stepped mandrel.

基金项目：

郑州机械研究所研发基金资助项目（70709011）

参考文献：

［1］刘洁，王德俊，杨晓红.转向螺杆的挤压成形工艺研究[J].锻压技术，2007，32（5）：66-67.Liu J,Wang D J,Yang X H.Technological research on extruding steering spiral bar[J].Forging & Stamping Technology, 2007，32（5）：66-67.
［2］辛选荣，刘汀，周滨.特深孔钢件冷挤压工艺[J].锻压技术，2005，30（1）：51-53.Xin X R,Liu T,Zhou B.Cold extrusion process for steel part with an especially deep hole[J].Forging & Stamping Technology,2005，30（1）：51-53.
［3］孟令先，宋学进，张元国，等.汽车转向螺杆的精密塑性成形工艺[J].金属加工：热加工，2004，(12)：23-24.Meng L X,Song X J,Zhang Y G,et al. Automobile steering screw precision forging process[J].Machinist Metal Forming：Hot Working,2004，(12)：23-24.
［4］杨长顺. 冷挤压工艺实践[M]. 北京：国防工业出版社，1984.Yang C S. Cold Extrusion Practice[M]. Beijing: National Defence Industry Press, 1984.
［5］洪深泽. 挤压工艺及模具设计[M].北京；
机械工业出版社，1996.Hong S Z. Extrusion Process And Die design[M]. Beijing：Mechanical Industry Press，1996.
［6］洪慎章. 冷挤压实用技术[M]. 北京：机械工业出版社，2005.Hong S Z. Practical Technology of Cold Extrusion[M].Beijing:Mechanical Industry Press, 2005.
［7］吴振亭，王彦民. 筒形件冲压缩口成形工艺的数值模拟研究[J].锻压技术，2009，34（5）：58-61.Wu Z T, Wang Y M. Numerial simulation research on stemping-necking process of barrel-type workpice [J].Forging & Stamping Technology，2009，34（5）：58-61.
［8］李淑玉，田福祥. 花键套冷挤压模具设计[J]. 锻压技术，2011，36（3）：104-105.Li S Y,Tian F X. Design of spline sheath cold extrusion die[J]. Forging & Stamping Technology, 2011，36（3）：104-105.
［9］崔忠圻. 金属学与热处理[M]. 北京：机械工业出版社，1989.Cui Z Q. Metallurgy and Heat Treatment [M]. Beijing: Mechanical Industry Press, 1989.

服务与反馈：

【文章下载】【加入收藏】