Transactions of Materials and Heat Treatment

Title：Metal flow of a kind of spur gear precision forming

Authors： Xiong Feng Zhang Ruhua Sun Ling Wang Shi Zhu Yuefeng

Unit： Nanchang University

KeyWords： spur gear precision forming successive partial forming point tracing

ClassificationCode：TG376

year,vol(issue):pagenumber：2014,39(5):144-149

Abstract：

To clarify metal flow discipline in the new process of precision forming of spur gear with two steps of “half-ridge slot pre-forming + splitting extrusion final forming”, taking a solid spur gear with modulus of 4,number of teeth of 12 and thickness of 30 mm as the research object, observation and analysis of forward and backward tracing were carried out by using point tracing function in Deform-3D. The results show that the whole billet occurs upsetting and radial undulating side with the shape of half-ridge slot is easily to form in the process of pre-forming; While in the process of final forming, successive partial deformation occurs in the range along small circumferential radial width and metal in tooth root is pushed to two sides. The bottom of tooth root is transferred from the non-surface part of billet and metal in addendum is transferred from side face of tooth ridge. Obvious axial displacement which in addendum is longer than dedendum occurs in teeth and tooth groove. In the late stage, part of surface metal is stripped as scrap, which not only can provide process compensation for practical application, but also remove the decarbonized layer. With less complex structure and simple action, the process can form gears with distinct and full teeth and tooth groove.

Funds：

江西省教育厅2013年度科学技术研究项目(GJJ13192)

熊峰（1991-），男，硕士研究生张如华（1958-），男，博士，教授

Reference：

［1］韩向银.直齿圆柱齿轮劈挤成形初步研究[D].南昌：南昌大学，2008.Han Xiangyin. A Preliminary Study of Splitting Extrusion on Spur Gear [D]. Nanchang: Nanchang University, 2008.
［2］王师.直齿圆柱齿轮两步精密成形工艺研究[D].南昌：南昌大学，2012.Wang Shi. Study on Precision Forming of Spur Gear with Two Steps [D]. Nanchang: Nanchang University, 2012.
［3］张如华，卢险峰.槽的连续局部塑性成形与劈挤[J]．塑性工程学报，2006，13（4）：75-78.Zhang Ruhua, Lu Xianfeng. Successive partial forming and splitting extrusion of groove [J]. Journal of Plasticity Engineering, 2006, 13 (4): 75-78.
［4］祝岳峰，张如华，艾凡荣，等．劈分角对矩形槽劈挤成形的影响研究[J]．锻压技术，2013，38（2）：73-76.Zhu Yuefeng, Zhang Ruhua, Ai Fanrong, et al. Study on forming laws of split-extruding rectangular groove with different splitting angles [J]. Forging & Stamping Technology, 2013, 38 (2): 73-76.
［5］张如华，李小婷，贺龙，等．劈楔立棱面倾角对燕尾槽槽口张开的影响研究[J]．锻压技术，2012，37（1）：24-27.Zhang Ruhua, Li Xiaoting, He Long, et al. Research on ridge surface inclination effect of wedge on notch expansion for dovetail groove [J]. Forging & Stamping Technology, 2012, 37 (1): 24-27.
［6］王沁军．尖头劈楔劈挤矩形槽成形规律初步研究[D]．南昌：南昌大学，2009.Wang Qinjun. Preliminary Study on Forming Laws of Cuspidal Splitter Split-extruding Rectangular Slot [D]. Nanchang: Nanchang University, 2009.
［7］张如华，王师，祝岳峰，等．槽深变化对矩形槽劈挤成形的影响研究[J]．锻压技术，2012，37（2）：67-70.Zhang Ruhua, Wang Shi, Zhu Yuefeng, et al. Study on forming laws of split-extruding rectangular groove with different groove depths [J]. Forging & Stamping Technology,2012, 37 (2): 67-70.
［8］贺龙．燕尾槽劈挤成形规律试验研究[D]．南昌：南昌大学，2010.He Long. Experimental Study on Split-extrusion Law of Dovetail Slot [D]. Nanchang: Nanchang University, 2010.
［9］胡亚民．锻造工艺过程及模具设计[M]．北京：中国林业出版社，2006.Hu Yamin. The Forging Process and Die Design[M]. Beijing: China Forestry Publishing House, 2006.
［10］中国机械工程学会塑性工程学会．锻压手册：第1卷 [M]．3版. 北京：机械工业出版社，2008.Society for Technology of Plasticity, CMES. Forging Handbook: Third Volume [M]. Third Edition. Beijing: China Machine Press, 2008.
［11］方泉水，辛选荣，刘汀，等．直齿圆柱齿轮浮动凹模冷闭式镦挤成形数值模拟分析[J]. 锻压技术，2007，32（2）：122-125.Fang Quanshui, Xin Xuanrong, Liu Ting, et al. FEM numerical simulation analysis for the cold closed upsetting-extrusion fluctuating forging of the spur gear[J]. Forging & Stamping Technology, 2007, 32 (2): 122-125.
［12］杨程，赵升吨．浮动凹模对直齿圆柱齿轮精锻成形影响的研究[J]. 热加工工艺，2009，38（23）：112-114.Yang Cheng, Zhao Shengdun. Effect of floating die on precision forging of spur gear[J]. Hot Working Technology, 2009, 38 (23): 112-114.

Service：

【This site has not yet opened Download Service】【Add Favorite】