摘要
为了克服斜齿圆柱齿轮(简称斜齿轮)现有工艺存在的模具结构复杂、成形力大等不足,在直齿形状凸模双向镦挤成形斜齿轮的基础上提出了斜齿凸模和无齿凸模双向镦挤两种成形方案。分析了不同成形方案下,端面摩擦力对载荷的影响。利用有限元模拟软件Deform-3D分别对三种成形方案进行了数值模拟。结果表明,采用无齿凸模镦挤成形斜齿轮在载荷及模具结构方面优于齿形凸模镦挤成形,其中无齿凸模双向镦挤较直齿凸模双向镦挤,最大载荷降低约25%;无齿凸模双向镦挤较斜齿凸模双向镦挤,最大载荷值降低约35%;无齿模具加工制造更容易,成形等效应力远小于模具材料许用应力。
In order to overcome the shortcomings of the existing technology of the helical gear such as complex die structure and large forming force,based on the two-way upsetting-extrusion of the helical gear with straight tooth punch,two forming schemes of the oblique tooth punch and toothless punch were put forward.The effect of the end surface friction force on the load under different forming schemes was analyzed.The three kinds of forming schemes were numerically simulated by finite element simulation software Deform-3D.The results show that the upsetting-extrusion of the helical gear formed with toothless punch is superior to that of straight tooth punch in terms of load and die structure,compare with that of upsetting-extrusion of the straight tooth punch,and the maximum load of the two-way upsetting-extrusion with toothless punch is reduced by about 25%,it is about 35% lower than that of the oblique tooth punch.It is easier to process and manufacture toothless dies,and the forming equivalent stress is much less than the allowable stress of the die materials.
作者
胡志军
黎中萍
HU Zhijun;LI Zhongping(Department of Mechanical Engineering,Jiangxi University of Engineering,Xinyu 338029,China;School of Mechatronics Engineering,Nanchang University,Nanchang 330031,China)
出处
《热加工工艺》
CSCD
北大核心
2018年第23期143-146,共4页
Hot Working Technology
基金
南昌大学创新基金项目(GJJ151309)
关键词
斜齿圆柱齿轮
双向镦挤
有齿凸模
无齿凸模
数值模拟
helical gear
two-way upsetting-extrusion
tooth shape punch
toothless punch
numerical simulation
