模具加载方式对传动用螺旋伞齿轮闭式锻造工艺的影响  

Influence of mold loading mode on closed forging process for transmission spiral bevel gear

作　　者：徐伟[1] 万轶 沙鑫美[1] Xu Wei;Wan Yi;Sha Xinmei(School of Mechanical and Electrical Engineering,Sanjiang University,Nanjing 210012,China;School of Environmental Science,Nanjing Xiaozhuang University,Nanjing 211171,China)

机构地区：[1]三江学院机械与电气工程学院,江苏南京210012 [2]南京晓庄学院环境科学学院,江苏南京211171

出　　处：《锻压技术》2022年第6期75-80,共6页Forging & Stamping Technology

基　　金：江苏省高等学校自然科学研究项目(19KJB460006,17KJB460011);三江学院机械与电气工程学院“136工程”科研项目(21SJJD001)。

摘　　要：闭式锻造通常存在多个动模,而各个动模之间的加载方式是影响锻件成形质量的重要因素之一。针对螺旋伞齿轮闭式锻造工艺中,存在的模具寿命低、锻件填充不满等缺陷,在原模具结构基础上增加了1个动模,并通过有限元软件Deform-3D对螺旋伞齿轮的闭式锻造过程进行了建模仿真,研究了上、下凸模的4种加载方案对锻件成形质量及模具的影响,分别从材料的流动和填充规律、锻件的温度分布规律以及模具载荷的变化规律等方面进行了分析。结果表明:采用改进后的模具结构可以获得质量良好的锻件,消除了填充不满缺陷;同时,采用第3种加载方案,获得的锻件质量更好,模具的寿命更长。There are usually multiple moving molds in closed forging. Therefore, the loading mode between moving molds is one of the important factors affecting forgings quality. In closed forging process of spiral bevel gears, there were defects such as low mold life and insufficient filling of forgings. For this problem, a moving mold was added on the basis of original mold structure, and the closed forging process of spiral bevel gear was modeled and simulated by finite element software Deform-3D. Furthermore, the influences of four loading schemes of upper and lower punches on forgings quality and mold were studied, and the flow and filling law of material, the temperature distribution law of forgings and the variation law of mold load were analyzed respectively. The results show that the forgings with good quality can be obtained by adopting the improved mold structure, and the defects of insufficient filling can be eliminated. Meanwhile, the forgings with better quality and mold with longer life can be obtained by adopting the third loading scheme.

关 键 词：闭式锻造 加载方式 螺旋伞齿轮 金属流动 温度 模具载荷 

分 类 号：TG315.2[金属学及工艺—金属压力加工]