花键轮精密锻造成形数值模拟及实验研究

发布时间：2019-01-30 13:14

【摘要】：齿轮类零件精密锻造的研究存在不少亟待解决的问题。以往对齿轮类零件精密锻造的研究主要是只成形内齿或外齿。花键轮不同于一般齿形件的地方在于其内外都带有花键齿,这大大增加了其精密锻造成形的难度。探究内外都有齿零件的精密锻造成形在该领域是一次新的尝试,对理论研究和实际生产都具有一定的指导意义和应用价值。本文对内外带齿花键轮的多种精密锻造成形方案进行了研究,拟定了使其内、外花键齿都能成形良好的精锻工艺并设计了能用于实际生产的成形模具,并采用Deform-3D软件进行了数值模拟,从充填成形、等效应力、等效应变、温度场、成形力等多个角度分析了花键轮精密锻造成形过程,分别探究了环形坯料的温度及成形速度对成形的影响。将实际生产用模具简化后,设计加工了花键轮精密锻造实验模具并进行了实验研究。模拟结果表明:花键轮精密锻造成形过程可分为三个阶段。花键轮内外齿形充填良好,等效应力与应变分布合理,总成形力较小。结合模拟与实验结果可以看出:此花键轮内齿相对外齿较难成形,采用分流导流方式既能使内齿成形良好,也能明显降低总的成形力。实验结果也进一步验证了该工艺与模具大大改善了较难成形的齿端角隅部的充填效果。
[Abstract]:There are many problems to be solved in the research of precision forging of gear parts. In the past, the research on precision forging of gear parts mainly focused on forming inner or outer teeth. The reason why the spline wheel is different from the common tooth is that it has spline teeth inside and outside, which greatly increases the difficulty of precision forging. It is a new attempt to explore the precision forging forming of both internal and external toothed parts in this field, which has certain guiding significance and application value for theoretical research and practical production. In this paper, a variety of precision forging methods with internal and external tooth spline wheel are studied, and a precision forging process is developed to make both internal and external spline teeth form well, and a forming die which can be used in actual production is designed. The process of precision forging of spline wheel is analyzed from filling forming, equivalent stress, equivalent strain, temperature field, forming force and so on. The influence of the temperature and the forming speed of the annular billet on the forming was investigated respectively. After simplifying the mould for practical production, the precision forging experimental die of spline wheel was designed and processed and the experimental study was carried out. The simulation results show that the precision forging process of spline wheel can be divided into three stages. The internal and external tooth filling of spline wheel is good, the distribution of equivalent stress and strain is reasonable, and the total forming force is small. Combined with the simulation and experimental results, it can be seen that the internal teeth of the spline wheel are difficult to form compared with the external teeth, and that the internal teeth can be formed well and the total forming force can be obviously reduced by using the flow diversion method. The experimental results further verify that the process and die greatly improve the filling effect of the corner of the tooth which is difficult to form.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG316

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