摘要本文针对2MW大型风电主轴锻件为研究对象，将其完整的锻造工艺分成了四大锻造步骤，并运用有限元软件DEFORM，重点对倒棱滚圆、镦粗、拔长、号印分料和模锻等步骤分别进行了数值模拟。在模拟过程中分析了各个步骤的锻件内部应力应变和精度尺寸的影响。68195

首先对大型风电主轴类锻件倒棱滚圆的过程进行了模拟，研究了该过程中锻件内部应力应变状态和温度的分布以及使用平砧倒棱滚圆的精度。模拟结果表明，使用平砧滚圆，截面平均直径值与初始矩形锻件边长相比增加2.8%。

然后对大型风电主轴类锻件镦粗拔长的过程进行了模拟，研究了拔长过程中接砧量对锻件表面缺陷的影响。通过模拟拔长工序确定使用较小的接砧量60mm。

最后对大型风电主轴类锻件模锻的过程进行了模拟，设定了两组对比试验，分析不同下压方式对最终锻件的受力情况的影响，测量了模锻过程中锻件应力和温度的改变，以及最终锻件的精度。采用旋转压下方式的最终锻件顶部平均直径比标准锻件顶部直径增加3.1%mm，底部直径比标准直径增加0.6%mm，均符合工艺卡上要求。

毕业论文关键词  大型风电主轴锻件，倒棱滚圆，镦粗拔长，模锻，数值模拟，锻造工艺优化

毕业设计说明书（论文）外文摘要

Title   Large-scale Windkraft Spindel Schmiedeteile Verfahren Numerische Simulation                                     

Abstract 

2MW wind power spindle forging large as the research object, its complete forging forging process is pided into four steps, and the use of finite element software DEFORM, focusing on the chamfered round, upsetting, length, number of printed material and forging other steps were carried out numerical simulations. In the simulation analysis of the various steps in the internal stress and strain and precision forging size. 

Firstly，The chamfering and rounding process of wind power axis are       simulated. During the simulation, the strain-stress distribution，temperature and the size precision of the final forging are discussed. With a flat anvil rounded，the cross-sectional average diameter of forging increases by 2.8% compared to the original. Secondly，The heading and stretching process of wind power axis are simulated. During the simulation, the impact of received-anvil- distance on surface defects the final forging are discussed. Setting the received-anvil-distance of 60mm , which not only improve work efficiency, but also to ensure the surface of the final forging. Thirdly，The die forging process of wind power axis is simulated. During the simulation, the strain-stress distribution，temperature of the final forging and the size precision are discussed. The average diameter of the final forging top top diameter than standard forgings increased 3.1% mm, bottom diameter than the standard diameter increased 0.6% mm, are in line with craft card requirements.

Keywords  heavy axial forging, chamfering and rounding, heading and stretching, die forging, numerical simulation, forging process optimization

目   次 

1  绪 论 1

1.1  选题背景及意义 1

1.2  国内外研究概况 1

1.3 有限元软件DEFORM-3D简介 2

1.4 本课题研究内容 2

2  大型风电主轴锻件锻造过程有限元模型建立