文档介绍：南京航空航天大学硕士学位论文
摘要
本文介绍了数控折弯机的发展趋势锻压机械机身结构分析的发展现状及分
析设计的一般方法以江苏富力公司的 MB8-250 3200 型数控折弯机为研究对
象使用大型通用化有限元分析软件 ANSYS 作为工具对折弯机进行了有限元
静动态特性分析并根据分析结果进行结构的优化设计
首先对折弯机的主要部件进行了结构的静态特性分析建立各部件的有限
元模型利用 ANSYS 计算出它们的强度和刚度并依据结构受力特点提出结构
修改方案
其次利用 ANSYS 分析了侧板的宽度喉口圆角半径对折弯机的机械性能
以及补偿油缸的位置对工作台变形曲线的影响并选取合适参数对机身结构和补
偿油缸的位置进行优化
再次对机身进行模态分析用 Lanczos 方法求出优化前后机身的前十阶固
有频率以及振型
最后对工作台和滑块进行了非线性接触分析动态模拟了折弯机工作过程
中工作台和滑块的受力状况为前面的分析验证提供了参考依据
通过以上分析在保证机身性能的基础上机身重量减轻了约 9 机身低阶
频率有所提高从而提高了产品质量降低了制造成本增强了企业的竞争力
关键词折弯机有限元优化设计模态非线性
I
数控液压折弯机的结构分析和优化设计
ABSTRACT
The development trend C bender, the present situation and the general
design method of the forging machine are introduced in this paper, Taking a
company'C bender as the object of this study, the static and dynamic
characteristics C bender are analyzed in ANSYS, which is a kind of general
finite element analysis software. Frame structure has been optimized based on the
analysis results.
First, the static characteristic of the main part C bender is analyzed. The
finite element model of these part are established, the stress and the strain of every
part puted by ANSYS. Plan of redesigning of the structure is proposed based
on the analysis.
Second, the influences of the thickness of the side board and the Radius of
curvature to the mechanical performance are analyzed by ANSYS. Appropriate
parameters are selected to optimize the frame structure and the position of the
compensatory cylinder.
Third, modal analysis of frame is done to extract the first ten natural frequencies
and modalities of the frame structure in Lanczos method.
Finally, the nonlinear contact analysis method is used on the work table and
slider, which can simulate strained condition in the working process of a bender
dynamically. The analytical results provide reference basis for preceding analysis.
Quality of the frame is reduced 9% in insurance of performance of the p