基于ABAQUS软件的弯曲成形工艺研究

发布时间：2017-12-28 14:31

本文关键词：基于ABAQUS软件的弯曲成形工艺研究　出处：《湖北工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：当下,弯曲成形工艺日渐得到了多个领域的应用,其中主要用在工业生产中,例如汽车制造中的零部件和构件。而现在关于弯曲成形工艺和模具的设计就是要为了琢磨明白如何实现弯曲工艺,并且在弯曲成形工艺的过程中具有哪些特点,并根据特征设计弯曲工艺的方案,生产出相应的弯曲模。弯曲工艺说简单些就是在某种压力下将一定形状和尺寸的工件弯曲成所需要的零件形状。常用到的就有冲压工艺方法,就是采用压力机来进行板料模具的压弯加工。而弯曲的手艺有多种,例如压弯、折弯、滚弯、拉弯。用此种工艺制成的金属制件和模具具有高精度、高性能的优势,而且在进行弯曲的工艺中还能提高效率,节约生产的成本,资源得到充分的利用。随着新产品新技术投放到工业生产中,由于其开发的成本较高,开发的周期较长,并且能否成功还存在疑虑,所以现在大多数的企业为了能够在降低生产成本的同时又不影响生产经营,因此出现了仿真技术。随着计算机技术和数值仿真技术的发展,计算机辅助工程分析(Computer Aided Engineering)这一新兴的技术,在成形加工和模具行业中的应用,极大的可以帮助工程技术人员对产品、加工工艺、工模具、以及制造成本等进行反复的评估、修改和优化,直到获得最佳的结果。成形模拟的过程是通过建立仿真对象的数学模型,采用有限元数值计算的方法来对仿真对象进行求解,从而获得由数字或图形显示的如厚度、开裂、起皱等分布的变化结果。在分析成形仿真时,首先要分析研究的对象就是成形的材料。因为材料的模型和性能对仿真的结果有较大的影响。而模具和压边圈都能够当成刚体来进行处理,并且凹凸模的运行轨迹都是固定不变的。而采用ABAQUS对弯曲成形工艺进行模拟可以利用ABAQUS数值模拟来尽量的缩短原型实验所需的时长和产品进入市场的周期;设置科学合理的参数能够有效地降低对工件的损耗,合理的设计坯料能够减少不必要的飞边,增加原材料的使用率。参考一些合理的想法和建议这对对模具的设计和加工十分有帮助;进而在加工的过程中,优化加工程序,大大的提高产品成型后的质量。本文通过对45。V形件、90。V形件、U形件及二次成形件的成形及回弹的计算机仿真分析,最先开始分析研究了仿真计算时的理论参数。把弯曲件的成形作为研究的目标,与此同时得出的参数应当有以下几方面:有限元的单元尺寸和类型,压力边、凸凹模间隙和摩擦系数及材料性能,这些都是影响弯曲的参数。
[Abstract]:At present, the bending process has been increasingly used in many fields, which are mainly used in industrial production, such as parts and components in automobile manufacturing. Now, the design of bending technology and die is to figure out how to realize the bending process and what characteristics it has in the process of bending, and design the bending process plan according to the characteristics, and produce the corresponding bending die. The bending process is simply to bend a workpiece with a certain shape and size into the shape of the required part under a certain pressure. It is commonly used to have the stamping process method, which is to use the press to carry out the bending process of the sheet die. There are many kinds of flexure, such as bending, bending, rolling and bending. The metal parts and moulds made by this technology have the advantage of high accuracy and high performance, and in the process of bending, it can also improve efficiency, save production costs and make full use of resources. With the new technology and new products to industrial production, due to its high cost, long cycle of development and success, there are still doubts, so now most of the enterprises in order to reduce the production cost and does not affect the production and operation, so the simulation technology. With the development of computer technology and numerical simulation technology, computer aided engineering (Computer Aided Engineering) is a new technology used in forming and mold industry, which can help engineers to products, processing technology, mould, and manufacturing cost of repeated assessment, modification and optimization, to obtain the best results. The process of forming simulation is to establish the mathematical model of the simulation object, and use the finite element numerical calculation method to solve the simulation object, so as to get the results of the distribution changes such as thickness, cracking and wrinkle, which are displayed by figures or graphics. In the analysis of forming simulation, the first to analyze the object is the forming material. Because the model and performance of the material have a great influence on the results of the simulation. The die and the edge ring can be treated as rigid bodies, and the trajectory of the concave and convex dies are fixed. Using ABAQUS to simulate can cycle by using ABAQUS numerical simulation to try to shorten the length of time required for the prototype experiment and products into the market of bending process; scientific and reasonable parameters can effectively reduce the loss of the workpiece, design reasonable blank can reduce flash less unnecessary, increase the use of raw materials the rate of. Refer to some reasonable ideas and suggestions, which is very helpful for mold design and processing. In the process of machining, optimization of machining procedures will greatly improve the quality of products after molding. This article is through to 45. V shape, 90. The computer simulation analysis of forming and springback of V, U and two forming parts is first started and the theoretical parameters of simulation calculation are first analyzed and studied. Taking the forming of bending parts as the research goal, the parameters obtained at the same time should have the following aspects: element size and type of finite element, pressure side, clearance between convex and concave die, friction coefficient and material properties, all of which are parameters affecting bending.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG306

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