高温板成形试验机的研制

发布时间：2018-01-02 05:38

  本文关键词：高温板成形试验机的研制　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 板成形试验机 有限元分析 液压系统 控制系统 加热炉

【摘要】：随着高强度材料的出现，相关的研究开始越来越多。尽管高强度材料有着优异的性能，，但是其本身的特点使得这种材料比较难以成形，这就限制高强度材料的大规模应用。在高温条件下，材料流动性增强，成形所需要的力减小，因此研究高温下的板料成形有着其研究的意义，材料超塑性性能的研究是目前的研究热点。 试验机作为一种专门的工具，可以很好地检验材料的力学性能，是材料科学研究的重要试验设备。试验机的发展需要与新材料的不断出现相适应，传统的板成形试验机不能满足高强度板料的成性试验，因此需要研制一款新型的板料成形试验机。 本文从试验机所要完成的试验内容出发，分析设计了一台高温下的板料成形实验机。首先通过理论计算确定了整体结构和基本尺寸，对于关键部件使用限元模拟软件ABAQUS进行校验和优化模拟，分析应力集中部位以及变形较大部位，使整体设计更加合理，根据设计选择合适的电机和丝杠等部件，完成了整个试验机的三维模型设计，确保整个机构尺寸设计的合理，保证各个部位在试验中相互配合而不产生干涉，确保试验机方案整体可行。 其次根据试验机的各种动作需求设计了相应的液压系统以及控制系统，液压系统采用电液比例控制，以适应各种不同情况的需求，完成了液压系统图；控制部分采用PLC进行控制，选择并设计合适的检测单元和控制单元，完成硬件接线图；详细介绍了整个系统的控制工作流程。 再次对试验机进行应用分析，进行高温试验时设计有最高温度可达1200℃的加热炉以满足对于高温条件的需求，加热炉采用井式结构，采用钼丝作为加热元件，炉温采用PID进行调节控制。 所设计的试验机更换不同的模具可以进行不同的板料成形试验，试验机吨位较大，可以满足一些难成形板料对于压边力以及成形力的需求，高温炉的加入使得试验机可以方便的完成高温下的成形试验。论文所完成的试验机可以进行多种板料试验，适用范围广，是目前板料试验机的发展趋势和主要研究方向。
[Abstract]:With the emergence of high strength materials, more and more related research began. Although high strength materials have excellent properties, their own characteristics make it difficult to form this material. This limits the large-scale application of high-strength materials. Under the condition of high temperature, the material fluidity increases and the forming force decreases. Therefore, the research of sheet metal forming at high temperature has its significance. The research on superplastic properties of materials is a hot topic at present. As a special tool, the testing machine can well test the mechanical properties of materials and is an important test equipment for material science research. The development of the testing machine needs to adapt to the continuous emergence of new materials. The traditional sheet forming test machine can not satisfy the forming test of high strength sheet metal, so it is necessary to develop a new kind of sheet forming test machine. In this paper, a sheet metal forming experiment machine at high temperature is designed and analyzed based on the experimental contents of the testing machine. Firstly, the whole structure and basic size are determined by theoretical calculation. For the key components, the finite element simulation software ABAQUS is used to check and optimize the simulation, and the stress concentration and deformation are analyzed to make the overall design more reasonable. According to the design, we select suitable parts such as motor and lead screw, complete the 3D model design of the whole testing machine, ensure the reasonable size design of the whole mechanism, and ensure that all parts cooperate with each other and do not interfere in the test. Ensure the overall feasibility of the testing machine. Secondly, the hydraulic system and control system are designed according to the requirements of the testing machine. The hydraulic system adopts electro-hydraulic proportional control to meet the needs of different situations, and the hydraulic system diagram is completed. The control part uses PLC to control, select and design the appropriate detection unit and control unit, complete the hardware wiring diagram; The control workflow of the whole system is introduced in detail. Thirdly, the application of the tester is analyzed, and the furnace with the highest temperature of 1200 鈩

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