【作者】 王淼；

【导师】 张建卓；

【作者基本信息】 辽宁工程技术大学 ， 机械工程， 2019， 硕士

【摘要】 在冲击地压矿井巷道中使用嵌有折棱管吸能构件的防冲液压支架,能有效减少冲击地压造成的破坏。但是现有模具无法加工出合格吸能构件,构件侧向折棱处划伤严重。通过对该模具的分析,构件损伤主要由于该设备斜上模与其存在点接触问题,致使构件无法达到性能指标要求。本文根据这一问题,在现有模具基础上提出对斜上模尖角倒圆角的优化方法,取得了一定减少损伤的效果,但是仍无法达到工业要求。进而通过TRIZ理论提出并设计了一种新型翻板式折棱管吸能构件制作模具,通过介绍该模具的具体结构和加工过程,探讨了该模具能够避免与工件之间点接触的原因,进而减少了工件的损伤。本文运用SolidWorks软件三维建模,并通过有限元仿真软件DEFORM对现有模具及两种优化模具作了数值模拟分析。主要模拟分析了三种加工设备的加工过程以及过程中工件的损伤与各阶段模具正压力变化情况,比较此三种方式成形的吸能构件的优缺点。并通过轴向挤压不同优化方式成形的构件,证明了翻板式吸能构件制作模具加工出的吸能构件在受到轴向载荷时更加平稳,不易产生偏载现象。并对新型翻板式模具在工艺上进行优化,主要单独分析了润滑情况与模具圆角大小对加工质量的影响,得出了模具圆角是影响吸能构件质量的最主要因素;然后通过正交试验的方法分析工件初始温度以及各模具加载速率对工件质量的影响,得到了较为合理的模具工艺参数,将构件的损伤值降低到了工业损伤容许范围内,为模具的优化提供了一定的理论基础。该论文有图50幅,表11个,参考文献80篇。更多还原

【Abstract】 The anti-impact hydraulic supports with energy-absorption components of the folded edges tube is used in rock brush mine roadway,which can effectively reduce the damage caused by rock burst.However,the existing mould cannot process the qualified energy absorbing component,and the side ribbed part of the component is scratched seriously.Through the analysis of the mould,the damage of the component is mainly due to the problem that the inclined top die of the mould is in contact with the existing point,so that the component cannot meet the performance index requirement.According to this problem,the damage can be reduced to some extent by rounded treatment,but it still falls short of industrial requirements.Furthermore,a new type of flip mould is proposed and designed by TRIZ theory.By analyzing the concrete structure and machining process of the mould,the reason that the die can avoid contact with the workpiece effectively is discussed,and the damage of the workpiece is reduced.In this article,the SolidWorks software is used for 3D model,and the finite element simulation software DEFORM is used for the numerical simulation analysis of the existing mould and two types of optimized mould.This paper mainly simulates and analyzes the process of three kinds of processing equipment,the damage of the workpiece in the process and the change of the positive pressure of the die in each stage.The advantage and disadvantage of energy-absorption components formed by three methods are compared.Through the extrusion simulation experiment of the formed components with two optimization methods,it’s prove that the components produced by the flip mould are more stable when they are subjected to axial load,and it’s not easy to produce off-load phenomenon.Then,the optimization of the process of the flip mould is carried out.The influence of the lubrication condition and the rounded sizes of die on the processing quality is analyzed separately.It’s concluded that the rounded sizes of the die is most important factor affecting the quality of the components.Next the influence of the initial temperature of the workpiece and loading rate of each die on the workpiece quality is analyzed by the orthogonal test method.The damage value of the component is reduced to the allowable range of industrial damage,which provides a theoretical basis for the improvement of mould.更多还原