高速复合传动压力机有限元分析与结构优化

发布时间：2018-10-15 12:24

【摘要】：高速复合传动压力机不仅具有机械压力机的高速度、高效率的特点,同时还具有液压机成形好,工艺适应性好等优点,被广泛应用于各行各业,例如汽车、机械、电器、石化、交通、五金及电力等行业。本文主要以8000KN高速复合传动压力机为研究对象,对其组成和工作原理、静力学分析、结构优化、模态分析进行研究。高速复合传动压力机是通过液压系统控制高精度低阻尼复合油缸,通过小滑块带动对称连杆增力机构,以实现滑块快速下降,慢速加压、保压,以及快速回程的锻压机床设备。此外,对高速复合传动压力机进行有限元结构分析,其各个关键结构的等效应力值和变形量均在安全范围内。接着,在不同工作载荷下,利用激光检测仪对高速复合传动压力机的不同关键结构进行了变形测量。通过拟合回归后,将该压机最大变形挠度值检测结果与模拟结果进行对比,二者相差在规定范围内,说明高速复合传动压力机结构模型建立的正确,三维模型的网格划分也合理,各个关键结构接触、受力设置和边界条件设置也是准确的,验证了模拟结果的有效性。根据静力学分析可知,将该高速复合传动压力机的导柱和立柱半径作为自变量,而整机的变形和等效应力作为目标函数进行优化分析。优化前后的结果对比可知,其最大等效应力和机身Y轴方向最大变形均明显减小。说明该压机的性能比优化前有了很大的提高和改善,并满足了机身的设计要求。通过对高速复合传动压力机在预紧力状态下和有预紧力满载状态下进行模态分析可知,两种状态下前六阶的固有频率均大于工作频率和次声波频率,说明该压机既不发生共振也不会产生噪声污染。因此,该高速复合传动压力机具有合理的动态参数,满足了设计要求。
[Abstract]:High speed compound drive press not only has the characteristics of high speed and high efficiency of mechanical press, but also has the advantages of good forming of hydraulic press and good adaptability of technology. It is widely used in various industries, such as automobile, machinery, electrical appliance, petrochemical, etc. Transportation, hardware and power industries. In this paper, the composition and working principle, statics analysis, structure optimization and modal analysis of 8000KN high speed compound drive press are studied. High speed compound drive press is a forging machine tool equipment which controls high precision and low damping compound cylinder through hydraulic system and drives symmetrical connecting rod force booster by small slider to realize fast drop of slider, slow pressure, keep pressure, and quick return range. In addition, the finite element structure analysis of high speed compound drive press shows that the equal effect force and deformation of each key structure are in the safe range. Then, under different working loads, the deformation of different key structures of high speed compound drive press is measured by using laser detector. After fitting and regression, the test results of the maximum deformation deflection of the press are compared with the simulation results. The difference between the two results is within the prescribed range, which shows that the structural model of the high-speed compound transmission press is correct. The mesh division of the 3D model is also reasonable, and the contact of each key structure, force setting and boundary condition setting are also accurate, which verifies the validity of the simulation results. According to the static analysis, the radius of the guide column and column of the high-speed compound drive press is taken as the independent variable, and the deformation and equivalent stress of the whole machine are taken as the objective function to optimize the analysis. The results before and after optimization show that the maximum equivalent stress and the maximum deformation along the Y axis of the fuselage are obviously reduced. It shows that the performance of the press is greatly improved than that before optimization, and meets the design requirements of the fuselage. The modal analysis of high speed compound drive press under preload and full load shows that the first six natural frequencies are larger than the working frequency and the infrasonic frequency. It shows that neither resonance nor noise pollution occurs in the press. Therefore, the high-speed compound drive press has reasonable dynamic parameters and meets the design requirements.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG315

【相似文献】