【摘要】：高速復合傳動壓力機不僅具有機械壓力機的高速度、高效率的特點,同時還具有液壓機成形好,工藝適應性好等優(yōu)點,被廣泛應用于各行各業(yè),例如汽車、機械、電器、石化、交通、五金及電力等行業(yè)。本文主要以8000KN高速復合傳動壓力機為研究對象,對其組成和工作原理、靜力學分析、結構優(yōu)化、模態(tài)分析進行研究。高速復合傳動壓力機是通過液壓系統(tǒng)控制高精度低阻尼復合油缸,通過小滑塊帶動對稱連桿增力機構,以實現(xiàn)滑塊快速下降,慢速加壓、保壓,以及快速回程的鍛壓機床設備。此外,對高速復合傳動壓力機進行有限元結構分析,其各個關鍵結構的等效應力值和變形量均在安全范圍內。接著,在不同工作載荷下,利用激光檢測儀對高速復合傳動壓力機的不同關鍵結構進行了變形測量。通過擬合回歸后,將該壓機最大變形撓度值檢測結果與模擬結果進行對比,二者相差在規(guī)定范圍內,說明高速復合傳動壓力機結構模型建立的正確,三維模型的網(wǎng)格劃分也合理,各個關鍵結構接觸、受力設置和邊界條件設置也是準確的,驗證了模擬結果的有效性。根據(jù)靜力學分析可知,將該高速復合傳動壓力機的導柱和立柱半徑作為自變量,而整機的變形和等效應力作為目標函數(shù)進行優(yōu)化分析。優(yōu)化前后的結果對比可知,其最大等效應力和機身Y軸方向最大變形均明顯減小。說明該壓機的性能比優(yōu)化前有了很大的提高和改善,并滿足了機身的設計要求。通過對高速復合傳動壓力機在預緊力狀態(tài)下和有預緊力滿載狀態(tài)下進行模態(tài)分析可知,兩種狀態(tài)下前六階的固有頻率均大于工作頻率和次聲波頻率,說明該壓機既不發(fā)生共振也不會產(chǎn)生噪聲污染。因此,該高速復合傳動壓力機具有合理的動態(tài)參數(shù),滿足了設計要求。
[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.
【學位授予單位】：天津理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG315

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