【摘要】：高速?gòu)?fù)合傳動(dòng)壓力機(jī)不僅具有機(jī)械壓力機(jī)的高速度、高效率的特點(diǎn),同時(shí)還具有液壓機(jī)成形好,工藝適應(yīng)性好等優(yōu)點(diǎn),被廣泛應(yīng)用于各行各業(yè),例如汽車、機(jī)械、電器、石化、交通、五金及電力等行業(yè)。本文主要以8000KN高速?gòu)?fù)合傳動(dòng)壓力機(jī)為研究對(duì)象,對(duì)其組成和工作原理、靜力學(xué)分析、結(jié)構(gòu)優(yōu)化、模態(tài)分析進(jìn)行研究。高速?gòu)?fù)合傳動(dòng)壓力機(jī)是通過液壓系統(tǒng)控制高精度低阻尼復(fù)合油缸,通過小滑塊帶動(dòng)對(duì)稱連桿增力機(jī)構(gòu),以實(shí)現(xiàn)滑塊快速下降,慢速加壓、保壓,以及快速回程的鍛壓機(jī)床設(shè)備。此外,對(duì)高速?gòu)?fù)合傳動(dòng)壓力機(jī)進(jìn)行有限元結(jié)構(gòu)分析,其各個(gè)關(guān)鍵結(jié)構(gòu)的等效應(yīng)力值和變形量均在安全范圍內(nèi)。接著,在不同工作載荷下,利用激光檢測(cè)儀對(duì)高速?gòu)?fù)合傳動(dòng)壓力機(jī)的不同關(guān)鍵結(jié)構(gòu)進(jìn)行了變形測(cè)量。通過擬合回歸后,將該壓機(jī)最大變形撓度值檢測(cè)結(jié)果與模擬結(jié)果進(jìn)行對(duì)比,二者相差在規(guī)定范圍內(nèi),說明高速?gòu)?fù)合傳動(dòng)壓力機(jī)結(jié)構(gòu)模型建立的正確,三維模型的網(wǎng)格劃分也合理,各個(gè)關(guān)鍵結(jié)構(gòu)接觸、受力設(shè)置和邊界條件設(shè)置也是準(zhǔn)確的,驗(yàn)證了模擬結(jié)果的有效性。根據(jù)靜力學(xué)分析可知,將該高速?gòu)?fù)合傳動(dòng)壓力機(jī)的導(dǎo)柱和立柱半徑作為自變量,而整機(jī)的變形和等效應(yīng)力作為目標(biāo)函數(shù)進(jìn)行優(yōu)化分析。優(yōu)化前后的結(jié)果對(duì)比可知,其最大等效應(yīng)力和機(jī)身Y軸方向最大變形均明顯減小。說明該壓機(jī)的性能比優(yōu)化前有了很大的提高和改善,并滿足了機(jī)身的設(shè)計(jì)要求。通過對(duì)高速?gòu)?fù)合傳動(dòng)壓力機(jī)在預(yù)緊力狀態(tài)下和有預(yù)緊力滿載狀態(tài)下進(jìn)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(jī)既不發(fā)生共振也不會(huì)產(chǎn)生噪聲污染。因此,該高速?gòu)?fù)合傳動(dòng)壓力機(jī)具有合理的動(dòng)態(tài)參數(shù),滿足了設(shè)計(jì)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(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG315

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