發(fā)布時(shí)間：2018-03-05 13:19

  本文選題：液壓仿形刀架　切入點(diǎn)：結(jié)構(gòu)參數(shù)　出處：《沈陽(yáng)工業(yè)大學(xué)》2012年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：液壓仿形刀架因其結(jié)構(gòu)簡(jiǎn)單、可靠性高、經(jīng)濟(jì)性好等優(yōu)點(diǎn)廣泛應(yīng)用于非圓回轉(zhuǎn)體類(lèi)零件及各類(lèi)模具的加工。液壓仿形刀架是機(jī)液位置伺服控制系統(tǒng)的典型應(yīng)用,由靠模和刀架兩部分組成,刀架由滑閥和差動(dòng)缸剛性連接而成。靠模通過(guò)與滑閥相連接的觸頭將外形變化傳遞給刀架,從而加工出所需零件。液壓仿形技術(shù)很早就被我國(guó)引進(jìn),一直沿用至今,現(xiàn)有的液壓仿形刀架的仿形速率低、加工精度差、切削力小且很難加工出截面復(fù)雜的零件,又因其結(jié)構(gòu)特殊,滑閥與差動(dòng)缸為一整體,加工成型后結(jié)構(gòu)參數(shù)不可調(diào)節(jié),控制性能也就不可調(diào)節(jié)�；谏鲜鲈�,對(duì)液壓仿形刀架進(jìn)行理論上的研究,為液壓仿形刀架控制性能的提高提供一些理論依據(jù)是很有必要的。 根據(jù)液壓仿形刀架的工作特點(diǎn),選用正開(kāi)口雙邊滑閥與差動(dòng)缸,將兩者剛性連接,通過(guò)連桿形成反饋構(gòu)成閉環(huán)控制系統(tǒng)。依據(jù)古典控制理論建立液壓仿形刀架的數(shù)學(xué)模型,得出系統(tǒng)的傳遞函數(shù),根據(jù)傳遞函數(shù)并結(jié)合一組實(shí)際參數(shù)對(duì)系統(tǒng)進(jìn)行動(dòng)靜態(tài)特性分析及計(jì)算機(jī)仿真。通過(guò)動(dòng)靜態(tài)特性分析,了解結(jié)構(gòu)參數(shù)對(duì)系統(tǒng)開(kāi)環(huán)放大系數(shù)、固有頻率、阻尼比以及系統(tǒng)剛度的影響,并由MATLAB軟件中的Simulink仿真模塊得出系統(tǒng)的仿真曲線,根據(jù)仿真曲線分析結(jié)構(gòu)參數(shù)對(duì)系統(tǒng)控制性能的影響。通過(guò)選擇合理的結(jié)構(gòu)參數(shù)可以提高液壓仿形刀架的控制性能,從而提高液壓仿形刀架的仿形速率及加工精度。 通過(guò)對(duì)液壓仿形刀架的深入研究,可以為液壓仿形刀架的設(shè)計(jì)及結(jié)構(gòu)參數(shù)的設(shè)計(jì)提供理論依據(jù),對(duì)液壓仿形刀架控制性能的改善有一定指導(dǎo)意義。
[Abstract]:Because of its simple structure, high reliability and good economy, the hydraulic copying tool holder is widely used in the machining of non-circular rotary parts and all kinds of dies. The hydraulic copying tool holder is a typical application of the servo control system of the hydraulic position of the machine. The tool holder is made up of sliding valve and differential cylinder rigid connection. The shape change is transmitted to the tool holder by the contact connected with the slide valve, so that the required parts can be machined. The hydraulic copying technology was introduced into our country very early. Until now, the existing hydraulic copying tool holder has low copying rate, poor machining accuracy, small cutting force and difficult to produce complex cross-section parts. Because of its special structure, the slide valve and differential cylinder are a whole. The structure parameters can not be adjusted and the control performance can not be adjusted after machining. For the above reasons, it is necessary to provide some theoretical basis for the improvement of the control performance of the hydraulic copying tool holder through the theoretical research on the hydraulic copying tool holder. According to the working characteristics of hydraulic copying tool holder, two side slide valve and differential cylinder are selected, which are rigidly connected to each other, and the closed-loop control system is formed by feedback of connecting rod. The mathematical model of hydraulic copying tool holder is established according to classical control theory. According to the transfer function and a group of actual parameters, the dynamic and static characteristics of the system are analyzed and simulated by computer. Through the analysis of the dynamic and static characteristics, the open loop magnification factor and natural frequency of the system are obtained by the structural parameters. The damping ratio and the stiffness of the system are affected, and the simulation curves of the system are obtained from the Simulink simulation module in the MATLAB software. According to the simulation curve, the influence of structural parameters on the control performance of the system is analyzed. The control performance of the hydraulic copying tool holder can be improved by selecting reasonable structural parameters, thus the copying rate and machining accuracy of the hydraulic copying tool holder can be improved. Through the deep study of the hydraulic copying tool holder, it can provide the theoretical basis for the design of the hydraulic copying tool holder and the design of the structural parameters, and has certain guiding significance for the improvement of the control performance of the hydraulic copying tool holder.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TH137

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本文編號(hào)：1570419