【摘要】：近年來(lái),精沖工藝技術(shù)越來(lái)越廣泛地應(yīng)用于汽車零部件的制造中,精沖技術(shù)的研究也是塑性成形研究領(lǐng)域中的熱點(diǎn),但目前沒有專門用于科學(xué)技術(shù)研究的專業(yè)精沖實(shí)驗(yàn)壓力機(jī)。為了更好地服務(wù)于教學(xué)和科研,以目前學(xué)�，F(xiàn)有的一臺(tái)精沖液壓模架為基礎(chǔ),研發(fā)一臺(tái)強(qiáng)剛度、高精度的獨(dú)立導(dǎo)向四柱式精沖實(shí)驗(yàn)壓力機(jī),為精沖技術(shù)的教學(xué)、科研提供實(shí)驗(yàn)平臺(tái)。本文首先通過(guò)對(duì)現(xiàn)有的精沖液壓模架結(jié)構(gòu)和電液系統(tǒng)進(jìn)行詳細(xì)的介紹和分析,根據(jù)現(xiàn)有的液壓精沖模架的結(jié)構(gòu)特點(diǎn)以及動(dòng)作工藝,提出了一種四柱獨(dú)立導(dǎo)向、上下橫梁四柱式結(jié)構(gòu),三個(gè)動(dòng)力和運(yùn)動(dòng)獨(dú)立調(diào)制、能自動(dòng)檢測(cè)力和位移的專用精沖實(shí)驗(yàn)機(jī)總體方案。其次,運(yùn)用UG軟件建立該獨(dú)立導(dǎo)向四柱式精沖實(shí)驗(yàn)壓力機(jī)結(jié)構(gòu)三維模型,分別從315T額定加載和350T最大載荷兩個(gè)方面,運(yùn)用有限元分析軟件ANSYS模擬分析,得到不同載荷情況下的整機(jī)結(jié)構(gòu)變形數(shù)據(jù),對(duì)該整機(jī)主要結(jié)構(gòu)的剛度以及可靠性做了分析總結(jié)。根據(jù)科研實(shí)驗(yàn)的需求,不僅開發(fā)了整套控制系統(tǒng),可以實(shí)現(xiàn)自動(dòng)和手動(dòng)兩種控制,且分別設(shè)計(jì)選購(gòu)了直線位移傳感器和液壓壓力傳感器,利用電液比例控制,通過(guò)數(shù)字信號(hào)和電流信號(hào)的轉(zhuǎn)換,并用可控編程器西門子S7系列PLC編制程序,達(dá)到對(duì)主缸壓力和精沖位移進(jìn)行實(shí)時(shí)監(jiān)測(cè)的目的。最后,設(shè)計(jì)了實(shí)驗(yàn)壓力機(jī)上橫梁、立柱、下橫梁部分結(jié)構(gòu)的生產(chǎn)加工工藝,并參與指導(dǎo)企業(yè)制造出了獨(dú)立導(dǎo)向四柱式精沖實(shí)驗(yàn)壓力機(jī)。通過(guò)對(duì)獨(dú)立導(dǎo)向四柱式壓力機(jī)結(jié)構(gòu)的模擬分析,整機(jī)剛度以及強(qiáng)度符合研發(fā)要求,并且結(jié)構(gòu)簡(jiǎn)單,造價(jià)相對(duì)低廉,滿足了精沖領(lǐng)域?qū)嶒?yàn)研究的需要。為精沖技術(shù)的進(jìn)步做出了一定的貢獻(xiàn),對(duì)四柱式精沖機(jī)的市場(chǎng)研發(fā)也能夠提供很大的工程參考價(jià)值。
[Abstract]:In recent years, fine blanking technology is more and more widely used in the manufacture of automobile parts. The research of precision blanking technology is also a hot spot in the field of plastic forming research, but there is no specialized precision punching experimental press for scientific and technological research at present. In order to better serve the teaching and scientific research, based on the existing hydraulic die frame of the school at present, we have developed an independent four-column precision punching experimental press with strong stiffness and high accuracy, which is the teaching of precision punching technology. Scientific research provides experimental platform. This paper firstly introduces and analyzes the structure and electro-hydraulic system of the existing precision punching hydraulic die holder in detail. According to the structural characteristics and action technology of the existing hydraulic precision stamping die frame, a four-column independent guide is proposed. The overall scheme of a special precision punching machine with four columns of upper and lower beams and three independent dynamic and motion modulations, which can automatically detect the force and displacement. Secondly, the three-dimension model of the independent four-column precision punching press is established by using UG software. The finite element analysis software ANSYS is used to simulate the structure of the press from the aspects of 315T rated load and 350T maximum load, respectively. The deformation data of the whole machine structure under different loads are obtained, and the stiffness and reliability of the main structure are analyzed and summarized. According to the demand of scientific research experiment, not only the whole control system is developed, but also the automatic and manual control can be realized. The linear displacement sensor and hydraulic pressure sensor are designed and purchased, and the electro-hydraulic proportional control is used. Through the conversion of digital signal and current signal and the programming of Siemens S7 series PLC, the main cylinder pressure and precision blanking displacement can be monitored in real time. Finally, the production and processing technology of the upper beam, column and lower beam structure of the experimental press is designed, and the independent guiding four-column precision punching experimental press is manufactured. Through the simulation and analysis of the structure of the independent steering four-column press, it is found that the stiffness and strength of the whole machine meet the requirements of research and development, and the structure is simple and the cost is relatively low, which meets the needs of the experimental research in the field of precision blanking. It has made a certain contribution to the progress of precision punching technology, and can also provide great engineering reference value for the market research and development of four-column precision punching machine.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG385.1

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