【摘要】：隨著我國“人口紅利”的消失和產(chǎn)業(yè)結(jié)構(gòu)的調(diào)整,以人工送料為主的勞動密集型簡單精沖生產(chǎn)模式面臨著越來越大的挑戰(zhàn)。本論文選取廣大中、小型精沖生產(chǎn)企業(yè)廣泛采用的短條料精沖生產(chǎn)為對象,設(shè)計(jì)和開發(fā)了一種具有精沖力學(xué)參數(shù)在線監(jiān)測和模具保護(hù)功能的短板精沖自動控制系統(tǒng)。論文的研究成果能在自動模具故障識別和模具保護(hù)的基礎(chǔ)上實(shí)現(xiàn)短條料精沖自動控制,為我國精沖自動化水平的整體提高提供了一種解決方案,具有一定的理論意義和實(shí)用價值。本研究首先綜述了精沖工藝過程及國內(nèi)外精沖自動化的研究情況,根據(jù)我國精沖自動化的發(fā)展情況,結(jié)合中、小型企業(yè)精沖自動化的客觀要求,確定以短條料精沖自動控制系統(tǒng)的實(shí)現(xiàn)為研究對象。從精沖自動化、精沖自動送料、精沖模具保護(hù)和精沖力學(xué)參數(shù)在線監(jiān)測四個方面全面分析了精沖生產(chǎn)對自動控制系統(tǒng)的需求。通過模擬量高速采樣模塊分別獲取了正常工況與故障工況下精沖主沖裁力、壓邊力、反壓力的實(shí)時動態(tài)曲線,并進(jìn)行了數(shù)據(jù)平滑濾波、平移處理與小波多尺度分解分析及對比分析研究,在此基礎(chǔ)上分析和歸納了一種模具保護(hù)策略。最后以一臺普通四柱液壓沖床配合液壓精沖模架的簡單精沖設(shè)備為對象,設(shè)計(jì)和開發(fā)了一種基于PLC的短板精沖自動控制系統(tǒng),該系統(tǒng)能在實(shí)現(xiàn)精沖生產(chǎn)過程自動控制的同時,具有自動精密步距送料、精沖模具保護(hù)和力學(xué)參數(shù)在線監(jiān)測等功能。研究表明,通過以PLC為主控制單元的精沖自動化控制系統(tǒng)可以解決中小型精沖企業(yè)自動化生產(chǎn)問題。論文研究成果對于完善單機(jī)精沖自動化控制系統(tǒng)、模具保護(hù)策略、精沖設(shè)備安全保護(hù)提供了切實(shí)可行的依據(jù),為后續(xù)精沖生產(chǎn)信息化的實(shí)現(xiàn)奠定了基礎(chǔ)。
[Abstract]:With the disappearance of "demographic dividend" and the adjustment of industrial structure in China, the labor-intensive simple fine blanking production mode, which is dominated by manual feeding, is facing more and more challenges. In this paper, an automatic control system for fine blanking of short strip is designed and developed, which has the functions of on-line monitoring of mechanical parameters of fine blanking and die protection. The research results of this paper can realize the automatic control of short strip blanking on the basis of automatic die fault identification and die protection, and provide a solution for improving the automation level of fine blanking in our country as a whole. It has certain theoretical significance and practical value. This research first summarizes the process of precision stamping and the research situation of precision stamping automation at home and abroad. According to the development of precision stamping automation in China, combined with the objective requirements of precision stamping automation in small and medium-sized enterprises. The research object is the realization of automatic control system for short strip blanking. The requirements of automatic control system for precision blanking production are analyzed from four aspects: precision blanking automation, precision blanking automatic feeding, precision punching die protection and on-line monitoring of precision punching mechanical parameters. The real time dynamic curves of blanking force, blank holder force and reverse pressure under normal working condition and fault condition are obtained by high speed sampling module of analog quantity, and the data smoothing filtering is carried out. On the basis of translation processing, wavelet multi-scale decomposition analysis and comparative analysis, a mould protection strategy is analyzed and concluded. Finally, taking a simple precision punching equipment of a common four-column hydraulic punching machine with hydraulic precision die holder as an object, a short plate precision blanking automatic control system based on PLC is designed and developed. The system can realize automatic control of fine blanking production process at the same time. With automatic precision step feeding, precision die protection and mechanical parameters online monitoring and other functions. The research shows that the automatic production problem of small and medium-sized precision punching enterprises can be solved by the precision blanking automation control system with PLC as the main control unit. The research results of this paper provide a practical basis for the improvement of automatic control system of single machine precision punching, die protection strategy and safety protection of precision punching equipment, and lay a foundation for the realization of information technology for subsequent fine blanking production.
【學(xué)位授予單位】：武漢紡織大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG385.9

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本文編號：2261154