【摘要】：盤形滾刀的刀圈作為全斷面巖石掘進(jìn)機(jī)(TBM)的消耗件,其機(jī)械性能的好壞直接影響到TBM的掘進(jìn)速度。為了提高刀圈的使用壽命,國內(nèi)很多學(xué)者也都從不同方面進(jìn)行了大量研究,但有關(guān)刀圈成形工藝方面的研究很少。本文選擇了空心圓柱和實心圓柱兩種形狀的刀圈坯料作為研究對象,利用塑性力學(xué)知識,對其成形過程中進(jìn)行了簡化,從理論上得出了各變量的數(shù)學(xué)表達(dá)式。然后用金屬成形模擬軟件DEFORM-3D對具體的成形過程進(jìn)行了模擬。合理的金屬流線分布有利于刀圈機(jī)械性能的提高,而原始坯料的尺寸是影響流線分布狀態(tài)的主要因素。本文根據(jù)刀圈的實際工作狀態(tài),對刀圈理想的金屬流線分布進(jìn)行了描述。通過對不同尺寸的坯料成形后的金屬流線進(jìn)行對比分析,選出了最優(yōu)的尺寸。分別用經(jīng)驗公式和DEFORM軟件對刀圈鍛壓時的模具載荷進(jìn)行了計算。還利用DEFORM軟件的后處理功能,得到了刀圈坯料的應(yīng)力分布圖和速度分布圖,并分別進(jìn)行了對比分析。通過對以上各變量的分析,分別從空心坯料和實心坯料中選出了最好的一個。然后對比分析了它們在鍛壓過程中的速度場分布。結(jié)果表明,實心的刀圈坯料鍛壓成形后的綜合性能更好。最后利用DEFORM軟件的點追蹤功能,對刀圈刃部的變形過程進(jìn)行了更加具體的分析。
[Abstract]:As a consumptive part of (TBM) of full-section rock tunneling machine, the cutter ring of disc hob has a direct effect on the speed of TBM tunneling because of its mechanical properties. In order to improve the service life of the cutter ring, many domestic scholars have also carried out a lot of research from different aspects, but the research on the forming process of the cutter ring is very little. In this paper, the blank of cutter ring of hollow cylinder and solid cylinder is chosen as the research object, and the mathematical expressions of each variable are obtained theoretically by using the knowledge of plastic mechanics to simplify the forming process of the blank. Then the metal forming simulation software DEFORM-3D is used to simulate the forming process. The reasonable distribution of metal streamline is beneficial to the improvement of the mechanical properties of the cutter, and the size of the original blank is the main factor affecting the distribution of the streamline. In this paper, the ideal metal streamline distribution of the cutter ring is described according to the actual working state of the cutter ring. By comparing and analyzing the metal streamline formed by different sizes of blank, the optimal size is selected. The die load of cutter ring forging was calculated by empirical formula and DEFORM software respectively. Using the post processing function of DEFORM software, the stress distribution diagram and the velocity distribution diagram of the cutter ring blank are obtained, and the comparative analysis is carried out respectively. Through the analysis of the above variables, the best one was selected from the hollow blank and solid blank respectively. Then the distribution of velocity field in forging process is compared and analyzed. The results show that the comprehensive properties of solid blanks are better after forging. Finally, using the point tracing function of DEFORM software, the deformation process of the edge of the cutter ring is analyzed more concretely.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U455.31;TG316

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