TBM盘形滚刀刀圈的锻压成形工艺研究

发布时间：2018-08-02 17:13

【摘要】：盘形滚刀的刀圈作为全断面岩石掘进机(TBM)的消耗件,其机械性能的好坏直接影响到TBM的掘进速度。为了提高刀圈的使用寿命,国内很多学者也都从不同方面进行了大量研究,但有关刀圈成形工艺方面的研究很少。本文选择了空心圆柱和实心圆柱两种形状的刀圈坯料作为研究对象,利用塑性力学知识,对其成形过程中进行了简化,从理论上得出了各变量的数学表达式。然后用金属成形模拟软件DEFORM-3D对具体的成形过程进行了模拟。合理的金属流线分布有利于刀圈机械性能的提高,而原始坯料的尺寸是影响流线分布状态的主要因素。本文根据刀圈的实际工作状态,对刀圈理想的金属流线分布进行了描述。通过对不同尺寸的坯料成形后的金属流线进行对比分析,选出了最优的尺寸。分别用经验公式和DEFORM软件对刀圈锻压时的模具载荷进行了计算。还利用DEFORM软件的后处理功能,得到了刀圈坯料的应力分布图和速度分布图,并分别进行了对比分析。通过对以上各变量的分析,分别从空心坯料和实心坯料中选出了最好的一个。然后对比分析了它们在锻压过程中的速度场分布。结果表明,实心的刀圈坯料锻压成形后的综合性能更好。最后利用DEFORM软件的点追踪功能,对刀圈刃部的变形过程进行了更加具体的分析。
[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.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.31;TG316

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