【作者】 王静；

【导师】 王琳；

【作者基本信息】 武汉理工大学 ， 机械制造及其自动化， 2011， 硕士

【摘要】 随着制造技术的发展、产品需求水平的提高和制造业全球化趋势的发展,多品种小批量和单件订货型生产方式已经逐渐取代大批量生产方式而成为主流。市场竞争日趋激烈,促使企业在最短时间内用最低的成本生产出质量可靠的产品,数字化设计作为现代设计手段之一,它的应用大大地提高产品研发效率,降低生产成本,增强竞争实力。本文以企业产品竞争力为出发点,以W43T-120X3000七辊强力辊式板材矫正机为研究对象,主要开展以下几个方面的工作：1.在深入分析七辊矫正机机架基本结构的基础上,简化有限元模型,对七辊矫正机机架进行静力学分析,校核其强度和刚度是否满足条件,为机架的优化设计提供理论依据。2.对上横梁结构调优使其强度满足要求。采用子结构法对机架的上横梁、下横梁、底座进行优化设计。以机架各部分的重量最轻为优化目标,以各部分允许的最大应力及竖直方向的位移为约束条件,合理选择机架钢板厚度作为设计变量,建立其优化设计的数学模型。经过优化,使得机架各部分在满足其强度和刚度的前提下,机架材料得以合理利用,大大降低了企业的生产成本。3.对优化后的七辊矫正机架进行模态分析,分析该机架在现有边界条件下的各阶固有频率和振型,判断机架是否发生共振和噪声污染,并在模态分析的基础上,对优化后的机架进行谐响应分析,研究了影响七辊矫正机机架的关键部位在给定激励下的位移响应和变化规律。本文的研究工作有助于七辊矫正机的优化设计与改进,对于提高产品质量、降低成本和研发周期有明确的工程意义,解决了企业的迫切需要,为同类问题的研究提供良好的借鉴。更多还原

【Abstract】 With the development of manufacturing technologies, product market demand and Manufacturing globalization trend, Many varieties of small batch and single-order mode of production,which has been gradually replaced mass production, hit the mainstream. As the market competition becoming more and more fierce, it promotes the enterprise should produce reliable quality of products within the shortest time and the lowest cost. As one of modern design means, the application of digital design significantly improve the product R&D efficiency, reduce the production costs and strengthen the competing strength of the enterprise.The thesis mainly work in the following several aspects, with the enterprise product competitiveness as starting point, with W43T-120X3000 seven roller straightening machine frame as the research object.1.Based on in-depth analyzed the basic structure of seven roller straightening machine frame, the finite element model was simplified, static analysis on seven roller straightening machine frame was carried out, which checked the strength and stiffness whether meet the conditions, and provided the theory basis for the optimization design of frame.2.The upper beam structure was optimized, which made its strength meet the requirements. The optimization design of upper beam, lower beam, lower frame was carried out by substructure method. With the lightest of each parts of frame weights as optimized object, with allowable maximum stress and displacement of vertical direction of each parts as constraint conditions, reasonable choice of steel thickness as the design variables, an optimization design mathematical model was established. After optimization, frame materials got reasonable use, and the production cost of enterprise was greatly reduced, in the premise of satisfying the strength and stiffness of each parts of frame.3.The model analysis of seven roller straightening machine frame after optimization was carried out, the frame’s each step natural frequency and vibration mode in existing boundary conditions was analyzed, the frame whether occurring resonance and noise pollution was judged. On the basic of model analysis, harmonic response analysis of the frame after optimization was carried out, the displacement response and change rule under the given excitation of the key parts of affecting seven roller straightening machine frame was researched.This paper studies help seven roller straightening machine frame to be optimized design and improvement. They have clear engineering significance to improve product quality and reduce the cost and development cycles, solve urgent need of enterprise and provide good reference for the same problem research.更多还原