1.3课题的主要内容
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1.3.1本文研究对象介绍margin-left:8.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;
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CNC320型加工中心回转工作台是为了满足市场的广泛需求而研发的一种 *装备。本课题主要研究CNC320型加工中心回转工作台系统的动态特 性，提高工作台系统的抗振性和稳定性，通过结构优化设计，提高系统的工作 性能，为社会创造更好的经济效益。margin-left:8.0pt;text-align:justify;text-justify:inter-ideograph;text-indent:
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CNC320型加工中心回转工作台的设计参数如表1.1所示：15.9pt;margin-left:3.0pt;text-align:center;line-height:10.5pt;mso-line-height-rule:
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表1.1加工中心回转工作台的设计参数
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mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top:
.05pt;mso-height-rule:exactly\">Tab. 1.1 The design parameters of machining center rotary table
0cm 0cm 0cm 0cm\">
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">中心高
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">362 （ mm）
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">中心套孔直径
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">60 （ mm）
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">工作台尺寸
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">（D320 （mm）
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">中心轴高度
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">237 （ mm ）
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">T型槽宽度
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mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">28（mm）
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">回转角度
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">360°
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">使用压力
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">2.5MPa
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">使用流体
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">液压油
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">分度方向
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">顺/逆时针
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">大载重
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">800kg
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frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">分度精度
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">±0.2 （ mm）
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10.5pt;mso-line-height-rule:exactly;background:transparent;mso-element:
frame;mso-element-frame-width:427.7pt;mso-element-wrap:no-wrap-beside;
mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;
mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">重复精度
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mso-element-left:center;mso-element-top:.05pt;mso-height-rule:exactly\">±0.2 （ mm）
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1.3.2课题主要的研究内容
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本文以CNC320型加工中心回转工作台系统（以下简称工作台系统）为研 究对象，主要研究内容包括：margin-left:8.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;
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（1） 工作台的静态力学分析。margin-left:8.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph;
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transparent\">
依据CNC320加工中心回转工作台的工作原理,分析影响工作台系统工作性 能的因素，采用Solidworks三维软件和ANSYS Workbench有限元分析软件分别从实体建模、材料属性定义和网格划分等角度对工作台系统进行静态特性分析。
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（2） 工作台系统的动态特性分析。text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.9pt;mso-line-height-rule:
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通过前一章节对工作台的静力学分析，根据回转工作台的工作原理建立工 作台系统的力学振动建模，研究其抗振性和稳定性等动态性能。根据力学振动 模型，建立动力学微分方程，并对传动机构各部件进行惯量计算分析，找到影 响系统动态性能的关键部件，并对其进行模态分析，得到系统的前六阶固有频 率和振型。text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.9pt;mso-line-height-rule:
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（3） 回转工作台的结构优化设计。text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.9pt;mso-line-height-rule:
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根据工作台系统的结构变化和动态特性变化之间的关系，根据设计要求确 定设计变量、约束条件和目标函数，达到提高工作台系统工作性能的目的。margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent:
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（4） 总结本课题的研究内容，分析其中存在的不足和解决措施。margin-left:0cm;line-height:14.0pt;mso-line-height-rule:exactly;mso-pagination:
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1.4小结text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.9pt;mso-line-height-rule:
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本章分别就课题研究的背景及意义，以及目前国内外加工中心的研究情况、 加工中心数控回转工作静动态特性的研究现状数控回转工作台的结构优化方面 的研究情况作了分别阐述，根据工作台系统的设计要求，制定了课题研究的基 本思路。