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"/images/banner/s5.jpg"; var randomBgIndex = Math.round( Math.random() * 4 ); //输出随机的背景图 document.write('<style>.banner{background:url(' + bodyBgs[randomBgIndex] + ') no-repeat 50% bottom}</style>'); //]]> </script> <section> <div class="banner" style="height:160px;"> </div> </section> <!-- 面包屑导航开始 --> <div class="container "> <nav class="sub_menu"> <ol class="breadcrumb"><span class="glyphicon glyphicon-list"></span> <li><a href="/">网站首页</a></li> <li><a title="技术文章" href="/bethel/NC">技术文章</a></li> <li><a title="数控文章" href="/bethel/news">数控文章</a></li> </ol> </nav> </div> <!--/sub_menu--><!-- 面包屑导航结束 --> <!-- 页面标题开始 --> <div class="title"> <h3><a>龙门加工中心工作台筋板布置对静刚度的影响<small></small></a></h3> </div> <!-- 页面标题结束 --> <hr class="featurette-divider"> <!-- 中部开始 --> <div class="container"> <!-- 正文 --> <div class="lead" id="print"> <p><span style="font-size: small;"> <span style="line-height: 8.5pt; text-indent: 0cm; background-color: transparent;">引言</span> </span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:14.7pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 23.0pt;line-height:15.6pt;mso-line-height-rule:exactly;background:transparent"> </p> <p><span style="font-size: small;"> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:14.7pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 23.0pt;line-height:15.6pt;mso-line-height-rule:exactly;background:transparent"><span class="2">龙门加工中心在制造业中是很重要的加工设 备之一，由于其具有跨距大、结构合理、刚性好、通 过工件宽度大等优点，因此被广泛应用在航空、航 天、汽车工业、模具、大型复杂零件制造等诸多领 域，以实现其高速度、高精度、高效率的“三高”加工 要求<sup>[13]</sup>.其工作台是龙门加工中心的重要组成部 件，_方面，它的静刚度将直接影响机床的加工精 度和精度稳定性；另_方面，在机床的设计和制造 过程中，人们总是希望在满足机床的强度和刚度的 条件下尽可能地减轻零部件的质量<sup>[]</sup>，因此，对加 工中心工作台进行静刚度研究是十分必要的.机床 的静刚度是指机床在静态力作用下抵抗变形的能 力，其值越大，表明机床的静刚度越好<sup>[5]</sup></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span></p> </span></p> <p class="20" align="left" style="margin: 0cm 0cm 2.95pt; text-indent: 0cm; line-height: 8.5pt; background: transparent;"><span style="font-size: small;"><span class="2">1工作台几何模型的建立</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"> </p> <p><span style="font-size: small;"> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span class="2">用</span><span class="2Georgia"><span lang="EN-US">SolidWorks</span></span><span class="2">建立龙门加工中心工作台的三 维实体模型</span><span class="26pt">，</span><span class="2">其整体尺寸为1 </span><span class="2"><span lang="EN-US" style="font-family: SimSun;">000</span></span><span class="2Georgia"><span lang="EN-US">X</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">582</span></span><span class="2Georgia"><span lang="EN-US">X</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">140 </span></span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="26pt"><span lang="EN-US">，</span></span><span class="26pt"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2">考虑到_些细小结构对工作台整体性能影响很小</span><span class="26pt">， </span><span class="2">根据圣维南原理<sup>[]</sup>，在不影响工作台刚度和强度的 条件下，为提高有限元分析的效率，对部分局部特 征如工艺孔、凸台、倒角、螺纹特征等进行了合适的 简化处理，即去除这些局部特征<sup>[7 8]</sup></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span><span class="2">在有限元分析 时，为方便、准确地施加载荷和约束，用</span><span class="2Georgia"><span lang="EN-US">Solid</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">- </span></span><span class="2Georgia"><span lang="EN-US">Works</span></span><span class="2">建立工件和丝杠母座的三维实体模型，并 将它们装配在一起.根据工作台筋板的不同，有以 下三种方案的工作台设计形式</span><span class="26pt">：</span></p> </span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;tab-stops:42.95pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(1)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">方案1:0形筋工作台</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">筋板在工作台内部左右、前后对称分布，0形 直径为75 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2TimesNewRoman"><span lang="EN-US">,</span></span><span class="2">相距498 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2TimesNewRoman"><span lang="EN-US">,</span></span><span class="2">每个0形筋分布等 夹角为60 °的6条轮辐</span><span class="26pt">，</span><span class="2">筋板厚度为15 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="26pt"><span lang="EN-US">，</span></span><span class="2">高度 为120 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span><span class="2">并且筋板上有几何尺寸为120 </span><span class="2Georgia">X</span><span class="2"> 24 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2">和60 </span><span class="2Georgia">X</span><span class="2"> 24 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2">的矩形槽孔，槽孔的圆角半径 为10 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span><span class="2">这种类型的筋板结构是目前龙门工作 台应用的最普遍的形式之_，其三维模型如图1 </span><span class="2"><span lang="EN-US" style="font-family: SimSun;">(</span></span><span class="2Georgia"><span lang="EN-US">a</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">)</span></span><span class="2">所示.</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;tab-stops:42.95pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(2)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">方案2<sub>:</sub>椭圆形筋工作台</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">工作台内部分布着5条椭圆形筋板</span><span class="26pt">，</span><span class="2">工作台中 心为椭圆圆心，长、短轴上两条相邻筋板间距分别 为50 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2">和52 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2TimesNewRoman"><span lang="EN-US">,</span></span><span class="2">筋板厚度为10 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2TimesNewRoman"><span lang="EN-US">,</span></span><span class="2">高度为 120 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span><span class="2">其结构相对0形筋较简单</span><span class="26pt">，</span><span class="2">易于加工制 造，这种类型的筋板结构也适用于龙门工作台，是 较为新颖的设计</span><span class="26pt">，</span><span class="2">其三维模型如图1 </span><span class="2"><span lang="EN-US" style="font-family: SimSun;">( </span></span><span class="2Georgia"><span lang="EN-US">b</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;"> )</span></span><span class="2">所示.</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;tab-stops:42.95pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(3)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">方案3<sub>:</sub>井字形筋工作台</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">在工作台内部分布着间隔均匀的筋板，长度方 向7条，间距为118 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2">,宽度方向6条，间距为75 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">,</span></span><span class="2">筋板厚度为10 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">,</span></span><span class="2">高度为120 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">,</span></span><span class="2">组成井 字形，并且筋板上有几何尺寸为</span><span class="2"><span lang="EN-US" style="font-family: SimSun;">72 </span></span><span class="2Georgia"><span lang="EN-US">X</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">40 </span></span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2">和60 </span><span class="2Georgia"><span lang="EN-US">X</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">40 </span></span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2">的矩形槽孔，槽孔的圆角半径为10 </span><span class="2Georgia"><span lang="EN-US">mm</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">. </span></span><span class="2">这种筋板同样结构简单，易于加工制造，也是龙门 加工中心工作台应用较为普遍的筋板类型之一，其 三维模型如图</span><span class="2"><span lang="EN-US" style="font-family: SimSun;">1(</span></span><span class="2Georgia"><span lang="EN-US">c</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">)</span></span><span class="2">所示.</span></span></p> <p class="20" align="left" style="margin: 0cm 0cm 0.0001pt; text-indent: 33pt; line-height: 24.7pt; background: transparent;"><span style="font-size: small;"><span class="2"> 2分析方案设计</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">工件在加工时，为顺利完成作业，可能会装夹 到工作台上的不同位置，就会使工作台有不同的静 变形，从而测定的静刚度也会有所不同</span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"> <span class="2">为了准确地表述工作台的静刚度，又由于工作 台是对称的，因此可在工作台的1/4处均匀的取 5 4个点，以起始侧边角处为坐标原点，第一点距工 作台</span><span class="2Georgia">X</span><span class="2">向边界50 </span><span class="2Georgia">mm</span><span class="2"><span style="font-family: SimSun;">, </span></span><span class="2Georgia">Y</span><span class="2">向边界</span><span class="2"><span style="font-family: SimSun;">50 </span></span><span class="2Georgia">mm</span><span class="2"><span style="font-family: SimSun;">,</span></span><span class="2">记为</span><span class="2"><span style="font-family: SimSun;">1.</span></span><span class="2">然 后，按两点之间</span><span class="2Georgia">X</span><span class="2">向和</span><span class="2Georgia">Y</span><span class="2">向分别相距50 </span><span class="2Georgia">mm</span><span class="2">和 </span><span class="2"><span style="font-family: SimSun;">38. 2 </span></span><span class="2Georgia">mm</span><span class="2">再取53个点，分别记为2,3,…</span><span class="2"><span style="font-family: SimSun;">54.</span></span><span class="2">将尺 寸</span><span class="2"><span style="font-family: SimSun;">100</span></span><span class="2Georgia">X</span><span class="2"><span style="font-family: SimSun;">100</span></span><span class="2Georgia">X</span><span class="2"><span style="font-family: SimSun;">50 </span></span><span class="2Georgia">mm</span><span class="2">的工件与工作台装配，并使 工件的底面中心分别位于这些点上，再将丝杠母座 也装配到工作台上.其中，工件底面中心位于1点 处的装配体如图2所示.</span></span></p> <p class="20" align="left" style="margin: 0cm 0cm 5.35pt; text-indent: 0cm; line-height: 8.5pt; background: transparent;"><span style="font-size: small;"><span class="23ptExact">3静力学分析</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.85pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2Georgia1"><span lang="EN-US">ANSYS</span></span><span class="23ptExact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Georgia1"><span lang="EN-US">Workbench</span></span><span class="23ptExact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="23ptExact">是 </span><span class="2Georgia1"><span lang="EN-US">ANSYS</span></span><span class="23ptExact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Exact">公司开发的 新一代协同仿真集成平台，是做有限元分析的大型 通用</span><span class="2Georgia1"><span lang="EN-US">CAE</span></span><span class="2Exact">软件，其易用性、通用性及兼容性相比 传统</span><span class="2Georgia1"><span lang="EN-US">ANSYS</span></span><span class="2Exact">有了很大提高</span><span class="2Exact"><span lang="EN-US" style="font-family: SimSun;">.</span></span><span class="2Exact">其典型的静力学分析 步骤为：前处理（导入几何模型、材料属性选择、划 分网格）、施加载荷和约束、求解<sup>[911]</sup>.</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"> </span></p> <p class="20" align="left" style="margin: 0cm 0cm 0.0001pt; text-indent: 0cm; line-height: 8.5pt; background: transparent;"><span style="font-size: small;"><span class="2Exact"><span lang="EN-US" style="font-family: SimSun;">3. </span></span><span class="23ptExact">1前处理</span></span></p> <p class="20" align="left" style="margin: 0cm 0cm 0.0001pt; text-indent: 0cm; line-height: 8.5pt; background: transparent;"> </p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.85pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2Exact">通过 </span><span class="2Georgia1"><span lang="EN-US">SolidWorks</span></span><span class="2Exact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Exact">和 </span><span class="2Georgia1"><span lang="EN-US">ANSYS</span></span><span class="2Exact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Georgia1"><span lang="EN-US">Workbench</span></span><span class="2Exact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Exact">无缝 连接导入</span><span class="2Georgia1"><span lang="EN-US">ANSYS</span></span><span class="2Exact"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Georgia1"><span lang="EN-US">Workbench</span></span><span class="2Exact">中，这样避免了因 格式转换重新生成有限元模型时，模型特征的丢 失，省去了模型重建的时间<sup>[12]</sup>.工作台装配体各部 分的材料属性如表1所示.</span></span></p> <p class="20" style="margin: 0cm 0cm 0.0001pt; text-align: justify; text-indent: 23pt; background: transparent;"><span style="font-size: small;"><span style="line-height: 21.1333332061768px;">划分网格时精度选取高精度 其余选项均按默</span><span style="line-height: 21.1333332061768px;">认进行网格划分１３ 网格划分后工作台的有限元</span><span style="line-height: 21.1333332061768px;">模型如图３所示．</span></span></p> <p class="20" style="margin: 0cm 0cm 0.0001pt; text-align: justify; text-indent: 23pt; background: transparent;"><span style="font-size: small;">３．２ 施加载荷和约束</span></p> <p class="20" style="margin: 0cm 0cm 0.0001pt; text-align: justify; text-indent: 23pt; background: transparent;"><span style="font-size: small;">工作台沿 Ｘ向做进给运动 滑块与线性导轨的约束可以设定为Ｘ向自由运动 Ｙ向 Ｚ向不能<span style="text-indent: 23pt; background-color: transparent;">移动 丝杠母座与丝杠属于过盈配合 不允许发生</span>相对运动 故对丝杠母座的一个端面施加约束时Ｙ向 Ｚ向自由运动 Ｘ向不能移动．</span></p> <p class="20" style="margin: 0cm 0cm 0.0001pt; text-align: justify; text-indent: 23pt; background: transparent;"><span style="font-size: small;"><br type="_moz" /> </span></p> <p class="20" style="margin: 0cm 0cm 0.0001pt; text-align: justify; text-indent: 23pt; background: transparent;"><span style="font-size: small;"><span class="2Exact"><span style="font-family: SimSun;">3.3</span></span><span class="2Exact">计算结果与分析</span></span></p> <p class="20" style="margin: 0cm 0cm 0.0001pt; text-align: justify; text-indent: 23pt; background: transparent;"> </p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2Exact">因要计算静刚度，所以需要求解工作台的变形 量，因此设置求解结果为变形量，得到三种不同布 筋方案的工作台在各个位置处的总变形量，由于篇 幅有限，在此只列出工件在井字形筋工作台上1处 时的工作台总变形，如图4所示.</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">计算工件在0形筋工作台、椭圆形筋工作台 和井字形筋工作台54个位置处的复合静刚度，考 虑到在实际加工时，工件不会被装夹到工作台边缘 处，因此没有在边缘处取点.再由工作台的对称性， 得到整个工作台除边缘处的复合静刚度.将各组数 据导入到</span><span class="2Georgia">MATLAB</span><span class="2">软件中，</span></span></p> <p class="20" align="left" style="margin: 0cm 0cm 0.0001pt; text-indent: 22pt; line-height: 15.6pt; background: transparent;"><span style="font-size: small;"><span class="2">在1/4工作台上<sub>：</sub>0形筋工 作台的最大复合静刚度为1 563 </span><span class="2Georgia"><span lang="EN-US">N</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;">/</span></span><span class="2Georgia"><span lang="EN-US">pm</span></span><span class="2">，</span><span class="2">位置坐标</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"> <span class="2">为</span><span class="2">（</span><span class="2"><span style="font-family: SimSun;">250,291);</span></span><span class="2">最小复合静刚度为563 </span><span class="2Georgia">N</span><span class="2"><span style="font-family: SimSun;">/></span></span><span class="2Georgia">m</span><span class="2">，</span><span class="2">位置 坐标为</span><span class="2">（</span><span class="2"><span style="font-family: SimSun;">100,252. 8).</span></span><span class="2">椭圆形筋工作台的最大复合 静刚度为1 740 </span><span class="2Georgia">N</span><span class="2"><span style="font-family: SimSun;">/></span></span><span class="2Georgia">m</span><span class="2">，</span><span class="2">位置坐标为（300,</span><span class="2"><span style="font-family: SimSun;">291);</span></span><span class="2">最 小复合静刚度为703 </span><span class="2Georgia">N</span><span class="2"><span style="font-family: SimSun;">/"</span></span><span class="2Georgia">m</span><span class="2">，</span><span class="2">位置坐标为（500, </span><span class="2"><span style="font-family: SimSun;">138. 2).</span></span><span class="2">井字形筋工作台的最大复合静刚度为 2 009 </span><span class="2Georgia">N</span><span class="2"><span style="font-family: SimSun;">/"</span></span><span class="2Georgia">m</span><span class="2">，</span><span class="2">位置坐标为（300,</span><span class="2"><span style="font-family: SimSun;">291);</span></span><span class="2">最小复合静 刚度为600 </span><span class="2Georgia">N</span><span class="2"><span style="font-family: SimSun;">/></span></span><span class="2Georgia">m</span><span class="2">，</span><span class="2">位置坐标为</span><span class="2">（</span><span class="2"><span style="font-family: SimSun;">100,252. 8).</span></span><span class="2">综上 看来，三种不同的工作台最小复合静刚度都位于边 缘处和了形槽附近，应尽量避免工件装夹于工作 台这些区域的附近；其最大复合静刚度都位于支座 附近，工件装夹于工作台的这些区域，可提高其加 工精度</span><span class="2"><span style="font-family: SimSun;">.</span></span></span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:11.7pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 23.0pt;line-height:15.6pt;mso-line-height-rule:exactly;background:transparent"><span style="font-size: small;"><span class="2">井字形筋工作台的平均复合 静刚度最大，工件在其上加工时，变形最小，加工精 度最高.但是，井字形筋的静刚度标准差也是最大 的，其静刚度分布不均匀，在进行加工时，位置的选 择对工件的加工精度影响很大.</span></span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:5.95pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 0cm;line-height:8.5pt;mso-line-height-rule:exactly;background:transparent"><span style="font-size: small;"><span class="21">4</span><span class="2">结论</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">用</span><span class="2Georgia"><span lang="EN-US">SolidWorks</span></span><span class="2">软件建立了龙门加工中心工作 台3种三维实体模型，在</span><span class="2Georgia"><span lang="EN-US">ANSYS</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2Georgia"><span lang="EN-US">Workbench</span></span><span class="2">软件 中进行了静力学分析，最后使用</span><span class="2Georgia"><span lang="EN-US">MATLAB</span></span><span class="2">软件绘 制了工作台的静刚度图谱，可得到以下结论：</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"> <span class="2">从工作台质量上看：井字形筋工作台质量 比椭圆形筋工作台质量轻</span><span class="2"><span style="font-family: SimSun;">10. 14</span></span><span class="2Georgia">kg</span><span class="2">，</span><span class="2">比0形筋工作 台轻</span><span class="2"><span style="font-family: SimSun;">14. 11</span></span><span class="2Georgia">kg</span><span class="26pt">，</span><span class="2">其惯性力对工作台的影响最小当</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:0cm;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"><span class="2">工件加工需要工作台经常做高速运动时，建议选用 井字形筋工作台.</span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(1)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">从工作台平均复合静刚度上看</span><span class="2MingLiU1">：</span><span class="2">井字形筋 </span><span class="22pt">工作台平均复合静刚度比椭圆形筋工作台高 </span><span class="22pt"><span lang="EN-US" style="font-family: SimSun;">11. </span></span><span class="22pt">85%</span><span class="2MingLiU1">，</span><span class="22pt">比0形筋工作台高</span><span class="22pt"><span lang="EN-US" style="font-family: SimSun;">18. </span></span><span class="22pt">68%</span><span class="2MingLiU1">，</span><span class="22pt">其变形最 </span><span class="2">小，加工精度最高.当工件的某些部位加工精度要 求较高时，可参考静刚度图谱，将工件装夹于合适 位置，建议选用井字形筋工作台</span><span class="2"><span lang="EN-US" style="font-family: SimSun;">.</span></span></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:23.0pt;line-height:15.6pt;mso-line-height-rule: exactly;background:transparent"><span style="font-size: small;"> </span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:20.7pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 23.0pt;line-height:15.6pt;mso-line-height-rule:exactly;background:transparent"><span style="font-size: small;"><span class="2"><span lang="EN-US" style="font-family: SimSun;">(</span></span><span class="2">3 </span><span class="2"><span lang="EN-US" style="font-family: SimSun;">)</span></span><span class="2">从工作台静刚度标准差上看</span><span class="2MingLiU1">：</span><span class="2">井字形筋工 作台的静刚度标准差比0形筋工作台和椭圆形筋 工作台分别高</span><span class="2"><span lang="EN-US" style="font-family: SimSun;">23. </span></span><span class="22pt">10%和</span><span class="22pt"><span lang="EN-US" style="font-family: SimSun;">12. </span></span><span class="22pt">46%</span><span class="2MingLiU1">，</span><span class="22pt">0形筋工作台 </span><span class="2">的静刚度波动范围最小，分布更均匀.当工件的加 工要求其加工精度整体分布比较均匀时，建议选用 0形筋工作台.</span></span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:20.7pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 23.0pt;line-height:15.6pt;mso-line-height-rule:exactly;background:transparent"> </p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:20.7pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 23.0pt;line-height:15.6pt;mso-line-height-rule:exactly;background:transparent"><span style="font-size:9.0pt;font-family:宋体;mso-ascii-font-family: 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href="/bethel/5-aix/show-2861.html" target="_blank">微型五轴加工中心的设计</a></h4> <p>机床整机性能测试与评估主要包括以下几个方面： （1）精度测试：包括直线轴、旋转轴的定位精度、重复定位精度、主轴端面跳动、径向跳动等指标测试，用激光干涉仪来检验机床精度是否达到设计要求。 （2）刚度测试：分为机床结构刚度和加工刚度两种，前者测试机床的整体刚度，后者测试机床在加工… <a href="/bethel/5-aix/show-2861.html" target="_blank">[了解更多]</a></p> </div> <div class="news-list list-border list-border-w"> <div class="list-date"> <span>04</span> <p>2024-11</p> </div> <h4><a title="双转台五轴加工中心动态特性分析及薄弱环节辨识研究" href="/bethel/5-aix/show-2858.html" target="_blank">双转台五轴加工中心动态特性分析及薄弱环节</a></h4> <p>数控机床的动力学特性是影响机床加工精度和效率的重要因素，结合面刚度变化及机床加工空间位置变化等因素会导致机床的动力学参数发生改变，影响机床的加工性能。为了探究五轴加工中心和五轴钻攻中心的动态特性及其影响因素，本文围绕转台轴承结合面刚度和加工空间位姿对双转台五轴机床的工作台回转系统… <a href="/bethel/5-aix/show-2858.html" target="_blank">[了解更多]</a></p> </div> <div class="news-list list-border list-border-w"> <div class="list-date"> <span>04</span> <p>2024-11</p> </div> <h4><a title="双转台五轴加工中心旋转轴位置无关几何精度" href="/bethel/5-aix/show-2857.html" target="_blank">双转台五轴加工中心旋转轴位置无关几何精度</a></h4> 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<p>影响木工五轴加工中心实木家具加工质量的因素很多，要提高加工质量和生产效率，可以从操作人员、五轴加工中心、器具、加工现场、工艺等五个方面入手，建立落实完善各种标准制度。另外，企业还要重视人员的培训和数据库的建立，才能提高加工质量，逐步实现实木家具生产数字化转型升级。… <a href="/bethel/5-aix/show-2855.html" target="_blank">[了解更多]</a></p> </div> <!-- 内容列表结束 --> </div> <!-- 相关文章结束 --> <!-- 页底推荐图文产品开始 --> <hr class="featurette-divider"> <!-- 页面标题开始 --> <div class="title"> <h3 class="wow bounceInDown" data-wow-delay="0.5s"><a href="/bethel/cnc">产品中心<small></small></a></h3> <span>——</span> </div> <!-- 页面标题结束 --> <div class="container"> <div class="blank30"></div> <!-- 中部开始 --> <div class="row"> <div class="col-xs-12 col-sm-3 col-md-3 col-lg-3"> <p></p> <p><a title="" href="/bethel/cnc" class="content-bottom-list-more">Learn more</a></p> </div> <div class="col-xs-12 col-sm-9 col-md-9 col-lg-9"> <div class="row"> <div class="post-masonry col-xs-12 col-sm-6 col-md-4 col-lg-4"> <a title="U260T五轴钻攻中心" href="/bethel/cnc/show_37.html" class="img-auto"> <img class="img-responsive" alt="U260T五轴钻攻中心" 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