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style="font-family: SimSun;">1.2</span></span></a><span class="6" style="line-height: 14pt; background-color: transparent;">机床动态特性研究概况</span></p> <div class="Section1"> <p class="140" align="left" style="margin: 0cm 0cm 3.8pt 12pt; line-height: 12pt; background: transparent;"><st1:chsdate year="1899" month="12" day="30" islunardate="False" isrocdate="False" w:st="on"><span class="14"><span style="font-family: SimSun;">1.2.1</span></span></st1:chsdate><span class="14">数控机床动态特性研究的重要性</span></p> <p class="890" style="margin-top:0cm;margin-right:12.0pt;margin-bottom:0cm; margin-left:12.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph; text-indent:24.0pt;line-height:21.85pt;mso-line-height-rule:exactly;background: transparent"><span class="89">效率和质量是先进制造技术的主体。由国内外数控机床的研究状况</span><span class="89Constantia"><span lang="EN-US">w</span></span><span class="89">来看， 髙速切削技术可以极大地提高加工效率、产品的质量和档次，大大缩短生产周期 和提高市场竞争能力。所谓高速切削包括有高切削速度切削；高主轴速度切削； 高进给切削；高速和高进给切削；高生产率切削。现在主轴转速达到了 </span><span class="89"><span style="font-family: SimSun;">20000</span></span><span class="89Constantia"><span lang="EN-US">rpm</span></span><span class="89">，</span><span class="89"><span style="font-family: SimSun;"> </span></span><span class="89">甚至有</span><span class="89"><span style="font-family: SimSun;">40000</span></span><span class="89Constantia"><span lang="EN-US">rpm</span></span><span class="89-1pt"><span style="font-family: 宋体;">，</span></span><span class="89-1pt"><span lang="EN-US">60000</span></span><span class="89Constantia"><span lang="EN-US">rpm</span></span><span class="89"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="89">的出现。进给量更是 </span><span class="89"><span style="font-family: SimSun;">30</span></span><span class="89Constantia"><span lang="EN-US">m</span></span><span class="89"><span style="font-family: SimSun;">/</span></span><span class="89Constantia"><span lang="EN-US">min</span></span><span class="89"><span style="font-family: SimSun;">, 40</span></span><span class="89Constantia"><span lang="EN-US">m</span></span><span class="89"><span style="font-family: SimSun;">/</span></span><span class="89Constantia"><span lang="EN-US">min</span></span><span class="89">甚至 </span><span class="89"><span style="font-family: SimSun;">60</span></span><span class="89Constantia"><span lang="EN-US">m</span></span><span class="89"><span style="font-family: SimSun;">/</span></span><span class="89Constantia"><span lang="EN-US">min</span></span><span class="89">。</span><span class="89"><span style="font-family: SimSun;"> </span></span><span class="89">美国</span><span class="89Constantia"><span lang="EN-US">MIKRON</span></span><span class="89">公司的是专为磨具生产提供主轴最高转速超过20000 </span><span class="89Constantia"><span lang="EN-US">rpm</span></span><span class="89">的高速加 工中心制造商，其一款</span><span class="89Constantia"><span lang="EN-US">Hyper</span></span><span class="89">机床主轴转速达到了 </span><span class="89"><span style="font-family: SimSun;">60000</span></span><span class="89Constantia"><span lang="EN-US">rpm</span></span><span class="89">。</span><span class="89">用来加工一飞机 箱体类零件仅仅耗时</span><span class="89"><span style="font-family: SimSun;">30</span></span><span class="89Constantia"><span lang="EN-US">min</span></span><span class="89">，</span><span class="89">而同样的零件在一般高速铣床加工需</span><span class="89"><span style="font-family: SimSun;">3</span></span><span class="89Constantia"><span lang="EN-US">h</span></span><span class="89"><span style="font-family: SimSun;">,</span></span><span class="89">在普通铣 床加工需</span><span class="89"><span style="font-family: SimSun;">8</span></span><span class="89Constantia"><span lang="EN-US">h</span></span><span class="89">。</span><span class="89">高速切削加工技术从出现至今被应用于机床行业己经有30多年的 时间，以切削效率高、加工质量好、精度高等特点为机床加工业展示了美好的前 景，并产生了巨大经济效益。</span></p> </div> <p><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";mso-ansi-language:#0400;mso-fareast-language: #0400;mso-bidi-language:AR-SA"><br clear="all" style="page-break-before:always; mso-break-type:section-break" /> </span></p> <p class="890" style="margin-top:0cm;margin-right:0cm;margin-bottom:19.9pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 27.0pt;line-height:21.85pt;mso-line-height-rule:exactly;background:transparent"><span class="89">机床优良的加工性能又与其动态性能紧密相关，机床切削时的振动和变形， 不仅会影响机床的各项精度和工件的表面质量，而且还会降低生产效率和刀具的 耐用度，甚至会降低机床的使用寿命，振动所产生的噪声还会影响工作环境。对 于数控机床来说，振动的威胁是巨大的。剧烈的振动将使数控机床的驱动装置、 检测装置不能正常的工作，且不像普通机床那样经常有人看管，因而数控机床产 生的振动不易及时发现并采取相应的措施。现代制造业要求高精度、低粗糙度的 高自动化精密机床，设法提高机床的动态性能，减少和避免振动的发生，保证机 床在额定功率范围内使用时都不会发生自振，这是机床产品的一项重要研究内容。 许多研究表明，随着机床加工性能的不断提高，对机床动态性能的要求也愈来愈 高。垣野议昭早在1978年在日刊《机械〇研究》发表的文章《机床动态特性》中 就提出，颤振和热变形是影响加工精度和加工效率的主要因素<sup>[5]</sup>。德国阿亨工业 大学的</span><span class="89Constantia"><span lang="EN-US">M</span></span><span class="89"><span style="font-family: SimSun;">.</span></span><span class="89">韦克教授在70年代曾较系统地论述了鉴定机床动态特性的意义。他认 为，这种特性往往会对机床功率的利用产生难以预料的影响<sup>[6]</sup>。所以，对机床动 态特性进行研究具有极其重要的意义。</span></p> <p class="890" style="margin-top:0cm;margin-right:0cm;margin-bottom:19.9pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 27.0pt;line-height:21.85pt;mso-line-height-rule:exactly;background:transparent"> </p> <p class="MsoNormal"><span style="font-size:9.0pt;font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">本文采摘自“</span><span lang="EN-US" style="font-size:9.0pt">VMC1060</span><span style="font-size:9.0pt; font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">型立式加工中心试验模态分析”，因为编辑困难导致有些函数、表格、图片、内容无法显示，有需要者可以在网络中查找相关文章！本文由伯特利数控整理发表文章均来自网络仅供学习参考，转载请注明！</span><span lang="EN-US" style="font-size:9.0pt"> <o:p></o:p></span></p></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <a 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<p>在机测量技术由于其成本低、检测效率高、无需二次装夹等优势被广泛用于零件加工测量当中，使得五轴加工中心和五轴钻攻中心，同时又兼具测量功能。在机测量系统的构成如图1所示，硬件部分主要是由高精度探头、信号接收器、机床整个本体，软件部分由机床控制系统、测量软件等组成[8]。待零件加工完成… <a href="/bethel/5-aix/show-2959.html" target="_blank">[了解更多]</a></p> </div> <div class="news-list list-border list-border-w"> <div class="list-date"> <span>05</span> <p>2024-11</p> </div> <h4><a title="五轴加工中心进给系统动态误差影响因素" href="/bethel/5-aix/show-2958.html" target="_blank">五轴加工中心进给系统动态误差影响因素</a></h4> <p>加工精度是影响机床性能和产品质量的主要难题，也是制约国家精密制造能力的重要因素。本文以五轴加工中心为对象，针对提升机床精度进行了研究。并且随着科技的发展，精密的仪器和零件在生产实践中占据的分量逐渐增加，在数控机床这种精密机器精度不断提高的同时，必须控制内外界环境的随机影响因素在… <a href="/bethel/5-aix/show-2958.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 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