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style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">参数的选择，对夹具是否有足够的强度及刚性保证足够夹紧力且使用轻巧是一个关键，选择参数是一个需很慎重并需反复推敲的过程。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">1.</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">丝杠直径的选择</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">选择丝杠直径，应考虑是专用机床，节奏快，生产量大，机床的实际负荷率有可能超出机床设计的允许生产率，或者工人违反工艺规程，甚至出现超载情况，认为在结构允许的情况下，最后定为直径</span><span lang="EN-US">d=50mm</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">2.</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">丝杠的头数、</span> <span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">螺距</span> <span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（导程）</span> <span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">的选择</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">对于头数、螺距应结合起来考虑，主要应在满足夹紧力、行程节拍的前提下选择，同时自锁角也是一个不容忽视的问题，若所选择的螺旋升角不自锁，则在夹紧、松开时，会使液压马达的前后腔压力不同，这样，使得液压系统复杂化。最后定为</span><span lang="EN-US">Z=2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，</span><span lang="EN-US">T=10</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，</span><span lang="EN-US">S=20</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">。计算得螺旋升角￥</span><span lang="EN-US">=8</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">°</span><span lang="EN-US">3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">′</span><span lang="EN-US">8</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">″。选材时，丝杠为</span><span lang="EN-US">45 </span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">＃钢，调质处理，丝杠母为</span><span lang="EN-US">ZQSn<st1:chsdate year="2006" month="6" day="3" islunardate="False" isrocdate="False" w:st="on">6-6-3</st1:chsdate></span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，二者的摩擦系数为（静、动一样）无润滑油时</span><span lang="EN-US">0.15</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，有润滑油时</span><span lang="EN-US">0.1</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">～</span><span lang="EN-US">0.15</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">。虽然螺旋升角在摩擦角内，但已近边缘，对于本夹具，采用自动集中润滑油系统，并提高螺旋副的光洁度。这样，即可提高效率，又可使油马达的前后腔压力相同，简化了液压系统。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">3.</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">油马达的种类、</span> <span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">扭距、</span> <span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">排梁、</span> <span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">减速比的选择</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">1</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）油马达种类和齿轮、叶片、柱塞三种常用的形式其中齿轮油马达的额定压力为</span><span lang="EN-US">10Mpa</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">；叶片油马达的额定压力为</span><span lang="EN-US">6 Mpa</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">、</span><span lang="EN-US">14 Mpa </span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">两种；柱油塞马达的额定压力为</span><span lang="EN-US">14 Mpa</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">。考虑到一般的专用金属切削设备的液压压力为</span><span lang="EN-US">4-6 Mpa</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，最高不超过</span><span lang="EN-US">6.5Mpa</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，并将经济效益、货源状况、检修维修的繁简程度综合考虑，因而选用了</span><span lang="EN-US">3YM</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">型的</span><span lang="EN-US">6 Mpa</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">叶片油马达，从结构上，这种油马达基本上也能满足要求。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）扭距、排量的选择</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">当回转半径一定的情况下，扭距越大，所产生的力也越大，而且，对于夹具，我们总是希望在结构允许的前提下，夹紧力越大越好。叶片油马达（</span><span lang="EN-US">YM </span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">型）有螺纹连接和法兰连接两种，因法兰连接不适应本液压系统（泵的流量为</span><span lang="EN-US">251/min</span><span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">）而选用螺纹连接的。型号为</span><span lang="EN-US">YM-A32-FL</span><span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">，其排量也为最大</span><span lang="EN-US">32ml/r</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">3</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）减速比的选择</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">降低转速，对于减速机构讲，还有一个目的，就是增加其输出扭距。前已所述，因为有两套相同的夹紧机构，故有两个油马达根据公式</span><span lang="EN-US">Q=Q1+Q2</span><span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">和</span><span lang="EN-US">Q=n.q</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">。可求得每个油马达的转速。最后求得每个油马达的转速为</span><span lang="EN-US">390r.p.m</span><span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">。考虑到夹紧，松开时间应符合生产节拍的要求，将每个丝杠的转速定为</span><span lang="EN-US">1.5r/s</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">。这样减速比为</span><span lang="EN-US">4.33</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">。由以上数据求出油马达减速后的输出扭距。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">二、夹紧力的计算</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">当液压系统的压力分别为</span><span lang="EN-US">2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，</span><span lang="EN-US">4</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，</span><span lang="EN-US">6MPA</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，其输出扭距分别为</span><span lang="EN-US">0.7</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，</span><span lang="EN-US">1.48</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">、</span><span lang="EN-US">2.24kg.m</span><span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">，而减速后传到丝杠的扭距分别为</span><span lang="EN-US">3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，</span><span lang="EN-US">6.41</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，</span><span lang="EN-US">9.7 kg.m</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，这些扭距所产生的夹紧力，由下式可算出：</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">M=Q[ry(φ+φ)+1f1]</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">取值</span><span lang="EN-US">M</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">：</span><span lang="EN-US">3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，</span><span lang="EN-US">6.41</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，</span><span lang="EN-US">9.7 (kgm)</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">r : </span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">螺纹平均半径</span><span lang="EN-US">,</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">取丝杠半径</span><span lang="EN-US">25</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">φ</span><span lang="EN-US">:</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">螺旋升角</span><span lang="EN-US">8</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">°</span><span lang="EN-US">3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">′</span><span lang="EN-US">8</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">″</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">φ</span><span lang="EN-US">:</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">磨擦角</span><span lang="EN-US">5</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">°</span><span lang="EN-US">42</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">′</span><span lang="EN-US">38</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">″～</span><span lang="EN-US">8</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">°</span><span lang="EN-US">31</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">′</span><span lang="EN-US">51</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">″（书中推荐</span><span lang="EN-US">10</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">°）</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">l:</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">取为</span><span lang="EN-US">1/3</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">×</span><span lang="EN-US">(D132</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">-D232</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">/D122</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">-D222</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">)</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">得</span><span lang="EN-US">21.27</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">f1:</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">支承表面磨擦系数</span><span lang="EN-US">:0.1</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">～</span><span lang="EN-US">0.5</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">最后，求得夹紧力分别为</span><span lang="EN-US">285</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，</span><span lang="EN-US">609</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，</span><span lang="EN-US">922(kgf)</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">一般情况下，专用机床液压系统的压力为</span><span lang="EN-US">44.5</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，按此种情况，夹紧力为</span><span lang="EN-US">609N</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">。因是两套机构，则对工件的夹紧力为</span><span lang="EN-US">2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">×</span><span lang="EN-US">609=1218N</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">三、丝杠强度的校核</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">有了夹紧力，丝杠的强度是否就成为另一问题了，校核其强度是必不可少的一步。因丝杠的形式为</span><span lang="EN-US">T50</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">×</span><span lang="EN-US">20/2</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，则其内径为φ</span><span lang="EN-US">39</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，其空刀部位定为φ</span><span lang="EN-US">38</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">，薄弱环节在此，校核其便可。分别按扭转刚度和扭转强度校核。</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">按扭转刚度</span><span lang="EN-US">d</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">≥</span><span lang="EN-US">11.4 (cm)</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">式中：</span><span lang="EN-US">n</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">转速</span><span lang="EN-US">(r.p.m)n=1.5 </span><span style="font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">×</span><span lang="EN-US">60=90r/min</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">功率</span><span lang="EN-US">(kw)N=M.n/975</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">为</span><span lang="EN-US">0.18</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">、</span><span lang="EN-US">0.59</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">、</span><span lang="EN-US">0.9</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">则求得</span><span lang="EN-US">d</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">分别为</span><span lang="EN-US">2.33</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">、</span><span lang="EN-US"> 3.13</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">、</span><span lang="EN-US"> 3.48(cm)</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">按扭转强度</span><span lang="EN-US">d</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">≥</span><span lang="EN-US">11.4 (cm)</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">则求得分别为</span><span lang="EN-US">1.39 2.06 2.37(cm)</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">丝杠均能满足刚度和强度要求。</span></p> <p class="MsoNormal" align="center" style="margin-top:4.5pt;margin-right:0cm; margin-bottom:7.5pt;margin-left:0cm;text-align:center;line-height:13.5pt; mso-pagination:widow-orphan;mso-outline-level:1"><b><span style="mso-bidi-font-size: 10.5pt;font-family:宋体;mso-bidi-font-family:宋体;color:#666666;mso-font-kerning: 0pt">本文由<span lang="EN-US"> </span></span></b><b><u><span style="mso-bidi-font-size: 10.5pt;font-family:宋体;mso-bidi-font-family:宋体;color:#333333;mso-font-kerning: 0pt">伯特利数控</span></u></b><b><span style="mso-bidi-font-size:10.5pt;font-family: 宋体;mso-bidi-font-family:宋体;color:#666666;mso-font-kerning:0pt">文章<span lang="EN-US"> </span>整理发表，文章来自网络仅参考学习，本站不承担任何法律责任。<span lang="EN-US"><o:p></o:p></span></span></b></p> <p class="MsoNormal" align="center" style="text-align:center;text-indent:21.0pt; mso-char-indent-count:2.0;mso-pagination:widow-orphan"><span lang="EN-US" 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<p>本文以五轴加工中心和五轴钻攻中心为研究对象，针对其结构特点，确定了温度传感器的安放数量以及安放位置。通过自主设计的全工作区域测量方案以及设备，获取机床全工作台的不同位置的热变形数据。根据模拟数控机床的实际加工过程设计了试验方案，然后进行了主轴空转情况下的包含直线轴与旋转轴运动的数… <a href="/bethel/5-aix/show-2937.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="经特征试件检测五轴加工直线轴动态误差及补偿" href="/bethel/5-aix/show-2933.html" target="_blank">经特征试件检测五轴加工直线轴动态误差及补</a></h4> <p>五轴加工中心和五轴钻攻中心是现代制造业中不可或缺的一部分，具有精度高、效率高、可以满足多种复杂形状零件加工的要求等优点，从航空航天到工业机器人，从医疗用品到消费品，都有着广泛的应用。但由于数控机床误差的存在，使得被加工零件的精度受到影响，从而无法正常使用，而加工过程中的动态误差往… <a href="/bethel/5-aix/show-2933.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> <!-- 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