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    	<div class="nyNewsDetail_Title"><h1>洛氏硬度计的操作、保养、校验说明</h1></div>
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            <span><img src="/skins/158899/images/date01.png" />更新时间：2017-12-14</span><span><img src="/skins/158899/images/hit.png" />点击次数：11802</span>
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            <p><strong><span style="font-family:宋体"><span style="font-size:16.0pt">洛氏硬度计的操作、保养、校验说明</span></span></strong></p><p>&nbsp;</p><p>&nbsp;&nbsp;&nbsp; <span style="font-family:宋体"><span style="font-size:12.0pt">使洛氏硬度计保持良好测试状态，并保持测试准确性，以确保制品洛氏硬度符合规定要求。</span></span></p><p><span style="font-family:宋体"><span style="font-size:12.0pt">以HR-150A洛氏硬度计为例：</span></span></p><p><strong><span style="font-family:宋体"><span style="font-size:12.0pt">部件名称：</span></span></strong><span style="font-family:宋体"><span style="font-size:12.0pt">（如图示）</span></span></p><p><img alt="" src="http://img48.chem17.com/9/20171214/636488622830054412544.png" style="height:311px; width:580px" /></p><p>&nbsp;</p><p><strong><span style="font-family:宋体"><span style="font-size:15.0pt">操作方法：</span></span></strong></p><p style="margin-left:41.9pt; margin-right:16.15pt"><strong><span style="font-family:宋体"><span style="font-size:12.0pt">调节荷重：</span></span></strong><span style="font-family:宋体"><span style="font-size:12.0pt">根据所需测定洛氏硬度种类，调节&ldquo;荷重调节手柄&rdquo;如规定</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">为HRA则旋转手柄使&ldquo;60&rdquo;字样与机器上红点对齐即正测试者，如为HRB则调到&ldquo;100&rdquo;字样，如为HRC调到&ldquo;150&rdquo;字样。</span></span></p><p><strong><span style="font-family:宋体"><span style="font-size:12.0pt">压头调节：</span></span></strong><span style="font-family:宋体"><span style="font-size:12.0pt">如测定HRA和HRC则用120</span></span><span style="font-size:12.0pt">˚</span><span style="font-family:宋体"><span style="font-size:12.0pt">金钢石测头，如测定</span></span><span style="font-size:12.0pt">HRB</span><span style="font-family:宋体"><span style="font-size:12.0pt">则用</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">Ф</span></span><span style="font-size:12.0pt">1.588</span><span style="font-family:宋体"><span style="font-size:12.0pt">毫米钢球测头，换测头时，用扳手松掉&ldquo;紧固螺钉&rdquo;放低工作台取出测头</span></span><span style="font-size:12.0pt">(</span><span style="font-family:宋体"><span style="font-size:12.0pt">注意不可让测头碰到工作台</span></span><span style="font-size:12.0pt">)</span><span style="font-family:宋体"><span style="font-size:12.0pt">装上需更换测头，锁紧&ldquo;紧固螺钉&rdquo;即可。</span></span></p><p style="margin-left:12.4pt; margin-right:16.15pt"><strong><span style="font-family:宋体"><span style="font-size:12.0pt">试块校正：</span></span></strong><span style="font-family:宋体"><span style="font-size:12.0pt">当调好荷重与测头后，取出与需测硬度同类且数值相当的硬度</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">标准块(附件箱放置 )，先测一次，以削除测头与机身之间隙，数据不可读取。再测第二次、第三次来校正机器。</span></span></p><p style="margin-right:16.15pt"><strong><span style="font-family:宋体"><span style="font-size:12.0pt">程序如下：</span></span></strong></p><p style="margin-left:47.95pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">&nbsp;&nbsp;&nbsp; 1.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">将标准块与工作台擦拭干净，标准块放于工作台上。</span></span></p><p style="margin-left:47.95pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">&nbsp;&nbsp;&nbsp; 2.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">旋转手轮，使标准块与测头有一初试验力标准为指示器内小表盘指针指在其红点中间。</span></span></p><p style="margin-left:59.95pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">&nbsp;&nbsp;&nbsp; 3.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">调整指示器，使大表盘指针对准C B字样处偏差不可超过&plusmn;5个刻度，若超过5个刻度则应重新选点试验。</span></span></p><p style="margin-left:59.95pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">&nbsp;&nbsp;&nbsp; 4.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">拉动施荷手柄，施加主试验力(向自己方向拉动)</span></span></p><p style="margin-left:59.95pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">&nbsp;&nbsp; 5.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">当指针不再转动时，向对方推动卸荷手轮。</span></span></p><p style="margin-left:38.2pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">6.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">读值HRA与HRC照指示器外黑色字样&ldquo;C&rdquo;处读数，HRB照红色字</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">样&ldquo;B&rdquo;处读数，特别说明 洛氏硬度一般*、二次测量不准确，通常需校正3-5次。</span></span></p><p style="margin-left:38.2pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">7.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">比对测试结果与标准值的差异看硬度计是否准确，误差值不超过&plusmn;</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">1.5</span></span><span style="font-size:12.0pt">˚</span><span style="font-family:宋体"><span style="font-size:12.0pt">，并且确保两个测量点之间的距离应超过直径的</span></span><span style="font-size:12.0pt">4</span><span style="font-family:宋体"><span style="font-size:12.0pt">倍。（</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">如不准确须进行调节，准确则可进行测试。）</span></span></p><p style="margin-left:59.9pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">A.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">当硬度标准块为HRA时，测量点为600个，点与点之间的距离为</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">1.4mm</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">，如超过600个测试点时，标准块应报废。</span></span></p><p style="margin-right:16.15pt"><img alt="" src="http://img50.chem17.com/9/20171214/636488623985843594618.png" style="height:241px; width:368px" /></p><p style="margin-left:59.9pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">B.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">当硬度标准块为HRC47、 HRC61左右时，测量点为144个，点与点之间的距离为2.8mm，如超过144个测试点时，标准块应报废。</span></span></p><p style="margin-left:59.9pt; margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">C.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">当硬度标准块为HRC27、 HRB91左右时，测量点为91个，点与点之间的距离为3.4mm，如超过91个测试点时，标准块应报废。</span></span></p><p style="margin-right:16.15pt"><strong><span style="font-family:宋体"><span style="font-size:12.0pt">试验测试：</span></span></strong><span style="font-family:宋体"><span style="font-size:12.0pt">操作方法同&ldquo;3-3校正程序&rdquo;</span></span></p><p style="margin-right:16.15pt"><strong><span style="font-family:宋体"><span style="font-size:15.0pt">维护保养：</span></span></strong></p><p style="margin-right:16.15pt"><strong><span style="font-family:宋体"><span style="font-size:12.0pt">保养周期：</span></span></strong></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">1.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">每次使用前机器表面均须擦拭干净，且测试工作台及标准块表面涂布防锈油。</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">2.</span></span><span style="font-family:宋体"><span style="font-size:12.0pt">每月一次在丝杠与手轮接触面挤入少量机油。</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">精度：规定校正标准块时，误差值不超过&plusmn;1.5</span></span><span style="font-size:12.0pt">˚</span><span style="font-family:宋体"><span style="font-size:12.0pt">为准确。</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">保养人员：量具管理员。</span></span></p><p style="margin-right:16.15pt"><span style="font-family:宋体"><span style="font-size:12.0pt">记录：月保养及年保养记录留存</span></span></p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p> 
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