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<span style="white-space:normal;line-height:3;font-size:13px;">東莞市科科研磨材料有限公司</span><br style="white-space:normal;" /> <span style="white-space:normal;line-height:3;font-size:13px;">聯(lián)系人：朱炳濤</span><br style="white-space:normal;" /> <span style="white-space:normal;line-height:3;font-size:13px;">手機：13380188126 13925159328</span><br style="white-space:normal;" /> <span style="white-space:normal;line-height:3;font-size:13px;">地址：東莞市厚街鎮南五社區東坑街7號二樓</span> </div> </div> </div> </div> <div id="pdpfdjlzrz" class="indexRight"> <div id="pdpfdjlzrz" class="right_1"><a name="5"></a></div> <div id="pdpfdjlzrz" class="neiye_line2Video"> <div id="pdpfdjlzrz" class="right_2"> <div id="pdpfdjlzrz" class="right_3"> 當前位置：<a href="/">首頁(yè)</a><span> > </span> <a href="/html/list-2-1.html">新聞資訊</a> > <a href="/html/list-5-1.html">常見(jiàn)問(wèn)題</a> </div> </div> <div id="pdpfdjlzrz" class="details_2"> <div id="pdpfdjlzrz" class="zx_top"> <h2>影響砂帶使用壽命的原因</h2> <p><span>來(lái)源：</span><span>發(fā)布時(shí)間：2019-03-26 18:13:49</span><span>點(diǎn)擊率：<span id="hits"></span></span></p> <input id="Hidden1" type="hidden" value='297' /> </div> <div id="pdpfdjlzrz" class="zx_middle"> <div id="pdpfdjlzrz" class="zx_from"> <p><span></span></p> </div> <div id="pdpfdjlzrz" class="zx_from2"> <p><a href="/index.php?m=content&c=rss" target="_blank"><img src="/statics/images/ico11-1.gif" alt="RSS訂閱" /></a> 【<a href="javascript:;" onClick="$j('cntrBody').css('font-size','16px')">大</a> <a href="javascript:;" onClick="$j('cntrBody').css('font-size','14px')">中</a> <a href="javascript:;" onClick="$j('cntrBody').css('font-size','12px')">小</a>】</p> </div> </div> <div id="pdpfdjlzrz" class="clear"></div> <div class="pdpfdjlzrz" id="cntrBody" class="zx_txt"> <p> <span style="line-height:2.5;font-size:13px;">砂帶生產(chǎn)工藝對于砂帶基材、磨料、粘結劑及植砂密度等的要求是極為嚴格的，砂帶壽命的過(guò)早結束，常常是因使用不當而造成的，下面我們就幾個(gè)典型問(wèn)題進(jìn)行分析。 </span> </p> <p> <span style="line-height:2.5;font-size:13px;"> 1． 粘蓋： </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 當一層金屬材料復蓋在磨粒切刃上，即發(fā)生粘蓋，此時(shí)砂帶表面變得亮晶晶，手摸有滑溜的感覺(jué)。粘蓋主要發(fā)生在強度較高的金屬材料，尤其以硬而韌的材料更為嚴重。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 磨削壓力不足是造成粘蓋的主要原因。對于硬度高的材料，壓力不足使磨粒難以切入工件，并難以使磨粒破碎自銳。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 較軟的接觸輪或壓板，即使加上足夠高磨削壓力，那只會(huì )使其坍塌嚴重，磨粒難以壓入工件。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 較高的砂帶速度，使磨粒在磨削區域的時(shí)間不足，切入工件深度變薄，并發(fā)熱嚴重。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 粘蓋的發(fā)生原因是綜合性的，其解決方法也是綜合性的，也就是說(shuō)合適的接觸輪或壓板，足夠高的磨削壓力，較低的砂帶速度是解決問(wèn)題的根本。當然，選擇自銳性好的磨料也是必要的。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 2．磨鈍： </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 在磨削過(guò)程中，雖然磨粒還全部存在，但鋒利度已經(jīng)很差了。這是由于磨粒切刃因磨耗而變鈍，這種現象稱(chēng)做為磨鈍。正常的磨鈍是砂帶壽命的結束，顯然我們這里所指的“磨鈍”是在磨粒尚未消耗完時(shí)，主要是砂帶選擇或使用不當而造成的情況。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 較軟的接觸輪或壓板難以使磨粒切入工件，從而造成刃部磨平。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 磨削壓力的不足同樣易使砂帶磨鈍，而且磨料難以自銳。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 當工件較硬時(shí)，選擇砂帶的不合適，或者砂帶速度較高，也難以切入工件而磨鈍。 </span> </p> <p> <span style="line-height:2.5;font-size:13px;"> 砂帶的不正常磨損，嚴重影響著(zhù)砂帶的使用壽命，大大增加加工成本，因而不可忽視。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 3．堵塞： </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 堵塞是在磨粒切刃還沒(méi)有完全磨鈍之前磨粒間隙就很快被切屑復蓋和塞滿(mǎn)，從而使砂帶喪失其切削能力。造成堵塞的原因很多，多因使用、被加工材料和砂帶選擇等的不當而造成的： </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 接觸輪或壓板太軟，造成磨粒難以切入工件之中，砂帶以磨削狀態(tài)為主，加工區溫度因摩擦而發(fā)熱，使切屑”焊”到砂帶上，造成堵塞。解決方法應采用硬的接觸輪和壓板，或者采用峰齒背的接觸輪和壓板，還可以采用小直徑接觸輪等等。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 砂帶速度過(guò)高也難以使磨粒有效地切入工件，同樣會(huì )出現堵塞及工件燒傷，此時(shí)應降低砂帶速度。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 被加工材料太軟（如鋁、銅等有色金屬）極易造成砂帶表面堵塞，解決方法應為：采用疏植砂帶；在滿(mǎn)足粗糙度要求條件下采用粗粒度砂帶。采用脆性較大的碳化硅磨料砂帶；采用加磨削助劑的方法，如使用潤滑劑等。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 易堵塞材料的加工面光滑，對這類(lèi)材料不能采用潤滑脂和粗粒度等易造成劃傷的砂帶，應采用超涂層砂帶，該產(chǎn)品有良好的排屑和防堵塞性能。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 4、砂帶跑偏的控制： </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 跑偏是影響質(zhì)量及砂帶使用壽命的關(guān)鍵，設計不合理的砂帶張緊及調整機構時(shí)會(huì )引起砂帶的跑偏及跳動(dòng)現象嚴重，從而使加工質(zhì)量達不到規定的工藝要求也大大縮短砂帶的正常使用壽命，砂帶會(huì )在很短的時(shí)間內而破裂報廢。所以，選擇支撐架鑄造成型，傳動(dòng)及調整機構高效合理的機型是獲得良好的加工效果及有效延長(cháng)砂帶的使用壽命的關(guān)鍵所在。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 5、砂帶接頭斷裂原因： </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 1. 涂膠不夠； 2.壓力時(shí)間短,溫度不夠； 3.張力大，起直皺；張力小，起斜皺4.傳動(dòng)機構穩定性差,設計不合理. </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 6、砂帶使用常見(jiàn)問(wèn)題及解決辦法。 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 砂帶上機運轉起縐，撕裂，跑偏 </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 檢查砂帶周長(cháng)是否合適（周長(cháng)允差范圍一般為正負5mm）； </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 檢查砂帶圓柱度（兩端周長(cháng)差）是否相差太大（一般兩端周長(cháng)差小于5mm）； </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 檢查砂帶是否扭曲。簡(jiǎn)單的檢查的方法：把砂帶展開(kāi)平放在較平坦的地上，砂帶的端兩邊對齊，看另一端是否扭曲； </span> </p> <p> <br /> </p> <p> <span style="line-height:2.5;font-size:13px;"> 檢查傳動(dòng)輪，壓磨板墊及被加工工件上是否有異物,接觸輪是否平行,傳動(dòng)主軸是否變形或傳動(dòng)輪是否磨損嚴重. </span> </p> <p> <br /> </p> <p> 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