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src="/uploads/180330/1-1P330102135W2-lp.jpg" style="margin-right: 10px; float: left; width: 180px; height: 180px;" /></h3> <div> <h3> <span style="font-size: 20px;"><a href="http://www.hbjjhltu.cn">彎管機(jī)</a>在生產(chǎn)過(guò)程中模具冷彎管的方法介紹 </span></h3> </div> <div> <span style="font-size:20px;">隨著數(shù)控機(jī)床業(yè)的發(fā)展，采用先進(jìn)的數(shù)控彎管機(jī)床，配裝可靠精準(zhǔn)彎管機(jī)模具實(shí)現(xiàn)繞彎工藝可以大大提高生產(chǎn)效率，保證產(chǎn)品質(zhì)量。由于可以方便地調(diào)節(jié)工藝參數(shù)，數(shù)控<a href="http://www.hbjjhltu.cn">彎管機(jī)</a>能既準(zhǔn)確又穩(wěn)定地完成校直、校圓、送料、彎曲等動(dòng)作，保證了管制件的彎曲準(zhǔn)確度。但是彎曲銅管的質(zhì)量對(duì)工藝參數(shù)更敏感，因此對(duì)要求有充分的前期準(zhǔn)備和試制工作，尤其是彎制薄壁銅管，如果工藝參數(shù)彎管機(jī)模具選擇不當(dāng)，則很容易出現(xiàn)起皺現(xiàn)象，導(dǎo)致零件報(bào)廢。如何高效準(zhǔn)確地獲取這些工藝參數(shù)，充分保證彎管產(chǎn)品質(zhì)量，是數(shù)控繞彎工藝的研究熱點(diǎn)。 在拉繞彎曲中，芯棒相對(duì)于彎曲點(diǎn)的位置非常重要，芯棒相對(duì)于彎曲點(diǎn)超前一定位置(芯棒工作端進(jìn)入管子彎曲段)雖可使橢圓度減小，但當(dāng)芯棒超前太多時(shí)就會(huì)增加管壁減薄量，所以芯棒的位置要在彎曲試樣3～4個(gè)后確定。此外，還應(yīng)考慮彎曲厚壁管時(shí)芯棒必然往后移動(dòng)，彎曲薄壁管時(shí)芯棒必然往前移動(dòng)的特點(diǎn)。</span></div> <div> <span style="font-size: 20px;">實(shí)踐中有許多不同的彎管工藝，從不同的角度出發(fā)可以有多種不同的全自動(dòng)彎管機(jī)模具分類。工程中通常按彎管時(shí)加熱與否分為冷彎和熱彎，根據(jù)彎曲時(shí)有無(wú)填充物分為有芯彎管和無(wú)芯彎管，銅管特別是薄壁銅管彎曲都采用冷彎法。 冷彎法是在常溫下使管子彎曲成形，由于彎管時(shí)不用加熱，對(duì)彎曲不銹鋼管、鋁管及銅管更為適宜。常用的冷彎法有滾壓彎曲、拉繞彎曲、推繞彎曲以及壓力彎曲等，現(xiàn)主要介紹拉繞彎曲成形中管件的相關(guān)問(wèn)題。一般情況下，冷彎的彎曲半徑應(yīng)不小于管子直徑的1．5倍。由于管子具有一定的彈性，當(dāng)彎曲時(shí)施加的外力消除后，管子會(huì)彈回一個(gè)角度，在彎曲時(shí)彎管機(jī)模具必須要有一定過(guò)彎量?；貜椓康拇笮∨c管子材料的機(jī)械性能、壁厚以及彎曲半徑大小有關(guān)，一般銅管彎制時(shí)回彈角大約為2 ～4 。 拉繞彎曲是將管材夾緊在<a href="http://www.hbjjhltu.cn">彎管機(jī)</a>模具上，隨彎管模具一起轉(zhuǎn)動(dòng)，當(dāng)管材被拉過(guò)壓塊時(shí)，壓塊即將管材繞彎在彎曲模上，屬于成形模彎曲工藝。</span></div> <div id="9eg0kyc" class="float_c news-page fs_14"> <div id="r8uknj2" class="f_l"> 上一篇：<a 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