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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="vpbdpqq" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265669208984/676197.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ji87zqx" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>蘇州RD12M焊絲價(jià)格</p><p><span>***更新：</span>2020-06-23 20:27:17</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="s8lelcy" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">簡(jiǎn)敏精密五金制造(上海)有限公司</a></p><p><span>聯(lián)系人：</span>龔先生</p><p><span>郵箱: </span></p><p><span>電話: </span>13818473006</p><p><span>傳真: </span>021_69726282</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-69726282</p><p><span>地址: </span>顧北東路365號(hào)C區(qū)1101</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="esegn2m" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="vuwip28" class="box"><p><p> 要做到以下要求：一是為了保證試板坡口兩側(cè)有良好的熔合，采用的焊接電流宜稍大，當(dāng)用ф，焊接電流以90A為宜；二是要采用短弧施焊，以利于保護(hù)熔池，同時(shí)利用電弧作用力把熔池鐵液托住，并且把部分熔滴過(guò)渡到試件背面（即上面）；三要使后續(xù)熔池覆蓋前一熔池的1/2，并適當(dāng)提高焊接速度，以減小熔深，減小液態(tài)金屬自身重力，避免焊縫金屬下垂上凹；四是保持正確的運(yùn)條方式，使焊條與試板左右兩側(cè)呈90o，并與焊接方向呈70o～80o的夾角。施焊時(shí)，焊件背面應(yīng)保持2/3弧柱，以利于熔滴過(guò)渡和熔池保護(hù)。運(yùn)條時(shí)應(yīng)左右輕微擺動(dòng)。當(dāng)焊至接近試板中部時(shí)，蘇州RD12M焊絲價(jià)格，因變形使間隙變窄，此時(shí)可不使焊條左右橫向擺動(dòng)，而沿焊接方向連弧焊接；五是更換焊條接頭要迅速，應(yīng)在接頭部位處于紅熱狀態(tài)下迅速引弧，盡快恢復(fù)焊接狀態(tài)，這樣可使接頭處成形良好，也可減少氣孔、夾渣等缺點(diǎn)。填充層的焊接填充層采用左右擺動(dòng)運(yùn)條方式連弧焊接，操作昱應(yīng)注意兩點(diǎn)：一要使焊條與試板在左右方向上處于垂直狀態(tài)，蘇州RD12M焊絲價(jià)格，以避免填充層焊縫左右不等厚，影響焊縫成形。為了把握好角度，有的焊工改用雙手握焊鉗施焊，效果不錯(cuò)；二要將道間熔渣清理干凈，蘇州RD12M焊絲價(jià)格，避免出現(xiàn)夾渣。填充層以2層為宜，較薄的焊層。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="蘇州RD12M焊絲價(jià)格" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265669208984/676197.png"></div><p> 兩種氣體同時(shí)存在比單一氣體的危害作用高15--20倍。防護(hù)措施（1）通風(fēng)措施氬弧焊工作現(xiàn)場(chǎng)要有良好的通風(fēng)裝置，以排出有害氣體及煙塵。除廠房通風(fēng)外，可在焊接工作量大，焊機(jī)集中的地方，安裝幾臺(tái)軸流風(fēng)機(jī)向外排風(fēng)。此外，還可采用局部通風(fēng)的措施將電弧周圍的有害氣體抽走，例如采用明弧排煙罩、排煙焊、輕便小風(fēng)機(jī)等。（2）防護(hù)射線措施盡可能采用放射劑量極低的鈰鎢極。釷鎢極和鈰鎢極加工時(shí)，應(yīng)采用密封式或抽風(fēng)式砂輪磨削，操作者應(yīng)配戴口罩、手套等個(gè)人防護(hù)用品，加工后要洗凈手臉。釷鎢極和鈰鎢極應(yīng)放在鋁盒內(nèi)保存。（3）防護(hù)高頻的措施為了防備和削弱高頻電磁場(chǎng)的影響，采取的措施有：1）工件良好接地，焊電纜和地線要用金屬編織線屏蔽；2）適當(dāng)降低頻率；3）盡量不要使用高頻振蕩器做為穩(wěn)弧裝置，減小高頻電作用時(shí)間。（4）其它個(gè)人防護(hù)措施氬弧焊時(shí)，由于臭氧和紫外線作用強(qiáng)烈，宜穿戴非棉布工作服（如耐酸呢、柞絲綢等）。在容器內(nèi)焊接又不能采用局部通風(fēng)的情況下，可以采用送風(fēng)式頭盔、送風(fēng)口罩或防毒口罩等個(gè)人防護(hù)措施?！珰寤『副仨氉⒁獾膸讉€(gè)細(xì)節(jié)。。。1930年美國(guó)發(fā)明惰性氣體保護(hù)焊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="蘇州RD12M焊絲價(jià)格" src="http://tyunfile.71360.com/UploadFile/shjianmin2/637179265668525390/8688498.png"></div><p> 焊條電弧焊從焊接電弧的基礎(chǔ)講起，按“有認(rèn)知、易學(xué)會(huì)、好掌握、能操作”的原則，由淺入深、循序漸進(jìn)地講解了焊條電弧焊的工藝?yán)碚摵蛯?shí)操技能。本書主要內(nèi)容包括：焊接技術(shù)基礎(chǔ)知識(shí)、焊條電弧焊設(shè)備、焊條的組成和分類、焊條的型號(hào)與牌號(hào)、常用焊條焊接工藝性能及選用原則、焊條的正確保管與貯存、焊條電弧焊基本工藝知識(shí)、焊接冶金基本知識(shí)、焊接接頭的組.織與性能、焊條電弧焊常見(jiàn)焊接缺點(diǎn)及其防止、典型管類和管板類焊接技術(shù)、碳弧氣刨。一、焊條電弧焊的操作焊條電弧焊**基本的操作是引弧、運(yùn)條和收尾(一)引弧引弧即產(chǎn)生電弧。焊條電弧焊是采用低電壓、大電流放電產(chǎn)生電弧，依靠電焊條瞬時(shí)接觸工件實(shí)現(xiàn)。引弧時(shí)必須將焊條末端與焊件表面接觸形成短路，然后迅速將焊條向上提起2～4mm的距離，此時(shí)電弧即引燃。引弧的方法有兩種：碰擊法和擦劃法，詳見(jiàn)圖3—14引弧方法(1)碰擊法。也稱點(diǎn)接觸法或稱敲擊法。碰擊法是將焊條與工件保持一定距離，然后垂直落下，使之輕輕敲擊工件，發(fā)生短路，再迅速將焊條提起，產(chǎn)生電弧的引弧方法。此種方法適用于各種位置的焊接。(2)擦劃法。也稱線接觸法或稱摩擦法。擦劃法是將電焊條在坡口上滑動(dòng)，成一條線，當(dāng)端部接觸時(shí)，發(fā)生短路。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/366678.html</p></div></div></div></div></div><div id="rf3yhiu" class="page-right twoColRt"><div id="w3vhe3z" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="pb3vm2n" class="recomPic likePro"><a 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