詳情介(jie)紹
螺栓球(qiu)網(wang)架(jia)煤棚封閉工程方案
(一)、零部件(jian)加工
螺栓球網(wang)架零部(bu)件(jian)在加(jia)工(gong)(gong)(gong)過程(cheng)中,我們(men)將根據加(jia)工(gong)(gong)(gong)進度(du)及甲(jia)方需要及時認真地配(pei)合甲(jia)方、設計(ji)單位(wei)、監理(li)單位(wei)對加(jia)工(gong)(gong)(gong)產品的(de)檢查。加(jia)工(gong)(gong)(gong)應嚴格遵守規(gui)范(fan)《網(wang)架結構設計(ji)與施(shi)工(gong)(gong)(gong)規(gui)程(cheng)》 (JGJ 7-2010) 和 《鋼結構工(gong)(gong)(gong)程(cheng)施(shi)工(gong)(gong)(gong)質量驗收規(gui)范(fan)》 (GB 50205-2015)的(de)規(gui)定。
(二)、螺(luo)栓球
1.螺栓球制作工藝流程(cheng)：
圓鋼下(xia)料→毛(mao)坯(pi)予鍛→毛(mao)坯(pi)模鍛→正火處理→基(ji)準孔銑(xian)(xian)面(mian)及鉆孔→水平孔銑(xian)(xian)面(mian)及鉆孔→仰角孔銑(xian)(xian)面(mian)及鉆孔→攻絲→清洗螺孔→檢驗→防腐涂(tu)裝(zhuang)→編號入庫(ku)→包裝(zhuang)發運。
其中螺(luo)紋孔及(ji)銑平面加工(gong)流程：
銑(xian)平面→鉆(zhan)螺紋底孔→倒角(jiao)→絲(si)錐攻螺紋。
2.質量管理：
⑴．下(xia)料尺寸據(ju)球直(zhi)徑確定：下(xia)料長度不宜大(da)于圓鋼直(zhi)徑2.5倍。
⑵．螺栓球采(cai)用(yong)45#優質鋼，由250公(gong)斤或750公(gong)斤空氣錘模鍛而成，毛(mao)坯經正火處(chu)理，使其硬(ying)度達到HB197，毛(mao)坯要求無裂紋、過燒、麻點(dian)等缺陷，用(yong)放大(da)鏡(10倍)或磁粉(fen)探傷(shang)檢測(ce)。
⑶．螺(luo)(luo)(luo)栓球切削、銑面、鉆孔、攻絲加工(gong)(gong)(gong)時，應遵守(shou)《切削加工(gong)(gong)(gong)通(tong)用(yong)工(gong)(gong)(gong)藝守(shou)則(ze)》(JB/Z307、JB/Z307.2、JB/Z307.3、JB/Z307.5)有關規定。螺(luo)(luo)(luo)栓球的(de)精加工(gong)(gong)(gong)在C620車床(chuang)上應用(yong)旋轉式(shi)球夾具(ju)進行加工(gong)(gong)(gong)。首先轉動(dong)分(fen)度盤加工(gong)(gong)(gong)各弦桿孔，然后(hou)轉動(dong)夾具(ju)加工(gong)(gong)(gong)腹(fu)桿孔。夾具(ju)的(de)轉動(dong)定位偏差為(wei)±5′，保證了螺(luo)(luo)(luo)紋孔的(de)夾角(jiao)(jiao)加工(gong)(gong)(gong)控制在±30′，之內。加工(gong)(gong)(gong)完畢，用(yong)角(jiao)(jiao)度盤、角(jiao)(jiao)度板和角(jiao)(jiao)度棒進行角(jiao)(jiao)度檢測。
⑷．螺紋(wen)(wen)攻絲(si):有效螺栓深度(du)應不小(xiao)于(yu)螺孔公稱直(zhi)徑的(de)1.2倍，螺紋(wen)(wen)應符合(he)***標準(zhun)《普(pu)遍螺紋(wen)(wen)基本尺(chi)寸》(GB196)中(zhong)粗牙螺紋(wen)(wen)規(gui)定，螺紋(wen)(wen)公差應按《普(pu)通螺紋(wen)(wen)——公差與配合(he)》(GB197)中(zhong)6H級精(jing)度(du)的(de)要求制作。螺孔端面(mian)距球(qiu)(qiu)中(zhong)心允許(xu)偏差為±0.20mm。并對***的(de)螺孔進行抗拉強度(du)檢驗，以螺栓孔的(de)螺紋(wen)(wen)被剪斷時的(de)荷載作為該螺栓球(qiu)(qiu)的(de)極限承載力(li)值。
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