【正文】 ................................................................... 6 管坯加熱爐 ............................................................................................... 6 冷床 .......................................................................................................... 8 分段鋸 ....................................................................................................... 8 3 生產(chǎn)工藝流程及工藝制度 .................................................................................... 10 生產(chǎn)工藝流 程圖 ............................................................................................... 10 .................................................................................. 10 熱軋工藝流程圖 ..................................................................................... 10 油管生產(chǎn)工藝流程圖 .............................................................................. 11 連軋工藝流程圖 ..................................................................................... 13 生產(chǎn)工藝流程簡述 ........................................................................................... 13 熱區(qū)生產(chǎn)工藝過程 ................................................................................. 13 精整車間生產(chǎn)工藝 ................................................................................. 15 工藝制度 ........................................................................................................... 16 溫度制度 ................................................................................................. 16 孔型系列及變形制度 ............................................................................. 17 技術規(guī)程 .......................................................................................................... 18 管坯準備 ................................................................................................ 18 管坯加熱 ................................................................................................ 20 管坯穿孔 ................................................................................................. 21 共 5 頁 第 2 頁 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 空心坯減徑 ............................................................................................. 23 鋼管連軋 ................................................................................................. 23 再加熱 ..................................................................................................... 24 張力減徑 ................................................................................................. 26 冷床 ........................................................................................................ 28 鋸切 ........................................................................................................ 28 4 軋制表計算 ................................................................................................................. 28 軋制表計算的條件（基本參數(shù)和極限值） ..................................................... 28 軋件長度 ................................................................................................ 28 張減機減徑系列 ..................................................................................... 28 孔型系統(tǒng)的確定 ............................................................................................... 29 主孔型 —— 連軋管外徑的確定 .............................................................. 29 不同系列組合分工 ................................................................................. 30 圓孔與橢孔的選擇 ................................................................................. 30 孔型配置 ................................................................................................. 31 ....................................................................................................... 31 計算步驟 ................................................................................................. 31 管坯直徑 ........................................................................................................... 34 管坯質(zhì)量計算 ................................................................................................... 35 標準管坯重量 BG 能最大程度發(fā)揮機組生產(chǎn)能力 ................................. 35 最小坯料重量 ......................................................................................... 35 金屬平衡表計算 ............................................................................................... 36 計算熱區(qū)有效收得率 EWA.................................................................... 36 計算實際長度 ......................................................................................... 37 金屬平衡表 ............................................................................................. 37 穿孔頂頭直徑及頂桿直徑 ................................................................................ 37 頂頭直徑 ................................................................................................. 37 ganD 的選擇 .............................................................................................. 38 穿孔調(diào)整參數(shù) ......................................................................................... 38 輥距 Bck [11] .............................................................................................. 38 共 5 頁 第 3 頁 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 頂頭前伸量 b .......................................................................................... 38 頂桿位置： ............................................................................................. 38 導盤輥距 ckL ......................................