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                                                                                                                                    熱擴大口徑直縫鋼管產品展示

                                                                                                                                    作者:滄州市大唐管業有限公司來源:http://www.locasity.com/時間:2019/01/18 點擊:0

                                                                                                                                      熱擴是鋼管的一種加工方式,是把小口徑直縫鋼管加工成熱擴大口徑直縫鋼管。熱擴大口徑直縫鋼管比熱軋鋼管機械性能稍差一些。

                                                                                                                                      熱擴大口徑直縫鋼管的高頻焊接過程是在高頻焊管機組中完成的。高頻焊管機組通常由滾壓成型、高頻焊接、擠壓、冷卻、定徑、飛鋸切斷等部件組成,機組的前端配有儲料活套,機組的后端配有鋼管翻轉機架;電氣部分主要有高頻發生器、直流勵磁發電機和儀表自動控制裝置等組成。熱擴直縫鋼管指的是在直縫鋼管的基礎上通過擴徑技術進行擴大達到客戶所需要的用途。直縫鋼管有兩種工藝雙面埋弧焊和高頻焊接,雙面埋弧焊可以制作直徑達1500左右的直縫鋼管,我們現在所說的擴管主要是指高頻焊管,有兩點原因一高頻焊管本身的生產口徑比較小,所以要擴大。

                                                                                                                                      熱擴大口徑直縫鋼管種類繁多,按照用途:一般焊管、吹氧焊管、鍍鋅焊管、電線套管、托輥管、公制焊管、汽車用管、深井泵管、變壓器管、電焊異型管、電焊薄壁管。

                                                                                                                                      熱擴大口徑直縫鋼管按生產工藝可分為高頻直縫鋼管和埋弧焊直縫鋼管。熱擴大口徑直縫鋼管按其不同的成型方式又分為UOE、RBE、鋼管等。下面介紹常見的高頻直縫鋼管和埋弧焊直縫鋼管的成型工藝。

                                                                                                                                      埋弧焊工藝

                                                                                                                                      1. 板探:用來制造大口徑埋弧焊直縫鋼管的鋼板進入生產線后,首先進行全板超聲波檢驗;

                                                                                                                                      2. 銑邊:通過銑邊機對鋼板兩邊緣進行雙面銑削,使之達到要求的板寬、板邊平行度和坡口形狀;

                                                                                                                                      3. 預彎邊:利用預彎機進行板邊預彎,使板邊具有符合要求的曲率;

                                                                                                                                      4. 成型:在JCO成型機上首先將預彎后的鋼板的一半經過多次步進沖壓,壓成"J"形,再將鋼板的另一半同樣彎曲,壓成"C"形,后形成開口的"O"形

                                                                                                                                      5. 預焊:使成型后的直縫焊鋼管合縫并采用氣體保護焊(MAG)進行連續焊接;

                                                                                                                                      6. 內焊:采用縱列多絲埋弧焊(多可為四絲)在直縫鋼管內側進行焊接;

                                                                                                                                      7. 外焊:采用縱列多絲埋弧焊在直縫埋弧焊鋼管外側進行焊接;

                                                                                                                                      8. 超聲波檢驗Ⅰ:對直縫焊鋼管內外焊縫及焊縫兩側母材進行的檢查;9. X射線檢查Ⅰ:對內外焊縫進行100的X射線工業電視檢查,采用圖象處理系統以保證探傷的靈敏度;

                                                                                                                                      10. 擴徑:對埋弧焊直縫鋼管全長進行擴徑以提高鋼管的尺寸精度,并改善鋼管內應力的分布狀態;

                                                                                                                                      11. 水壓試驗:在水壓試驗機上對擴徑后的鋼管進行逐根檢驗以保證鋼管達到標準要求的試驗壓力,該機具有自動記錄和儲存功能;

                                                                                                                                    標簽:

                                                                                                                                    上一篇:高頻直縫鋼管

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