基于均勻磁化的SAWH焊管無(wú)級(jí)直流在線兩點(diǎn)消磁法
Homogeneous Magnetization-based Infinite DC On-line 2-point Demagnetization Process for SAWH Pipes
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摘要: 簡(jiǎn)要介紹了SAWH焊管的消磁理論和國(guó)內(nèi)常用的消磁方法, 重點(diǎn)介紹了基于均勻磁化的SAWH焊管無(wú)級(jí)直流在線兩點(diǎn)消磁法, 即在SAWH焊管制造主機(jī)后橋設(shè)置第一消磁點(diǎn), 在X射線探傷室設(shè)置第二消磁點(diǎn)。采用該消磁法時(shí), 借助于X射線工業(yè)電視圖像來(lái)精確判別、調(diào)整消磁磁場(chǎng)的大小, 從而有效地對(duì)SAWH焊管進(jìn)行消磁, 防止剩磁的反彈, 實(shí)現(xiàn)了以簡(jiǎn)單的設(shè)備和精細(xì)化的控制來(lái)獲得較理想的消磁效果Abstract: Briefed are the demagnetization theory and the demagnetization processes as commonly used for SAWH pipes. Focused on is the homogeneous magnetization-based infinite DC on-line 2-point demagnetization process for SAWH pipes,which involves setting up the No.1 demagnetization point at the outlet table of the SAWH pipe mill proper,and the No.2 demagnetization point in the X-ray detection room. In case of using this demagnetization process, the demagnetization field size is accurately identified and adjusted via the picture of the X-ray industrial TV, and thus adequate demagnetization of the SAWH pipe is obtained,and rebounding of remanent magnetization is prevented. And in this way,satisfactory demagnetization is realized by means of simplified equipment and fine control process.
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