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    CPE工藝改良芻議

    Discussion on Modification of CPE Process

    • 摘要: 介紹了目前CPE機組的主要工序，提出了卡環(huán)（擋叉）在線脫棒、行星松棒機在線松棒、脫管機離線脫管、用四輥輥模替代三輥輥模，以及旋壓加工縮口部位減少切頭損失的工藝改良設(shè)想。分析認(rèn)為：實現(xiàn)在線脫/松棒，可縮短工藝流程、提高荒管溫度、延長芯棒使用壽命；而用四輥輥模替代三輥輥模，可使定（減）徑后的鋼管由“內(nèi)六方”變?yōu)椤皟?nèi)八方”，從而改善鋼管壁厚精度。

       

      Abstract: Described here in the essay are the currently-used main operation steps of the CPE pipe mill.Relevant modification suggestions are put forward，including on-line mandrel extracting with a clasp（block fork），on-line mandrel loosening by planetary mandrel loosening mill，off-line pipe extracting by extracting mill，replacing the 3-roll die with the 4-roll die，and pointing via spinning process to reduce metal loss from cropping，etc. Relevant analysis leads to the following conclusion. Thanks to the on-line mandrel extracting/loosening operation steps，the manufacturing process flow will be shortened，the shell temperature raised，and the mandrel service span expanded，while due to replacement of the 3-roll die with the 4-roll die，the inner profile of the pipe as sized（reduced） will be turned from“the hexagonal”into“the octagonal”，and thus the pipe’s wall thickness accuracy will be improved.

       

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