Φ114 mm CPE機(jī)組高精度小直徑薄壁管的生產(chǎn)

Production of Hi-precision,Small-sized and Light-wall Pipes with Φ114 mm CPE Pipe Rolling Plant

摘要: 介紹了Φ114 mm CPE機(jī)組熱軋生產(chǎn)徑壁比>27的Φ89 mm×3.2 mm、Φ108 mm×3.5 mm高精度小直徑薄壁管的工藝方案及控制措施，分析了其生產(chǎn)控制的難點(diǎn)和重點(diǎn)。試制結(jié)果表明：穿孔壁厚偏差控制在7%以內(nèi)和有效控制頂管工序縱向壁厚波動是保障成品尺寸的前提；熱軋生產(chǎn)徑壁比>27、外徑允許偏差（-0.5%～+0.5%）D、壁厚允許偏差（-9%～+9%）S的高精度小直徑薄壁管是可行的。

Abstract: Described in the paper are the process scheme and control measures for production of the Φ89 mm× 3.2 mm and Φ108 mm×3.5 mm hi-precision，small-sized and light-wall pipes with D/S>27 with the Φ114 mm CPE hot-rolling pipe mill.Also analyzed are the control difficulties and key points concerning the production activities. Result of the trial production demonstrates that the preconditions for guaranteeing the finished product dimensions are to get the pierced shell WT deviation within 7%，and properly control the longitudinal WT fluctuation during the push bench process，and that it is practical to use the hot-rolling process to produce the hi-precision，small-sized and light-wall pipe with D/S>27，allowable OD tolerance D as（-0.5%～+0.5%）and allowable WT tolerance S as（-9%～+9%）.