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    防止冷拔薄壁無縫鋼管尾部產(chǎn)生縱向螺旋形壁厚不均的技術(shù)探討

    Technical Approach to Prevention of Longitudinal Spiral Eccentricity in Tail End of Cold-drawn Light-wall Seamless Steel Pipe

    • 摘要: 結(jié)合冷拔薄壁無縫鋼管拔制工藝的特點(diǎn),通過分析鋼管在帶芯棒拔制時(shí)的變形過程,系統(tǒng)地闡述了拔制過程中產(chǎn)生“甩尾”現(xiàn)象的原因及其對縱向螺旋形壁厚不均的影響。同時(shí),針對薄壁鋼管的生產(chǎn),從冷拔工藝和模具設(shè)計(jì)角度提出了防止冷拔鋼管尾部產(chǎn)生縱向螺旋形壁厚不均的可行措施。

       

      Abstract: With consideration of the characteristics of the manufacturing process for cold-drawn light wall seamless steel pipes,the deformation process of the pipe as being drawn over the mandrel is analyzed. Also elaborated are the causes responsible for the so-called “tail swing” as occurs during drawing of the pipe,and the negative influence thereby on the said spiral eccentricity. Meanwhile,practical actions are proposed to prevent the above mentioned eccentricity of the cold-drawn pipe in terms of the cold-drawing process and design of the dies.

       

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