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用滚动模拔制异型钢管的实质,是拉拔与轧制组合的拔轧过程,其轧辊不用电机驱动,是靠拉拔件摩擦带动而实现变形的。用滚动模代替固定模拔制异型钢管,具有生产率高,模具寿命长,拔制能耗低等优点。实践表明,它对拔制时的润滑条件无过高要求,因此尚有高速拔制的潜力。经一年多摸索探讨,已成批生产了椭圆、方、矩形钢管共七十余吨,规格自12×6×1mm椭圆管至70×50×4mm矩形管等七个品种,其中薄壁的占15％左右。本文简介滚动模生产异型钢管工艺参数,拔制方式,孔型及模具设计,壁厚变化等问题。
With the essence of rolling profiled profiled steel pipe is the drawing and rolling combination of the process of pulling and rolling, the roller without motor-driven, is driven by the drawing friction and deformation. Rolling die instead of fixed-mode drawn special-shaped steel pipe, with high productivity, long mold life, drawing low energy consumption advantages. Practice shows that it has no excessive requirements for lubrication conditions during drawing, so there is still potential for high-speed drawing. After more than a year of exploration and exploration, a total of more than seventy tons of oval, square and rectangular steel pipes have been produced in batches, ranging from 12 × 6 × 1mm oval pipes to 70 × 50 × 4mm rectangular pipes and other seven varieties, of which thin-walled Accounting for about 15%. This article describes the production of profiled steel pipe rolling process parameters, drawing mode, hole and mold design, wall thickness changes and other issues.