Process for production of seamless metal pipe by cold rolling

Process for production of seamless metal pipe by cold rolling

  • CN 102,245,320 A
  • Filed: 11/25/2009
  • Published: 11/16/2011
  • Est. Priority Date: 12/24/2008
  • Status: Active Application
First Claim
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1. method of utilizing cold rolling manufacturing seamless metal pipe, this method are to utilize Pierre'"'"'s form cold-rolling mill to make the method for seamless metal pipe, it is characterized in that,With the external diameter of the external diameter of pipe and wall thickness dimension and goods rolled pipe and wall thickness dimension correspondingly, use have diameter from the engaging-in entrance side of pair of rolls towards the roller that processes the diminishing taper pass of oral-lateral and similarly diameter from engaging-in entrance side towards processing the diminishing taper plug of oral-lateralWhen on one side undergauge reduced wall thickness ground on one side and carries out drawing/rolling, making external diameter slip Rd was below 1/2 of wall thickness slip Rt,Wherein, Rd={1-(d/do) } * 100 (%)Rt=

  • {1-(t/to)}×

    100(%

    )Do;

    pipe external diameter, d;

    processing external diameter, to;

    pipe wall thickness, t;

    processing wall thickness.

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