Method of piercing in seamless tube manufacturing

Details Method of piercing in seamless tube manufacturing Method of piercing in seamless tube manufacturing

B - Operations, Transporting

21

B

80/13

B21B 19/04 (2006.01)

Patent

CA 1185814

ABSTRACT OF THE DISCLOSURE The invention relates to a method of rotary piercing in seamless tube manufacturing under a rotary piercing process, such as Mannesmann mandrel mill process. Rotary piercing operation is carried out by employing a rotary piercing mill having a pair of cone-shaped main rolls adapted to cooperate with a plug for rotary piercing and disc rolls disposed in opposed relation between the pair of main rolls and adapted to press hollow shell on the surface thereof. In this method of rotary piercing, the main rolls have feed and cross angles designed to meet certain conditions individually and in combination. The method makes it possible to carry out rotary piercing of less hot workable and/or extremely hard-to work materials, that is, high-alloy steel billets, without surface tor- sional deformation and circumferential shear deformation. Thus, it is possible to manufacture high quality tubes of high-alloy, steels free from outside seams and inside bore defects. - 27 -

393770

Affiliated with

Also associated with

Rating

Method of piercing in seamless tube manufacturing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of piercing in seamless tube manufacturing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of piercing in seamless tube manufacturing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1252743