Simultaneous manufacture of multiple billets

Abstract

Abstract PURPOSE:To simultaneously manufacture multiple billets without causing such defects as shear dropps, by shearing necked parts connecting square corners of a couple of billet forming segments after cooling with cooling water. CONSTITUTION:Plural billet forming segments having a square section are connected at each of opposite square corners so as to form necked parts 10, 11 in a semifinished product consisting of segments parallelly laid in one body; this semifinished product is subjected to a continuous rolling process. Hereupon, the semifinished product is introduced into a cooling apparatus wherein the cooling water 22 is sprayed from the spray nozzles 21 arranged on upside and downside of said necked parts 10, 11 which are then exclusively cooled to about 250-400 deg.C. Then, this semifinished product is fed between a couple of rolls 23, 24 provided with calibers 25, 26; hereby, the necked parts 10, 11 are sheared off by cooperating calibers 25, 26 and shearing edges 27, 28. By the present method, plural billets having sheared planes at an excellent surface condition are simultaneously obtained with a minimum energy loss.

Inventors

• 👤 Hisashi Nagahiro
• 👤 Teruaki Tanaka

Bibliographic Details