MY105430A - No-twist slit-rolling approach ( "nta" ) apparatus and method for manufacturing steel reinforcing rod - Google Patents

Abstract

A NO- TWIST ("NTA") APPARATUS AND METHOD FOR MANUFACTURING STEEL REINFORCING BAR WHICH ALLOWS STEEL REINFORCING BAR TO BE MANUFACTURED WITH GREATER SPEED AND PRECISION THAN BY CONVENTIONAL METHODS. THE NTA METHOD EMPLOYS NUMEROUS STANDS, WITH THE SHAFTS OF THE ROLLS OF THE FIRS TWO STANDS OFFSET 45? FORM A PREDETERMINED PLANE AND 90? FROM EACH OTHER. THE THIRD AND FOURTH STANDS COMPRISE ROLLING AND SPLITTING STANDS AND THE SHAFTS OF THEIR ROLLERS ARE PERPENDICULAR OR PARALLEL TO THE PREDETERMINED PLANE AND FORM EQUAL ANGLES WITH THE SHAFTS OF THE FIRST TWO STANDS SO THAT THE BAR CAN BE FED TOTHE ROLLING AND SPLITTING STANDS WITHOUT INTERMEDIATE TWISTING AND THE SINGLE BAR CAN BE SPLIT INTO A PLURALITY OF BAR SEGMENTS. THE REMAINING STANDS ARE ARRANGED INTO AT LEAST TWO LINES OF STANDS ARE ARRANGED INTO AT LEAST TWOLINES OF STANDS, IN EACH OF WHICH THE SIDES OF THE ROLLS OF THE FIRST STAND ARE OFFSET 45? IN A FIRST DIRECTION FROM THE PREDETERMINED PLANE AND THE SIDES OF THE ROLLS OF THE SECOND STAND ARE OFFSET 45? IN A SECOND DIRECTION OPPOSITE TO SAID FIRST DIRECTION RELATIVE TO THE PREDETERMINED PLANE. ALTERNATIVELY, THE SIDES OF THE ROLLS OF THE FIRST AND SECOND STANDS IN THE TWO LINES ARE REPECTIVELY OFFSET EITHER BY 90? AND 0? OR 0?AND 90?.