End shearing method in middle-thickness plate rolling process

Abstract

The invention discloses an end shearing method in a middle-thickness plate rolling process, and relates to the technical field of metal pressure processing. A shot rolled piece side face image signal is transmitted to a computer to be processed, rolled piece side face size data obtained through processing of the computer, a signal of a metal detector installed in front of a heavy shear and a signal of a rotary encoder installed at the shaft end of a conical roller arranged on a delivery roller way are transmitted to a PLC system, the rotary encoder turn number which is generated when the cocking portion at the head end of a rolled piece and the cocking portion at the tail end of the rolled piece are sheared and corresponds to the position of the roller piece is calculated through the PLC system, and then the rolled piece is delivered to the position which is calculated in advance though the roller way to be subjected to end shearing. The method comprises the following steps that 1, the length of the cracking portions of the ends of the rolled piece is detected and calculated; 2, locating calculation and control are performed on the rolled piece of which the back cracking portion is sheared; 3, locating calculation and control are performed on the rolled piece of which the front cracking portion is sheared. According to the method, the problem that in the rolling process of middle-thickness plates, the cracking portions of the ends of the rolled piece cannot be precisely located and sheared is solved.

Description

technical field [0001] The invention relates to the technical field of metal pressure processing, in particular to a method for shearing the "mouth opening" parts at both ends formed in the rolling process of a medium-thick plate. Background technique [0002] In the rolling process of medium and thick plates, in the previous pass of rolling, when the thickness of the rolled piece is large, the reduction amount of each pass cannot go deep into the middle of the ingot, and most of the metal deformation only occurs On the upper and lower surfaces of the rolled piece, after multiple passes of rolling, often forms such as figure 2 The head and tail ends of the rolled piece shown have "open mouths", also known as "crocodile mouths", that is, upper and lower cracks are formed at both ends of the rolled piece, which makes roll entanglement accidents very prone to occur in the subsequent rolling process. Therefore, it is necessary to cut off the cracked part of the end of the rolle...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an end shearing method in the rolling process of medium and heavy plates, which can solve the problem that the cracked part at the end of the rolled piece cannot be accurately positioned and cut during the rolling process of medium and heavy plates

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