Zero point confirmation and roll centering method for steel pipe changeover

Abstract

Disclosed is a zero confirmation and milling roller centering method for steel pipe replacement forming. The zero confirmation and milling roller centering method for steel pipe replacement forming comprises the steps that the first step, a motor start-stop signal is obtained; the second step, a PROFINET distributed field bus is used, so that data communication between a PLC and an I / O port unit is achieved; the third step, contact type limit switches are installed at the center position and the zero position; the fourth step, data exchange communication between the PLC and an upper control system is achieved through the industrial Ethernet / IP; the fifth step, the PLC transmits the closed states of the limit switches to the upper control system and enables a motor to be braked in a direct connection mode; and the sixth step, according to the closed states of the limit switches, the upper control system and a counter in a data acquisition processor determine whether a milling roller is in a centering state or not or arrives at the zero position or not before replacement forming is conducted, and the control system sends a state control instruction to the motor according to the combination between the rotation direction and the start-stop state of the motor.

Description

technical field [0001] The invention relates to the technical field of large-scale steel pipe changing equipment, in particular to a zero point confirmation and roll centering method for steel pipe changing. Background technique [0002] At present, in steel pipe reshaping technology, before the steel pipe is formed, the steel is leveled, trimmed, planed, surface cleaned and transported, and pre-bent. The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, misalignment and weld gap are strictly controlled. [0003] However, in the production and forming process of steel pipes, different matching rolls are required for different types of steel pipes, and the data of the matching rolls needs to be calculated manually, and the calculation accuracy and speed are difficult to control. When changing the model, it is completely adjusted manually, and the centering and zero position selection are completed by visually m...

AI Technical Summary

Problems solved by technology

The zero point confirmation and roll centering method for steel pipe change can effectively solve the problem of determining the zero point position of the roll during the steel pipe change process, and compared with the manual measurement accuracy of the prior art, the accuracy requirements for the zero point coordinate data are greatly increased.

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