Guide method for online negative deviation control in steel machining process

Abstract

The invention discloses a guide method for online negative deviation control in a steel machining process. The guide method comprises the following steps: arranging loops among all finishing mills, so as to ensure that metal flow is stored among the finished mills, and the loops can be normally opened, delayed and stabilized; constructing a negative deviation control model f(x), setting a sampling interval, and integrating the negative deviation control model f(x) and the sampling interval into a PLC; before steel rolling, averaging the loop adjusting amount of the to-be-rolled steel in a weighted manner by adopting the negative deviation control model f(x), and averaging the loop adjusting amount of the rolled steel after the steel rolling; and performing subtraction on two groups of obtained numerical values by adopting the PLC to obtain the variation delta f of negative deviation, recording the variation delta f of negative deviation into a human-computer interface, and displaying the variation delta f of negative deviation through a site screen, so that the online negative deviation control can be completed by an operator according to the information displayed on the site screen. According to the guide method disclosed by the invention, the operator is guided to complete the online negative deviation control by utilizing the variation of the timely loop adjusting amount, and the guide method has the advantages of being high in control precision, and timely and convenient in guidance.

Description

technical field [0001] The invention belongs to the technical field of metal processing control methods, and in particular relates to an online negative deviation control guidance method in the steel processing process. Background technique [0002] In recent years, as the steel situation has become more severe, ideas such as reducing costs and increasing efficiency, improving indicators, stabilizing performance, and reducing the cost per ton of steel have become the main guiding ideology for various iron and steel enterprises to deal with the cold winter of steel. [0003] In rolling line production, negative deviation control is a key measure to reduce costs, increase efficiency, and improve indicators. It is an important way for enterprises to benefit, but it is also a control problem. There are two main methods: one is to use the steel length negative difference control guidance method, that is, to use the length of the finished product to guide the post workers to carry...

AI Technical Summary

Problems solved by technology

[0003] In rolling line production, negative deviation control is a key measure to reduce costs, increase efficiency, and improve indicators. It is an important way for enterprises to benefit, but it is also a control problem. There are two main methods: one is to use the steel length negative difference control guidance method, that is, to use the length of the finished product to guide the post workers to carry out the negative difference control. However, whether it is the length algorithm of the product of speed and time or the automatic digital steel length measurement The two methods are all due to the fluctuation of the raw material weight, which causes a large error in the change of the steel length; the second is to take a sample after the steel is placed on the cooling bed to make a meter weight, and to calculate the negative difference. There is a lot of uncertainty, so it is impossible to provide fine guidance on the negative deviation. Therefore, there will be empirical methods in the control. Different people have different understandings and different methods. When the company has high negative deviation requirements and strict index control , there will be a negative difference, resulting in the judgment of scrap, when the inspection of the finished product is not timely, a batch of scrap steel will be generated, resulting in the loss of benefits

Images