Control method for acid washing and edge cutting of super low carbon soft steel

Abstract

This invention provides a controlling method for acid washing and edge-trimming for super-low carbon soft steel including: transmitting an edge-trimming parameter of a level and vertical clearance value of a disk scissor to a primary PLC to adjust the motor to arrive at the control position, in which, the edge-trimming parameter value sent to the PLC is computed by a process computer to a math model in the linearity relation to the thickness of the raw material, which reduces interference by man and increases the cutting accuracy.

Description

technical field [0001] The invention relates to a strip steel shearing technology, in particular to a control method for pickling edge trimming of ultra-low carbon mild steel. Background technique [0002] In recent years, with the rapid development of the automobile industry and the fierce competition in the automobile market, the requirements for the deep drawability, corrosion resistance and high strength of the automobile sheet are getting higher and higher, thus prompting the need for a surface with high strength and good deep drawing performance The demand for steel sheets has increased significantly, and these high-tech automotive sheets are provided to automobile factories after galvanizing, which requires that the galvanized substrates provided by cold rolling meet the requirements of sheet shape and thickness. Also have good edge quality. Since the carbon content of ultra-low carbon steel is very low, generally less than 0.003%, the material is very soft and it is...

AI Technical Summary

Problems solved by technology

There are certain errors in the empirical values ​​of different thicknesses obtained in this way, which need to be manually adjusted repeatedly, resulting in unstable trimming quality

Its defects mainly have two forms: one is the edge burr caused by the unreasonable shear gap, which will hang zinc when galvanized and cause the edge of the galvanized product to thicken; the other is the shear The cutting force state is not good, resulting in frequent chipping

In various cold rolling production lines in the world, edge trimming of ultra-low carbon steel has always been a recognized problem. We have tried the empirical parameters of a famous foreign steel company, but we have not achieved good results in the production line.