Thermomultiplying ruler shear precision optimizing method for bar production

Abstract

The present invention relates to a thermal multiple-length shearing accuracy optimization method in production of rod material, belengting to the field of pressure processing technology for raising rod material shearing accuracy. Said invention uses two rotating speed pulse coders and two hot-metal detectors as speed-measuring sensor and uses a programmable controller as speed-measuring controller. Its optimization method includes the following steps: firstly, utilizing shearing point of thermal multiple length shears and two hot-metal detectors after shearing operation to detect out the line speed of every thermal multiple length steel; then utilizing sail line speed to calculate the 'virtual roll diameter' value which can be used to reach said line speed under the rotating speed of said finished product rolling mill; transferring the 'virtual roll diameter' value into tength-measuring program and substituting original inputted roll diameter value; after every shearing operation repeating the above-mentioned steps. The invented shearing accuracy can be up to plus or minus 50mm.

Description

technical field [0001] The invention relates to a method for measuring the rolling length of a metal bar, belonging to the technical field of pressure processing. Background technique [0002] In the production of small bars, after the steel billet (135mm2~165mm2) is rolled by the rolling mill, the real-time cumulative length of the finished steel passing through the center line of the thermal scale shearing blade is calculated by detecting the motor speed of the finished rolling mill and the diameter of the roll. , when the cumulative length value is greater than or equal to the set thermal scale length value, the control program will send a shear command to the scale shears to cut the finished steel into thermal scale steel with a set length. The length measurement of this finished steel is called thermal scale length measurement. [0003] At present, there are mainly two types of thermal scale length measurement for bars: roll diameter measurement and hot metal detector ...

AI Technical Summary

Problems solved by technology

However, because it assumes that the relative slippage between the rolling material rolled by the same billet and the rolls of the finished stand is basically unchanged, it cannot effectively deal with the relative slippage between the rolling stock produced by the same billet and the rolls of the finished stand. There is still a certain error in the length measurement between the thermal scales produced by the same billet

Images