A Method for Controlling Dimensional Accuracy of Wire Rod Rolling

Abstract

The invention provides a method of controlling wire rod rolling dimensional precision. The method comprises the following steps: (1) determining the roller diameter difference of rollers before rolling, reducing the roller diameter proportion of a reducing sizing rolling mill, the speed ratio difference of a reducing sizing mill unit, the guiding steel passing quantity and the rolling temperature;and (2) starting steel rolling, and controlling the vibrating value of the rolling mill, the rolling coefficient of elongation, the clutch shift, the speed ratio of the clutch and the advance coefficient of a spinning machine in the steel rolling process. The method can solve the problem that tension of the reducing sizing mill unit in a high speed rolling process is unstable, and improves the steel rolling speed and the product precision.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a method for controlling the dimensional accuracy of wire rod rolling. Background technique [0002] Great power manufacturing and national strategies require a large number of high-quality special steel wires, whose surface and dimensional accuracy have always been the focus of users' attention. At present, the user's requirements for surface quality defects have reached a depth of 20μm, and the full coverage of wire rods can be detected through online eddy current flaw detection; the requirements for dimensional accuracy range from B-grade accuracy to 100% C-grade accuracy, and the dimensional fluctuation is within ±0.1mm. In the production process of steel mills, due to the direct connection between output and efficiency, it is urgent to solve the problem of high precision in the high-speed production process. [0003] In order to achieve the purpose of high...

AI Technical Summary

Problems solved by technology

However, the fluctuation of dimensional accuracy in the process of producing small-size wire rod products has always plagued steel mills. Sometimes, in order to meet the needs of users, it is necessary to cut the head and tail for more than 30 turns, and the yield loss is about 0.1%.

Even if the production line is equipped with high-precision heavy-duty rolling mills and reducing and sizing equipment, there is still excessive tension between the reducing machine and the sizing machine, resulting in necking and breaking of the drawn steel

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