Technological method for symmetrical paired universal rolling of deformed steel

Abstract

The invention discloses a technological method for the symmetrical paired universal rolling of deformed steel. The technological method comprises the following steps of: (1) roughly rolling a raw blank into an intermediate blank of a double-connected rolling piece in a rough rolling unit; (2) cutting off irregular deformed head and tail parts of the intermediate blank by using a sawing and shearing facility; (3) simultaneously carrying out fine rolling on the intermediate blank of the double-connected rolling piece in a fine rolling unit to obtain a double-connected final-section sectional bar; and (4) cooling the rolled double-connected final-section sectional bar to room temperature, and subdividing and straightening the double-connected final-section sectional bar to obtain single final-section sectional bar products through subdividing and straightening facilities. The technological method disclosed by the invention is wide in application range and suitable for rolling various deformed steels, solves the existing problem of post-cooling bending of the single rolled deformed steel, simultaneously optimizes a rolling production line, reduces energy consumption of production, equipment loss and production cost, and improves the production efficiency, and in addition, the rolled piece is good in surface quality, small in internal stress, and good in comprehensive machining quality and mechanical performance.

Description

technical field [0001] The invention relates to a metal rolling method, in particular to a process method for symmetrical double universal rolling of special-shaped steel. Background technique [0002] Sectional steel is a straight strip steel with a definite cross-sectional shape and a relatively large ratio of length to section perimeter. It is widely used in construction, transportation, bridges, ships, electric power, machinery and other industries. Due to its special section, its rolling processing production method is also relatively complicated and difficult. The rolling methods mainly include ordinary two-roll rolling method and four-roll universal rolling method. Section steels of specific types and specifications require specific rolls and passes to complete the rolling from the original billet to the final finished product section. [0003] At present, except steel rails, H-beams, I-beams and other products that can be rolled by the four-roll universal rolling me...

AI Technical Summary

Problems solved by technology

[0007] 1) The sawing process of sawing facilities such as hot saws or hot shears after final rolling increases, saw blades and energy consumption increase;

[0008] 2) There are many short-length rolling pieces on the cooling bed, the control program of the cooling bed is complicated, and the production management cost increases;

[0009] 3) The number of straightening times increases, the production pace slows down, and the head / tail blind area of ​​the straightened rolled piece increases;

[0010] 4) The number of head / tail cuts of cold saw cutting to length increases, the consumption of saw blades is large, and the cost of saw blades is high;

Images