Production process device for rebar with ribs at three sides

Abstract

The invention discloses a production process device for a rebar with ribs at three sides. The device comprises a preprocessing procedure, a rough mill unit, first shearing equipment, a middle mill unit, second shearing equipment, a finishing mill unit, third shearing equipment, a diameter reducing and fixing unit, fourth shearing equipment and a postprocessing procedure which are arranged in sequence; the rough mill unit, the middle mill unit, the finishing mill unit and the diameter reducing and fixing unit all adopt a three-roll mill; crescent-shaped rib grooves matched with the shapes of rib parts at the surface of the rebar with the ribs at three surfaces are marked at the last three-roll mill of the finishing mill unit. The high strength three-roll mills are arranged in the full production line, the rolling capacity is large, large compression in one single path can be realized and guarantee is provided for producing a fine grain rebar; in addition, temperature control water tanks are arranged at multiple positions of the production line, so a rolled piece is subjected to online temperature control and cooling by mediums such as air and water, and the ordered production of the threaded rebar with high strength level can be realized by matching the reasonable temperature window of the rolled piece and the large compression process of the mills.

Description

Technical field [0001] The invention belongs to the field of iron and steel metallurgy, and specifically relates to a process arrangement of ribbed threaded steel bars on three sides. Background technique [0002] The use of a two-roll mill to roll ribbed rebars on both sides is a well-known technique for rebar rolling. [0003] With the progress and development of the country, large-scale infrastructure and urbanization are inseparable from rebar used in construction. The output of rebar in 2013 has exceeded 200 million tons, accounting for 20% of my country's steel production capacity. The national competent authorities have also successively introduced relevant policies to accelerate the elimination of 335MPa steel bars in construction projects, give priority to the use of 400MPa steel bars, and actively promote 500MPa steel bars. [0004] While gradually increasing the strength level of the rebar, how to fully integrate the rebar and concrete is also an issue that technicians m...

AI Technical Summary

Problems solved by technology

[0005] However, the existing threaded steel bars are ribbed on both sides from the cross section, while the other two sides are not ribbed.

When the building is subjected to external forces from multiple directions, the bonding degree between the non-ribbed surface of the steel bar and the concrete is not tight, and it is easy to fall off after being stressed. In addition, the strength level of the existing threaded steel bar is low, which in turn creates a safety hazard for the building

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