Efficient bar rolling process and production line

Abstract

The invention belongs to the technical field of steel rolling, and in particular discloses an efficient bar rolling process and production line. The production line comprises a rough rolling unit, a flying shear, a medium rolling unit, a first temperature control water tank, a flying shear, a first finish rolling unit, a second temperature control water tank, a flying shear, a second finish rolling unit, a third temperature control water tank and a flying shear arranged successively along a rolling direction. Each of the rough rolling unit and the medium rolling unit comprises a plurality of rolling mills arranged alternately successively: horizontal-vertical or vertical-horizontal. The first finish rolling unit comprises six rolling mills arranged successively: horizontal-vertical-horizontal-horizontal / vertical-horizontal-horizontal. The second finish rolling unit comprises three rolling mills arranged successively: horizontal-horizontal-horizontal / vertical. By adopting the productionline, a single bar can be produced and bars can be produced on 2-6 lines. The production line meets efficient production of twisted steel of small, medium and large specifications, so that addition of alloy elements can be reduced and the production cost can be lowered while the capacity is improved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a bar high-efficiency rolling process and production line. Background technique [0002] With the development and progress of the country, large-scale infrastructure and urbanization construction are inseparable from the threaded steel bars for construction. In 2019, the output of threaded steel bars has exceeded 200 million tons, accounting for 20% of my country's total steel production capacity and 40% of long product production capacity. Eliminating low-strength steel bars and promoting high-strength and high-performance steel bars is the main trend in the domestic market. At the end of 2018, the country promulgated a new standard "Steel for Reinforced Concrete Part 2: Hot-rolled Ribbed Steel Bars". [0003] In order to achieve high-strength performance of rebar products, there are currently three mainstream production processes: [0004] (1) Through the strong water p...

AI Technical Summary

Problems solved by technology

However, under this kind of process, the ordinary high-temperature bar cutting process and production line configuration can no longer be realized. Usually, it needs to be realized through the configuration of single tall bar and double split tall bar.

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