A steel rolling production line that can realize the controlled cooling requirements of various alloy steel bars after rolling

Abstract

The invention provides a rolled steel production line capable of meeting after-rolling cooling control requirements of multiple alloy steel bars. The rolled steel production line comprises a rolling mill (1), double-rule flying shears (3), a hot bed (4), a cold bed (5), a first saw (6) and a second saw (7); the temperature lowering amplitude of a rolled piece (12) on the hot bed (4) is smaller than that of the rolled piece (12) on the cold bed (5), the hot bed (4) comprises an input roller way (41), a transverse travel trolley (44) and an output roller way (47), the input roller way (41) of the hot bed (4) is located between the double-rule flying shears (3) and the cold bed (5), and the output roller way (47) of the hot bed (4) is located between the first saw (6) and the second saw (7). According to the rolled steel production line capable of meeting the after-rolling cooling control requirements of multiple alloy steel bars, not only can the requirements of a high-temperature slow cooling material on the high collecting temperature be met, but also the high-yield requirement of a low-temperature slow cooling material and the high-yield requirement of a conventional cooling material are both taken into account.

Description

technical field [0001] The invention relates to the field of steel rolling equipment, in particular to a steel rolling production line capable of realizing the requirements of controlled cooling after rolling of various alloy steel bars. Background technique [0002] Different alloy steel long products have completely different requirements on the controlled cooling process after rolling. For example, bearing steel and spring steel require rapid cooling and then slow cooling at low temperature after rolling, while gear steel requires rapid collection to achieve high temperature and slow cooling after rolling. Therefore, different processing methods should be used to produce different alloy steel grades. However, the layout of the post-rolling area of ​​the current long steel rolling workshop is relatively simple, and it is difficult to meet the production process requirements of various steel types. The main shortcomings are as follows: [0003] 1. The existing steel rollin...

AI Technical Summary

Problems solved by technology

However, the layout of the post-rolling area of ​​the current long steel rolling workshop is relatively simple, and it is difficult to meet the production process requirements of various steel types. The main shortcomings are as follows:

[0003] 1. The existing steel rolling production line is equipped with a water cooling box 2, a cooling bed 5, a cut-to-length saw (including the first saw 6, the second saw 7, the third saw 8 and the fourth saw 9), and a collection table in the post-rolling area devices such as figure 1 As shown), the high-temperature slow-cooling material and the low-temperature slow-cooling material both adopt the same process route, but the process layout and equipment structure design are mainly to meet the requirements of cooling to low temperature, and it is difficult to take into account the requirements of high-temperature slow cooling temperature

[0004] 2. Some production lines have added a chain device that can move quickly across the cooling bed, but the structure of the cooling bed is complicated, the failure rate is high, and maintenance is difficult, and the actual utilization rate is not high in the end.

[0005] 3. In order to achieve a higher hourly output, 4 fixed-length saws are installed behind the cooling bed to cut to fixed lengths. However, the arrangement of the sawing area is too long, which increases the passage time of steel materials and cannot meet the requirements of high-temperature slow-cooled materials for collection temperature.

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