Rolling method of small size straight ribbed round steel

Abstract

The invention relates to the field of metal rolling for rolling workpieces with special cross-sectional shapes, in particular to a method for rolling small-sized straight ribbed round steel. A method for rolling small-sized straight ribbed round steel, which is characterized in that: the following steps are followed in sequence: a. using a finishing mill for split rolling; b. using two tension reducing sizing mills for rolling; c. using Cutting by high-speed double-foot flying shear; d. Rapid braking is realized by the brake pinch roller; e. Input cooling bed through the feeding device for cooling. The invention has high quality and precision of rolled pieces, high production efficiency and wide application range.

Description

technical field [0001] The invention relates to the field of metal rolling for rolling workpieces with special cross-sectional shapes, in particular to a method for rolling small-sized straight ribbed round steel. Background technique [0002] Round steel with a diameter of less than 10mm is collectively referred to as small-sized round steel. At present, my country's national standard "Steel for Reinforced Concrete Part II: Hot-rolled Ribbed Steel Bars (GB1499.2-2007)" stipulates two sizes of 6mm and 8mm. Specifications of straight ribbed round steel, the front view and top view of straight ribbed round steel are as follows figure 1 and figure 2 shown. With the refined development of building structure technology, small-sized ribbed round steel will be widely used, so the process of rolling small-sized ribbed round steel will gradually show its due value. [0003] Taking China as an example, the current rolling process of straight ribbed round steel is to pass the contin...

AI Technical Summary

Problems solved by technology

Due to the limitation of the number of finishing mill configurations and the limitation of total elongation, the specifications of 6mm and 8mm cannot be rolled. Even if a small section billet is used, the multi-slitting technology cannot guarantee the tolerance between the rolled pieces of 6mm and 8mm.

At the same time, due to the relatively large size of the rolling mill and the long distance between the rolling mills, the response of the single-drive cascaded speed regulation is relatively slow, and it is impossible to guarantee the cleaning rod tolerance of 6mm and 8mm rolled pieces

Therefore, the existing production process is difficult to roll 6mm and 8mm ribbed round steel

In addition, the cooling bed feeding device currently configured is a "skirt-type feeding device", and the movement gap of the mechanism is relatively large. Small-sized rolled pieces are easy to get caught in the gap during transportation, and it is easy to "stack steel", which makes the production of the unit unable to operate normally. , it is also difficult to cooperate with the rolling mill to complete the rolling of 6mm and 8mm straight ribbed round steel

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