Threaded rib anchor rod steel bar hot rolling process and device

Abstract

The invention discloses a thread rib anchor rod reinforcing steel bar hot rolling process which comprises the following steps: after a reinforcing steel bar is rolled into a circular material type in a rough and intermediate rolling stage, roller hole types adopted in a finish rolling stage are a flat rolling hole type, a vertical box hole type, a pre-splitting hole type, a splitting hole type, a flat oval hole type and a thread rib hole type in sequence; wherein the K1 roller phase connecting shaft adopts a crankshaft type connecting shaft. According to the inner inclined spline shaft sleeve, rotation of the roller end inner gear ring and the roller end outer gear shaft sleeve is achieved through the flat keys, so that a connected roller thread rib circular hole is driven to achieve micro-rotation, the requirement for rib size precision is met, produced thread rib anchor rod steel bars have excellent size precision, surface quality and rib precision, and the service life of the thread rib anchor rod steel bars is prolonged. The production efficiency can be effectively improved, and the rolling cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically relates to a hot-rolling process and device for a threaded rib anchor rod steel bar. Background technique [0002] At present, threaded rib resin anchors and spin anchors are mostly used in China (that is, hot-rolled ribbed steel bars for continuous contour thread rib anchors). Due to the obvious advantages of spin anchors, the use methods and market usage in recent years is increasing substantially. However, the hot-rolled ribbed steel bars for continuous equal-height rib anchor rods have been produced in a single line. Compared with the rebar slit rolling, the production efficiency is relatively low, and the rolling processing cost is relatively high. There are the following technical difficulties in the development of hot-rolled ribbed steel bars for equal-height threaded rib anchor rods: the height of the transverse rib is high, and the first problem is K1 bursting a...

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Problems solved by technology

However, hot-rolled ribbed steel bars for continuous equal-height rib anchor rods have been produced in a single line. Compared with rebar slit rolling, the production efficiency is relatively low, and the processing cost of steel rolling is relatively high.

There are the following technical difficulties in the development of hot-rolled ribbed steel bars for equal-height threaded rib anchor rods: the height of the transverse rib is high, and the first problem is K1 bursting and meat loss; the rib precision is high, so the phase adjustment devices require very high precision

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