A kind of production method of anchor rod steel

Abstract

The invention discloses a production method of an anchor rod steel, and belongs to the technical field of steel bar production. The method comprises the following steps: converter smelting, continuous casting, finishing, detection on smelted finished product, controlled rolling, and controlled cooling. The technologies on the right-rotating anchor rod steel and the left-rotating anchor rod steel are different: the right-rotating anchor rod steel is cooled by water so as to improve the surface hardness and steel bar strength, and the left-rotating anchor rod steel is cooled naturally so as to guarantee the good processing property of the left-rotating anchor rod steel. At the same time, the K1 hole, K2 hole, and phase-position adjusting mechanism of a hot rolling machine are precisely designed and improved in order to reduce the size errors of the anchor rod steel and improve the standardization degree. The produced anchor rod prepared from the provided anchor rod steel can more stably and reliably cooperate with a nut, the assembly is more stable and firm, and the installation efficiency of a supporting protective structure is improved.

Description

technical field [0001] The invention belongs to the technical field of steel bar production, and relates to a production method of hot-rolled straight threaded steel bar, in particular to a production method of anchor rod steel. Background technique [0002] In recent years, with the development of the coal industry and the continuous strengthening of safety management, coal mines urgently need underground support materials with low price, good quality and reliable safety performance, and hot-rolled mine anchor steel just meets this requirement. Hot-rolled mine anchor steel is mainly used in coal mine roadway support engineering, which plays an important role in ensuring smooth roadway and safe underground operation, so it is widely used in the construction and production of coal mine industry. [0003] Anchor rod steel is the raw material used by coal mining enterprises to make anchor rods. It is mainly used in coal mine roadways and slopes for supporting and anchoring. In...

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Problems solved by technology

[0004] In production practice, the right-handed anchor steel does not need to be processed separately. In theory, the rolled mine anchor steel only needs to mill out the same thread groove with the upper and lower rolls, and then the qualified product can be rolled out and matched with the nut. It can be used immediately, but in fact, when milling slots, the installation of the rolls is random, and the milling slots are also random, so it is easy for the two rolls to form a corner; and the randomness of the roll joints, temperature changes, and the connection between the connecting gear and the rolls The gap between the keys will also cause an error angle between the two rolls, and the sum of all these angle errors will form a total angle error, which will cause the threads of the upper and lower rolls to not be on the same helical line, resulting in a hard-to-fit connection between the anchor rod steel and the nut The situation affects the installation efficiency, and also affects the stability and safety of the anchor steel when it is connected with other components.

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