A thermal sawing process suitable for small round steel bars

Abstract

The invention discloses a hot-state sawing process suitable for small round steel bars, which includes a hot saw machine conveying roller table, and clamping and straightening devices are placed on two adjacent roller tables of the hot saw machine conveying roller table When the small round steel bars are arranged in parallel in parallel and transported to the position of the clamping and straightening device by the conveying roller of the hot saw machine, the height of the clamping and straightening device will be raised upwards so that the height of the highest surface at the top is greater than the specified height. Describe the height of the highest surface on the top of the conveyor roller table of the hot saw machine. Use the clamping and straightening device to clamp and raise the small round bars arranged in parallel in parallel, and then rotate the clamping and straightening device 90° from the horizontal position to the vertical position. position, so that the clamped horizontal rows of small round bars arranged in parallel are arranged vertically and in parallel, and finally the sawing is completed by the hot saw machine. The invention can improve the sawing speed, stability and thermal straightening ability of the hot saw machine when sawing the small round steel.

Description

technical field [0001] The invention relates to a hot-state sawing technology for small round steel bars, and more specifically relates to a hot-state sawing technology suitable for small round steel bars. Background technique [0002] The hot saw machine is widely used in the iron and steel metallurgy industry, especially as an online cutting equipment for section steel rolling production. It is generally installed on the production line after the rolling mill, and its main function is to cut the head, tail and length of the rolled piece. In many cases, especially when rolling small round bars with a diameter below 100mm in batches, the production capacity of the entire rolling shop will be affected due to the limitation of the sawing efficiency of the hot saw machine. Bottleneck process of factory capacity. [0003] The flow process of existing thermal sawing machine sawing small round steel is as follows: [0004] After the rolling of the rolling mill is completed, 4 to...

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Problems solved by technology

[0006] 1) After being collected by the collecting roller table, it is sent to the hot saw, and after being clamped by the clamping rod, it is arranged in parallel in a horizontal row. Based on the diameter of 80mm, 5 pieces are collected each time, and the reciprocating sawing stroke is at least 800mm. The long stroke of the hot saw machine leads to slow sawing speed, so that the sawing speed cannot reach the rolling speed of the rolling mill, making the hot sawing process a bottleneck affecting the production capacity of the entire production line;

[0007] 2) Since the compression rod is a side pressure type, when the size of the round steel is small, if the force is uneven or the collected round steel is not neat, the pressing force in the side direction will increase the risk of small round steel climbing or even entanglement. Once the above situation occurs, basically it can only be solved by manually using a crowbar, which is time-consuming and labor-intensive, and also increases the curvature of the hot round steel;

[0008] 3) Since the hot saw machine needs to have cooling water always on when it is working, the sawing stroke is too long so that the cooling water of the hot saw machine splashes onto the surface of the hot round steel for a long time, which is very easy for steel types with high alloy content. lead to quenching cracking;

[0009] 4) The lateral pressure clamping plate can only be straightened for the bending of the small round steel in the horizontal direction, and the bending in the vertical direction cannot be handled

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