Withdrawal and straightening machine for square and round billets

Abstract

The invention provides a withdrawal and straightening machine for square and round billets. The withdrawal and straightening machine for the square and round billets comprises a lower base (10), an upper fixed plate (30), a lower roll mechanism (20), an upper roll installation frame (31), a driving mechanism (33), an upper roll mechanism (40) and a driving motor (32), wherein the lower roll mechanism (20) comprises a first concave roll (21) and a first flat roll (22); the upper roll mechanism (40) comprises a second concave roll (41) and a second flat roll (42); and the upper roll mechanism (40) and the lower roll mechanism (20) have a first working state under which the first flat roll (22) is matched with the second flat roll (42) and a second working state under which the first concave roll (21) is matched with the second concave roll (41). According to the withdrawal and straightening machine for the square and round billets, required press rolls can be replaced according to different online modes of the continuously cast billets, the withdrawal and straightening machine is simple and convenient to use, the time loss is effectively reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of mechanical continuous casting, in particular to a drawing and straightening machine for square and round billets. Background technique [0002] During the continuous casting process, due to the effect of selective crystallization during the solidification process, a large amount of solutes with low melting points are enriched between the dendrites. The residual liquid enriched with impurities flows to the center and fills it, resulting in defects such as center segregation and center porosity of the slab. Since center segregation and center porosity cannot be eliminated by subsequent rolling or annealing treatment, and under high stress conditions, center segregation and center porosity are likely to cause delamination of the slab, so solving center segregation and center porosity is the key to improving slab quality an effective way. [0003] The soft reduction technology at the end of solidification is a new te...

AI Technical Summary

Problems solved by technology

However, for the continuous casting machine with both square and round billets, due to the different pressing rolls used to produce square billets and round billets, it is necessary to use rollers with grooves to produce round billets, and to use flat rolls when producing square billets, especially in When performing light reduction, the two types of rollers cannot be interchanged. Therefore, the rollers must be replaced when the billets have different shapes and sections. This will increase time costs, reduce production efficiency, and greatly increase the workload.

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