Connecting method for endless-rolled intermediate billets of hot-rolled strip steel
A technology of endless rolling and hot-rolled strip, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of easy to produce broken strips, high laser power, high temperature of joints, and achieve fast connection speed , The effect of simple process equipment and high connection strength
Inactive Publication Date: 2013-01-23
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
At the same time, the temperature of the connection zone is higher than that of other parts of the strip, and its strength is also lower than other regions. Therefore, the connection zone becomes a weak link in the endless rolling process, and it is easy to produce broken strips.
[0006] The laser heating joining method is a joining technology adopted by Nippon Steel. Compared with the induction heating joining method, it can eliminate the existence of unjoined parts, but there are still problems that the temperature of the joint part is higher than other parts, and the applicable steel types are limited; and the laser The required power is very large, which significantly increases equipment and production costs
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[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0034] Such as figure 1 As shown, the connection method of the hot-rolled strip endless rolling intermediate billet provided by the present invention, on the conventional hot continuous rolling production line, between the hot coil box 20 after the rough rolling mill 10 and the finishing mill F1 30, a shearing machine 40 is set And press machine 50, wherein, 60 is front block middle blank, and 70 is rear block middle blank.
[0035] Such as figure 2 As shown, the upper part and the lowe...
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A method for joining intermediate blanks in endless rolling of hot strip comprises the following steps: cutting off the head and the tail of the intermediate blanks (60,70) by a shearer (40) after rough rolling, in order that the intermediate blanks have two flat straight end surfaces; aligning the ends of two consecutive intermediate blanks; pressing out teeth on the opposite surfaces at the ends of the two consecutive intermediate blanks by a press (50), in order that tooth-shape regions are formed on the opposite surfaces at the ends of the two consecutive intermediate blanks; lap joining the tooth-shape region at the tail of the former intermediate blank with the tooth-shape region at the head of the latter intermediate blank; pressing the ends of the two consecutive intermediate blanks together by the press. The method has advantages of simple process and equipment, high joint strength, fast joining speed, and wide range of application.
Description
technical field [0001] The invention relates to a method for connecting a hot-rolled strip steel endless rolling intermediate billet, in particular to a method for connecting a hot-rolled strip steel endless rolling intermediate billet by means of crimping, and belongs to the technical field of hot-rolled strip steel. Background technique [0002] Hot-rolled strip endless rolling technology is one of the most advanced technologies in the world's steel production. It can connect several rough-rolled intermediate billets and continuously enter the finishing rolling unit for continuous and stable rolling. , and is stably cooled and phase-transformed by the laminar cooling line, and finally cut by flying shears and coiled into multiple hot-rolled strip coils by a coiler. Compared with conventional rolling, endless rolling can significantly increase production efficiency and yield, improve strip threading performance, reduce roll consumption, and realize stable production of new ...
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IPC IPC(8): B21D39/02
CPCB23K2201/16B23K20/24B21B2201/10B23K20/021B21B15/0085B23K2101/16
Inventor 康永林
Owner UNIV OF SCI & TECH BEIJING