Cold rolled material production equipment and cold rolling method

Abstract

Cold rolled material manufacturing equipment comprises: an unwinding device (21a) for unwinding a hot rolled coil after acid pickling; joining means (23), disposed on the exit side of the unwinding device, for joining the tail end of a preceding coil (25b) to the leading end of a succeeding coil (22a) unwound from the unwinding device; a rolling mill (10a, 10b) for continuously rolling the coils, with the leading end and the tail end of the coils being joined, in one direction; a strip storage device (50), disposed between the joining means and the rolling mill, for storing a strip S in order to perform continuous rolling by the rolling mill during joining of the preceding coil and the succeeding coil by the joining means; a strip cutting device (28) for cutting the strip to a desired length; a winding device (24) for winding the rolled coil; transport means (30) for withdrawing the coil from the winding device, and transporting the coil to the unwinding device (21a, 21b) so that the coil is rolled a plurality of times until the strip thickness of the coil reaches a desired product strip thickness; and a rolling speed control device (40) for controlling a rolling speed during joining of the preceding coil and the succeeding coil to a lower speed than a steady rolling speed.

Description

technical field [0001] The invention relates to a cold rolling material manufacturing equipment and a cold rolling method. Background technique [0002] As equipment for mass production of cold-rolled materials with an annual output of 1.2 million to 1.5 million tons or more, tandem cold-rolling mill (tandem mill) equipment with more than three cold-rolling mills arranged, or in tandem The tandem continuous cold rolling mill equipment (hereinafter referred to as TCM equipment) that is equipped with a joining device and a strip storage device on the entry side of the cold rolling mill equipment and continuously rolls without stopping rolling is being developed. Practical. In addition, in this TCM facility, a tandem continuous pickling cold rolling mill facility (hereinafter, referred to as PL-TCM facility) is being put into practical use, which is arranged between the joining device and the strip storage device to remove the heat Pickling equipment for the scale of the roll...

AI Technical Summary

Problems solved by technology

In addition, there is a problem that with the increase in the number of joints, an increase in the number of fractures of the joint is expected, and it is necessary to reduce the number of joints and improve the reliability of the joint.

[0024] In the continuous single-station cold rolling facility described in Patent Document 2, the above-mentioned problem remains as a problem.

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