Cold-rolled material manufacturing equipment and cold-rolling method

Abstract

In the cold-rolled material facility and cold-rolling method, high efficiency and high yield can be maintained and excellent cost performance can be achieved in small-scale to medium-scale production facilities with an annual output of about 300,000 to 600,000 tons. The strip material of the coil (101a) rolled out from the uncoiler (2) is directly guided to the cold rolling mill (1) and rolled, and is wound on the winding and uncoiler (4), and the coil (101a ) when the tail end reaches the splicing device (5), splice the coil (101a) and the front end of the coil (101b) that is unwound from the uncoiling device (2), and then repeat the rolling and splicing after the coil (101b) , carry out the rolling of the first pass implemented by the cold rolling mill (1) and the bonding implemented by the bonding device (5), thereby making a plurality of coils into a combined coil (102), and the combined coil (102) Reverse rolling is performed for a predetermined number of times until the desired product thickness is obtained, and the combined coil (102) is cut by the cutting device (6a) or (6b) in the final pass to form a plurality of coils (103).

Description

technical field [0001] The invention relates to cold-rolled material manufacturing equipment and a cold-rolling method. Background technique [0002] As a rolling equipment for producing cold-rolled materials of various steel types in a small amount with an annual output of about 300,000 tons, the following reversible cold-rolling equipment (hereinafter referred to as RCM equipment) has been put into practical use. The configuration of the reversible cold-rolling equipment includes: 1. A cold rolling mill; the strip coiling and decoiling device used as the coiling and unwinding of the strip on the inlet side and the outlet side of the cold rolling mill, Between the coil units, the strip is reversibly rolled until it is rolled to the desired plate thickness. [0003] Furthermore, there is also a facility with two rolling mills (hereinafter referred to as a double-stand reversible facility) in order to increase the annual output of the RCM facility to approximately 500,000 to...

AI Technical Summary

Problems solved by technology

These welding machines can ensure high butt joint accuracy, but on the other hand, since a large number of highly rigid and high-precision parts are used, the equipment becomes larger and more expensive than other joining methods

In the case of applying these welding machines to large-scale production equipment such as PL-TCM with an annual output of more than 1 million tons, the proportion of welding machine costs to the overall equipment investment cost is relatively low, which is hardly a problem, but it is suitable for annual output of 300,000 tons In the case of small-scale to medium-scale equipment ranging from about 1 ton to 600,000 tons, the proportion becomes large, which poses a problem in terms of cost performance and makes it difficult to apply

[0016] Second, there is a problem related to the junction of the composite coil

When tension acts on the coil in a state where a joint with a steep step is located in the inner layer of the combined coil, the step of the joint is transferred to the inside and outside of each layer, resulting in a product to be processed as an impression Problems exist due to bad

[0018] In addition, in the case of joining by seam welding of the overlapping method, there is a problem that a difference in level occurs at the joining portion, which similarly leads to defective products.

[0019] Third, there are issues related to coil growth

When the coil length increases, in order to apply the tension required for rolling through the coil, the torque required by the coil becomes larger in a linear proportion to the outer diameter of the coil, and there is a large-scale drive device for the coil. topic

[0021] Fourth, there are issues related to coil truncation

However, if it occurs in the final pass, the quality of surface gloss will be impaired, and there is a problem of becoming a defective product for materials with strict quality requirements

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