Rolling machine

Abstract

The invention fixes a pair of carrying roller on the intake of the rolling machine to lead the mill bar between another pair of roller which is respectively up and down the machine also. With such a device, front of the mill bar can be rolled leaving few disfigurements though using no film on it.

Description

technical field [0001] The present invention relates to a rolling mill capable of appropriately rolling the ends of a rolled material. Background technique [0002] For a long time, as this kind of rolling mill, there is a rolling mill set in the following way: (1) when the rolling material is passed on the work roll, the roll gap is opened first so as not to hinder the passing of the plate (through the plate), (2) the rolling After the material passes through the rolling mill, the roll gap becomes a specified value through a hydraulic pressing device, (3) the rolled material is coiled on the coiler on the exit side, (4) rolled, and (5) the rear end of the rolled material is rolled When leaving the coiler on the entrance side, a certain tension is applied to the rear end side portion of the rolled material with a tension applying device (refer to JP-A-10.263613). [0003] In the prior art described above, it has been pointed out that there is a problem that the front end of...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned prior art has been pointed out to have the following problem: because the roll gap is opened when the rolled material is passed on the work roll (roll), therefore, the front end of the rolled material is still not rolled, and the front end becomes waste.

[0009] However, on the contrary, the pad part is made of soft material, and the wear of the pad is serious. Therefore, it must be replaced after several rolls are rolled (several times in one shift), and time is lost due to the preparation and replacement of the pad parts. Reduced productivity

[0010] When rolling the front end, the upper die is lowered, the lower die is raised, and the front end of the rolled material is clamped by the upper and lower clamps, the die is advanced, and the front end of the rolled material is sent between the work rolls. It is difficult to carry out this series of actions continuously, usually, it is temporarily stopped in the middle, so the productivity is correspondingly reduced

[0011] In addition, defects (stop marks) are often produced on the surface of the rolled material due to temporary stop

[0012] Also, at the moment when the rolling material is bitten between the work rolls, since the rolling material is stretched by the work rolls, the die is pulled in the feed direction (exit side) of the rolling material, and a transient force is applied to the die for a moment. Therefore, the guide part of the sticky die (the guide part for advancing) is caused to be worn, and there is a disadvantage that the life of the guide part of the sticky die is shortened.

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