Airbag type constant-pressure tension platform

Abstract

The invention discloses an airbag type constant-pressure tension platform, which belongs to the field of steel rolling machinery. The objective of the invention is to overcome the problem of nonuniform tension caused by tension establishment with pressure of upper and lower plates in the process of curling after slitting of sheet metal in the prior art. The airbag type constant-pressure tension platform is mainly composed of an upper pressing plate, a lower pressing plate and screwdown cylinders, wherein the screwdown cylinders apply pressure onto the upper pressing plate to tightly press a plurality of plate belts between the upper pressing plate and the lower pressing plate, so tension is established in the curling process of the plate belts. The airbag type constant-pressure tension platform is characterized in that an airbag is arranged below the lower pressing plate, and the lower pressing plate is formed by a plurality of sheets of piano type structures which are arrayed in parallel. According to the airbag type constant-pressure tension platform disclosed by the invention, tension adjustment and tension control become simple because of the designs of an airbag type structure and the piano type lower pressing plate, and the pressing force is uniform, so tension fluctuation caused by abnormal plate shapes and uneven thickness of strips can be compensated; and the tension of each strip tends to be consistent in the curling process, so the tightness degree of each coil of the strip is consistent, end faces of the strips are ordered, and defects of staggered layers and the like are reduced.

Description

technical field [0001] The invention relates to an air bag type constant pressure tension table in the field of steel rolling machinery. Background technique [0002] At present, in the metal sheet slitting production, the upper and lower pressing plates are basically used to establish the tension for the rewinding of the multi-strips after slitting. The device is composed of a fixed lower pressing plate, a movable upper pressing plate and a pressing oil cylinder. Afterwards, the upper platen presses the metal strip under the action of the depressing oil cylinder, giving it a set pressure. This pressure will give the metal strip a resistance that deviates from the traction direction during the process of being pulled by the coiler, and this resistance forms a coiling process. tension in the process. [0003] The device mainly has the following problems during use: [0004] 1. The tension of a single metal strip is unbalanced: due to the uneven thickness of the strip, poor ...

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Problems solved by technology

[0004] 1. The tension of a single metal strip is unbalanced: due to the uneven thickness of the strip, poor plate shape and other reasons, the upper and lower pressure plates give each strip a different pressing force during the compression process, which makes the tension of each strip inconsistent, resulting in The winding tension is different;

[0005] 2. It is impossible to make up for the uneven pressure caused by the wear of different strips on the upper and lower pressure plates: although felt will be added during production to prevent the pressure plate from being scratched and at the same time increase friction, but once the wear is caused, the upper and lower pressure plates lack a compensation mechanism to compensate for the wear. Uneven pressure everywhere;

[0006] 3. Inaccurate tension adjustment: The tension adjustment is realized by pressing down the oil cylinder. Since the upper platen driven by the oil cylinder is difficult to solve the synchronization problem, it will affect the uniformity of tension

[0007] To sum up, the platen tension table often causes defects such as collapsed rolls and uneven winding during production and use, and what’s more, it will cause plate shape defects, which makes it difficult to meet the cutting requirements of high-precision products

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